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Ceramic-fiber heat-insulation material based on waste polyaluminum chloride residues and preparation method thereof

A technology of polyaluminum chloride waste residue and ceramic fiber is applied in the field of ceramic fiber heat insulation material and its preparation, which can solve the problems of insufficient utilization of PAC waste residue and comprehensive development and utilization, and achieves low production cost, wide source, and raw materials. A wide range of effects

Active Publication Date: 2016-12-14
河南瑞达净化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology does not make full use of the characteristics of PAC waste residue, nor does it carry out comprehensive development and utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A ceramic fiber thermal insulation material based on polyaluminum chloride waste slag and a preparation method thereof. The preparation method described in this embodiment is:

[0035] The first step is to mix 20~35wt% polyaluminum chloride waste residue, 55~70wt% aluminum-containing raw materials and 0.1~10wt% additives to obtain the mixture I; add 8~13 times the mass of the mixture I water, stirred at 50-80°C for 3-6 hours, allowed to stand, and filtered to obtain the filter material.

[0036] In the second step, 60~70wt% of the filter material, 20~30wt% of municipal sludge and 0.1~10wt% of surfactant are mixed uniformly, and pressed and formed under the condition of 50~100MPa; in reducing atmosphere and 600~ Heat treatment at 800°C for 3-6 hours, crush, grind, and sieve to obtain material A with a particle size of less than 0.088mm and material B with a particle size of 0.088-1mm.

[0037] In the third step, 20~30wt% of the A material, 10~20wt% of the B material, 1...

Embodiment 2

[0051] A ceramic fiber thermal insulation material based on polyaluminum chloride waste slag and a preparation method thereof. Present embodiment except following material all the other are with embodiment 1:

[0052] The aluminum-containing raw material is alumina micropowder;

[0053] The silicon-containing raw material is fused silica;

[0054] The additive is hydroxystearin;

[0055] The surfactant is an alkyl glycoside;

[0056] The reducing atmosphere is a carbon monoxide atmosphere;

[0057] The neutral atmosphere is an argon atmosphere;

[0058] The ceramic fibers are magnesium silicate ceramic fibers;

[0059] The binding agent is silica sol;

[0060] The inorganic thickener is spherical clay;

[0061] The organic thickener is modified starch.

Embodiment 3

[0063] A ceramic fiber thermal insulation material based on polyaluminum chloride waste slag and a preparation method thereof. The preparation method described in this embodiment is:

[0064] The first step is to mix 35~50wt% of polyaluminum chloride waste residue, 40~55wt% of aluminum-containing raw materials and 0.1~10wt% of additives to obtain the mixture I; add 10~15 times the mass of the mixture I water, stirred at 60-90°C for 3-6 hours, allowed to stand, and filtered to obtain the filter material.

[0065] In the second step, 70~80wt% of the filter material, 10~20wt% of municipal sludge and 0.1~10wt% of surfactant are mixed uniformly, and pressed under the condition of 50~100MPa; in reducing atmosphere and 700~ Heat treatment at 900°C for 3-6 hours, crush, grind, and sieve to obtain material A with a particle size of less than 0.088mm and material B with a particle size of 0.088-1mm.

[0066] In the third step, 30-40wt% of the A material, 10-20wt% of the B material, 10...

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Abstract

The invention relates to a ceramic-fiber heat-insulation material based on waste polyaluminum chloride residues and a preparation method thereof. According to a technical scheme in the invention, the preparation method comprises the following steps: mixing the waste polyaluminum chloride residues, an aluminum-containing raw material and an additive, adding water, carrying out stirring and then carrying out filtering so as to obtain a filter material; uniformly mixing the filter material, municipal sludge and a surfactant, carrying out molding and then successively carrying out heat treatment in a reducing atmosphere, grinding and screening so as to obtain a material A and a material B; uniformly mixing the material A, the material B, a silicon-containing raw material and an aluminum-containing raw material, carrying out heat treatment in a reducing atmosphere and then carrying out heat treatment in a neutral atmosphere so as to obtain a material C and a material D; uniformly mixing the material A, the material C, the material D, ceramic fibers, a binder, an inorganic thickening agent and an organic thickening agent, adding water and carrying out stirring and molding; and carrying out drying and heat treatment so as to prepare the ceramic-fiber heat-insulation material based on the waste polyaluminum chloride residues. The preparation method provided by the invention uses widely available raw materials and has low production cost; and the prepared ceramic-fiber heat-insulation material based on the waste polyaluminum chloride residues has small volume density and a low heat conduction coefficient.

Description

technical field [0001] The invention belongs to the technical field of ceramic fiber thermal insulation materials. In particular, it relates to a ceramic fiber thermal insulation material based on polyaluminum chloride waste slag and a preparation method thereof. Background technique [0002] Polyaluminum chloride waste slag is the waste slag formed by the residual solid after bauxite and calcium aluminate powder react with hydrochloric acid or mixed acid under certain conditions to obtain liquid polyaluminum chloride (PAC). my country produces 400kt of liquid PAC annually, and every 1t of liquid PAC containing 10% alumina will produce 150kg of waste residue, and 60kt of solid waste residue will be generated every year. This kind of waste residue is viscous and weakly acidic, which is extremely harmful to the environment. [0003] At present, the main treatment methods for PAC waste residue at home and abroad are landfill, dumping, brick making or fertilizer production. L...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/18C04B35/622C04B35/63C04B35/636C04B35/20
CPCC04B35/18C04B35/20C04B35/622C04B35/62204C04B35/6316C04B35/636C04B35/6365C04B35/80C04B2235/3217C04B2235/3218C04B2235/3418C04B2235/349C04B2235/77C04B2235/9607
Inventor 刘浩陈少一王周福王玺堂马妍
Owner 河南瑞达净化材料有限公司
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