FIELD: process engineering.
SUBSTANCE: invention relates to grinding of solid amorphous chemical substances to produce particles with mean diameter d50<1.5 mcm. Method of grinding comprises operating jet-type mill with work medium selected from the group consisting of gas and/or steam, preferably, steam and/or gas containing steam. At heating, that is, directly prior to work with operating medium, milling chamber is heated to make mill outlet and/or milling chamber temperature exceeding steam and/or working medium dew point. Solid amorphous powder substance features mean particle size d50(TAM) < 1.5 mcm, index d90(TAM) < 1.8 mcm and index d99(TAM) < 2 mcm.
EFFECT: new fine powder solid amorphous substances to be used in coatings.
25 cl, 14 dwg, 4 tbl, 3 ex
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