EXTRUSION-TYPE BRIQUETTE (BREKS) - COMPONENT OF BLAST-FURNACE CHARGE Russian patent published in 2014 - IPC C22B1/243 B28B3/20 B29C47/02 

FIELD: metallurgy.

SUBSTANCE: invention refers to ferrous metallurgy, and namely to iron-ore raw material agglomeration methods, and can be used at charge preparation for blast-furnace melting. An extrusion-type briquette obtained by means of a stiff vacuum extrusion method and containing a mineral binding agent, an iron-ore concentrate and/or iron ore, carbon-containing materials, and if required, iron- and/or iron-and-carbon containing wastes and fluxing additives, is used as a blast-furnace charge component. Ratio of briquette carbon and iron contents is within 0.05-0.35, mass fraction of iron- and/or iron-and-carbon containing wastes in iron-containing part of briquette charge does not exceed 0.15, fineness of materials, which are included in the charge for obtaining a briquette, does not exceed 5 mm, and briquette weight does not exceed 0.5 kg. As a mineral binding agent, the briquette includes cement, and if required, bentonite.

EFFECT: invention ensures production of agglomerated component of blast-furnace charge of the required chemical composition at minimum flow rate of the binding agent having the sizes that are optimum for blast-furnace charge, high hot strength and reductibility.

5 cl, 5 ex