National University of Science and Technology “MISiS”, Moscow, Russia:

V. A. Bocharov, Professor, Chair of Dressing and Processing of Minerals and Anthropogenic Raw Materials
V. A. Ignatkina, Professor, Chair of Dressing and Processing of Minerals and Anthropogenic Raw Materials, e-mail: woda@mail.ru
A. A. Kayumov, Post-Graduate Student, Chair of Dressing and Processing of Minerals and Anthropogenic Raw Materials

V. N. Dunaeva was the participant in this work.

Results of investigation of flotation properties of separated minerals were analyzed together with the small size distribution of metals and minerals in the samples of ingrained and massive pyritic ores and flotation products, obtained in laboratory and industrial conditions. Increasing of a ton of raw grinding improves the ore mineral release. The first stage includes the release of macrocrystalline modifications and easily-sliming corroded and fragile types of ore mineral associations of pyrite, secondary copper sulfides, tennantite and rock minerals. Release of growths in ingrained and massive pyritic ores requires various grinding time. The quantity of growths in fine and coarse grades in flotation tails correlates with their distribution in ore material, which shows the discrepancy of process flowsheets to the physical and chemical properties of ore minerals. The ways of improvement of schemes and modes of grinding and flotation were defined: including the varieties of copper minerals and sphalerite into the scheme of inter-cycle operations of continuous ore flotation; release of pyrite modifications in tail fractions in main and final operations.
This work was carried out with the financial support of the grants of the Russian Scientific Fund (project No. 214170039).

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