FIELD: process engineering.
SUBSTANCE: invention relates to production of construction materials and may be used in making acid-proof powders. Method comprises drying mineral stock composed of crushed gabbro-diabase, drying and sizing in classifier. Particles of one portion of said mineral stock is sized at classifier. Particles sized to over 0.16 mm are minced and mixed with the next portion of mineral stock not crushed. Said mixed stock is fed against to classifier to feed particles sized to 0.16 mm into bin for finished products.
EFFECT: higher quality.
1 cl, 1 dwg, 1 tbl
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