Institute of Mining of Far Eastern Branch of Russian Academy of Sciences (Khabarovsk, Russia):

Samatova L. A., Head of Laboratory, Candidate of Engineering Sciences
Shepeta E. D., Senior Researcher, Candidate of Engineering Sciences
Voronova O. V., Researcher

The paper shows the results of investigations of possibility of increasing of complexity of raw material use in the time of dressing of Lermontovskoe deposit ores. Nowadays, scheelite concentrate is the only one product of ore-dressing plant of Lermontovskaya mining company. However, scheelite-skarn-sulfide ores can be productive not only because of tungsten but also because of copper, gold, silver, bismuth and sulfur. Amphibole akarns demonstrate the highest effect of sulfidation, during which amphibole was gradually substituted by pyrrhotite and chalcopyrite. Investigation involved high-sulfide ores of North-West open pit and currently mined ores of Central open pit. There were developed a scheme and several ways of reagent regimes of sulfide cycle with butyl xanthogenate and IMA-I 413 (ИМА-И 413) aerofloat, used as collectors. Three perspective regimes of main sulfide cycle were sorted out. A comparison study on sulfide minerals flotability gave pregerencence to IMA-I 413 flotation agent rather than xanthogenate for arsenopyrite extraction. The investigations resulted in the development of scheme and reagent of sulfide concentrate selection, providing a final copper concentrate, where gold and silver were observed. For decreasing of arsenic content in the concentrate, iron vitriol medium was offered for copper selection.