EXTRUSION BRIQUETTE FOR BLAST FURNACE PROCESS Russian patent published in 2017 - IPC C22B1/243 

FIELD: metallurgy.

SUBSTANCE: invention refers to ferrous metallurgy, namely, obtainment extrusion briquette for blast furnace process. Extrusion briquette obtained by stiff vacuum extrusion consists of metallurgy scales, carbon-containing material, bentonite and cement, and contains, wt %: FeO < 40; Fe₂O₃ > 20; MgO 0.01-2.5; MnO 0.01-9.0; Cr₂O₃ 0.01-1.5; C 0.1-75.0; S 0.01-0.5; SiO₂ 0.1-15.0; TiO₂ 0.01-0.1; CaO 0.1-7.0; Al₂O₃ 0.01-1.5, impurities < 2, where content of Fe_total comprises 10.0-58.0. Compression strength is at least 5.0 MPa, specific density is at least 2.8 kg/dm³, open porosity comprises at least 10 %, and softening start temperature is at least 1200 °C.

EFFECT: possible obtainment of briquettes with high physical and chemical properties that allow for high performance of cast iron and optimize cast iron production process in a blast furnace due to early formation of carbon oxides and faster reduction of iron from oxides.

2 cl, 1 dwg, 3 tbl, 2 ex