and construction industriesProduction of magnesium is almost exclusively by fused-salt electrolysis of mag- nesium chloride derived from sea-water or brackish water from lakes. Around 22% magnesium is also produced by the ferro-silicon reduction of calcined dolomite (Pidgeon process) or by minor variants of this process.3.1.2 Basic Principles of Pidgeon Process. Calcined dolomite is the most remarkable raw material to use as magnesium source in the Pidgeon process and
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