Technology for Producing Tungsten Trioxide by Prilling and Roasting of Tungsten Slag

The present invention discloses a method for the production of tungsten slag Ball tungsten trioxide roasting process.

Characterized by: includes the following steps:

(1) The tungsten residue after drying join anthracite, mix crushed, then add the lime mud, soda and water , hexadecimal Handicap Ball, made of tungsten mixed slag pellets.

(2) Mixing the ball into the open hearth furnace slag tungsten roasting kiln firing semi-enclosed insulation, too tungsten slag clinker.

(3) Tungsten slag clinker immersion, have a high concentration of ion exchange of sodium tungstate liquor.

(4) Addition of high concentrations of sodium tungstate liquor quality after filtration, reprecipitation, and then the precipitate was rinsed, dehydrated and dried to obtain the product of calcium tungstate.

The invention uses a tungsten residue, anthracite, lime mud and recycling waste as an alternative to traditional baking agent, a wet pyrometallurgical process used is expensive, large consumption of soda ash and burning acid, metal tungsten production cost per ton reduced 6-7 million to make the conversion rate WO3 twenty five percentage points, and successfully resolved the sodium roasting kilns, kiln shutdown ills caked shovel, still in the traditional process, saving on production of wet fire energy consumption by 50 percent.




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