Combined technology for gold desorption and ionite regeneration in the conical device

Authors

  • Sh.Ch. Altynbek Satbayev University
  • A.O. Baikonurova Satbayev University
  • L.S. Bolotova State scientific-industrial association of industrial ecology Kazmekhanobr
  • B. Misra Worcester Polytechnic Institute

DOI:

https://doi.org/10.31643/2018/6445.13

Keywords:

elution, desorption, combined technology, anion exchanger, thiocyanate solutions, acid thiourea solutions.

Abstract

The principal technological scheme of desorption of gold and concomitant metal-impurities from the AM-2B resin phase used for the sorption processing of gold-bearing ores is considered. The proposed combined scheme, involving the use of two traditional, independent from each other methods (thiocyanate and acid-thiourea) for eluting gold, includes desorption of metal impurities from the resin with alkaline solutions of sodium thiocyanate, and gold with sulfuric acid solutions of thiourea. To shorten the duration of the process research of proposed technology was carried out the in a conical apparatus. The results of study of the elution of gold and impurity metals from anionite saturated with the following components, mg/g: Au – 2.6; Cu – 3.5; Zn – 1.3; Ni – 2.9; Co – 3.3, are given. It is shown that the main amount of impurity metals is desorbed from the resin upon its thiocyanate treatment, while the transition of gold into the eluate is negligible. The composition of the eluate in the thiocyanate treatment of saturated resin is, mg/l: Au – 1.7; Cu – 156.0; Zn – 53.0; Ni – 89.0; Co – 102.0. The subsequent treatment of the resin with sulfuric acid solutions of thiourea allows the conversion of 89.32 % of gold from the ion exchanger into the eluate. The resulting eluates containing ~113.0 mg/l gold and a small amount of impurities are target solutions for obtaining a valuable metal. The ion exchanger was regenerated by washing with water and treating with an alkaline solution of sodium to convert it to OH form, since gold sorption is carried out from alkaline cyanide solutions of heap leaching. Residual contents of components in the resin after regeneration were, mg/g: Au – 0.24; Cu – 0.23; Zn – 0.15; Ni – 0.07; Co – 1.29, which allows the successful use of the regenerated resin in the next stage of sorption.

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Author Biographies

Sh.Ch. Altynbek, Satbayev University

Master of technical sciences, researcher of the noble metals laboratory, PhD student 3rd year PhD, 6D070900 – metallurgy, The Branch of the Republican State Enterprise «National center on complex processing of mineral raw materials of the Republic of Kazakhstan» State scientific-industrial association of industrial ecology Kazmekhanobr, noble metals laboratory.

A.O. Baikonurova, Satbayev University

Professor, doctor of technical sciences, professor of metallurgical processes, heat engineering and technology of special materials, Kazakh National Research Technical University named after K.I. Satpayev, Metallurgical processes, heat engineering and technology of special materials.

L.S. Bolotova, State scientific-industrial association of industrial ecology Kazmekhanobr

Candidate of chemical sciences , head of the laboratory of precious metals, The Branch of the Republican State Enterprise «National center on complex processing of mineral raw materials of the Republic of Kazakhstan» State scientific-industrial association of industrial ecology Kazmekhanobr, noble metals laboratory.

B. Misra, Worcester Polytechnic Institute

Professor, doctor of technical sciences, director of the institute, Worcester Polytechnic Institute.

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Published

2018-07-31

How to Cite

Altynbek, S., Baikonurova А., Bolotova, L., & Misra, B. (2018). Combined technology for gold desorption and ionite regeneration in the conical device. Kompleksnoe Ispolzovanie Mineralnogo Syra = Complex Use of Mineral Resources, 306(3), 21–29. https://doi.org/10.31643/2018/6445.13