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Gold Science and Technology ›› 2015, Vol. 23 ›› Issue (6): 92-96.doi: 10.11872/j.issn.1005-2518.2015.06.092

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Experimental Study on a Quartz-vein Type Gold Ore Using Knelson Centri-fugal Concentrator

XIAO Jun1，2，DONG Yanhong1，2   

  1. 1.Hunan Research Institute for Non-ferrous Metals，Changsha    410100，Hunan，China；
    2.Hunan Provincial Key Laboratory for Complex Copper Lead Zinc Associated Metal Resources Comprehensive Utilization，Changsha    410100，Hunan，China
  • Received:2015-04-27 Revised:2015-08-04 Online:2015-12-28 Published:2016-02-25

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Abstract:

In order to retrieve gold resources from a quartz-vein type gold ore，the dressing tests using Knelson concentrator are conducted under the condition of coarse grinding.Based on the results of process mineralogy，the occurrence state of gold and disseminated features are analyzed.Combined with the production situation of serious loss in the gold tailings in the whole floatation process，the process of gravity-floatation joint technology mainly on Knelson concentrator is put forward to replace the previous whole floatation process.The results show that Knelson concentrator could recycle coarse free gold mineral when the gravity value is 60G，feeding speed is 3 kg/min，counterflush pressure is 0.04 MPa and fluidzed feeding volume is 3 kg/min.The obtained industrial test indexs show that compared with the single floatation technology，the gravity-floatation joint technology can lead to the increase of the recovery rate of gold by 19%.

Key words: quartz-vein type, Knelson centrifugal concentrator, gravity separation, natural gold

CLC Number: 

  • TD953

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