Scholarly record
ECONOMIC ASPECTS OF SYNTHETIC DUCTILE IRON PRODUCTION
Abstract
High demands on casting quality require modernization of technology and innovation of technological equipment. The growth of the cost of input raw materials for casting production forces manufacturers to rationalize production and reduce production costs. In addition to the manufacture of the mold, the metallurgy of liquid metal production is an important indicator of the efficiency of casting production. In terms of production costs, the global trend is towards increasing the share of steel scrap in the batch at the expense of pig iron, which is mainly determined by the price of pig iron in relation to its quality. Of course, when trying to increase the share of steel scrap in the batch, it is always necessary to keep in mind the qualitative level of the obtained melt, which ultimately ensures the required quality of the produced castings. Increasing the proportion of scrap steel in the charge in the production of cast iron is a global trend and is closely related to increasing the economic efficiency of the metallurgical part of foundry production. A suitable carburizer and pre-carburizer (SiC) based on silicon carbide plays a great role here. In addition to economic efficiency, increasing the proportion of scrap steel in charge also plays a major role in the greening of the foundry. The paper summarizes the results of the economic analysis of operational melts during the programmatic change of the batch raw materials used in the production of ductile iron EN-GJS-500-7. The cost of the metal-bearing charge is up to 40% lower if it consists only of steel scrap.
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