Recovery of Magnesium Chloride from Resulting Potash Unit Concentrate Case Study: Iran Great Desert Brine

There are several saline waters which contain large amount of Mg2+, such as sea water, natural brine, ore leaching, process stream, geothermal brine, bittern, etc. Typically, magnesium chloride aqueous is rejected during the potash process and disposal of this can comprise significant environmental issues. Thus the aimed extraction of this salt can avail environmentally and economically. In this study, main facets of the recovery process for pilot plant probe were studied in a laboratory scale. The magnesium chloride was extracted from concentrate with help of the chemical precipitation and evaporation-crystallization processes. For more extraction efficiency carnalit water washing and added recycle stream methods were investigated, separately. The recovery yield and magnesium chloride purity was obtained 75% and 98%, respectively