Externally-heated rotary kilns: A new way to reduce CO2 and SO2 emissions

摘要

CO2 and SO2 emissions from cement plants are serious issues that require mitigation. To this end, this article recommends a new type of externally-heated rotary kiln for cement production. The technology already produces high-activity lime and magnesia powder on a proof-of-concept basis, while also manufacturing high-purity food grade liquid and solid CO2 at low cost. The application of the technology to cement production could have a range of benefits for the sector.