High-strength and light refractory aggregate

A refractory aggregate and high-strength technology, applied in the field of refractory materials, can solve the problems of low strength and water resistance, and achieve the effect of high strength, good water resistance and improved quality

Active Publication Date: 2016-02-03
无锡市宜刚耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found in practice that its strength is still low, and the common problem of magnesia-aluminum spinel lightweight refractory aggregates - water resistance has not been resolved

Method used

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  • High-strength and light refractory aggregate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Production process of high-strength lightweight refractory aggregate:

[0023] (1) Preparation of mud:

[0024] According to parts by weight, 60 parts of alumina (particle size 3 μm), 18 parts of fused magnesia (particle size 9 μm), 0.5 parts of α-Al with a mass fraction of 99.9% 2 o 3 Nano powder (250nm in particle size), 0.5 part of perlite powder (20 μm in particle size), 0.9 part of sapphire powder (15 μm in particle size), 0.2 part of sericite (2 μm in particle size) as the main raw materials, after uniform ball milling, keep the temperature At 15°C, continue to add 25 parts of Suzhou clay, 1.1 parts of SDBS foaming agent, 0.5 parts of sodium tripolyphosphate, and 6 parts of dextrin and continue to stir to make a mixed mud;

[0025] (2) Sintering molding

[0026] The prepared mud is poured into a mold of 20mm×20mm×20mm, and the mold is demoulded after natural drying. The dried wet billet is fired in an electric furnace. The firing is divided into 3 steps:

[00...

Embodiment 2

[0031] Production process of high-strength lightweight refractory aggregate:

[0032] (1) Preparation of mud:

[0033] According to parts by weight, 62 parts of alumina (particle size 2 μm), 20 parts of fused magnesia (particle size 5 μm), 0.8 parts of α-Al with a mass fraction of 99.9% 2 o 3 Nano powder (200nm in particle size), 0.5 part of perlite powder (25 μm in particle size), 0.6 part of perlite powder (20 μm in particle size), 0.2 part of sericite (2 μm in particle size) as the main raw materials, after uniform ball milling, keep the temperature At 15°C, continue to add 25 parts of Suzhou clay, 0.8 parts of SDBS foaming agent, 0.5 parts of sodium tripolyphosphate, and 6.5 parts of dextrin and continue to stir evenly to obtain a mixed mud;

[0034] (2) Sintering molding

[0035] The prepared mud is poured into a mold of 20mm×20mm×20mm, and the mold is demoulded after natural drying. The dried wet billet is fired in an electric furnace. The firing is divided into 3 ste...

Embodiment 3

[0040] Production process of high-strength lightweight refractory aggregate:

[0041] (1) Preparation of mud:

[0042] According to parts by weight, 61 parts of alumina (particle size 3 μm), 19 parts of fused magnesia (particle size 8 μm), 0.6 parts of α-Al with a mass fraction of 99.9% 2 o 3 Nano-powder (particle size 240nm), 0.5 part of perlite powder (particle size 21 μm), 0.8 part of perlite powder (particle size 16 μm), 0.2 part of sericite (particle size 2 μm) as the main raw materials, after uniform ball milling, keep the temperature At 15°C, continue to add 25 parts of Suzhou clay, 1.0 parts of SDBS foaming agent, 0.5 parts of sodium tripolyphosphate, and 6.1 parts of dextrin and continue to stir evenly to obtain a mixed mud;

[0043] (2) Sintering molding

[0044] The prepared mud is poured into a mold of 20mm×20mm×20mm, and the mold is demoulded after natural drying. The dried wet billet is fired in an electric furnace. The firing is divided into 3 steps:

[0045...

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Abstract

The invention discloses a production process of high-strength and light refractory aggregate. The high-strength and light refractory aggregate is prepared from main raw materials including, by weight, 60-62 parts of aluminium oxide, 18-20 parts of fused magnesite, 0.5-0.8 part of alpha-Al2O3 nanometer powder with the mass fraction of 99.9%, 0.5 part of perlite micropowder, 0.6-0.9 part of stone micropowder and 0.2 part of sericite, the temperature is kept at 15 DEG C after the main raw materials are evenly ball-milled, 25 parts of Soochow clay, 0.8-1.1 parts of SDBS foaming agents, 0.5 part of sodium tripolyphosphate and 6-6.5 parts of dextrin continue to be added and continue to be evenly stirred to form mixed mud, the prepared mud is poured and formed in a mold, demolding is conducted after natural drying, a dried wet blank is sintered in an electric furnace, sintering is conducted in 3 steps, and the finished product is obtained through furnace cooling. The high-strength and light refractory aggregate is light in mass and high in porosity, strength and water resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a high-strength lightweight refractory aggregate and a preparation process thereof. Background technique [0002] Magnesium-aluminum spinel ceramics have the advantages of high melting point (2135°C), good chemical corrosion resistance, high strength, and small thermal expansion coefficient. They can be widely used in catalyst carriers, sensors, and high-temperature industries. Especially in the field of refractory materials, magnesia-alumina spinel ceramics can be used for high-strength hot-face refractory materials, side walls of ladles, and lattice bodies in regenerators of glass melting furnaces. With the continuous improvement of energy-saving and environmental protection requirements, lightweight magnesium-aluminum spinel refractory materials with high strength, corrosion resistance, thermal insulation and triple functions have attracted much attent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/101C04B38/02
Inventor 朱晓明
Owner 无锡市宜刚耐火材料有限公司
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