NL Industries, Inc., at its Rowley, Utah, plant, uses solar evaporation to concentrate magnesium chloride from the brine from Great Salt Lake, followed by spray drying to recover solid salt, as shown in Fig. 3. Three solar evaporation ponds cover about 16,200 hectares, and 4.54 million tonnes per year of waste mixed salts are flushed back into Great Salt Lake. Excess chlorine over that required in the chlorinator shown in the flowsheet is sold as a byproduct. CELL FEED FOR ALUMINUM PRODUCTION Bauxite is the almost universally used raw material for aluminum production. It is a product of the weathering of aluminum silicate minerals, and principal deposits are found in a globe-circling belt near the equator, as shown in Fig. 4.
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