EXTRUSION-TYPE BRIQUETTE (BREKS)-COMPONENT OF CHARGE OF SHAFT FURNACES DIRECT PRODUCTION OF IRON Russian patent published in 2016 - IPC C22B1/243 B28B3/20 B29C47/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, in particular to methods of agglomerating iron ore, and may be used in preparing charge of shaft furnaces for direct iron production. Extrusion briquettes BREKS obtained by hard vacuum extrusion technology from a material mixture comprising a mineral binder, fine wastes shaft furnace direct iron scale rolling mill fines oxidised iron-ore pellets and dust aspiration of electric arc furnaces is used as a component of charge shaft furnaces for direct iron production. Mineral binder is in BREKS is granulated magnesium sulphate heptahydrate MgSO₄7H₂O and, if necessary, bentonite.

EFFECT: invention provides minimum consumption of binder in a briquette, high hot strength and restorative, as well as possibility to use together with other components of charge without swelling and scull formation.

1 cl, 2 ex