MANUFACTURING METHOD OF GRANULATED SINTERING RAW MATERIAL AND MANUFACTURING METHOD OF SINTERED ORE

• Main Authors: IWASE KAZUHIRO, YAMAMOTO TETSUYA, HIROSAWA TOSHIYUKI, TAKEHARA KENTA, IWAMI TOMOJI
• Format: Patent
• Language: English; Japanese
• Published: 08.11.2018
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To propose a manufacturing method of a granulated sintering raw material capable of enhancing granulation property and having effect on improvement of productivity of a sintered ore, even when a large amount of fine powdered iron ore with a size of -20 μm is blended, and a manufacturing method of a sintered ore using the raw material.SOLUTION: There is provided a method for manufacturing a sintered ore by using a granulated sintering raw material obtained by using a powdered granular iron ore exhibiting "nucleus powder index" of 2.0 or more as a powdered granular iron ore when a sintered blend raw material containing the powdered granular iron ore is granulated to prepare a granulated sintering raw material.SELECTED DRAWING: Figure 6 【課題】−２０μｍという大きさの微粉鉄鉱石を多量に配合した場合であっても、造粒性を向上させることができるとともに、さらに焼結鉱の生産性の向上にも効果のある造粒焼結原料の製造方法と、この原料を用いる焼結鉱の製造方法を提案する。【解決手段】粉粒状鉄鉱石を含む焼結配合原料を造粒して造粒焼結原料とする際に、その粉粒状鉄鉱石として、「核粉指数」が２．０以上を示す粉粒状鉄鉱石を用いて造粒焼結原料を製造し、得られたその造粒焼結原料を用いて焼結鉱を製造する方法。【選択図】図６