【摘要】 针对国外某白钨矿矿石中含有大量磁铁矿及少量硫化矿的矿石性质,采用"磁选除铁-白钨粗选-白钨加温精选"的选别流程回收白钨矿.试验无预脱硫作业,白钨粗选段采用Na2CO3+改性Na2Si O3为调整剂以及GYWA为捕收剂,加温精选作业采用改进的"彼得洛夫法",以Na2Si O3和NS为抑制剂,强化对脉石的抑制及对白钨矿的捕收,实现了白钨矿的充分回收.在原矿WO3品位为0.47%的条件下,获得WO3品位66.69%、回收率88.86%的白钨精矿.钨精矿中S品位为0.025%,符合钨精矿的质量标准.更多还原

【Abstract】 A scheelite ore from abroad contains a large number of magnetite and small amounts of sulphide ore.In order to recycle the valuable minerals, a flowsheet of "maganetic separation-WO3roughing- heated flotation for WO3 rough concentrate" is identified. Without desulphurization operation, Na2CO3+ modified Na2 Si O3are used as combined regulator and GYWA as collector in scheelite roughing stage and the "Improved Petrov Method" is employed in scheelite cleaning stage, by which the scheelite is recovered completely. Meanwhile, Na2 Si O3+NS are added as regulator in cleaning stage to intensify depression of gangue and recovery of scheelite. As a result, with the 0.47% of WO3 for feeding, the scheelite concentrate assays 66.69% WO3 with recovery of 88.86%. And the sulfur contaminants in scheelite concentrate is 0.025% which meets the quality specification.更多还原