Effect of High-Phosphorous Iron Ore Distribution in Quasi-Particle on Melt Fluidity and Sinter Bed Permeability
The effect of high P Brockman ore on the melt fluidity was investigated to make clear the mechanism for the deterioration of permeability during sintering. Blending high P ore, characterized by the high porosity and fine size distribution, decreased melt fluidity by the absorption of melt into porous high P Brockman ore. As a result, the pressure drop increased during sintering by the suppression of pore growth and sinter productivity decreased. To improve productivity using high P Brockman ore, JFE has developed an advanced granulation process characterized by segregating high P Brockman ore to the center of quasi-particle, which was coated by dense hematite ore, limestone and coke breeze. It is important to select the suitable coating thickness of dense hematite ore around porous iron ore for preventing from the melt absorption into iron ore. This process controls the excess melting reaction between iron ore and limestone, owing to the segregation of high P ore within the quasi-particles. The commercial plant trials showed that the desirable melt fluidity, resulting from the segregation of high P ore, enhanced the permeability in the sintering bed at Fukuyama No.4 Sinter Plant of JFE Steel. The application of new granulation process remarkably improved both the productivity and reducibility of sinter products, in spite of the recent inferior ore conditions.
quasi-particl granulation productivity sinter strength reducibility
Nobuyuki Oyama Satoshi Machida Takahide Higuchi Hideaki Sato Kanji Takeda
Steel Research Laboratory; JFE Steel Corporation, Fukuyama 721-8510, Japan Steel Research Laboratory; JFE Steel Corporation, Kawasaki 210-0855, Japan
国际会议
The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)
上海
英文
113-119
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）