METHOD AND DEVICE TO PROCESS OXIDISED ORE MATERIALS CONTAINING IRON, NICKEL AND COBALT Russian patent published in 2012 - IPC C22B23/02 C22B3/04 F27B17/00 

FIELD: metallurgy.

SUBSTANCE: method is carried out in two stages - melting and further reduction of a slag melt, sending the slag melt from the melting stage to the reduction stage is carried out in a direction opposite to motion of gaseous and dusty products, gaseous products of the melting and reduction stage are burnt above the melt of the reduction stage. The amount of oxygen in a wind supplied into the melt at the melting stage makes 0.9-1.2 from the theoretically required one to oxidise fuel carbohydrates to CO₂ and H₂O, amount of oxygen in a wind supplied for afterburning of gases above the slag melt of the melting stage makes 0.9-1.2 from the one theoretically required to oxidise components of effluent gases to CO₂ and H₂O, amount of the oxygen-containing wind supplied into the melt at the melting stage makes 500-1500 m³/m³ of the slag melt, the amount of the oxygen-containing wind supplied to the melt at the reduction stage makes 300-1000 m³/m³ of the slag melt. A furnace by Vanyukov is disclosed, in which a gas flue for joint removal of gases of melting and reducing chambers is installed in the end of the melting chamber dome at the distance of the reducing chamber above tuyeres of the upper row of the melting chamber along the vertical line in gauges of the lower row tuyere relative to the plane of the lower row tuyeres, the melting chamber bottom is arranged by 5-30 gauges below, the horizontal plane of upper row tuyere installation is by 30-80 tuyeres higher, the horizontal plane of lower row tuyeres installation in the reducing chamber is arranged below the upper edge of the vertical partition between the melting and reducing chambers by 40-85 gauges of the reducing chamber tuyeres.

EFFECT: lower mechanical dust carryover and toxic substances exhaust with effluent gases, reduced power and capital expenses, higher reliability, safety and operation life of melting and gas-cleaning equipment.

14 cl, 3 dwg