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Refractory castable for blast furnace iron runner

A technology for refractory castables and iron trenches, which is applied in the field of refractory castables for blast furnace iron trenches, and can solve the problems of inability to form a whole, large shrinkage, and maintenance times of excessively long maintenance periods.

Inactive Publication Date: 2014-01-29
NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the service life of the blast furnace, improve the safety factor of the blast furnace, and avoid accidents, it is necessary to maintain the blast furnace regularly, and the excessively long maintenance cycle or too frequent maintenance times will affect the stable operation of the blast furnace, which is not conducive to the smooth production of the blast furnace Reach production
The traditional maintenance method needs to stop the furnace. After cooling the furnace, use the water system press-in material to fill the damaged part. Since the water-system press-in material needs to be baked for a long time, the efficiency is affected. At the same time, it shrinks greatly at high temperature and cannot form a whole. Generally, resulting in frequent maintenance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Anhydrous pressed mud for blast furnace, including aggregate, matrix, binder and additives; aggregate is composed of high alumina bauxite, silicon carbide and zircon, the amount of aggregate added is 45 parts, and the particle size is below 0.4mm; matrix It is composed of silicon micropowder and magnesia, and the addition amount of the matrix is ​​16 parts; the binder is liquid phenolic resin, and the addition amount of the binder is 35 parts; the additive is sodium hexametaphosphate, and the addition amount of the additive is 4 parts. Among them, the parts by weight of high alumina bauxite, silicon carbide and zircon in the aggregate are 30 parts of high alumina bauxite, 30 parts of silicon carbide, and 40 parts of zircon; the parts by weight of silicon micropowder and magnesium oxide in the matrix are silicon micropowder 50 parts, 50 parts of magnesium oxide.

Embodiment 2

[0014] Anhydrous pressed mud for blast furnace, including aggregate, matrix, binder and additives; aggregate is composed of high alumina bauxite, silicon carbide and zircon, the amount of aggregate added is 51 parts, and the particle size is below 0.4mm; matrix It is composed of silicon micropowder and magnesia, and the addition amount of the matrix is ​​15 parts; the binder is liquid phenolic resin, and the addition amount of the binder is 30 parts; the additive is sodium hexametaphosphate, and the addition amount of the additive is 4 parts. Among them, the parts by weight of high alumina bauxite, silicon carbide and zircon in the aggregate are 40 parts of high alumina bauxite, 40 parts of silicon carbide, and 20 parts of zircon; the parts by weight of silicon micropowder and magnesium oxide in the matrix are silicon micropowder 60 parts, 40 parts of magnesium oxide.

Embodiment 3

[0016] Anhydrous press-in mud for blast furnace, including aggregate, matrix, binder and additives; aggregate is composed of high alumina bauxite, silicon carbide and zircon, the amount of aggregate added is 55 parts, and the particle size is below 0.4mm; matrix It is composed of silicon micropowder and magnesia, and the addition amount of the matrix is ​​25 parts; the binder is liquid phenolic resin, and the addition amount of the binder is 18 parts; the additive is sodium hexametaphosphate, and the addition amount of the additive is 2 parts. Among them, the parts by weight of high alumina bauxite, silicon carbide and zircon in the aggregate are 40 parts of high alumina bauxite, 40 parts of silicon carbide, and 20 parts of zircon; the parts by weight of silicon micropowder and magnesium oxide in the matrix are silicon micropowder 70 parts, 30 parts of magnesium oxide.

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Abstract

The invention provides a refractory castable for a blast furnace iron runner. The refractory castable is composed of the following components in parts by weight: 40-50 parts of corundum, 8-12 parts of zircon, 8-30 parts of silicon carbide, 5-6 parts of magnesium oxide, 2-6 parts of silica fume, 1-5 parts of calcium aluminate cement, 1-3 parts of boron carbide, 0.2-0.3 part of sodium hexametaphosphate, 0.1-0.2 part of sodium polyacrylate, 3-5 parts of water and 1-10 parts of carbon black. The refractory castable for the blast furnace iron runner has good thermal shock resistance and slag resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory castable for a blast furnace iron trench. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, so they are widely used in the world. It has developed rapidly, and its proportion in the whole refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, France and other c...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 穆祥王西来董伟胜刘文艳解仁刘朝晖苏新国王淑娟
Owner NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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