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Method for preparing metal and magnesium sulfide with metal sulfide

A metal sulfide, alkali metal chloride technology, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of high energy consumption, large safety production risks, etc., to reduce the impurity content, simplify the subsequent treatment process, and avoid reoxidation. Effect

Active Publication Date: 2018-06-05
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method consumes a lot of energy, and there is a great risk of safety production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put the commercially available ZnS powder into the graphite crucible and wind it on the molybdenum wire as the cathode, use the graphite rod as the anode, and use MgCl with a molar ratio of 1:1 2 The molten mixture of NaCl and NaCl is the electrolyte. In an argon atmosphere, the temperature is 700 ° C, the voltage is 1.4 V, and the electrolysis is performed for 1 hour. After the electrolysis is completed, the cathode graphite crucible is lifted from the molten salt liquid level, and cooled to room temperature in the electrolytic cell Finally, the product is taken out; the cathode product is metal zinc ball and magnesium sulfide, and after the metal zinc is separated, the magnesium sulfide is obtained after ultrasonic cleaning with dimethyl sulfoxide.

Embodiment 2

[0015] Commercially available Al 2 S 3 The powder was pressed under 6MPa into a diameter of 20mm and a thickness of 3mm. After sintering in argon at 700°C for 2 hours, it was put into a stainless steel crucible, and then a stainless steel wire was wound on a stainless steel rod as a cathode, a graphite rod as an anode, and molten MgCl 2 As an electrolyte, in a nitrogen atmosphere, the temperature is 750 ° C, the voltage is 1.0 V, and the electrolysis is performed for 1.5 hours. After the electrolysis is completed, the cathode stainless steel crucible is lifted from the molten salt liquid level, and the product is taken out after cooling to room temperature in the electrolytic cell; the cathode product Metal aluminum balls and magnesium sulfide are obtained by separating the metal aluminum and ultrasonically cleaning with dimethyl sulfoxide to obtain magnesium sulfide.

Embodiment 3

[0017] Will commercially available Sb 2 S 3 The powder is put into a titanium crucible, and then a titanium wire is wound on a titanium rod as a cathode, a graphite rod is used as an anode, and MgCl with a molar ratio of 1:1 2 : The molten mixture of LiCl is the electrolyte. In a helium atmosphere, the temperature is 600°C, the voltage is 1.8V, and the electrolysis is performed for 2 hours. After the electrolysis is completed, the cathode titanium crucible is lifted out of the molten salt liquid level, and cooled to room temperature in the electrolytic cell Then remove the product. The cathode products are metal antimony balls and magnesium sulfide. After the metal antimony is separated, magnesium sulfide is obtained after ultrasonic cleaning with dimethyl sulfoxide.

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Abstract

The invention discloses a method for preparing metal and magnesium sulfide with metal sulfide. The method is characterized in that metal sulfide powder or a metal sulfide sheet formed by pressing is compounded with a current collector to be used as a cathode, graphite is taken as an anode, electrolyzation is performed for 1-4h in molten magnesium chloride or a mixture of magnesium chloride and alkali metal chloride with the working temperature being 400-750 DEG C and the electrolysis voltage being 1.0-2.6V, wherein the working temperature is higher than a melting point of a corresponding metalproduct, at the inert atmosphere, and a cathode product is corresponding molten metal and the magnesium sulfide; after the product is cooled, and separated metal is taken out, ultrasonic cleaning isperformed by adopting dimethyl sulfoxide to obtain the magnesium sulfide. The invention provides the method for preparing metal and magnesium sulfide with metal sulfide, which is low in energy consumption and safe in process and is environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing metal and magnesium sulfide from metal sulfide, in particular to a method for preparing low melting point metal and magnesium sulfide. Background technique [0002] At present, the common non-ferrous metals mainly come from sulfides, such as sphalerite (mainly ZnS), galena (mainly PbS), stibnite (mainly Sb 2 S 3 ), bismuthite (mainly composed of Bi 2 S 3 ), pyrite (mainly composed of FeS 2 ), chalcopyrite (the main component is CuFeS 2 ), chalcocite (the main component is Cu 2 S), copper blue (the main component is CuS) and so on. Since sulfide cannot be directly reduced by carbon, most of the existing sulfide ores need to go through processes such as roasting, sintering and smelting, which not only has a long process and high energy consumption, but also involves SO 2 and CO 2 Lots of emissions. At present, there are two main smelting technologies for metal sulfides as raw materials, namely fire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/00C25B1/18
CPCC25B1/18C25C3/00
Inventor 李伟刘志强王东兴曹洪杨郭秋松朱薇张魁芳高远
Owner GUANGDONG INST OF RARE METALS
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