研究了在有或没有SMBS存在时 ,三种螯合剂 (DETA、TATE和柠檬酸 )对脱除磁黄铁矿的去活化作用。实际上 ,对含有单斜磁黄铁矿的矿样进行过这方面的研究工作。本工作是用最近发现的VoiseyBay矿床镍铜硫化矿获得的结果 ,该矿石中的磁黄铁矿是六面体形的晶体。分批浮选试验结果表明 ,单用DETA和TETA对磁黄铁矿的抑制作用比较弱 ,但是 ,它们与二氧化硫或SMBS联合使用可大大增强对磁黄铁矿的抑制作用。均观察到组合抑制剂对产自加拿大和非洲的两种磁黄铁矿的抑制作用。试验结果表明 ,新型具有协同效应的抑制剂在处理镍铜硫化矿石的工业中具有重要意义。这种协同作用至少包括两个方面 :利用SO2 /SMBS多种性质 ,螯合能活化磁黄铁的金属离子 ;控制磁黄铁矿的氧化还原电位和改变磁黄铁矿的表面性质。还发现了在有或没有SMBS存在时 ,柠檬酸对镍铜精矿的分离指标的提高改善不多。在对VoiseyBay矿石处理时 ,黄铜矿与镍黄铁矿的分离效率较高。此时的浮选化学是以联合使用石灰和氰化物为基础的。由此可知 ,用所制定的药剂制度适合分离VoiseyBey矿石中的矿物 The deactivation of pyrrhotite with three chelators (DETA, TATE and citric acid) was investigated in the presence or absence of SMBS. In fact, research work on this area has been carried out on ore samples containing monoclinic pyrrhotite. This work is the result of a recently discovered nickel-copper sulphide deposit from the Voisey Bay deposit in which pyrrhotite is a hexahedral crystal. The results of batch flotation test showed that the inhibition of pyrrhotite with DETA and TETA alone is relatively weak, however, their combination with sulfur dioxide or SMBS can greatly enhance the inhibition of pyrrhotite. Inhibitory effects of the combination inhibitors on two pyrrhotites from Canada and Africa were observed. The experimental results show that the new inhibitor with synergistic effect is of great importance in the industrial handling of nickel-copper sulphide ores. This synergy includes at least two aspects: the use of various properties of SO2 / SMBS, chelating activation of pyrrhotic metal ions; controlling the pyrrhotic redox potential and changing the pyrrhotic surface properties. It was also found that the improvement of the separation index of citric acid in the nickel-copper concentrate improved little with or without the presence of SMBS. In the treatment of VoiseyBay ore, chalcopyrite and pentlandite separation efficiency higher. The flotation chemistry at this time is based on a combination of lime and cyanide. This shows that the pharmaceutical system developed is suitable for the separation of minerals from Voisey Be Mine