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

Shumskaya E. N., Leading Researcher, Candidate of Engineering Sciences

Poperechnikova O. Yu., Processing Engineer

E-mail (common): rivs@rivs.ru

In recent years, Scientific and Production Association "RIVS" have been carrying out the improvement of concentration technology of iron ore raw materials, including the development of efficient concentration technology of oxidized ferruginous quartzites. Involving the oxidized ferruginous quartzites into the processing stage is considered as the prospective source of increasing of iron concentrates production without increasing of extraction amounts of magnetite ores. During the extraction and processing of magnetite ores, the part of oxidized ferruginous quartzites on iron-ore enterprises reaches to 10–30%. However, these quartzites are lost with the processing tails by 90%. According to the order of Inguletskiy Ore Dressing and Processing Enterprise (Ukraine), Scientific and Production Association "RIVS" held the reasonability definition of involving of 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 concentration 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 μm of the grain fineness, quartz is characterized by 50–70 μm), the choice of concentration technology of these raw materials is considered as a complex task. During the researches, it was established, that application of gravitational and magnetic mathods is non-efficient. That`s why, flotation is, practically, the only one possible method. According to the research results of various flotation schemes, there was recommended the opposite cationic flotation technology for oxidized ferruginous quarzites of Inguletskiy deposit, with application of reagents from Glariant company. According to the developed technology on circulating water of Inguletskiy Ore Dressing and Processing Enterprise, there was obtained the concentrate, which contains 66.76 % of iron (with extraction of 84.54% of iron) and 2.75% of SiO₂. There is planned to hold the half industrial testings of the recommended technology.