Discussion On Smelting Ferrotungsten With Sheelite Concentrate

Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten. Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws. Scheelite has been synthesized via the Czochralski process; the material produced may be used to imitate diamond, as a scintillator, or as a solid state lasing medium. It was also used in radium paint in the same fashion as was zinc sulphide, and Thomas Edison invented a fluoroscope with a calcium tungstate-coated screen, making the images six times brighter that those with barium platinocyanide; the latter chemical allowed Röntgen to discover X-rays in early November 1895.

In smelting ferrotungsten,using sheelite concentrate to substitute partly wolframite concentrate. By reforming process,charging an enormous amount of low phosphorous,low calcium oxide and high iron oxide during refining,picking and diluting stages respectively,then can decrease the ferrotungsten production cost and obtain obvious benefit.

 

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