METHOD OF PRODUCTION OF METALS FROM ORE MATERIALS AND UNIT FOR REALIZATION OF THIS METHOD Russian patent published in 2006 - IPC C22B5/00 C22B34/12 

FIELD: metallurgy; production of metals in liquid-phase continuous-action units.

SUBSTANCE: proposed method consists in complex extraction of metals possessing affinity for oxygen lesser than aluminum from iron ore concentrates and powder-like metal-containing wastes increasing to 100% processing of solid iron-containing materials and removing molten cast iron from burden. Proposed method includes delivery of loose materials to reaction chamber, introduction of oxygen and reductant, complete conversion of metal and slag into foam emulsion, building-up increased pulsating pressure in reaction chamber within 0.4-3.0 Mpa at considerable deviation of system from thermo-dynamic equilibrium by organization of escape of two-phase medium from reaction chamber to refining settler at critical velocity, separation of metal and gas and discharge of gas through high layer of emulsion at definite velocity. For separation of iron-containing components and components enriched with alloying elements, accompanying flows of oxygen and reductant are fed to reaction chamber through lances located in opposite positions. Ratio of oxygen and reductants fed to reaction chamber and refining settler is calculated on the condition for obtaining content of iron oxide in upper layers of gas-and-slag emulsion within 5-8% of mass of slag. Iron-depleted slag in form of emulsion is fed to forehearth of slag receiver to which carbon-containing reductant at stoichiometric ratio ensuring complete reduction of iron from slag being fed; reduction of all oxides of metals remaining in slag but for silicon and aluminum is performed by alumino-thermal or by combined alumino-silicate-thermal method. In case titanium-containing or any other slag enriched with alloying elements is assigned as final product it is fed from slag receiver directly to granulator. Unit proposed for realization of this method includes spherical reaction chamber with loose material delivery device, device for delivery of accompanying flows of oxygen and gaseous or powder-like reductant, connecting passage, refining settler lance at opposite position relative to connecting passage, first forehearth with tap hole for removal of primary metal and device for delivery of carbon-containing and other loose materials. Mounted in series with refining settler is slag receiver connected with refining settler by means of two passages: lower inclined passage is used for discharge of upper layers of gas-and-slag emulsion to lower part of slag receiver and upper passage is used for discharge of gas through upper part of slag receiver to waste-heat boiler; connected to lower part of slag receiver (depending on kind of final product) are second forehearth with device for delivery of carbo- and metallo-thermal reductants with tap hole for metal and slag and roll-type granulator.

EFFECT: enhanced efficiency; reduction of power requirements.

3 cl, 2 dwg, 1 ex