Ceramic material as well as manufacturing method thereof

A technology for ceramic materials and ceramic products, which is applied in the field of reuse of fly ash-extracted aluminum tailings, can solve problems such as waste of silicon resources, white mud pollution, etc., and achieves the effects of low cost, low water absorption, and easy availability of materials

Inactive Publication Date: 2017-10-27
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to use lime mud to prepare ceramic materials, to solve the current problems of a large amount of lime mud pollution and waste of silicon resources

Method used

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  • Ceramic material as well as manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 500kg of white clay containing 22% (mass content) of alumina (from Shenhua Zhuneng Company), add 25kg of foaming agent silicon carbide, 200kg of flux feldspar, 275kg of flux glass powder, and 2.5kg of sodium tripolyphosphate as grinding aid ;

[0039] Put the above materials into a ball mill, add 660kg of water, and grind;

[0040] The ground slurry is spray dried at 200°C;

[0041] Send the dried materials to the silo for 48 hours;

[0042] The stale material is semi-dry pressed with a pressure forming machine;

[0043] Dry the formed green body;

[0044] The dried green body is fired in a tunnel kiln at a firing temperature of 950°C for 4 hours.

[0045] The prepared ceramic material was tested. Among them, the performance parameters of the ceramic material were: fire resistance class A; water absorption rate of 2.6%, tensile strength of 0.70 MPa, thermal conductivity of 0.7, and specific gravity of 0.45. Detect the content of ceramic materials, including 75% SiO 2 , 19% A...

Embodiment 2

[0047] Take 600kg of white mud containing 18% alumina (from Shenhua Zhuneng Company), add 30kg of free carbon of blowing agent, 170kg of feldspar, 200kg of flux glass powder, and 2.5kg of water glass as grinding aid;

[0048] Put the above materials into a ball mill, add 660kg of water, and grind;

[0049] Spray-dry the ground slurry at 260°C;

[0050] Send the dried materials to the silo;

[0051] The stale material is semi-dry pressed and formed by a press;

[0052] Dry the formed green body;

[0053] The dried green body is fired in a roller kiln at a firing temperature of 1300°C.

[0054] The prepared ceramic material was tested. Among them, the performance parameters of the ceramic material were: fire resistance class A; water absorption rate of 3%, tensile strength of 0.70 MPa, thermal conductivity of 0.65, and specific gravity of 0.4. Detect the content of ceramic materials, including 70% SiO 2 , 22% Al 2 O 3 , 8% Na 2 O and K 2 O.

Embodiment 3

[0056] Take 700kg of white clay containing 25% alumina (from Shenhua Zhunneng Company), add 25kg of blowing agent iron oxide, 125kg of feldspar, 150kg of fluorite, and 2.5kg of water glass;

[0057] Put the above materials into a ball mill, add 600kg of water, and grind;

[0058] Spray-dry the ground slurry at 300°C;

[0059] Send the dried materials to the silo;

[0060] The stale material is semi-dry pressed and formed by a press;

[0061] Dry the formed green body;

[0062] The dried green body is fired in a tunnel kiln at a firing temperature of 1450°C.

[0063] The prepared ceramic material is tested, wherein the performance parameters of the ceramic material are: fireproof performance class A; water absorption rate of 2.8%, tensile strength of 0.70 MPa, thermal conductivity of 0.6, and specific gravity of 0.45. Detect the content of ceramic materials, including 65% SiO 2 , 25% Al 2 O 3 , 10% Na 2 O and K 2 O.

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Abstract

The invention belongs to the resource utilization field and provides a method for preparing a ceramic material by coal ash aluminum-extracting tailing white mud and the ceramic material prepared by virtue of the method. The method comprises the steps of mixing white mud, a foaming agent, a fluxing agent, a solvent and a grinding aid, and sequentially carrying out grinding, drying, formation and sintering. The method has the beneficial effects that the process is simple, materials are easily available, the cost is low, and the ceramic material with industrial utilization values is produced from the industrial waste, namely the white mud; the prepared ceramic material is light, has thermal insulation property, fire resistance and acid-alkali corrosion resistance, can be used in high and low temperature environments and can be used for producing multipurpose ceramic products.

Description

Technical field [0001] The invention belongs to the field of resource reuse and relates to the reuse of fly ash aluminum extraction tailings. Background technique [0002] Fly ash is a solid waste produced after the combustion of coal or coal gangue, and its main composition is SiO 2 , Al 2 O 3 , FeO, Fe 2 O3, CaO, TiO 2 Wait. my country is a country where coal is the main energy source. In 2000, coal power generation produced 150 million tons of fly ash, and in 2010 it exceeded 300 million tons. The massive discharge of fly ash puts tremendous pressure on the construction of the national economy and the ecological environment. Because fly ash contains a large amount of Al, Fe and other elements, many companies have used fly ash to extract economical raw materials such as alumina and iron oxide. The tailings after extracting alumina from fly ash are collectively called white mud, in which the content of silicon oxide is 18%-50%, the content of alumina is 5%-40%, and other compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B35/14C04B38/02
CPCC04B33/13C04B33/131C04B35/14C04B38/02C04B2235/3201C04B2235/3217C04B2235/36C04B2235/77C04B2235/96C04B2235/9607C04B38/0067
Inventor 陈东杜艳霞梁兴国郭昭华曾伟党涛段文科宋相嵚李琦
Owner CHINA SHENHUA ENERGY CO LTD
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