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Preparation method of high-alumina brick

A high-alumina brick and a technology for preparation steps, applied in the field of high-alumina brick preparation, can solve the problems of insufficient anti-peeling and anti-erosion properties, poor volume stability, and expansion of molten steel erosion, and achieve increased adhesion, volume stability, resistance to Aggressive enhancement effect

Inactive Publication Date: 2017-08-04
CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is that the existing high-alumina bricks have insufficient anti-stripping and anti-corrosion properties. At the same time, during the use of the existing high-alumina bricks, the original high-alumina bricks have poor volume stability and large shrinkage of the bricks, resulting in molten steel. Corrosion expansion, short service life, providing a preparation method for high alumina bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] According to the mass ratio of 1:1:2:2, weigh kaolinite, boehmite, mullite and high alumina bauxite respectively, add them to the pulverizer in order to pulverize, and pass through a 50-60 mesh sieve after pulverization to obtain mixed ore powder. Then put the mixed ore powder into the jet mill for crushing, and pass through a 2800-2900 mesh sieve after crushing to obtain the mixed ultrafine ore powder, mix the mixed ultrafine ore powder and water according to the mass ratio of 1:6, and then add it to the homogenizer , homogenized at 8000-10000r / min for 10-15 minutes to obtain a suspension, then mixed the suspension with absolute ethanol at a mass ratio of 1:3, stirred and mixed for 10-15 minutes to obtain a mixture, and poured into the mixture in turn Add 6-9% epichlorohydrin and 3-5% dodecylamine to the mixed solution, continue to stir and react for 3-4 hours, then filter to obtain the filter residue, put the filter residue in an oven, and heat it at a temperature of 1...

example 2

[0028]According to the mass ratio of 1:1:2:2, weigh kaolinite, boehmite, mullite and high alumina bauxite respectively, add them to the pulverizer in order to pulverize, and pass through a 50-60 mesh sieve after pulverization to obtain mixed ore powder. Then put the mixed ore powder into the jet mill for crushing, and pass through a 2800-2900 mesh sieve after crushing to obtain the mixed ultrafine ore powder, mix the mixed ultrafine ore powder and water according to the mass ratio of 1:6, and then add it to the homogenizer , homogenized at 8000-10000r / min for 10-15 minutes to obtain a suspension, then mixed the suspension with absolute ethanol at a mass ratio of 1:3, stirred and mixed for 10-15 minutes to obtain a mixture, and poured into the mixture in turn Add 6-9% epichlorohydrin and 3-5% dodecylamine to the mixed solution, continue to stir and react for 3-4 hours, then filter to obtain the filter residue, put the filter residue in an oven, and heat it at a temperature of 10...

example 3

[0031] According to the mass ratio of 1:1:2:2, weigh kaolinite, boehmite, mullite and high alumina bauxite respectively, add them to the pulverizer in order to pulverize, and pass through a 50-60 mesh sieve after pulverization to obtain mixed ore powder. Then put the mixed ore powder into the jet mill for crushing, and pass through a 2800-2900 mesh sieve after crushing to obtain the mixed ultrafine ore powder, mix the mixed ultrafine ore powder and water according to the mass ratio of 1:6, and then add it to the homogenizer , homogenized at 8000-10000r / min for 10-15 minutes to obtain a suspension, then mixed the suspension with absolute ethanol at a mass ratio of 1:3, stirred and mixed for 10-15 minutes to obtain a mixture, and poured into the mixture in turn Add 6-9% epichlorohydrin and 3-5% dodecylamine to the mixed solution, continue to stir and react for 3-4 hours, then filter to obtain the filter residue, put the filter residue in an oven, and heat it at a temperature of 1...

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PUM

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Abstract

The invention discloses a preparation method of a high-alumina brick and belongs to the technical field of refractory material preparation. The method comprises the steps of firstly crushing ores such as kaolinite and boehmite into mixed superfine ore powder, mixing the mixed superfine ore powder and water and carrying out homogenate treatment to prepare a turbid liquid; adding the turbid liquid to absolute ethyl alcohol, mixing and sequentially adding epichlorohydrin and lauryl amine, carrying out hybrid reaction, filtering, collecting filter residues and drying to obtain a dried product; crushing and sieving biotite and silicon oxide to obtain a mixed additive, mixing with the dried product and project dregs, adding the mixture to a mold and pressing to form a green brick; and finally carrying out autoclaved curing, drying, high-temperature sintering on the green brick and cooling to obtain high-alumina brick. The prepared high-alumina brick has relatively high strength and more stable volume, meanwhile, the apparent porosity of a brick body is low, the compactness of the high-alumina brick is effectively improved and the anti-strip property and the anti-erosion property of the high-alumina brick are improved, thereby prolonging the service life of the high-alumina brick.

Description

technical field [0001] The invention discloses a method for preparing high alumina bricks, and belongs to the technical field of refractory material preparation. Background technique [0002] Refractory materials refer to inorganic non-metallic materials with a refractoriness of not less than 1500°C, which are used as the structure of thermal equipment such as high-temperature kilns and high-temperature containers, and as component materials in high-temperature devices. Refractories are basic materials for high temperature technology, and are mainly used in iron and steel industry, non-ferrous metal industry, building materials industry, petrochemical industry, machinery industry and other departments. [0003] High alumina brick is one of the ideal heat insulation refractory materials at present. It is a kind of aluminum carbon refractory material. It has the characteristics of high compressive strength, low thermal conductivity, good thermal insulation performance and low ...

Claims

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Application Information

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IPC IPC(8): C04B35/66F27D1/04
CPCC04B35/66C04B2235/3218C04B2235/3418C04B2235/3463C04B2235/3481C04B2235/349C04B2235/5212C04B2235/5232C04B2235/602C04B2235/606C04B2235/614C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607C04B2235/9676F27D1/04
Inventor 张军葛明月孙冬
Owner CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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