摘要
在对某高硫铜选厂浮选工艺流程考察的基础上,加入中矿再磨作业,在铜精矿品位不低于现场指标的前提下,采用中矿再磨工艺进行选矿试验,铜精矿回收率从87.22%提高至89.82%。运用筛析化验分析方法对中矿磨前、磨后和尾矿等颗粒进行分析发现,中矿磨后能有效的降低粗颗粒粒级的数量,解离出粗颗粒中的有用矿物,增加中间粒级的产率和金属量,中矿再磨工艺有效的降低尾矿品位。中矿磨后返回到粗选二段构成了浮选和磨矿之间的循环,使中矿不断选择性磨矿、分级、浮选,直至达到适当的单体解离度为止,有利于整个工艺铜回收率的提高。
Based on the investigation into the flotation process in a high sulphur copper ore concentration plant,the regrinding of middlings was added into the process flow.On the premise of that the concentrate grade was not less than the field indexes,regrinding of middlings was used in a concentration experiment, the concentrate recovery increased from 87.22%to 89.82%.Particles of middlings before and after grinding as well as tailings were analyzed with sieving assay method,it was found that quantity of big-sized particles in reground middlings reduced,and useful element was liberated,yield and metal output of intermediatesized particles increased,and tailings grade decreased.When reground middlings returned to the secondary flotation,circulation between flotation and grinding operation formed,thus the middlings were selectively ground,classified and floated then reached the proper free liberation degree,which were advantageous to improving copper recovery.
出处
《矿山机械》
北大核心
2010年第19期118-122,共5页
Mining & Processing Equipment
关键词
中矿再磨
高硫铜矿石
选铜回收率
工艺机理
regrinding of middlings
copper ore with high sulphur
copper recovery
mechanism of process
