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(57) Abstract : A method for producing a ferro-alloy, such as steel, in a metallurgical furnace and a reductant feed material for use in the method are disclosed. The method includes using a hydrocarbon polymer as a part of a reductant feed material and selecting a ra - tie of the hydrocarbon polymer addition and the other rednctant addition to optimise operational indicators of the method. The re- ductant feed material includes a (i) a hydrocarbon polymer and (ii) another reductant.