Extraction of potash ore is done through two methods. Conventional underground mining is where ore is dug out by large machines and transported to the surface. This method is expensive, but is also the most common. Solution mining is less common and uses hot brine (salt water solution) injected below the surface onto the ore body and then pumps the potash brine solution back to the surface for cooling and separation on surface ponds.Ore bodies are typically graded by the percentage and tonnage of potassium oxide (K2O) and typically KCl (potassium chloride, or muriate of potassium). Both the more pure potassium form and a water soluable form of potassium, typically potassium chloride (KCl), potassium sulphate (K2SO4 or suplhate of potash, SOP) or potassium carbonate (K2CO3) are listed depending on the source to give investors an indication of the amount of potassium for use in fertilizer.
Potash Vs. Phosphate: What's The Difference?
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