Reduction smelting slag and application thereof in crude antimony oxide reduction smelting

Reduction smelting slag and application thereof in crude antimony oxide reduction smelting

  • CN 105,714,130 B
  • Filed: 04/27/2016
  • Issued: 12/25/2020
  • Est. Priority Date: 04/27/2016
  • Status: Active Grant
First Claim
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1. The application of the reduction smelting slag is characterized by comprising the following steps:

  • step oneThe crude antimony oxide to be smelted is detected and analyzed to determine SiO in the crude antimony oxide2Contents of Fe, CaO, Na;

    detecting and analyzing the carbonaceous reducing agent to determine the content of C in the carbonaceous reducing agent;

    step twoWeighing a certain amount of crude antimony oxide, calculating the supplement amount of the element C according to 6-15% of the mass of the crude antimony oxide, and converting the supplement amount of the element C into the supplement amount of the carbonaceous reducing agent;

    step threeSetting the component content of the reduction smelting slag;

    the reduction smelting slag comprises the following components in parts by mass;

    SiO230-34 parts;

    34-38 parts of FeO;

    8-15 parts of CaO;

    Na216-28 parts of O;

    the melting point of the reduction smelting slag is 900-1000 ℃

    ;

    setting the relationship between the reduction smelting slag and the prepared crude antimony oxide as follows;

    the mass ratio of the reduction smelting slag to the prepared crude antimony oxide is as follows;

    the prepared crude antimony oxide =1;

    2-10;

    according to the component content of the set reduction smelting slag and the SiO in the crude antimony oxide measured in the step one2The contents of Fe, CaO and Na and the relationship between the set reduction smelting slag and the prepared crude antimony oxide are calculated to obtain the SiO to be supplemented2Fe, CaO, Na;

    then preparing SiO according to the calculation result2A source, a source of Fe, a source of CaO, a source of Na;

    step fourPutting the prepared materials into a smelting furnace, heating to 900-1200 ℃

    , and preserving heat;

    obtaining crude antimony and furnace slag;

    when the reduction smelting slag is applied to reduction smelting of crude antimony oxide, the direct recovery rate of metal antimony is more than or equal to 90%, and the mass percentage content of antimony in the slag is less than or equal to 0.97%.

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