Understanding Your Market Needs
PCC, a white powder with specific crystalline form and size, is produced by reacting milk of lime with carbon dioxide.
Usually milk of lime is produced by slaking quicklime. The particle size of the slaked lime is a key parameter for the precipitation of calcium carbonate.
An even precipitation process allows good control of the crystallization and particle size of the MOL. Thus lime reactivity is key to achieving the required particle size and shape of PCC, as well as the stability of the process.
The whiteness and brightness of PCC are very critical, especially for office (white) paper manufacturing. Here, the impurities level must be well controlled, especially the iron oxide and manganese oxide.
Other components, like silica or alumina, are considered to be impurities for the final PCC, as they affect the PCC’s properties.
Solutions to Meet Your Needs
Carmeuse provides special high-purity quicklime (different lump sizes) for PCC manufacturers, with consistent and appropriate quality and reactivity.