Open-circuit flotation of copper sulfide ore with froth treatment in narrowing chutes

This paper discusses capabilities of open-circuit flotation with separate treatment of different-quality froth. One of the ways of enhancing efficiency of open-circuit flotation in treatment of froth in converging chutes, which ensures efficient separation of froth into concentrate and tailings owing to stimulation of secondary concentration of mineral in the froth. The calculation procedure of the froth separation performance in converging chutes is described. This procedure uses relation of mass fraction of copper in overflow and the overflow yield, which allows determining the overflow yield at the preset overflow quality. The lab-scale and full-scale testing data of a converging chute are presented, and the producibility of the standard quality copper concentrate in the overflow is demonstrated. The forward calculation of open-circuit flotation performance with separate treatment of different-quality froth is presented as a case-study of Shatyrkul ore. It is found that treatment of froth in the converging chutes in bulk, and in the first and second recleaner flotation stages enables increasing recovery of copper in concentrate from 82.5 to 89.3% with production of the concentrate with copper mass fraction of 20%. The relevance of the converging chutes in froth treatment in open-circuit flotation is disclosed.

Koltunov A. V., Valieva O. S., Intogarova T. I., Khamidulin I. Kh. Open-circuit flotation of copper sulfide ore with froth treatment in narrowing chutes. MIAB. Mining Inf. Anal. Bull. 2021;(11-1):318—327. [In Russ]. DOI: 10.25018/0236_1493_2021_111_0_318.

Koltunov A. V.¹, Cand. Sci. (Eng.), Associate Professor at Mineral Processing Department, e-mail: tails2002@inbox.ru;
Valieva O. S.², Senior Lecturer at the Department of Mining;
Intogarova T. I.², Senior Lecturer at the Department of Mining;
Khamidulin I. Kh.¹, Cand. Sci. (Geol.), Associate Professor at Mineral Processing Department, e-mail: tails2002@inbox.ru;
¹ Ural State Mining University, Yekaterinburg, Russia;
² Mirny Polytechnic Institute, Branch of the Ammosov North-Eastern Federal University, Mirny, Russia.

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