Calcium high-voltage power

Calcium carbide is manufactured today in a dosed furnace12 lined internally with refractory bricks and equipped with three electrodes positioned in a triangular layout, fabricated in situ with coke and lime hues from the processes (Sodeberg electrodes). These electrodes are suspended vertically above the furnace and introduced progressively into the litne/coal mixture, in which they cause partial fusion and mutual reaction. They are continuous, but usually have hollow cores to allow the injection of raw material fines from the feed or dost removal (Knapsack plant). They axe supplied with three-phase an. power at a voltage of 100 to 250 V, with a current density less than 10 A/cm2 of electrode surface area. Due to the reaction s poor energy eflidency, electricity consumption may be as high as 3.3 kWh/kg of carbide. 

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