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Water hardened aluminium oxide pouring material binding agent and preparation process thereof

A technology of alumina and hydraulicity, which is applied in the field of binders for castables of unshaped refractory materials and its preparation, can solve the problems of failing to meet the requirements of industrial applications and affecting the industrial application of hydraulic alumina

Active Publication Date: 2006-06-28
中铝郑州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The hydration and hardening speed of hydraulic alumina generally does not exceed 10 minutes, which cannot meet the requirements of industrial applications, which affects the large-scale industrial application of hydraulic alumina in the refractory industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 36g of hydraulic alumina with 1.6g of dibutyl phosphate, 0.8g of sodium sulfate, 0.8g of ammonium chloride, and 0.4g of polyethylene glycol, and mix them for 10 minutes at a ball-to-material ratio of 1.5:1 to obtain a composite admixture of 39.6 g. Mix the admixture with 1180g of hydraulic alumina in a conical mixer for 5 minutes to obtain a portion of hydraulic alumina with the admixture added.

[0019] The initial setting time of the hydraulic alumina was tested at a room temperature of 24°C, where the amount of water added was 4.8%, and the test results showed that the initial setting time was 28 minutes.

Embodiment 2

[0021] Take 30g of hydraulic alumina and mix them with 1.6g of dibutyl phosphate, 0.8g of stearic acid, 0.8g of sodium sulfate, and 0.4g of polyethylene glycol additives, and mix them for 10 minutes according to the ball-to-material ratio of 1.5:1 to obtain composite additives. Dose 33.6g. Mix the composite admixture with 950g of hydraulic alumina in a conical mixer for 5 minutes to obtain a portion of hydraulic alumina with the admixture added.

[0022] The initial setting time of the hydraulic alumina was tested at a room temperature of 24°C, where the amount of water added was 4.8%, and the test results showed that the initial setting time was 35 minutes.

Embodiment 3

[0024] On the basis of Example 2, the admixture is changed to 1.5g dibutyl phosphate, 0.5g stearic acid, 0.5g sodium sulfate, 0.4g sodium carbonate, 0.4g polyethylene glycol, 0.4g polyvinyl alcohol mixing, other The conditions are unchanged, and the test results show that the initial setting time is 46min.

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PUM

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Abstract

A water-hardening alumina type binder for the casting bulk refractory is proportionally prepared from water-hardening alumina and the additive chosen from palmic acid, stearic acid, dibutyl phosphate, polyethanediol, PVC, sodium sulfate, sodium carbonate and ammonium chloride through mixing said additive with part of water-hardening alumina, stirring, adding the rest of alumina and stirring.

Description

technical field [0001] A hydraulic alumina castable binder and a preparation method thereof relate to a binder for monolithic refractory castables and a preparation method thereof. Background technique [0002] At present, the binder used as monolithic refractories is mainly pure calcium aluminate cement. In the application of high-temperature refractory materials, the low-melting point phase formed due to its content of CaO—anorthite (CaO·Al 2 o 3 2SiO2 2 , melting point 1553°C) and calcium aluminate feldspar (2CaO·Al 2 o 3 ·SiO2 2 , melting point 1593 ℃) phase, so that its high temperature refractoriness is restricted, forming a refractoriness bottleneck, which seriously affects the quality of high temperature refractory materials. [0003] Use hydraulic alumina instead of pure calcium aluminate cement as a binder, which does not have a low melting point calcium phase. It has the same high-temperature phase composition as the corundum refractory material, so it can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/36C04B24/00C04B103/24
Inventor 姚长江张勇陈玮李建忠
Owner 中铝郑州有色金属研究院有限公司