WRITE DIFFERENCE BETWEEN CALCINATION AND ROASTING
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Calcination is the carbonates ores are changed into oxides by heating strongly in limited air.
Roasting :- The sulphide ore are converted into oxides by heating strongly in the presence of excess air.
Calcination is the carbonates ores are changed into oxides by heating strongly in limited air.
Roasting :- The sulphide ore are converted into oxides by heating strongly in the presence of excess air.
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CALCINATION IS THE PROCESS OF HEATING CONCENTRATED ORE IN THE ABSENCE OF AIR AT A TEMPERATURE BELOW ITS MELTING POINT.CARBONATES AND HYDROXIDES OF METALS DECOMPOSE TO FORM OXIDES.
ROASTING IS THE PROCESS OF HEATING CONCENTRATED ORE IN A CURRENT OF AIR AT A TEMPERATURE BELOW ITS MELTING POINT.WHEN THE CONCENTRATED ORE IS SUBJECTED TO ROASTING ,THE MOISTURE PRESENT IN IT IS REMOVED AS VAPOUR.
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