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Preparation method of ultra-low cement refractory castable

A technology of refractory castables and castables, applied in the field of refractory materials, can solve problems such as low high-temperature strength and reduced medium-temperature strength, and achieve the effects of improving high-temperature performance, reducing water addition, and improving performance

Inactive Publication Date: 2011-12-28
ZIBO HAITAI HIGH TEMPERATURE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to prepare a method for preparing ultra-low cement castables, which solves the problems of reduced medium-temperature strength and low high-temperature strength of traditional refractory castables, and at the same time improves the practicability of ultra-low cement

Method used

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  • Preparation method of ultra-low cement refractory castable

Examples

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Effect test

Embodiment 1

[0024] Example 1: First, select raw materials, use super-grade bauxite aggregate, and use bauxite powder, microsilica powder, and aluminate cement as a matrix, and add sodium tripolyphosphate as a water-reducing agent, and the raw materials are prepared by weight percentage. :

[0025] Special grade bauxite particles 8-0.088mm 60%

[0026] Super fine bauxite powder 150-325 mesh 26%

[0027] Silica powder 2 microns 10%

[0028] Aluminate cement 4%

[0029] Sodium tripolyphosphate 0.2%

[0030] Water 5.5%

[0031] After the raw materials are selected, molding, sintering and testing are carried out according to the process in the content of the invention. The testing results are as follows:

[0032]

Embodiment 2

[0033] Example 2: First, select raw materials, use super-grade bauxite aggregate, and use bauxite powder, microsilica powder, and aluminate cement as a matrix, and add sodium tripolyphosphate as a water-reducing agent, and its raw materials are prepared by weight percentage :

[0034] Special grade bauxite particles 8-0.088mm 65%

[0035] Super fine bauxite powder 150-325 mesh 25%

[0036] Silica powder 2 microns 6%

[0037] Aluminate cement 4%

[0038] Sodium tripolyphosphate 0.3%

[0039] water 6%

[0040] After the raw materials are selected, molding, sintering and testing are carried out according to the process in the content of the invention. The testing results are as follows:

[0041]

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Abstract

A method for preparing an ultra-low cement refractory castable, which belongs to the technical field of refractory materials, is characterized in that the castable is made of the following raw materials: super-grade alumina particles, particle size 8-0.088mm 50-70%; super-grade alumina Soil fine powder, particle size 150-325 mesh 7-20%; silica micropowder, particle size 2 microns 2-10%; aluminate cement 2-8%; sodium tripolyphosphate 0.01-1%; water 3-8%. The preparation method of the invention solves the problems of low medium temperature strength and low high temperature strength of traditional refractory castables, and at the same time improves the practicability of ultra-low cement.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and particularly relates to a preparation method of an ultra-low cement refractory castable. Background technique [0002] Ultra-low cement refractory castable refers to refractory castable with CaO content of 0.2%-1.0%. By using ultrafine powder, high-efficiency dispersant and precise particle grading, etc., the cement content in the castable is reduced to less than 4%, the CaO content brought by the high alumina cement is less than 1.0%, and the water consumption is reduced to 4%-7 %, thereby improving the performance of the castable. Since the CaO content in the castable is less than 1.0%, there are few low-melting substances such as feldspar formed, so the high temperature performance is excellent, and it is widely used in important parts of thermal equipment such as kilns, and the effect is good. [0003] Ordinary castable products with high alumina bauxite cement as binder ge...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 吴师岗张红鹰
Owner ZIBO HAITAI HIGH TEMPERATURE MATERIAL TECH