Ceramic – Glass

Raw materials for Glass Manufacturing:
Solvay’s Process – Lime Calcination :
As discussed in the earlier blog, the lime calcination kiln used in Solvay’s process is different from the other normal kilns used for calcination as this kiln has to consider the production of outlet gases with maximum amount of CO₂ in them. The CO₂ from the CaCO₃ is used for forming the sodium carbonate molecule. This excess CO₂ for the bicarbonate production is derived from the energy source. Also the process does not demand highly pure lime as required by the other lime industries. In Solvay’s process, the limestone is calcined in a temperature range of 950 to 1100^oC in vertical shaft kilns. The retention time of lime in the lime calcination kiln is about 24 to 48 hours. In certain plants the limestone is screened through sieves before kiln loading in order to improve particle size distribution of the raw material. The kiln generally uses solid fuel than fuel in liquid or gaseous form.

To be Contd….

Posted by Saseedaran Kumaran on November 12th, 2009 at 12:52 pm
Filed under: Ceramics, Glass, Soda Ash  |  Leave a comment  |  Trackback