Experimental study on moisture evaporation of lime

Authors: J Y Lee J Y Cheon D Hwang

Publish Date: 2006/04/11

Volume: 50, Issue: 7, Pages: 963-975

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Abstract

A large quantity of byproduct lime wastes with high water content produced from chemicals manufacturing processes has been stacked in an open area in Incheon Korea Highly alkaline leachate and fine dust emanating from the stacked lime wastes caused an environmental concern in the city So evaporative drying and stabilization of the finegrained wastes and use of the on site marine clay as a natural geomembrane liner using drying hardening were considered as a part of a landfill construction plan Treatment of the lime wastes and marine clay was focused on maximizing the evaporative drying and the density Evaporation experiments were conducted in field condition to understand evaporation characteristics and to evaluate actual evaporation rate of the lime wastes and marine clay Local Class A pan evaporation data from a nearby weather station for last 30 years indicated that mean annual and monthly evaporations were 11785 and 982 mm respectively Relative evaporations of the sludge lime cake lime and marine clay compared with the pan evaporation were 1149 619 and 1190 respectively Estimates of annual evaporations from storage surfaces in the field based on the relative evaporation data were 13536 7291 and 14022 mm for the sludge lime cake lime and the marine clay respectively And annual net evaporations considering rainfall effect were estimated as between 8799 and 10829 mm for the lime sludge between 4739 and 5833 mm for the lime cake and between 9815 and 11919 mm for the marine clay It was expected that the actual field evaporation rate would be varied with the moisture contents of the lime and the clay Results of these experiments will provide useful implications for the drying behavior of the byproduct lime and the marine clay and landfill or management plan of the storages

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