Development of Coating Granulation Process at Commercial Sintering Plant for Improving Productivity and Reducibility
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概要
- 論文の詳細を見る
An advanced granulation process for treatment of raw mixtures was developed to improve sinter productivity and reducibility through fundamental and applied studies. Proper selection of the coating time is the most important factor for achieving improvement, because destruction of quasi-particles proceeds together with granulation in the drum mixer. The advanced granulation process is characterized by coating coke breeze and limestone on the surface of quasi-particles which have been granulated in the primary part of the drum mixer. Coke breeze and limestone are injected from the end of the drum mixer by the belt conveyor at high speed to achieve coating on the quasi-particles. Because these two materials segregate in the quasi-particles, this process controls the excess melting reaction between iron ore and limestone.Fundamental studies and commercial plant trials showed that the desirable melt fluidity resulting from the above-mentioned segregation enhanced permeability in the sintering bed. The superior reducibility of the sinter product depends on the diffusible structure retaining micro pores originating in the relict ores.Commercial sinter plants at JFE Steels West Japan Works with an annual production capacity of 13.5 million tons have already introduced the new granulation process. The new process remarkably improves both the productivity and reducibility of sinter products in spite of the recent prevalence of inferior ores. In addition to improving the sintering operation, this granulation process also contributes significantly to improve blast furnace operation, including both higher productivity and lower reducing agent rate.
- 社団法人 日本鉄鋼協会の論文
- 2005-06-15
著者
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Ariyama Tatsuro
Steel Research Laboratory Jfe Steel Corp.
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Takeda Kanji
Steel Research Laboratory Jfe Steel Corp.
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Oyama Nobuyuki
Steel Research Laboratory Jfe Steel Corp.
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SATO Hideaki
Steel Research Laboratory, JFE Steel Co.
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Jinno Tetsuya
West Japan Works (kurashiki) Jfe Steel Corp.
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MASUMOTO Shinichi
West Japan Works (Kurashiki), JFE Steel Corp.
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FUJII Norifumi
West Japan Works (Fukuyama), JFE Steel Corp.
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Fujii Norifumi
West Japan Works (fukuyama) Jfe Steel Corp.
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Sato Hideaki
Steel Research Laboratory Jfe Steel Corp.
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Masumoto Shinichi
West Japan Works (kurashiki) Jfe Steel Corp.
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Sato Hideaki
Steel Research Laboratory Jfe Steel Co.
関連論文
- Characteristics of Solid Flow and Stress Distribution Including Asymmetric Phenomena in Blast Furnace Analyzed by Discrete Element Method
- Optimization of Physical Parameters of Discrete Element Method for Blast Furnace and Its Application to the Analysis on Solid Motion around Raceway
- Improvement of Reactivity of Carbon Iron Ore Composite with Biomass Char for Blast Furnace
- Reaction Model and Reduction Behavior of Carbon Iron Ore Composite in Blast Furnace
- Granule Design for the Sintering with Less Amount of Liquid Phase Formation
- Thermodynamics of Zirconium Deoxidation Equilibrium in Liquid Iron by EMF Measurements
- Optimization of Coke Breeze Segregation in Sintering Bed under High Pisolite Ore Ratio
- Effect of High-phosphorous Iron Ore Distribution in Quasi-particle on Melt Fluidity and Sinter Bed Permeability during Sintering
- Development of Coating Granulation Process at Commercial Sintering Plant for Improving Productivity and Reducibility
- Influences of Physical Properties of Particle in Discrete Element Method on Descending Phenomena and Stress Distribution in Blast Furnace