distinguish between calcination and roasting
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Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc.
Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. eg: carbon, sulphur etc removed as their gaseous oxides.
hope it helps
Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. eg: carbon, sulphur etc removed as their gaseous oxides.
hope it helps
Answered by
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Hey !!
ROASTING
It is the process of heating the ore below its melting point with excess of air.
Sulphide ore are converted into oxide form.
2Zns + 3O₂ ---(HEAT)--> 2ZnO + 2SO₂↑
Volatile impurities are removed as oxides SO₂ , As₂O₃ etc.
CALCINATION
It is the process of heating the ore below its melting point in the absence or limited supply of air.
Carbonate ores are converted into oxide
ZnCO₃ ---(Heat)--> ZnO + CO₂↑
Water and organic impurities are removed.
Hope it helps you !!
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