Method for separating antimony from hydrochloric acid-chloride salt solution

A solution and chloride salt technology, applied in the direction of improving process efficiency, can solve the problems of poor antimony selectivity, low antimony recovery rate, complex antimony process flow, etc., and achieve good antimony selectivity, high antimony recovery rate and easy operation. Effect

Active Publication Date: 2019-07-09
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the current technical problems in the separation of antimony from acidic solutions such as complex process flow, poor antimony selectivity, and low antimony recovery rate, the present invention provides a method for separating antimony in hydrochloric acid-chloride solution, which can not only efficiently select Separation of antimony, antimony recovery rate is high, and the process is simple and easy to operate

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  • Method for separating antimony from hydrochloric acid-chloride salt solution
  • Method for separating antimony from hydrochloric acid-chloride salt solution
  • Method for separating antimony from hydrochloric acid-chloride salt solution

Examples

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Effect test

Embodiment 1

[0037] The hydrochloric acid-ammonium chloride system leached the antimonite solution for treatment, in which the hydrochloric acid concentration was 30 g / L, the calcium chloride concentration was 200 g / L, the iron concentration was 10 g / L, and the antimony concentration was 30 g / L. A method for separating antimony from a hydrochloric acid-chloride salt solution may specifically include the following steps:

[0038] Step 1a. Oxidative precipitation: add chlorine to the above solution for oxidative precipitation, the reaction temperature is 30°C, the stirring speed is 300rpm, the reaction time is 0.5 hours, and the solution potential at the end of the reaction is controlled to be greater than 800mV (vs. SHE), so that the three in the solution The pentavalent antimony is oxidized to pentavalent antimony, and the pentavalent antimony is precipitated to precipitate the pentavalent antimony oxide, thereby obtaining the pentavalent antimony oxide precipitation slurry.

[0039] Step 2a, a...

Embodiment 2

[0042] The hydrochloric acid-calcium chloride system leached the stibnite solution, in which the concentration of hydrochloric acid was 40g / L, the concentration of calcium chloride was 250g / L, the concentration of iron was 20g / L, and the concentration of antimony was 60g / L. A method for separating antimony from a hydrochloric acid-chloride salt solution may specifically include the following steps:

[0043] Step 1b. Oxidative precipitation: Add chlorine to the above solution for oxidative precipitation. The reaction temperature is 40°C, the stirring speed is 300rpm, the reaction time is 1.5 hours, and the end point of the reaction is controlled to be greater than 900mV (vs. SHE), so that the three in the solution The pentavalent antimony is oxidized to pentavalent antimony, and the pentavalent antimony is precipitated to precipitate the pentavalent antimony oxide, thereby obtaining the pentavalent antimony oxide precipitation slurry.

[0044] Step 2b, aging and growing up: the pent...

Embodiment 3

[0047] The electrolytic solution of the hydrochloric acid-sodium chloride antimony refining system is processed, in which the concentration of hydrochloric acid is 30g / L, the concentration of sodium chloride is 150g / L, and the concentration of antimony is 40g / L. A method for separating antimony from a hydrochloric acid-chloride salt solution may include the following steps:

[0048] Step 1c. Oxidative precipitation: add chlorine to the above solution for oxidative precipitation, the reaction temperature is 50°C, the stirring speed is 300rpm, the reaction time is 1 hour, and the solution potential at the end of the reaction is controlled to be greater than 800mV (vs. SHE), so that the three in the solution The pentavalent antimony is oxidized to pentavalent antimony, and the pentavalent antimony is precipitated to precipitate the pentavalent antimony oxide, thereby obtaining the pentavalent antimony oxide precipitation slurry.

[0049] Step 2c, aging and growing up: aging the pentav...

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Abstract

The invention discloses a method for separating antimony from a hydrochloric acid-chloride salt solution. The method comprises the steps of adding an oxidizing agent into the hydrochloric acid-chloride salt solution, controlling reaction conditions, oxidizing trivalent antimony in the solution into pentavalent antimony, and precipitating the pentavalent antimony to separate out pentavalent antimony oxide to obtain pentavalent antimony oxide precipitation slurry; and aging the pentavalent antimony oxide precipitation slurry, crystallizing and growing the pentavalent antimony oxide in the pentavalent antimony oxide precipitation slurry, and then carrying out solid-liquid separation to obtain a pentavalent antimony oxide solid and an antimony-removed solution, thereby achieving separation ofthe antimony. According to the method, the antimony can be efficiently and selectively separated out, the recovery rate of the antimony is high, the process flow is simple, and the operation is easy.

Description

Technical field [0001] The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a method for separating antimony from a hydrochloric acid-chloride salt solution. Background technique [0002] At present, antimony smelting methods can be divided into two categories: fire antimony smelting and wet antimony smelting. Smelting antimony by pyrolysis is mainly a blast furnace volatilization smelting-reduction smelting method, that is, antimony trioxide is produced first, and then reduction smelting is carried out to produce crude antimony. However, this kind of antimony pyrolysis process has low metal recovery rate, high energy consumption and serious pollution. Especially low concentration SO 2 Both flue gas and a large amount of arsenic-alkali slag are the main environmental problems faced by antimony pyrolysis. [0003] Antimony hydrometallurgy is mainly divided into two methods: alkaline leaching and acid leaching. Alkaline leaching of ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02C22B3/44
CPCC22B3/44C22B30/02Y02P10/20
Inventor 张永禄揭晓武王振文郜伟阮书锋崔成旺
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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