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Sintering preparation for porous ceramic employing EAF dust

An electric arc furnace and dust collection technology, which is applied in the field of resource utilization and environmental protection, can solve the problems of difficulty in banning solid clay bricks, destruction, occupation of cultivated land, etc., and achieve the effect of good water retention and water absorption

Inactive Publication Date: 2004-11-17
孙文郁 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some cities, due to local natural conditions and resources, it is indeed very difficult to ban solid clay bricks within a limited time; at present, the annual output of solid clay bricks in the country is about 500 billion pieces, and 950,000 mu of cultivated land is destroyed and occupied every year.

Method used

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  • Sintering preparation for porous ceramic employing EAF dust
  • Sintering preparation for porous ceramic employing EAF dust

Examples

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Embodiment Construction

[0034] The waste slag produced in the coal mining process with a total volume ratio of 20% to 60% after mixing—coal gangue is crushed and ball-milled into fine particles, and then mixed with electric arc furnace dust collection ash with a volume ratio of not less than 20% of the total volume after mixing , and a small amount of other substances such as fly ash or lime powder mixed (less than 40% of the total volume ratio after mixing), and then adjusted with an appropriate dispersant (which can reduce the agglomeration of metal oxide nano-powder particles), adhesive (Binder) and additives (which can increase its porosity, that is, activity), uniformly mix them with a roller barrel, and then pass through a huge granulator to make granular particles with a particle size of less than 10.0cm, or through masonry After the block forming machine is formed into blocks such as hollow bricks, interlocking bricks, and heat-insulating bricks, etc. Then go through a kiln or rotary kiln, us...

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Abstract

The invention relates to a non-toxic porous ceramics whose preparation process comprises the steps of, mixing waste produced by the electric arc furnace during steel making process with disintegrated ball ground coal gangue powder as raw material, charging right amount of water into pelleting machine to make granulated particles, or forming block-shape through building block forming machine, subjecting the toxic metallic oxide and the carbon element in the coal gangue to reduction-oxidation reaction by high-sintering, collection high purity zinc oxide raw material, sintering for sterilization to substitute natural stone as artificial bone material.

Description

【Technical field】 [0001] The present invention relates to the recycling and environmental protection technology of detoxification and reuse of metallurgical harmful industrial waste, especially the technology of preparing porous ceramics from the E.A.F dust collection dust produced by the electric arc furnace in the steelmaking process. 【Background technique】 [0002] 1. E.A.F dust collector: [0003] At present, the electric arc furnaces of major steelmaking plants at home and abroad simultaneously produce a large amount of (30,000 tons / month E.A.F dust collection ash in the process of steelmaking, which contains a small amount of toxic heavy metals (zinc oxide (ZnO) 15.0% ~ 25.0%, lead oxide (PbO) 1.0% ~ 2.0%, cadmium oxide (CdO) 0.01%), and it is identified as hazardous industrial waste, which must be recycled and processed by major steelmaking plants according to regulations. In the past, these E.A.F Dust collected can only be treated as hazardous industrial waste, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/64B09B3/00C04B18/08C04B18/12C04B38/00C04B38/06
CPCY02W30/91
Inventor 孙文彬孙文郁
Owner 孙文郁
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