Taken from Whaspe on SI:

The most promising hydrochemical method to process the said low grade ores is using of hydrochloric acid. The advantages of this method over other acids are: preferable capital and operation costs, possibility to produce alumina of higher quality compared with conventional cell grade alumina. The requirement for equipment with higher corrosive resistance can be met with new materials and hardware solutions currently available. UC RUSAL is interested in application of new advanced technologies for alumina extraction from low quality alumina bearing ores located nearby its Siberian smelters. RUSAL is cooperating with Orbite Aluminae in the field of hydrochloric acid process development and implementation in large commercial scale.

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