澳大利亚某富含自然铜硫化铜矿石选矿工艺

澳大利亚某拟开发的富含自然铜硫化铜矿石中主要有用矿物为自然铜、辉铜矿、黄铜矿、黄铁矿、硫铜钴矿、磁铁矿。根据矿石特点和澳大利亚方面的选矿试验结果，为避免选矿生产过程中具良好延展性的自然铜黏附在圆锥破碎机和磨机的衬板上造成破碎机的损坏和磨机的堵塞，中国瑞林工程技术有限公司为该矿石设计了有针对性的选矿工艺：在破碎过程中以对辊破碎机为第2、第3段破碎设备，使粒度大于40 mm的自然铜形成大的片状物，然后通过筛分将其与其他小块矿石分离；对于破碎后矿石中粒度小于40 mm的自然铜，采用高压辊磨机粉碎-圆筒洗矿机+圆筒筛和振动筛打散分级-跳汰+螺选溜槽+摇床重选工艺进行回收；最后通过磨矿-浮选-弱磁选，从重选尾矿中获得铜品位为32%，铜回收率为95%的铜精矿，钴含量为1%、钴回收率为65%的硫钴精矿和铁品位为68%、铁回收率为42%的铁精矿。该设计为高效合理地开发利用富含自然铜的硫化铜矿石提供了新的思路。

Beneficiation of a Sulphide Ore with High Grade of Native Copper in Australia

The main valuable minerals of a copper sulphide ore with high grade of native copper are native copper，chalcocite，chalcopyrite，pyrite，copper and cobalt sulfide and magnetite.According to the ore properties and the beneficiation tests from Australia，and in order to avoid the native copper with a good ductility from adhesion on the liners of the cone crusher and mill in dressing process to result in damage of the crusher and mill blockage，China Nerin Engineering Co.，Ltd.designs the targeted beneficiation process for the ore:In the crushing process，the roll crusher is used as the second and third crushing equipment，to make the native copper with size of greater than 40 mm be large flakes，and then separated from small one by sieving.The native copper ore in particle size of less than 40 mm after crushing are recovered by the process of the HPGR for comminution-drum washer+cylinder screen+vibrating screen for classification-jigging+spiral+table gravity separation.Then，through the process of grinding-flotation-low intensity magnetic separation，copper concentrate with Cu grade of 32% and Cu recovery of 95%,sulfur-cobalt concentrate with cobalt content of 1% and cobalt recovery of 65%，and iron concentrate with Fe grade of 68% and Fe recovery of 42% are achieved separately from the gravity tailings.This process design provides a new idea for efficient and rational development and utilization of the copper sulfide ore with high grade of native copper.