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ArticleName Pneumatic separation in the processing of magnetite ores
DOI 10.17580/or.2020.02.06
ArticleAuthor Chokin K. Sh., Edilbaev A. I., Edilbaev B. A., Yugay V. D.

Satbayev University, Institute of Physics and Technology (Almaty, Kazakhstan):

Chokin K. Sh., Chief Researcher, Doctor of Physical and Mathematical Sciences,


Gornoe Buro LLP (Almaty, Kazakhstan):

Yedilbayev A. I., General Director, Doctor of Engineering Sciences,
Yedilbayev B. A., Project Director,


Bapy Mining LLP (Almaty, Kazakhstan):

Yugay V. D., Director, Candidate of Engineering Sciences,


A study of the method of pneumatic magnetic separation was completed, when finely preground material was loosened and separated into individual particles in a dust-air mixture generator. The mixture was then used for the magnetic separation of particles. Mathematical modeling of the dust-air mixture motion in a magnetic field allowed compiling recommendations for the design and manufacture of a pilot pneumatic magnetic separator. Performance characteristics of the device were studied for the fine particle class, separated from the dry concentration middlings using a specifically manufactured pneumatic louver classifier with reverse air suction. In the experiment, high concentration rates for refractory magnetite ores were obtained at the dust-air mixture velocities of 11.2 to 24.9 m/s. The pneumatic magnetic separator demonstrated good performance at high air mixture concentrations of at least μ = 9.6 kg/kg. Its specific load per 1 m of the working length of the drum is defined as 10–12 t/h·m.
The results were obtained in the implementation of project AR05134706 «Development of innovative technology for direct reduction of iron ore using solid fuels and construction of a laboratoryscale system for its complete processing from concentration to metallized iron», implemented under the grant funding for 2018–2020 from the state budget of the Republic of Kazakhstan.

keywords Magnetic separation, concentration, magnetic susceptibility, processing, magnetite, classification, extraction, ore, intergrown pieces

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