Tungsten Ore Rock Crusher-II

Tungsten smelting and fire refining method are two kinds of water law. The use of wolframite concentrate or smelting scheelite concentrate, but different smelting process, so both wolframite deposits, there scheelite, we must each ore body, each calculated reserves. When the ore wolframite, scheelite coexists together, to elect a black tungsten concentrate and scheelite concentrate for smelting, respectively. The smelting of mineral raw materials as tungsten tungsten ore concentrates, containing WO3 should meet or greater than 65%. The pyrometallurgical into tungsten alloy (with W>70 or>65%) by Water Act, a positive tungsten smelting sodium, calcium APT or tungsten, etc. Finally, further processed into tungsten trioxide (containing WO3>=99.9%), then reducing agent (usually hydrogen) is reduced to tungsten powder (with W>=99.9%) and so on.

Tungsten is recovered from scheelite ore concentrates, or other tungsten concentrates which may, or may not contain scheelite in the form of sodium tungstate and in yields up to 99.5 percent or more by a process in which ground ore substantially below 200 mesh in particle size is first added to a 50 percent sodium hydroxide solution while being agitated to such an extent that the resulting mixture becomes a semi-solid as the temperature is raised above 80C. The semi-solid is then baked at 135 to 145C for about 1 to 2 hours, followed by adding sufficient water to the semi-solid to form a slurry having a sodium hydroxide concentration below 6 molar, separating the causticinsoluble sludge from the slurry and washing the sludge with a dilute sodium hydroxide solution to remove residual sodium tungstate.



 

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