Ceramic – Glass
Raw materials for Glass Manufacturing:
Solvay’s Process – Brine Purification :
The alkaline reagent can be lime milk or sodium hydroxide. Usually milk of lime is used as the reagent because this is produced in abundant for ammonia recovery. Process should consider sufficient settling time for letting the precipitation process to happen and let settling process happen in brine settler or in a decanter. So the output of this step is nothing but purified brine and precipitated crystals of Magnesium hydroxide and calcium carbonate and little amount of Gypsum. These solids which are not useful in the process can be treated separately for making them as useful process by-products or also can be let out as process wastes which are disposed of with the other wastes generated during process. Several unsuccessful attempts had been made to remove the calcium carbonate content in the brine purified waste. This is not achievable due to the chloride presence after the effluent treatment and also the effluent treatment process could not fully purify the CaCO3 from process impurities.
To be Contd….
