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Composite bonding wear-resistant castable refractory

A technology of refractory castables and refractory raw materials, which is applied in the field of wear-resistant refractory castables for high-temperature kiln engineering. It can solve the problems of loss of fluidity and condensation of castables, and achieve the effects of fast hardening, high strength, and improved wear resistance.

Inactive 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 the curing agent is added to the silica sol, it may coagulate rapidly, causing the castable to lose fluidity

Method used

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  • Composite bonding wear-resistant castable refractory
  • Composite bonding wear-resistant castable refractory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The weight ratio is: 5-1mm fused corundum 49%, 1-0.088mm fused corundum 14%, <0.088mm fused corundum 24%, alumina micropowder 3%, silica fume 6%, aluminate cement 4% , 2% heat-resistant steel fiber, 0.2% sodium hexametaphosphate, 0.05% citric acid, 4% silica sol with a concentration of 30%, and 3% water.

[0053] 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.

[0054] The obtained physical properties are: 110℃×24h drying: flexural strength 29.2MPa, compressive strength 173.3MPa, apparent porosity 7.1%, bulk density 3.35g / cm 3 ;1100℃×3h drying: flexural strength 25.9MPa, compressive strength 200.0MPa, apparent porosity 10.6%, bulk density 3.32g / cm 3 , line change -0.11%, abrasion resistance; 13...

Embodiment 2

[0057] The weight ratio is: 5-1mm fused corundum 48%, 1-0.088mm fused corundum 17%, <0.088mm fused corundum 23%, alumina micropowder 2%, silica fume 6%, aluminate cement 4% , 3% of heat-resistant steel fiber, 0.2% of sodium hexametaphosphate, 0.05% of citric acid, 3% of silica sol with a concentration of 30%, and 3% of water.

[0058] 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.

[0059] The obtained physical properties are: 110℃×24h drying: flexural strength 30.0MPa, compressive strength 187.65MPa, apparent porosity 8.0%, bulk density 3.32g / cm 3 ;1100℃×3h drying: flexural strength 38.8MPa, compressive strength 211.2MPa, apparent porosity 10.5%, bulk density 3.32g / cm 3 , line change -0.15%, abrasio...

Embodiment 3

[0062] The weight ratio is: 5-1mm high-bauxite 53%, 1-0.088mm high-bauxite 14%, <0.088mm high-bauxite 21%, alumina micropowder 5%, silica fume 3%, aluminate 5% cement, 0% heat-resistant steel fiber, 0.2% sodium hexametaphosphate, 0.02% citric acid, 2.5% silica sol with a concentration of 40%, and 4% water.

[0063] 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.

[0064] The obtained physical properties are: 110℃×24h drying: flexural strength 16.3MPa, compressive strength 117.6MPa, apparent porosity 8.5%, bulk density 2.85g / cm 3 ;1100℃×3h drying: flexural strength 25.1MPa, compressive strength 193.0MPa, apparent porosity 12.6%, bulk density 2.90g / cm 3 , line change -0.21%, abrasion resistance; 1350℃×3...

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Abstract

The invention relates to a composite bonding wear-resistant castable refractory, which can be used for high-temperature kiln engineering. The amorphous castable refractory which is normal in coagulation, quick in hardening, low in porosity, high in strength and high in abrasive resistance is prepared from silica sol serving as a bonding agent, aluminate cement serving as a curing agent, alumina micro powder and wollastonite which serve as a compact agent, heat resistant steel filters serving as a reinforcing agent and corundum and alumina which serve as an aggregate. The composite bonding wear-resistant castable refractory is suitable for positions such as air pipeline elbows for the cogeneration of cement kilns, cyclone cones and linings for triple air pipe gates which are easy to wear in high-temperature kilns.

Description

technical field [0001] The present invention relates to an unshaped refractory material, specifically, the present invention relates to a wear-resistant refractory castable for high-temperature kiln engineering, which can be used in high-temperature kiln parts that are easy to wear, such as airflow pipe elbows and cyclones for power generation by waste heat in cement kilns Lining materials for cones and tertiary air duct gates. Background technique [0002] At present, cement-bonded monolithic refractories use 5-1mm particles as coarse aggregate, 1-0.088mm particles as fine aggregate, <0.088mm particles as fine powder, and <0.010mm as fine powder. Generally, coarse aggregate occupies most of the space of the material, fine aggregate fills the gap of coarse aggregate, fine powder fills the gap of coarse and fine aggregate, and fine powder fills the gap of aggregate and powder. Thus, a so-called "close packed" structure is formed. [0003] The aforementioned "close pac...

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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