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A kind of aluminum-silicon carbide anhydrous press-in mud and its preparation method

A technology without hydraulic pressure and siliconization, which is applied in the field of refractory materials, can solve the problems of carbon brick and SiC brick chemical erosion, water cannot be discharged, etc., and achieve the effect of improving fluidity, reducing maintenance frequency and increasing production

Active Publication Date: 2015-10-28
长兴南冶冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problem that the water-containing press-in material contains free water and crystal water, and the water cannot be discharged after baking, resulting in the formation of steam at high temperature. Carbon bricks and SiC bricks produce large chemical erosion defects, invent an aluminum carbon (silicon carbide) anhydrous press-in mud and its production method

Method used

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation process of anhydrous press-in mud is different from the traditional process, and the high-temperature firing process is changed to a low-temperature treatment at a low temperature of 180°C-200°C. Save energy and make it self-sintering at the high temperature used.

[0033] The process of preparation: raw materials entering the factory—inspection—crushing—sieving—inspection—ingredients—mixing materials—pressing and conveying by a pulper—natural drying—low temperature treatment—self-sintering at high temperature during use.

Embodiment 1

[0035] Aggregate: 40 parts of cement, 40 parts of 85% grade bauxite, matrix: 8 parts of silicon micropowder, 20 parts of silicon carbide, 1 part of metal aluminum powder, and mix evenly. During construction, add binder liquid into a special mixer 40 parts of phenolic resin, 0.4 parts of sodium tripolyphosphate as a dispersant, and 0.2 parts of hexamethylenetetramine as a curing agent. 2 o 3 : ≥50(wt)%; C+SiC≥1.6(wt)%. Use a grouting machine to transport the mud to the maintenance area under pressure, and press it in continuously to achieve the sealing effect.

Embodiment 2

[0037] Aggregate: 40 parts of cement, 50 parts of 95% grade brown corundum, matrix: 8 parts of bonded clay fine powder, 10 parts of silicon carbide, 2 parts of metal aluminum powder, and mix evenly. 40 parts of liquid phenolic resin, 0.5 parts of sodium tripolyphosphate as a dispersant, and 0.3 parts of hexamethylenetetramine as a curing agent. 2 o 3 : ≥50(wt)%; C+SiC≥1.6(wt)%. Use a grouting machine to transport the mud to the maintenance area under pressure, and press it in continuously to achieve the sealing effect.

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PUM

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Abstract

The invention relates to an aluminum carbonized siliceous anhydrous press-in mud, which is composed of aggregate, matrix, metal aluminum powder, binder and additives. Aggregate: 30-50 parts of cement, 30-50 parts of granular material, matrix: Microsilica powder and / or bonded clay fine powder 5-10 parts, silicon carbide 10-20 parts, metal aluminum powder: 1-5 parts, additive: 0.5-1 part, binder: liquid resin 35-45 parts. Mix the aggregate, matrix material, and metal aluminum powder evenly. During construction, add binders and additives to the mixer, mix evenly, and use the grouting machine to transport the mud to the maintenance area under pressure, and press it continuously. , to achieve the sealing effect. Using liquid phenolic resin as a binder, its main technical feature is high residual carbon, and the combined press-in mud has anhydrous performance, and can be constructed at high temperature to meet rapid baking. At the same time, it forms a carbon chain after being heated, so that the material forms a Overall, the shrinkage is small, and no gap will be formed between the cooling wall and the carbon brick. Due to the introduction of carbon, the thermal conductivity of the material can be improved, which can effectively reduce the temperature of the carbon brick.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an aluminum-silicon carbide anhydrous press-in mud and a preparation method thereof. Background technique [0002] With the continuous development of blast furnace production technology and continuous improvement of furnace service life, the maintenance of blast furnace body, especially the maintenance in the middle and late stages, is becoming more and more important. The traditional water-containing pressing materials contain free water and crystal water, and the water cannot be discharged after baking, resulting in the formation of steam at high temperature, which has a greater chemical erosion effect on carbon bricks and SiC bricks. In order to prevent chemical erosion and gas leakage in high-temperature furnaces such as blast furnaces and heating furnaces, the mud is pressed into the non-aqueous system to seal to prevent gas leakage. [0003] In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 吴国强侯兆田胡竹生杨利强杨宗平
Owner 长兴南冶冶金材料有限公司