Scholarlink

Abstract— <p>The bioleaching of nickel–copper sulfide ore, two sulfide copper–nickel concentrates, and copper–zinc concentrate were studied. It was demonstrated that specific rates of nickel leaching differed little for all the types of raw materials studied. Thus, this value was 59.3 for the ore, 58.7 for concentrate 1, and 54.4 mg/(g&#xa0;day) and for concentrate 2, respectively. The content of nickel decreased from 4.6–7.5 (in the initial raw material) to 0.71–0.85% (bioleaching product). The specific rate of zinc leaching from the copper–zinc concentrate was 248.6 mg/(g&#xa0;day). Zinc extraction reached 98.5% with a decrease in its content from 7.4 in the initial concentrate to 0.21% in the residue after leaching. The specific rate of copper leaching (7.3–14.8 mg/(g&#xa0;day)) was lower compared to nickel and zinc. At the same time, unlike nickel and zinc, the content of copper in the bioleaching residues increased: in the case of copper–nickel concentrates, from 15.1 to 17.8% (concentrate 1) and from 19.1 to 19.7% (concentrate 2); in the case of the copper–zinc concentrate, from 10.1 to 16.1%. Thus, copper concentrates with a content of copper of 16–19% (high enough to meet the standards for pyrometallurgical processing) were formed in sediments during bioleaching of all the concentrates studied. A comparative analysis of the processes of leaching of the selected raw materials will allow us to estimate the prospects of applying the studied approach for processing enrichment products and ores of different compositions and with different ratios of nonferrous metal minerals.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of the Mineral Composition of Sulfide Raw Materials on the Bioleaching of Nonferrous Metals

  • 期刊论文

  • 发表日期：

    2025年4月1日

查看全文
  • A. G. Bulaev,
  • M. I. Muravyov,
  • V. S. Melamud,
  • N. V. Fomchenko

摘要

Abstract—

The bioleaching of nickel–copper sulfide ore, two sulfide copper–nickel concentrates, and copper–zinc concentrate were studied. It was demonstrated that specific rates of nickel leaching differed little for all the types of raw materials studied. Thus, this value was 59.3 for the ore, 58.7 for concentrate 1, and 54.4 mg/(g day) and for concentrate 2, respectively. The content of nickel decreased from 4.6–7.5 (in the initial raw material) to 0.71–0.85% (bioleaching product). The specific rate of zinc leaching from the copper–zinc concentrate was 248.6 mg/(g day). Zinc extraction reached 98.5% with a decrease in its content from 7.4 in the initial concentrate to 0.21% in the residue after leaching. The specific rate of copper leaching (7.3–14.8 mg/(g day)) was lower compared to nickel and zinc. At the same time, unlike nickel and zinc, the content of copper in the bioleaching residues increased: in the case of copper–nickel concentrates, from 15.1 to 17.8% (concentrate 1) and from 19.1 to 19.7% (concentrate 2); in the case of the copper–zinc concentrate, from 10.1 to 16.1%. Thus, copper concentrates with a content of copper of 16–19% (high enough to meet the standards for pyrometallurgical processing) were formed in sediments during bioleaching of all the concentrates studied. A comparative analysis of the processes of leaching of the selected raw materials will allow us to estimate the prospects of applying the studied approach for processing enrichment products and ores of different compositions and with different ratios of nonferrous metal minerals.