Introduction

Calcium carbonate is a common inorganic compound. According to different production methods, calcium carbonate can be divided into heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate and crystalline calcium carbonate. Heavy calcium carbonate is produced by directly crushing natural limestone, calcite, etc. by mechanical methods (milling equipment such as Raymond mill). Light calcium carbonate is prepared by calcining limestone at high temperature, digesting with water, carbonizing carbon dioxide, and finally dehydrating, drying, and pulverizing.