论文部分内容阅读
文章介绍了用浮选方法从磷钇矿中分离独居石、从钨铁矿中分离钶铁矿的可能性。这两类矿一般来说用物理分选方法难以分离。对于马来西亚的独居石和磷钇矿试样，在pH为7．5，以十二烷基胺氧化物（DAC）（浓度为1．0×10-4mol／L）作捕收剂时，浮选回收率有较大差别。两种矿物混合浮选的结果是，对没有扫选作业的精选泡沫，独居石的品位和回收率分别为85％、67％，再精选泡沫，独居石的品位和回收分别为91％、51％。对于各产地的独居石试样，用DAC作捕收剂，通过矿物表面和捕收剂离子之间的静电相互作用，研究了它们的可净性，但结晶度低和表面粗糙及复杂的试样，其可浮性出现异常下降。另外，发现用十二烷基磺酸钠作捕收剂时，在浮选体系中从矿物中解离的铁离子对浮选有活化作用。对于钶铁矿和钨铁矿，当油酸钠浓度为1．0×10-8mol／L，pH＝3时，依据每种矿物单矿物浮选结果，这两种矿物有可能分离。然而，在混合浮选中，钶铁矿在泡沫中的回收率大大低于期望值。这是因为从钨铁矿中解离的钨酸离子在钶铁矿表面发生特性吸附，使表面电荷变得更负，阻止了油酸钠在钶铁矿表面的吸附。
This article describes the possibility of using flotation to separate monazite from xenotime ore and to separate 钶ite from tungsten ore. These two types of mines are generally difficult to separate by physical separation methods. For the monazite and xenotime samples in Malaysia, flotation was performed at a pH of 7.5 with a dodecylamine oxide (DAC) (1.0 × 10 -4 mol / L) as collector The recovery rate is quite different. As a result of the mixed flotation of the two minerals, the quality and recovery of monazite was 85% and 67%, respectively, for the selected foam without the scavenging operation, followed by the selection of foam. The monazite grade and recovery were 91% , 51%. For monazite samples of various origins, DACs were used as collectors to study their cleanability through electrostatic interactions between mineral surfaces and collector ions, but low crystallinity and coarse-grained and complex tests Like, its buoyancy abnormal decline. In addition, when sodium dodecyl sulfonate was found to be a collector, iron ions dissociated from the minerals in the flotation system were found to have an activation effect on flotation. For bauxite and ferrotite, it is possible to separate the two minerals based on the flotation results for each mineral single mineral at a sodium oleate concentration of 1.0 × 10-8 mol / L at pH = 3. However, in mixed flotation, the recovery rate of ferrite in foam is much lower than expected. This is because tungstate ions dissociated from the tungstite undergo a characteristic adsorption on the surface of the briquette, causing the surface charge to become more negative, preventing adsorption of sodium oleate on the surface of the briquetite.