钨属于稀有元素，包括钨铁精矿和钨酸钙精矿两种，在地壳中含量仅为0.8%，我国钨储量约占世界总储量的55%，居首位。
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采用硫磷混酸分解试样测定钨精矿中钙的含量。
Determine the content of calcium with the mixed acidic thionation decomposition sample in the tungsten concentrates mineral.
浮选钨精矿经过酸浸除磷、碳酸盐后，获得混合钨精矿品位为70。
The floatation tungsten concentrate is treated by acid pickling to remove phosphonium and carbonate, and its final concentrate is 70.
分析了在黑钨精矿碱压煮条件下，磷砷渣中钨和污染因子砷的行为。
This paper analyzed the behaviour of tungsten and arsenic contamination factor in phosphorous-arsenic slag under the condition of pressure digestion with NaOH for wolframite concentrate.
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