How is slaked lime obtained from lime?

Answer 1

Calcium hydroxide, traditionally called slaked lime, hydrated lime, slack lime or pickling lime, is a chemical compound with the chemical formula Ca(OH)2. It is a colourless crystal or white powder, and is obtained when calcium oxide (called lime or quicklime) is mixed, or "slaked" with water. It can also be precipitated by mixing an aqueous solution of calcium chloride and an aqueous solution of sodium hydroxide. The name of the natural, mineral form is portlandite. It is relatively rare mineral, known from some volcanic, plutonic and metamorphic rocks. It has also been known to arise in burning coal dumps. When heated to 512 °C, the partial pressure of water in equilibrium with calcium hydroxide reaches 101 kPa and decomposes into calcium oxide and water.[1] A suspension of fine calcium hydroxide particles in water is called milk of lime. The solution is called lime water and is a medium strength base that reacts violently with acids and attacks many metals in presence of water. It turns milky if carbon dioxide is passed through, due to precipitation of calcium carbonate. Cal (slaked lime). The Aztecs discovered that by soaking their dried corn in wood ash, the corn became easier to grind and also more digestible, thus, more nutritious. The same process is used today to "slake corn". This processed corn is called Nixtamal. It is later ground into fine or coarse meal for tortillas or tamales or used whole for making Posole. Our "cal" comes in a 1 pound cello bag.
its when the lime is slaking in its role at work so it is fired

Answer 2

Quicklime or CaO is slaked by allowing water to react with it. The resulting reaction forms calcium hydroxide, Ca(OH)2 and releases heat. When exactly the right amounts of CaO and water are used, 56 units and 18 units respectively, the result is 'dry hydration', and is a dry light colored powder. If excess water is used, the process is called slaking. In slaking, the result is a slurry, not a dry powder. There are several ways that slaking can be done. Some involve using a calcium hydroxide to water ratio of 3.3 to 1, up to 5 to 1. See link for more on the different processes that can be used.