بررسي گوگرد زدايي در آلياژهاي نيكل - كروم توليدشده به روش تصفيه الكتريكي توسط سرباره

Investigation of Desulphurization in the Produced Ni-Cr alloys by Electroslag refining methode (ESR)

In this reseach, the desulphurization during production of Ni-Cr alloys at ESR furnace, is investigated. In this process, nickel as an electrode and Cr2O3 as initial raw material are used. The initial slag is made of two components: CaF2 & CaO. After slag melting by nickel electrode, the Cr203 Al mixture tablets are added to the molten slag. The chromium resulted of aluminothermic reduction of Cr203 alloyed with molten nickel. The A1203 resulting of the reduction reaction, make a ternary compositie of Care + CaO + A1203 with initial slag. In this study, the effect of the slag composition and temperature on the desulphurization reaction , is investigated. The results show that with increasin Cr203 content in each test, there is a simultaneous increasing of AI203 in slag composition and slag temperature, resulting to an increasing of desulphurization. The mean elimination percentage of th sulphur was 78%, in this process.