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

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy and can be used to facilitate technological processes in a blast furnace. Method of blowing a solid reducing agent, a gaseous reducing agent and a combustible gas through a tuyere, employs parallel type lance, made in the form of three separate independent blowing tubes, parallel and bundled in the outer lance tube, one or both of the gaseous reducing agent and the combustible gas being injected simultaneously with the solid reducing agent through corresponding injection tubes, wherein when blowing through the parallel type lance, the injection tube for the solid reducing agent and the injection pipe for the gaseous reducing agent are located above the injection tube for the combustible gas.

EFFECT: invention makes it possible to improve the combustion of coal dust blown through a tuyere, increases cooling efficiency, and also reduces specific consumption of the reducing agent.

3 cl, 11 dwg