| http://www.w3.org/ns/prov#value | - The apparatus of the present invention is particularly useful in carrying out a process wherein calcium carbide is fed through immersion lances into a pig iron desulphurization process whereby the amount of calcium carbide throughflow can be regulated to a desired high value in the range of 40 to 250 kg/min. while maintaining a constant ratio of gas to solid dispensed in the range of 2 to 20 Nl/kg
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