SINTERING METHOD OF IRON ORE RAW MATERIAL

• Main Authors: I HIROSHI, EGUCHI SEIZOU, MABUCHI HIDEO, ANO KOUJI, MAEHANA TADAO
• Format: Patent
• Language: English
• Published: 30.05.1984
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PURPOSE:To measure directly the air permeability of a sintering raw material with a relatively simple mechanism and to control the same by detecting the air permeability with a permeability measurement device provided in the negative pressure section on the suction side for hot air of a sintering device and increasing or decreasing the amt. of the water to be added to the sintering raw material. CONSTITUTION:The raw material powder and granules supplied from a raw material hopper 5 to a kneader 6 are kneaded and humidified together with the water supplied through a flowmeter 7 and a water feed valve 8, and the mixture is sent as a sintering raw material A successively into a sintering device. The juncture 13a of a permeability measurement device 13 is connected, via a flow rate control valve 10, a pressure gauge 11, and an airflow meter 12, to a pipeline 9 for measuring gas permeability connected to the proper place of a hot air induction duct 4. A part of the material A is sampled and packed into a packing part 13b of the device 13 which is open at the top surface and has a fine meshed metallic screen 14 in the bottom. The valve 10 is controlled to maintain the specified suction pressure measured with the gauge 11 and thereafter the quantity of the air permeating the inside of the layer packed with the raw material is measured with the meter 12. A permeability index is calculted by a prescribed equation, and the calculated value and an optimum air permeability is compared, according to the difference whereof, the amt. of the water to be added to the device 6 is increased or decreased.