(北京工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 北京 100022)
摘 要: 應(yīng)用生命周期評價思想， 結(jié)合物質(zhì)流分析方法， 對我國皮江法煉鎂生產(chǎn)過程中物質(zhì)能量代謝的數(shù)量特征和環(huán)境負荷狀況進行研究。結(jié)果表明： 皮江法煉鎂工藝的資源和能源輸入量較大， 1 t商品鎂錠的資源輸入總量和資源直接輸入量分別為76 t和24 t； 生態(tài)包袱是資源直接輸入量的3.1倍。 CO2和SO2排放情況的時間序列分析表明， 雖然皮江法煉鎂單耗指標不斷降低， 但由于鎂產(chǎn)量增加較快， 導(dǎo)致CO2和SO2直接排放量連年增長，化石燃料的燃燒和精練保護過程是CO2和SO2直接排放的主要責(zé)任者。此外， 由硅鐵生產(chǎn)引起的資源消耗和環(huán)境影響也不容忽視。
關(guān)鍵字: 鎂； 皮江法； 物質(zhì)流分析； 生命周期評價
（School of Materials Science and Engineering,
Beijing University of Technology, Beijing 100022, China）
Abstract: The study aims to reveal the characteristics of material-energy metabolism and environmental impacts for magnesium produced using the Pidgeon process in China. Life cycle assessment combined with materials flow analysis was used for this study. The results show that the total materials input and direct materials input of Chinese magnesium ingots is 76 t/t Mg ingot and 24 t/t Mg ingot, respectively. The quantity of ecological rucksacks reaches 3.1 times of that of direct materials input. The time series analysis shows that the direct emissions of CO2 and SO2 increase with the rapid development of the magnesium industry, although the consumption factor unit decreases with the time passing. The direct emissions of CO2 and SO2 mainly attribute to the consumption of fossil fuels and the protection of molten magnesium. Furthermore, the material consumption and environmental impacts generated by the ferrosilicon production may not be disregarded.
Key words: magnesium; pidgeon process; materials flow analysis; life cycle assessment
