Characteristics of Particulate Matter Emissions from the Coking Process

WANG Yan-hui1,2 ZHAO Liang1,2 SUN Wen-qiang1,2 YE Zhu3 CAI Jiu-ju2

(1.Department of Thermal Engineering, Northeastern University, Shenyang, China 110819)
(2.State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, China 110819)
(3.Experimental Center of School of Metallurgy, Northeastern University, Shenyang, China 110819)

【Abstract】To investigate the particulate matter emission characteristics of various emitting sources of the coking process of iron and steel plants, an automatic dust (smoke) tester and an eight-staged Anderson sampler were employed to conduct onsite sampling of particulate matter emissions from the coking process, including coal loading and coke pushing, coke dry quenching exhaust and coke screening and transferring in a steel plant, based on the measurement of particulate matter in the exhaust of fixed sources and sampling of gaseous pollutants. The morphology, particle size distribution, and chemical composition of the particulate matter from different sources were investigated. The results show that the single particles can be divided into five categories: iron-rich, silicon-rich, calcium-rich, carbon, and smoke polymer. They mainly appear in four forms: polygon block, irregular lamellae, lumps, and floc. The particle size of the coal loading and coke pushing unit mainly is 3.3–4.7 μm, while it is 3.3–4.7 μm and 5.8–9.0 μm for the dry quenching exhaust and 4.7–5.8 μm for the coke screening and transferring unit. The main chemical components of particulate matter in the coking process are C, SiO2, Al2O3, S, CaO, and TFe, with contents of 76.30%–81.30%, 5.36%–5.91%, 3.96%–4.26%, 1.15%–1.34%, 0.52%–1.59%, and 0.81%–1.34%, respectively.

【Keywords】 coking process; particulate matter; morphology; particle size distribution; chemical composition;

【DOI】

【Funds】 National Special Fund for Environment Protection Research in the Public Interest (201409023) Fundamental Research Funds for the Central Universities, China (N162504011)

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This Article

ISSN:0250-3301

CN: 11-1895/X

Vol 39, No. 12, Pages 5359-5364

December 2018

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Article Outline

Abstract

  • 1 Material and method
  • 2 Results and discussion
  • 3 Conclusion
  • References