Zhao Liang, Sun Wenqiang, Li Xiaoling, Ye Zhu, Huang Jian, Zhang Ge, Cai Jiuju
State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, Liaoning, 110819, China.
Qingdao Yunlu Energy Technology Co., Ltd, Qingdao, 266109, China.
Environ Monit Assess. 2017 Aug;189(8):368. doi: 10.1007/s10661-017-6053-9. Epub 2017 Jul 3.
In this paper, five particulate emission points from a sinter plant in China, including anthracite crusher, raw material blender, sinter strand, screener, and circular cooler, were selected for particle sampling. The particle size distribution, the toxic element content (As, Cd, Co, Cr, Cu, Ni, Pb, Ti, and Zn), and the morphology of the samples were determined by the gravimetric method, the ICP-OES, and the SEM-EDS, respectively. In addition, the gray relational analysis method was used to evaluate the rank of the particulate emission points in the sinter plant. The results show that the emission factor of PM, PM, and PM of the whole sintering process is 0.121, 0.075, and 0.039 kg/t-sinter, respectively. Furthermore, the total toxic element emission factor is 5282.49 mg/t-sinter. The sinter strand is the most important emitter and contributes 43.8% of PM, 53.3% of PM, 56.4% of PM, and 81.1% of total toxic element in the sinter plant. Nevertheless, particles emitted from the post-sintering process are non-negligible and contribute 48.8% of PM, 41.3% of PM, 38.5% of PM, and 15.5% of total toxic element in the sinter plant.
本文选取了中国某烧结厂的五个颗粒物排放点，包括无烟煤破碎机、原料搅拌机、烧结机、筛分机和环冷机，进行颗粒物采样。分别采用重量法、电感耦合等离子体发射光谱法（ICP - OES）和扫描电子显微镜 - 能谱仪（SEM - EDS）测定了样品的粒度分布、有毒元素含量（砷、镉、钴、铬、铜、镍、铅、钛和锌）以及形态。此外，采用灰色关联分析法对烧结厂颗粒物排放点进行排序。结果表明，整个烧结过程中PM₁₀、PM₂.₅和PM₁的排放因子分别为0.121、0.075和0.039 kg/t - 烧结矿。此外，有毒元素总排放因子为5282.49 mg/t - 烧结矿。烧结机是最重要的排放源，在烧结厂中贡献了43.8%的PM₁₀、53.3%的PM₂.₅、56.4%的PM₁以及81.1%的有毒元素总量。然而，烧结后过程排放的颗粒物也不可忽视，在烧结厂中贡献了48.8%的PM₁₀、41.3%的PM₂.₅、38.5%的PM₁以及15.5%的有毒元素总量。
