PELLET OBTAINING METHOD Russian patent published in 2015 - IPC C22B1/24 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, namely to production of iron-ore pellets. Laminated skull is formed at the bottom of a pelletiser; wet charge is supplied to the pelletiser in two flows; the first flow is added to a compressed gas flow in a jet apparatus housing so that a gas moisture charge jet is formed. A zone occupied with charge and a zone free from charge is formed at the pelletiser bottom; nucleation is performed by sputtering of charge onto skull with a gas moisture charge jet in the zone free from charge so that a dense layer of wet charge is obtained. The above dense layer of wet charge is separated into nuclei by means of plate-like knives; skull is cleaned from nuclei by means of a rotary drum with ribs and a cover of pellets is formed by additional pelletising of pellets with charge of the second flow till pellets are obtained. Prior to sputtering, charge skull is shaped by cutting of charge with formation of a cavity allowing to obtain a flat surface of a dense layer. With that, cut charge is formed and compacted beyond boundaries of the dense layer of charge so that an annular briquette is obtained with the height equal to height of the dense charge layer.

EFFECT: invention is aimed at increase of strength of pellets and efficiency.

1 tbl, 3 dwg