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ArticleName Hydrometallurgical technologies of processing low-grade and low-quality copper concentrates
DOI 10.17580/gzh.2023.10.05
ArticleAuthor Boduen A. Ya.

RIVS Group, Saint-Petersburg, Russia

A. Ya. Boduen, Director of the Hydrometallurgical Department, Candidate of Engineering, Sciences,


The base of the modern copper production is the pyrometallurgical technologies aimed at obtaining rich concentrates. However, the global trends demonstrate a steady decrease in the quality of raw materials, which entails infeasibility of producing high-quality concentrates from some types of ore without heavy losses of valuable components. One of the ways of dealing with the problems connected with processing of low-grade and low-quality raw materials is the intelligent combination of the concentrating, pyro- and hydrometallurgical operations which can make a framework for the ecologically and economically efficient technologies for the high-level processing of raw materials with the incremental marketable production. The aim of this study is to examine efficiency of the hydrometallurgical technologies in conditioning of low-grade copper–pyrite concentrates and in processing of low-quality copper concentrates produced in treatment of low-grade and complex ore of cupriferous sandstone. In case of the low-grade pyritic concentrates, the study focused on the potential of their autoclaving to increase their grade up to the state standard GOST R 52998–2008 with by-production of zinc-bearing solution meant for extraction of zinc as an additional marketable product. For the second-category concentrates, the parameters of autoclave ammonia leaching are determined to be such that to selectively transfer 97 % of copper and 91.5 % of silver to solution in a single process step, without iron and rock-forming minerals. The base stages of a process flowsheet are developed for the bulk processing of low-quality copper concentrates.

keywords Hydrometallurgy, low-grade and low-quality copper concentrate, autoclave conditioning, autoclave ammonia leaching

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