Linking the SO2 emission of cement plants to the sulfur characteristics of their limestones: A study of 80 NSP cement lines in China

Zhang, Tongsheng, Wu, Chang, Li, Bin, Wang, Jiawei, Ravat, Rasheeda, Chen, Xinzhi, Wei, Jiangxiong and Yu, Qijun (2019). Linking the SO2 emission of cement plants to the sulfur characteristics of their limestones: A study of 80 NSP cement lines in China. Journal of Cleaner Production, 220 , pp. 200-211.

Abstract

In a properly operated new suspension preheater (NSP) cement line, the SO2 emission is mainly originated from sulfides in the raw meal, and limestone, occupying about 85% wt. of the raw meal, is the dominant sulfur source. However, the sulfur characteristics of limestones and then their influences on the SO2 emission have not been clarified yet. In the present study, 80 NSP cement lines with SO2 emission > 200 mg/Nm3 were recorded, the sulfur content and species as well as pyrite morphology of limestones were analyzed and then correlated to their resulting SO2 emission. The results show that the SO2 emission of stack gas increases linearly with the SO3 content of limestone used, and sulfates lead to a 50% reduction in SO2 emission relative to sulfides. Compared with average SO2 emission, euhedral pyrite leads to a slightly higher SO2 emission, whereas metasomatic pyrite results in a lower SO2 emission, which can be attributed to the effects of accompanying elements (Ti, F, K, and Al etc.) on the desulfurization reaction and clinkerization in the whole NSP cement line. The relationships proposed can be used to predict the SO2 emission based on the sulfur characteristics of limestone and to rationally utilize high-sulfur limestone in cement industry.

Publication DOI: https://doi.org/10.1016/j.jclepro.2019.02.133
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Aston Institute of Materials Research (AIMR)
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: Limestone,NSP cement line,Pyrite,SO emission,Sulfur characteristics,Renewable Energy, Sustainability and the Environment,Environmental Science(all),Strategy and Management,Industrial and Manufacturing Engineering
Full Text Link:
Related URLs: https://linking ... 959652619305220 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Online Date: 2019-05-20
Published Date: 2019-05-20
Authors: Zhang, Tongsheng
Wu, Chang
Li, Bin
Wang, Jiawei ( 0000-0001-5690-9107)
Ravat, Rasheeda
Chen, Xinzhi
Wei, Jiangxiong
Yu, Qijun

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Version: Accepted Version

Access Restriction: Restricted to Repository staff only until 15 February 2020.

License: Creative Commons Attribution Non-commercial No Derivatives


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