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A submerged nozzle body material

A bulk material, immersion technology, applied in the field of refractory materials, can solve the problems of high energy consumption, environmental pollution, and high production costs, and achieve the effects of low energy consumption, reduced manufacturing costs, and low costs

Active Publication Date: 2016-05-04
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, corundum needs to be smelted in an electric arc furnace, which has high production costs, high energy consumption, and serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A submerged nozzle body material, including the following components by weight: 70g of mullite powder, 6g of corundum powder, 15g of graphite powder, 0.5g of elemental silicon powder, 0.5g of silicon carbide powder and 8g of phenolic resin,

[0027] Among them, the particle size of mullite powder is 100 mesh, the particle size of corundum powder is 24 mesh, the particle size of graphite powder is 50 mesh, and the particle size of elemental silicon powder, silicon carbide powder and boron carbide powder is 320 mesh.

[0028] The chemical composition of mullite powder includes: Al 2 o 3 : 68%, SiO 2 : 29%, Fe 2 o 3 ≤0.3%, the chemical composition of corundum powder includes: Al 2 o 3 95%, TiO 2 3%, SiO 2 2 o 3 2 O+K 2 O4 C95%.

[0029] The method for preparing the submerged nozzle body by using the above materials:

[0030] The first step is mixed grinding: mix mullite powder, corundum powder, elemental silicon powder, silicon carbide powder and boron carbide p...

Embodiment 2

[0036] A submerged nozzle body material, including the following components by weight: 70g of mullite powder, 15g of graphite powder, 1g of elemental silicon powder, 1g of silicon carbide powder, 1g of boron carbide and 12g of phenolic resin,

[0037] Among them, the particle size of mullite powder is 200 mesh, the particle size of corundum powder is 36 mesh, the particle size of graphite powder is 100 mesh, and the particle size of elemental silicon powder, silicon carbide powder and boron carbide powder is 320 mesh.

[0038] The chemical composition of mullite powder includes: Al 2 o 3 : 77%, SiO 2 : 25%, Fe 2 o 3 0.3%, the chemical composition of corundum powder includes: Al 2 o 3 96%, TiO 2 3.5%, SiO 2 2 o 3 2 O+K 2 O4 C95%.

[0039] The method for preparing the submerged nozzle body by using the above materials:

[0040] The first step is mixed grinding: mix mullite powder, corundum powder, elemental silicon powder, silicon carbide powder and boron carbide powd...

Embodiment 3

[0046]A submerged nozzle body material, including the following components by weight: 40g of mullite powder, 25g of corundum powder, 20g of graphite powder, 3g of elemental silicon powder, 1g of silicon carbide powder, 1g of boron carbide and 10g of phenolic resin,

[0047] Among them, the particle size of mullite powder is 200 mesh, the particle size of corundum powder is 80 mesh, the particle size of graphite powder is 100 mesh, and the particle size of elemental silicon powder, silicon carbide powder and boron carbide powder is 320 mesh.

[0048] The chemical composition of mullite powder includes: Al 2 o 3 : 68%, SiO 2 : 29%, Fe 2 o 3 ≤0.3%, the chemical composition of corundum powder includes: Al 2 o 3 95%, TiO 2 3%, SiO 2 2 o 3 2 O+K 2 O4 C95%.

[0049] The method for preparing the submerged nozzle body by using the above materials:

[0050] The first step is mixed grinding: mix mullite powder, corundum powder, elemental silicon powder, silicon carbide powder ...

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Abstract

The invention provides an immersed water port body material. The immersed water port body material comprises the following components in percentage by weight: 10-70 percent of mullite powder, 0-60 percent of alundum powder, 15-25 percent of graphite powder, 0.5-3 percent of monatomic silicon powder, 0.5-3 percent of silicon carbide powder, 0-1 percent of boron carbide powder and 8-12 percent of a bonding agent. A method for making an immersed water port body by using the material comprises the following steps: I, mixing and grinding: uniformly mixing the mullite powder, the alundum powder, the monatomic silicon powder, the silicon carbide powder and the boron carbide powder, and grinding the mixture; II, pelletizing: slowly adding the bonding agent into the mixture for pelletizing; III, drying and molding: drying particles prepared in the previous step, and molding the dry particles by adopting an isostatic pressing machine; and IV, sintering treatment: sintering the product prepared in the previous step at a high temperature and in a reducing atmosphere, and performing machining surface treatment and drying. The immersed water port body material provided by the invention has the advantages of high thermal stability, high temperature resistance, molten steel erosion resistance and high mechanical strength.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a submerged nozzle body material. Background technique [0002] The submerged nozzle is a refractory casing for pouring that is installed at the bottom of the tundish for continuous steel casting equipment and inserted below the molten steel surface of the mold. The main function is to prevent the secondary oxidation of the tundish injection and the splashing of molten steel; prevent the mold powder from being involved in the molten steel; improve the flow state and heat flow distribution of the injection in the mold, and thus promote the uniformity of the shell in the mold Growth, which is conducive to the removal of gases and inclusions in steel. Because the submerged nozzle has remarkable effects on improving the quality of the slab, improving the working conditions, stabilizing the continuous casting operation, and preventing the surface defects of the slab. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 王晓东王次明鄢凤明田海玉刘丽李朝云牛俊高郝不景赵继增任林刘全超胡玲军赵冉
Owner 北京利尔高温材料股份有限公司
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