Joint Enterprise of Scientific and Production Association “RIVS”, Saint Petersburg, Russia:
M. A. Arustamyan, Managing Director

Ural Representation of Scientific and Production Association “RIVS”, Uchaly, Russia:
E. P. Kalinin, Executive Officer, e-mail: ufa@rivs.ru
Yu. B. Alekseeva, Head of Scientific-Research Laboratory

Complex processing of technogenic raw materials (metallurgical slag dumps) is urgent not only from economic, but also from ecological point of view. Decreasing of reserves in ore raw material soils with valuable components (as well as their quality decreasing, considerable growth of mining and miling capital and operating costs) force the metallurgical enterprises to find cheaper raw material sources. Slag dumps, cumulated by metallurgical enterprises for many years of intensive production are prospective for these purposes. Current dump slag samples (Balkhash copper-smelting plant) were investigated together with dump slag samples after natural cooling operation. High production data during flotation concentration of slags depends on copper and other associated components’ content, sulfide grain size, mineral and phase composition, method of slag preparation to flotation, and accepted concentration technology. The mode of slag preparation to further concentration was adjusted for optimization of production data. The slags were processed before concentration: they were naturally cooled, which should provide the formation of large sulfide crystals and make their further opening easier. This method allows to obtain the technical result, shown in increasing of copper extraction in concentrate due to fuller opening of valuable components and decreasing of copper losses with dump tails in the form of joints and free fine mineral grains. The scheme and flotation technology of naturally cooled slag concentration were developed in laboratory conditions, allowing to reach the high production data.

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