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Refractory brick for hot air furnace

A technology for refractory bricks and hot blast stoves is applied in the field of refractory material manufacturing, which can solve the problems of insufficient compressive strength and poor thermal shock resistance of refractory bricks, and achieve the effects of good thermal shock resistance and improved service life.

Inactive Publication Date: 2015-09-30
LIUZHOU YITING TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of refractory brick for hot blast stove, so as to solve the problem of insufficient compressive strength and poor thermal shock resistance of the refractory brick produced by the existing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A refractory brick for a hot blast stove is composed of the following raw materials in parts by weight: 400 kilograms of alumina clinker, 150 kilograms of silicon carbide powder, 100 kilograms of silicon nitride powder, 200 kilograms of magnesia, and 50 kilograms of waste paper pulp; this embodiment The magnesia is light burned magnesia, and the PH value of the pulp waste liquid is 8.

[0017] Weigh the raw materials according to the weight parts of the above raw materials, put the bauxite clinker, silicon carbide powder and silicon nitride powder into the mixer and stir, then add magnesia and paper pulp waste liquid to mix well, and the material will be trapped for 2 days. A brick press is used to make bricks, and the bricks are dried and put into a firing kiln for sintering to obtain the refractory bricks for the hot blast stove.

Embodiment 2

[0019] A refractory brick for a hot blast stove is composed of the following raw materials in parts by weight: 500 kilograms of alumina clinker, 200 kilograms of silicon carbide powder, 150 kilograms of silicon nitride powder, 300 kilograms of magnesia, and 80 kilograms of pulp waste liquid; this embodiment The magnesia is light-burned magnesia, and the PH value of the pulp waste liquid is 9.

[0020] Weigh the raw materials according to the weight parts of the above raw materials, put the bauxite clinker, silicon carbide powder and silicon nitride powder into the mixer and stir, then add the magnesia and paper pulp waste liquid to mix well, trap the material for 3 days, A brick press is used to make bricks, and the bricks are dried and put into a firing kiln for sintering to obtain the refractory bricks for the hot blast stove.

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Abstract

The invention discloses a refractory brick for a hot air furnace and relates to the technical field of refractory material manufacturing. The refractory brick consists of the following raw materials in parts by weight: 40-50 parts of alumina clinker, 15-20 parts of silicon carbide powder, 10-15 parts of silicon nitride powder, 20-30 parts of magnesia and 5-8 parts of paper pulp waste liquid; and the refractory brick for the hot air furnace is prepared by the steps of dosing, mixing, ageing, blank making, drying and firing. Compared with the prior art, the refractory brick disclosed by the invention has the advantages of corrosion resistance, high temperature resistance, strong compressive strength and good thermal shock resistance; and moreover, cracks do not appear easily in the using process of the refractory brick for the hot air furnace, and thus the service life is prolonged.

Description

Technical field [0001] The invention relates to the technical field of refractory material manufacturing, in particular to a refractory brick for a hot blast stove. Background technique [0002] Refractory bricks for hot blast stoves require high refractoriness and load softening temperature, corrosion resistance, high compressive strength, good thermal shock resistance, small thermal expansion coefficient and high stability within the range of working temperature changes, while the currently used refractory bricks High temperature resistance and corrosion resistance, but insufficient compressive strength and poor thermal shock resistance. It is prone to cracks and damage during use as refractory bricks for hot blast stoves and has a short service life. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a refractory brick for a hot blast stove to solve the problems of insufficient compressive strength and poor thermal shock ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张开亿王嘉龙冯娟
Owner LIUZHOU YITING TRADE
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