Selective Precipitation of Magnetite in Copper Slag by Controlled Molten Oxidation

فصل «Selective Precipitation of Magnetite in Copper Slag by Controlled Molten Oxidation» از کتاب «Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016» بر «ذوب مس» در حوزه «متالورژی مس» تمرکز دارد. محتوا مبانی علمی، روش‌های فنی و پیامدهای عملی موضوع را به‌صورت منسجم توضیح می‌دهد. برای انتخاب فرایند، طراحی واحد، تحلیل بهره‌برداری و رفع عیب در استخراج و پالایش مس مفید است.

Molten oxidation is a sustainable process for direct precipitation of magnetite from melt copper smelter slag because it involves zero or less energy input due to the exothermic reaction and free reducing carbon addition. During molten oxidation, magnetite precipitation occurred preferentially because of its intensive ferromagnetism and large crystal size, which enables downstream magnetic separation. Previous milligram-scale experiments conducted using an infrared furnace show that magnetite could be precipitated, while precipitation of hematite was limited under an atmosphere of 1 vol% oxygen.