DIRECT IRON RECOVERY METHOD, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2012 - IPC C21B13/02 

FIELD: metallurgy.

SUBSTANCE: invention refers to direct recovery of iron oxide particles so that the iron recovered with direct method (IRDM) can be obtained. Recovery is performed in recovery reactor having recovery zone and cooling zone, loop of repetitive cycle of recovering gas, which includes recovery zone, and loop of repetitive cycle of cooling gas, which includes cooling zone. Particles containing iron oxide enter recovery zone, where they are recovered to IRDM, which contains metallic iron; hot IRDM is supplied to cooling zone through which cooling gas for IRDM cooling circulates in loop of repetitive cycle of cooling gas, and at least some part of cooling gas is removed from cooling zone, cooled and cleaned, and mixed with flow of fresh gas compatible with direct recovery method, and recirculated in loop of repetitive cycle of cooling gas back to cooling zone. Cooled IRDM is unloaded from cooling zone. Recirculation of cooling gas to loop of repetitive cycle of cooling gas is performed at least with one ejector brought into action with high-pressure fresh gas flow as motive force of the above ejector.

EFFECT: use of ejector for recirculation of cooling gas provides considerable economy of electricity and capital and operating costs and maintenance costs.

19 cl, 4 dwg, 1 ex