Tozik V. M., manager of Smelter shop, Lazarev V. I., manager of technical department, Metallurgical plant of the transpolar affiliate of the «Norilsky Nickel» Ore mining and smelting integrated works; Danilov M. P., manager of pyrometallurgy laboratory, Potantsev V. A., chief specialist of pyrometallurgy laboratory, «Institute «Norilskproject» OOO «Institute Gipronickel» Norilsk affiliate