Challenging paradigms: The advantages and drawbacks of vertical mills in secondary grinding for iron ore processing

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-02 DOI:10.1016/j.powtec.2025.121089

J. Mesquita , Y. Foucaud , R. Belissont , H. Turrer , M. Badawi

引用次数: 0

Abstract

This study evaluated the performance of ball and vertical mills for secondary grinding of Mont Reed ore (P₈₀ of 53 μm), focusing on energy consumption, particle size distribution, liberation, and subsequent beneficiation impacts. The vertical mill produced finer particles (23 % more mass passing at 15 μm) but also retained more coarse particles (59 % more at 106 μm). Both mill products achieved over 90 % particle liberation, with the vertical mill requiring 60 % less energy to reach the same P₈₀. In the LIMS process, product differences were minimal, with the vertical mill showing 5 % higher Fe recovery due to the presence of coarser iron oxide particles. However, the increased proportion of ultrafine and more rounded particles generated by the vertical mill reduced flotation efficiency, negatively affecting Fe recovery and process selectivity.

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挑战范式：立磨机在铁矿二次磨中的优势与劣势

本研究主要从能耗、粒度分布、解离度和后续选矿影响等方面评价球磨机和立磨机在Mont Reed矿石（P80为53 μm）二次磨中的性能。立式磨机产生的颗粒更细（15 μm时质量通过量增加23%），但保留的粗颗粒也更多（106 μm时多59%）。两种磨机产品都达到了90%以上的颗粒解放率，而立式磨机需要的能量减少60%才能达到相同的P80。在LIMS工艺中，产品差异很小，由于存在较粗的氧化铁颗粒，立式磨机的铁回收率高出5%。然而，立磨产生的超细颗粒和更圆颗粒比例的增加降低了浮选效率，对铁的回收率和工艺选择性产生不利影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.