Reactivity and petrography of cokes for ferrosilicon and silicon production

The reactivity of reduction materials is critical in ferrosilicon and silic on production. The reactivity of different cokes has been measured with a m ethod developed by Elkem ASA Research. The purpose of this work was to rela te reactivity to petrographically determined parameters. It is easier and l ess costly to perform a petrographic analysis than to conduct the reactivit y test. The relation between petrographic composition and reactivity has be en established and a model for estimating the reactivity from the petrograp hic analysis was developed. The results of the current work show that petro graphic analysis can be very useful in the selection of coals and cokes for the production of ferrosilicon and silicon. (C) 2000 Elsevier Science B.V. All rights reserved.