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

A filter material, nickel-based technology, applied in the field of gas-phase magnesium purification based on nickel-based filter material, can solve the problems of low yield of high-purity magnesium, low preparation efficiency, high cost, etc., to simplify the production process, reduce the nucleation energy barrier, The effect of improving productivity

Active Publication Date: 2021-11-23
国科镁业科技(河南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain higher purity, the distillation method is generally carried out under vacuum conditions and at an evaporation temperature close to the melting point of Mg (650-700 ° C), so its preparation efficiency is low; the purity of crystalline magnesium in different temperature zones is different, generally only at a suitable temperature The crystalline magnesium is high-purity magnesium, so its high-purity magnesium yield is low; in order to obtain ultra-high-purity magnesium (99.999%-99.9999%), multiple distillations are required, so the cost is very high
Based on the above reasons, the vacuum distillation method cannot meet the needs of industrialized large-scale production.
[0005] In addition, the method of purifying magnesium in the prior art also has the method of using filter material to assist impurity removal by vapor deposition, but generally the filter material uses stainless steel fiber or the method of combining stainless steel fiber with copper fiber, and stainless steel is not suitable for the environment where the vapor pressure of magnesium is too high. Working conditions, suitable for low heating temperature - low temperature sublimation conditions, so the efficiency of magnesium purification is low, and the output of high-purity magnesium is extremely low

Method used

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  • A method and device for gas-phase magnesium purification based on nickel-based filter material
  • A method and device for gas-phase magnesium purification based on nickel-based filter material
  • A method and device for gas-phase magnesium purification based on nickel-based filter material

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Embodiment 1

[0083] Such as figure 2 Shown, a kind of device that comprises the gas phase magnesium purification of nickel base filter material, comprises electric furnace body 1, crucible 2, heating mechanism 3, thermocouple 4 and vacuum mechanism 5;

[0084] The crucible 2 includes a reaction zone 21, an impurity condensation zone 22 and a crystallization zone 23 arranged in sequence,

[0085] The reaction zone 21 is provided with a hopper 211,

[0086] The impurity condensation area 22 is provided with a filter assembly 221,

[0087] Described filter assembly 221 is provided with filter material, and described filter material is nickel foam, and the aperture of nickel foam is 40ppi, and the purity of nickel is more than 99.5%;

[0088] The crystallization zone 23 is provided with a crystallizer 231;

[0089] The heating mechanism 3 includes a first heating assembly 31, a second heating assembly 32 and a third heating assembly 33; the first heating assembly 31 heats the reaction zone...

Embodiment 2

[0096] A kind of device that comprises the gas-phase magnesium purification of nickel base filter material, and embodiment 1 difference is that described filter assembly 221 is arranged between No. 7 and No. 8 high-purity graphite pipe fittings.

Embodiment 3

[0098] A kind of device that comprises the gas-phase magnesium purification of nickel base filter material, and embodiment 1 difference is that the pore diameter of described nickel foam is 75ppi; Described crucible is integrally formed.

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Abstract

The invention provides a method for purifying magnesium in the vapor phase based on a nickel-based filter material. The method uses a nickel-based filter material to filter magnesium vapor. Under a certain temperature and vacuum degree, the nickel material does not react with the magnesium vapor on the one hand. It will not bring new impurities to the system; on the other hand, the nickel material has a special affinity with the impurities Al and Mn in the magnesium vapor, and can form a stable solid solution; at the same time, the nickel material can also be used as some impurities in the magnesium vapor The nucleation site lowers the nucleation energy barrier and enables some impurities to be deposited in advance to achieve removal. The method provided by the invention can be applied to industrialized large-scale gas-phase magnesium purification, while improving the production efficiency by an order of magnitude, the Mn content in magnesium is reduced to below 10ppm, the Al content is reduced to below 10ppm, and the Si content is below 20ppm. Non-metallic impurity elements such as F, Cl, S, etc. improve product purity, and the purity of the obtained magnesium is above 99.99%.

Description

technical field [0001] The invention belongs to the technical field of metal magnesium purification, in particular to a method and device for gas-phase magnesium purification based on a nickel-based filter material. Background technique [0002] Magnesium alloy has the advantages of low density, strong damping and shock absorption, excellent electromagnetic shielding performance and relatively low recycling cost. Therefore, it is regarded as "21st century green environmental protection engineering structural material" and an important strategic material. 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, etc.), and large content fluctuations. These chronic problems seriously deteriorate the performance of magnesium alloys, which in turn leads to its practical application far less than expected. [0003] There are two common...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/22C22B9/02
CPCC22B9/023C22B26/22
Inventor 单智伟杨博刘博宇王安毛路遥李姣刘飞畅治民
Owner 国科镁业科技(河南)有限公司
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