Flow field regulation plays an important role in the optimization of column flotation units with agitation function. This paper aims to discuss the regulating effect of baffle design on the flow field in stirred column flotation units by numerical simulation. A series of geometric models of changing baffle structure and layout were established, and detailed flow field simulation analysis was carried out by using COMSOL software. The results show that the internal flow field of the traditional standard cylindrical tank will cause the solid particles to adhere to the wall movement and the bubbles to the middle area, resulting in the uneven distribution of particles and bubbles, and the internal flow field is not conducive to the mineralization process and the stability of the foam layer. This limitation can be significantly improved by introducing baffles. The results show different baffle shapes and layouts are as follows: wide and narrow on top, narrow on the bottom and wide on top, and only arranged at the bottom of the column body, can increase the average turbulent kinetic energy in the collision zone by 22%, 46% and 43%, and the average turbulent dissipation rate by 18%, 43% and 36%, respectively, while maintaining the turbulence intensity in the transport zone. Among them, the baffle plate with wide top and narrow bottom has the best effect. Arranging baffles with a length shorter than 2/3 of the height of the cylinder at the upper part inside the cylinder can also enhance the turbulence intensity in the collision zone, but at the same time, it also increases the turbulence intensity in the transport zone. Moreover, as the length of the baffle decreases, the enhancement effect becomes stronger. Since this method significantly affects the transport zone, it is more suitable for columnar mixing devices. The study also reveals that by adjusting the proportion of wide and narrow baffles, the center of the turbulent region can be laterally shifted to the short baffles, and the flow field distribution can be adjusted. Meanwhile, with the increase in the number of long baffles, the intensity of the flow field in the device will gradually decrease. By moving the center of the turbulent region to the side inlet, the particle dispersion can be accelerated, but in general, the particles will accumulate toward the region with lower turbulence intensity. These findings have important guiding significance for the design and optimization of the flow field of the stirred column flotation unit, which is helpful in improving the agitation uniformity and flotation efficiency.

Tao Wang

Wei Zhou

International Journal of Coal Preparation and Utilization

INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION 发表原创研究论文、简短通讯、评论文章、书评和研讨会公告，涵盖煤炭制备的各个方面。该杂志是所有与煤炭制备相关的人的重要读物，包括运营、工程、管理、教育和科学研究的人员。主题包括：煤炭性质和煤炭岩相学；煤炭质量和特性；煤和矿物的表面化学；粉碎、研磨和释放；煤炭筛选和分级；重介质和密度分离；泡沫浮选和油团聚；过程控制和优化；絮凝增稠；脱水和热干燥；压块和造粒；煤炭处理和储存；煤炭利用和混合；废物处理和污染；公用事业废物利用；和碳基材料。该杂志涵盖的其他主题包括煤/水和煤/油浆的特性，以及通过物理和物理化学方法加工油页岩和油砂。

The International Journal of Coal Preparation and Utilization publishes original research papers, short communications, review articles, book reviews, and conference announcements covering all aspects of coal preparation. This journal is an essential read for all professionals involved in coal preparation, including those in operations, engineering, management, education, and scientific research. Key topics include coal properties and coal petrography, coal quality and characteristics, surface chemistry of coal and minerals, crushing and grinding, coal screening and classification, dense medium and gravity separation, froth flotation and oil agglomeration, process control and optimization, flocculation and thickening, dewatering and thermal drying, briquetting and pelletizing, coal handling and storage, coal utilization and blending, waste treatment and pollution, utility waste utilization, and carbon-based materials. The journal also covers other topics such as the properties of coal/water and coal/oil slurries, as well as the processing of oil shale and oil sands through physical and physicochemical methods.

《International Journal of Coal Preparation and Utilization》发表原创研究论文、简短通讯、评论文章、书评和研讨会公告，涵盖煤炭制备的各个方面。该杂志是所有与煤炭制备相关人员的重要读物，包括运营、工程、管理、教育和科学研究等领域的专业人士。主要主题包括：煤炭性质与煤炭岩相学、煤炭质量与特性、煤和矿物的表面化学、粉碎与研磨、煤炭筛选与分级、重介质与密度分离、泡沫浮选与油团聚、过程控制与优化、絮凝增稠、脱水与热干燥、压块与造粒、煤炭处理与储存、煤炭利用与混合、废物处理与污染、公用事业废物利用以及碳基材料。此外，杂志还涵盖煤/水和煤/油浆的特性，以及通过物理和物理化学方法加工油页岩和油砂等相关主题。

Category	Quartile
工程技术	4
工程技术, 能源与燃料	4
工程技术, 矿业与矿物加工	4

Simulation study on flow field regulation of flotation column with stirring device

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Journal Info

Category	Quartile
MINING & MINERAL PROCESSING	2