FIELD: metallurgy.
SUBSTANCE: method of producing metal product at a field of oolitic iron ores includes in-situ leaching of iron by initial dissolving of an oolites shell under conditions of oolites and hydrochloric acid solution mixing in the extraction chamber by means of the organised round rotation of the ore mass and solvent mixture around the well bullet, lifting of the produced productive solution of iron chloride to ground surface through the well, iron transfer from a liquid to solid phase in the form of iron powder. Lifting of the first productive solution of iron chloride through the well is combined with its hydrometallurgical processing using heat transfer and restoration properties of the vertical gas flow by the organisation of air-lift-jet lifting of the iron chloride solution, its evaporation, and iron recovery by heated hydrogen with further issuing of the solid-steam-gaseous mixture on the ground surface for cyclonage with the recovery of the iron powder and steam-gaseous mixture of the regenerated hydrochloric acid and surplus hydrogen. The iron powder is used to receive near the production well of a metal product by powder metallurgy methods. The steam-gaseous mixture is cooled with separation to gas (hydrogen) and liquid (hydrochloric acid), returned to the process at the further production well and extraction chamber. Then the second productive solution is received from peeled oolites in the form of a bulk concentrate of iron and valuable admixtures that by airlift is delivered to the surface for hydrometallurgical processing. The process train to implement the method includes a site of in-situ leaching of iron, a well section of the processed product, and a surface site containing respectively well equipment for solvent supply to the extraction chamber, productive solution issuing, and hydrometallurgical equipment. The end part of the well equipment is made in the form of the bullet containing end, two radial, and two tangential water jet nozzles to generate under pressure solvent jets, ensuring the formation of the extraction chamber, and rotating mixing of a mixture of oolites and solvent, an air-lift-gas jet lifting device ensuring intermediate product lifting and its borehole hydrometallurgical processing. The surface equipment is presented by a separating cyclone, separating cooler, and equipment to produce the metal product by methods of powder metallurgy, including metal moulds to form powder items by cold pressing under the pressure of 30-100 MPa, a furnace of pressed product sintering at a temperature below the temperature of metal melting in a deoxidising atmosphere of hydrogen with the pressed product conversion to a monolith item.
EFFECT: increased efficiency of metal product producing at the field of oolite metal ores.
2 cl, 11 dwg
