Method for centrifugally removing harmful elements and impurities in iron-containing mixture

A technology of harmful elements and mixtures, applied in the field of metallurgy, can solve the problems of no harmful elements and impurities removed by centrifugation, strict requirements on raw material purity or impurity content, and high cost, so as to increase product profits, high product value, and increase efficiency Effect

Inactive Publication Date: 2020-03-24
武翠莲
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, most of the current conventional methods can only process one impurity element at a time, and have low efficiency, high cost, or strict requirements on raw material purity or impurity content.
[0003] Through the applicant's careful search, there is no technical literature that uses the centrifugation method of this patent application to remove harmful elements and impurities in the metal mixture

Method used

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  • Method for centrifugally removing harmful elements and impurities in iron-containing mixture

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Embodiment 1

[0030] A method for centrifugally removing harmful elements and impurities in iron-containing mixtures, the steps are:

[0031] ⑴Put 1000kg of molten mixture at 2400°C into a vertical centrifugal rotating device, in which the molten mixture contains 51% silicon, 42% aluminum, 4% iron, and 1.5% titanium, and the others contain Slag impurities, the inner wall of the vertical centrifugal rotating device is made of ceramic material.

[0032] (2) Completely place the molten mixture in the vertical centrifugal rotating device, control the cooling rate of the molten mixture to 30°C / min, and the centrifuge temperature to 2200°C to allow the solid phase compounds to precipitate and grow;

[0033] (3) Apply a supergravity centrifugal field to the molten mixture, the supergravity coefficient is 2500g, and gradually cool down to solidification; during the cooling process, the sedimentation and enrichment of the various substances of the compound in the periphery of the supergravity field,...

Embodiment 2

[0036] A method for centrifugally removing harmful elements and impurities in iron-containing mixtures, the steps are:

[0037] (1) A total of 200kg of molten mixture at 1700°C is put into a horizontal centrifugal rotating device, in which the molten mixture contains 61% of aluminum, 27% of silicon, 9% of iron, and 2.5% of titanium, and the others contain Slag impurities, the inner wall of the horizontal centrifugal rotating device is made of fire-resistant and heat-insulating materials.

[0038] ⑵The molten mixture is completely placed in the horizontal centrifugal rotating device, the cooling rate of the molten mixture is controlled to 5°C / min, and the centrifugation temperature is 1600°C, so that the solid phase compounds can precipitate and grow.

[0039] (3) Apply a supergravity centrifugal field to the molten mixture, and gradually cool down to solidification. During the cooling process, substances such as compounds settle and enrich on the periphery of the hypergravity...

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Abstract

The invention relates to a method for centrifugally removing harmful elements and impurities in an iron-containing mixture. The method comprises the following steps that (1), the molten mixture at thetemperature of exceeding 650 DEG C is put into a centrifugal rotating device; (2), the centrifugal rotating device completely contains the molten mixture, and intermetallic compound crystals are precipitated and grow up; (3), centrifugal separation treatment is carried out on the molten mixture manufacturing supergravity field in the device; and (4), various products are stripped by using a manual or mechanical method, and subsequent remelting and ingot casting or refining are carried out. According to the method, substances such as solid-phase compounds are precipitated when the mixture is subjected to liquid phase cooling, the mixture and the impurities are separated by means of the supergravity effect generated by centrifugal rotating motion by utilizing the difference between the density of the intermetallic compounds and the like and the density of the liquid-phase metal, and then a plurality of products are obtained through the method of settling, floating, peeling and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to the impurity removal and purification of mixed metals, in particular to a method for centrifugally removing harmful elements and impurities in iron-containing mixtures. Background technique [0002] In industry, the separation and purification of mixtures containing iron and other harmful elements and impurities are usually treated with refining agents containing manganese and other elements. The iron remover used in this method is high in cost and limited in effect. Although the currently widely used metallurgical technology of aluminum-silicon and other alloys by electrothermal method (fire method) has certain overall advantages, impurities such as iron, titanium, calcium, and carbon are inevitably brought into the electrothermal smelting process, which greatly affects the downstream of aluminum and silicon. The performance of high-value products restricts the application marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/02C22B21/06C22C21/02C22C28/00
CPCC22B9/02C22B21/06C22C21/02C22C28/00Y02P10/20
Inventor 武翠莲
Owner 武翠莲
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