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Gold Science and Technology ›› 2017, Vol. 25 ›› Issue (6): 121-126.doi: 10.11872/j.issn.1005-2518.2017.06.121

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Selective Precipitation of Iron from Bio-oxidation Liquid of Gold Extraction

DUAN Minjing1,LIANG Changli2,XU Baoquan2,CHEN Lingkang2   

  1. 1.School of Architectural and Surveying & Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou    341000,Jiangxi,China;
    2.Faculty of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000    Jiangxi,China
  • Received:2017-05-09 Revised:2017-07-26 Online:2017-12-30 Published:2018-05-18

Abstract:

The effect of pH value,temperature,diammonium hydrogen phosphate concentration,feeding ways and precipitate time on the selective precipitation of iron from bio-oxidation liquid of gold ore was studied,by taking bio-oxidation liquid of gold extraction as the research object and diammonium hydrogen phosphate as precipitant.The precipitation rate of iron reached 95.2% and the residual rate of arsenic in the bio-oxidation liquid was 93.6% under the conditions:flow the bio-oxidation liquid and 0.2 g/mL diammonium hydrogen phosphate at the same time,and adjust the pH value to 2.0 by adjust the flow rate of diammonium hydrogen phosphate,precipitate at 60 ℃ for 2.5 hours.XRD spectrum confirmed the precipitation of iron was mainly composed of ferric phosphate and ferrous dihydrogen phosphate.The results confirmed the selective precipitation of iron from bio-oxidation liquid,which can provide theoretic guidance to recovery valuable components such as iron and arsenic from bio-oxidation liquid.

Key words:  liquid of bio-oxidation of gold extraction, diammonium hydrogen phosphate, ferric phosphate, selective precipitation, valuable content, comprehensive recovery

CLC Number: 

  • TF831

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