1 Joyce Ober, Strontium, from Mineral Commodity Summaries ...
Although the soda ash method is a simpler process, the lower grade product causes it to be the less preferred method of recovery. The black ash method is used by CPC. 2. Generalized Process Flow Diagram Strontium Carbonate Process Soda Ash Process Finely powdered celestite is mixed with soda ash and treated with steam for one to three hours.