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Composite bonding low-temperature constructional castable refractory

A technology of refractory castables and refractory raw materials, which is applied in the field of compound combined low-temperature construction refractory castables, can solve the problems of slow hardening and low strength of castables, and achieve the effect of improving slow hardening

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

Therefore, the castable hardens slowly and has low strength

Method used

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  • Composite bonding low-temperature constructional castable refractory
  • Composite bonding low-temperature constructional castable refractory
  • Composite bonding low-temperature constructional castable refractory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The weight ratio is: 5-1mm fused corundum 53%, 1-0.088mm fused corundum 9%, 1-0.088mm silicon carbide 5%, <0.088mm fused corundum 14%, <0.088mm silicon carbide 5%, 5% alumina micropowder, 4% silica fume, 5% aluminate cement, 0.2% sodium hexametaphosphate, 0.02% citric acid, 4% silica sol with a concentration of 30%, and 3% water.

[0057] 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. When curing at about 5°C, the demoulding time of the castable is about 20 hours.

[0058] The measured physical properties are: 110℃×24h drying: flexural strength 10.1MPa, compressive strength 61.3MPa; 1100℃×3h drying: flexural strength 16.9MPa, compressive strength 156.1MPa, line change -0.12%; 1350℃ ×3h drying:...

Embodiment 2

[0061] The weight ratio is: 5-1mm high bauxite 50%, 1-0.088mm high bauxite 13%, 1-0.088mm mullite 4%, <0.088mm high bauxite 18%, alumina micropowder 5 %, silica fume 3%, aluminate cement 7%, sodium hexametaphosphate 0.2%, citric acid 0.01%, silica sol with a concentration of 40% 4%, water 4%.

[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. When curing at about 5°C, the initial setting time of the castable and the demoulding time are about 14 hours.

[0063] The measured physical properties are: 110℃×24h drying: flexural strength 13.3MPa, compressive strength 105.3MPa; 1100℃×3h drying: flexural strength 18.2MPa, compressive strength 130.0MPa, line change -0.18%; 1350℃ ×3h drying: flexural stre...

Embodiment 3

[0066] The weight ratio is: 5-1mm fused corundum 43%, 1-0.088mm high alumina bauxite 5%, 1-0.088mm silicon carbide 10%, 1-0.088mm mullite 10%, <0.088mm fused corundum 10%, <0.088mm silicon carbide 10%, alumina micropowder 2%, silica fume 6%, aluminate cement 4%, sodium pyrophosphate 0.1%, tartaric acid 0.05%, silica sol with a concentration of 25% 6%, water 1%.

[0067] 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. When curing at about 5°C, the demoulding time of the castable is about 20 hours.

[0068]The measured physical properties are: 110℃×24h drying: flexural strength 10.5MPa, compressive strength 62.3MPa; 1100℃×3h drying: flexural strength 17.0MPa, compressive strength 158.2MPa, line change -...

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Abstract

The invention relates to a composite bonding low-temperature constructional castable refractory, which can be used for high-temperature kiln engineering. According to the castable refractory, corundum, alumina, mullite and silicon carbide are used as an aggregate, silica sol is used as a bonding agent, aluminate cement is used as a curing agent and a bonding aid, and alumina micro powder, wollastonite, a deflocculant, a retarder, water and the like are added. The composite bonding low-temperature constructional castable refractory has high low-temperature constructional performance, high performance of high-temperature resistance, erosion resistance, thermal shock resistance and high mechanical performance, and meets the requirements of overhauling in winter on the premise that the service life of the castable refractory is not influenced.

Description

technical field [0001] The present invention relates to an unshaped refractory material, in particular, the present invention relates to a low-cement composite combined low-temperature construction refractory castable for high-temperature kiln engineering, which uses corundum, bauxite, mullite and silicon carbide as aggregates. Silica sol is used as a binder, aluminate cement is used as a curing agent, and alumina micropowder, silica fume, silicon carbide, etc. are added to obtain a refractory castable with good low-temperature construction performance to meet the needs of high-temperature kiln maintenance in winter. Background technique [0002] Refractories refer to a class of inorganic non-metallic materials with a refractoriness not lower than 1580°C. Refractoriness refers to the Celsius temperature at which a refractory conical sample can resist high temperature without softening and melting without load. Refractory materials are widely used in metallurgy, chemical ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
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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