FIELD: metallurgy.
SUBSTANCE: raw materials, including secondary raw materials containing CaO, MgO, are mixed in such a way that the weight ratio of CaO/SiO2 reached 0.8 or more and the mass ratio of MgO/SiO2 reached 0.4 or more. Mixed raw materials are granulated into unfired pellets having a distribution of specified size, and are burnt by heating at temperatures ranging from 1220 to 1300°C. At that the self-fluxing pellets are formed, which have an average size of 10 to 13 mm and distribution according to size in which the 6% weight or less of the pellets have a particle size of 4 mm or more but less than 8 mm, and 7% of weight or less of the pellets have particle size of 15 mm or more but less than 20 mm.
EFFECT: improved ability to restore high-temperature chemical pellets and improved gas permeability of the pellets layer.
2 cl, 2 dwg, 3 tbl
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