辽宁某金矿石精矿品位提高试验研究  

Experimental study on improving the grade of a gold concentrate in Liaoning

作　　者：刘学勇 刘江 秦贵杰 孟宪瑜 刘子源 Liu Xueyong;Liu Jiang;Qin Guijie;Meng Xianyu;Liu Ziyuan(Shenyang Research Institute of Nonferrous Metals Limited Company;Liaoning Guoce Gold Co.,Ltd.;School of Mining Engineering,University of Science and Technology Liaoning)

机构地区：[1]沈阳有色金属研究院有限公司 [2]辽宁国测黄金股份有限公司 [3]辽宁科技大学矿业工程学院

出　　处：《黄金》2024年第12期80-83,88,共5页Gold

基　　金：国家自然科学基金项目(52174254)。

摘　　要：辽宁某金矿石矿物组成相对复杂,原矿金品位为2.90 g/t,其中金矿物粒度细小,且含有较多的碳及易浮选的脉石矿物。该金矿石的金属矿物以黄铁矿和毒砂等为主;矿石内富含片状矿物,如绢云母、白云母、黑云母及石墨,这些因素对金矿物的回收造成了不利影响。金矿物形态为自然金,粒度较细,多以粒状形态嵌布在黄铁矿中及黄铁矿与脉石矿物粒间,仅有少量嵌布于脉石矿物之中。为提升精矿品位,选用SK-503作为活化剂,丁基黄药与SK-9011作为金组合捕收剂,2号油作为起泡剂,工艺流程为一段磨矿至-0.075 mm占比达到93%,进行一次粗选、金粗精矿分级再磨(再磨细度-0.038 mm占比98%)、两次精选及两次扫选。闭路试验所得金精矿金品位提升至25.89 g/t,金回收率达到88.25%,有效提升了企业经济效益。The ore mineral composition of a gold mine in Liaoning is relatively complex,with a raw ore gold grade of 2.90 g/t.The gold minerals are fine-grained and associated with significant amounts of carbon and floatable gangue minerals.The metallic minerals in the ore are primarily pyrite and arsenopyrite.The ore is rich in flaky minerals such as sericite,muscovite,biotite,and graphite,which adversely affect gold recovery.Gold occurs mainly as native gold with fine granularity,primarily embedded in pyrite and between pyrite and gangue minerals,with only a small fraction distributed within gangue minerals.To improve the grade of gold concentrate,SK-503 was selected as an activator,while butyl xanthate and SK-9011 were used as combined collectors for gold.No.2 oil was employed as the frother.The process involved a single-stage grinding with grinding fineness of-0.075 mm accounting for 93%,followed by once roughing.The roughing concentrate was classified and re-ground(second-stage grinding with grinding fineness of-0.038 mm accounting for 98%),then subjected to two-stage cleaning and two-stage scavenging.The closed-circuit test resulted in a gold concentrate with a grade of 25.89 g/t and a gold recovery rate of 88.25%,effectively enhancing the economic benefits of the enterprise.

关 键 词：金矿 浮选 捕收剂 磨矿细度 分级再磨 工艺矿物学 细粒级 

分 类 号：TD952[矿业工程—选矿]