Limestone: (Calcite) is a mineral aggregate, mainly composed of calcium carbonate (CaCO3). It is a common substance on Earth, presented in the form of calcite microcrystals, with a complex crystal morphology, often appearing as a deltoid and rhombic shape, light gray or blue-green dense block, granular, nodular, and porous structure. Hardness 3; Density 2.6-2.9; The melting point is 825 ℃; Decompose into calcium oxide and carbon dioxide between 830~1020 ℃; Boiling occurs when encountering dilute acid and dissolves.

The main content of limestone powder produced by our company is CaO>54% Fe203<0.005% MgO<1.5% Al203<0.002% SiO2<0.02%