Composite castable refractory

A technology of refractory castables and castables, applied in the field of refractory and high temperature resistant materials, can solve the problems of uncontrollable coagulation of silica sol and achieve good fluidity

Active Publication Date: 2012-06-13
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If simply adding aluminate cement to solidify, the silica sol will coagulate uncontrollably, so that it cannot be formed into a dense lining

Method used

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  • Composite castable refractory
  • Composite castable refractory
  • Composite castable refractory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Test body weight ratio:

[0060] 5-1mm fused corundum 53%, 1-0.088mm fused corundum 9%, 1-0.088mm silicon carbide 5%, <0.088mm fused corundum 17%, <0.088mm silicon carbide 5%; alumina powder 5% , silica fume 4%, pure aluminate cement 2%; sodium hexametaphosphate 0.2%, citric acid 0.02%, silica sol with a concentration of 30% 4%, water 3%.

[0061] (2) Preparation of test body:

[0062] According to the above ratio, the solid raw materials are weighed and blended, and then poured into the mixer; then the specified silica sol and water are added, and the test body is made after stirring, pouring, transportation, pouring, vibration, demoulding, and curing. Physical properties were tested after heat treatment.

[0063] (3) Physical performance test:

[0064] The initial setting time of the castable is about 40 minutes, and the demoulding time is about 6 hours. The measured physical properties are:

[0065] 110℃×24h drying: flexural strength 11.0MPa, compressive stre...

Embodiment 2

[0070] (1) Test body weight ratio:

[0071] 5-1mm fused corundum 53%, 1-0.088mm fused corundum 4%, 1-0.088mm silicon carbide 10%, <0.088mm fused corundum 21%; alumina micropowder 5%, silica fume 4%, pure aluminum 3% salt cement; 0.2% sodium hexametaphosphate, 0.02% tartaric acid, 3% silica sol with a concentration of 30%, and 3% water.

[0072] (2) Preparation of test body:

[0073] According to the above ratio, the solid raw materials are weighed and blended, and then poured into the mixer; then the specified silica sol and water are added, and the test body is made after stirring, pouring, transportation, pouring, vibration, demoulding, and curing. Physical properties were tested after heat treatment.

[0074] (3) Physical performance test:

[0075] The initial setting time of the castable is about 40 minutes, and the demoulding time is about 6 hours. The measured physical properties are:

[0076] 110℃×24h drying: flexural strength 15.8MPa, compressive strength 112.7MPa,...

Embodiment 3

[0081] (1) Test body weight ratio:

[0082] 5-1mm high bauxite 53%, 1-0.088mm high bauxite 10%, 1-0.088mm mullite 4%, <0.088mm high bauxite 21%; alumina micropowder 5%, silica fume 3.5 %, 3.5% of pure aluminate cement; 0.2% of sodium hexametaphosphate, 0.02% of citric acid, 3% of silica sol with a concentration of 40%, and 4% of water.

[0083] (2) Preparation of test body:

[0084] According to the above ratio, the solid raw materials are weighed and blended, and then poured into the mixer; then the specified silica sol and water are added, and the test body is made after stirring, pouring, transportation, pouring, vibration, demoulding, and curing. Physical properties were tested after heat treatment.

[0085] (3) Physical performance test:

[0086] The initial setting time of the castable is about 40 minutes, and the demoulding time is about 6 hours. The measured physical properties are:

[0087] 110℃×24h drying: flexural strength 15.3MPa, compressive strength 110.3MPa,...

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Abstract

The invention relates to a composite castable refractory. The composite castable refractory comprises adamantine spar or / and alumina, mullite and silicon carbide which serve as granules, cement, alumina micro powder and wollastonite which serve as matrixes, a phosphate deflocculant, an organic acid retarder, diluted silica sol and water. A preparation method comprises the following steps of: weighing solid raw materials according to the amount of a formula, blending, and pouring the mixture into a stirrer; adding the silica sol and the water according to the amount of the formula; and stirring, dumping, conveying, pouring, vibrating, demolding, conserving and baking to prepare the composite castable refractory. The composite castable refractory is normal in coagulation and quick in hardening, has the excellent performance of high purity, high-temperature resistance, low air holes and erosion resistance, and is suitable for linings at the positions with the requirements of high-temperature resistance, erosion resistance or high-temperature abrasion resistance in high-temperature kiln furnaces.

Description

technical field [0001] The invention relates to refractory and high temperature resistant materials, in particular to a composite refractory castable. Background technique [0002] Refractory castables (also known as high-temperature-resistant castables) are granular and powdery materials made of refractory / high-temperature resistant substances, and are composed of a certain amount of binder and moisture. It has high fluidity, is suitable for pouring construction, and is an unshaped refractory material that can be hardened without heating. Generally, it is poured, vibrated or tamped at the site of use, and it can also be made into prefabricated parts. Refractory castables are the main varieties of unshaped refractory materials. [0003] Cement, powdery hydraulic inorganic gelling material. Add water and stir to form a slurry, which can be hardened in the air or better hardened in water, and can firmly bond sand, stone and other materials together. As an important cementin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66F27D1/00
Inventor 张金龙李存弼王杰曾周键董舜杰
Owner ANHUI RUITAI NEW MATERIALS TECH
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