Abstract
The paper presents experimental results of completely demagnetized fine ferromagnetic particles classification in an upward laminar flow. The efficiency of classification was estimated and mathematical model of the process was defined using software for data analysis and visualization SigmaPlot. The attention is paid to the fact, that classification of demagnetized particles is about 5 times more effective. It can be explained with the fact of magnetic flocculation. That is, fine ferromagnetic particles form large floccules, and if these floccules are not broken, all of them fall into underflow product, regardless to the fineness of the sample. Conclusions are drawn about the fact that residual magnetization of magnetite particles effects on the efficiency of their classification. Moreover, classification of completely demagnetized magnetite allows to reduce its cost, as the number of grinding equipment can be significantly reduced.
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