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Comprehensive utilization of coal gangue for producing alumina and electrolytic aluminium

A technology of electrolytic aluminum and coal gangue, which is applied in the fields of chemical industry and metallurgical industry, can solve the problems of inability to realize industrialized production, dumping of fly ash, and poor economic benefits, and achieve environmental protection, improved economic benefits, and strong feasibility Effect

Inactive Publication Date: 2005-11-09
康仁
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the resulting 40% Al 2 o 3 However, the fly ash was dumped in vain, and caused pollution to the environment; and the special manufacture of Al 2 o 3 Many manufacturers still start from coal gangue and produce "fly ash" through a series of processes such as crushing-balling-calcination-re-crushing
Thus, power generation and production of Al 2 o 3 The cost is very high, resulting in the use of coal gangue to produce Al 2 o 3 The economic benefit is too poor to realize industrialized production

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  • Comprehensive utilization of coal gangue for producing alumina and electrolytic aluminium
  • Comprehensive utilization of coal gangue for producing alumina and electrolytic aluminium
  • Comprehensive utilization of coal gangue for producing alumina and electrolytic aluminium

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Embodiment Construction

[0009] Illustrate principle of the present invention and technological process in conjunction with accompanying drawing embodiment as follows:

[0010] The technical scheme of the present invention is made of Al by coal gangue power generation process and fly ash 2 o 3 Process and electrolytic aluminum production process. The electricity produced by the gangue power plant is used as the energy source for electrolytic aluminum and other power consumption, and the fly ash produced is used as the energy source for the production of Al 2 o 3 Raw material, Al 2 o 3 It is also the raw material of electrolytic aluminum, so the main raw material entering this system is coal gangue. After various processes, the main products coming out of this system are aluminum hydroxide, aluminum oxide and electrolytic aluminum.

[0011] (1) Coal gangue power generation: Coal gangue or aluminum-containing low-quality coal is crushed and sent to the circulating fluidized bed boiler of the power ...

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Abstract

The present invention discloses a method for comprehensively-utilizing coal gauge to produce alumnia and electrolytic aluminium, and its technical scheme is that the coal gangue power generation process, electrolytic aluminium process and improved production proces sof Al2O3 by using flyash are combined together, the lectricity produced by coal gangue power plant, can be used as energy source for producing electrolytic aluminium and other power equipments, and the flyash produced by power plant can be used as raw material for producing Al2O3, and the Al2O3 also can be used as raw material for producing electrolytic aluminium.

Description

Technical field: [0001] The invention belongs to the fields of chemical industry and metallurgy industry, and relates to a production process for comprehensively utilizing coal gangue to produce alumina and electrolytic aluminum. Background technique: [0002] At present, the method of producing alumina in the world is basically to use bauxite rich ore to produce Al(OH) 3 Intermediate step to produce Al 2 o 3 This method is called the alkali process, mainly including the Bayer method, the sintering method and the combined method of the two. Due to the reduction of bauxite resources, the use of coal gangue to produce Al began in the 1970s. 2 o 3 After that, acid production of Al gradually appeared 2 o 3 Technology and clinker self-powdering method to extract Al(OH) 3 Further processing and manufacturing of Al 2 o 3 Technology. For the aluminum smelting process of low-grade ore, the method of producing alumina by acid method has the advantage of being able to process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/08C25C3/06
Inventor 康仁
Owner 康仁