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目前已知钨的自然化合物约有15种,其中仅黑钨矿和白钨矿具有工业价值。在工业矿石中,常有微量或少量次生钨矿物,如钨华等。个别情况下亦偶见微量钨钼钙矿、钨钼铅矿、钨铜矿及钨铅矿等。从我们分析的物料地质资料可知,钨矿石原矿仅含有白钨、黑钨及微量钨华。钨华的测定国内主要是用浓氨水浸取钨华进行测定。国外还有酒石酸钾钠溶液浸取法。我们通过试验,认为还是用浓氨水浸取为好。因为用酒石酸钾钠溶液浸取时,对黑、白钨的浸取能力比浓氨水强,对白钨更甚。我们用浓氨水浸取法测出该矿区钨矿石原矿含钨华(以WO_3计)仅十万分之二。
There are currently about 15 natural compounds of tungsten, of which only tungsten and scheelite have industrial value. In industrial ores, there are often trace or small amounts of secondary tungsten minerals, such as tungsten. Occasionally occasionally trace trace tungsten molybdenite, tungsten molybdenum lead ore, tungsten copper and tungsten lead ore. From the geological data of the material we have analyzed, the tungsten ore ore contains only white tungsten, black tungsten and trace tungsten. The determination of tungsten in China is mainly concentrated with ammonia leaching Tung Wah measured. There are potassium tartrate leaching solution abroad. We passed the test, that is still concentrated ammonia leaching as well. Because leaching with sodium potassium tartrate solution, the leaching capacity of black and white tungsten is stronger than that of concentrated ammonia and even more for white tungsten. We use concentrated ammonia leaching method to measure the mine tungsten ore containing tungsten ore (to WO_3 dollars) only two hundred thousandths.