阅读说明：本技术 一种具有长效寿命的扇形包的制作方法 (Manufacturing method of fan-shaped bag with long service life ) 是由 梅燕娜 暴延强 张昊 王志谈 林雪川 于礼勇 宋斌 杨晋娜 卢凤君 柴超超 于 2021-05-22 设计创作，主要内容包括：本发明公开了一种具有长效寿命的扇形包的制作方法,涉及扇形包制作技术领域。包括以下步骤：S1：制备扇形包模具；S2：将扇形包模具进行预处理后,放入扇形包外壳内,然后向扇形包外壳与扇形包模具的空隙之间浇注包衬料；S3:浇注完毕后使包衬料凝固,然后移除扇形包模具,再将拆除模具后的扇形包包衬在室温下固化,并在扇形包衬内刷涂水基石墨涂料；S4：将步骤S3中经过室温固化后的扇形包包衬进行烘干。本发明通过使用模型进行包衬料浇注,能保证扇形包浇注后的包底形状,实现扇形包等量铁水流出浇注,具有密实度高、强度高、孔隙率低和耐高温特点,同时,采用本发明方法制作的扇形包具有寿命长、出色的抗渣能力及容易清渣和抗侵蚀能力强特点。(The invention discloses a method for manufacturing a fan-shaped bag with a long service life, and relates to the technical field of fan-shaped bag manufacturing. The method comprises the following steps: s1: preparing a fan-shaped bag mold; s2: after the sector ladle mold is pretreated, the sector ladle mold is placed into a sector ladle shell, and then a ladle lining material is poured into a gap between the sector ladle shell and the sector ladle mold; s3, solidifying the packing material after the pouring is finished, then removing the fan-shaped packing mould, curing the fan-shaped packing after the mould is removed at room temperature, and brushing water-based graphite paint in the fan-shaped packing; s4: and (4) drying the fan-shaped packing linings cured at the room temperature in the step (S3). The invention can ensure the shape of the ladle bottom after the pouring of the fan-shaped ladle by using the mould to pour the ladle lining, realizes the outflow pouring of the equivalent molten iron of the fan-shaped ladle, and has the characteristics of high compactness, high strength, low porosity and high temperature resistance.)

1. A method for manufacturing a fan-shaped bag with long service life is characterized by comprising the following steps:

s1: preparing a fan-shaped bag mold;

s2: after the fan-shaped ladle mold is pretreated, the fan-shaped ladle mold is placed into a fan-shaped ladle shell, then a ladle lining material is poured into a gap between the fan-shaped ladle shell and the fan-shaped ladle mold, and a vibrating rod is used for vibrating in the pouring process;

s3, solidifying the packing material after the pouring is finished, then removing the fan-shaped packing mould, curing the fan-shaped packing after the mould is removed at room temperature, and brushing water-based graphite paint in the fan-shaped packing;

s4: and (4) drying the fan-shaped packing linings cured at the room temperature in the step (S3).

2. The method of claim 1, wherein the method comprises the steps of: the fan-shaped package mold is made of an iron plate with the thickness of 8 mm.

3. The method of claim 1, wherein the method comprises the steps of: the pretreatment of the fan-shaped package mold comprises the steps of wrapping a layer of plastic film outside the fan-shaped package mold, and then brushing grease outside the plastic film.

4. The method of claim 1, wherein the method comprises the steps of: the fan-shaped cladding shell is an outermost steel cladding layer.

5. The method of claim 1, wherein the method comprises the steps of: ceramic fiber paper is further paved on the inner wall of the fan-shaped package shell.

6. The method of claim 1, wherein the method comprises the steps of: the ladle lining is formed by mixing and stirring high-alumina silicon carbide-containing castable and water, wherein the castable and the water are in the following proportion: water is 100: 5-5.5.

7. The method of claim 6, wherein the method further comprises: SiO in the castable₂Content of (3) is 7%, Al₂O₃Is 58%, CaO is 0.7%, the total content of SiC and C is 32%, and the balance is TiO₂、MgO、Na₂O and K₂And O, wherein the average accounting ratio of the casting material with the granularity of less than 0.063mm is 26%, and the average accounting ratio of the casting material with the granularity of more than 0.063mm is 74%.

8. The method of claim 1, wherein the method comprises the steps of: in the step S3, the solidification time is 12-15h, and the solidification time is 12 h.

9. The method of claim 1, wherein the method comprises the steps of: in the step S3, the Baume degree of the water-based graphite paint is 46-50, the suspension property is 96-99%, the density is 1.25-1.35g/ml, the condition viscosity is 6-8S, the gas forming amount is less than or equal to 16.7ml/g, and the wear resistance of the coating is 1.0-2.0 g; and consists of the following raw materials in percentage by weight：SiO₂ 21-25％，Al₂O₃8-10%, C is more than or equal to 60%, and adhesive is 5-10%, wherein the sum of the weight percentages is 100%.

10. The method of claim 1, wherein the method comprises the steps of: in the step S4, the ladle lining is dried by using a ladle baking device, the temperature rising rate of the ladle baking device is not more than 20 ℃/hour, and the temperature of the ladle baking device during drying is 400 ℃.

Technical Field

The invention relates to a fan-shaped bag, in particular to a manufacturing method of a fan-shaped bag with a long service life.

Background

In the pouring process of the fan-shaped ladle, as shown in figure 1, the fan-shaped ladle rotates around the center of a circle at a certain angular speed, and the amount of molten iron flowing out of the fan-shaped ladle in unit time is certain, so that the equal pouring of molten iron in the pouring process can be realized, and the uniformity of the wall thickness of the pipe wall is facilitated. Because the addition of the inoculant in unit time is also constant in the pouring process, the realization of equal pouring also ensures that the amount of the inoculant in the molten iron in unit weight is also constant, which is beneficial to the stability of product quality.

However, during the casting process, the ladle is not only subjected to mechanical impact of the liquid molten iron, but also subjected to long-term high-temperature storage of the full ladle of molten iron. At present, under the traditional molten iron casting fan-shaped package process, after a fan-shaped package works for a long time, high-temperature molten iron easily permeates into a permanent layer through a working lining and then reaches a fan-shaped package cladding, and a fan-shaped package penetrating or cladding red accident is caused, so that the adverse effects of low personnel safety factor of workers, low service life of the fan-shaped package (scrapping in 12 hours in one shift and re-repairing), high refractory consumption and the like are caused, and meanwhile, along with the great improvement of the yield of each specification of the nodular cast iron pipe, the repair quantity of the fan-shaped package is large, and the rejection rate is also increased.

In order to repair the fan-shaped ladle, the fan-shaped ladle in actual production is not as described above, as shown in fig. 2, because knotting and repairing of the ladle lining are manually completed, and because of the characteristic of large accommodation, workers must enter the ladle to work when knotting the ladle lining, so that the fan-shaped ladle is difficult to be knotted into a standard fan shape but a structure close to a trapezoid, when the fan-shaped ladle rotates around the center of a circle at a certain angular speed, the amount of molten iron flowing out of the fan-shaped ladle in unit time is not certain, so that the equal-amount pouring of molten iron in the pouring process cannot be realized, the wall thickness of the wall of the pipe is not uniform, and the amount of an inoculant in the molten iron in unit weight cannot be ensured to be certain, so that the stability of the product quality is not facilitated.

Therefore, the improvement of the casting process of the fan-shaped ladle is urgently needed, so that the quality and the service life of the fan-shaped ladle are improved, the cost consumption is controlled, and the equivalent molten iron outflow casting of the fan-shaped ladle is realized.

Disclosure of Invention

The invention provides a method for manufacturing a fan-shaped bag with long service life, and aims to solve the problems in the background art.

In order to achieve the technical purpose, the invention mainly adopts the following technical scheme:

a method for manufacturing a fan-shaped bag with long service life comprises the following steps:

s1: preparing a fan-shaped bag mold;

s2: after the fan-shaped ladle mold is pretreated, the fan-shaped ladle mold is placed into a fan-shaped ladle shell, then a ladle lining material is poured into a gap between the fan-shaped ladle shell and the fan-shaped ladle mold, and a vibrating rod is used for vibrating in the pouring process;

s3, solidifying the packing material after the pouring is finished, then removing the fan-shaped packing mould, curing the fan-shaped packing after the mould is removed at room temperature, and brushing water-based graphite paint in the fan-shaped packing;

s4: and (4) drying the fan-shaped packing linings cured at the room temperature in the step (S3).

In the invention, the fan-shaped ladle mold is made of an iron plate with the thickness of 8 mm.

In the invention, the pretreatment of the fan-shaped package mold comprises the steps of wrapping a layer of plastic film outside the fan-shaped package mold, and then brushing grease outside the plastic film.

Preferably, in the present invention, the fan-shaped casing is an outermost steel casing layer.

Furthermore, ceramic fiber paper is paved on the inner wall of the fan-shaped package shell.

Preferably, the lining material is prepared by mixing and stirring a high-alumina silicon carbide-containing castable and water, and the castable and the water are in a ratio of: water is 100: 5-5.5.

Furthermore, SiO in the casting material₂Content of (3) is 7%, Al₂O₃Is 58%, CaO is 0.7%, the total content of SiC and C is 32%, and the balance is TiO₂、MgO、Na₂O and K₂And O, wherein the average accounting ratio of the casting material with the granularity of less than 0.063mm is 26%, and the average accounting ratio of the casting material with the granularity of more than 0.063mm is 74%.

In one embodiment of the present invention, in step S3, the solidification time is 12-15h, and the solidification time is 12 h.

Preferably, in the step S3, the baume degree of the water-based graphite paint is 46-50, the suspension property is 96-99%, the density is 1.25-1.35g/ml, the conditional viscosity is 6-8S, the gas evolution is less than or equal to 16.7ml/g, and the wear resistance of the coating is 1.0-2.0 g; and consists of the following raw materials in percentage by weight: SiO 2₂21-25％，Al₂O₃8-10%, C is more than or equal to 60%, and adhesive is 5-10%, wherein the sum of the weight percentages is 100%.

Preferably, in the step S4, the ladle lining is dried by using a ladle baking device, the temperature rising rate of the ladle baking device is not more than 20 ℃/hour, and the temperature of the ladle baking device during drying is 400 ℃.

Compared with the prior art, the invention has the following beneficial effects: the invention can ensure the shape of the ladle bottom after the pouring of the fan-shaped ladle by using the model, realizes the outflow pouring of the equivalent molten iron of the fan-shaped ladle, has the characteristics of high compactness, high strength, low porosity and high temperature resistance, simultaneously, the fan-shaped ladle manufactured by the method has the characteristics of long service life, excellent slag resistance, easy slag removal and strong anti-corrosion capability, can not pass through a non-brickwork joint permanent layer to reach the fan-shaped ladle shell in the repeated dumping work, and realizes the function of the fan-shaped ladle with long service life.

Drawings

FIG. 1 is a schematic diagram of a theoretical working principle of a fan-shaped bag;

fig. 2 is a schematic diagram of the actual working principle of the fan-shaped bag.

Detailed Description

The present invention will be described in further detail with reference to examples, which are not intended to limit the scope of the present invention.

Example 1

The making process of the fan-shaped bag is as follows:

s1: manufacturing a fan-shaped ladle mold by using an iron plate with the thickness of 8 mm;

s2: wrapping a layer of plastic film outside the fan-shaped package mold, brushing butter outside, and then putting into a fan-shaped package shell, wherein ceramic fiber paper is paved on the inner wall of the fan-shaped package shell in advance, so that demolding is facilitated, cracks generated by the fan-shaped package mold during shrinkage of a pouring package liner are eliminated, then the pouring package liner is poured between the fan-shaped package shell and a gap of the fan-shaped package mold, wherein the packing liner is formed by mixing and stirring a high-alumina silicon carbide-containing pouring material and water, and the proportion between the pouring material and the water is that the pouring material: water is 100:5, namely when 100Kg of castable is used, 5Kg of water is required to be used for mixing and stirring, the castable is prepared after stirring for 5min, and meanwhile, a vibrating rod is used for vibrating in the pouring process by utilizing the castable; wherein SiO in the castable used in the invention₂Content of (3) is 7%, Al₂O₃Is 58%, CaO is 0.7%, the total content of SiC and C is 32%, and the balance is TiO₂、MgO、Na₂O and K₂O, and in the casting material, the average content of the casting material is less than 26% of the average content of the casting material with the granularity of less than 0.063mm, and the average content of the casting material is more than 74% of the average content of the casting material with the granularity of more than 0.063mm, and the ladle lining prepared by adopting the casting material has high compactness, high strength, low porosity and high temperature resistanceIs characterized in that;

in the embodiment, the fan-shaped cladding shell is an outermost steel cladding layer.

S3, solidifying the packing material for 12h after the pouring is finished, then removing the fan-shaped packing mold, curing the fan-shaped packing material with the mold removed at room temperature for 12h, and brushing water-based graphite paint in the fan-shaped packing material; wherein, the water-based graphite paint consists of the following raw materials in percentage by weight: SiO 2₂21％，Al₂O₃10 percent, C69 percent and 10 percent of adhesive, and the detection shows that the baume degree of the water-based graphite coating is 46, the suspension property is 96 percent, the density is 1.25g/ml, the condition viscosity is 6-8s, the gas forming amount is less than or equal to 16.7ml/g, and the wear resistance of the coating is 1.0 g.

S4: and (4) drying the fan-shaped ladle lining solidified at the room temperature in the step (S3) by using a ladle baking device, wherein the heating rate of the ladle baking device is 10 ℃/h, the temperature of the ladle baking device during drying is 400 ℃, and the phenomenon that flame impacts local heating is avoided, otherwise, steam is burst is caused.

Meanwhile, when the fan-shaped ladle lining prepared by the method is pre-sintered to different temperatures, the relevant performance detection is carried out, and the result is shown in table 1.

Preburning to (. degree.C.)	Bulk density (Kg/m)3)	Compressive strength (N/mm)2)	Permanent Linear Change (%)
				110	2780	35	-
1600	2650	40	+1.6％

Example 2

The making process of the fan-shaped bag is as follows:

s1: manufacturing a fan-shaped ladle mold by using an iron plate with the thickness of 8 mm;

s2: wrapping a layer of plastic film outside the fan-shaped package mold, brushing butter outside, and then putting into a fan-shaped package shell, wherein ceramic fiber paper is paved on the inner wall of the fan-shaped package shell in advance, so that demolding is facilitated, cracks generated by the fan-shaped package mold during shrinkage of a pouring package liner are eliminated, then the pouring package liner is poured between the fan-shaped package shell and a gap of the fan-shaped package mold, wherein the packing liner is formed by mixing and stirring a high-alumina silicon carbide-containing pouring material and water, and the proportion between the pouring material and the water is that the pouring material: water is 100:5.2, when 100Kg of castable is used, 5.2Kg of water is required to be used for mixing and stirring, the castable is prepared after stirring for 5min, and meanwhile, a vibrating rod is used for vibrating in the pouring process by utilizing the castable; wherein SiO in the castable used in the invention₂Content of (3) is 7%, Al₂O₃Is 58%, CaO is 0.7%, the total content of SiC and C is 32%, and the balance is TiO₂、MgO、Na₂O and K₂The grain size of the casting material is smaller than 0.063mm, the average proportion of the casting material is 26%, the grain size of the casting material is larger than 0.063mm, the average proportion of the casting material is 74%, and the ladle lining prepared by adopting the casting material has the characteristics of high compactness, high strength, low porosity and high temperature resistance;

in the embodiment, the fan-shaped cladding shell is an outermost steel cladding layer.

S3, solidifying the packing material for 13h after the pouring is finished, then removing the fan-shaped packing mould, and curing the fan-shaped packing lining with the mould removed at room temperatureBrushing water-based graphite paint in the fan-shaped packing lining for 12 h; wherein, the water-based graphite paint consists of the following raw materials in percentage by weight: SiO 2₂23％，Al₂O₃9 percent, C60 percent and adhesive 8 percent. Through detection, the baume degree of the water-based graphite coating is 48, the suspension property is 98%, the density is 1.3, the conditional viscosity is 6-8s, the gas evolution is less than or equal to 16.7ml/g, and the wear resistance of the coating is 1.5 g.

S4: and (4) drying the fan-shaped ladle lining solidified at the room temperature in the step (S3) by using a ladle baking device, wherein the heating rate of the ladle baking device is 15 ℃/h, the temperature of the ladle baking device during drying is 400 ℃, and the phenomenon that flame impacts local heating is avoided, otherwise, steam is burst is caused.

Meanwhile, when the fan-shaped ladle lining prepared by the method is pre-sintered to different temperatures, the relevant performance detection is carried out, and the result is shown in table 2.

Preburning to (. degree.C.)	Bulk density (Kg/m)3)	Compressive strength (N/mm)2)	Permanent Linear Change (%)
				110	2756	34	-
1600	2651	41	+1.5％

Example 3

The making process of the fan-shaped bag is as follows:

s1: manufacturing a fan-shaped ladle mold by using an iron plate with the thickness of 8 mm;

s2: wrapping a layer of plastic film outside the fan-shaped package mold, brushing butter outside, and then putting into a fan-shaped package shell, wherein ceramic fiber paper is paved on the inner wall of the fan-shaped package shell in advance, so that demolding is facilitated, cracks generated by the fan-shaped package mold during shrinkage of a pouring package liner are eliminated, then the pouring package liner is poured between the fan-shaped package shell and a gap of the fan-shaped package mold, wherein the packing liner is formed by mixing and stirring a high-alumina silicon carbide-containing pouring material and water, and the proportion between the pouring material and the water is that the pouring material: water is 100:5.5, namely when 100Kg of castable is used, 5.5Kg of water is required to be used for mixing and stirring, the castable is prepared after stirring for 5min, and meanwhile, a vibrating rod is used for vibrating in the pouring process by utilizing the castable; wherein SiO in the castable used in the invention₂Content of (3) is 7%, Al₂O₃Is 58%, CaO is 0.7%, the total content of SiC and C is 32%, and the balance is TiO₂、MgO、Na₂O and K₂The grain size of the casting material is smaller than 0.063mm, the average proportion of the casting material is 26%, the grain size of the casting material is larger than 0.063mm, the average proportion of the casting material is 74%, and the ladle lining prepared by adopting the casting material has the characteristics of high compactness, high strength, low porosity and high temperature resistance;

in this embodiment, the fan-shaped casing includes an outermost steel cladding layer.

S3, solidifying the packing material for 15h after pouring, removing the fan-shaped packing mould, curing the fan-shaped packing material with the mould removed at room temperature for 12h, and brushing water-based graphite paint in the fan-shaped packing material; the water-based graphite coating comprises the following raw materials in parts by weight: SiO 2₂25％，Al₂O₃8 percent, more than or equal to 62 percent of C and 5 percent of adhesive. Through detection, the baume degree of the water-based graphite coating is 50, the suspension property is 99 percent, the density is 1.35, the conditional viscosity is 6-8s,the gas forming amount is less than or equal to 16.7ml/g, and the wear resistance of the coating is 2.0g.

S4: and (4) drying the fan-shaped ladle lining solidified at the room temperature in the step (S3) by using a ladle baking device, wherein the heating rate of the ladle baking device is 20 ℃/h, the temperature of the ladle baking device during drying is 400 ℃, and the phenomenon that flame impacts local heating is avoided, otherwise, steam is burst is caused.

Meanwhile, when the fan-shaped ladle lining prepared by the method is pre-sintered to different temperatures, the relevant performance detection is carried out, and the result is shown in table 3.

Preburning to (. degree.C.)	Bulk density (Kg/m)3)	Compressive strength (N/mm)2)	Permanent Linear Change (%)
				110	2733	33	-
1600	2639	42	+1.7％

Through detection, the highest working temperature of the fan-shaped packing prepared by the method of the embodiment 1-3 of the invention is 1700 ℃, and the highest volume density is 2900kg/m³。

The permanent layer of the fan-shaped bag formed by pouring the castable provided by the invention has no brick joints. The improved fan-shaped ladle is repeatedly poured, if molten iron permeates into a working lining, the molten iron only reaches sand gaps among gaps of a permanent layer, and the molten iron cannot penetrate through the permanent layer without brick gaps to reach the fan-shaped ladle shell, so that the function of the fan-shaped ladle with long service life is realized.

The manufactured fan-shaped bag is firstly ironed and then put into use, sticky slag is cleaned every 2 hours, the service life reaches 10 shifts, the fan-shaped bag is scrapped after 120 hours, and then a new bag lining is manufactured again.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.