Quicklime and slaked lime difference: after the formation of lime stone mortar curing reactive calcium oxide production plants, lime calcium hydroxide colloidal particles form structure, fine particles (particle diameter of about 1μm) of calcium oxide, a large specific surface area (up to 10 ~ 30 m2 / g) of calcium oxide how much a ton, its thick layer of adsorbed water film, can absorb large amounts of water calcium oxide can sell, hence the ability to retain moisture, ie good water retention. Lime powder: calcium carbonate as a main component of white powdery substance. Wide range of applications, the most common is for the construction industry, which is the industrial use of calcium carbonate; the other is food grade calcium carbonate, as a common calcium supplements, is widely used.