阅读说明：本技术 一种连续超高温炉炉盖及其浇注料 (Furnace cover of continuous ultra-high temperature furnace and castable thereof ) 是由 陈开斌 刘建军 孙丽贞 黎应和 罗钟生 王珣 尹大伟 杜婷婷 傅栿 于 2021-07-26 设计创作，主要内容包括：本发明特别涉及一种连续超高温炉炉盖及其浇注料,属于超高温炉技术领域,浇注料包括混合料和溶剂,以质量计,所述混合料的成分包括：骨料85％-90％、氧化铝结合剂8％-13％、高效减水剂0.1％-0.2％和添加剂3％-8％；所述溶剂占所述混合料的2％-4％；采用该浇注料能有效减少有害气体对炉盖砖体腐蚀,减少因炉盖损坏导致的停炉,延长炉盖使用寿命5倍以上,提高了超高温炉运行时间。(The invention particularly relates to a furnace cover of a continuous ultra-high temperature furnace and a castable thereof, belonging to the technical field of ultra-high temperature furnaces, wherein the castable comprises a mixture and a solvent, and the mixture comprises the following components in parts by mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 3-8% of additive; the solvent accounts for 2% -4% of the mixture; by adopting the castable, the corrosion of harmful gas to a furnace cover brick body can be effectively reduced, the furnace shutdown caused by the damage of the furnace cover is reduced, the service life of the furnace cover is prolonged by more than 5 times, and the running time of the ultra-high temperature furnace is improved.)

1. The castable for the furnace cover of the continuous ultra-high temperature furnace is characterized by comprising a mixture and a solvent, wherein the mixture comprises the following components in parts by mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 3-8% of additive; the solvent accounts for 2% -4% of the mixture.

2. The castable material for the furnace cover of the continuous ultra-high temperature furnace as claimed in claim 1, wherein the aggregate comprises corundum and/or corundum powder.

3. The castable material for the furnace cover of the continuous ultra-high temperature furnace as claimed in claim 1, wherein the alumina binder comprises alumina sol.

4. The castable material for the furnace cover of the continuous ultra-high temperature furnace as claimed in claim 1, wherein the additive comprises titanium oxide and talcum powder.

5. The utility model provides a continuous ultra-high temperature furnace bell which characterized in that, the bell includes:

the metal furnace cover shell comprises a furnace cover top plate and a furnace cover side plate, and the furnace cover top plate is provided with a positive mounting hole;

the wedge-shaped refractory brick is arranged on the furnace cover top plate around the positive mounting hole and used for forming an extension section of the positive mounting hole, and the wedge-shaped refractory brick and the metal furnace cover shell form a pouring space with one side opened;

the casting material is filled in the casting space; the castable comprises a mixture and a solvent, and the mixture comprises the following components in mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 3-8% of additive; the solvent accounts for 2% -4% of the mixture;

and the anchoring bricks are distributed in the casting material.

6. The continuous ultra high temperature furnace cover according to claim 5, wherein a thermal insulation buffer layer is arranged between the metal cover shell and the castable.

7. The furnace cover of the continuous ultra-high temperature furnace as claimed in claim 6, wherein the heat insulation buffer layer is heat insulation cotton.

8. The furnace cover of the continuous ultra-high temperature furnace as claimed in claim 5, wherein the anchoring brick is provided with at least one tapered section along the central axis of the positive mounting hole.

9. The furnace cover of the continuous ultra-high temperature furnace as claimed in claim 5, wherein an insulating layer is arranged at the edge of the positive electrode mounting hole.

10. The continuous ultra-high temperature furnace cover according to claim 5, wherein the aggregate comprises corundum and/or corundum powder; the alumina binder comprises alumina sol; the additive comprises titanium oxide and talcum powder.

Technical Field

The invention belongs to the technical field of ultra-high temperature furnaces, and particularly relates to a furnace cover of a continuous ultra-high temperature furnace and a castable thereof.

Background

The continuous ultrahigh temperature furnace is a metallurgical furnace for producing carbon, and is a main device for high-temperature heat treatment of carbon materials such as calcined petroleum coke, residual electrodes, waste cathodes and the like. The carbon material is subjected to ultra-high temperature heat treatment in a furnace to obtain a high-value carbon product.

The continuous ultra-high temperature furnace mainly comprises a material distribution device, a furnace body, positive and negative electrode heating devices, a smoke centralized drainage device, a cooling device, a discharging device and the like. The material adds in the furnace body via the distributing equipment, through positive negative pole heating device ultra-temperature heating, impurity sublimation in the carbonaceous material is the gaseous state to effectively dissociate with the carbonaceous material, realize the high purification and the graphitization of carbonaceous material, the flue gas after the impurity sublimation mixes the back with the air that gets into in the stove, leads to the flue discharge stove through the flue gas is concentrated drainage device, and the ultra-temperature material is discharged through discharge device after cooling device cools off.

Because of containing corrosive composition in the carbonaceous material, and the ultra-high temperature furnace bell is in under the aerobic environment of high temperature, leads to bell oxidation (air), corrodes serious problem to and change after the oxidation corrosion and cause the blowing out scheduling problem, need develop the sealed, corrosion-resistant, anti-oxidant ultra-high temperature bell of tightening, solve ultra-high temperature bell life weak point, influence the problem of the whole operating time of stove.

Disclosure of Invention

The application aims to provide a furnace cover of a continuous ultra-high temperature furnace and a castable thereof, so as to solve the problems that the service life of the furnace cover of the continuous ultra-high temperature furnace is short and the whole operation time of the furnace is short due to corrosion at present.

The embodiment of the invention provides a castable for a furnace cover of a continuous ultrahigh-temperature furnace, which comprises a mixture and a solvent, wherein the mixture comprises the following components in parts by mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 5-8% of additive; the solvent accounts for 2% -4% of the mixture.

Optionally, the aggregate comprises corundum and/or corundum powder and the like.

Optionally, the alumina binder includes alumina sol, etc.

Optionally, the additive comprises titanium oxide, talcum powder and the like.

Based on the same inventive concept, the embodiment of the invention also provides a furnace cover of the continuous ultra-high temperature furnace, which comprises:

the metal furnace cover shell comprises a furnace cover top plate and a furnace cover side plate, and the furnace cover top plate is provided with a positive mounting hole;

the wedge-shaped refractory brick is arranged on the furnace cover top plate around the positive mounting hole and used for forming an extension section of the positive mounting hole, and the wedge-shaped refractory brick and the metal furnace cover shell form a pouring space with one side opened;

the casting material is filled in the casting space; the castable comprises a mixture and a solvent, and the mixture comprises the following components in mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 5-8% of additive; the solvent accounts for 2% -4% of the mixture;

and the anchoring bricks are distributed in the casting material.

Optionally, a heat insulation buffer layer is arranged between the metal furnace cover shell and the castable.

Optionally, the heat insulation buffer layer is heat insulation cotton.

Optionally, the anchor brick is provided with at least one variable diameter section along the central axis direction of the positive mounting hole.

Optionally, an insulating layer is disposed at the edge of the positive mounting hole.

Optionally, the aggregate comprises corundum and/or corundum powder and the like.

Optionally, the alumina binder includes alumina sol, etc.

Optionally, the additive comprises titanium oxide, talcum powder and the like.

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

the castable for the furnace cover of the continuous ultra-high temperature furnace provided by the embodiment of the invention comprises a mixture and a solvent, wherein the mixture comprises the following components in parts by mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 5-8% of additive; the solvent accounts for 2% -4% of the mixture; by adopting the castable, the corrosion of harmful gas to a furnace cover brick body can be effectively reduced, the furnace shutdown caused by the damage of the furnace cover is reduced, the service life of the furnace cover is prolonged by more than 5 times, and the running time of the ultra-high temperature furnace is improved.

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 schematic view of a furnace lid according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram 1 of an anchoring brick provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram 2 of an anchoring brick provided by an embodiment of the present invention;

reference numerals: 1-metal furnace cover shell, 11-furnace cover top plate, 111-anode mounting hole, 12-furnace cover side plate, 2-wedge-shaped refractory brick, 3-casting material, 4-anchoring brick, 5-heat insulation buffer layer and 6-anode.

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.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

according to an exemplary embodiment of the invention, a castable for a furnace cover of a continuous ultra-high temperature furnace is provided, the castable comprises a mixture and a solvent, and specifically, the solvent can be selected from water; the mixture comprises the following components in percentage by mass: aggregate 85% -90%, including but not limited to 85%, 86%, 87%, 88%, 89%, 90%, alumina binder 8% -13%, including but not limited to 8%, 9%, 10%, 11%, 12%, 13%, superplasticizer 0.1% -0.2%, and additive 3% -8%, including but not limited to 3%, 4%, 5%, 6%, 7%, 8%; the water accounts for 2% -4% of the mixture, including but not limited to 2%, 3%, 4%.

As an alternative embodiment, the aggregate comprises corundum and/or corundum powder, etc.

As an alternative embodiment, the alumina binder includes an alumina sol or the like.

The aggregate is corundum and/or corundum powder, is a high-quality high-temperature material, can resist the erosion of acidic and alkaline harmful gases, the anti-erosion performance of the masonry can be ensured by controlling the mass fraction of the aggregate to be 85% -90%, the construction performance of the masonry can be ensured at the same time, the construction performance of the material can be influenced by excessively large mass fraction, and the high-temperature performance of the product can be influenced by excessively small mass fraction;

the alumina binder is used for organically combining various corundum with different grain diameters and other raw materials, ensuring that a green body has higher strength at each temperature section and does not carry impurities, controlling the mass fraction of the alumina binder to be 8-13%, and balancing construction performance, green body quality and sintering quality;

the high-efficiency water reducing agent is used for dispersing ultrafine powder or micro powder in materials, reducing water addition amount, improving fluidity and further improving green body strength, and the reason for controlling the mass fraction of the high-efficiency water reducing agent to be 0.1-0.2% is that the construction performance is excellent, the blank strength can reach 120MPa, and the blank strength and the construction performance are influenced when the mass fraction is too large or too small; specifically, the high-efficiency water reducing agent can be selected from sodium tripolyphosphate, sodium hexametaphosphate, naphthalene series, melamine series and water reducing agents compounded by the sodium hexametaphosphate, the naphthalene series, the melamine series and the like.

The additive mainly comprises titanium oxide, talcum powder and the like, and has the functions of adjusting the solidification time, controlling the change of a re-burning line and improving the high-temperature corrosion resistance.

According to another exemplary embodiment of the present invention, there is provided a furnace cover for a continuous ultra high temperature furnace, the furnace cover comprising:

the metal furnace cover shell comprises a furnace cover top plate and a furnace cover side plate, and the furnace cover top plate is provided with a positive mounting hole;

the metal furnace cover shell is made of high-temperature-resistant and corrosion-resistant steel, generally speaking, a furnace cover top plate and a furnace cover side plate are integrally formed, the connection angle of the furnace cover top plate and the furnace cover side plate is determined according to a corresponding furnace body, and a positive mounting hole formed in the furnace cover top plate can be circular or square.

The wedge-shaped refractory brick is arranged on the furnace cover top plate around the positive mounting hole and used for forming an extension section of the positive mounting hole, and the wedge-shaped refractory brick and the metal furnace cover shell form a pouring space with one side opened;

the positive mounting hole extends through the whole furnace cover, the hole is formed by building wedge-shaped refractory bricks, the wedge-shaped refractory bricks are hung on a furnace cover top plate of a metal furnace cover shell, the edge of the upper surface of the hole is provided with refractory bricks with certain thickness and is connected with the metal furnace cover shell, and an insulating sleeve is arranged between the refractory bricks, the metal furnace cover shell and castable to protect the insulating effect of the furnace cover

The casting material is filled in the casting space; the castable comprises a mixture and water, and the mixture comprises the following components in parts by mass: 85-90% of aggregate, 8-13% of alumina binder, 0.1-0.2% of high-efficiency water reducing agent and 5-8% of additive; the water accounts for 2% -4% of the mixture;

pouring materials are integrally poured and formed, so that the whole furnace cover can be conveniently replaced.

And the anchoring bricks are distributed in the casting material.

The anchoring bricks are uniformly distributed and fixed in a pouring space between the refractory brick masonry and the metal furnace cover shell, are of cylindrical or cuboid structures, and are distributed with a plurality of variable diameter parts along the length direction of the anchoring bricks.

As an optional embodiment, a thermal insulation buffer layer is arranged between the metal furnace cover shell and the castable, and specifically, the thermal insulation buffer layer is heat preservation cotton.

The furnace lid of the continuous ultra-high temperature furnace and the castable thereof are described in detail below with reference to examples, comparative examples and experimental data.

Example 1

The enterprise A adopts a continuous ultra-high temperature furnace to dispose the waste cathode, the furnace cover of the continuous ultra-high temperature furnace is integrally built, and the old furnace cover can be directly lifted away for replacement. The upper part of the metal furnace cover shell is of a cylindrical structure, the diameter of the metal furnace cover shell is 3300mm, the height of the metal furnace cover shell is 500mm, the metal furnace cover shell is made of high-temperature-resistant corrosion-resistant steel and is used as a main body for attaching a furnace cover refractory material, and 10mm of heat-preservation cotton is paved on the inner surface of the furnace cover shell and is used for heat insulation and buffering; the center of the furnace cover is a through hole with the diameter of 1100mm, the furnace cover is formed by building wedge-shaped refractory bricks, the wedge-shaped refractory bricks are hung on a metal furnace shell, the edge of the upper surface of the through hole of the furnace cover is a refractory brick with the diameter of 20mm and is connected with the metal furnace cover shell, and an insulating sleeve is arranged among the refractory bricks, the metal furnace cover shell and castable to protect the refractory bricks and ensure the insulating effect of the furnace cover. The anchoring bricks are uniformly fixed between the refractory brick masonry and the metal furnace cover shell, are of cylindrical or cuboid structures, and are distributed with a plurality of variable diameter parts along the length direction of the anchoring bricks with the height of 330 mm. The space that materials such as metal furnace lid shell, resistant firebrick, anchor brick formed each other adopts corrosion-resistant pouring material integrated into one piece to pour the shaping, and the pouring material height is 500 and supplyes 520 mm. The corrosion-resistant castable is prepared from 86.4% of corundum and corundum powder, 10% of alumina binder, 3.5% of additive, 0.1% of external high-efficiency water reducing agent and 3.5% of drinking water or tap water in the mixture.

Example 2

The enterprise B adopts a continuous ultra-high temperature furnace to dispose the waste cathode, the furnace cover of the continuous ultra-high temperature furnace is integrally built, and the old furnace cover can be directly lifted away for replacement. The upper part of the metal furnace cover shell is of a cylindrical structure, the diameter of the metal furnace cover shell is 3500mm, the height of the metal furnace cover shell is 520mm, the metal furnace cover shell is made of high-temperature-resistant corrosion-resistant steel and is used as a main body for attaching furnace cover refractory materials, and 8mm of heat-preservation cotton is paved on the inner surface of the furnace cover shell and is used for heat insulation and buffering; the center of the furnace cover is a through hole with the diameter of 1000mm, the furnace cover is formed by building wedge-shaped refractory bricks, the wedge-shaped refractory bricks are hung on a metal furnace shell, the edge of the upper surface of the through hole of the furnace cover is a refractory brick with the diameter of 30mm and is connected with the metal furnace cover shell, and an insulating sleeve is arranged among the refractory bricks, the metal furnace cover shell and castable to protect the refractory bricks and ensure the insulating effect of the furnace cover. The anchoring bricks are uniformly fixed between the refractory brick masonry and the metal furnace cover shell, are of cylindrical or cuboid structures and are distributed with a plurality of variable diameter parts along the length direction of the anchoring bricks with the height of 340 mm. The space that materials such as metal furnace lid shell, resistant firebrick, anchor brick formed each other adopts corrosion-resistant pouring material integrated into one piece to pour the shaping, and the pouring material height is 510 supplyes 530 mm. The corrosion-resistant castable is prepared from 88.6% of corundum and corundum powder, 8% of alumina binder, 3.28% of additive, 0.12% of external high-efficiency water reducing agent and 3.1% of drinking water or tap water in the mixture.

Comparative example 1

The enterprise A adopts a continuous ultra-high temperature furnace to dispose the waste cathode, the furnace cover of the continuous ultra-high temperature furnace is integrally built, and the old furnace cover can be directly lifted away for replacement. The upper part of the metal furnace cover shell is of a cylindrical structure, the diameter of the metal furnace cover shell is 3300mm, the height of the metal furnace cover shell is 500mm, the metal furnace cover shell is made of high-temperature-resistant corrosion-resistant steel and is used as a main body for attaching a furnace cover refractory material, and 10mm of heat-preservation cotton is paved on the inner surface of the furnace cover shell and is used for heat insulation and buffering; the center of the furnace cover is a through hole with the diameter of 1100mm, the furnace cover is formed by building wedge-shaped refractory bricks, the wedge-shaped refractory bricks are hung on a metal furnace shell, the edge of the upper surface of the through hole of the furnace cover is a refractory brick with the diameter of 20mm and is connected with the metal furnace cover shell, and an insulating sleeve is arranged among the refractory bricks, the metal furnace cover shell and castable to protect the refractory bricks and ensure the insulating effect of the furnace cover. The anchoring bricks are uniformly fixed between the refractory brick masonry and the metal furnace cover shell, are of cylindrical or cuboid structures, and are distributed with a plurality of variable diameter parts along the length direction of the anchoring bricks with the height of 330 mm. The space that materials such as metal furnace lid shell, resistant firebrick, anchor brick formed each other adopts corrosion-resistant pouring material integrated into one piece to pour the shaping, and the pouring material height is 500 and supplyes 520 mm. The corrosion-resistant castable is prepared from 74.4% of corundum and corundum powder, 22% of alumina binder, 3.5% of additive, 0.1% of external high-efficiency water reducing agent and 3.5% of drinking water or tap water in the mixture.

Comparative example 2

The enterprise A adopts a continuous ultra-high temperature furnace to dispose the waste cathode, the furnace cover of the continuous ultra-high temperature furnace is integrally built, and the old furnace cover can be directly lifted away for replacement. The upper part of the metal furnace cover shell is of a cylindrical structure, the diameter of the metal furnace cover shell is 3300mm, the height of the metal furnace cover shell is 500mm, the metal furnace cover shell is made of high-temperature-resistant corrosion-resistant steel and is used as a main body for attaching a furnace cover refractory material, and 10mm of heat-preservation cotton is paved on the inner surface of the furnace cover shell and is used for heat insulation and buffering; the center of the furnace cover is a through hole with the diameter of 1100mm, the furnace cover is formed by building wedge-shaped refractory bricks, the wedge-shaped refractory bricks are hung on a metal furnace shell, the edge of the upper surface of the through hole of the furnace cover is a refractory brick with the diameter of 20mm and is connected with the metal furnace cover shell, and an insulating sleeve is arranged among the refractory bricks, the metal furnace cover shell and castable to protect the refractory bricks and ensure the insulating effect of the furnace cover. The anchoring bricks are uniformly fixed between the refractory brick masonry and the metal furnace cover shell, are of cylindrical or cuboid structures, and are distributed with a plurality of variable diameter parts along the length direction of the anchoring bricks with the height of 330 mm. The space that materials such as metal furnace lid shell, resistant firebrick, anchor brick formed each other adopts corrosion-resistant pouring material integrated into one piece to pour the shaping, and the pouring material height is 500 and supplyes 520 mm. The corrosion-resistant castable is prepared from 94.2% of corundum and corundum powder, 4% of alumina binder, 1.7% of additive, 0.1% of external high-efficiency water reducing agent and 3.5% of drinking water or tap water in the mixture.

The service life results of the furnace covers of examples 1-2 and comparative examples 1-2 were as follows:

	service life of furnace cover (moon)
		Example 1	14
Example 2	15
		Comparative example 1	3
Comparative example 2	2

According to the table, the furnace cover provided by the embodiment of the invention has slight corrosion, the service life of the furnace cover is greatly prolonged to 15 months, the occurrence of furnace shutdown is reduced, and the running time of the ultra-high temperature furnace is prolonged; as can be seen from a comparison of the comparative example data and the example data, the service life of the furnace lid is lower when the mixing ratio of the castable used is outside the range provided by the present application.

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

(1) the furnace cover provided by the embodiment of the invention can effectively reduce the corrosion of harmful gas to the brick body of the furnace cover, reduce furnace shutdown caused by the damage of the furnace cover, prolong the service life of the furnace cover by more than 5 times and improve the running time of an ultra-high temperature furnace.

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.