METHOD FOR MANUFACTURING TITANIUM OXIDE-CONTAINING SLAG

摘要

THE PRESENT INVENTION PROVIDES A METHOD FOR EFFICIENTLY MANUFACTURING A TITANIUM OXIDE- CONTAINING SLAG FROM A MATERIAL INCLUDING TITANIUM OXIDE AND IRON OXIDE, WHEREIN A REDUCTION OF TITANIUM DIOXIDE IS SUPPRESSED AND THE ELECTRIC POWER CONSUMPTION IS MINIMIZED. THE METHOD INCLUDES THE STEPS OF : HEATING A RAW MATERIAL MIXTURE INCLUDING TITANIUM OXIDE, IRON OXIDE, AND A CARBONACEOUS REDUCTANT, OR THE RAW MATERIAL MIXTURE FURTHER INCLUDING A CALCIUM OXIDE SOURCE, IN A REDUCING FURNACE (6); REDUCING THE IRON OXIDE IN THE MIXTURE TO FORM REDUCED IRON; FEEDING THE RESULTANT MIXTURE TO A HEATING MELTING FURNACE (9); HEATING THE RESULTANT MIXTURE IN THE HEATING MELTING FURNACE (9) TO MELT THE REDUCED IRON AND SEPARATE THE REDUCED IRON FROM A TITANIUM OXIDE-CONTAINING SLAG; AND DISCHARGING AND RECOVERING THE TITANIUM OXIDE-CONTAINING SLAG OUT OF THE FURNACE (9).