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Method of preparing metal by electrolyzing solid metal sulfide in aqueous solution

A metal sulfide and aqueous solution technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of volatilization of toxic substances, high reaction temperature, complex equipment and process, etc., and achieve the effect of avoiding emissions, high electrolysis efficiency, and low cost.

Active Publication Date: 2018-08-03
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high reaction temperature of molten salt electrolysis and the additional need for inert gas protection, there are problems such as complex equipment and technology, and the possible volatilization of toxic substances at high temperatures, which limits it to a certain extent.

Method used

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  • Method of preparing metal by electrolyzing solid metal sulfide in aqueous solution
  • Method of preparing metal by electrolyzing solid metal sulfide in aqueous solution
  • Method of preparing metal by electrolyzing solid metal sulfide in aqueous solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for preparing a metal by electrolysis of a solid metal sulfide in an aqueous solution is carried out in the following steps:

[0047] Step 1: Press

[0048] After the copper sulfide raw material is ground into copper sulfide powder with a particle size of 20 μm, it is pressed under a pressure of 40 MPa for 2 minutes to obtain a porous sheet;

[0049] Step 2: Preparation for Electrolysis

[0050] (1) Place the porous sheet in a copper crucible, make the porous sheet closely contact with the copper crucible, then connect the copper crucible with a copper wire collector with a diameter of 0.2±0.01mm to make a cathode, and place a 13±0.1mm high-purity graphite The rod is connected with a copper wire collector with a diameter of 0.2±0.01mm to make an anode;

[0051](2) The sodium hydroxide of equal mass and deionized water are mixed to obtain 50wt% sodium hydroxide solution, and as electrolyte solution, electrolyte solution is put into the container of tetrahydrof...

Embodiment 2

[0057] A method for preparing a metal by electrolysis of a solid metal sulfide in an aqueous solution, the same as in Example 1, the difference lies in:

[0058] (1) the sulfide of step 1 adopts lead sulfide;

[0059] (2) Apply 2.5±0.1V between the two electrodes in step 3;

[0060] (3) In step 2, a platinum wire with a diameter of 0.5 ± 0.01mm and a purity of 99.95% is connected to a current collector of a copper wire with a diameter of 0.2 ± 0.01mm to make an anode;

[0061] (4) figure 2 It is the XRD analysis figure of the lead sulfide sample before the electrolysis of the present embodiment, image 3 It is the lead XRD analysis figure obtained after the electrolysis of the present embodiment. It can be seen from the figure that after electrolysis, lead sulfide is completely converted into metallic lead.

[0062] Other methods are the same.

Embodiment 3

[0064] A method for preparing a metal by electrolysis of a solid metal sulfide in an aqueous solution, the same as in Example 1, the difference lies in:

[0065] (1) the sulfide of step 1 adopts antimony sulfide;

[0066] (2) Figure 4 It is the XRD analysis figure of the sample of antimony sulfide before the electrolysis of the present embodiment, Figure 5 It is the XRD analysis figure of the antimony obtained after the electrolysis of the present embodiment. It can be seen from the figure that after the electrolysis, the antimony sulfide is completely converted into metal antimony simple substance;

[0067] Other methods are the same.

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Abstract

The invention provides a method of preparing a metal by electrolyzing a solid metal sulfide in an aqueous solution, and belongs to the metallurgy field of electrolyzing a solid metal sulfide. The method comprises the following steps of: grinding the metal sulfide raw material into metal sulfide powder, and then pressing the powder; putting a multi-hole sheet body in an electric conduction crucibleso as to enable the multi-hole sheet body and the electric conduction crucible to be tightly contacted, then connecting the electric conduction crucible to a current collector so as to prepare a cathode, and connecting a graphite rod or platinum wire to the current collector to prepare an anode; heating an alkali metal hydroxide aqueous solution or a saturated carbonate aqueous solution electrolyte to 75-125 DEG C, inserting the anode and cathode into the electrolyte, applying a voltage 1.8+ / -0.1V-2.5+ / -0.1V, electrolyzing for 4-8 hours at a constant voltage to obtain the electrolyzed cathode, cooling, carrying out ultrasonic oscillation cleaning, drying and packaging the obtained metal. The method has the beneficial effects that the metal sulfide can be smelted into the simple metal at low cost and high electrolysis efficiency in an environmental friendliness manner, and the method is simple and convenient in operation.

Description

technical field [0001] The invention relates to the field of electrolytic solid metal sulfide metallurgy, in particular to a method for preparing metal by electrolyzing solid metal sulfide in aqueous solution. Background technique [0002] Metal and alloy materials play an important role in the development of the national economy. National defense, science and technology, industry and agriculture, and daily life require a large number of various metal materials. In nature, except for a few precious metal elements, most metal elements exist as compounds, and often a variety of metal elements coexist, such as chalcocite, galena, stibnite, chalcopyrite, etc. Smelting these metal compounds into metals / alloys usually adopts two methods: thermal reduction method (fire method) and electrolysis method. my country's traditional industry uses metal sulfides to smelt metals mainly by pyromethods, using sintering pot sintering and roasting, blast furnace vulcanization smelting, vacuum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/02C25C1/12
CPCC25C1/12C25C7/02C25C1/18C25C1/20C25C5/02
Inventor 尹华意屈佳康谢宏伟宋秋实宁志强
Owner NORTHEASTERN UNIV LIAONING
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