流化床浮选柱分布器优化的数值模拟

冶金工程 • 矿业工程 • 化学化工

流化床浮选柱分布器优化的数值模拟

何琦，

尹青临，

刘金成，

丁世豪，

曹亦俊，

桂夏辉，

邢耀文

中国有色金属学报

第34卷, 第11期

pp.3856-3875

纸质出版 2024-11-28

DOI：10.11817/j.ysxb.1004.0609.2024-45012

中图分类号：TD952

5400

流化床浮选在粗粒分选领域具有较大的应用前景，通过液固两相流体模拟研究了多环桥联式流体分布器设计参数对流化床浮选柱流体动力学的影响。模拟结果表明：当入口表观水流速度为3 m/s时，流体分布器喷出水流速度主要为0.4~1.2 m/s，局部水流速度可为0 m/s或1.8 m/s；流化床内固相体积分数为26%~32%，中心区域颗粒以0.11~0.21 m/s速度上升运动，近壁区域颗粒呈静止或下降状态，速度均低于0.07 m/s。通过改变开孔数量增大流体分布器开孔率会导致内环喷出水量相对增大、布水非均匀性增大，而通过降低内/外环孔径比、提高开孔不均匀度能够抑制内环出水量，强化布水均匀性，同时降低床层内湍流强度和粗颗粒脱附概率。研究结果为流化床浮选柱的流体分布器设计提供了依据。

浮选粗粒浮选流体模拟流化床浮选柱流体分布器

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