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Gold Science and Technology ›› 2015, Vol. 23 ›› Issue (3): 89-92.doi: 10.11872/j.issn.1005-2518.2015.03.089

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Adsorption of Hydrogen Cyanide by the Barren Liquor in a Gold Refinery

BIAN Xiaodong，SONG Guangjun，LI Xiao，SONG Pei   

  1. Refinery of Shandong Gold Mining （Laizhou） Co.，Ltd.，Laizhou   261400，Shandong，China
  • Received:2014-12-10 Revised:2015-02-03 Online:2015-06-28 Published:2015-11-16

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Abstract:

A gold refinery in Shandong used acidification HCN to treat wastewater containing cyanide.And then the plant used NaOH solution to adsorb produced during acidification，which not only took high cost and large amount of labor for workers，but also increasing Na+ in the system，then increasing the risk of clogging the pipeline by Na2SO4 in winter.To solve the problems above，this paper focuses on using lime solution to adsorb HCN，replacing NaOH solution.Tests in laboratory mainly explored the adsorption capacity of different concentrations lime to absorb hydrogen cyanide and the amount of barren liquor in the tests.Laboratory tests verify the feasibility of lime solution to adsorb HCN.

Key words: wastewater treatment, HCN, lime solution concentration, barren liquor quantity

CLC Number: 

  • TF831

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