METHOD FOR MAGNETIC CONTROL OF FINE LOOSE MEDIUM FERRIC IMPURITIES Russian patent published in 2016 - IPC B03C1/00 

FIELD: ceramic industry.

SUBSTANCE: invention relates to magnetic separation and can be used in various industries, particularly in production of glass and ceramics, for analysing crude loose media for content of undesirable ferruginous impurities having magnetoactive properties (ferric impurities): their weight ratio (concentration). Method of determining content of loose medium ferric impurities comprises repeated operations of selecting from a sample of loose medium mass the material containing ferric impurities, by mutual displacement of the sample and magnetic system, as well as making additional receiving magnetic exposure on the extracted mass material to separate ferric impurities fractions contained in the material and involved particles fractions of analyzed medium. Mutual displacement of the sample and magnetic system is performed at limited speed, which provides efficient capture of ferric impurities from the sample. Additional receiving magnetic separation of separated material fractions is performed by wet magnetic separation of each operating mass of released material via wetting them in the liquid as dispersion medium to obtain corresponding suspensions, subjected to magnetic effects. Speed of the sample displacement, for example, for use of magnetic elements Nd-Fe-B is set from the condition: where: a is an empirical parameter which characterises used magnetic system (in traditional using magnetic elements Nd-Fe-B, in particular, with diameter of 25 mm and thickness of 10 mm: a≅0.6 N/mm), ρ -density substances of a ferric particle, x-distance of the ferric particle moving from a magnetic system pole.

EFFECT: technical result is increase of accuracy of monitoring ferric impurities of loose medium.

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