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钨矿物的NaOH分解法由于设备简单、排放的三废量少、成本低而广泛用于黑钨精矿的分解过程。对于黑白钨混合矿,由于人们未能找到矿中CaWO_4与NaOH反应的恰当条件,长期以来不得不在高碱用量的条件下进行浸出,然后进行钨碱分离,因而流程冗长,能耗高;对于低品位的白钨细泥或低质量的白钨精矿,更是无法采用NaOH分解,不得不在200℃以上的高温和15大气压以上的压力下进行苏打分解或酸浸后再用NaOH分解。这些,在经济上都是不合算的。因此,
The NaOH decomposition method of tungsten minerals is widely used in the decomposition of wolframite concentrate because of its simple equipment, less emission of three wastes and low cost. Because of the failure to find the appropriate conditions for the reaction between CaWO_4 and NaOH in the miner’s tungsten and tungsten mixed ore, it has long been necessary to leach it under the condition of high alkali dosage and then separate the tungsten and alkali so that the process is lengthy and consumes high energy. Grade white tungsten fine mud or low-quality scheelite, it is impossible to use NaOH decomposition, had to over 200 ℃ high temperature and 15 atmospheric pressure above the pressure of soda decomposition or acid leaching and then NaOH decomposition. These are economically uneconomical. therefore,