Technique for producing high-purity antimonous oxide by processing stibnite concentrate through wet method

A technology of antimony trioxide and wet treatment, which is applied in the direction of inorganic chemistry, antimony compounds, chemical instruments and methods, etc. It can solve the problems of large antimony loss, high production cost, and large dosage, and achieve good arsenic removal effect , Uniform particle size and high purity

Inactive Publication Date: 2015-09-30
HUNAN CHENZHOU MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the disadvantages of large antimony loss, large dosage and high production cost in the process of producing antimony trioxide using the chlorinated leaching solution of antimony sulfide concentrate as raw material in the prior art, the purpose of the present invention is to provide an antimony loss less, low cost, and can stably produce high-purity antimony trioxide process

Method used

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  • Technique for producing high-purity antimonous oxide by processing stibnite concentrate through wet method
  • Technique for producing high-purity antimonous oxide by processing stibnite concentrate through wet method
  • Technique for producing high-purity antimonous oxide by processing stibnite concentrate through wet method

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Embodiment 1

[0043] The antimony sulfide concentrate (with a particle size of -80 mesh) having the composition in Table 1 is chlorinated and leached, and antimony fine powder is added to the chlorinated leaching solution, stirred, and reduced. The amount of antimony fine powder is Sb in the antimony liquid 5+ 5 times the mass content, the particle size of antimony fine powder is less than 80 mesh, the reaction time is 3 hours, and the solution is filtered after the reaction is in place; the filtered antimony solution is added with sodium hypophosphite to remove impurities, and the added quality of sodium hypophosphite is 2 to 4 times the mass content (sodium hypophosphite is industrial grade, the main content is 99.95%), the acidity of the antimony solution is controlled at about 5mol / L, the reaction temperature is controlled at about 100°C, the stirring time is 4 hours, and the filtrate precipitates after filtration for 7 About hours; the precipitated antimony solution is filtered again, a...

Embodiment 2

[0049] The antimony sulfide concentrate (with a particle size of -80 mesh) having the composition in Table 1 is chlorinated and leached, and antimony fine powder is added to the chlorinated leaching solution, stirred, and reduced. The amount of antimony fine powder is Sb in the antimony liquid 5+ 6 times the mass content, the particle size of antimony fine powder is less than 80 mesh, and the reaction time is 4 hours. After the reaction is in place, filter the solution; add sodium hypophosphite to the filtered antimony solution to remove impurities. 2 to 4 times the mass content (sodium hypophosphite is industrial grade, the main content is 99.95%), the acidity of the antimony solution is controlled at about 4.5mol / L, the reaction temperature is controlled at about 95°C, the stirring time is 3 hours, and the filtrate precipitates after filtration Not less than 6 hours; filter the precipitated antimony solution again, carry out hydrolysis reaction at room temperature, and the vo...

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Abstract

The invention discloses a technique for producing high-purity antimonous oxide by processing stibnite concentrate through the wet method. According to the technique, the stibnite concentrate is chloridized, a leaching agent is reduced by means of fine stibium powder, reduction liquid is selectively reduced through sodium hypophosphite under the proper temperature and proper acid concentration conditions so that arsenic is removed, iron in a solution subjected to arsenic removal is removed through hydrolysis, and lead in the solution subjected to arsenic removal is removed through ethylene diamine tetraacetic acid; meanwhile, growth of crystals is controlled by adding dihydroxysuccinic acid and controlling the neutral reaction condition, and in this way, a high-purity antimonous oxide product containing main impurities such as lead, arsenic and iron all being within 10 ppm and the average particle sizes being 2-3 microns can be produced. According to the technique, the stibium loss is small, operation is easy, production cost is low, and industrial production requirements are met.

Description

technical field [0001] The invention relates to a process for producing high-purity antimony trioxide by treating antimony sulfide concentrate with a chlorination-hydrolysis method, and belongs to the field of hydrometallurgy. Background technique [0002] The metal antimony is rarely used alone, and various compounds of antimony and alloys of antimony and lead, tin, copper and other metals have a wide range of uses. The flame retardant industry is the largest antimony-consuming field in the world today, and the antimony consumption accounts for about 70%-75% of the world's total antimony consumption. Antimony oxide is an excellent flame retardant synergist, which can produce a good flame retardant and self-extinguishing effect when it works together with halides. Antimony-based flame retardants are widely used in plastics, electrical components and chemical fiber textiles. [0003] With the wide use of polymer synthetic materials and the increasing demand for fire protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G30/00
Inventor 刘宗强王国辉杨雅历
Owner HUNAN CHENZHOU MINING CO LTD
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