东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (3): 413-418.DOI: 10.12068/j.issn.1005-3026.2020.03.020

• 资源与土木工程 • 上一篇    下一篇

海南某金矿尼尔森重选-浮选试验

陈桥, 杨洪英, 佟琳琳   

  1. (东北大学 冶金学院, 辽宁 沈阳110819)
  • 收稿日期:2019-07-10 修回日期:2019-07-10 出版日期:2020-03-15 发布日期:2020-04-10
  • 通讯作者: 陈桥
  • 作者简介:陈桥(1993-),男,甘肃白银人,东北大学博士研究生; 杨洪英(1960-),女,河北张家口人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目 (U1608254).

Processing a Gold Ore from Hainan Province Using Knelson Gravity Concentration-Flotation

CHEN Qiao,YANG Hong-ying,TONG Lin-lin   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2019-07-10 Revised:2019-07-10 Online:2020-03-15 Published:2020-04-10
  • Contact: YANG Hong-ying
  • About author:-
  • Supported by:
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摘要: 以海南某石英脉型金矿石为原料,进行尼尔森重选-浮选试验研究.通过GRG试验得出金矿中重选可回收金质量分数为80.88%.通过条件试验确定了该矿石尼尔森重选-浮选的最佳条件为:磨矿细度-74μm占80%,相对离心力60g,反冲水压16kPa,矿浆质量分数40%,戊基黄药用量200g/t,浮选时间5 min.原矿石品位9.8g/t,利用尼尔森选矿机一次分选可得品位230g/t,金回收率80.30%的重选精矿.重选尾矿品位2.0g/t,经过一次粗选一次精选三次扫选处理,可得浮选精矿品位57.3g/t,浮选金作业回收率75.66%.经尼尔森重选-浮选流程处理后,尾矿金品位降至0.5g/t,全流程金总回收率95.21%.

关键词: 金矿, 尼尔森选矿机, GRG试验, 重选, 浮选

Abstract: The experimental study of Knelson gravity concentration-flotation technology of a quartz-vein type gold ore in Hainan Province was carried out. The GRG(gravity recoverable gold) test showed that the gold content in the gold ore is 80.88%. The optimal technological conditions of Knelson gravity concentration-flotation for the ore were determined by condition test to be a grinding size of 80% powder below 74μm, a relative centrifugal force of 60g, a fluidizing water pressure of 16kPa, a feed slurry mass fraction of 40%, a dosage of amyl xanthate of 200g/t and a flotation time of 5min. A gold concentrate with grade of 230g/t and recovery of 80.30% can obtained from the raw ore(9.8g/t) by gravity separation, and a gold concentrate with grade of 57.3g/t and recovery of 75.66% can be obtained from the gravity separation tailing by a flotation process of one roughing, one cleaning and three scavengings. The gold grade of final tailings is 0.5g/t and the total gold recovery in the Knelson gravity concentration-flotation process is 95.21%.

Key words: gold ore, Knelson concentrator, GRG(gravity recoverable gold) test, gravity concentration, flotation

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