Enhancement of refining efficiency due to fluid flow control of slag, metal and gas

通过炉渣、金属和气体的流体控制提高精炼效率

• 批准号: 23360330
• 负责人: IGUCHI Manabu
• 金额: $ 11.81万
• 依托单位: Osaka Electro-Communication University (2013)Hokkaido University (2011-2012)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23360330/
• 关键词: 高温材料プロセス; 鉄鋼製錬; ガスインジェクション; スラグ; 気泡; 旋回噴流; 濡れ性; 鉄鋼プロセス; ３相界面; フルード数; 精錬プロセス; 吹き込み噴流; スロッシング; 溶融金属; 可視化; 数値シミュレーション

Molten iron can be produced in the blast furnace due to metallurgical reaction between iron ore and coke. Many kinds of impurities and inclusions however are contained in it. They must be removed by adding refining agents in the bath of reactors such as a converter. This process is called refining. The temperature of the bath is very high and, hence, mechanical agitation using an impeller cannot be applied because of severe erosion of the impeller. Gas injection method based on the gas-lift effect is therefore commonly used to agitate the bath. Enhancement of the refining efficiency is closely associated with control of the dynamic behaviors of bubbles, molten iron, and slag in the bath. Clarification of these behaviors were done on the basis of flow visualization using a high-speed camera and numerical simulation.

由于铁矿石和焦炭之间的冶金反应，可以在高炉中产生铁水。然而其中含有多种杂质和夹杂物。它们必须通过在反应器（例如转炉）的浴中添加精炼剂来去除。这个过程称为精炼。浴的温度非常高，因此由于叶轮的严重腐蚀而不能应用使用叶轮的机械搅拌。因此，通常采用基于气升效应的注气方法来搅拌镀液。精炼效率的提高与熔池中气泡、铁水和炉渣动态行为的控制密切相关。这些行为的澄清是在使用高速摄像机和数值模拟的流动可视化的基础上完成的。

项目成果

Mixing time of a cylindrical bath agitated by gas injection through an off-centered L-shaped top lance

通过偏心 L 形顶喷枪注入气体搅拌圆柱形浴的混合时间

• 发表时间: 2012
• 作者: Norifumi Kochi

非定常ガス吹込みによる円筒容器内旋回現象の振幅の測定

圆柱形容器内非稳态气体注入引起的涡流现象振幅的测量

• 发表时间: 2012
• 作者: 酒井祐介

Cold Model Study of Spout Eye Area in the Presence of the Slag Layer Simulated by Low-Density Particles

低密度颗粒模拟存在渣层时喷口眼区冷模型研究

• 发表时间: 2011
• 作者: Asuka MARUYAMA; Manabu IGUCHI
• 通讯作者: Manabu IGUCHI

急縮小部を有する微小流路内気液二相流の気泡速度に及ぼす流路高さの影響

突缩断面微通道内通道高度对气液两相流气泡速度的影响

• 发表时间: 2013
• 作者: 深澤慧; 熊谷剛彦; 大参達也; 岩井和彦; 井口学
• 通讯作者: 井口学

Mixing time of a cylindrical bath agitated by gas injection through an off-centered L-shaped top lance

通过偏心 L 形顶喷枪注入气体搅拌圆柱形浴的混合时间

• 发表时间: 2012
• 作者: Norifumi Kochi;Manabu Iguchi
• 通讯作者: Manabu Iguchi