title: [Emission characteristics of PM2.5 from blast furnace iron making].
abstract: Electrical low pressure impactor (ELPI) was used to online analyze the PM2.5 particle size and mass concentration distribution in the trapping field and ore tank of blast furnace iron-making plant. Results showed that the grain number concentration of PM2.5 in trapping field after dust removal was in the range of 10(5)-10(6)cm-3 , and the particle size was mainly below 0. 1 μm. While the grain number concentration of the PM2.5 in ore tank after dust removal was in the range of 10(4)-10(5) cm-3, the particle size was mainly below 1.0 μm, and the mass concentration distribution showed a single peak. The micro-morphology of PM2.5 monomer was mainly divided into two categories, spherical particles and irregular aggregates. Chemical composition analysis indicated that the concentrations of water soluble SO(2-)(4) , K+ , Ca2+ were higher than other ions in PM2.5, with the percentage of 10. 32% -28.55% , 10. 36% -12. 15% , 3.97% -15. 4% , respectively. The major elements was Fe, Si, Al, with 16. 8% -31. 62% , 2. 24% -8.76% , 1.24% -5. 89% of total mass, respectively; organic carbon and elementary carbon were 2. 7% -4. 6% and 0. 8% -1. 3% , respectively. The emission factors of PM2.5 in trapping field and in ore tank after dust removal were ranged from 0.045 to 0.085 kg t(-1) and 0.042 to 0.071 kg t-1, respectively.
authors.forename: Zhen-zhen
authors.initials: ZZ
authors.lastname: Fan
authors.forename: Ya-li
authors.initials: YL
authors.lastname: Zhao
authors.forename: Hao-ning
authors.initials: HN
authors.lastname: Zhao
authors.forename: Xing-yin
authors.initials: XY
authors.lastname: Liang
authors.forename: Jing-wen
authors.initials: JW
authors.lastname: Sun
authors.forename: Bao-gui
authors.initials: BG
authors.lastname: Wang
authors.forename: Ya-jun
authors.initials: YJ
authors.lastname: Wang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002244:Carbon / Q000032:analysis; D004391:Dust / Q000032:analysis; D004784:Environmental Monitoring; D019652:Extraction and Processing Industry; D007501:Iron; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D014867:Water
chemical_list: D000393:Air Pollutants; D004391:Dust; D052638:Particulate Matter; D014867:Water; D002244:Carbon; D007501:Iron