DEFINITION OF FURNACE RNA FURNACE REFERS TO THE EQUIPMENT THAT CREATES A TEMPERATURE FIELD IN A SPACE SURROUNDED WITH INSULATION AND MAKES AN OBJECT BE SUBJECT TO HEATING, PLASTICITY, HEAT PROCESSING AND DISSOLUTION. BECAUSE THE FURNACE IS OPERATED AT HIGH TEMPERATURE, HIGH-TEMPERATURE EXHAUST GASES ARE EMITTED. RNRNPURPOSE OF HEATING PROCESSRNTHE PURPOSE OF THE HEATING PROCESS IS TO HEAT UP THE BILLETS MANUFACTURED IN THE STEELMAKING PROCESS TO THE DESIRED TEMPERATURE FOR THE ROLLING PROCESS AT 1,100 TO 1,300 °C. CURRENTLY, DAEHANSTEEL UTILIZES LNG AS FUEL. RNRNHEAT TRANSFER WITHIN THE FURNACERNRN1. FLOW AND RESPONSE OF FLUE GASRN2. HEAT TRANSFER AMONG FLUE GAS, FURNACE WALL AND THE OBJECTS HEATED RN3. CHEMICAL AND PHYSICAL CHANGES OF THE OBJECTS HEATED AND HEATING PHENOMENONRN

STRENGTHS AND WEAKNESSES OF CONTINUOUS FURNACE BY TYPERNRNPUSHER TYPE STRENGTHSRN- LESS EXPENSIVE IN INSTALLATION AND MAINTENANCERN- SUBTLE DIFFERENCE IN TEMPERATURE AMONG MATERIALS RNRNPUSHER TYPE WEAKNESSESRN- LIMIT THE SHAPE OF CROSS SECTIONS OF MATERIALS TO A QUADRANGLE.  RN- CAUSE SEVERE SKID MARKS ON THE SURFACE OF MATERIALS RN- LESS EFFICIENT IN HEATING DUE TO STICKING OF MATERIALS  RN- NEEDS CERTAIN TIME TO HEAT UP RNRNRNWALKING BEAM TYPE STRENGTHSRN- NO STICKING OF MATERIALSRN- ABLE TO REMOVE SKID MARKSRN- FURNACE SIZE IS LESS LIMITEDRN  RNWALKING BEAM TYPE WEAKNESSESRN - COMPLEX SYSTEM  RN- EXPENSIVE IN MAINTENANCE