保温缓冷条件对金川集团镍冶炼厂高镍锍结晶性能的影响  

Effect of Heat Preservation and Slow Cooling Conditions on Crystallization Properties of High Nickel Matte in Jinchuan Group Nickel Smelter

作　　者：程刘刚 朱登基 刘文刚 刘振纲[1] 潘树军 毛勇 张锐锐 CHENG Liugang;ZHU Dengji;LIU Wengang;LIU Zhengang;PAN Shujun;MAO Yong;ZHANG Ruirui(Nickel Smelter,Jinchuan Group;School of Resources and Civil Engineering,Northeastern University)

机构地区：[1]金川集团镍冶炼厂 [2]东北大学资源与土木工程学院

出　　处：《现代矿业》2024年第1期134-139,共6页Modern Mining

摘　　要：高镍锍在分选过程中存在铜镍矿物结晶粒度小,金属互含高等难题。金川集团镍冶炼厂为了改善铜、镍分选效果,提高产品质量,开展了高镍锍保温缓冷试验,并通过TG-DSC测试、粒径统计、MLA以及SEM检测,分析了缓冷条件对高镍锍结晶性能的影响。研究结果表明,辉铜矿的生长情况影响高镍锍中辉铜矿和锍镍矿互含情况,在最佳缓冷条下可得到晶粒粒度+74μm占比98%以上的辉铜矿晶体;SEM检测表明,最佳缓冷样品中辉铜矿区域Ni含量0.3%,硫镍矿Cu含量2.6%;MLA检测表明,最佳缓冷条件下,样品中辉铜矿和锍镍矿的单体解离度分别为93.97%和86.58%,与现场样品相比,控温缓冷后样品的性能得到了显著改善。In the separation process of high nickel matte,there are some problems,such as small crys⁃tal size of copper and nickel minerals and high mutual content of metals.In order to improve the separation effect of copper and nickel and improve the product quality,the nickel smelter of Jinchuan Group carried out the test of high nickel matte heat preservation and slow cooling.The effects of slow cooling conditions on the crystallization properties of high nickel matte were analyzed by TG-DSC test,particle size statistics,MLA and SEM test.The results show that the growth of chalcocite affects the mutual inclusion of chalcocite and nickel matte in high nickel matte.Under the optimum slow cooling conditions,chalcocite crystals with grain size of+74μm accounting for more than 98%can be obtained.The SEM test shows that the Ni content of the chalcocite area in the best slow cooling sample is 0.3%,and the Cu content of the nickel sulfide ore is 2.6%.MLA test shows that under the optimal slow cooling conditions,the monomer dissociation degree of chalcoc⁃ite and matte nickel in the sample is 93.97%and 86.58%,respectively.Compared with the on-site samples,the performance of the samples after controlled temperature slow cooling is significantly improved.

关 键 词：高镍锍 保温缓冷 结晶粒度 金属互含 

分 类 号：TF815[冶金工程—有色金属冶金]