Original scientific paper

Ferrosilicon production method using sintered iron silicate - fayalite

D. Grigorova orcid.org/0000-0001-8440-4368 ; University of Chemical Technology and Metallurgy, Sofia, Bulgaria

Abstract

The study aims experimentally investigate how to obtain a ferrosilicon alloy using iron silicate - fayalite generated after flotation enrichment of slag in pyrometallurgical production of copper. This material contains about 46 % iron and about 27 % silicon dioxide. Due to its dispersed structure, fayalite is first sintered. The article describes mathematical and physical modeling of the agglomeration and ore thermal process for the production of ferrosilicon. The main fraction of the obtained agglomerate (57,60 %) is over 15 mm. In the electric arc furnace, the time for refining the agglomerate tap to tap is 40 - 60 minutes. The obtained alloy yield is 46 %. In the three melts, the silicon content in the alloy averaged 44 %, meeting the ferrosilicon standard.

Keywords

ferrosilicon; electric arc furnace (EAF); sintering; Gibbs free energy; iron-silicate – fayalite

Hrčak ID:

281375

URI

https://hrcak.srce.hr/281375

Publication date:

1.1.2023.

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