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Method for filtering and centrifugally separating mixture containing aluminum, silicon, iron and the like, removing impurities and carrying out purification

A technology of centrifugal separation and mixture, which is applied in the field of metallurgy, can solve the problems of high cost, strict requirements on raw material purity or impurity content, low efficiency, etc., and achieve the effect of high value, increasing value and profit, and increasing profit margin

Inactive Publication Date: 2020-02-28
刘旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the separation and purification methods for raw materials containing aluminum, silicon and impurities such as metallurgical products and waste materials can only deal with one impurity element at a time, and the efficiency is low, the cost is high, or the requirements for the purity of raw materials or impurity content are strict.

Method used

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  • Method for filtering and centrifugally separating mixture containing aluminum, silicon, iron and the like, removing impurities and carrying out purification

Examples

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Effect test

Embodiment 1

[0029] A method for filtering and centrifuging a mixture containing aluminum silicon ferrosilicon and the like and removing impurities and purifying, the steps are:

[0030] (1) Put a total of 200 kg of liquid aluminum-silicon mixture at 1600°C into the heat preservation container. Said mixed metals are reduced by metallurgical processes such as electrothermal smelting (or submerged arc furnace method, electric arc furnace method, fire method, etc.), or are melted from recycled materials containing metal elements such as waste aluminum, Or it is obtained by blending and melting, or other methods. The mixed metal is a mixture containing aluminum, silicon, iron and other metal elements. The content range of related elements is as follows: aluminum: 9%-90%, silicon: 9%-90%, iron: 0.1%-18%, titanium: 0%-10%, Calcium: 0%-10%, Carbon: 0%-10%, Oxygen: 0%-20%, Others: 0%-7%.

[0031] In this step, the mixture contains 45% aluminum, 45% silicon, 7% iron, and 2% titanium, and the othe...

Embodiment 2

[0042] A method for filtering and centrifuging a mixture containing aluminum silicon ferrosilicon and the like and removing impurities and purifying, the steps are:

[0043] (1) Put a total of 300 kg of liquid aluminum-silicon mixture at 2000°C into an insulated container, in which the mixture contains 57% aluminum, 38% silicon, 2.3% iron, and 1% titanium. Slag impurities, the inner wall of the heat preservation bag is made of ceramic heat insulation material.

[0044] (2) Control the cooling rate of the mixture to 30°C / min, and use the principle of segregation purification in the molten aluminum-silicon environment to allow purer silicon crystals to precipitate and grow.

[0045] (3) Collect the solid silicon product by filtering and centrifuging to obtain 61 kg of silicon product with a purity of 99.3%.

[0046] (4) The remaining liquid mixture is subjected to supergravity centrifugation, and gradually cooled and solidified. During the cooling process, solid phases such as...

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Abstract

The invention relates to a method for filtering and centrifugally separating a mixture containing aluminum, silicon, iron and the like, removing impurities and carrying out purification. The method includes the steps that (1), the liquid-state mixture containing the aluminum and the silicon is put in an insulated bag container; (2), the temperature operation interval of the mixture is controlled,and pure silicon crystals are precipitated and grow; (3), intermetallic compounds and other impurities are enriched and settle on the outer layer under the effect of centrifugal supergravity or pressurization, aluminum-silicon alloys on an interlayer are purified, and silicon solid phases are collected in a filtering and filtering and centrifuging manner; (4), the remaining liquid-state mixture issubjected to supergravity centrifuging and gradually cooled and solidified; and (5), solidified products are stripped in a mechanical or manual manner, and the multiple high-grade products are obtained at low cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to valuable metal separation and recovery technology, in particular to a method for filtering and centrifuging a mixture containing aluminum-silicon-ferrosilicon and the like and removing impurities and purifying it. Background technique [0002] At present, the separation of mixtures (and impurities) containing aluminum, silicon, etc. has a wide range of application scenarios. In research, the directional solidification method is used to separate the silicon in the aluminum-silicon-containing metal liquid, but this method has low production efficiency, high power consumption and high cost, and expensive equipment. Iron removers containing manganese and other elements are also used in industry to remove iron impurities in aluminum or aluminum alloys. The iron removers used in this method have high costs and limited effects. [0003] As the overall advantages of the metallurgical te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/02C22B21/00C21B11/00C01B33/037B01D36/04
CPCB01D36/045C01B33/037C21B11/00C22B9/02C22B9/023C22B21/0084Y02P10/20
Inventor 刘旭
Owner 刘旭
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