High-calcium hydrated lime Ca(OH)2 is a dry powder produced by combining quicklime with a sufficient amount of water to satisfy the quicklime's natural affinity for moisture. The process converts CaO to Ca(OH)2.

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Calcium Oxide + Water = Calcium Hydroxide + Heat
{CaO} + {H2O} = {Ca(OH)2}

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Hydrated lime, also known as calcium hydroxide {Ca(OH)2}, is a refined mineral product. Calcium oxide is stoichiometrically reacted with water in a controlled process to form a hydrated lime product that has the consistency of a fine white powder containing less than 1% residual moisture.

 

The amount of water required depends on both the particular characteristics of the quicklime and the type of hydrating equipment available. Hydrated lime easily forms as a suspension or slurry and is often pumped to multiple process locations within industrial plants. 

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Hydrated lime is used in a variety of industrial applications including water treatment, as an anti-stripping agent in asphalt, and in soil stabilization. Some hydrated limes are sold into the food-grade market as well. The product is commonly sold in 50-lb. bags or as a bulk material shipped in pneumatic truck trailers.