哈密铜镍矿选矿工艺优化与生产实践

Productive practice and technology optimization of mineral processing for copper-nickel ore in Hami

针对哈密某铜镍矿选矿生产实践中浮选泡沫较粘、跑槽现象严重、药剂成本高等问题,对比研究了入选矿石的物化性质,通过适当粗磨、取消预选滑石、调整流程结构等优化工艺的措施;同时筛选药剂种类、调整药剂的配伍、细化药剂的使用,以强化对镍连生体的回收,经技术改造后取得了显著成效。研究表明:试样属轻微氧化的高氧化镁、中低品位铜镍硫化矿石,综合硬度系数为6.7,相对可磨度为1.26;矿石为星散浸染状构造,结构较为松疏,易生成细泥恶化分选环境,适宜的磨矿细度为78%左右。实践表明采用模数为3.1的水玻璃替代六偏磷酸钠与常规水玻璃(模数2.7)强化矿泥分散效果,以高醚化度的MIBC增强对滑石和高氧化镁矿物的抑制,取消BK-204优化了药剂用量、添加少量Y89-2加强捕收剂的协同作用是成功的。技术改造后生产过程稳定、经济技术指标优良,新增经济效益2172万多元。

Some problems ,such as high flotation froth viscosity ,foam overflow seriously ,higher cost of flotation reagents ,etc .had usually appeared on flotation practice of copper-nickel ore in Hami ,Xinjiang . remarkable results have been achieved by optimization of process like maintaining coaser particles size , cancelled talc flotation in advance and adjusting flotation flowsheets ,after comparatively studied physical and chemical charactietics on copper-nickle ore samples .In the meantime ,measures were taked to select flotation reageats ,refine of combined use and compatibility in order to recover nickle-containing intergrow th straightly .Results show that a middle to low-grade copper-nickel ore contenting high magnesium oxide is mildly oxidized ,according to the comprehensive hardness coefficient of 6 .7 and the grindability of 1 .26 . Meanwhile ,the sample is comprised of diffuse disseminated and loose structure .As fine mud is easy to come into being while being process and deteriorate separation environments ,grinding fineness about 78 percent should be appropriate .It was successfully that high modulus of sodium silicate （modulus 3 .1） instead of sodium hexametaphosphate and sodium silicate （modulus 2 .7） strengthened dispersion of slurry ,degree of etherification of methyl-isobutyl-carbinol （M IBC ） enhanced depression of talc and high magnesium oxide minerals as well as synergistic effect was reinforced in addition to a part of new collector Y 89-2 and cancalled foaming agent BK-204 .Production stability ,economic and technical indicators ia good and economic benefitsof over twenty one million seven hundred twenty thousand yuan are gained after productive renovation .