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Process of producing regenerative aluminium oxide by floatation method

A technology of alumina and flotation, which is applied in the direction of alumina/hydroxide, flotation, solid waste removal, etc., can solve the problems of alumina resource loss, only discharge, and environmental pollution, and reduce the aluminum smelting Cost, benefit-enhancing effect

Inactive Publication Date: 2003-11-12
邹建明
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Discarding these wastes will not only pollute the environment, but also cause the loss of alumina resources
However, these wastes can only be discharged at present, and there is no report on the effective recovery of alumina from these wastes.
To date, flotation methods have also not been used to recover secondary alumina from waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Example Take 10 tons of alumina-containing waste from Guizhou Aluminum Plant. After analysis, it contains 10% carbon, 3% silicon, and about 3% iron. When processing, it should be crushed into 1-5cm crumbs firstly, and then crushed to obtain particles of -30 mesh to -150 mesh. This fine material is sent into flotation cell, under stirring, intermittently adds 180kg kerosene, 260kg dodecylamine salt, 140kg cetyl sulfate, No. 2 pinic acid alcohol 6kg, through 12 hours flotation. The slag generated during flotation is discharged. After the regenerated alumina passed the test, it was dehydrated by centrifugation to keep the water content below 15%, and then dried in an externally heated rotary kiln for 2 hours to obtain 8.3 tons of regenerated alumina product. The product contains some fluoride salts, which are beneficial to the production of electrolytic aluminum and do not need to be removed.

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Abstract

The present invention relates to a process of producing regenerated alumina by floatation method, which it includes the following steps: collecting waste material containing alumina, breaking and pulveriling it, adding floatation agent to make intermittent floatation to obtain regenerated alumina, after floatation is completed, making water phase and solid phase separation, dehydrating regenerated alumina obtained by floatation, finally drying the dehydrated regenerated alumina. Said product can be used as raw material to produce the aluminum ingot or alloy aluminium with Ao-grade and below said grade, and can effectively reduce aluminium-smelting cost.

Description

[0001] Field [0002] This invention relates to the production of non-ferrous metals and, more particularly, to the processing of waste materials for the production of non-ferrous metal compounds. Background technique [0003] As we all know, "flotation" is a sorting method to float some or some minerals from the pulp according to the different physical and chemical properties of various minerals. [0004] In the production process of electrolytic aluminum smelting, a large amount of alumina waste will be produced, mainly including the ground waste at the bottom of the electrolytic cell and under the busbar, the waste of the overhaul tank, the dust waste, the waste in the ditch, and the waste in the dust collection system. Waste, and discarded anode fire eye carbon slag and so on. Discarding these waste materials will not only pollute the environment, but also cause the loss of alumina resources. However, these wastes can onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C01F7/02
Inventor 邹建明
Owner 邹建明
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