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J4 ›› 2009, Vol. 17 ›› Issue (4): 39-46.

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Preliminary Study on theMechanism of Gold Recovery Using the Coal Gold Agglomeration Process

SONG Guixue, FENGMingzhao, WANG Jufang   

  1. Xinjiang Technical Institute of Physics and Chem istry, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
  • Received:2008-11-05 Revised:2009-01-22 Online:2009-08-30 Published:2009-09-29

Abstract:

In this article, the research status of the coal gold agglomeration (CGA) were introduced and a few major factors affecting coal-gold-oil agglomeration were discussed, such as coal chemistry, oil characteristics, and interaction among hydrophobic particles. Moreover, agitation intensity and contact time were also studied for gold recovery kinetics in CGA process. In the case of the same gold ore and other same conditions, the gold recovery kinetics rate coefficient is constant under the different agitation speed. The coal-oil agglomerateswere found having abilities of gold recovery with collector-free, the gold recoverywas up to 77%~86%. The addition of sodium sulfide (160~260 g/t) can activate the surface of gold particles, increase the gold recovery while the floatability of sulfides in gold pulp slightly decreased.

Key words: Coal-gold agglomeration process, Agglomeration mechanism, Collector-free flotation, Gold recovery kinetics

CLC Number: 

  • P618.01


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