阅读说明：本技术 防止喷补反弹料对高炉炉况影响的操作方法及其修补料 (Operation method for preventing gunning rebound material from influencing blast furnace condition and gunning rebound material thereof ) 是由 杨军昌 李迎辉 许满胜 边晋生 张佳伟 于 2020-12-31 设计创作，主要内容包括：本发明特别涉及防止喷补反弹料对高炉炉况影响的操作方法及其修补料,属于高炉炼铁技术领域,方法包括：在待修补的炉体内的高温炉料上设置降温隔离层；进行第一次喷补料；第一次喷补料产生的反弹料于降温隔离层上粘结形成第一反弹料粘结层；破碎第一反弹料粘结层；进行第二次喷补料；第二次喷补料产生的反弹料粘结形成第二反弹料粘结层；在第二反弹料粘结层上设置补热层；在补热层上设置辅料层；通过控制炉身喷补反弹料对高炉炉况的影响,加快了高炉恢复进程减少损失。(The invention particularly relates to an operation method for preventing gunning rebound materials from influencing the condition of a blast furnace and a gunning rebound material thereof, belonging to the technical field of blast furnace ironmaking and comprising the following steps: arranging a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired; carrying out first gunning material; the rebound material generated by the first gunning material is bonded on the cooling isolation layer to form a first rebound material bonding layer; breaking the first bonding layer of the rebound material; performing second gunning material; the rebound materials generated by the second gunning material are bonded to form a second rebound material bonding layer; arranging a heat supplementing layer on the second rebound material bonding layer; arranging an auxiliary material layer on the heat supplementing layer; the influence of the gunning rebound material on the furnace condition of the blast furnace is controlled, so that the recovery process of the blast furnace is accelerated, and the loss is reduced.)

1. An operating method for preventing gunning of a rebound from affecting blast furnace conditions, the method comprising:

arranging a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired;

adopting gunning materials to repair the furnace body for the first time; the rebound material generated by the first repairing is bonded on the cooling isolation layer to form a first rebound material bonding layer;

breaking the first bonding layer of rebound material;

adopting gunning materials to carry out secondary repair on the furnace body; the rebound material generated by the second repairing is bonded to form a second rebound material bonding layer;

arranging a heat supplementing layer on the second rebound material bonding layer;

and arranging an auxiliary material layer on the heat supplement layer.

2. The method of claim 1, wherein the material of the cooling barrier layer comprises granulated slag, and the moisture content of the granulated slag is less than 10% by mass.

3. The method of claim 1, wherein the thickness of the cooling insulation layer is 150mm-250 mm.

4. The method of claim 1, wherein said breaking said first layer of bonded rebound material comprises:

scattering and smashing the steel pieces on the first rebound material bonding layer, and crushing the first rebound material bonding layer; and then, the first rebound material bonding layer is subjected to supplementary crushing by using bulk coke.

5. The method of claim 4, wherein the weight of the individual steel pieces is less than 50 Kg.

6. The method of claim 1 wherein the material of the heat-patch layer comprises coke.

7. The operating method for preventing gunning of a rebound from affecting the condition of a blast furnace as set forth in claim 1, wherein the thickness of the heat-repairing layer is 600mm to 800 mm.

8. The method of claim 1, wherein the material of the auxiliary layer comprises fluorite.

9. A repair mass for preventing the effect of a gunning rebound on the condition of a blast furnace, for use in the method of any one of claims 1 to 8, comprising:

the grain slag is used for forming a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired;

the gunning material is used for repairing the furnace body;

the crushing agent is used for crushing the rebound materials generated by the gunning material to bond so as to form a rebound material bonding layer; the crushing agent comprises steel pieces and bulk coke;

coke to form a heat patch;

fluorite to form an auxiliary material layer.

10. The repair mass for preventing the impact of gunning of a rebound on a blast furnace condition as set forth in claim 9, wherein the amount of the granulated slag is: enough to form a cooling isolation layer of 150mm-250mm in the furnace body to be repaired;

the coke amount is: enough to form a 600mm-800mm heat-repairing layer in the furnace body to be repaired;

the steel part amount is: 5-7% of the weight of the gunning material;

the amount of the bulk coke is as follows: 2-4% of the weight of the gunning material;

the amount of fluorite is: accounting for 3-5% of the weight of the gunning material.

Technical Field

The invention belongs to the technical field of blast furnace ironmaking, and particularly relates to an operation method for preventing a gunning rebound material from influencing a blast furnace condition and a gunning rebound material.

Background

After the blast furnace is opened and put into operation, the lining is damaged by the erosion of the factors such as furnace burden abrasion, gas flow scouring, alkali metal erosion, slag and molten iron erosion and the like, so that the furnace type is damaged. Especially the inner lining of the blast furnace shaft part can be impacted and abraded in the furnace burden descending process; scouring in the rising process of the gas flow; the blast furnace is damaged by the influence of factors such as the corrosion of alkali metal, zinc steam, deposited carbon and the like, the corrosion of primary formed slag, and the stripping caused by thermal shock and the like, thereby damaging the shape of the blast furnace. In order to maintain the furnace body structure and prolong the service life of the blast furnace, thermal spray repair measures are taken to repair the lining of the furnace body part of the blast furnace, so that the spray-repaired furnace shape is close to the reasonable furnace shape when the furnace is opened.

Disclosure of Invention

The applicant finds in the course of the invention that: in the spray repair process, the repair material sprayed on the furnace wall rebounds and falls on the high-temperature material surface in the furnace to form the rebound material. Because the gunning material has the characteristics of high melting point, strong caking property and good slag resistance, the rebound material can be bonded on high-temperature furnace burden in the furnace. After the blast furnace is re-ventilated, the blast furnace charge column has poor air permeability and poor slag fluidity; thereby causing furnace condition accidents such as wind holding, material hanging and the like; the recovery of the furnace condition after the blast furnace is re-ventilated is influenced, so that the recovery time is long, the yield index is reduced, the fuel ratio and the consumption of spare parts are increased, and the cost is increased.

In view of the above problems, the present invention has been made to provide an operating method for preventing the impact of gunning a rammer on the condition of a blast furnace and a rammer therefor, which overcome the above problems or at least partially solve the above problems.

The embodiment of the invention provides an operation method for preventing gunning rebound materials from influencing the condition of a blast furnace, which comprises the following steps:

arranging a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired;

adopting gunning materials to repair the furnace body for the first time; the rebound material generated by the first repairing is bonded on the cooling isolation layer to form a first rebound material bonding layer;

breaking the first bonding layer of rebound material;

adopting gunning materials to carry out secondary repair on the furnace body; the rebound material generated by the second repairing is bonded to form a second rebound material bonding layer;

arranging a heat supplementing layer on the second rebound material bonding layer;

and arranging an auxiliary material layer on the heat supplement layer.

Optionally, the material of the cooling isolation layer includes water granulated slag, and the water content of the water granulated slag is less than 10% by mass.

Optionally, the thickness of the cooling isolation layer is 150mm-250 mm.

Optionally, the breaking the first bound layer of rebound material specifically comprises:

scattering and smashing the steel pieces on the first rebound material bonding layer, and crushing the first rebound material bonding layer; and then, the first rebound material bonding layer is subjected to supplementary crushing by using bulk coke.

Optionally, the weight of a single piece of said steel piece is less than 50 Kg.

Optionally, the material of the heat patch comprises coke.

Optionally, the thickness of the heat repairing layer is 600mm-800 mm.

Optionally, the material of the auxiliary material layer comprises fluorite.

Based on the same inventive concept, the embodiment of the present invention further provides a repair material for an operation method for preventing a gunning rebound material from affecting a furnace condition of a blast furnace, which is used for the operation method for preventing the gunning rebound material from affecting the furnace condition of the blast furnace, and the repair material comprises:

the grain slag is used for forming a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired;

the gunning material is used for repairing the furnace body;

the crushing agent is used for crushing the rebound materials generated by the gunning material to bond so as to form a rebound material bonding layer; the crushing agent comprises steel pieces and bulk coke;

coke to form a heat patch;

fluorite to form an auxiliary material layer.

Optionally, the amount of the granulated slag is as follows: enough to form a cooling isolation layer of 150mm-250mm in the furnace body to be repaired;

the coke amount is: enough to form a 600mm-800mm heat-repairing layer in the furnace body to be repaired;

the steel part amount is: 5-7% of the weight of the gunning material;

the amount of the bulk coke is as follows: 2-4% of the weight of the gunning material;

the amount of fluorite is: accounting for 3-5% of the weight of the gunning material.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

the operation method for preventing gunning rebound materials from influencing the furnace condition of the blast furnace, provided by the embodiment of the invention, comprises the following steps: arranging a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired; carrying out first gunning material; the rebound material generated by the first gunning material is bonded on the cooling isolation layer to form a first rebound material bonding layer; breaking the first bonding layer of rebound material; performing second gunning material; the rebound materials generated by the second gunning material are bonded to form a second rebound material bonding layer; arranging a heat supplementing layer on the second rebound material bonding layer; arranging an auxiliary material layer on the heat supplementing layer; the influence of the gunning rebound material on the furnace condition of the blast furnace is controlled, so that the recovery process of the blast furnace is accelerated, and the loss is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a flow chart of a method provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a furnace body provided in an embodiment of the present invention;

FIG. 3 is a schematic view of the charging sequence of each charge material provided by the embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.

Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

The applicant finds in the course of the invention that: in the spray repair process, the repair material sprayed on the furnace wall rebounds and falls on the high-temperature material surface in the furnace to form the rebound material. The feed supplement has the characteristics of high melting point, strong caking property and good slag resistance, so the rebound material can be bonded on high-temperature furnace charge in the furnace. After the blast furnace is re-ventilated, the blast furnace charge column has poor air permeability and poor slag fluidity; thereby causing furnace condition accidents such as wind holding, material hanging and the like; the recovery of the furnace condition after the blast furnace is re-ventilated is influenced, so that the recovery time is long, the yield index is reduced, the fuel ratio and the consumption of spare parts are increased, and the cost is increased.

According to an exemplary embodiment of the present invention, there is provided a repair material for preventing a gunning rebound from affecting a condition of a blast furnace, the repair material including: the grain slag is used for forming a cooling isolation layer on the high-temperature furnace burden in the furnace body to be repaired; the gunning material is used for repairing the furnace body; the crushing agent is used for crushing the rebound materials generated by the gunning material to bond so as to form a rebound material bonding layer; the crushing agent comprises steel pieces and bulk coke; coke to form a heat patch; fluorite to form an auxiliary material layer; wherein the amount of the granulated slag is as follows: enough to form a cooling isolation layer of 150mm-250mm in the furnace body to be repaired; the coke amount was: enough to form a 600mm-800mm heat-repairing layer in the furnace body to be repaired; the amount of the steel parts is as follows: 5-7% of the weight of the gunning material; the amount of the coke briquettes is: 2-4% of the gunning material; the amount of fluorite is: accounting for 3 to 5 percent of the weight of the gunning material.

The grain slag specifically refers to solid waste formed by gangue in ores, ash in fuel and non-volatile components in a flux in a blast furnace ironmaking process; is a byproduct of blast furnace ironmaking. And (3) rapidly cooling the molten slag by using water to granulate the molten slag into fine solid particles, namely the molten slag. In other words, the granulated slag is a water-quenched product of the liquid slag of the blast furnace.

The effect of the granulated slag is as follows:

a. cooling; the low-temperature granulated slag is utilized to reduce the temperature in the furnace as soon as possible, and the spray repair operation temperature is less than 300 ℃, so that the spray repair machine works normally;

b. separating the rebound materials; separating gunning rebound materials from high-temperature furnace burden; the rebound material is not sintered and bonded to form a cooling isolation layer;

c. slagging; the granulated slag is the liquid slag which can be formed again after the clinker is just melted and flows out of the furnace, thereby reducing the heat consumption, and adding the granulated slag can also increase the slag quantity and improve the fluidity;

d. adsorbing and cleaning cooling water of the furnace wall; before gunning operation, in order to make gunning material well bond with the furnace wall, the furnace wall is cleaned, and high-pressure water cleaning is one of the modes. Water flow can flow into the blast furnace after the furnace wall is cleaned by high-pressure water, the water flow is directly contacted with high-temperature furnace burden, a large amount of steam can be generated by gasification, and some water flows into a furnace burden gap, so that the method is possibly unsafe. The water slag layer can adsorb flowing water for cleaning the furnace wall, so that unsafe conditions which may occur are effectively relieved;

e. the heat consumption is reduced; the granulated slag is a blast furnace byproduct and is also a finished product material, and the melting only needs melting heat, does not need reaction heat, and is beneficial to reducing heat consumption;

according to the purpose of using the granulated slag, the amount of the granulated slag is controlled as follows: enough to form a 150mm-250mm cooling isolation layer in the furnace body to be repaired, and the excessive amount can increase the heat consumption and cause waste due to the need of supplementing heat. The amount of slag will be too large, and the discharge outside the furnace will be difficult. If the quantity is too small, the required effect cannot be achieved, and the spray repair operation and the recovery of the furnace condition are influenced;

the steel part and the nodular coke mainly have the function of crushing the bonding layer, and the steel part can adopt recycled waste steel, namely unused or scrapped steel spare parts in a blast furnace production field; it should be noted that: the steel part should avoid using circularly, prevents that circular roll, rolls to the center, leads to being close to the rebound material of brickwork circumferencial direction not by the breakage, can't play the effect that should have. The steel part has the following functions: breaking the rebound material by weight to form a bond; the air permeability is improved; the heat consumption is reduced; because the recovered scrap iron and steel is the recovery of spare parts of iron and steel materials, the melting of the scrap iron and steel only needs melting heat, reaction heat is not needed, the reduction of heat consumption is facilitated, and the following steps are required: the steel parts need to be distributed on the surface of the rebound material in sufficient quantity, and under the condition that the total weight is fixed, the weight of a single block is too large, the distribution is reduced, and the effect is weakened; according to the purpose of using the steel blocks, the weight of the steel pieces is controlled to be 5% -7% of the weight of the gunning material, the heat consumption is increased due to the fact that the steel pieces are too large in weight, and waste is caused due to the fact that heat needs to be supplemented. The labor intensity is increased and the cost is increased. The part is too small, the due effect cannot be achieved, and the part cannot be distributed on the surface of the rebound material according to the requirement to effectively crush the rebound material.

The bulk coke in this embodiment may be bagged coke or barreled coke, and the bagged coke is taken as an example: the coke is loaded for standby by woven bags, the weight of each bag is 20Kg to 30Kg, and the reason for controlling the weight of each bag to be 20Kg to 30Kg is to conveniently convey the coke to the feeding port and conveniently load the coke from the feeding port to the central position of the blast furnace, however, the illustration here is used for explaining the realizable mode and is not used for limiting the invention, and other forms can be adopted in other embodiments, and only the coke needs to be kept in a larger bulk shape, so that the function of crushing can be realized; the bulk coke has the following functions: a. breaking the bond and improving breathability. The recycled scrap iron and steel is affected by weight and field operation environment, is not easy to be added to the central position, and bagged coke with relatively light weight is added to the position close to the center in order to destroy the rebound material adhesion close to the central position and improve air permeability. b. Providing heat, the amount of shot coke, depending on the purpose for which it is used, being: 2-4% of the gunning material, and the excessive amount can increase the coke consumption and cause waste; the labor intensity is increased and the cost is increased. If the amount is too small, the effect cannot be achieved, and the recovery of the furnace condition is influenced;

in addition, the steel piece and the nodular coke can also form a crushing layer, and the function of separating and gunning the rebound materials is achieved.

The coke has the functions of a, making up heat loss and supplementing heat; b. the permeability is improved, the amount of coke being, depending on the purpose for which the coke is used: enough to form a 600mm-800mm heat-repairing layer in the furnace body to be repaired, and the excessive part can increase the coke consumption and cause waste; the excess heat will cause the abnormal furnace condition and the increase of the cost. The thickness is thinned when the part is too small, and the air permeability of the material column is not obviously improved; the heat supplement is insufficient, the furnace is cold, the popularity of the iron slag is poor, the discharge is difficult, the required effect cannot be achieved, and the recovery of the furnace condition is influenced;

the role of fluorite is to reduce the melting point, reduce viscosity, improve fluidity, and according to the purpose of using fluorite, control the amount of fluorite to be: the additive accounts for 3-5% of the weight of the gunning material, and excessive amount can increase heat consumption, cause insufficient temperature and cause secondary furnace condition accidents. Erosion of the brick lining is aggravated; the material waste can be caused. If the amount is too small, the purpose of lowering the melting point, lowering the viscosity, and improving the fluidity cannot be achieved; the furnace condition recovery is influenced because the prior furnace has no effect.

The gunning material is a refractory material specially used for blast furnace gunning, and the main component of the gunning material is Al₂O₃And SiO₂And the like. Specifically, reference may be made to the related prior art such as "technical manual of blast furnace ironmaking production" of the Zhou classics, Beijing, publication of metallurgy industry, 2003, P306-309 ", etc. The gunning material has strong cohesiveness, and after the rebound material is formed, the rebound material is not only bonded to form a bonding layer, but also bonded to furnace burden.

In actual use, after the amount of the gunning material and the amount of other materials are determined according to factors such as the volume of the blast furnace, the gunning height and the thickness, the amount of other components is determined according to the amount of the gunning material.

As an alternative embodiment, the weight of the single steel piece is less than 50Kg, usually the quality of the steel piece is controlled between 20Kg and 50Kg, the length of the single steel piece is convenient for transportation and loading into the furnace, and the length of the single steel piece is usually less than 2.0 m.

The weight and length of the steel piece are controlled, the aim is to break the bonding of the rebound materials, and the ventilation property is improved by forming a framework through the geometric shape. The weight and the length are proper, and the furnace is convenient to transport and load into a designated position in the furnace. The size of the spray repair opening may be limited when some blast furnaces are sprayed and repaired. The weight of the single piece is too large, so that the single piece is not convenient to be loaded into a specified position in the furnace as required; the weight of the single piece is too large, the quantity is small, and the distribution on the whole rebound material surface is not favorable. The weight of the single piece is too small to break, and the length is convenient for conveying and loading into the furnace. The reason why the weight of a single steel piece is less than 50Kg is: considering the physical support of people in the process of carrying and adding steel, when the steel is not carried and added manually, the weight of the steel piece is not limited, and the purpose of breaking the bonding layer is achieved.

According to another exemplary embodiment of the present invention, there is provided an operating method for preventing an influence of gunning refractory on a condition of a blast furnace, the method including:

s1, arranging a cooling isolation layer on high-temperature furnace burden in a furnace body to be repaired;

s2, adopting gunning refractory to repair the furnace body for the first time; bonding the rebound material generated by the first repairing on the cooling isolation layer to form a first rebound material bonding layer;

s3, crushing the first rebound material bonding layer;

s4, adopting gunning refractory to carry out secondary repair on the furnace body; bonding the rebound materials generated by the second repairing to form a second rebound material bonding layer;

s5, arranging a heat supplementing layer on the second rebound material bonding layer;

and S6, arranging an auxiliary material layer on the heat supplementing layer.

As an alternative embodiment, the material of the cooling isolation layer comprises water granulated slag, and the water content of the water granulated slag is less than 10% by mass. In general, in the specific implementation, the granulated slag is prepared one day in advance and is stacked on the side of a belt, and the dosage of the granulated slag can meet the requirement that the thickness of the granulated slag can cover 150mm-250mm on the material surface.

According to the purpose of using the granulated slag, the granulated slag is preferably dry granulated slag, in other words, the smaller the water content of the granulated slag is, the better the granulated slag is, the different treatment modes of the granulated slag are different, the water content is different, after the cost and the using effect are comprehensively considered, the practical water content is less than 10 percent and can completely meet the requirement, and the water content of the granulated slag is selected to be 5 percent, 6 percent, 7 percent, 8 percent or 9 percent in general situations. When the water content of the grain slag is too large, the consumed heat quantity can be increased. The evaporation of water can generate a large amount of steam, which affects the gunning operation. When the furnace wall is cleaned by high-pressure water, the adsorption capacity of the water granulated slag is reduced. Therefore, the control of the moisture content to 10% or less is only an explanation or an option for the implementation of the present invention, and is not intended to limit the present invention, and the effect can be achieved by using the granulated slag having the moisture content of 10% or more in other embodiments, but the effect is not as good as that of using the granulated slag having the moisture content of 10% or less.

Specifically, the method comprises the following steps:

s1, adding water granulated slag; before spray-repairing, firstly, a layer of granulated slag with the thickness of 150mm-250mm is paved on a high-temperature charge level. Firstly, stopping using furnace top equipment after the blast furnace stops blowing, feeding the prepared granulated slag to the furnace top through a belt, and distributing the granulated slag on a high-temperature charge level according to a certain distribution angle through furnace top distribution equipment;

s2, adopting gunning refractory to repair the furnace body for the first time; bonding the rebound material generated by the first repairing on the cooling isolation layer to form a first rebound material bonding layer;

s3, adding recycled waste steel; when the gunning material is gunned to two thirds, the gunning is suspended, on one hand, the gunning effect is observed, on the other hand, the prepared recycled scrap iron and steel pieces are loaded into the furnace from a gunning port, scattered and hit on the formed bound surface of the rebound material, and then bagged coke is added; loading the prepared bagged coke into the position close to the center in the furnace from a gunning port; the reason is that: the recycled waste steel is influenced by weight and field operation environment, is not easy to be added to the central position, and bagged coke with relatively light weight is added to the position close to the center in order to destroy the rebound material adhesion close to the central position and improve the air permeability;

s4, adopting gunning refractory to carry out secondary repair on the furnace body; bonding the rebound materials generated by the second repairing to form a second rebound material bonding layer;

s5, adding coke; after the gunning operation is finished, after the furnace top equipment can normally run, a certain amount of coke is added through a normal feeding procedure, and the laying thickness is 600mm-800 mm;

s6, adding fluorite; fluorite was added centrally by normal loading procedures.

According to the purpose of using the granulated slag, the thickness of the granulated slag is controlled to be 150-250 mm, the excessive thickness can increase the heat consumption, and the heat is required to be supplemented to cause waste. The amount of slag will be too large, and the discharge outside the furnace will be difficult. The too small thickness can not play the corresponding effect, and influences the gunning operation and the later recovery.

According to the purpose of using the coke, the thickness of the bulk coke is controlled to be 600-800 mm, and the excessive thickness can increase the coke consumption and cause waste; the excess heat can be excessive, secondary furnace condition accidents can be caused, and the cost can be increased. When the thickness is too small, the thickness becomes thin, and the air permeability of the material column is not obviously improved; insufficient heat supplement causes furnace cooling, poor slag iron popularity and difficult discharge, cannot achieve the required effect, and influences the recovery of furnace conditions.

The method for repairing a furnace body for preventing the influence of a gunning material on the furnace condition and the repairing material thereof according to the present application will be described in detail with reference to examples, comparative examples and experimental data.

Example 1

Repair a 1080 cubic level blast furnace of a certain smelter, adopt gunning material 60t, calculate the volume of granulating slag, steel, bagged coke, fluorite according to the volume of gunning material, specific proportion is: 7% of steel, 4% of bagged coke, 4% of barreled coke and 5% of fluorite in percentage by weight of the gunning mix; the amount of the granulated slag is as follows: enough to form a 250mm cooling isolation layer in the furnace body to be repaired, wherein the coke amount is as follows: enough to form a heat repairing layer of 800mm in the furnace body to be repaired.

S1, adding water granulated slag; before spray-repairing, firstly, a layer of grain slag is laid on the high-temperature material surface. Firstly, stopping using furnace top equipment after the blast furnace stops blowing, feeding the prepared granulated slag to the furnace top through a belt, and distributing the granulated slag on a high-temperature charge level according to a certain distribution angle through furnace top distribution equipment;

s2, adopting gunning refractory to repair the furnace body for the first time; bonding the rebound material generated by the first repairing on the cooling isolation layer to form a first rebound material bonding layer;

s3, adding recycled waste steel; when the gunning material is gunned to two thirds, the gunning is suspended, on one hand, the gunning effect is observed, on the other hand, the prepared recycled scrap iron and steel pieces are loaded into the furnace from a gunning port, scattered and hit on the formed bound surface of the rebound material, and then bagged coke is added; loading the prepared bagged coke into the position close to the center in the furnace from a gunning port;

s4, adopting gunning refractory to carry out secondary repair on the furnace body; bonding the rebound materials generated by the second repairing to form a second rebound material bonding layer;

s5, adding coke; after the gunning operation is finished, adding coke by a normal feeding procedure after the furnace top equipment can normally run;

s6, adding fluorite; fluorite was added centrally by normal loading procedures.

Example 2

Repairing a blast furnace of the same type as the blast furnace in the embodiment 1, adopting 70t of gunning mix, calculating the amount of water slag, steel, bagged coke, coke and fluorite according to the amount of the gunning mix, wherein the specific proportion is as follows: 5% of steel, 2% of bagged coke and 3% of fluorite in percentage by weight of the gunning mix; the amount of the granulated slag is as follows: enough to form a 150mm cooling isolation layer in the furnace body to be repaired, wherein the coke amount is as follows: enough to form a 600mm heat-repairing layer in the furnace body to be repaired.

S1, adding water granulated slag; before spray-repairing, firstly, a layer of grain slag is laid on the high-temperature material surface. Firstly, stopping using furnace top equipment after the blast furnace stops blowing, feeding the prepared granulated slag to the furnace top through a belt, and distributing the granulated slag on a high-temperature charge level according to a certain distribution angle through furnace top distribution equipment;

s2, adopting gunning refractory to repair the furnace body for the first time; bonding the rebound material generated by the first repairing on the cooling isolation layer to form a first rebound material bonding layer;

s3, adding recycled waste steel; when the gunning material is gunned to two thirds, the gunning is suspended, on one hand, the gunning effect is observed, on the other hand, the prepared recycled scrap iron and steel pieces are loaded into the furnace from a gunning port, scattered and hit on the formed bound surface of the rebound material, and then bagged coke is added; loading the prepared bagged coke into the position close to the center in the furnace from a gunning port;

s4, adopting gunning refractory to carry out secondary repair on the furnace body; bonding the rebound materials generated by the second repairing to form a second rebound material bonding layer;

s5, adding coke; after the gunning operation is finished, adding coke by a normal feeding procedure after the furnace top equipment can normally run;

s6, adding fluorite; fluorite was added centrally by normal loading procedures.

Comparative example 1

Repairing a blast furnace of the same type as the blast furnace in the embodiment 1, adopting 70Kg of gunning mix, calculating the amount of water slag, steel, bagged coke, coke and fluorite according to the amount of the gunning mix, and the specific proportion is as follows: calculated by weight percentage of the gunning mix, the steel is 4%, the bagged coke is 1%, and the fluorite is 2%; the amount of the granulated slag is as follows: enough to form 110 mm's cooling isolation layer in the furnace body of waiting to mend, the quantity of coke is: enough to form a 500mm heat-repair layer in the furnace body to be repaired.

S1, adding water granulated slag; before spray-repairing, firstly, a layer of grain slag is laid on the high-temperature material surface. Firstly, stopping using furnace top equipment after the blast furnace stops blowing, feeding the prepared granulated slag to the furnace top through a belt, and distributing the granulated slag on a high-temperature charge level according to a certain distribution angle through furnace top distribution equipment;

s2, adopting gunning refractory to repair the furnace body for the first time; bonding the rebound material generated by the first repairing on the cooling isolation layer to form a first rebound material bonding layer;

s3, adding recycled waste steel; when the gunning material is gunned to two thirds, the gunning is suspended, on one hand, the gunning effect is observed, on the other hand, the prepared recycled scrap iron and steel pieces are loaded into the furnace from a gunning port, scattered and hit on the formed bound surface of the rebound material, and then bagged coke is added; loading the prepared bagged coke into the position close to the center in the furnace from a gunning port;

s4, adopting gunning refractory to carry out secondary repair on the furnace body; bonding the rebound materials generated by the second repairing to form a second rebound material bonding layer;

s5, adding coke; after the gunning operation is finished, adding coke by a normal feeding procedure after the furnace top equipment can normally run;

s6, adding fluorite; fluorite was added centrally by normal loading procedures.

Comparative example 2

Repairing a blast furnace of the same type as the blast furnace in the embodiment 1, adopting 60Kg of gunning mix, calculating the amount of water slag, steel, bagged coke, coke and fluorite according to the amount of the gunning mix, and the specific proportion is as follows: 8% of steel, 5% of bagged coke and 6% of fluorite in percentage by weight of the gunning mix; the amount of the granulated slag is as follows: enough to form a cooling isolation layer of 300mm in the furnace body to be repaired, wherein the coke amount is as follows: enough to form a 1000mm heat-repairing layer in the furnace body to be repaired.

S1, adding water granulated slag; before spray-repairing, firstly, a layer of grain slag is laid on the high-temperature material surface. Firstly, stopping using furnace top equipment after the blast furnace stops blowing, feeding the prepared granulated slag to the furnace top through a belt, and distributing the granulated slag on a high-temperature charge level according to a certain distribution angle through furnace top distribution equipment;

s2, adopting gunning refractory to repair the furnace body for the first time; bonding the rebound material generated by the first repairing on the cooling isolation layer to form a first rebound material bonding layer;

s3, adding recycled waste steel; when the gunning material is gunned to two thirds, the gunning is suspended, on one hand, the gunning effect is observed, on the other hand, the prepared recycled scrap iron and steel pieces are loaded into the furnace from a gunning port, scattered and hit on the formed bound surface of the rebound material, and then bagged coke is added; loading the prepared bagged coke into the position close to the center in the furnace from a gunning port;

s4, adopting gunning refractory to carry out secondary repair on the furnace body; bonding the rebound materials generated by the second repairing to form a second rebound material bonding layer;

s5, adding coke; after the gunning operation is finished, adding coke by a normal feeding procedure after the furnace top equipment can normally run;

s6, adding fluorite; fluorite was added centrally by normal loading procedures.

The repair results of examples 1-2 and comparative examples 1-2 are shown in the following table:

in the table, the furnace body air permeability refers to the resistance when coal gas passes through the material column, and the detection method is calculated as air volume²Pressure difference; the permeability index is divided into: the difference is less than 10.0; typically (10.0-11.0), suitably (11.0-12.5); high > 12.5.

The slag fluidity means that the slag can flow freely, and the detection method is an eye measurement method; the method is divided into the following steps according to the experience of operators: a difference; generally; better; four cases are good;

it can be known from the data in the table that the blast furnace operation is carried out by adopting the proportion and the method provided by the embodiment through the data in the embodiment 1-2, furnace condition accidents such as wind holding, suspension and the like can not occur, the air permeability of the material column and the fluidity of iron slag after the blast furnace is re-ventilated are good, the yield, the fuel ratio and the consumption condition of spare parts are normal, the furnace body recovery time is short, and the yield loss is less.

One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:

(1) the repairing material and the repairing method provided by the embodiment of the invention adopt a material combination mode to surround and separate the rebound material so as to control the influence of the rebound material;

(2) according to the repair material provided by the embodiment of the invention, the block-shaped object with a certain geometric shape and mass is adopted, so that the bonding of the rebound material is damaged, and the air permeability is improved;

(3) the patching material provided by the embodiment of the invention adopts finished product clinker and furnace burden with low melting point, and neutralizes gunning rebound material with high melting point, so that the melting point of the whole furnace burden is reduced, and the fluidity is improved;

(4) the repair material provided by the embodiment of the invention fully utilizes inherent resources of a production field and reduces the cost.

Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.