Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (3): 413-418.DOI: 10.12068/j.issn.1005-3026.2020.03.020

• Resources & Civil Engineering • Previous Articles     Next Articles

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
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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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