| 摘要 |
FIELD: metallurgy industry. ^ SUBSTANCE: invention refers to ferrous metallurgy, and namely to utilisation of iron-bearing waste which can be used as additional raw material blast-furnace and steel-making processes. From industrial waste containing oxidised iron-bearing material there extracted is oxidised iron-bearing material which is mixed with bonding agent with further formation of brickets by vibratory pressing. As industrial waste, there used is iron-ore preparation waste; at that, from it by means of screening there extracted are particles with size of 0.1 to 2 mm and 2 mm to 10 mm. At that, from particles with size of 2 mm to 10 mm there extracted is oxidised iron-bearing material by means of magnetic separation, and iron-ore preparation waste with particle size of 0.1 mm to 2 mm is mixed with water in the ratio of ((6/4):(7/4)) and oxidised iron-bearing material is extracted by hydrodynamic classification; after that, obtained pulp with increased content of oxidised iron-bearing material is dehydrated. ^ EFFECT: invention allows return of iron-ore preparation waste to metallurgic production in the form of raw material with increased content of iron oxides and other useful elements easy reduced in blast-furnace conditions, which ensures economy of lump ore, pellets and in general, provides environmentally safe waste processing method. ^ 3 cl, 1 dwg, 1 tbl |
