In its natural state, calcium carbonate occurs as chalk, limestone and marble. Mississippi Lime ground calcium carbonate is mined from one of the purest limestone deposits in the world with an average purity of 98.5% CaCO3.


Both wet and dry grinding methods are commonly used in processing the limestone for industrial uses. Paper, plastic, paint, rubber and caulk producers use calcium carbonate as a way to improve quality and lower manufacturing costs. Plate glass, bottle and fiberglass producers use larger quantities of calcium carbonate as a source for calcium, an essential ingredient in their manufacturing processes. Calcium carbonate also helps to make many industrial plants more environmentally friendly through its use in waste treatment and flue gas scrubbing systems.


Mississippi Lime’s calcium oxide product families and description are shown below:
  • The CalCarb® Calcium Carbonate family of limestone products is used in applications ranging from glass manufacturing to agriculture.
  • Feed Grade Limestone is produced for the animal feed industry.
  • FGD Limestone is produced and sized for the growing flue gas desulfurization market. See our Reagent Technology Services™ page for more information.
  • PolyCal® AC3 is produced for the Rubber and Plastics Industries where sizing and top cut control is essential.