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Microporous lightweight silica brick and preparation method thereof

A lightweight, silica brick technology, applied in the field of refractory materials, can solve the problems of poor heat insulation effect, large pore size, and high volume density

Pending Publication Date: 2021-09-10
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a microporous lightweight silica brick to solve the problems of existing lightweight silica bricks with high volume density, large pore size, low service temperature and poor heat insulation effect

Method used

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  • Microporous lightweight silica brick and preparation method thereof

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Effect test

Embodiment 1

[0034] The microporous lightweight silica brick of the present embodiment is mainly made of a mixture and an animal hoof keratin foaming agent, and the consumption of the animal hoof keratin foaming agent is 9% of the mixture quality;

[0035] The mixture is made up of the following components in mass percent: 10% silica particles (SiO 2 Content is 98wt%), 58% silica fine powder (SiO 2 Content is 98wt%), 15% silicon powder (SiO 2 The content is 92wt%), 8% of calcium silicate cement, 1% of iron oxide powder, 3% of calcium oxide powder, 3% of fluorite powder, and 2% of calcium lignosulfonate.

[0036] Among them, the particle size of silica particles is 0.1-3 mm, and the particle size of silica fine powder and silicon micropowder is ≤0.075 mm; in the mixture, the mass ratio of silica particles to silica fine powder is 10:73.

[0037] The preparation method of the microporous lightweight silica brick of the present embodiment comprises the following steps:

[0038] 1) Take the...

Embodiment 2

[0044] The microporous lightweight silica brick of this embodiment is mainly made of a mixture and a tea saponin vegetable protein foaming agent, and the consumption of the tea saponin vegetable protein foaming agent is 3% of the mixture quality;

[0045] The mixture is made up of the following components in mass percent: 40% silica particles (SiO 2 Content is 99wt%), 20% silica fine powder (SiO 2 Content is 99wt%), 10% quartz powder (SiO 2 content of 99.4wt%), 10% silicon powder (SiO 2 The content is 96wt%), 10% of silica sol, 1% of iron oxide powder, 5% of milk of lime, 3.5% of fluorite powder, and 0.5% of sodium carbonate.

[0046] Among them, the particle size of silica particles is 0.1-3 mm, and the particle size of silica fine powder, quartz powder, and silicon micropowder is ≤0.075 mm; in the mixture, the mass ratio of silica particles to silica fine powder is 40:40.

[0047] The preparation method of the microporous lightweight silica brick of the present embodiment...

Embodiment 3

[0054] The microporous lightweight silica brick of this embodiment is mainly made of a mixture and a foaming agent, and the amount of the foaming agent is 3% of the mixture quality; the foaming agent is composed of the following components in mass percentage: 20 % sodium lauryl sulfate and 80% sodium ceteth sulfate;

[0055] The mixture is made up of the following components in mass percent: 10% silica particles (SiO 2 Content is 98.5wt%), 15% waste silica brick particles (SiO 2 Content is 94.3wt%), 55% silica fine powder (SiO 2 The content is 98.5wt%), 8% calcium silicate cement, 0.5% iron oxide powder, 5% calcium oxide powder, 1% fluorite powder, 0.5% sodium tripolyphosphate, 5% gelatin.

[0056] Among them, the particle size of silica particles and waste silica brick particles is 0.1-3 mm, and the particle size of silica fine powder is ≤0.075 mm; in the mixture, the mass ratio of silica particles to silica fine powder is 25:55.

[0057] The preparation method of the micr...

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Abstract

The invention discloses a microporous lightweight silica brick and a preparation method thereof, the lightweight silica brick is mainly prepared from a mixture and a foaming agent, and the dosage of the foaming agent is 0.1-10% of the mass of the mixture; the mixture is prepared from the following components in percentage by mass: 70%-95% of a siliceous material, 1%-25% of an inorganic cementing material, 0.1%-15% of a mineralizing agent and 0.1%-5% of an additive; wherein the siliceous material is composed of siliceous particles and siliceous fine powder, the particle size of the siliceous particles is 0.1-3 mm, the particle size of the siliceous fine powder is smaller than or equal to 0.075 mm, and the mass ratio of the siliceous particles to the siliceous fine powder is (1-65): (35-99). The obtained microporous lightweight silica brick product has the advantages of fine aperture, small density, low thermal conductivity, high porosity, high mechanical strength, good high-temperature volume stability, strong acid atmosphere and slag erosion resistance and the like, is low in preparation cost and good in heat insulation effect, meets harsh high-temperature environment and heat insulation requirements of thermal equipment, and is suitable for popularization and application.

Description

[0001] This application is a divisional application of a Chinese patent application submitted to the China Patent Office on December 11, 2015 with the application number CN201510928913.4 and the title of the invention "a microporous lightweight silica brick and its preparation method". technical field [0002] The invention belongs to the technical field of refractory materials, and in particular relates to a microporous lightweight silica brick, and also relates to a preparation method of the microporous lightweight silica brick. Background technique [0003] Energy is the main factor to maintain human civilization, and energy conservation and environmental protection have become a worldwide research topic. In terms of energy consumption, high-temperature industry is the main energy-consuming industry in my country's industrial production. Studies have shown that due to poor insulation of various kilns and heat pipelines in my country, the annual heat loss is equivalent to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B35/14C04B35/622
CPCC04B35/14C04B38/10C04B2235/77C04B2235/96C04B2235/9607C04B2235/9615C04B38/0051C04B38/0054C04B38/0067C04B38/007C04B38/0074
Inventor 李文凤郭会师韩平叶方保侯永改邹文俊
Owner HENAN UNIVERSITY OF TECHNOLOGY
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