Examples of calcination processes include the following:
decomposition of carbonate minerals, as in the calcination of limestone to drive off carbon dioxide;
decomposition of hydrated minerals, as in calcination of bauxite, to remove crystalline water as water vapor;
decomposition of volatile matter contained in raw petroleum coke;
heat treatment to effect phase transformations, as in conversion of anatase to rutile or devitrification of glass materials
removal of ammonium ions in the synthesis of zeolites
For example, in limestone calcination, a decomposition process, the chemical reaction is
CaCO3 → CaO + CO2(g)
http://en.wikipedia.org/wiki/Calcination
Słownik WNT tłumaczy "calcination" jako prażenie kalcynujące. Wydaje mi się więc, że "roasting" jest ogólniejszym terminem (czyli bezpieczniejszym).
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