铁矿石烧结过程二恶英排放的影响因素研究  

Factors accelerating dioxin emission from iron ore sintering machines

作　　者：Nakano Masanori Kawachi Shinji Morii Kazuyuki Sato Takehiko 齐伟（译） 俞勇梅（校） 

机构地区：[1]新日铁,日本东京1008071 [2]北海制铁公司,日本室兰0508550 [3]不详

出　　处：《世界钢铁》2012年第2期1-5,共5页World Iron & Steel

摘　　要：通过采用2水平7因素正交试验设计（L8（2^7））的烧结锅试验,研究了影响烧结机二恶英排放的相关因素。EP灰、BF灰和外购氧化铁皮是二恶英排放的主要＂促进剂＂,而生石灰是二恶英排放的＂抑制剂＂。对各影响因素而言,二恶英的排放模型并不是加和模型而是乘积模型,对应于添加5%EP灰、5%BF灰、5%外购氧化铁皮和2%生石灰时,它们的系数分别为28、4、4和0.7。至于操作条件,包括料层高度、焦粉含量、气体流速和废气补燃器的开/关对二恶英排放没有显著影响。这些事实支持了烧结过程二恶英的合成为化学反应控制。Causal factors for dioxin（D）emission from iron ore sintering machines has been investigated by means of pot tests designed with the two-level seven-factor orthogonal array（L_8（2~7））.EP dust,BF dust and purchased scale were major D-accelerators;quick lime was a D-suppressor.D emission was not a sum but a product event of those factors,and their coefficients were 28,4,4 and 0.7 times for 5%EP dust,5% BF dust,5% purchased scale and 2% quick lime additions,respectively.As for operational conditions,bed height,coke content,gas velocity and after burning had insignificant effects.These facts supported that the D synthesis during sintering was chemical-reaction-controlled.

关 键 词：铁矿石烧结 二恶英 正交阵列 

分 类 号：TF046.4[冶金工程—冶金物理化学]