Effect of column height, particle size, and reagent dosages on phosphate rock flotation

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-06-28 DOI:10.1016/j.powtec.2025.121324

Ricardo C. Santana, Carlos H. Ataíde, Marcos A.S. Barrozo

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引用次数: 0

Abstract

The main objective of this study was to analyze the influence of mineral particle size, flotation column height, and collector and depressant dosages on the flotation of apatite in column. For this purpose, five column heights were selected within each particle size range (coarse, intermediate, and fine), for which full factorial designs were performed, considering reagent dosages as variables. Based on the experimental results, a global statistical analysis was conducted to quantify and better visualize the effects of the investigated variables. Regression techniques have been used to obtain prediction equations and determine the conditions required to achieve target levels of phosphorus content and apatite recovery in the concentrate. In general, apatite recovery, unlike phosphorus content, tended to increase with higher collector dosages and with reductions in particle size, column height, and depressant dosage in the pulp. For coarse particles (105–297 μm), shorter columns (h/d = 12.5–25) with high collector dosages (360 g/t) produced the best results. The intermediate fraction (44–105 μm) showed optimal performance with intermediate column heights (h/d = 25–50) and various reagent dosages, achieving P₂O₅ content of 33 % or higher and apatite recovery exceeding 60 %. Fine particles (<44 μm) presented high recovery but low grade due to entrainment, with little sensitivity to column height.

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浮选柱高、粒度及药剂用量对磷矿浮选的影响

研究了矿物粒度、浮选柱高度、捕收剂和抑制剂用量对磷灰石浮选的影响。为此，在每个粒度范围内（粗、中、细）选择5个柱高，考虑试剂剂量为变量，进行全因子设计。在实验结果的基础上，进行了全局统计分析，以量化和更好地可视化所调查变量的影响。利用回归技术得到了预测方程，并确定了达到精矿中磷含量和磷灰石回收率目标水平所需的条件。一般来说，磷灰石回收率与磷含量不同，随着捕收剂用量的增加，以及矿浆中粒径、柱高和抑制剂用量的减少，磷灰石回收率趋于增加。对于粗颗粒（105 ~ 297 μm），短柱（h/d = 12.5 ~ 25）、高捕收剂用量（360 g/t）效果最佳。中间馏分（44-105 μm）在中间柱高（h/d = 25-50）和各种试剂用量下表现出最佳性能，P₂O₅含量达到33%或更高，磷灰石回收率超过60%。细颗粒（<44 μm）受夹带影响，回收率高，品位低，对柱高不敏感；

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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.