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Experimental study on bag filtration enhanced by magnetic aggregation of fine particles from hot metal casting process
Powder Technology ( IF 5.2 ) Pub Date : 2018-03-01 , DOI: 10.1016/j.powtec.2017.12.083
Liang Zhao , Xiaoling Li , Wenqiang Sun , Zhu Ye , Jian Huang , Ge Zhang , Jianghui Pan , Jiuju Cai

Abstract Bag filtration experiments enhanced by pre-aggregation of fine particles from hot metal casting process with size range of 0.3–10 μm in magnetic field were conducted in this work. There is a distinct difference in magnetization process between particles from cast house and coal-fired power plant. The influences of magnetic flux density and gas velocity on particle aggregation and total particle removal efficiency were investigated. The experimental results showed that bigger particles are easily affected by magnetic field and the smaller particles are easily affected by flow field. Although higher magnetic flux density can improve the aggregation of bigger sized particles at a constant gas velocity, combined with the effect of particle size distribution, the total particle number concentration increases as the average gas velocity increases, which would result in the decrease of the total particle removal efficiency. When the total particle mass concentration is 1000 mg/m3, the magnetic flux density is 0.08 T and the gas velocity is 3.0 m/s, the highest total particle removal efficiency reaches 99.77%. When particle magnetization reached saturation, the magnetic flux density will reduce the total particle removal efficiency.

中文翻译:

铁水铸造细颗粒磁团聚增强袋滤的实验研究

摘要 在这项工作中,通过预聚集来自铁水铸造过程中尺寸范围为 0.3-10 μm 的细颗粒增强了袋滤实验。铸造车间和燃煤电厂的颗粒在磁化过程中存在明显差异。研究了磁通密度和气体速度对颗粒聚集和总颗粒去除效率的影响。实验结果表明,较大的颗粒容易受到磁场的影响,较小的颗粒容易受到流场的影响。虽然较高的磁通密度可以改善较大尺寸颗粒在恒定气体速度下的聚集,结合颗粒尺寸分布的影响,总颗粒数浓度随着平均气速的增加而增加,这将导致总颗粒去除效率降低。当总颗粒质量浓度为1000 mg/m3、磁通密度为0.08 T、气速为3.0 m/s时,总颗粒去除效率最高可达99.77%。当颗粒磁化达到饱和时,磁通密度会降低总颗粒去除效率。
更新日期:2018-03-01
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