公开(公告)号：US3969484A

公开(公告)日：1976-07-13

申请号：US551240

申请日：1975-02-20

申请人： Satoshi Onozaki ,  Shogo Nemoto ,  Takeshi Hazeyama

发明人： Satoshi Onozaki ,  Shogo Nemoto ,  Takeshi Hazeyama

IPC分类号： C01G41/00 ,  C22B34/36 ,  C01G39/00

CPC分类号： C22B34/36 ,  C01G41/00

摘要： This invention relates to a process for recovering tungsten from an alkaline leaching solution of tungsten ores. This invention comprises adjusting the pH of an alkaline leaching solution which is obtained by lixiviating ore containing tungsten with an alkaline solution to 7-8 with acid to oxidize molybdic acid ions in the solution, adding a sulfide donor, then precipitating molybdenum sulfide compounds by adjusting the pH value of the solution to 2-3, and recovering tungstic acid ions as calcium tungstate by the addition of a calcium ion donor after the molybdenum sulfide compounds are separated.

摘要翻译： 本发明涉及从钨矿的碱性浸出溶液中回收钨的方法。 本发明包括调整碱性浸出溶液的pH值，该碱性浸出溶液通过用酸溶液将含钨的矿物酸浸至7-8而获得，以氧化溶液中的钼酸离子，加入硫化物供体，然后通过调节沉淀硫化钼化合物 溶液的pH值为2-3，并且在分离出硫化钼化合物之后通过加入钙离子供体来回收钨酸钙作为钨酸钙。