1. Calcination involves passing the waste through a heated, rotating tube.2. After calcination the flint pebbles were milled to a fine particle size. 3. Usually a high temperature calcination step is required to eliminate organics remnants. 4. The ore was pre-processed by calcination for which special kilns were built. 5. The calcination reaction is the only endothermic reaction in the process and is shown here: 6. The heat necessary for calcination can be provided by oxy-combustion of coal below. 7. The mineral substances of bone may be obtained by calcination , which destroys the organic matter. 8. The advantage of this method is to get crystalline particles or films without postannealing and calcinations . 9. Calcination is an endothermic process and as such requires the application of heat to the calciner.10. The first stage is the calcination of the bauxite at 1200 �C with sodium carbonate and coke. 
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