Quicklime is white or gray lumps, for easy use, massive lime, often need to be processed into lime powder, slaked lime powder or lime paste. Lime powder is composed of massive pulverized quicklime obtained by fine powder, the main ingredient is CaO; lime powder is lump lime with water curing powder obtained, also called slaked lime, its main component is Ca (OH) 2; lime paste is lump lime with more water (about 3 - 4 times the volume of lime) obtained by curing paste. Also called lime slurry. The main ingredient is Ca (OH) 2.
In practical production, the calcination temperature is usually increased to 1000~1100 DEG C for accelerated decomposition. Owing to the large size of limestone raw material or uneven temperature distribution during calcination, lime and lime are often contained in lime. Calcium carbonate in poor lime is not completely decomposed and lacks cohesive force when used. Excessive lime structure is dense, and the surface is often coated with a layer of molten material, which is slow to mature. Because the production of raw materials often contain magnesium carbonate (MgCO3), because this lime also contains minor components of Magnesium Oxide (MgO), according to the number of Magnesium Oxide content, lime into calcium lime (MgO = 5%) and magnesia lime (MgO>5%).
The natural rock, which is mainly composed of calcium carbonate, is calcined at an appropriate temperature to remove carbon dioxide from decomposition. The product obtained with calcium oxide (CaO) as the main component is lime, also known as quicklime.
Calcareous is calcium carbonate minerals.Any natural rock consisting mainly of calcium carbonate, such as limestone, chalk, dolomitic limestone, etc., can be used to produce lime.
