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首页> 外文会议>XXI International Mineral Processing Congress >MINERAL SEPARATION IN THE PROCESSING OF COMPLEX NICKEL-COPPER ORES USING CHELATING AGENTS
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MINERAL SEPARATION IN THE PROCESSING OF COMPLEX NICKEL-COPPER ORES USING CHELATING AGENTS

机译：螯合剂在复杂镍铜矿选矿中的矿物分离

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Deactivation/depression effect on pyrrhotite rejection of three chelating agents, diethylenetriamine (DETA), triethylenetetramine (TETA) and citric acid has been compared with and without using sodium metabisulfite (SMBS). Virtually, all of the previous research work in this area was carried out using ore samples containing predominantly monoclinic type of pyrrhotite. The present work includes results obtained with samples from recently discovered Voisey's Bay nickel-copper sulfide ores, which carry only hexagonal pyrrhotite. Bench scale flotation results indicate that the effect of DETA and TETA on pyrrhotite depression can be marginal whenever they are used alone, but greatly increased whenever they are used in combination with sulfur dioxide (SO_2) or SMBS. The depression effect has consistently been observed on both types of pyrrhotite originating from various locations in Canada and Africa. This is noted as a new type of synergistic effect with industrial importance in processing of Ni-Cu complex sulfide ores. This synergistic effect has at least two major components; chelation of potential activating metal ions for pyrrhotite and redox potential control/surface modification of pyrrhotite consistent with multifunctional nature of SO_2/SMBS. While citric acid has also been found to improve the grade/recovery performance of the nickel-copper concentrate from a primary flotation feed its effect on pyrrhotite depression in a reground scavenger concentrate was insignificant with and without SMBS. A highly efficient separation of chalcopyrite from pentlandite has also been demonstrated using Voisey's Bay ore. The flotation chemistry in this case is based on lime-cyanide combination. It is clear that Voisey's Bay ore can be very amenable to mineral separation by appropriate choice of reagents in flotation processes.
机译：比较了使用和不使用焦亚硫酸钠（SMBS）三种螯合剂（二亚乙基三胺（DETA），三亚乙基四胺（TETA）和柠檬酸）对黄铁矿排斥的失活/抑制作用。实际上，该领域以前的所有研究工作都是使用主要含有单斜晶型黄铁矿的矿石样品进行的。目前的工作包括从最近发现的Voisey's Bay镍铜硫化矿矿石中获得的结果，这些矿石仅携带六方黄铁矿。基准浮选结果表明，无论何时单独使用DETA和TETA，对黄铁矿压降的影响都很小，但与二氧化硫（SO_2）或SMBS组合使用时，DETA和TETA的影响可能很小。在源自加拿大和非洲不同地点的两种类型的黄铁矿中，都一直观察到抑郁效应。这被认为是一种新型的协同效应，在镍铜复合硫化矿的加工中具有工业重要性。这种协同作用至少有两个主要组成部分：与黄铁矿的活化金属离子螯合和黄铁矿的氧化还原电势控制/表面改性，与SO_2 / SMBS的多功能性相符。虽然还发现柠檬酸可改善初级浮选进料中镍铜精矿的品位/回收性能，但无论是否使用SMBS，柠檬酸对再研磨清除剂精矿中黄铁矿压低的影响均微不足道。使用Voisey's Bay矿石也已证明了将黄铜矿与五芒石高效分离。在这种情况下，浮选化学是基于石灰-氰化物的组合。显然，的Voisey湾矿可在由浮选工艺试剂的适当选择，选矿非常适合。

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