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

Zimin A. V., Chef Executive Officer, Candidate of Engineering Sciences, e-mail: rivs@rivs.ru

Nazarov Yu. P., Leading Researcher, Candidate of Engineering Sciences

Yurlova N. A., Chief Specialist, Doctor of Biological Sciences

The increased requirements of the consumers to the quality of iron-containing concentrates predetermined the improvement of the flotation operational development of magnetite concentrates, obtained by the traditional magnetic technologies. The two-stage opposite cationic flotation technology with the suppression of iron minerals is the most optimal for this type of raw materials. There were developed the technological schemes and reagent regimes, which make it possible to obtain the flotation concentrates with 70-71% of iron, with the extraction of 95 -97% of iron from the initial magnetic concentrate. The usage of toxic and environmentally dangerous reagents in flotation is the larger introduction constraint in the production of the flotation operational development.
There was developed the water circulation technology with the unification of the following operations:
• the flotation operational development tails;
• the liquid phase from the filtration of the main concentrate;
• the magnetic separation tails of the enterprise.
Amine is the basic component of the reagents-collectors of rockformation minerals. As a result of mixing of the foregoing products, the amine concentration in the water phase decreases significantly. Practically, this concentration is much lower than the maximum allowable concentration for the reagents of this group.

1. Shumskaya E. N., Nazarov Yu. P., Smirnov Yu. A., Arustamyan A. M., Kovalchuk Kh. U. Povyshenie kachestva zheleznykh kontsentratov sposobom obratnoy kationnoy flotatsii (Increasing of the iron concentrates quality by method of the opposite cationic flotation). Gornyi Zhurnal – Mining Journal, 2008, Special issue, pp. 49–52.

2. Maksimov I. I., Sentemova V. A., Trubechkova N. S. Flotatsiya okislennykh zhelezistykh kvartsitov kationnymi sobiratelyami (Flotation of oxidized ferruginous quartzites by the cationic collectors). Obogashchenie Rud – Mineral processing, 2012, No. 2.

3. Prikaz Ministerstva prirodnykh resursov RF ot 17 dekabrya 2007 goda № 333 «Ob utverzhdenii metodiki razrabotki normativov dopustimykh sbrosov veshchestv i mikroorganizmov v vodnye obekty dlya vodopolzovaniya» (Order of the Ministry of Natural Resources of Russian Federation from December 17, 2007, No. 333 «About the approval of the development methodology of the acceptable discharge normatives of substances and microorganisms in the water objects for water consumption").

4. Liu Wen-gang, Wei De-zhou, Cui Bao-yu. Collecting performances of N-dodecylethylene-diamine and its adsorption mechanism on mineral surface. Transactions of Nonferrous Metals Society of China, 2011, No. 21.

5. Predelno dopustimye kontsentratsii (PDK) khimicheskikh veshchestv v vode vodnykh obektov khozyaystvenno-pitevogo i kulturno-bytovogo vodopolzovaniya. Gigienicheskie normativy GN 2.1.5.1316-03 (Maximum allowable concentrations of chemical substances in the water of water objects of the householddrinking and cultural-personal water usage. Hygiene regulations HR 2.1.5.1316-03).

6. Yurlova N. A. Gornyi Zhurnal – Mining Journal, 2010, No. 10, pp. 101–104.