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A kind of alumina fiber blanket and preparation method thereof

A technology of alumina fiber and alumina, which is applied in the field of refractory materials, can solve the problems of fiber or slag ball falling, loose fiber structure, etc., and achieve the effect of reducing slag ball content and improving integrity

Active Publication Date: 2021-07-23
山东鲁阳浩特高技术纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fiber structure of the existing alumina fiber strips is relatively loose, and the slag content is still high, so the problem of fiber or slag falling may still occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The invention provides a kind of preparation method of alumina fiber blanket, comprises the following steps:

[0029] a) mixing and heating polyaluminum chloride sol, silica sol and spinning aid to react to obtain spinning stock solution;

[0030] The spinning aid includes lactic acid, polyvinyl alcohol and alcohol; the amount of the spinning aid is 10 to 20 wt of the total mass of the aluminum oxide in the polyaluminum chloride sol and the silicon dioxide in the silica sol %;

[0031] b) forming the spinning stock solution into fibers in a spinning machine, and collecting the obtained fiber filaments to obtain a precursor fiber blank;

[0032] The wire spinning disc of the wire spinning machine is provided with multiple rows of spinning orifice plates, the distance between two adjacent rows of orifice plates is ≥5mm, and the spacing of the spinning holes on the same row of orifice plates is ≥2.5mm;

[0033] c) performing acupuncture on the precursor fiber base to obt...

Embodiment 1

[0050] Aluminum powder with a particle size of 200 mesh, hydrochloric acid and distilled water are heated and refluxed at 80°C according to a molar ratio of 1.8:1:20 to obtain a polyaluminum chloride sol with an alumina content of 30wt%; The polyvinyl alcohol, alcohol, and water are mixed and dissolved at room temperature according to the mass ratio of 0.75:10:0.75:100 to prepare the spinning aid solution. According to the ratio of aluminum oxide and silicon oxide mass content in the product being 72:28, the above-mentioned prepared 72kg of polymerized aluminum sol and 42kg of the purchased silica sol with a particle size of 15nm and a silicon dioxide content of 20wt% were mixed evenly, and then 45kg of the above-mentioned spinning The silk aid solution is polymerized at 80-100°C for 3 hours to obtain a spinning stock solution with a viscosity of 2000cP at 50°C.

[0051] The viscosity of the above-mentioned spinning dope was adjusted to 5000cP (25°C), and then fiber-forming wa...

Embodiment 2

[0057] Aluminum powder with a particle size of 200 mesh, hydrochloric acid and distilled water are heated and refluxed at 80°C according to a molar ratio of 1.8:1:20 to obtain a polyaluminum chloride sol with an alumina content of 30wt%; The polyvinyl alcohol, alcohol, and water are mixed and dissolved at room temperature according to the mass ratio of 0.75:10:0.75:100 to prepare the spinning aid solution. According to the ratio of aluminum oxide and silicon oxide mass content in the product being 72:28, the above-mentioned prepared 72kg of polymerized aluminum sol and 42kg of purchased silica sol with a particle size of 15nm and a silicon dioxide content of 20wt% were mixed evenly, and then 36kg of the above-mentioned spinning The silk aid solution is polymerized at 80-100°C for 3 hours to obtain a spinning stock solution with a viscosity of 2000cP at 50°C.

[0058] The viscosity of the above-mentioned spinning dope was adjusted to 5000cP (25°C), and then fiber-forming was pe...

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Abstract

The invention belongs to the technical field of refractory materials, and in particular relates to an alumina fiber blanket and a preparation method thereof. The preparation method provided by the present invention comprises the following steps: a) mixing and heating polyaluminum chloride sol, silica sol and spinning aids for reaction to obtain spinning dope; the spinning aids include lactic acid, polyvinyl alcohol and alcohol; b) The spinning stock solution is fiber-formed in a spinning machine, and the obtained fiber filaments are collected to obtain a precursor fiber blank; the distance between two adjacent rows of orifice plates in the spinning machine is ≥ 5 mm, and the same row of orifice plates The distance between the spinning holes on the upper surface is ≥ 2.5mm; c) Needling the precursor fiber blank to obtain the precursor fiber blanket; d) Carrying out the precursor fiber blanket in the low temperature zone, medium temperature zone and high temperature zone of the heating furnace in sequence Heat treatment to obtain alumina fiber blanket. The alumina fiber blanket prepared by the method of the invention has high integrity and low slag content, and is suitable for use as a surface protection material for ceramic fiber module furnace linings.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an alumina fiber blanket and a preparation method thereof. Background technique [0002] As a lightweight refractory material, refractory fiber has the advantages of light bulk density, low specific heat capacity, low thermal conductivity, good thermal shock resistance, high temperature resistance, and good chemical stability. It has been widely used as a refractory insulation material in furnaces. Compared with heavy refractory materials such as traditional castables and refractory bricks, it can save energy by 20-40%. [0003] According to the preparation method, refractory fibers can be divided into two categories, one is ceramic fiber prepared by high temperature melting process, and the other is alumina fiber prepared by dissolution-condensation process. Among them, ceramic fibers include common type, standard type, high-purity type, high-alumina ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4209D04H1/46D01F9/08D01D1/02D01D5/18
CPCD01D1/02D01D5/18D01F9/08D04H1/4209D04H1/46
Inventor 李梅岳耀辉郭中海傅超王成龙鹿明
Owner 山东鲁阳浩特高技术纤维有限公司
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