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A kind of ultra-high thermal conductivity silica brick for coke oven carbonization chamber furnace wall and preparation method thereof

A technology of carbonization chamber and heat-conducting silicon, which is applied in the field of ultra-high heat-conducting silica bricks for the wall of the coke oven carbonization chamber. It can solve the problems of not considering the comprehensive performance, achieve tight combination, reduce the porosity of the finished product, and improve the thermal conductivity. Effect

Active Publication Date: 2016-06-08
REFRACTORY MATERIAL OF SINOSTEEL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technologies all focus on improving the conventional physical properties of silica bricks. Some special raw materials are used in the manufacturing technology to achieve better technical indicators than ordinary silica bricks, and their comprehensive performance is not considered.

Method used

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  • A kind of ultra-high thermal conductivity silica brick for coke oven carbonization chamber furnace wall and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The starting materials crystalline silica, fused silica, waste silica bricks, and silicon nitride are mixed according to 60%, 19%, 20%, and 1% by weight, and the additives are as follows: potassium feldspar + 1%, clay + 0.3%, fluorite + 1%, sodium tripolyphosphate + 0.1%, pulp waste liquid + 1% (all are percentages of the total weight of the starting material). After weighing the above-mentioned raw materials, put them into a wet mill and knead for 25 minutes, put the mixed mud into the mold cavity and press it into a mold, and put the machine-pressed green body into a dryer at a temperature of 100 ℃, keep warm for 24 hours, put the dried green body into the tunnel kiln for firing, the firing temperature is 1400 ℃, keep warm for 72 hours, and the finished product will be finished after cooling out of the kiln.

Embodiment 2

[0022] The starting materials crystalline silica, fused silica, waste silica bricks, and silicon nitride are proportioned according to 65%, 12%, 10%, and 13% by weight, and the additives are as follows: potassium feldspar + 1%, clay + 0.3%, fluorite + 1%, sodium tripolyphosphate + 0.1%, pulp waste liquid + 1% (all are percentages of the total weight of the starting material). After weighing the above-mentioned raw materials, put them into a wet mill for 25 minutes of kneading, put the mixed mud into the mold cavity and press it into a mold, and put the machine-pressed green body into a dryer at a temperature of 80 ℃, keep warm for 24 hours, put the dried green body into the tunnel kiln for firing, the firing temperature is 1430 ℃, keep warm for 72 hours, and the finished product will be finished after cooling out of the kiln.

Embodiment 3

[0024] The starting materials crystalline silica, fused silica, waste silica bricks, and silicon nitride are proportioned according to 67%, 13%, 10%, and 10% by weight, and the additives are as follows: potassium feldspar + 1%, clay + 0.3%, fluorite + 1%, sodium tripolyphosphate + 0.1%, pulp waste liquid + 1% (all are percentages of the total weight of the starting material). After weighing the above-mentioned raw materials, put them into a wet mill and knead for 25 minutes, put the mixed mud into the mold cavity and press it into a mold, and put the machine-pressed green body into a dryer at a temperature of Between 70°C and heat preservation for 24 hours, put the dried body into a tunnel kiln for firing at a firing temperature of 1450°C, heat preservation for 72 hours, and the finished product after cooling out of the kiln.

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Abstract

The invention discloses a superhigh-thermal conductivity silica brick for a coke oven charing chamber furnace wall and a preparation method thereof. The superhigh-thermal conductivity silica brick comprises, by weight, 60-70% of crystalline silica, 10-20% of fused silica, 3-20% of waste silica bricks, 1-15% of Si3N4, 1-4% of an additive, 6.9-9.5% of a binder and 0.1-0.3% of a water reducer. The preparation method comprises the following steps of carrying out wet-grinding blending on the raw materials with the above ratio, carrying out mechanical pressing molding and carrying out drying roasting to obtain the superhigh-thermal conductivity silica brick. The superhigh-thermal conductivity silica brick has thermal conductivity of 2.50-2.60w / m.k improved by more than 25% than the traditional silica brick thermal conductivity and has obvious energy saving and emission reduction effects.

Description

technical field [0001] The invention relates to an ultrahigh heat conduction silica brick used in a coke oven, in particular to an ultrahigh heat conduction silica brick used for a furnace wall of a coke oven carbonization chamber. Background technique [0002] China is the largest producer and consumer of coke in the world. Statistics show that China's coke production accounts for about 60% of the world's coke production. The amount of dust emitted from coke production accounts for about 6% of the country's total dust emissions. In the new historical period, affected by the gradual deterioration of the environment, the coking industry will face the new test of raising energy conservation and emission reduction standards, and the task of energy conservation and emission reduction is a major one. Therefore, in the field of coking, the promotion and use of energy-saving and environmentally friendly refractory materials for coke ovens has become an inevitable trend. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 薄钧甘菲芳郑德胜刘杰臧纯勇徐志栋王建武唐莉陈志勇
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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