Numerous data on the magnetic separation of raw materials for the production of glass and ceramics are summarized with an additional key indicator - the separation efficiency (relative decrease in the content of ferrous impurities); an unsystematic scatter of these data is revealed. It was stated that the results of traditional control (in terms of the "single" form of Fe 2 O 3 impurities), giving reason to judge the presence of a formal concentration dependence, nevertheless do not allow a logical systematization of the accumulated data array with an assessment of the media according to the "propensity" to separation and the assessment of separators according to their targeted preference. For targeted control of impurities (active in the separator), it is recommended to use the magnetic control method.
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