Flotation of mixed copper oxide and sulphide minerals with xanthate and hydroxamate collectors
Flotation of mixed copper oxide and sulphide minerals with xanthate and hydroxamate collectors
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DOI：
10.1016/j.mineng.2008.11.005
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发表时间：
2009-03-01
影响因子：
4.8
通讯作者：
Reuter, M. A.
中科院分区：
文献类型：
--
作者：
Lee, K.;Archibald, D.;Reuter, M. A.
舍伍德铜业的Minto矿在加拿大育空地区加工高品位铜金矿。所开采的矿石来自一个原生硫化铜矿床，另有多个铜氧化物矿床。与奥斯梅尔特化学公司合作，Minto目前正在研究利用浮选回收氧化铜矿和硫化矿物的方案，方法是将原生硫化物矿石与氧化物矿石混合。在这个实验室规模的调查中使用的混合物是70%的硫化矿和30%的氧化矿。混合矿物中的铜硫化物为斑铜矿和黄铜矿，氧化物为孔雀石和少量天青石。从以往使用黄药和异羟甲酸盐捕收剂浮选混合氧化铜和硫化物矿物的研究中，很难区分烷基异羟甲酸酯捕收剂对硫化物回收率的影响，因为硫化物和氧化物矿物是自然共生的。在Minto作业的情况下，氧化铜和硫化物矿物分别出现在不同的矿藏中，可以单独处理或混合在一起。研究表明，将异丙醇酸正辛酯(AusMeltLimited生产的AM28)与传统的硫化物捕收剂配合使用，可成功地从混合矿石矿物中同时浮选回收硫化铜和氧化铜。与单独处理硫化矿石相比，处理混合矿石时的硫化铜回收率没有下降。70%硫化矿与30%氧化矿混合时，粗选铜回收率高达95.5%。混合捕收剂从混合矿石中回收铜的效果优于控制潜在硫化后仅使用黄药的回收效果。(C)2008爱思唯尔有限公司。保留所有权利。
Sherwood Copper's Minto Mine processes a high grade copper-gold deposit in Yukon, Canada. The ore mined is from a primary copper sulphide deposit with separate additional deposits of copper oxides. In conjunction with Ausmelt Chemicals, Minto is currently investigating options to recover copper oxide and sulphide minerals using flotation by blending their primary sulphide ore with oxide ores. The blend used in this laboratory scale investigation was 70% sulphide ore and 30% oxide ore on a weight basis. The copper sulphides present in the blend were bornite and chalcopyrite, while the oxides were malachite and minor azurite.From previous flotation investigations of mixed copper oxide and sulphide minerals using xanthate and hydroxamate collectors it was hard to distinguish the impact of the alkyl hydroxamate collector on sulphide recovery as the sulphide and oxide minerals occurred naturally together. In the case of the Minto operation the copper oxide and sulphide minerals occur in separate ore deposits and can be treated separately or blended together. This investigation has shown that using n-octyl hydroxamates (AM28 made by Ausmelt Limited) in conjunction with traditional sulphide collectors can successfully simultaneously recover copper sulphides and oxides by flotation from blended ore minerals. The copper sulphide recovery did not decrease when processing the blended ore compared to treating the sulphide ore independently. At a blend of 70% sulphide ore and 30% oxide ore, the rougher scavenger copper recovery was as high as 95.5%. The copper recovery from the blended ore using a mixture of collectors was shown to be superior to the recovery obtained using only xanthate after controlled potential sulphidisation. (C) 2008 Elsevier Ltd. All rights reserved.