A method of aluminium slag reduction to obtain metal aluminium

A technology of metal aluminum and aluminum slag, applied in the field of reducing metal aluminum, can solve the problems of long reaction time, increased cost, lengthy process, etc., and achieve the effects of short reaction time, cost saving and output time saving

Active Publication Date: 2015-06-10
陈怡雯
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Problems solved by technology

[0004] However, the reaction time is too long (at least 2 hours), and a high temperature of 1600° C. is required, which not only lengthens the process, but also consumes energy and increases costs.

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  • A method of aluminium slag reduction to obtain metal aluminium

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Embodiment Construction

[0019] figure 1 It is a flowchart showing the method of reducing metallic aluminum from aluminum slag according to the present invention.

[0020] Please refer to figure 1 , the steps of the method for reducing metal aluminum from aluminum slag of the present invention are: comprising an aluminum slag purification step and a reduction step.

[0021] The aluminum slag purification step includes a dealkalization step S1, a rinsing step S2, and a reaction and generation step S3 of aluminum complexes and compounds.

[0022] Dealkalization step S1 is to put 1Kg of primary and secondary aluminum slag into methanol-n / ethanol-m mixed solution, methanol with a purity of more than 95% or ethanol with a purity of more than 95% for dealkalization. Next reaction, the reaction time is controlled within 10-15 minutes to produce dealkalized primary and secondary aluminum slag; wherein, the n:m ratio of methanol-n / ethanol-m mixed solution can be 1:1, 1: 2. 1:4 or 1:8.

[0023] Rinsing step...

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Abstract

A method of aluminium slag reduction to obtain metal aluminium is disclosed. The method includes an aluminium slag purification step and a reduction step, wherein the aluminium slag purification step includes a dealkalization step, a rinsing step, and a step of generating aluminum complexes and compounds by reactions; and the reduction step includes a metal aluminium reduction step, a metal aluminium screening step and a metal aluminium processing step. The method is short in reaction time, saves the cost, dissolves other internal substance other than the metal aluminum, screens by a simple and convenient manner utilizing liquid and solid differences, and saves the output time of the metal aluminium.

Description

technical field [0001] The invention relates to a method for reducing metallic aluminum, in particular to a method for reducing metallic aluminum from aluminum slag. Background technique [0002] After the domestic aluminum recycling industry sorts the metal aluminum in the aluminum slag, there are 15,000 metric tons of waste secondary aluminum slag every year. In addition to alumina, the secondary aluminum slag also contains residual metal aluminum and easy-to-use If the aluminum nitride, aluminum carbide and some salt solvents reacted with water are disposed of directly, there will be a considerable degree of pollution to the environment. [0003] The currently known technology is to impregnate secondary aluminum slag with 1M potassium hydroxide, at a solid-to-liquid ratio of 1:10, and after impregnating at a temperature of 80°C for 2 hours, the aluminum nitride, aluminum carbide, metal aluminum and Sodium ions, etc., will be dissolved in the alkaline solution, and react ...

Claims

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Application Information

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IPC IPC(8): C22B21/02C22B7/00
CPCY02P10/20
Inventor 陈怡雯吕芳贤陈修成
Owner 陈怡雯
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