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A kind of pouring material for ladle baker burner and preparation method thereof

A roaster and castable technology, which is applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of increased production cost, harsh use environment, frequent alternating hot and cold, etc., and achieve low cost and long service life Effect

Active Publication Date: 2019-12-17
GANGCHENG GRP LIANGSHAN RUIHAI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the ladle roaster equipment, the firing nozzle (referred to as the burner) is the core component, and its service life directly affects the use of the ladle roaster and the process rhythm of steelmaking, and the burner is a component The medium refractory castable part is very easy to damage, mainly because of its extremely harsh use environment. First, the high temperature of the use environment is 800-1200 ℃, and second, frequent alternating cold and heat, which causes the burner castable to fall off and drop.
[0003] Taking a domestic steel factory as an example, the service life of the newly purchased burner castable part is about half a year (the average baking time is 18 hours per day). After the castable falls off in the first service cycle, the traditional refractory castable is used Repair, its service life is basically about 2 months. Basically, the whole burner can no longer be repaired after repairing about 2 times. This frequent repair operation not only affects the rhythm of steelmaking production process, but also increases the labor intensity of maintenance operators. , and greatly reduces the service life of the entire burner, making the production cost increase

Method used

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  • A kind of pouring material for ladle baker burner and preparation method thereof
  • A kind of pouring material for ladle baker burner and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0046] The preparation method of the casting material for the firing nozzle of the above-mentioned ladle roaster comprises the following steps:

[0047] a. Use automatic weighing equipment to weigh the raw materials according to the weight ratio;

[0048] b. The weighed raw materials are transported to the mixer through the batching trolley according to the aggregate of 3mm or more. After stirring for a certain period of time, the powder below 3mm is transported to the mixer through the batching trolley, and the stirring is continued. In this order The reason for stirring is mainly to prevent dust during stirring, and to ensure the uniformity of stirring and save stirring time.

[0049] Wherein, in the step b of the preparation method of the castable for ladle baker burners, the mixing time of the aggregate above 3mm and the mixing time of adding powder below 3mm are not less than 3min, but the mixing time cannot exceed Long, so as not to affect the production rhythm.

[005...

Embodiment 1

[0062] The raw materials are weighed according to the following proportions through the automatic batching system: 5<particle size≤10mm burnt gemstone 20%, particle size 3<particle size≤5mm burnt gemstone 15%, 1<particle size≤3mm burnt gemstone 10%, 0<particle size≤ 2mm fused mullite 10%, fused mullite with a particle size of -180 mesh 15%, super bauxite powder 8%, microsilica powder 4%, α-aluminum oxide powder 8%, Seka 71 aluminate Calcium cement 6%, Guangxi white clay 4%; add 0.2% sodium hexametaphosphate, explosion-proof fiber 0.03%, stainless steel fiber 0.5%.

[0063] The weighed raw materials are transported to the mixer by the batching trolley according to the existing aggregate of 3 mm or more, and then mixed and stirred for 3 minutes, and then the powder below 3 mm and the additional raw materials are transported to the mixer by the batching trolley for 3 minutes. After the mixing is completed, use The automatic quantitative packaging machine is used for packaging, an...

Embodiment 2

[0073] The raw materials are weighed according to the following proportions through the automatic batching system: 5<particle size≤10mm burnt gemstone 23%, 3<particle size≤5mm burnt gemstone 22%, 1<particle size≤3mm burnt gemstone 15%, 0<particle size≤2mm electric 15% fused mullite, 11% fused mullite with a particle size of -180 mesh, 3% super-grade bauxite powder, 2% microsilica powder, 3% α-alumina micropowder, Seka 71 calcium aluminate cement 4%, Guangxi white clay 2%; additionally add 0.2% sodium hexametaphosphate, 0.03% explosion-proof fiber, 1% stainless steel fiber.

[0074] The weighed raw materials are transported to the mixer by the batching trolley according to the existing aggregate of 3 mm or more, and then mixed and stirred for 3 minutes, and then the powder below 3 mm and the additional raw materials are transported to the mixer by the batching trolley for 3 minutes. After the mixing is completed, use The automatic quantitative packaging machine is used for pack...

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Abstract

The invention belongs to the technical field of loosened refractory materials, and in particular relates to a castable for a steel ladle heater burner and a preparation method thereof. To solve the technical problem, the invention provides a technical scheme of providing a castable for a durable steel ladle heater burner. The castable for the durable steel ladle heater burner is prepared from the following raw materials in percentage by weight in a mixed manner: 45-60% of hard clay, 20-30% of electro-fused mullite, 3-8% of super-grade alumina powder, 2-4% of silica fume, 3-8% of alpha-aluminum oxide micro powder, 4-6% of calcium aluminate cement and 2-4% of Guangxi white clay, and in addition sodium hexametaphosphate which accounts for 0.2% of the total weight of the raw materials, anti-explosive fiber which accounts for 0.03% of the total weight of the raw materials and stainless steel fiber which accounts for 0.5-1% of the total weight of the raw materials are added. The castable for the steel ladle heater burner, which is prepared from the formula of the invention is capable of very well repairing the burner, and has the advantages of being long in service life, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of bulk refractories, and in particular relates to a casting material for a burner of a ladle baker and a preparation method thereof. Background technique [0002] At present, the red bag tapping process is adopted in the steel smelting process at home and abroad, so it is necessary to use the ladle baker to bake the repaired ladle or the ladle to be used in the turnover, so as to ensure the service life of the ladle refractory and the steelmaking process the straight line. In the ladle roaster equipment, the firing nozzle (referred to as the burner) is the core component, and its service life directly affects the use of the ladle roaster and the process rhythm of steelmaking, and the burner is a component The medium refractory castable part is extremely vulnerable to damage, mainly because of its extremely harsh operating environment. First, the high temperature of the operating environment is 800-1200 ° C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66B22D41/015
CPCB22D41/015C04B35/66
Inventor 黄国炳张辉胡志豪陈超邓小兵
Owner GANGCHENG GRP LIANGSHAN RUIHAI IND
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