풍촌층 고품위 석회석의 분체 특성 및 분쇄 효과에 관한 응용광물학적 연구

Abstract

Various types of high-Ca limestone occurred in the Pungchon Formation are examined to understand applied-mineralogical factors controlling their grinding effects and properties. In a fixed grinding system and condition, systematic characterization and determination were carried out for the ore and end products, and the results were correlated and discussed in terms of ore characteristics. These works reveal that crystal size distribution, degree of cleavage development, crystal morphology and texture in the limestone play major roles as controlling factors influenced on the grinding effcets and powder properties. Especially, the calcite cleavage is the most important factor to control the properties and quality of calcite powder. It is also interpreted that the differences in the size and shape of calcite powders partially influenced on the major quality criteria in the usage for filler and extender, i.e., specific surface area, oil absorption, whiteness, refractive index and pH. Thus, special ore characteristics such as higher crystallinity and conspicuous cleavage development are necessary for the high-Ca limestones to be used for filler and extender. Ultimately, careful characterization and assesment in grade and quality for crude ore adequate for a specific usage of high-Ca limestone should be considered as an important process in the powder technology of limestone.