FIELD: metallurgy.
SUBSTANCE: invention relates to ferrous metallurgy, particularly to production of extrusion briquette for washing hearths of blast furnaces. Extrusion briquette produced by stiff vacuum extrusion consists of scale of metallurgical production, bentonite and cement and contains, wt%: FeO>40; Fe2O3>25; MgO 0.01–2.8; MnO 0.01–1.5; C 0.01–1.5; SiO2 0.1–9.0; CaO 0.1–8.0, Al2O3 0.01–1.2, impurities < 3, content in briquette Fecommon> 60. Wherein compression strength is no less than 5.0 MPa, specific density is no less than 2.8 kg/dm3, open porosity is no less than 10 %, temperature of beginning of softening is no less than 1,200 °C.
EFFECT: briquette has high chemical and physical-mechanical properties and provides qualitative flushing melts hearth of blast furnace to produce iron without deterioration of quality.
1 cl, 1 dwg, 3 tbl, 2 ex
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