SYSTEM OF ENERGY OPTIMIZATION FOR PLANT FOR PRODUCTION OF METALS BY DIRECT REDUCTION OF ORE Russian patent published in 2017 - IPC C21B13/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to device (3) for direct reduction of ore, direct-reduced iron in particular. Plant (3) contains reducing reactor (12), device (7, 7a, 7b) for separation of gas mixtures with coupled pressure device (4, 4a, 4b), gas heating device (10) connected upstream of reducing reactor (12). Part of process gas (2, 2a, 2b) is supplied via supply pipeline from one plant (1, 1a, 1b) for melting of cast iron, in particular plant for reduction smelting. Plant (3) is made with possibility of conversion of pressure difference between device (7, 7a, 7b) and reducing reactor (12) into energy suitable for use in injection devices (4, 4a, 4b, 15, 15a, 15b) coupled with device (7, 7a, 7b). Wherein between device (7, 7a, 7b) and gas heating device (10) there is turbine (8, 8a, 8b), in particular, turbine expander.

EFFECT: invention provides rational use of unused pressure difference, preventing loss of recycled gas recovered from plant for production of cast iron and reduced power consumption.

18 cl, 3 dwg