Method of producing pellets from ore concentrates

Details Method of producing pellets from ore concentrates Method of producing pellets from ore concentrates

C - Chemistry, Metallurgy

22

B

53/6

C22B 1/243 (2006.01)

Patent

CA 1040433

METHOD OF PRODUCING PELLETS FROM ORE CONCENTRATES A B S T R A C T The present invention relates to ore lumping processes in ferrous metallurgy and can be most efficiently utilized in non-roasting methods of producing pellets from iron ore con- centrates with moisture content of 7 to 15%. The given method of producing pellets provides for prelimi- nary preparation of a mixture from ore concentrate with particle size less than 0.83 mm and binding material in the form of cal- cium oxide and magnesium oxide followed by hydration of this mixture to produce a hydrated mixture, thereafter this hydrated mixture is introduced into ore concentrate to produce a homoge- neous mixture containing 4 to 15 weight percent of binding ma- terial with the following pelletizing of the homogeneous mixture to produce pellets by curing them in the medium of saturated steam at a temperature of 120-225°C during a time period of 1 to 12 hours.

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