摘要
南京栖霞山铅锌矿由于选锌工艺不能适应矿石性质的变化,导致锌精矿回收率较低,硫精矿含锌超标。为解决该问题,工艺考察查清锌主要流失在-0.008 mm粒级,并有针对性地进行了工艺优化,即现场强化了锌快浮粗选作业,由2台浮选机增至3台浮选机,让粒度粗、易上浮的锌矿物尽可能多地浮出;将原4次扫选作业改成1粗2精3扫槽选流程,扫选1、扫选2的泡沫返回浮选柱粗选,扫选3的泡沫返回扫选2选别,强化对扫选泡沫的回收;取消ϕ1.8 m×8 m型浮选柱,ϕ3 m×10 m型浮选柱的泡沫改由新增浮选槽精选,从而解决现场“跑槽”、“冒槽”问题。在原矿锌品位小幅下降的情况下,锌尾矿锌品位明显下降,锌回收率显著提高,达到90.00%,大幅度减少了锌流失,为实现硫精矿降锌创造了条件。
In Qixiashan Lead-zinc Mine in Nanjing,zinc recovery rate of zinc concentrate is low and zinc content of sulfur concentrate exceeds the standard because of the unsuitable zinc separation process due to the change of ore properties.In order to solve the problem,the process investigation found that zinc was mainly lost in-0.008 mm particles,and the process optimization was carried out specifically.The zinc rapid flotation roughing operation on site is strengthened by increasing amounts of flotation machines from two to three,so that the zinc minerals which is coarse and easy to float floated as much as possible.The original four scavenging process were changed into one roughing,two cleaning and three scavenging flotation flow.The flotation froth from scavenging 1 and 2 returned to flotation column for roughing,and the flotation froth from scavenging 3 returned to scavenging 2 to strengthen the recovery of scavenging bubble.The flotation column ofϕ1.8 m×8 m was cancelled,and the foam ofϕ3 m×10 m flotation column was selected by newly added flotation unit,so as to solve the problems of"bubble spillover"and"bubble overflow"on site.While the zinc grade of raw ore decreased slightly,the zinc grade of zinc tailings decreased significantly,and the zinc recovery rate increased significantly,reaching 90.00%,greatly reducing the loss of zinc.created conditions for reducing zinc content of sulfur concentrate.
作者
韩梦婷
陈如凤
毕康颖
HAN Mengting;CHEN Rufeng;BI Kangying(Nanjing Yinmao Lead-zinc Mining Co.,Ltd.)
出处
《现代矿业》
CAS
2022年第2期140-142,共3页
Modern Mining
关键词
铅锌矿
锌流失
硫精矿
锌含量超标
lead-zinc mine
zinc loss
sulphur concentrate
excess zinc content
