Most of the iron can be removed through ihleite process.The aluminium sulfate content can reach more than 98% after evaporating, cooling, crystalling and centrifugation.

• 用黄铁矾除去大部分铁，通过蒸发、冷却、结晶、离心脱水，最终可使硫酸铝的含量达98%25以上。