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An Assessment of Utilization of the Pungchon Limestone in Paper Industry  

Lee, Na-Kyong (Department of Geology, Kangwon National University)
Noh, Jin-Hwan (Department of Geology, Kangwon National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.20, no.4, 2007 , pp. 339-349 More about this Journal
Abstract
For various types of the Pungchon limestone, diverse mineral characters of the limestone including their size and morphology are investigated by using of ELS and SEM to examine the possibility of application as fillers to paper industry. Also, the measurement of zeta potential and the evaluation of coagulation properties in calcite suspension was made for fine powders of the limestone to examine the applicability and efficiency in wet-papermaking process. Fine powder of the Pungchon lime-stone, largely controlled by original mineral characters of ore in mineralogical aspects, exhibits some-what different trend in particle morphology according to ore types, and thereby, the size distribution, zeta potential and coagulation properties also become different. The examined whiteness, brightness, opacity and sheet strength in hand sheet also show remarkable differences according to ore types. These are seemed to be basically due to the results of combined effects of whiteness, site distribution, refractive index, and morphology of the limestone powder on the properties of hand sheet. Considering the investigated results, all types of the Pungchon limestone appear to be sufficiently applicable to paper industry. Especially, the mega-crystalline calcite type is evaluated to be overall suitable for the purpose of paper industry due to the higher values in whiteness and brightness. In addition the fine powder of micro-crystalline calcite type is assessed particularly to have a good quality in sheet strength by virtue of irregular particle shape.
Keywords
Pungchon limestone; fine powder; filler; zeta potential; coagulation property; whiteness; paper industry; morphology;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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