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
, 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.[42]
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Heat exchange
Bibliography
General works
National and international magazines
(non-exhaustive list)
Australasian Institute of Mining and Metallurgy (Australia) http://www.ausimm.com
Bulletin de la Société chimique de France (France)
Canadian Metallurgical Quarterly (Canada)
Engineering and Mining Journal (USA)...
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