BLAST FURNACE OPERATION METHOD Russian patent published in 2018 - IPC C21B7/00 C21B7/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy and can be used when feeding blowing streams of a solid reducing agent, a sustain combustion gas or a gaseous reducing agent into a blast furnace through a tuyere with channels inserted into a nozzle. Method uses a multi-tube channel formed by forming a bundle of multiple blowing tubes, wherein blowing of solid reducing agent or simultaneous blowing of solid reducing agent and sustain combustion gas or solid reducing agent, sustain combustion gas and gaseous reducing agent into the blast furnace is carried out through a blowing tube for a solid reducing agent, a blowing tube for sustain combustion gas and a blowing tube for a gaseous reducing agent disposed in the multi-tube channel, wherein two or more multi-tube channels are inserted into the nozzle to bring their front ends closer to each other and blowing is performed such that the respective blowing streams are mixed with each other in the nozzle.

EFFECT: invention makes it possible to increase the productivity and reduce the specific consumption of the reducing agent material by increasing cooling and combustibility, without increasing the outer diameter of the channel, as well as the design of the channel used in the method.

7 cl, 15 dwg