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Coal ash roller type fine extractive technique

A fly ash and rolling technology, applied in the direction of lithium carbonate;/acid carbonate, silver compound, silver compound, etc., can solve problems such as interference and complex composition

Inactive Publication Date: 2008-06-18
李文志 +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Its complex composition, relatively stable chemical properties, and the interference of dark reactions in simple extraction processes have become difficult problems in its fine development

Method used

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  • Coal ash roller type fine extractive technique

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Experimental program
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Effect test

Embodiment Construction

[0015] 1. Rolling layer stripping stripping process

[0016] The purpose of this process is to convert the solid matter extracted from fly ash into soluble matter to the greatest extent, and lay the material foundation for the rolling fine extraction process.

[0017] 1. Use industrial-grade strong acid (or waste acid) to leach and dissolve the basic oxides and secondary oxides in fly ash. If the fly ash is enriched with lanthanide rare earth oxides that can be extracted, it should be soaked with hydrochloric acid HCl solution; if the fly ash is enriched with actinide rare earth oxides that can be extracted, it should be used Sulphate H 2 SO 4 The solution is soaked.

[0018] 2. Following process 1, the remaining fly ash after solid-liquid separation and not less than two times of water washing is soaked with sodium hydroxide solution.

[0019] 3. After process 2, the remaining fly ash after solid-liquid separation and not less than two water washings is soaked with hydroc...

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Abstract

The invention relates to a powder coal ash rolling-type fine extraction method which can effectively peel and dissolve extractive, serially extract active silica, ferric hydroxide, iron oxide red, magnesium hydrate, calcium hydroxide, barium sulfate, lithium carbonate and lanthanide series and actinium series rare earth hydroxide with an enrichment amount >=0.01%, manganese, copper, zinc and gallium with an enrichment amount >=0.05%, and germanium dioxide, vanadium pentoxide, gold, silver, palladium and platinum metal with an enrichment amount >=0.0001% from the powder coal ash. The powder coal ash rolling-type fine extraction method has the advantages that the remainder ash of the powder coal ash after the treatment by the rolling-type fine extraction technique can be still comprehensively used for making brick and blending coagulation, thereby fully using the powder coal ash and realizing zero emission.

Description

technical field [0001] Fly ash rolling fine extraction technology is based on the overall inventive concept of comprehensive and in-depth development and utilization of fly ash, including efficient layer stripping and stripping of extractable substances in ash and fine extraction of the eluate. The fly ash logic development technology system. It is also the latest scientific research achievement of fly ash in development concept, development content and development means, and it has become an advanced stage of more scientific development and utilization of fly ash. technical background [0002] Fly ash is 86 kinds of elements enriched in coal. In the high temperature of burning coal powder, it is smelted into a vitreous residue with a particle size of 0.07-0.19mm. Its complex composition, relatively stable chemical properties, and the interference of dark reactions in the simple extraction process have become difficult problems in its fine development. Formed before this c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C01G49/02C01F5/14C01F11/46C01D15/08C01D3/04C01B33/113C01G31/02C01G17/02C01G5/00B09B3/00
Inventor 李文志
Owner 李文志
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