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a.烧结前控制。分析烧结过程中二恶英的成因可以发现,氯元素的存在是烧结生产过程中二恶英形成的重要因素之一,因此,采用含氯元素低的原料是减少二恶英排放的有效途径。除尘灰和轧钢氧化铁皮的氯元素含量相对较高,通过改变除尘灰和轧钢氧化铁皮掺用比例,可改变烧结混合原料中氯元素含量;由于烧结原料中铜元素的存在对二恶英的生成有催化作用,选择含铜量低的铁矿石也可以减少二恶英的排放;烧结回用的物料(除尘灰、氧化铁皮、污泥等)杂质含量较
a. Pre-sintering control. Analysis of the causes of dioxins in the sintering process shows that the presence of chlorine is an important factor in the formation of dioxins in the sintering process. Therefore, the use of low chlorine content raw materials is an effective way to reduce dioxin emissions. Dust ash and rolled steel oxide scale is relatively high in chlorine content. The content of chlorine in the mixed raw material can be changed by changing the mixing ratio of dust and rolled scale. Due to the presence of copper in sinter raw material, the formation of dioxins There are catalysis, the choice of low copper content of iron ore can also reduce dioxin emissions; sinter reuse materials (dust, iron oxide scale, sludge, etc.) impurity content than