GEE Emissions in Cement Plants and its Control by Technology, Co-processing and the Use of Active Additions
Alexandre Oliveira Lopes1; Blessing Chidinma Ifekaibeya1; Márcio Dimas Ramos1; Rogério José da Silva1
1 UNIFEI
doi:10.20906/CPS/COB-2015-2157
Resumo
Cement plants due to intensive use of fossil fuels in the production process, as well as by calcination of calcium carbonate for the production of clinker, have great generation of CO2. This paper analyzes the conventional process cement production in conventional rotary kilns with grid and satellite coolers. Then presents the technological advances regarding the use of precalciners with tertiary air for combustion, and the towers of cyclone preheaters up to six stages in order to improve fuel and thus reduce greenhouse gas emissions. Moreover, the co-processing of industrial waste allows to reduce the consumption of fossil fuels, while allowing the waste destruction. The use of waste in the steel industry also allows to reduce the clinker percentage in Portland cement, reducing the generation of CO2 per ton of cement produced. Heat balances are presented, composition of materials used and the calculations of gains in reducing emissions. Fuels used in cement kilns were coal and petroleum coke national and imported, used tires and other co-processed industrial waste.
Palavras-chave: Cement Plants; Rotary Kilns; Industrial Wastes; Fuels; CO2 Emissions