In the selection of raw materials or the use of lime Lime sewage treatment factories in many grade limestone (CaCO3 calcium carbonate), often with CaO (calcium oxide) content greater than 54%, SiO2 (silicon dioxide), S (sulfur), P (phosphorus), MgO (magnesium oxide) high-quality wastewater treatment lime, Fe2O3 (iron oxide), Al2O3 (aluminum oxide) and other impurities in the low active lime calcination of limestone as a raw material. Physical and chemical properties of the primary guarantee because it is to achieve active lime product should have, and this is very important. Lime applications: lime is a natural rock containing calcium carbonate will be based, at a high temperature calcination, whose main component is calcium oxide (CaO). Upon calcination temperature control due to the heat or uneven wastewater treatment lime, lime often contain undercooked or burned lime. Less fire lime pulp producing a small amount of wastewater treatment lime quote, poor quality, lower utilization, will not bring harm.