A method and device for gas-phase magnesium purification based on pure iron filter material

A filter material and pure iron technology, applied in the field of gas-phase magnesium purification based on pure iron filter material, can solve the problems of low preparation efficiency, low efficiency of magnesium purification, low yield of high-purity magnesium, etc.
CN110724825BActive Publication Date: 2021-05-04国科镁业科技(河南)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
国科镁业科技(河南)有限公司
Publication Date
2021-05-04

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Abstract

The invention provides a gas-phase magnesium purification method based on a pure iron filter material. The method uses a pure iron filter material to filter magnesium vapor. On the one hand, pure iron will not react with magnesium vapor and will not bring new impurities to the system; on the other hand, the impurities Al and Mn in magnesium vapor have special affinity with iron and can form a stable solid solution with iron ; At the same time, pure iron can be used as the nucleation site of some impurities in the magnesium vapor, lowering the nucleation energy barrier, allowing some impurities to deposit in advance, and removing impurities. The method provided by the invention can be applied to industrial large-scale gas-phase magnesium purification, and the production efficiency of magnesium purification can be increased by an order of magnitude by increasing the temperature, so that the content of impurity Mn in the magnesium raw material is reduced to below 10 ppm, and the content of Al is reduced to below 10 ppm. The Ca content is reduced to below 20ppm, and at the same time, non-metallic impurity elements such as F, Cl, and S can be removed to obtain magnesium with a purity of more than 99.99%.
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Description

technical field

[0001] The invention belongs to the technical field of metal magnesium purification, and in particular relates to a method and device for gas-phase magnesium purification based on a pure iron filter material. Background technique

[0002] Magnesium and magnesium alloys are the lightest metal structural materials, and their density is about two-thirds of that of aluminum alloy and one-fifth of that of steel. Therefore, one of the important applications of magnesium alloys is energy saving and weight reduction in the automotive industry, rail transit and other fields. In addition, magnesium alloy also has the advantages of good electromagnetic shielding performance and excellent biocompatibility, and has bright application prospects in more functional fields. At present, in the field of magnesium purification, there are chronic problems such as low overall product purity (only 99.90%), many types of impurity elements (mainly containing Mn, Al, Ca, Si, Fe, Ni, ...

Claims

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