METHOD FOR MANUFACTURING SINTERED ORE

• Main Authors: HIGUCHI TAKAHIDE, YAMAMOTO TETSUYA, HIROSAWA TOSHIYUKI, TAKEHARA KENTA, IWAMI TOMOJI
• Format: Patent
• Language: English; Japanese
• Published: 09.07.2020
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a method for manufacturing a sintered ore, capable of preventing the productivity of the sintered ore after sintering from being reduced even when adding a superfine powder raw material to a sintering blending raw material during the granulation of the sintering blending raw material to improve granulation properties.SOLUTION: The method for manufacturing a sintered ore can obtain the sintered ore by granulating a sintering blending raw material including an iron ore consisting of a plurality of brands by a granulator and sintering the obtained granulation raw material for sintering by a sintering machine. When granulating the sintering blending raw material obtained by blending a major amount of a superfine powder raw material having a particle size of 10 μm or less and increasing the superfine powder raw material having a particle size of 10 μm or less in the total amount after the blending by 1-10 mass%, coke breeze is added in the middle of granulating the sintering blending raw material except the coke breeze by the granulator.SELECTED DRAWING: Figure 1 【課題】焼結配合原料の造粒に際し、この焼結配合原料中に超微粉原料を添加して造粒性を改善した場合でも、焼結後における焼結鉱の生産性の低下を防止することができる焼結鉱の製造方法を提案する。【解決手段】複数種類の銘柄からなる鉄鉱石を含む焼結配合原料を造粒機にて造粒し、得られた焼結用造粒原料を焼結機にて焼成することにより焼結鉱を得る焼結鉱の製造方法において、前記焼結配合原料は、粒径１０μｍ以下が過半量である超微粉原料を配合して配合後の総量の内の粒径１０μｍ以下を１〜１０ｍａｓｓ％増加せしめ、その焼結配合原料を造粒するに際しては、粉コークス以外の焼結配合原料を造粒機にて造粒する途中で粉コークスの添加を行う。【選択図】図１