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Composite fire resistant pouring material

A technology of refractory castables and castables, applied in the field of advanced unshaped refractory materials, can solve the problems of toxic substances, low material strength, and materials that cannot withstand mechanical stress, etc., and achieve a good coagulation effect

Active Publication Date: 2009-05-20
RUITAI MATERIALS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, gel injection molding has brought new problems: 1) some monomers (such as acrylamide) are toxic substances, or produce toxic gases when burned
3) During heat treatment, when the organic bond is destroyed and the ceramic bond has not been formed, the strength of the material is low
Therefore, at this point the material cannot withstand mechanical stress
Therefore, gel injection molding can be used to manufacture refractory products in refractory factories, but it is difficult to use monolithic refractory technology for kiln projects with variable site conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Use 52% of 5-1mm plate-shaped sintered corundum, 1-0.088mm plate-shaped sintered corundum 20%, 0.6 = 1510°C.

[0042] Because the content of calcium oxide brought in by cement is only 0.1%, the product of the invention belongs to the composition range of cement-free refractory castables. The product has significantly better coagulation, hardening, demoulding, drying and heating properties than the existing cementless castables, and good high-temperature performance, and the experiment has fully achieved the intended purpose.

Embodiment 2

[0044] Use 5-1mm plate-shaped sintered corundum 42%, 1-0.088mm plate-shaped sintered corundum 27%, <0.088mm fused corundum 19%, alumina micropowder 3.5%, silica fume 2.5%, aluminum 80 cement 1.0%, water repellent Aluminum oxide 5%, plus 0.1% polycarboxylate superplasticizer, polyacrylic acid emulsion 3%, and water 3%, followed by mixing to obtain a slurry with good fluidity. After forming, the slurry coagulates in 0.5 hours, solidifies in 1 hour, and can be demolded within 12 hours. After drying at 110℃×24H, the sample obtained a flexural strength of 20MPa and a compressive strength of 75MPa. After heat treatment at 1100°C for 3 hours, the flexural strength of 18MPa and the compressive strength of 80MPa are obtained, and the change of firing line is 0.0%.

[0045] Because the content of calcium oxide brought in by cement is only 0.2%, the product of the invention belongs to the composition range of ultra-low cement refractory castables. This product has better properties of ...

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Abstract

The invention relates to an organic-inorganic composite combined advanced monolithic refractory which has the formula of 40 to 56 percent of 5-1mm corundum or bauxite, 12 to 30 percent of 1-0.0088mm corundum or bauxite, 16 to 25 percent of corundum or bauxite with d90 less than 0.088mm, 0 to 5 percent of alpha alumina micropowder, 1 to 8 percent of hydratable alumina, 1 to 6 percent of siliceous dust, 0 to 2 percent of calcium aluminate cement, 0.05 to 0.4 percent of external efficient water reducing agents (polycarboxylic acid plus sulfonation naphthaldehyde polymer plus sulfonation melamine polymer), 1 to 6 percent of latex of the system of external polyacrylic acid, 1 to 6 percent of external water and 0 to 3 percent of external heat-resistant steel fiber. Casting materials of the invention have excellent performances of condensation, hardening, demoulding, drying and heating and are suitable for high-temperature furnace projects with changeful field conditions.

Description

technical field [0001] The invention relates to a high-grade unshaped refractory material combined with organic-inorganic compound. At room temperature, mainly rely on the reaction of polyacrylic acid emulsion and inorganic substances such as hydratable alumina to form polyacrylic acid aluminum (calcium), quickly and controllably form a three-dimensional cross-linked structure, so as to obtain good coagulation, hardening, demoulding and drying performance. At high temperature, it mainly relies on the reaction of silica fume and alumina to form mullite and sinters to form a stable ceramic bond, so as to obtain good high temperature resistance. Background technique [0002] Unshaped refractories have been widely used. Among them, low-cement and ultra-low-cement refractory castables are the main types of amorphous materials. According to ASTM regulations: CaO content of low cement castables = 2.5~1.0%; CaO content of ultra-low cement castables = 1.0~0.2%; CaO content of no c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 曾大凡王杰曾叶亚红刘锡俊王俊涛赵洪亮
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
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