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Refractory material containing barium oxide

A technology of refractory materials and alumina, applied in the field of refractory materials, can solve problems such as low bonding strength, increased water demand of hydratable alumina, and easy bursting

Active Publication Date: 2005-03-09
RUITAI MATERIALS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main disadvantages of hydratable alumina are increased water demand for forming, slow hardening, low bonding strength, and easy bursting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using barium carbonate and industrial alumina as raw materials, the raw material is prepared according to the ratio of 197.35:101.96. After mixing, grinding, kneading, forming and drying by conventional processes, the clinker is obtained by calcining at 1500°C for 4 hours, and then finely Grinding barium aluminate cement. X-ray examination showed that the cement contained only BA, and the content of other substances was less than the detection limit.

[0022] The proportion of refractory mud is:

[0023] <0.088mm fused corundum 50%;

[0024] 20% of the aforementioned BA cement;

[0025] Aluminum oxide powder 20%;

[0026] Silica fume 10%;

[0027] Add 3% retarder tartaric acid.

[0028] After the sample is mixed with water at 7°C, it can be formed for about 1 hour, and can be demoulded after 2.5 hours. After curing for 6 hours, the sample is treated at 110°C for 6 hours, and the compressive strength is 144Mpa. After adding the coagulant, the refractory mud made of c...

Embodiment 2

[0030] Prepare cement by the method for embodiment column 1. The proportion of refractory concrete is:

[0031] 5-1mm fused corundum 50%;

[0032] 1-0.088mm fused corundum 20%;

[0033] 30% of the prepared refractory powder according to embodiment 1.

[0034] The samples were formed, cured and dried according to the method in Example 1, and then heat-treated at different temperatures. The performance of the trial product is as follows:

[0035] Heat treatment conditions Flexural strength Mpa Compressive strength Mpa Linear change %

[0036] 110℃×24H 19.8 139

[0037] 1100℃×3H 17.4 113 0.04

[0038] 1500℃×3H 27.7 155 -0.02

[0039] After heat treatment at 1500℃×3H, the softening temperature under load is 1570℃.

[0040] After heat treatment at 1500℃×3H, the flexural strength retention rate after forced air cooling at 1100℃ for 3 times is 84%.

[0041] The comparison sample of ultra-low calcium aluminate cement corundum castable not only has a higher rate of line change...

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Abstract

A refractory with high high-temp and heat shock resistance and high solidifying speed is prepared from barium aluminate cement, aluminium oxide powder, silicon oxide powder and mullite powder.

Description

technical field [0001] The invention relates to a refractory material cured by barium aluminate cement. The chemical characteristic of this type of material is that it contains barium oxide, and its performance has the characteristics of normal condensation, fast hardening speed, good low temperature construction performance, high fire resistance and excellent thermal shock resistance. The invented material is suitable for rapid construction, low temperature construction, large or special-shaped products, and occasions with high performance requirements. Background technique [0002] Over the past 20 years, monolithic refractories have made great progress. The amount of unshaped materials in developed countries has reached 50% of the total refractory materials. Some shaped materials are also produced by the method of unshaped refractories. When the refractory material is difficult to be formed by pressure, it can be solidified with a small amount of pre-added curing agent...

Claims

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Application Information

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IPC IPC(8): C04B35/18C04B35/185C04B35/443C04B35/63C04B35/66
Inventor 王杰曾王晓红曾鲁举袁林李艳
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
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