Melt composite treatment agent for segregation method refined aluminium purification and preparation method thereof

A technology of melt composite treatment and segregation method, which is applied in the field of metal materials and metallurgy to achieve the effect of convenient operation, low cost and continuous removal of impurities

Inactive Publication Date: 2015-08-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare high-efficiency refining agents for the removal of elements such as Ti, V and Ga

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh a certain weight of primary aluminum, heat it to melt, raise the temperature to above 720°C, and keep it warm for 0.5 hours. Sprinkle or blow the melt composite treatment agent of 1% by weight of the aluminum melt into the molten aluminum, and stir while adding to make the flux fully contact with the molten aluminum. After smelting and settling for 30 minutes, the contents of Ti, Ga, V, etc. in the aluminum melt changed significantly, among which the content of Ti decreased from 0.0179% to 0.0070%, the content of Ga decreased from 0.0168% to 0.0138%, and the content of V decreased from 0.0073 % down to 0.0001%.

Embodiment 2

[0019] Weigh a certain weight of primary aluminum, heat it to melt, raise the temperature to above 720°C, and keep it warm for 0.5 hours. Put or blow the melt composite treatment agent of 1.8% by weight of the aluminum melt into the molten aluminum, and stir while adding, so that the flux is in full contact with the molten aluminum. After smelting and settling for 30 minutes, the contents of Ti, Ga, V, etc. in the aluminum melt changed significantly, among which the content of Ti decreased from 0.0173% to 0.0084%, the content of Ga decreased from 0.0171% to 0.0123%, and the content of V decreased from 0.0071% % down to 0.0002%.

Embodiment 3

[0021] Weigh a certain amount of primary aluminum, heat and melt it, raise the temperature to above 720°C, and keep it warm for 0.5 hours. Put or blow the melt composite treatment agent of 2.7% by weight of the aluminum melt into the molten aluminum, and stir while adding to make the flux fully contact with the molten aluminum. After smelting and settling for 30 minutes, the content of Ti, Ga, V, etc. in the aluminum melt changed significantly, among which the content of Ti decreased from 0.0176% to 0.0071%, the content of Ga decreased from 0.0166% to 0.0142%, and the content of V decreased from 0.0078% down to 0.0001%.

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PUM

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Abstract

The invention provides a melt composite treatment agent for segregation method refined aluminium purification and a preparation method thereof. The melt composite treatment agent is composed of sodium chloride, potassium chloride, sodium fluoroaluminate, calcium fluoride and borax. The melt composite treatment agent can be obtained by heating the sodium chloride, the potassium chloride, the sodium fluoroaluminate, the calcium fluoride and the borax respectively, conducting mixing according to the ratio and then conducting ball milling. A good effect can be achieved when the additive amount of the borax in the melt composite treatment agent is 1-3% of the weight of aluminum melt to be treated. The components in the melt composite treatment agent can effectively remove impurity elements, Ti, Ga and V, in the aluminium melt; the quality of crude aluminum is improved, and the purification efficiency of a segregation method is improved. The melt composite treatment agent for segregation method refined aluminium purification and the preparation method thereof have the advantages that the operation technology is simple, and the cost is low.

Description

technical field [0001] The invention relates to a metal material and technology in the field of metallurgy, in particular to a melt compounding treatment agent for refining refined aluminum by segregation method and a preparation method thereof. Background technique [0002] Segregation method is an important aluminum purification method. Compared with the traditional three-layer electrolyte method, the segregation method has high efficiency, low energy consumption and low investment for purifying refined aluminum. The removal efficiency of each impurity element is determined by its segregation ability in aluminum, usually characterized by its segregation coefficient K. The segregation coefficient K refers to the concentration C of impurity elements in the solid phase at a certain temperature s and the concentration C in the liquid phase in equilibrium with l The ratio of K=C s / C l . The impurity elements with K<1 are enriched in the liquid phase and can be easily ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/06C22B9/10
Inventor 张佼孙宝德东青万祥辉戴永兵韩延峰
Owner SHANGHAI JIAO TONG UNIV
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