Science and Production Association "RIVS" JSC, Saint Petersburg, Russia:

Shumskaya E. N., Leading Researcher, Candidate of Engineering Sciences, e-mail: rivs@rivs.ru

Poperechnikova O. Yu., Mechanical Engineer

In recent years, Science and Production Association "RIVS" have been carrying out the improvement of the concentration technology of iron ore raw materials, including the development of the efficient concentration technology of oxidized ferruginous quartzites. Involving the oxidized ferruginous quartzites into the processing, is considered as the prospective source of the production increasing of iron concentrates without the increasing of extraction volumes of magnetite ores. With the extraction and processing of magnetite ores, the part of oxidized ferruginous quartzites on iron-ore enterprises reaches to 10—30%, which are lost with the processing tails by 90%. According to the order of Inguletskiy Ore Dressing and Processing Enterprise (Ukraine), Science and Production Association "RIVS" held the reazonability definition of involving the oxidized ferruginous quartzites into the processing. Nowadays, hematite quartzites are not being developed. However, these quartzites are considered as raw materials for Kryvyi Rih Ore-Dressing and Processing Enterprise of oxidized ores, and for the projected concentrating plants of Krivbass ore-dressing and processing enterprises and mines. According to the dissemination of minerals in the oxidized ferruginous quarzites of Inguletskiy deposit (hematite is characterized by 10-50 micron of the grain fineness, quartz is characterized by 50-70 micron), the choice of the concentration technology of these raw materials is the complex task. During the researches, it was established, that the application of gravitational and magnetic mathods is non-efficient. That`s why, the flotation method is practically the only one possible. According to the research results of various flotation schemes, there was recommended the opposite cationic flotation technology for oxidized ferruginous quarzites of Inguletskiy deposit, using the reagents from Glariant company. According to the developed technology on the reused water of Inguletskiy Ore Dressing and Processing Enterprise, there was obtained the concentrate, which contains 66,76 % of iron (with the extraction of 84,54 % of iron) and 2,75 % of SiO₂.