FIELD: process engineering.
SUBSTANCE: proposed method comprises first stage whereat mix is heated to required moulding temperature and second stage whereat said mix is mixed with binding agent in closed conditions. Note here that second stage working pressure is lower than that of the first stage. Mix features grain size varying from 0.01 to 5 mm, in particular, to 1 mm. Thereafter, next technological stages are performed.
EFFECT: ruled out harmful emissions.
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