Clinker formation in atmospheres dominated by nitrogen and carbon dioxide

摘要

Converting the kiln to oxygen combustion may improve efficiency and production while capturing carbon dioxide emissions. When changing the dominant gas in the kiln from nitrogen to carbon dioxide, the calcination reaction is delayed to higher temperatures and sintering, as measured by surface area, is significantly increased in the calcination zone. The study showed that raw meal heated in an atmosphere dominated by CO_2 would have similar properties to that processed in a conventional kiln. The degree of sintering and chemical reactions induced by clinker formation at high temperatures prevents re-carbonation during cooling with CO_2.