对烧结原料中铜、氯元素对二(噁)英排放浓度的影响进行了研究.结果表明,烧结原料中铜、氯元素质量分数明显影响烟气中二(噁)英排放浓度.和基准试验相比,原料中铜质量分数由0.02%提高到0.04%,二(噁)英排放浓度(TEQ)由0.55提高到0.69 ng/m3;原料中氯质量分数由0.04%提高到0.06%,二(噁)英排放浓度(TEQ)由0.55提高到0.82 ng/m3.在烧结原料中添加少量的尿素可以显著降低二(噁)英排放浓度,尿素添加量为0.035%,在上述条件下,二(口恶)英排放浓度均可降低65%以上.
The effects of Cu and Cl elements from raw materials on the emission of PCDD/Fs were carried out in this pa-per. The results show that the contents of Cu and Cl elements affectsignificantly the emission of PCDD/Fsduring the iron ore sintering process. Compared with the based test,when the content of Cu element increased from 0.02%to 0.04%,the concentration of PCDD/Fs was enhanced(TEQ)from 0.55 to 0.69 ng/m3;while the concentration of PCDD/Fs was en-hanced(TEQ)from 0.55 to 0.82 ng/m3 when the content of Cl element increased from 0.04%to 0.06%. It is an effective way to reduce the emission of PCDD/Fs by adding urea in the granules. The emission of PCDD/Fs could drop by 65%when 0.035%urea was added into the granules.
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