Answer:
Chemically speaking, lime refers only to calcium oxide
(CaO); however, in common usage the term includes the calcination products of calcitic and dolomitic limestones. Calcitic (high-calcium) limes are produced by calcination of
calcareous materials (e.g., calcitic limestone, calcite,
oyster shells, and chalk) containing from 95 to 99 percent
calcium carbonate (CaCO^). Dolomitic limes are produced from
dolomitic limestone or dolomite which contains from 30 to ^+0
percent magnesium carbonate (MgCO^), the rest being calcium
carbonate.
At atmospheric pressure, calcite in limestone decomposes
at approximately 900°C to form CaO and COg. The decomposition of dolomite, CaMg is a two-stage process. At
temperatures between 650°C to 750°C dolomite decomposes to
form MgO, CO^ and CaCO^. It is necessary to raise the temperature to 900°C to decompose the CaCO^ (15, 35)» This
phenomenon is extremely important, as is shown later.
Various investigators have studied the effects of stone
size, temperature, and time of calcination of commercial
Explanation:
