Abstract
It has been a hot issue to investigate the cement production associated with potential effects of its environmental emissions from the perspective of conversion efficiency. This paper aims to analyzethe thermal process containing the energy and resource accounting and conversion process with exergy metrics. The resource exergy conversion efficiency, exergy loss rate, and recycling rate are calculated and compared considering each section of the cement production chain. The results show that the milling stage has the highest conversion efficiency, followed by the clinker calcinations, while those of raw material preparation and pulverized coal preparation are much lower. Due to the temperature differences, the clinker calcination section has the highest exergy loss rate, followed by the waste gas treatment section. The raw material preparation section has a low exergy loss without high temperature stages. The pulverized coal preparation and cement milling sections have the lowest exergy loss. Also, coal power preparation section has the highest recycling ratio, followed by raw material preparation with large amount of sensible heat exergy, while the clinker calcination section has a lower ratio due to coal combustion.
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