IRON-ORE PELLET OBTAINING METHOD Russian patent published in 2015 - IPC C22B1/243 

FIELD: metallurgy.

SUBSTANCE: components of the charge containing a binding agent in the form of a mixture of bentonite and red mud, and an iron-ore concentrate are dosed and mixed. Pelletisation of the prepared charge and firing of raw pellets is performed. First, red mud is dealkalised with a lime mortar till alkali content is less than 1% and charge in the quantity of 1.0-2.5 wt % is added. Pelletisation is performed at charge humidity of 8.0-9.3 wt %. Ratio of red mud and bentonite in the binding agent is maintained within 2.3-11.4.

EFFECT: invention allows reducing the quantity of the binding agent used in the charge at maintenance of high strength properties of the obtained product and prevention of environmental pollution.

4 cl, 3 tbl, 1 ex