Foaming thermal-insulation fireproof brick produced by using coal gangue, and preparation method thereof

A technology of coal gangue and refractory bricks, which is applied in the field of lightweight thermal insulation refractory bricks and its preparation, can solve the problems of product specific gravity decrease, low refractoriness, low strength, etc., and achieve low fuel cost, high refractoriness and high hardness Effect

Inactive Publication Date: 2015-12-09
牛艳宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a foamed thermal insulation refractory brick produced by using coal gangue as the main raw material and its preparation method, which solves the problems of low refractoriness, poor molding, low strength and high cost of lightweight refractory thermal insulation bricks in the domestic market, and can be used in large quantities. Solid waste such as coal gangue and fly ash saves costs, and there is a lot of carbon in coal gangue and fly ash. During the sintering process, it can provide heat and reduce fuel consumption. At the same time, due to the combustion of carbon, it can A large number of air bubbles are generated, which reduces the specific gravity of the product, saves foaming agent and has the effect of heat preservation

Method used

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  • Foaming thermal-insulation fireproof brick produced by using coal gangue, and preparation method thereof
  • Foaming thermal-insulation fireproof brick produced by using coal gangue, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, the processed raw materials are weighed according to the following proportions: 42 parts of coal gangue, 45 parts of high alumina clinker, 7 parts of fly ash, 5.5 parts of silica, 0.5 part of sulfurous acid pulp waste liquid; Weigh the high-alumina clinker, mix it with coal gangue, and then add water to make the water content in the mud 5%; wet the mud and send it to 100-200kg / cm 2 The press is pressed; the pressed bricks are stacked and put into the drying furnace for drying for 48 hours; the dried bricks are sent to the tunnel kiln for firing.

[0029] The firing curve is: from normal temperature to 200°C, the heating rate is 40°C / hour; from 200 to 600°C, the heating rate is 30°C / hour; from 600 to 900°C, the heating rate is 50°C / hour; Keep warm for 3 hours when it reaches temperature.

[0030] The product specific gravity that present embodiment obtains is 1.2kg / cm 3 , the refractoriness is 1750°C, the load softening temperature is 1230°C, and the comp...

Embodiment 2

[0031] Embodiment 2, the processed raw materials are weighed according to the following proportions: 48 parts of coal gangue, 38 parts of high alumina clinker, 5 parts of fly ash, 8.5 parts of silica, 0.5 part of sulfurous acid pulp waste liquid; Weigh the high-alumina clinker, mix it with coal gangue, and then add water to make the water content in the mud 5%; wet the mud and send it to 100-200kg / cm 2 The press is pressed; the pressed bricks are stacked and put into the drying furnace for drying for 48 hours; the dried bricks are sent to the tunnel kiln for firing.

[0032] The firing curve is: from normal temperature to 200°C, the heating rate is 40°C / hour; from 200 to 600°C, the heating rate is 30°C / hour; from 600 to 900°C, the heating rate is 50°C / hour; Keep warm for 3 hours when it reaches temperature.

[0033] The product specific gravity that present embodiment obtains is 1.2kg / cm 3 , the refractoriness is 1750°C, the load softening temperature is 1180°C, and the comp...

Embodiment 3

[0034] Embodiment 3, the processed raw materials are weighed according to the following proportions: 55 parts of coal gangue, 35 parts of high alumina clinker, 3 parts of fly ash, 6.5 parts of silica, 0.5 part of sulfurous acid pulp waste liquid; Weigh the high-alumina clinker, mix it with coal gangue, and then add water to make the water content in the mud 5%; wet the mud and send it to 100-200kg / cm 2 The press is pressed; the pressed bricks are stacked and put into the drying furnace for drying for 48 hours; the dried bricks are sent to the tunnel kiln for firing.

[0035] The firing curve is: from normal temperature to 200°C, the heating rate is 40°C / hour; from 200 to 600°C, the heating rate is 30°C / hour; from 600 to 900°C, the heating rate is 50°C / hour; Keep warm for 3 hours when it reaches temperature.

[0036] The product specific gravity that present embodiment obtains is 1.1kg / cm 3 , the refractoriness is 1730°C, the load softening temperature is 1100°C, and the comp...

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Abstract

The invention relates to a high-strength foaming thermal-insulation brick produced by using coal gangue, and a preparation method thereof, wherein the raw materials comprise, by weight, 40-60 parts of coal gangue, 30-50 parts of bauxite tailings, 2-15 parts of fly ash, 0-15 parts of silica sand, and 0-1 part of a sulfurous acid paper pulp waste liquid. According to the present invention, with the foaming thermal-insulation fireproof brick produced by using the coal gangue as the main raw material, and the preparation method of the present invention, the problems of low fire resistance, poor molding, low strength and high cost of the light fireproof thermal-insulation brick in the current domestic market are solved, and the product has characteristics of light weight, thermal insulation and fire resistance, and can be widely used for important equipment in the glass-ceramic industry.

Description

technical field [0001] The invention relates to a light-weight thermal insulation refractory brick and a preparation method thereof, and belongs to the field of refractory materials. Background technique [0002] At present, most of the light-weight refractory and thermal insulation materials in the domestic market are mainly made of clay and silicon, with low refractoriness, and most of the manufacturing methods are adding combustible materials (such as sawdust, charcoal, organic matter, etc.) During the process, the combustibles are burned out, leaving holes and becoming lightweight refractory materials. Due to the poor plasticity of the mud added with sawdust, it is easy to cause defects such as difficult molding and product distortion. [0003] Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/66
Inventor 牛艳宁
Owner 牛艳宁
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