2011年中国钢铁行业典型有害重金属大气排放清单

根据中国钢铁工业年鉴等统计资料,采用排放因子法,对2011年我国钢铁行业生产活动导致的汞(Hg)、铅(Pb)、镉(Cd)、砷(As)、铬(Cr)、镍(Ni)等6种有害重金属的大气排放及其分布特征进行了研究,并给出了分省区排放清单.结果表明,2011年中国钢铁行业汞、铅、镉、砷、铬、镍大气排放量分别约为18.8, 3745.8, 39.4, 132.2, 241.2, 105.3t;钢铁行业重金属大气排放集中在环渤海经济圈以及长三角地区,其中河北东部及中南部、山东中部等钢铁冶炼企业集中地区重金属大气排放强度较大;钢铁企业内部炼钢工艺对重金属大气排放贡献率较高,其中转炉工序对砷、铅排放贡献率较大,电炉工序对于镉、镍贡献率较大.

Atmospheric emission inventory of typical heavy metals from iron and steel industry in China, 2011

The current status and distribution characteristics of the atmospheric emissions of six heavy metals (Hg, Pb, Cd, As, Cr, Ni) from iron and steel industry in 2011 in China were investigated using a unit-based “bottom-up” method. The national total atmospheric emissions of Hg, Pb, Cd, As, Cr, Ni from iron and steel industry in 2011 were estimated at about 18.8, 3745.8, 39.4, 132.2, 241.2, and 105.3t, respectively. Bohai economic circle is identified as the top emission region where iron and steel smelting plants are densely concentrated. Within the iron and steel enterprises, the steel-making process shows higher emissions of the six heavy metals to air than other production processes: the basic oxygen furnace contributes most of As and Pb emissions, while the electric furnace accounts for most of Cd and Ni emissions.