Particle size distribution of re-used carbonation mud
2007
Sarka, E. | Bubnik, Z. | Kadlec, P.,Institute of Chemical Technology, Prague (Czech Republic)
The research work was aimed at particle size distribution measurement of carbonation mud suspension, which was separated in hydrocyclones used in MZ-technology. This low-cost sugar juice purification method is based on re-using carbonation mud and following separation of mud particles. Authors have chosen an image analysis method (system LUCIA) combined with microscopic observation for particle equivalent diameter determination. At first it was necessary to work out original measuring methodology for carbonation mud, it includes choosing suitable object-lenses, design of lightning, preparing suitable subroutine in which values of contrast and threshold are defined, etc. From these size data the particle size distribution was calculated. We detected that the industrial method for the preparation of input mud suspension was not fine enough and an amount of small particles increased in comparison with the unfiltered 1st carbonation juice. Bottom output suspension of hydrocyclones was of worse quality with small particles than the 1st carbonation juice as well. Hydrocyclones did not affect small particles. A normality of size distribution of particles from input and output suspensions in MZ-technology was tested. It can be characterized by normal distribution function for volume fraction xV or by log-normal distribution function for frequency of particles, as to input particles and upper output particles of hydrocyclones. The measured results will be groundwork for next carbonation mud applications
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