METHOD FOR PREPARATION OF SINTER BURDEN FOR SINTERING Russian patent published in 1995 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: method for preparation of sinter burden for sintering includes metering and introduction of iron-containing materials into burden, recycle products of metallurgical process, fluxes and fuels, their mixing and pelletizing. A part of recycle metallurgical products is introduced in form of metal concentrate produced by treatment and concentration of metallurgical nonutilizable wastes and mixed with iron-containing materials in ratio of (0.02-0.10):1.0, respectively. Metal concentrate is used in fraction of 0-10 mm of the following composition, mas. iron 56.9-86.0; carbon 2.0-4.7; manganese 0.1-1.2; silicon 0.3-3.6; calcium oxide 4.2-16.8; magnesium oxide 0.6-2.4; ferrous oxide 0.5-7.0; manganese oxide 0.01-0.4; silicon dioxide 3.8-15.2; alumina 0.7-3.6; phosphorus 0.09-0.3; sulfur 0.04-0.6; graphite 1.3-7.2; phosphorus pentoxide 0.3-0.6. Use of metal concentrate makes it possible to save 3.0-5.0 kg of coke breeze per ton of cinter cake. EFFECT: higher efficiency. 2 cl, 1 tbl