APPARATUS FOR THE COMBUSTION OF GAS EXITING FROM A FURNACE, FOR THE PREHEATING OF SCRAPES ENTERING THE FURNACE ITSELF AND RELATED PROCESS

摘要

AN APPARATUS FOR THE COMBUSTION OF GAS EXITING FROM AN ELECTRIC ARC FURNACE (10) FOR THE PREHEATING OF SCRAPS ENTERING THE FURNACE (10) ITSELF FORESEES AN INSERTION DEVICE OF COMBURENT SUBSTANCE INTO A PREHEATING CHAMBER OR LOADING TUNNEL (12) OF THE SCRAP METAL HAVING AN INLET SECTION (21) OF THE SCRAP METAL, A SEAL SECTION TO PREVENT AN UNCONTROLLED ENTRANCE OF AIR IN THE TUNNEL, A HEATING SECTION (24) AND AN UNLOADING SECTION (26) OF THE SCRAP METAL IN THE FURNACE (10). SAID INSERTION DEVICE OF THE COMBURENT SUBSTANCE COMPRISES ONE OR MORE ADJUSTABLE OPENINGS PLACED IN THE LOADING TUNNEL (12) AND CONSISTS OF AT LEAST ONE VARIABLE OPENING SLIT (34) SITUATED IN THE INSERTION ZONE OF THE SCRAP METAL IN THE FURNACE (10) OR UNLOADING SECTION (26) OF THE SCRAP METAL, SUCH OPENING (34) BEING CONNECTED TO A CENTRALISED CONTROL AND DRIVE SYSTEM (38), THE CENTRALISED CONTROL AND DRIVE SYSTEM (38) ACQUIRING A SIGNAL FROM AN O2 OR CO PROBE (40), AND SAID APPARATUS COMPRISES A DEVICE OR A SERIES OF DEVICES OF MECHANICAL SEAL NATURE PLACED IN THE INSERTION OR INLET SECTION (21) OF THE SCRAP METAL IN THE LOADING TUNNEL OR PREHEATING CHAMBER (12).