2017 №04 (03) DOI of Article
2017 №04 (05)

Electrometallurgy Today 2017 #04
Electrometallurgy today, 2017, #4, 28-36 pages

Refining of iron-carbon melts from copper by the method of sulphurizing

Yu.V. Kostetsky
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kiev, Ukraine. E-mail: office@paton.kiev.ua

Results of experimental investigations on refining the iron-carbon melts from copper by the method of sulphurizing are given. During laboratory studies two variants of sulphide treatment of liquid metal using sulphur and sodium were tested. It was found that the metal refining from copper occurs both in case of sodium filler into a metal, preliminary saturated with sulphur, and also at a combined introducing of sulphur and sodium into mixture composition. For the variant of treatment with sodium introducing into the saturated liquid metal with suphur the effect of specific consumption of this reagent on the degree of metal refining from copper was determined. Technique of the sulphide refining using mixtures of sulphur and sodium was tested in experimental-industrial conditions. Experimental melting with treatment of molten cast iron with such a mixture showed a possibility to decrease the copper concentration in metal from 0.5...1.0 % to values, not exceeding 0.3 %. This technique can be used for the development of the industrial technology of refining the iron-carbon melts from copper. The technological aspects of organizing the process of refining and technological process of steel production from metal scrap, contaminated with copper, were discussed. 33 Ref., 2 Tables, 1 Fig.
Key words: metal scrap; iron-carbon melt; refining; copper; sulphides; sodium
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