Author 1:
Name & Surname: Yurlova N. A.
Company: RIVS-Proekt LLC (Saint-Petersburg, Russia)
Work Position: Main specialist
Scientific Degree: Doctor of Biological Sciences
Contacts: e-mail: rivsproject@rivs.ru

Author 2:
Name & Surname: Kaifadzhyan E. A.
Company: Mendeleev Institute for Metrology (Saint-Petersburg, Russia)
Work Position: Senior Researcher
Scientific Degree: Candidate of Engineering Sciences

Author 3:
Name & Surname: Shumskaya E. N.
Company: RIVS Science and Production Association (Saint-Petersburg, Russia)
Work Position: Principal Researcher
Scientific Degree: Candidate of Engineering Sciences
Contacts: e-mail: rivs@rivs.ru

Author 4:
Name & Surname: Poperechnikova O. Yu.
Company: RIVS Science and Production Association (Saint-Petersburg, Russia)
Work Position: Head of Production Research Subdivision

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.

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