Method for preparing antimony sesquioxide by stibnite concentrate

A technology of antimony trioxide and antimony sulfide, which is applied in chemical instruments and methods, inorganic chemistry, antimony compounds, etc., can solve the problems of high whiteness and low whiteness, and achieve the effect of shortening the process flow, avoiding dissolution and stable product quality.

Active Publication Date: 2013-10-16
HUNAN CHENZHOU MINING CO LTD
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  • Abstract
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Problems solved by technology

However, in the actual application process, the applicant's technicians found that the products obtained by the above method still have the problem of high and low whiteness

Method used

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  • Method for preparing antimony sesquioxide by stibnite concentrate
  • Method for preparing antimony sesquioxide by stibnite concentrate
  • Method for preparing antimony sesquioxide by stibnite concentrate

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the examples, but the present invention is not limited to the following examples.

[0035] The flow process that produces in the laboratory of the present invention is as follows:

[0036] Table 1 Contents of main components of a certain mineral source

[0037] Sb%

Pb%

As%

Bi%

Cu%

Aug / t

SiO 2 %

h 2 O%

44.12

0.68

1.00

0.0635

0.570

5.13

17.94

15.68

[0038]Add antimony sulfide concentrate to the chlorinated leaching solution of the above-mentioned 80 mesh antimony sulfide concentrate for primary reduction; 10 to 15 times the mass; (sodium thiosulfate is industrial grade, with a main content of 99.96%) to react for 4 to 5 hours. Filter, and the filtrate precipitates for no less than 24 hours. When the arsenic content in the filtrate is within 30ppm, filter, add 0.4-0.8 times the amount of sodium thiosulfate copper s...

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Abstract

The invention discloses a method for preparing antimony sesquioxide by stibnite concentrate. The method comprises the steps as follows: adding a solution subjected to a chlorination leaching reaction and a primary reduction reaction with sodium thiosulfate for removing arsenic, depositing for at least 24 hours to enable the arsenic content in a liquid phase to be lower than 30 ppm, filtering, adding filter liquor with copper sulfate pentahydrate for removing excess sodium thiosulfate, and hydrolyzing, neutralizing and drying filter liquor after reactions to prepare the high-purity antimony sesquioxide with the iron, lead and arsenic content of less than 10 ppm, the copper content of 1 ppm and the whiteness of more than 93%. According to the method for preparing antimony sesquioxide by stibnite concentrate, the whiteness stability of antimony sesquioxide can be improved and the production process can be simplified.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a method for preparing antimony trioxide from antimony sulfide concentrate. Background technique [0002] At present, the production process of antimony trioxide in China is mainly divided into fire method and wet method. Among them, the wet method has attracted more and more attention because of its great advantages over the fire method in terms of environmental protection and product chemical indicators. Patent CN201110041717 proposes a method of producing high-purity wet antimony trioxide with arsenic and lead content within 10 ppm from antimony sulfide concentrate by chlorination-hydrolysis method, and has successfully applied it in industry. However, in the actual application process, the applicant's technicians found that the whiteness of the product obtained by the above method still has the problem of sometimes high and sometimes low. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00
Inventor 周威许霞周群力
Owner HUNAN CHENZHOU MINING CO LTD
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