頁籤選單縮合
題名 | Emission Characteristics and Chemical Compositions of both Filterable and Condensable Fine Particulate from Steel Plants |
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作者姓名(外文) | Yang, Hsi-hsien; Lee, Kuei-ting; Hsieh, Yueh-shu; Luo, Shao-wei; Huang, Ru-jyun; | 書刊名 | Aerosol and Air Quality Research |
卷期 | 15:4 2015.08[民104.08] |
頁次 | 頁1672-1680 |
分類號 | 445.63 |
關鍵詞 | Stationary emission source; Filterable PM₂.₅; Condensable PM₂.₅; Chemical composition; Iron and steel plant; |
語文 | 英文(English) |
英文摘要 | Steel production is an important source of particulate matter emission. In this study, both filterable and condensable fine particulate (PM2.5) emissions from an electric arc furnace (EAF) and four integrated iron and steel plants were measured. Chemical compositions including water soluble ions and metal elements of these two types of PM2.5 were analyzed. The results show that filterable PM2.5 concentrations emitted from sintering, coke making, blast furnace, basic oxygen furnace (BOF) and EAF are 1.01, 0.37, 0.16, 0.15 and 0.28 mg/Nm3 , respectively. Sintering has the highest filterable PM2.5 emission concentrations. Condensable PM2.5 concentrations emitted from the above processes are 65.3, 89.7, 3.84, 1.32 and 2.02 mg/Nm3 , respectively, which are much higher than filterable PM2.5. K, Fe, Pb and Zn concentrations are high in filterable PM2.5 for sintering process, which is attributed to the feedstocks of recycled materials. High sulfur content of the feedstocks results in high concentrations of SO4 2– for all the test plants. In addition to Fe, the emissions of Pb, Zn and Sn are high for EAF, which is due to the complexity of the recycled steel feedstock for EAF. SO4 2– is the highest emission ion for sinter process and coke making. For blast furnace, BOF and EAF, however, Na+ , K+ and Cl– are the predominated ions. For metal elements, concentrations of Na and K are highest for all the plants, which might be caused by their high potential of vaporization. |
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