METHOD OF OBTAINING AND USING PARTICULATE CALCIUM CARBONATE

摘要

A method for obtaining particulate calcium carbonate having an average particle size less than about 12 microns is provided. The method includes the steps of (1) withdrawing f rom a pulp mill a mixture containing calcium carbonate; (2) treating the mixture to remove contami nants contained in the mixture to produce a treated mixture containing calcium carbonate and furthe r having a chemical composition and/or purity which substantially inhibits the fusing together of ca lcium carbonate particulates; (3) recovering from the treated mixture particulate calcium carbon ate having an average particle size less than about 12 microns. The calcium carbonate produced has a h igh surface area to volume ratio and is therefore highly reactive and suitable for numerous applicat ions such as in the treatment of soil, filler paper production, paint production, and contaminant co ntainment in coal stack emission assemblies.