Method for manufacturing aluminium silicate ceramic fiber using coalgangue and its use

A technology of aluminum silicate ceramics and ceramic fibers, which is applied in the field of ceramic products, can solve the problems of undiscovered aluminum silicate ceramic fibers, etc., and achieve the effects of improving the level of comprehensive utilization, reducing pollution, and saving mineral resources

Inactive Publication Date: 2003-06-11
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no reports have been found on the use of coal gangue to manufacture aluminum silicate ceramic fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1 The composition is: Al 2 o 3 43.37%, SiO 2 +Al 2 o 3 89.07%, Fe 2 o 3 0.36%, K 2 O+Na 2 O 0.41%, loss on ignition 8.34% coal gangue 100 tons is placed in the downdraft kiln, after being calcined at 1300 ℃ for 300 hours, cooled to obtain white gangue clinker. After testing its composition is: Al 2 o 3 46.32%, SiO 2 +Al 2 o 3 97.57%, Fe 2 o 3 0.43%, K 2 O+Na 2 O 0.50%, balance 1.50%. The calcined gangue clinker is crushed into a natural gradation with a particle size of ≤15mm by a crusher, put into a high-temperature resistance furnace, and melted at about 2200°C. Adopt high-speed continuous melting and continuous spinning machine to spin the silk into aluminum silicate ceramic fiber cotton. Its chemical composition index is: Al 2 o 3 ≥46.00%, SiO 2 +Al 2 o 3 ≥97.00%, Fe 2 o 3 ≤1.00%, K 2 O+Na 2 O≤0.50%. The physical performance indicators are: white color, fiber diameter 2-6mm, fiber length ≥ 30mm, slag ball (≥ 0.25mm) content ...

Embodiment 2

[0011] Example 2 Take the ceramic fiber loose cotton prepared in Example 1, and use the traditional manufacturing process of ceramic fiber cotton refractory products to produce ceramic fiber needle-punched blankets, ceramic fiber felts, ceramic fiber machine-made boards, ceramic fiber paper and ceramic fiber textiles.

Embodiment 3

[0012] Example 3 The composition is: Al 2 o 3 43.01%, SiO 2 +Al 2 o 3 88.12%, Fe 2 o 3 0.42%, K 2 O+Na 2 100 tons of coal gangue with O 0.37% and loss on ignition of 9.21% are placed in a downdraft kiln, calcined at 1000°C for 360 hours and then cooled to obtain white gangue clinker. After testing its composition is: Al 2 o 3 45.87%, SiO 2 +Al 2 o 3 97.13%, Fe 2 o 3 0.61%, K 2 O+Na 2 O0.42%. The calcined gangue clinker is crushed into a natural gradation with a particle size of ≤15mm by a crusher, put into a high-temperature resistance furnace, and melted at 2300°C. Adopt high-speed continuous melting and continuous spinning machine to spin the silk into aluminum silicate ceramic fiber cotton.

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Abstract

The invention refers to a method of making aluminum silicate ceramic fibery by gangue and the application. It uses the gangue as raw material and is produced by calcinations, melting, spray-blow or centrifugal swinging to make thread. The gangue chemical components: Al2O3>=43.00%, SiO2+Al2O3>=85.00%, Fe2O3 <=1.00%, K2O+Na2O<=0.50 and burning loss quantity<=15.00%, firstly calcining the gangue at 1000-1600 C degree for 300-360h, then melting in at 2100-2300 C degree.

Description

Technical field [0001] The present invention belongs to Al 2 o 3 and SiO 2 The field of ceramic products as a base material component, especially relates to the production of aluminum silicate ceramic fibers using coal gangue. Background technique [0002] Coal gangue is solid waste generated during coal mining and washing and processing, and is one of the largest industrial solid wastes currently discharged. There are more than 1,500 coal gangue hills in the country, covering an area of ​​more than 200,000 mu, with a stockpiling capacity of 3.4 billion tons. And it is growing at a rate of 100 million tons per year. Coal gangue has been stockpiled for a long time, occupying a large amount of land, causing spontaneous combustion and polluting the air and groundwater. Coal gangue is also an available resource, and the State Economic and Trade Commission regards the expansion of coal gangue as the key task of the comprehensive utilization of resources during the "Ninth Fiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/00C03B37/04C03B37/06C03C13/00C03C13/06
CPCC03C13/006C03C13/00
Inventor 鹿成洪鹿成会任大贵苗海波李京友
Owner LUYANG ENERGY SAVING MATERIALS CO LTD
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