FLOTATION KINETICS AND SEPARATION SELECTIVITY OF COAL SIZE FRACTIONS

被引：39

作者：

Li, Yanfeng ^{[1
]}

Zhao, Wenda ^{[1
]}

Gui, Xiahui ^{[1
]}

Zhang, Xiaobo ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Jiangsu, Peoples R China

来源：

PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2013年 / 49卷 / 02期

基金：

中国国家自然科学基金;

关键词：

coal; flotation rate; combustible matter recovery; ash; particle size; PARTICLE-SIZE; BATCH FLOTATION; RATE CONSTANTS; FROTH; PARAMETERS; VARIABLES; RECOVERY; MODELS;

D O I：

10.5277/ppmp130201

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Flotation recovery and kinetics for three size fractions of coal were investigated. Flotation of combustible matter recovery was approximated with the first order kinetic equation while flotation of the ash forming minerals with the second order equation. Next, the equations for each size fraction were combined and a formula was obtained which was used for approximation of the experimental results using the so-called Fuerstenau upgrading curve, which relates the recovery of combustible matter recovery and recovery of ash forming minerals, both in concentrate. The Fuerstenau upgrading plot showed that the best selectivity was obtained for the middle size fraction of 0.25-0.075 mm, while the flotation selectivity of larger 0.5-0.25 mm and smaller -0.075 mm particles was diminished. This finding agrees with many other investigations.

引用

页码：387 / 395

页数：9

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