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黄金科学技术 ›› 2018, Vol. 26 ›› Issue (2): 203-211.doi: 10.11872/j.issn.1005-2518.2018.02.203

• 采选技术与矿山管理 • 上一篇    下一篇

某重选尾矿金浮选试验研究

杨玮,董萍,邓忠   

  1. 西安建筑科技大学材料与矿资学院,陕西 西安 710055
  • 收稿日期:2017-08-15 修回日期:2017-12-30 出版日期:2018-04-30 发布日期:2018-05-19
  • 通讯作者: 董萍(1994-),女,陕西西安人,硕士研究生,从事黄金选冶和二次资源综合回收研究工作。401442329@qq.com
  • 作者简介:杨玮(1971-),男,河南灵宝人,教授,博士,从事选矿、湿法冶金及资源综合回收技术研究工作。ywmsco@126.com
  • 基金资助:
    国家自然科学基金项目“氧化铅(PbO)强化难处理高铜金精矿氰化浸出过程的基础研究”(编号:51474169)和陕西省工业科技攻关项目“碲化物型难处理金矿金银碲综合回收技术研究”(编号:2016GY-154)联合资助
     

Experimental Study on Gold Flotation of Gravity Tailings

YANG Wei,DONG Ping,DENG Zhong   

  1. College of Materials and Mineral Resources,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi,China
  • Received:2017-08-15 Revised:2017-12-30 Online:2018-04-30 Published:2018-05-19

摘要:

在工艺矿物学研究的基础上,对某重选尾矿(主要载金矿物为磁黄铁矿和黄铁矿)中的金的综合回收利用开展了选矿试验研究。在磨矿细度为-0.074 mm含量占70 %,用NaOH调节矿浆pH=8,捕收剂为异戊基黄药(80 g/t)+丁铵黑药(40 g/t),浮选浓度为33 %,粗选时间为3 min的条件下,通过一粗两精三扫的闭路试验流程,可获得金品位为28.40 g/t的浮选精矿,金回收率达到93.47%。通过试验研究发现:在低碱度条件下,采用NaOH作pH调整剂时金的浮选效果明显优于石灰;与丁基黄药相比,使用异戊基黄药作捕收剂,对石灰体系下金回收率的提高效果更好;同时,黄药与黑药的混合使用会起到“协同作用”,也能够明显提高金的选别效果。

关键词: 重选金尾矿, 磁黄铁矿, 浮选, 调整剂, 捕收剂

Abstract:

Based on the mineralogy characteristics,the research on the comprehensive recovery and utilization of gold in a gravity separation tailings (the main gold-bearing minerals are pyrrhotite and pyrite)was carried out.Under the condition that the gringding fineness is -0.074 mm content of 70%,NaOH is used to adjust the pulp pH=8,the collector is isoamyl xanthate+ammonium butylate,the flotation concentration is 33%,the coarse selection time is 3 min,the flotation concentrate with gold grade of 28.40 g/t can be obtained through a closed test process of one stage roughing,two stage cleaning and three stage scavenging,and the recovery rate of gold was 93.47%.It is found through experimental research that under the condition of low alkalinity,when NaOH is used as pH regulator,the flotation effect of gold is better than lime;Compared with butyl xanthate,unsing isoamyl xanthate as collector has a better effect on improving the recovery rate of gold under lime syste;At the same time,the combination of xanthate and aerofloat will play a synergistic role,which can also significantly improve the gold separation effect.

Key words: gravity tailing of gold, pyrrhotite, flotation, regulator;collector

中图分类号: 

  • TD923.7

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