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    • 3. 发明专利
    • Method of producing ammonium tungstate
    • 生产黄铁矿的方法
    • JP2005126321A
    • 2005-05-19
    • JP2004284072
    • 2004-09-29
    • Jfe Mineral Co LtdJfeミネラル株式会社
    • SUGIBE HIDETAKAATSUMI MICHIOECHIZENYA YUUKO
    • C01G41/00
    • PROBLEM TO BE SOLVED: To provide a method of efficiently producing ammonium tungstate from scheelite-containing ore without attaching special equipment to the conventional equipment.
      SOLUTION: In the method, scheelite-containing ore is mixed with ammonium sulfate, the mixture is subjected to co-pulverization till the grain size of the scheelite-containing ore reaches ≤10 μm by a median value, thereafter, calcium tungstate in the scheelite-containing ore and the ammonium sulfate after the co-pulverization are brought into solid phase reaction at ≥100°C, and the obtained ammonium tungstate is extracted and recovered with a water-base solvent.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种从含有钙黑矿的矿石中有效生产钨酸铵的方法,而不需要将常规设备附加特殊设备。 解决方案:在该方法中,将含白钨矿的矿石与硫酸铵混合,将混合物进行共粉碎,直至含白垩石矿石的晶粒尺寸达到≤10μm为中间值,其后为钨酸钙 在含有白云石的矿石和硫酸铵中,共粉碎后,在≥100℃下进行固相反应,得到的钨酸铵用水溶剂萃取回收。 版权所有(C)2005,JPO&NCIPI