Abstract:The inhibition effects on dioxin emission from iron ore sintering process were compared for two inhibitors through a series of sintering-pot experiments. The additions of the two inhibitors, namely urea and carbohydrazide, in the sintering iron ore mixture were arranged as 0.01%, 0.02%, 0.05% and 0.1% (ω) respectively. The results showed that both inhibitors can reduce dioxin emission significantly. For the case of urea inhibitor, the reduction efficiencies of dioxin emission fluctuated with its addition with the highest efficiency 67.74% appeared at the addition of 0.02%; while for carbohydrazide inhibitor the reduction efficiencies of dioxin emission increased with its addition and the highest efficiency reached 78.79% as 0.1% of carbohydrazide was added. Both inhibitors did not change the finger print of dioxin homologues. The inhibition effect on all dioxin homologues formation by urea was coincident with that by carbohydrazide, namely, the isomer distribution of dioxin emissions were not essentially changed except that OCDD and OCDF behaved different for the two inhibitors. Both inhibitors did not change sintering indexs significantly.
戴帆, 谈琰, 李咸伟, 俞勇梅, 何晓蕾, 陈德珍. 两种抑制剂对铁矿石烧结过程二 减排研究[J]. 中国环境科学, 2012, 32(5): 822-828.
DAI Fan, TAN Yan, LI Xian-Wei, YU Yong-Mei, HE Xiao-Lei, CHEN De-Zhen. Study on dioxin emission inhibition effect by addition of two inhibitors in iron ore sintering process. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(5): 822-828.