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

Arustamyan K. M., Mechanical Engineer, e-mail: rivs@rivs.ru

There has been recently increased the interest of specialists and leaders of ore dressing and processing enterprises to the introduction of the concentration technology of iron ore raw materials, directed on the obtaining of more high quality marketable products. In the first place, it is connected with the quality increasing of non-conditional concentrates (less than 60% of the total iron), which extends the economical efficiency of ore-dressing and processing enterprises for metallurgical enterprises and decreases the costs on the metallurgical production stage. The processing plant «Carmen», included in Carmen Copper Corporation, processes the copper-porphyritic ores and produces copper and magnetite concentrates. The copper concentrate is obtained by the flotation method. The magnetite concentrate is obtained by wet magnetic separation. Nowadays, the iron content in the concentrate, obtained on the «Carmen» processing plant from the currently extracted ores, does not exceed 50–51 % with the high content of silica (to 18 %). In 2011, the governing body of Carmen Copper Corporation gave the task to Science and Production Association "RIVS" to hold the operational development of magnetic concentrate with obtaining of the product, which contains not less than 60 % of iron. The researches of the factory tests of magnetite concentrate were held by the technologists from Science and Production Association "RIVS". The technology was developed for the opposite kationic flotation of magnetite concentrate. The range of reagents-collectors for quartz and aluminosilicates was tested, along with the optimization of re-crushing regime. The new technology makes it possible to obtain the high quality concentrate (not less than 60% of iron), in the flotation finishing tail.