| Project/Area Number |
59850108
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
金属精錬・金属化学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
OMORI Yasuo Research Institute of Mineral Dressing and Metallurgy Tohoku University, 選鉱製錬研究所, 教授 (20006026)
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| Co-Investigator(Kenkyū-buntansha) |
NAITO Humio R & D Laboratories-III Central R & D Bureau Tohoku University, 釜石製鉄所製銑技術, 室長
HIDA Yukihiro R & D Laboratories-III Central R & D Bureau Tohoku University, 第3技術研究所日吉分室, 課長研究員
SASAKI Minoru R & D Laboratories-III Central R & D Bureau Nippon Steel Corporation, 第3技術研究所日吉分室, 副部長
KASAI Eiki Research Institute of Mineral Dressing and Metallurgy Tohoku University, 選鉱製錬研究所, 教授 (50134044)
YAGI Jun-Ichiro Research Institute of Mineral Dressing and Metallurgy Tohoku University, 選鉱製錬研究所, 教授 (20006050)
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 1986: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1985: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1984: ¥6,800,000 (Direct Cost: ¥6,800,000)
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| Keywords | sintering / iron ore assimilation / combustion / coke / quasi-granule / existing state Pressure drop / oed structure / mathematical model / ミニペレット / 一酸化窒素 / 鉄鉱石 / 数学モデル / 焼結プロセス / 窒素酸化物 / 【NO_X】 / 【SO_X】 / 焼結シミュレーター / 賦存状態 / 石灰石 / アルミナ / ヘマタイト / 微粉 / 燃焼速度 / 硫酸カルシウム / 焼結 / シミュレータ / 品質 / 層構造変化 / コークス燃焼 / 充填層 |
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| Research Abstract |
Iron ore sinter occupy a principal portion and higher than 70% of overall iron burden used in a blast farnace, it has been windely recognized that the quality of sinter governs stable operation and energy consumption rate of blast furnace. An advanced technology of sintering process which may cope with an increase in the ratio of fine ores and diversification of feed ore sources is urgently required to develop taking consideration of worldwide ore resoures in future. Under such industrial requirement, the present research group has developed and constructed a sintering simulator system based on the results obtained by a proto-type one. The simulator consists of gas flow and its controle unit, sintering bed rector, and data acquisition and processing unit. The system is functioned by fully automatic operation. The sintering bed reactor, such as auxiliary pre-heating unit for gas and solid, sensor units which collect the data of temperature, pressure drop and gas composition through enti
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re course of sintering. As a feature of the system, it equips an unit for rapid cooling of the sintering bed by helium gas in order to inspect the structual and mineralogical change of sample bed in the course of sintering.
By using the simulator, the following results were obtained; 1) Mathematical model is described relevant to transport phenomena occured at coke combustion and assimilation zones of sintering process. 2) Quasi-granulation technology proposed by the present investigators, namely "duplex mini-pellets granulation method" leads to obtain high quality sinter for blast furnace burden. 3) Relation between combustion rate of coke with various existing states and conversion ratio of nitrogen oxide generated from nitrogen in coke is clarified quantitatively. 4) Stractural and minerarogical changes occured in the course of sintering were investigated by using EPMA, image analyser, DTA and TG and so on. Then design of duplex mini-pellet was proposed to meet to the sinter quality for blast furnace.
This sintering simulator proved to be applied as a substantial apparatus for grasping various phenomena which occur in high temperature zone of sintering process. Less
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