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Application of pure iron filter material in gas phase magnesium purification and its production system

A filter material and pure iron technology, applied in the field of magnesium purification production system, can solve the problems of high cost, low preparation efficiency, difficult to produce magnesium, etc., and achieve the effect of improving efficiency, simple structure, and convenient construction

Active Publication Date: 2021-11-05
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

The advantage of the former is that it can realize large-scale purification of raw magnesium, but since the refining agent does not react with impurity elements such as Mn, Al, Fe, and Ni that reduce magnesium ingots, it is difficult to produce magnesium with a purity of more than 99.95%; the latter has the advantage It is possible to prepare ultra-high-purity magnesium with a purity of up to 99.9999% (excluding Zn content). The disadvantage is that the preparation efficiency is low and the cost is high, which cannot meet the needs of large-scale industrial production.
[0004] Chinese patents CN203429230U, CN208562489U, and CN201024206Y mention that "catchers", "interceptors" or "filters" are set at the mouth of the Pidgeon method reduction tank, and some special geometric structures are set at the mouth of the Pidgeon method reduction tank to intercept dust or certain Some pre-condensates, but the overall purification effect is limited, and it is impossible to remove one or several impurities in a targeted manner
[0005] Patent CN206512263U uses graphite to make a filter device, which is placed between the Pidgeon method reduction tank and the condenser, and has a filtering effect on Mn, but high-purity graphite is easy to oxidize and fail at high temperature
Although the patent CN205368470U mentions that there are fillers in the filter, it does not specify the type of material
[0006] Patent JP2018145480A provides an effective high-purity magnesium purification method and purification equipment that discloses the use of stainless steel fibers and copper fibers as filter materials. However, stainless steel is not suitable for conditions where the vapor pressure of magnesium is too high, and is suitable for low heating temperatures—low temperature sublimation Therefore, the heating temperature of the system is lower at 430-550°C, the efficiency of magnesium purification is low, and the output of high-purity magnesium is extremely low

Method used

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  • Application of pure iron filter material in gas phase magnesium purification and its production system
  • Application of pure iron filter material in gas phase magnesium purification and its production system
  • Application of pure iron filter material in gas phase magnesium purification and its production system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like Figure 4 As shown, a gas-phase magnesium purification system comprising a pure iron filter material includes a crucible device 1, a magnesium vapor channel 2, a dust removal device 3 and a vacuum device 4 connected in sequence;

[0051] The crucible device 1 is provided with an electric furnace device 5;

[0052] The crucible device 1 is provided with a hopper mechanism 11;

[0053] A filter mechanism 21 and a crystallization mechanism 22 are sequentially arranged in the magnesium vapor channel 2;

[0054] The filter mechanism 21 is provided with a pure iron filter material;

[0055] The crystallization mechanism 22 is provided with a cooling device 6;

[0056] The pure iron filter material is metal iron foam; the purity of the metal foam iron is above 99.5%, and the pore diameter of the foam metal iron is 30ppi.

Embodiment 2

[0058] A gas-phase magnesium purification system comprising a pure iron filter material, comprising a crucible device 1, a magnesium vapor channel 2, a dust removal device 3 and a vacuum device 4 connected in sequence;

[0059] The crucible device 1 is provided with an electric furnace device 5;

[0060] An insulating layer 7 is arranged between the crucible device 1 and the electric furnace device 5;

[0061] The crucible device 1 is provided with a hopper mechanism 11;

[0062] A filter mechanism 21 and a crystallization mechanism 22 are sequentially arranged in the magnesium vapor channel 2;

[0063] A heating device is arranged outside the magnesium vapor channel 2; the heating device is divided into two sections, the heating device is divided into two sections, and the filtering mechanism 21 is arranged between the first section and the second section;

[0064] The filter mechanism 21 is provided with a pure iron filter material;

[0065] The crystallization mechanism ...

Embodiment 3

[0068] A gas-phase magnesium purification system comprising a pure iron filter material, comprising a crucible device 1, a magnesium vapor channel 2, a dust removal device 3 and a vacuum device 4 connected in sequence;

[0069] The crucible device 1 is provided with an electric furnace device 5;

[0070] An insulating layer 7 is arranged between the crucible device 1 and the electric furnace device 5;

[0071] The crucible device 1 is provided with a hopper mechanism 11;

[0072] A heating device is arranged outside the magnesium vapor channel 2;

[0073] A filter mechanism 21 and a crystallization mechanism 22 are sequentially arranged in the magnesium vapor channel 2;

[0074] The filter mechanism 21 is provided with a pure iron filter material;

[0075] The crystallization mechanism 22 is provided with a cooling device 6;

[0076] The pure iron filter material is iron fiber; the purity of the iron fiber is above 99.5%, and the aperture of the iron fiber is 100-400 mesh....

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Abstract

The invention provides an application of a pure iron filter material in gas-phase magnesium purification. In the process of gas-phase magnesium purification, magnesium vapor passes through the pure iron filter material, and impurities Al and Mn in the magnesium vapor form stable ions with iron in advance before the magnesium condenses. solid solution, so as to remove the magnesium vapor; in addition, the pure iron filter material can be used as the nucleation site of some impurities, reduce the nucleation energy barrier of some impurities, thereby providing attachment sites for these impurities, so that the impurities are condensed and enriched in advance , out of the magnesium vapor system; and the pure iron filter material can also remove part of the impurities through physical adsorption; the pure iron filter material of the present invention can effectively remove the impurities in the magnesium vapor through various effects, greatly improving the magnesium content. Purity, the purity of the obtained magnesium is above 99.99%. The gas-phase magnesium purification production system comprising pure iron filter material provided by the present invention has a simple structure, is convenient to set up, is suitable for large-scale industrial production, can effectively improve the efficiency of magnesium purification, and reduce the cost of magnesium purification.

Description

technical field [0001] The invention belongs to the technical field of metal magnesium purification, and in particular relates to the application of a pure iron filter material in gas phase magnesium purification and a magnesium purification production system containing the 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%)...

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 单智伟杨博王鹏飞刘博宇毛路遥王安
Owner 国科镁业科技(河南)有限公司
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