Prediction of cake solids content in vacuum belt filters from temperature data

T. Kinnarinen*, H. Montonen, M. Huttunen, J. Ahola, T. Lindh, V. Karvonen, A. Häkkinen, Lappeenranta University of Technology (LUT), Finland

The scope of this paper covers continuous dewatering of mineral slurries in a pilot-scale vacuum belt filter, where the solids content of cake is predicted based on temperature measurements. In the experimental study, apatite slurries with different solid contents were filtered at a pressure range of 0.2-0.7 bar. The slurry feed rate and the rotational speed of the belt were varied in order to vary the cake thickness and dewatering time. In addition to temperature measurements with conventional temperature sensors and a manually operated infrared thermometer, thermal imaging of filter cakes was demonstrated by using a thermographic camera. The data collected from the process was then used to predict the solids content of apatite at the point of cake discharge. The measured values of cake solids content varied between 87 and 94 w-%. It was found that...

Session: L12 - Cake Filtration - Enhancement of Continuous Vacuum Filters
Day: 24 October 2019
Time: 09:00 - 10:15 h

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