Treatment of iron-containing particles

Abstract

Abstract IRON-CONTAINING PARTICLES SUCH AS FUME IN STEEL FURNACE GASES ARE REMOVED BY EXPOSING THE GAS TO LIME AT SELECTED MHIGH TEMPERATURE AND UNDER CONTROLLED CONDITIONS, E.G. OF CO AND CO2 CONTENT IN THE GAS, SUCH THAT THE PARSULTS, WITH SUBSTANTIAL PENETRATION OF THE LIME PIECES BY IRON OXIDE, AT LEAST IN PART PRODUCING A COMPOUND IDENTIFIED AS DICALCIUM FERRITE. LIMESTONE AND ADVENCING VOLVES CONTINUOUSLY CALCINING LIMESTONE AND ADVANCING THE CALCINED LIME LUMPS THROUGH A REACTION ZONE WHILE THE FUME-LADEN GAS PASSES COUNTERCURRENTLY THROUGH THE SOLIDS, HEAT BEING SUPPLIED FOR THE INCOMING GAS AND FOR THE LIMESTONE CALCINATION AS NEEDED. AN IRON-CONTAINING LIME PRODUCT RESULTS, PREFERABLY IN DISCRETE, NON-CLINKERED PIECES, HAVING GOOD PHYSICAL PROPERTES AND SPECIAL ADVANTAGEOUS OF REACTIVE AVAILABILITY WHEN USED AS LIME FEED IN IRON AND STEELMAKING OPERATIONS, ACCOMPLISHED BY EFFICIENT RECOVERY AND USE OF IRON VALUES.

Inventors

• 👤 A Hodge
• 👤 M Fedock

Bibliographic Details