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D0I:10.13374f.issnl00103x.203.02.016 第35卷第2期 北京科技大学学报 Vol.35 No.2 2013年2月 Journal of University of Science and Technology Beijing Feb.2013 石灰干化污泥作为配料部分替代冶金烧结中熔剂和 燃料 邢奕),洪晨),张坤),赵凡),余广炜,岳昌盛),司艳晓) 1)北京科技大学土木与环境工程学院,北京1000832)首钢总公司环保产业事业部,北京100041 [区通信作者,E-mait:xing.bkd@163.com 摘要利用冶金烧结方法处置石灰干化污泥,探讨了石灰干化污泥作为冶金配料替代燃料和熔剂石灰对烧结性能的 影响.对石灰干化污泥进行热重-差示扫描量热和X射线衍射分析显示,从室温升至1100℃的过程中,污泥中的有机物 分解产生热量,CaCO3和Ca(OH)2转化为CaO.烧结杯实验结果表明:在适宜的配碳量下,石灰干化污泥的加入对烧 结有正向的影响,烧结矿的性能指标均有所改善:当石灰干化污泥替代熔剂和燃料的比例分别为51%和13.3%,配入比 例为3.00%时,烧结的垂烧速度为21.30 mm-min'-1,成品率为72.63%,利用系数为1.458t-m2h-,固体燃耗由每吨 65.54kg降至59.27kg. 关键词废弃物利用;烧结;污泥:石灰:熔剂:燃料 分类号X705 Lime-mediated sewage sludge partly replacing fluxes and fuels as met- allurgy sintering ingredients XING Yi),HONG Chen),ZHANG Kun1),ZHAO Fan)),YU Guang-we),YUE Chang-sheng2), SI Yan-riaol) 1)School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083.China 2)Shougang Environment Protection Industry Department,Beijing 100041:China Corresponding author,E-mail:xing-bkd@163.com ABSTRACT Lime-mediated sewage sludge was used in metallurgy sintering.Its impact on the sinter performance was discussed when partly replacing fuels and fluxes as a metallurgy ingredient.Thermogravimetry-differential thermal analysis (TG-DTA)and X-ray diffraction analysis(XRD)show that in the process of room temperature to 1100 C. organic matter in the sludge decomposes to generate heat,meanwhile CaCOs and Ca(OH)2 turn into CaO.Sintering cup experiment results indicate that the sludge has a positive impact on sintering with appropriate carbon quantities and the sinter quality index is improved.When the sludge ratio is 3.00%and the ratios of replacing the flux and fuel with the sludge are 51%and 13.3%respectively,the vertical burning rate of sintering is 21.30 mm-min-,the yield is 72.63%,the utilization coefficient is 1.458 t.m-2.h,and the fuel consumption per ton falls to 59.27 kg from 65.54 kg. KEY WORDS waste utilization;sintering;sewage sludge;lime;fluxes;fuels 城市污泥是污水处理后的产物,是一种由有机二次污染4.在多种污泥处置方式中,采用石灰干 残片、细菌菌体、无机颗粒和胶体等组成的十分复 化处置污泥的方式可有效降低污泥含水率、杀灭微 杂的非均质体.随着我国城镇污水处理率的提高, 生物和病原菌并有效钝化重金属5-),具有高效、 污泥的产生量迅速增加1-),且污泥中富含大量的 经济和运行费用低的优势,具有改善储存和运输条 有机物、病原徽生物、重金属等,容易对环境造成 件,避免渗滤液泄漏,显著降低含水率等优点7-剂 收稿日期:201207-12 基金项目:国家自然科学基金资助项目(51104009):北京市科技新星计划资助项目(亿111106054511043)DOI: 10. 13374 /j . issn1001 -053x. 2013. 02. 016
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