The Influence of Fine Size Classification in Mineral Processing Industry
The optimum performance in mineral processing plants usually demands the optimum size reduction, which is frequently achieved by a closed grinding circuit. Due to the difficulty associated with fine size classification, the size separation efficiency in closed grinding circuit is usually very low, which leads to huge circulating load and significant overgrinding. Recent development of Derrick Stack Sizer has made an efficient free size separation down to 200 mesh with a satisfactory screening capacity. With the efficient free size separation with Derrick Stack sizer, the problems commonly associated with typical closed grinding circuit, including high circulating load and overgrinding, have been eliminated.Feedback from numerous Stack Sizer applications in iron ore industry indicated that, compared with conventional fine size classification equipment, the circulating load achieved by Derrick screen was usually decreased from approximate 300% down to 60% or so, while the iron recovery has been increased by 6% to 8% only by more efficient size separation in the closed grinding circuit. To study this phenomenon, this paper discusses the relationship between size classification, circulating load and mineral recovery in the closed grinding circuit. A simulation model to predict the improvement in the grinding circuit from more efficient screening is also introduced with this paper.
Classification Closed grinding circuit Size separation efficiency Circulating load Mineral recovery
H. J. Wu S. H. Yu Y. X. Han H. L. Zhou
Taiyuan Iron and Steel Company, China Derrick Corporation, Buffalo, USA Northeastern University, Shenyang, China Chengdu Sunberry Mining Technology Ltd, Chengdu, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
564-570
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）