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Nickel base filter material-based gas phase magnesium purification method and device

A filter material and nickel-based technology, which is applied in the field of gas-phase magnesium purification based on nickel-based filter material, can solve the problems that the vacuum distillation method cannot meet the requirements of large-scale industrial production, the efficiency of magnesium purification is low, and the yield of high-purity magnesium is low. Reduced nucleation energy barrier, long service life, and cost reduction effects

Active Publication Date: 2020-02-25
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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  • Nickel base filter material-based gas phase magnesium purification method and device
  • Nickel base filter material-based gas phase magnesium purification method and device
  • Nickel base filter material-based gas phase magnesium purification method and device

Examples

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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 nickel base filter material-based gas phase magnesium purification method. The method is characterized in that a nickel base filter material is adopted to filter magnesium vapor, under a certain temperature and vacuum degree, on one hand, the nickel material does not react with the magnesium vapor, so that new impurities cannot be brought to a system; on the other hand, the nickel material and impurities Al and Mn in the magnesium vapor have special affinity, so that a stable solid solution can be formed; and meanwhile, the nickel material can be used as a site for nucleation of a certain of impurities in the magnesium vapor, so that the energy barrier of nucleation is reduced, the certain impurities are deposited in advance, and removal is achieved. According to the method, the method can be applied to industrial large-batch gas phase magnesium purification; the production efficiency is improved by an order of magnitude, and meanwhile, the Mn content in magnesium is reduced to 10 ppm or less, the Al content is reduced to 10 ppm or less, and the Si content is reduced to 20 ppm or less; and non-metal impurity elements such as F, Cl and S can be removed, so that the purity of a product is improved, and the purity of the obtained magnesium is 99.99% or above.

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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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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