Preparation method of slag line magnesia carbon brick for steel ladle

A technology of magnesia-carbon bricks and slag lines, which is applied in the field of iron and steel metallurgy, can solve the problems of reduced peeling resistance of magnesia-carbon bricks, and achieve the effects of improving high-temperature strength and thermal shock resistance, reducing consumption costs, and improving thermal shock resistance

Inactive Publication Date: 2014-05-14
WUXI CHENGBO SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for preparing slag-line magnesia-carbon bricks for ladles. The magnesia-carbon bricks prepared by the method can reduce the carburization of molten steel during the use of ladle slag-line magnesia-carbon bricks, and at the same time solve the problems caused by the reduction of carbon content. The spalling resistance of magnesia carbon brick products is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of magnesia-carbon brick with slag wire for ladle, the magnesia-carbon brick is composed of the following raw materials in parts by weight: 28 parts of 5-20 mesh low-silicon fused magnesia, 20-50 mesh low-silicon fused magnesia 26 parts, 8 parts of 50-200 mesh low silicon fused magnesia, 3 parts of -200 mesh low silicon fused magnesia, 0.8 parts of -20 mesh graphite powder, 2 parts of -100 mesh zinc powder, 1 -100 mesh aluminum powder parts, 1 part of -200 mesh boron nitride, 0.5 part of -200 mesh boron carbide, 2 parts of -200 mesh cerium oxide, 0.5 part of pitch powder, and 4.5 parts of phenolic resin. The preparation method includes the following steps: 1) 5- 20-mesh low-silicon fused magnesia, 20-50-mesh low-silicon fused magnesia, 50-200-mesh low-silicon fused magnesia, and -200-mesh low-silicon fused magnesia were put into the mixer and mixed for 30 minutes;

[0023] 2) Add -20 mesh graphite powder, -100 mesh zinc powder, -100 mesh aluminum po...

Embodiment 2

[0027] A preparation method of magnesia-carbon brick with slag wire for ladle, the magnesia-carbon brick is composed of the following raw materials in parts by weight: 32 parts of 5-20 mesh low-silicon fused magnesia, 20-50 mesh low-silicon fused magnesia 22 parts, 50-200 mesh low silicon fused magnesia 12 parts, -200 mesh low silicon fused magnesia 1 part, -20 mesh graphite powder 1.2 parts, -100 mesh zinc powder 1 part, -100 mesh aluminum powder 2 parts, 0.5 parts of -200 mesh boron nitride, 1 part of -200 mesh boron carbide, 1 part of -200 mesh cerium oxide, 1.5 parts of pitch powder, and 3.5 parts of phenolic resin. The preparation method includes the following steps:

[0028] 1) Put 5-20 mesh low silicon fused magnesia, 20-50 mesh low silicon fused magnesia, 50-200 mesh low silicon fused magnesia, -200 mesh low silicon fused magnesia into the mixer Mix in medium for 40 minutes;

[0029] 2) Add -20 mesh graphite powder, -100 mesh zinc powder, -100 mesh aluminum powder, -2...

Embodiment 3

[0033] A preparation method of magnesia-carbon brick with slag wire for ladle, the magnesia-carbon brick is composed of the following raw materials in parts by weight: 30 parts of 5-20 mesh low-silicon fused magnesia, 20-50 mesh low-silicon fused magnesia 24 parts, 10 parts of 50-200 mesh low silicon fused magnesia, 2 parts of -200 mesh low silicon fused magnesia, 1.0 parts of -20 mesh graphite powder, 1.5 parts of -100 mesh zinc powder, -100 mesh aluminum powder 1.5 parts parts, 0.8 parts of -200 mesh boron nitride, 0.8 parts of -200 mesh boron carbide, 1.5 parts of -200 mesh cerium oxide, 1 part of pitch powder, and 4 parts of phenolic resin. The preparation method includes the following steps:

[0034] 1) Put 5-20 mesh low silicon fused magnesia, 20-50 mesh low silicon fused magnesia, 50-200 mesh low silicon fused magnesia, -200 mesh low silicon fused magnesia into the mixer Mix in medium for 35 minutes;

[0035] 2) Add -20 mesh graphite powder, -100 mesh zinc powder, -100...

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Abstract

The invention discloses a preparation method of a slag line magnesia carbon brick for a steel ladle. The preparation method comprises the following steps: (1) placing 28-32 parts of 5-20-mesh low-silicon fused magnesia, 22-26 parts of 20-50-mesh low-silicon fused magnesia, 8-12 parts of 50-200-mesh low-silicon fused magnesia and 1-3 parts of -200-mesh low-silicon fused magnesia into a mixing machine to mix for 30-40min; (2) then, adding 0.8-1.2 parts of -20-mesh graphite powder, 1-2 parts of -100-mesh zinc powder, 1-2 parts of -100-mesh aluminum powder, 0.5-1 part of -200-mesh borne nitride, 0.5-1 part of -200-mesh boron carbide, 1-2 parts of -200-mesh cerium oxide and 0.5-1.5 parts of asphalt powder to mix for 60-90min; (3) next, adding 3.5-4.5 parts of phenolic resin to remix for 60-90min; (4) forming by using a press and drying a green brick at the temperature of 200 DEG C for 24h.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a preparation method of slag wire magnesia-carbon bricks for ladle. Background technique [0002] In the 21st century, the structure of iron and steel enterprises has been adjusted, and high-quality steel has become the leading product of large enterprises. For example, the proportion of high-quality alloy steel, ultra-low carbon steel, clean steel, high-strength steel, etc. It is required to strictly control the carbon content in the refractory material in order to reduce the carbonization of the molten steel, and in the secondary refining, the increase and decrease of the molten steel temperature should be small, and the thermal conductivity of the ladle lining should be low, which leads to the use conditions of the ladle. It is more demanding and the working environment is more severe, and there is an urgent need for the emergence of low-carbon magnesia-carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李飞
Owner WUXI CHENGBO SCI & TECH DEV
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