Light fire brick and preparing method thereof

A refractory brick and lightweight technology, applied in the field of lightweight refractory bricks and their preparation, can solve the problems of low strength, high cost, affecting the economic benefits of tunnel kilns and oil shaft kilns, etc., and achieve high refractory temperature, low cost, Long service life effect

Inactive Publication Date: 2004-09-22
李作范
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cost of lightweight refractory bricks produced by the polystyrene bead method is extremely high, and the ex-factory price is about 15,000 to 20,000 yuan / m 3 , and the strength is not high, seriously affecting the economic benefits of the tunnel kiln and oil shaft kiln industry, therefore, there is an urgent need for a low-cost, high-strength lightweight refractory brick and its feasible preparation method

Method used

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  • Light fire brick and preparing method thereof
  • Light fire brick and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First 100 grams of bauxite and 3.5 grams of bauxite cement are fully mixed to make mixture A;

[0022] Then 10ml concentration by weight is 35% magnesium dihydrogen phosphate solution and 10ml concentration by weight is 40% phosphoric acid and 2.5ml hydrogen peroxide fully mixed to make mixture B;

[0023] Pour mixture A and mixture B together and mix them well and then pour them into the mold. The mold is double-opened and lined with plastic paper to facilitate demoulding. After 24 hours of natural hardening, it will be demoulded and heat treated at 110-200°C. , and then fired at 1450-1750°C, and processed by a brick cutting machine and a brick grinding machine to get the finished product.

Embodiment 2

[0025] First 100 grams of bauxite and 4.5 grams of bauxite cement are fully mixed to make mixture A;

[0026] Then 15ml concentration by weight is that 30% magnesium dihydrogen phosphate solution and 15ml concentration by weight are 32% phosphoric acid and 2.5ml hydrogen peroxide fully mix and make mixture B;

[0027] Pour mixture A and mixture B together and mix them well and then pour them into the mold. The mold is double-opened and lined with plastic paper to facilitate demoulding. After 24 hours of natural hardening, it will be demoulded and heat treated at 110-200°C. , and then fired at 1450-1750°C, and processed by a brick cutting machine and a brick grinding machine to get the finished product.

Embodiment 3

[0029] First 100 grams of bauxite and 4 grams of bauxite cement are fully mixed to make mixture A;

[0030] Then 10ml concentration by weight is 35% magnesium dihydrogen phosphate solution and 10ml concentration is 40% aluminum oxide by weight and the hydrogen peroxide of 2.5ml fully mixes and makes mixture B;

[0031] Pour mixture A and mixture B together and mix them well and then pour them into the mold. The mold is double-opened and lined with plastic paper to facilitate demoulding. After 24 hours of natural hardening, it will be demoulded and heat treated at 110-200°C. , and then fired at 1450-1750°C, and processed by a brick cutting machine and a brick grinding machine to get the finished product.

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Abstract

A light-weight refractory brick burnt in tunnel kiln and oil-burning vertical kiln is prepared from bauxite, phosphoric acid, magnesium bihydrogen phosphate, aluminate cement, and H2O2. Said bauxite contains Al2O3 (more than 80%), magnesium oxdie (less than 0.25%), potassium oxide (less than 0.25%), sodium oxide (less than 0.25%), and calcium oxide (less than 0.25%). Its advantages are low cost, high resistance to high temp, high insulating effect, high strength, and long service life.

Description

technical field [0001] The invention relates to a lightweight refractory brick for a tunnel kiln and an oil shaft kiln and a preparation method thereof. Background technique [0002] 1700~1800℃ tunnel kiln and oil shaft kiln above 1800℃ are big energy consumers. A high temperature tunnel kiln consumes more than 10 tons of heavy oil every day. lightweight refractory bricks. At present, the cost of lightweight refractory bricks produced by the polystyrene bead method is extremely high, and the ex-factory price is about 15,000 to 20,000 yuan / m 3 , and the strength is not high, which has seriously affected the economic benefits of the tunnel kiln and oil shaft kiln industries. Therefore, there is an urgent need for a low-cost, high-strength lightweight refractory brick and a feasible preparation method thereof. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a lightweight refractory brick with low cost and high str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/101C04B35/66
Inventor 李作范
Owner 李作范
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