Possibility of using limestone from “Pješivački do”-Danilovgrad deposit as filler in various industry branches

Abstract

This paper presents results of investigations of the possibility of using “Pješivački Do”-Danilovgradlimestone as filler in various industry branches. Micronization methods, granulometric composition, oil and water absorption and degree of whiteness were investigated, and chemical and thermal analyses (DT/TG) were performed.Physico- chemical properties of this limestone classify it among high quality carbonate raw materials with high CaCO3 content of 98.65%, as well as low MgCO3 content of 0.95% and low silicate content (SiO2 0.23%). Its quality satisfies requirements of standards on using of calcium carbonate as filler in industry of paints and coatings; paper industry; rubber and PVC industry; in production of cattle feed; glass industry; production of mineral fertilizers and sugar industry. Due to the low degree of whiteness (87,6%) Pješivački Do”limestone cannot be used in pharmaceutical and cosmetics industry. Due to relatively high content of Cr (10 ppm) as heavy metal, content of S (0,19%), as well as biogenic elements P2O5 (0.030%), “Pješivački Do” limestone cannot be used in, foundry industry and metallurgy and for neutralization of acidic soils.