燒結場為鋼鐵工業重金屬排放汙染源之一，但燒結場重金屬排放資料大部分為實場重金屬排放資料，然有關燒結製程中其原料改變對重金屬排放特徵與分佈之影響仍有待探討。本研究利用小燒結鍋依實際燒結場之原料比例模擬燒結製程。本研究利用燒結原料（包含粉鐵礦、助熔劑及回收料）的改變，以探討原料、產物(燒結礦)及煙道廢氣內的重金屬成份含量。煙道重金屬採樣參考USEPA METHOD 29之等速煙道採樣方法，並同時收集燒結原料及燒結後之產物樣本。各樣本值利用感應耦合電漿原子發射光譜儀 (ICP-AES)以分析其內含之 As、Hg、Cd、Cr、Cu、Mn、Ni、Pb、Zn等九種金屬。最後藉重金屬排放量及分佈比例以找出粉鐵礦、助熔劑及回收料對重金屬排放之影響。結果發現，六種鐵礦(包括YAN、MAC、MTF、MBR、CVRD、CARA)重金屬含量以Mn所佔含量最高。比較六種鐵礦燒結過程之重金屬排放，亦以Mn元素為之。兩種測試之助熔劑試驗重金屬含量為：Reef (176mg/kg)＞Marble (120mg/kg)。探討兩種助熔劑的重金屬排放時可發現Reef因其CaO含量，致使Reef在燒結時有較低重金屬排放。添加回收料的試驗以添加5% EP dust取代5% YAN鐵礦，結果發現EP dust因其本身的高含量重金屬，導致重金屬排放量的增加。由本次試驗質量平衡結果發現重金屬含量除汞主要存在於煙道廢氣中之外，餘金屬均主要存在於燒結礦中(>70%)；煙道尾氣中，汞主要以煙道氣相存在，但砷（As）、鎘（Cd）、鉻（Cr）、銅（Cu）、錳（Mn）、鎳（Ni）、鉛（Pb）及鋅（Zn）等主要仍以粒狀物型態存在。而Cd、Pb、Zn、As等低熔點元素受到SiO2玻璃化的影響，主要都留在燒結礦中。探討各種燒結測試之原物料組成中不同重金屬之總量與其排放係數之預測模式如下，Cd：y = 0.234x - 3.673 (n=8, R² = 0.697)；Cr：y = 0.129x - 8.127 (n=8, R² = 0.582)；Cu：y = 0.210x - 3.082 (n=8, R² = 0.738)；Mn：y = 0.003 x + 0.460 (n=8, R² = 0.844)；Ni：y = 0.069x - 1.558 (n=8, R² = 0.702)；Pb：y = 1.096x - 49.622 (n=8, R² = 0.979)；Zn：y = 0.052x - 1.493 (n=8, R² = 0.875)；As：y = 0.029 x - 0.152 (n=8, R² = 0.612)；Hg：y = 0.203x + 0.113 (n=8, R² = 0.049)，且其回歸結果間之相關性除了Hg (R2=0.049)以外，其餘重金屬均具良好相關性(R2=0.582-0.979)，意即除了Hg以外，原物料內重金屬含量為主要影響鐵礦燒結後的重金屬排放的主要因素。預測模式推估某鋼鐵廠燒結製程(含四座燒結場)年排放率發現，Pb最高464 ton/year，所有重金屬汙染物之年總排放率可達到851 ton/year。模式推估之燒結製程(含四座燒結場)，經過污染防治設備(EP)校正後，燒結場重金屬排放率仍相當於6.84座燃煤火力發電廠；12.6座燃油火力發電廠。Pb的排放率更是燃煤發電廠的268倍；燃油發電廠的414倍。

Sinter plant is one of the heavy metal pollution sources from the iron and steel industry. Currently the heavy metals emission data of the sinter plant are almost obtained from the real plant emissions, but the relationship between changing raw materials and its effects on heavy metals emission characteristic and their fates are needed to further investigate. In this study, mini sinter pot was applied to simulate the iron ore sintering process. The raw materials (iron ores, fluxes and west returns) blending ratios were specified based on a real plant and was used as a basic to evaluate the heavy metal emissions. An iso-kinetic sampling method of EPA Method 29 for heavy metal from stack flue gases has been used to collect samples. In addition, bulk samples of raw materials and sinters were collected during flue gases samplings. All collected samples were analyzed for their As, Hg, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn contents by ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometer). Finally the metal emissions and distribution proportions were determined and were used to find the effects on heavy metal emission caused by iron ores, fluxes and west returns. Results showed that highest heavy metal content in six iron ores(including YAN, MAC, MTF, MBR, CVRD and CARA) is Mn; all the second highest is Pb. Comparing heavy metal emissions of six different iron ores, the highest one is Pb among all heavy metals might because its lower melting point . Heavy metal contents of two tested fluxes shows Reef (176mg/kg)＞Marble (120mg/kg). The results of heavy metal emissions of the two tested fluxes show Reef had a lower heavy metal emission than Marble. This might because the CaO content containing in the Reef. When waste returns of EP dust was used to replace 5% YAN iron ore, we found that a higher heavy metal emission. That might because high heavy metal content originally containing in the EP dust. Because on our mass balance results, we found that with an exception of Hg exists in the flue gases, all other metals mostly remain in the sinters (>70%). In the flue gases, with the exception of Hg exist in the gas phase, all other metals are mainly preserved in the particle phase. Among them Cd, Pb, Zn and As are the heavy metals with low melting point, their major existence in the sinters may be influenced by SiO2. The predicted model of heavy metals contents containing in raw materials and their corresponding emission factors are as follows, Cd: y = 0.234x - 3.673 (n=8, R² = 0.697); Cr: y = 0.129x - 8.127 (n=8, R² = 0.582); Cu: y = 0.210x - 3.082 (n=8, R² = 0.738); Mn: y = 0.003 x + 0.460 (n=8, R² = 0.844); Ni: y = 0.069x - 1.558 (n=8, R² = 0.702); Pb: y = 1.096x - 49.622 (n=8, R² = 0.979); Zn: y = 0.052x - 1.493 (n=8, R² = 0.875); As: y = 0.029 x - 0.152 (n=8, R² = 0.612); Hg: y = 0.203x + 0.113 (n=8, R² = 0.049)。High correlation (R2=0.582-0.979) were found between eight heavy metals contents containing in raw materials and their corresponding emission factors, with an exception found in Hg (R2=0.049), Above data means heavy metal contents containing in raw materials plays the most important role on heavy metal emissions with an exception of Hg. Precdicting the heavy metals annual emission rate from sinering process(including four sinter plants) found the highest one is Pb 464 ton/year among all heavy metals and total heavy metal annual emission rate is 851 ton/year。Total heavy metal emission from sinering process (including four sinter plants) is 6.84 times higher than coal fired power plant and 12.6 times higher than oil fired power plant. Pb emission from sinering process (including four sinter plants) is 268 times higher than coal fired power plant and 414 times higher than oil fired power plant.

Anderson DR, Fisher R. Sources of dioxins in the United Kingdom: the steel industry and other sources. Chemosphere 46(3): 371-381 (2002).
Azimi S, Rocher V, Muller M, Moilleron R, Thevenot DR. Sources, distribution and variability of hydrocarbons and metals in atmospheric deposition in an urban area (Paris, France). Science of The Total Environment 337: 223-239 (2005).
Audrey M P, David R D. Effects of cadmium on nuclear integrity and DNA repair efficiency in the gill cells of Mytilus edulis L. Aquatic Toxicology 57: 127-137 (2002).
Buekens A, Stieglitz L, Hell K, Huang H, Segers P. Dioxins from thermal and metallurgical processes: recent studies for the iron and steel industry. Chemosphere 42:729-735 (2001).
European Environment Agency (EEA). Emission Inventory Guidebook. B331:1-24 (2000).
Giachetti and L. Sebastiani. Metal accumulation in poplar plant grown with industrial wastes. Chemosphere 64:446–454 (2006).
Gottwald U, Monkhouse P, Wulgaris N, Bonn B. In-situ study of the effect of operating conditions and additives on alkali emissions in fluidised bed combustion. Fuel Processing Technology 75:215-226 (2002).
Grant R. and Grant C. Grant and Hackh’s Chemical Dictionary. McGraw-Hill, New York. (1987).
Hasselriis F, Licata A. Analysis of heavy metal emission data from municipal waste combustion. Journal of Hazardous Materials 47: 77-102 (1996).
Helmers E, Schrems O. Wet deposition of metals to the tropical North and South Atlantic Ocean. Atmos Environ 29:2475–2484 (1995).
International Agency for Research on Center (IARC). IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Humans. Supplement 7 (1987).
International Agency for Research on Center (IARC), IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Humans. (1993).
Ibrahim D, Froberg B, Wolf A, Rusyniak DE. Heavy Metal Poisoning: Clinical Presentations and Pathophysiology. Clin Lab Med 26:67-97 (2006).
Järup L. Hazards of heavy metal contamination. British Medical Bulletin 68:167-182 (2003)
Khosa J, Manuel J, Trudu A. Results from preliminary investigation of particulate emission during sintering of iron ore. Mineral Processing and Extractive Metallurgy 112:25-32 (2003).
Klein, D. H, Andren, A. W, Carter, J. A, Emery, J. F, Feldman, C, Fulkerson, W, Lyon, W. S, Ogle, J. C, Talmi, Y, Van Hook, R. I, Bolton, N. Enuiron. Sci. Technol 9:973 (1975).
Lee Y, Dzuiuban, YC, Lum, MW. Vehicle Handling Design Process Using DOE. International Journal of Vehicle Design 17:40-54. (1996)
Lide D. CRC Handbook of Chemistry and Physics. 75th ED (1995).
Lim M, Ayoko GA, Morawska L, Ristovski ZD, Jayaratne ER, Kokot S. A comparative study of the elemental composition of the exhaust emissions of cars powered by liquefied petroleum gas and unleaded petrol. Atmospheric Environment 40:3111-3122 (2006).
Liu TS, Hsiao IH. The Taguchi Method Applied to Motorcycle Handling. International Journal of Vehicle Design 12:345-356 (1991)
Mathews. AP. “Chemical Equilibrium Analysis of Lead and Berylium Speciation in Hazardous Waste Incinerators”. Proceedings of the Second International Symposium on Metals Speciation, Seperation and Recovery. Vol. II 73-83 (1989)
Nath NK, Mitra K. Optimisation of suction pressure for iron ore sintering by genetic algorithm. Ironmaking and Steelmaking 31:199-206. (2004)
Nicole, A. H. J. Dimphe, P. M.; Katinka, V. D. J.; Hendrik, H.; Gerard, H. Mass Concentration and Elemental Composition of Airborne Particulate Matter at Street and Background Locations. Atmospheric Environment 31:1185-1193 (1997).
Nriagu JO. Global metal pollution. Environment 7:7-33 (1990).
Paasivirta, J. Chemical Ecotoxicology. Lewis Publishers, Inc. (1991).
Passant NR, Peirce M, Rudd HJ, Scott DW, Marlowe I, Watterson JD. UK Particulate and Heavy Metal Emissions from Industrial Processes. AEA Technology. (2002).
Pacyna JM, Nriagu JO, Davidson CI. Toxic Metals in the Atmosphere. Wiley, New York. (1986).
Reddy MS, Basha S, Joshi HV, Jha B. Evaluation of the emission characteristics of trace metals from coal and fuel oil fired power plants and their fate during combustion. Journal of Hazardous Materials B123:242-249 (2005).
Sharma M, Agarwal AK, Bharathi KVL. Characterization of exhaust particulates from diesel engine. Atmospheric Environment 39:3023-3028 (2005).
Singh N, Pandey V, Misra J, Yunus M, Ahmad KJ. Atmospheric Lead Pollution from Vehicular Emissions - Measurements in Plants, Soil, and Milk Samples. Environmental Monitoring & Assessment 45:9-19 (1997).
Sternbeck J, Sjödin A, Andreasson K. Metal emissions from road traffic and the influence of resuspension - results from two tunnel studies. Atmospheric Environment 36: 4735-4744. (2002).
USEPA. National Emission Standards for Hazardous Air Pollutants (NESHAP) for Integrated Iron and Steel Plants - Background Information for Proposed Standards. EPA-453/R-01-005, Office Of Air Quality Planning And Standards Research Triangle Park, NC 27711. (2001).
USEPA, Compilation of air pollution emission factors (AP42), US EPA Office of Air Quality, Vol. I 5th. (1995).
Wey MY, Ou WY, Liu ZS, Tseng HH, Yang WY, Chiang BC. Pollutants in incineration flue gas. Journal of Hazardous Materials B82:247-262 (2001).
Wong SC, Li X, Thornton I. Urban environmental geochemistry of trace metals. Environmental Pollution 142:1-16 (2006).
Wang X, Jin B, Zhong Z. Influence of SiO2 Additive on Heavy Metals Migration during Melting Process from Municipal Solid Waste Incinerator Fly Ashes. Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing. (2006).
Yao H, Naruse I. Control of trace metal emissions by sorbents during sewage sludge combustion. Proceedings of the Combustion Institute 30:3009-3016 (2005).
向傳琦，”鋼鐵冶金學”，中國礦冶工程學會冶金委員會，高雄，1986。