Calcium Silicon is currently imported to meet the requirements in the country. Several methods are reported in literature for the production of Calcium Silicon. These methods are mainly based on the use of different combinations of the following materials viz (i) Calcium carbide, silica and carbon (ii) calcium oxide, silica and carbon(iii) calcium carbonate, silica, calcium fluoride and calcium chloride (iv) silicon carbide, calcium carbide and quartz (b) calcium oxide and an aluminium silicon alloy. Aravamuthan et al. studied the production of calcium silicon on laboratory scale using a mixutre of Ferro Silicon containing more than 80% silicon and calcium carbonate or oxide and produced calcium silicon having calcium content of 20%, and a silicon content of above 60%, Topilskii et al. showed that ferro silicon calcium containing 12-15% calcium had a number of advantages over silicon calcium when used for standard purposes. Akerkar et al. discussed the methods of production of calcium silicon by the partial carbide method. Vaish, et al. have conducted smelting trials in a 500 KVAsub merged are furnace following quick lime method with the major objective of producing calcium silicon with 25-30% calcium content. Patra, et al. produced calcium silicon with calcium upto 32% by barbothermic reduction and proposed a probable theoretical model of the actual op-eration. Kinnoskuke Okuda conducted a theoretical study on the mechanism of calcium silicon alloy formation. He tried experiements to produce calcium silicon alloy using calcium carbide and proposed models of inner state in the furnace. Calcium Silicon is widely employed in the production of high quality steels. It is also used as desulphuriser forming Cas, a very stable compound. In the form of powder it is used for the reduction of slag. Small addition of Calcium Silicon alters the graphite flakes to almost perfect spheroides with significant improvement in mechanical properties of grey iron castings.
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