A Comprehensive Analysis of Separation in Floatex Density Separator
Separation performance of a Floatex Density Separator (FDS) has been studied both experimentally and theoretically. Experimental results reveal that at a lower bed pressure the FDS acts like a classifier. Higher bed pressure is required to attain the concentration effect as proper development of suspension density occurs under these conditions. It is seen that the size or density alone is not able to describe the partition fully. The terminal settling velocity, which includes both the size as well as the density of the particle can be a useful descriptor of separation in a FDS. While a narrowly distributed feed offers better performance of a FDS, a wide size distribution of feed results in large scatter in the terminal settling velocity distribution and renders the separation difficult. The closely sized feed enhances the density effect in concentration. A higher teeter water flow rate also helps in carrying larger-lighter particles to the overflow by increasing the cut off terminal settling velocity as it increases the net upward force. A detailed description of separation performance in a Floatex Density Separator has also been established from theoretical considerations. Separation performance of the separator is described using a simple slip velocity model. The model has been validated comparing the predicted FDS performance results with those experimentally measured under widely different operating conditions.
Floatex density separator Mathematical modeling Slip velocity Partition Terminal settling velocity
A. Das S. P. Mehrotra
National Metallurgical Laboratory, Jamshedpur, India
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
754-763
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）