Method for vacuum smelting lithium

Method for vacuum smelting lithium

  • CN 1,065,283 C
  • Filed: 02/24/1997
  • Issued: 05/02/2001
  • Est. Priority Date: 02/24/1997
  • Status: Active Grant
First Claim
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1. the method for vacuum smelting of a lithium, its technical process is that lithium salts adds Calx preconditioning, and controlled temperature makes carbonate decomposition, obtains composite oxides, adds aluminium, silicon ingredient, and moulding enters metallurgical furnace and smelts, and obtains lithium and slag, it is characterized in that:

  • 1) pre-treatment, smelting, refining are all carried out in vacuum oven, and moulding is also carried out under vacuum condition;

    2) pre-treatment control furnace temperature is 700~

    1000 ℃

    ;

    3) vacuum forming at normal temperatures;

    4) molding mass enters vacuum oven and slightly refines 1200~

    1400 ℃

    of controlled temperature, vacuum tightness 10 -1

    10 2Pa obtains thick lithium and slag. 5) thick lithium reenters the vacuum oven refining, and controlled temperature is not higher than 1000 ℃

    , vacuum tightness 10 -4

    10 2Pa obtains the finished product lithium.

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