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Refractory castable for blast furnace tapping trench and preparation method thereof

A technology for refractory castables and blast furnace tapping, which is applied in the field of preparation of refractory castables for blast furnace tapping trenches, can solve the problems of long construction period, large energy consumption, short service life, etc. Strength, effect of increasing sinterability

Inactive Publication Date: 2019-02-01
洛阳润昌窑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of castable is not only costly, but also has a short life, and it needs to be baked for a long time, resulting in a long construction period and large energy consumption. Therefore, it is urgent to develop a long-life and energy-saving refractory castable for iron troughs.

Method used

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  • Refractory castable for blast furnace tapping trench and preparation method thereof
  • Refractory castable for blast furnace tapping trench and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] First, premix A of fused white corundum powder, silicon carbide powder, silicon micropowder, calcined alumina powder, pure calcium aluminate cement and metal silicon powder; spherical asphalt, high-efficiency anti-explosion agent and high-efficiency dispersant are prefabricated into mixture B , Shanxi high-quality high-alumina bauxite and electric fused brown corundum of two particle sizes are prefabricated into coarse aggregate C in a mixer and stirred evenly, and materials A, B and C are packaged separately. When preparing castables, add premix A and premix B to material C and add them to a forced mixer for dry mixing. When stirring, add high-efficiency water reducer and stir evenly, then put them into a large bag to obtain dry refractory castables; Pour the dry material into the mixer, add tap water at room temperature while stirring, and mix well. After mixing evenly, it can be poured into a shape, and then it can be put into use after curing, demoulding, and rapid b...

Embodiment 2

[0057] First, premix A of fused white corundum powder, silicon carbide powder, silicon micropowder, calcined alumina powder, pure calcium aluminate cement and metal silicon powder; spherical asphalt, high-efficiency anti-explosion agent and high-efficiency dispersant are prefabricated into mixture B , Shanxi high-quality high-alumina bauxite and electric fused brown corundum of two particle sizes are prefabricated into coarse aggregate C in a mixer and stirred evenly, and materials A, B and C are packaged separately. When preparing castables, add premix A and premix B to material C and add them to a forced mixer for dry mixing. When stirring, add high-efficiency water reducer and stir evenly, then put them into a large bag to obtain dry refractory castables; Pour the dry material into the mixer, add tap water at room temperature while stirring, and mix well. After mixing evenly, it can be poured into a shape, and then it can be put into use after curing, demoulding, and rapid b...

Embodiment 3

[0074] First, premix A of fused white corundum powder, silicon carbide powder, silicon micropowder, calcined alumina powder, pure calcium aluminate cement and metal silicon powder; spherical asphalt, high-efficiency anti-explosion agent and high-efficiency dispersant are prefabricated into mixture B , Shanxi high-quality high-alumina bauxite and electric fused brown corundum of two particle sizes are prefabricated into coarse aggregate C in a mixer and stirred evenly, and materials A, B and C are packaged separately. When preparing castables, add premix A and premix B to material C and add them to a forced mixer for dry mixing. When stirring, add high-efficiency water reducer and stir evenly, then put them into a large bag to obtain dry refractory castables; Pour the dry material into the mixer, add tap water at room temperature while stirring, and mix well. After mixing evenly, it can be poured into a shape, and then it can be put into use after curing, demoulding, and rapid b...

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Abstract

The invention discloses method of preparing a refractory castable used for large blast furnace iron runners, and the refractory castable has the advantages of green environmental protection, energy saving and emission reduction, good construction performance, high strength, high temperature volume stability, thermal shock stability and slag corrosion resistance. The method adopts Shanxi high-quality high bauxite (Al2O3 is greater than equal to 88%), fused brown corundum, fused white corundum and 97 silicon carbide as main raw materials, and high bauxite and fused brown corundum are composed ofcertain particles, fused white corundum powder, calcined alumina powder, 95 silicon micropowder, spherical asphalt, metal silicon powder and pure calcium aluminate cement are composition of a matrix,and an appropriate amount of an anti-explosive agent and a high-efficiency dispersant are added for the preparation. The calcined alumina powder used in the long-life environment-friendly tapping trench castable prepared by the method of the invention has uniform microstructure, high fineness, good sinterability and fluidity, and reacts with silicon oxide to form a high-temperature phase of mullite at high temperature, which improves the internal microstructure of the material and improves the thermal shock stability of the material.

Description

technical field [0001] The invention belongs to a method for preparing a refractory castable for a blast furnace tapping trough, in particular to a preparation method for a long-life and environment-friendly vibrating or self-flowing refractory castable for a large-scale blast furnace tapping trough. Background technique [0002] With the rapid development and continuous improvement of the metallurgical industry, various blast furnaces have adopted various technologies to continuously strengthen their own metallurgical processes in order to increase production. The working environment is getting worse and worse. Therefore, metallurgical industry for Al 2 o 3 -The performance of SiC-C iron channel castable has more stringent requirements. During the work, the castables of the iron trough are not only directly washed by high-temperature molten iron and slag, but also subjected to mechanical wear and chemical erosion, and are also affected by sudden drop and rise in temperat...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3418C04B2235/3826C04B2235/428C04B2235/448C04B2235/77C04B2235/96
Inventor 刘岩刘晨赵靓雯张洛林高彬罗浩
Owner 洛阳润昌窑业有限公司
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