Ore pelletization
AssigneeAllied Colloids Limited
InventorsAnthony P. Allen, Sten Forsmo, John G. Langley
Life of this patent
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Abstract
Finely divided mineral ore is pelletized using a soluble synthetic polymer. Preferably the polymer is in the form of beads made by reverse phase polymerization and all having a size of below 300 .mu.m. When the ore gives a pH in water of below 8 the soluble polymer is preferably cationic.
Claims22
A process in which mineral ore pellets are made by adding binder comprising organic polymer to particulate iron ore having substantially all particles below 250 .mu.m and stirring in the presence of 5 to 15% by weight water (based on total mix) to form a substantially homogeneous moist mixture and pelleting the moist mixture, and in which the binder comprises about 0.002% to about 0.5% by weight, based on total mix, of a water soluble synthetic polymer and that is added to the ore as dry, free flowing beads that are substantially all above 20 .mu.m and below 300 .mu.m and that are made by reverse phase bead polymerisation from a water soluble ethylenically unsaturated monomer or blend of monomers.
A process in which mineral ore pellets are made by adding binder comprising organic polymer to particulate iron ore having substantially all particles below 250 .mu.m and stirring in the presence of 5 to 15% by weight water (based on total mix) to form a substantially homogeneous moist mixture and pelletising the moist mixture, and in which the binder comprises about 0.002% to about 0.5% by weight, based on total mix, of a water soluble synthetic polymer that is cationic and the ore gives a pH in water of below 8.
Dependencies are inferred from the claim text.