Ceramic – Glass
Raw materials for Glass Manufacturing:
Solvay’s Process – Lime Calcination :
Limestone is a naturally occurring mineral that can be mined and ground to meet the process requirement. The naturally occurring deposits are originated from calcareous shell and skeletons of biota as well as chemical and bio-chemical precipitation in the sea during geological ages. For best utilisation of the calcination process and to obtain maximum production efficiency it is highly essential that the content of Calcium carbonate in the limestone is very high. A high CaCO3 content ensures that there is very little difficulty in the limestone calcination process. Also one point to note in such limestone is that there will be cost savings in the form of transport as high CaCO3 content means little inert part in limestone and so the transport cost in transferring inert material can be minimized to a considerable extent. A limestone rich in CaCO3 will not only reduce solid matters in the effluent of the distillation unit but will also, for those soda ash plants that have settling, reduce the volume of solids to be treated.
To be Contd….
