RIVS-proekt:

Yurlova N. A., Principal Specialist, Doctor of Biological Sciences, e-mail: rivsproject@rivs.ru

RIVS Science and Production Association:

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

Mendeleev Institute for Metrology:

Kaifadzhyan E. A., Senior Researcher, Candidate of Engineering Sciences, e-mail: kayfadzhyan@rambler.ru

RIVS Science and Production Association:

Poperechnikova O. Yu., Head of subdivision, e-mail: rivs@rivs.ru

RIVS accomplishes a whole range of work aimed at improvement of iron ore dressing tech nology and equipment. The scope of work includes flotation of magnetite concentrates toward enhancement of their quality, including production of super concentrates, and development of efficient processing technology for ferruginous quartzites. Cationic amine-bearing surface active substances (CABS) are widely used in hematite ore dressing. It is required to control CABS residual content as these substances are highly toxic and hazardous for the environment. The measurement of concentrations of flotation agents used spectrophotometric analysis (a simple, inexpensive but low selective method) and more selective technique of gas-liquid partition chromatography based on the certified procedures. It is recommended to carry out the production ecology monitoring using selective methods for estimating concentrations of flotation agents, including calculation of standards for allowable wastewater discharges in surface bodies or onto local terrain. The authors show that flotation-opposite process of CABS desorption can take place in tailings pulp slurry, which results in higher concentration of CABS in recirculated water. However, CABS undergo chemical transformation with time, and their concentration in recirculated water and in water phase in tailings ponds reduces. Decomposition of CABS runs more intensive under higher temperature. RIVS Science and Production Association carries out a wide range of work aimed at improvement of iron ore dressing technology and equipment. The scope of work embraces flotation of magnetite concentrates toward their quality refinement and production of superconcentrates, and development of efficient technology for oxidized ferruginous quartzite dressing. Concentration of hematite ore uses cation amine-containing surface active agents (AC SAA). It is required to control the remaining content of highly toxic and ecologically hazardous AC SAA. Concentration of flotation agents was measured using the spectrophotometric method (simple, inexpensive but less selective) and the selective method of gas–liquid partition chromatography based on certified procedures. The industrial environmental monitoring advises to use the selective methods to estimate concentration of flotation agents, including calculation of effluents treated to standard quality. The article shows that desorption of AC SAA can run in pulp slurry, which results in higher concentration of AC SAA in the recycling water. However, in the course of time, AC SAA undergo chemical transformation and their content in the recycling water and liquid phase of tailings reduces. The process of AC SAA decomposition intensifies under higher temperature.

1. Bachurin B. A., Odintsova T. A., Petrova E. S. Fizikokhimicheskie aspekty formirovaniya sostava otkhodov gornoobogatitelnogo proizvodstva (Physical-chemical aspects of formation of waste composition of ore-dressing works). Gornyi Zhurnal = Mining Journal. 2013. No. 6. pp. 86–89.
2. Metodika vypolneniya izmereniya massovoy kontsentratsii reagenta, otnosyashchegosya k klassu kationaktivnykh poverkhnostno-aktivnykh veshchestv, soderzhashchikh v svoem sostave aminnuyu gruppu, yavlyayushchimsya osnovnym deystvuyushchim veshchestvom pri protsesse flotatsii zheleznykh rud (Procedure of measurements of mass concentration of reagent (belonging to cation-active surface-active aminogen group-containing substances), which is the basic active material in iron ore flotation process). Saint Petersburg, 2004. 11 p. (in Russian).
3. Metodika vypolneniya izmereniy soderzhaniya flotoreagenta v vodnoy srede metodom gazozhidkostnoy khromatografii (GZhKh) M-MVI-206-08, utverzhdennaya Obshchestvom s Ogranichennoy Otvetstvennosyu «Monitoring» (Procedure of measurements of content of flotation reagent in aqueous medium by gas-liquid chromatography method M-MVI-206-08 (М-МВИ-206-08), approved by LLC “Monitoring”). Saint Petersburg, 2008. 18 p. (in Russian).
4. Metodika vypolneniya izmereniy soderzhaniya flotoreagenta v tverdoy faze metodom gazozhidkostnoy khromatografii M-MVI-207-08, utverzhdennaya Obshchestvom s Ogranichennoy Otvetstvennosyu «Monitoring» (Procedure of measurements of content of flotation reagent in solid phase by gas-liquid chromatography method M-MVI-207-08 (М-МВИ-207-08), approved by LLC “Monitoring”). Saint Petersburg, 2008. 19 p. (in Russian).
5. Yurlova N. A. Ekologicheskie aspekty pri proektirovanii obektov i predpriyatiy gorno-dobyvayushchego kompleksa (Ecological aspects in the time of designing of objects and enterprises of mining complex). Gornyi Zhurnal = Mining Journal. 2010. No. 10. pp. 101–104.