ABSTRACT
In order to produce the quality of product required for nodular iron castings, the normal sulfur level of grey iron must be reduced. To achieve the reduction, it is desirable to use calcium carbide to destroy or liberate the sulfur from the molten iron. In the desulfurization process, with any calcium carbide source, the aim is to reduce the sulfur content of the iron and have the slag carry away the removed sulfur. The actual sulfur removal is accomplished by converting the sulfur to calcium sulfide. Prior to testing of the proposed procedures for sulfur addition, the program was modified by the introduction of a new modified calcium carbide. In order to use modified calcium carbide for desulfurization of iron the usage rate must be controlled to avoid excesses in the slag or a hazardous waste will be created.
