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A low-temperature molten salt electrolytic clean metallurgy method and device for antimony

A low-temperature molten salt and electrolysis device technology, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problems of complex equipment and high energy consumption, and achieve the effects of short process, low energy consumption and pollution reduction

Active Publication Date: 2018-11-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a new method for preparing refined antimony from antimony-containing materials, reduce the temperature of antimony smelting, improve the problems of high energy consumption and complicated equipment in the current antimony smelting process, and reduce the impact of heavy metals on the smelting process. Environmental pollution, refining high-grade refined antimony in one step, increasing the direct yield of antimony, and recovering the associated sulfur resources in antimony concentrate

Method used

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  • A low-temperature molten salt electrolytic clean metallurgy method and device for antimony

Examples

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Effect test

Embodiment 1

[0027] The chemical composition of antimony concentrate A is (%): Sb 54.7, Fe 2.8, S 15.7, As 0.35, Pb 0.22, SiO 2 11.4, Au 87.5g / t. Weigh 100g antimony concentrate A and 20g Na respectively 2 S, 79.1g NaCl and 100.9g KCl. First add 20g Na 2 S, 79.1g NaCl and 100.9g KCl are mixed uniformly. After that, 80 g of the mixed molten salt and 100 g of antimony concentrate A were taken out and mixed uniformly. The mixed material is spread flat on the bottom of the furnace of the low-temperature molten salt electrolysis device through the antimony-containing material feed port, and then the remaining 120 g of the mixed molten salt is spread on the upper layer of the mixture through the inert molten salt feed port. Adjust the height of the anode guide rod so that the graphite anode is inserted into the inert molten salt on the upper layer, and the anode and cathode pole distance is 4cm. Turn on the power of the external resistance heating layer and heat up to 880°C. Turn on the pulse ...

Embodiment 2

[0029] The chemical composition of antimony concentrate B is (%): Sb 32.6, Fe 16.9, S 32.4, As 1.3, SiO 2 13.7, Pb0.17, Au 77.5g / t. Weigh 200g antimony concentrate B and 100g K respectively 2 S, 175.8g NaCl and 224.2g KCl. First put 100g K 2 S, 175.8g NaCl and 224.2g KCl are mixed uniformly. Then, 160 g of the antimony concentrate B was taken out from the mixed molten salt and mixed with 200 g of antimony concentrate B. The mixed material is spread flat on the bottom of the furnace of the low-temperature molten salt electrolysis device through the antimony-containing material feed port, and then the remaining 240 g of mixed molten salt is spread through the inert molten salt feed port on the upper layer of the mixture. Adjust the height of the anode guide rod so that the graphite anode is inserted into the inert molten salt on the upper layer, and the anode and cathode pole distance is 8cm. Turn on the power of the external resistance heating layer and heat up to 920°C. Tur...

Embodiment 3

[0031] The chemical composition of antimony concentrate C is (%): Sb 78.2, As 2.6, Fe 1.6, Pb 0.3. Weigh 100g antimony concentrate C and 15g Na respectively 2 S, 48.3g NaCl and 61.7g KCl. First add 15g Na 2 S, 48.3g NaCl and 61.7g KCl are mixed uniformly. Afterwards, 50 g of the antimony concentrate C is taken out from the uniformly mixed molten salt and mixed with 100 g of antimony concentrate C. The mixed material is spread flat on the bottom of the furnace of the low-temperature molten salt electrolysis device through the antimony-containing material feed port, and then the remaining 75 g of the mixed molten salt is spread flat on the upper layer of the mixture through the inert molten salt feed port. Adjust the height of the anode guide rod so that the graphite anode is inserted into the upper layer of inert molten salt, and the anode and cathode pole distance is 6cm. Turn on the power of the external resistance heating layer and heat up to 850°C. Turn on the pulse power...

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Abstract

The invention relates to a low-temperature fused salt electrolytic cleaning metallurgy method and device for antimony. The method comprises the steps that antimony-containing materials and inert molten salt are mixed and arranged in a low-temperature fused salt electrolyzer in a certain material arrangement mode, and low-temperature fused salt electrolytic smelting is conducted under the certain temperature and pulse current conditions. Along with low-temperature fused salt electrolysis, mixed molten salt in a hearth gradually forms a three-layer melt structure. The antimony-containing materials can be added from an antimony-containing material charging port, and obtained liquid antimony can be discharged from an antimony discharging port formed in the lower portion. Accordingly, the existing antimony concentrate pyrogenic attack temperature is greatly lowered, and high-grade antimony is produced through one step; compared with an existing antimony concentrate pyrometallurgy technology, the method has the advantages of being low in energy consumption, high in direct recovery rate of antimony, clean and environmentally friendly. The device is simple and practical, and a good antimony extraction metallurgy effect can be obtained by using the device in a matched mode.

Description

Technical field [0001] The invention relates to a clean metallurgical method and device for obtaining refined antimony by low-temperature molten salt electrolysis of antimony-containing materials, and belongs to the field of non-ferrous metal metallurgy. Background technique [0002] Antimony (Sb) is a silver-white brittle metal, which is an acid-resistant substance at room temperature. It is a kind of metal with a wide range of uses, known as "the hero of fire and fire prevention", "strategic metal", "metal hardener", "protective agent for fluorescent tubes and electronic tubes". [0003] The existing production methods of antimony metal can be divided into two categories: fire method and wet method. "Blast furnace volatilization smelting-reverberatory furnace reduction smelting" is currently the most important pyrotechnical antimony smelting process. This process first combines antimony sulfide concentrates or antimony-containing materials through briquetting or granulation, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/34C25C7/00C25C7/02
CPCC25C3/34C25C7/005C25C7/025
Inventor 杨建广南天翔丁龙杨建英李树超陈冰
Owner CENT SOUTH UNIV
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