A method for separating antimony in hydrochloric acid-chloride solution

A technology of solution and chloride salt, applied in the direction of improving process efficiency, etc., can solve the problems of complicated antimony process, poor antimony selectivity, low antimony recovery rate, etc.

Active Publication Date: 2021-09-14
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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  • A method for separating antimony in hydrochloric acid-chloride solution
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  • A method for separating antimony in hydrochloric acid-chloride solution

Examples

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Embodiment 1

[0037] The hydrochloric acid-ammonium chloride system leaching the stibnite solution is treated, wherein the concentration of hydrochloric acid is 30g / L, the concentration of calcium chloride is 200g / L, the concentration of iron is 10g / L, and the concentration of antimony is 30g / L. A method for separating antimony in a hydrochloric acid-chloride solution may specifically comprise the following steps:

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

[0039] Step 2a, aging and gro...

Embodiment 2

[0042] The hydrochloric acid-calcium chloride system leaching antimonite solution is processed, wherein the concentration of hydrochloric acid is 40g / L, the concentration of calcium chloride is 250g / L, the concentration of iron is 20g / L, and the concentration of antimony is 60g / L. A method for separating antimony in a hydrochloric acid-chloride solution may specifically comprise the following steps:

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

[0044] Step 2b, aging and gro...

Embodiment 3

[0047] The electrolyte of the hydrochloric acid-sodium chloride antimony electrolytic refining system is treated, wherein 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 in a hydrochloric acid-chloride solution may comprise the following steps:

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

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

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Abstract

The invention discloses a method for separating antimony in a hydrochloric acid-chlorine salt solution, comprising: adding an oxidizing agent to the hydrochloric acid-chlorine salt solution, controlling the reaction conditions, oxidizing trivalent antimony in the solution to pentavalent antimony, and making the pentavalent antimony Antimony is precipitated to precipitate pentavalent antimony oxides, thereby obtaining pentavalent antimony oxide precipitation slurry; aging the pentavalent antimony oxide precipitation slurry to allow the pentavalent antimony oxide crystals to grow, and then solidifying Liquid separation, so as to obtain the pentavalent antimony oxide solid and the solution after antimony removal, that is, to realize the separation of antimony. The invention not only can efficiently and selectively separate antimony and has a high recovery rate of antimony, but also has simple technological process and easy operation.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal hydrometallurgy, in particular to a method for separating antimony in a hydrochloric acid-chloride solution. Background technique [0002] At present, antimony smelting methods can be divided into two categories: fire antimony smelting and wet antimony smelting, and fire antimony smelting is the main method. Antimony smelting by fire method is mainly the blast furnace volatilization smelting-reduction smelting method, that is, antimony trioxide is produced first, and then antimony is produced by reduction smelting to produce crude antimony. especially low concentrations of SO 2 Flue gas and a large amount of arsenic-alkali slag are the main environmental problems faced by pyro-method antimony smelting. [0003] Antimony smelting by wet method is mainly divided into two methods: alkaline leaching and acid leaching. Alkaline leaching of antimony is mainly sodium sulfide leaching - sodium...

Claims

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Application Information

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Patent Type & Authority Patents(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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