Heat exchange
Extractive metallurgy - Pyrometallurgy
Article REF: M2231 V1
Heat exchange
Extractive metallurgy - Pyrometallurgy

Authors : Pierre BLAZY, El-Aid JDID

Publication date: March 10, 1998 | Lire en français

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4. Heat exchange

Heat exchanges are very important and depend fundamentally on the endothermicity or exothermicity of the reactions. Recent techniques, such as oxygen injection, the use of thermal plasmas or induction furnaces, improve conventional heat balances.

4.1 Exothermic and endothermic reactions

  • Exothermic reactions include the combustion of coke, gas or fuel oil, sulfide roasting reactions and metallothermic reactions. In some furnaces, such as sintering grates [42] , attempts are made to reduce fuel consumption by recovering hot gases for recycling. In fluidized-bed or suspension roasting furnaces, the excess heat available is recovered in an auxiliary boiler.

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