APPARATUS FOR PRODUCING REDUCED IRON AND METHOD FOR DRYING PELLET APPLIED TO THE APPARATUS

• Main Authors: FUJIOKA HIRONORI, KAMIKAWA SUSUMU, HIRATA KOICHI, SATO KEIICHI, MIZUSHIRO HIDEAKI
• Format: Patent
• Language: English
• Published: 27.03.2001
• Edition: 7
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a reduced iron producing apparatus, in which the good efficient and stable drying in a dryer can be executed and the good quality reduced iron can stably be produced, and a pellet drying method applied to the apparatus. SOLUTION: This reduced iron producing apparatus is provided with a pellet granulating machine 6 for granulating the pellet by mixing coal as a reducing agent and iron ore of an iron oxide, the dryer 7 for drying the granulated pellet, a round-shaped rotary hearth type reduction furnace 1 for reducing the dried pellet in the high temperature atmosphere, a first heat exchanger 9 for heat-exchanging exhaust heat gas discharged from the reduction furnace 1 and the air for combustion supplied into the reduction furnace 1 and coolers 8, 10 for cooling the exhaust heat gas. A second heat exchanger 20 for heating the air for drying at the outlet side of the first heat exchanger 9 is disposed and the air for drying, heated with the second heat exchanger 20 is supplied into the dryer 7 to dry the pellet with the air for drying having little moisture.