某高镁铜镍矿石浮选试验  

Flotation Tests of a Nickel-copper Ore with High Magnesium

作　　者：胡志凯[1,2] 谈伟军 曾克文 孙志健[1,2] 万丽 Hu Zhikai1,2, Tan Weijun3, Zeng Kewen1,2, Sun Zhijian1,2, Wan Li1,2(1. Beijing General Research Institute of Mining and Metallurgy, Beijing 102628, China;2. State Key Laboratory of Mineral Processing Science and Technology , Beijing 102628, China ;3. Qinghai Huanghe Mining Co. ,Ltd. ,Xining 817000, Chin)

机构地区：[1]北京矿冶研究总院,北京102628 [2]矿物加工科学与技术国家重点试验室,北京102628 [3]青海黄河矿业有限责任公司,青海西宁817000

出　　处：《金属矿山》2018年第3期81-84,共4页Metal Mine

基　　金：国家重点基础研究发展计划(973计划)项目(编号:2014CB643403)

摘　　要：某高镁铜镍矿石含镍0.76%、铜0.16%、氧化镁25.12%,铜矿物主要为黄铜矿,镍矿物主要为镍黄铁矿,脉石矿物主要有透闪石、滑石、蛇纹石,橄榄石、透辉石及绿泥石等少量,有害杂质组分滑石、蛇纹石及绿泥石等的含量高达42%。矿石中铜、镍的氧化率均较低,原生硫化铜占总铜的87.50%,硫化镍占总镍的98.68%。为获得低镁铜镍混合精矿,进行了选矿试验。结果表明,矿石在磨矿细度为-0.074 mm占70%的情况下,采用2粗2扫2精,精选1尾矿连续2次精扫选,精选2尾矿与精扫选1精矿合并返回,其他中矿顺序返回流程处理,可获得铜品位为2.28%、镍品位为11.81%、铜回收率为70.37%、镍回收率为76.20%、氧化镁含量仅为4.38%的铜镍混合精矿,产品达到一级品质量标准(镍品位大于10%,氧化镁含量小于6%);抑镁效果取得成功的关键在于在精选段添加了北京矿冶研究总院研制的含镁脉石矿物的高效抑制剂——改性CMC(总添加量为480 g/t)。试验流程具有稳定、低药耗、高效等优点,适合该矿石的处理。A high magnesium copper-nickel ore contains nickel 0. 76%, copper 0. 16%, magnesium oxide 25. 12%. Copper minerals are mainly chalcopyrite, nickel minerals are mainly pentlandite, gangue minerals are mainly tremolite, talc, serpentine, olivine, diopside and less chlorite. The contents of harmful impurity components such as talc, serpentine and chlorite are as high as 42%. The oxidation rate of copper and nickel in the ore is low,and the primary copper sulfide occupies 87.50% of the total copper,and the nickel sulfide occupies 98.68% of the total nickel. In order to obtain the low magnesium copper nickel concentrate,the ore dressing tests were carried out. The results show that under the ore grinding fineness of -0. 074 mm accounted for 70%, and by the process of two-roughing,two-scavenging and two-cleaning,following by two scavengings for concentrate 1 and combining tailings from cleaning concentrate 2 with concentrate of scavenging 1, and other middles back to the flowsheet in turn,the copper-nickel concentrate with copper grade of 2. 28% ,nickel grade of 11.81% ,copper recovery rate of 70. 37%, nickel recovery rate of 76. 20%, magnesium oxide of only 4. 38% was obtained ,which reaches first quality standards （nickel grade of more than 10% ,magnesium oxide of less than 6% ） ;The key to successfully inhibit magnesium is adding the modified CMC inhibitors into cleaning stages （with the total addition of 480 g/t）. The total amount was, which was a kind of high effective inhibitor for gangue minerals containing magnesium developed by Beijing General Research Institute of Mining and Metallurgy. The test process has advantages of stable operation, low reagent consumption and high efficiency, and is suitable for treatment of the ore.

关 键 词：铜镍矿 氧化镁 滑石 蛇纹石 

分 类 号：TD923.7[矿业工程—选矿]