水泥窑协同处置生活垃圾焚烧飞灰过程中Pb和Zn的迁移转化特性

对某水泥窑协同处置生活垃圾焚烧飞灰系统进行采样分析,研究飞灰中的Pb、Zn在水洗脱氯预处理及水泥窑协同处置过程中的迁移转化特性。结果表明,水洗预处理过程中,飞灰中0.15%Pb和0.015%Zn进入结晶盐,94.05%的Pb和93.17%的Zn留存在水洗灰中,且赋存形态基本不变。水泥窑协同处置飞灰过程中,进入窑内的Pb和Zn少部分在窑内和预热器系统形成内循环,93.84%Pb和81.38%的Zn进入水泥熟料,0.002 7%的Pb进入窑尾烟气,0.001 4%的Pb和0.001 1%的Zn进入窑灰。热力学平衡计算表明,水泥熟料中Pb的主要存在形态是PbO、PbSiO₃,Zn的主要存在形态是ZnO、ZnFe₂O₄、ZnAl₂O₄。窑尾烟气排放指标和水泥熟料性能指标均满足相关规范要求,这说明Pb和Zn在水泥窑中实现了良好的固化,环境风险可接受。本研究结果可为水泥窑协同处置飞灰工艺系统设计优化提供参考。     

生命周期评价在水泥企业清洁生产审核中的应用

利用生命周期评价工具对企业的生产过程进行全面分析与评价，做好企业清洁生产的审核工作具有重要理论研究价值和现实应用意义。运用生命周期评价方法对重庆小南海水泥厂普通硅酸盐水泥生产过程进行了初步评价，认识了普通硅酸盐水泥生产过程的环境协调性，为普通硅酸盐水泥进一步提高环境性能提供了理论依据。     

无证叉车工、装卸工共同作业导致事故后责任认定之探讨

案情：2007年6月11日下午5时左右,某建材有限公司服务队队长安排装卸工王某和叉车工华某（经查未持特种设备作业人员操作证）到一车间装7根小10米的水泥电杆上半挂卡车,驳载到外运卡车上。由于车间部分封头合格的电杆在未封头的电杆下面,王某与华某实际装杆23根。作业时,叉车工华某用叉车一次铲装3～4根水泥电杆装卸到车箱内,     

工作时间从事非本职工作受伤能否算工伤？

案情概要 李某是甲公司员工,其工作岗位是在拉网机上测量网片。2007年2月9日,李某上夜班,晚上12时许,班长王某因故临时离开生产线,李某操作整平机整平网片时,右手不慎被整平机压伤。操作整平机不是李某的本职工作。     

水泥立窑的旋流板湿式除尘新技术

针对水泥立窑尾气治理现状，提出以旋流板分离技术为核心的湿式除尘新技术。试验结果表明：除尘效率选96．5％，粉尘排和浓度低于150mg/nm^3。     

胀断连杆技术填补国内空白

日前从云南西仪工业股份有限公司举行的连杆精锻毛坯和总成胀断生产线竣工投产仪式上了解到,公司积极抢抓机遇调结构,依靠科技促发展,自主研发的胀断工艺技术已经成功开发江铃汽车公司VM胀断连杆和上汽1．5L胀断连杆,并实现批量生产,该项技术填补了国内胀断连杆自主开发空白。仅此一项年产值将超亿元。     

Solubility of ion and trace metals from stabilized sewage sludge by fly ash and alkaline mine tailing

Stabilized sewage sludge （SS） by fly ash （FA） and alkaline mine tailing as artificial soil, to be applied on the ecological rehabilitation at mining junkyards, offers a potentially viable utilization of the industrial by-product, as well as solves the shortage of soil resource in the mine area. An incubation experiment with different ratios of SS and FA was conducted to evaluate the solubility of ions and trace elements from stabilized sewage sludge. Results showed that fly ash offset a decrease in pH value of sewage sludge. The pH of （C） treatment （FA：SS = 1：1） was stable and tended to neutrality. The SO4^2- and Cl^- concentrations of the solution in the mixture were significantly decreased in the stabilized sewage sludge by alkaline fly ash and mine tailing, compared to the single SS treatment. Stabilized sewage sludge by FA weakened the nitrification of total nitrogen from SS when the proportion of FA in the mixture was more than 50%. The Cr, Ni, and Cu concentrations in the solution were gradually decreased and achieved a stable level after 22 days, for all treatments over the duration of the incubation. Moreover stabilized sewage sludge by fly ash and/or mine tailing notably decreased the trace metal solubility. The final Cr, Cu, and Ni concentrations in the solution for all mixtures of treatments were lower than 2.5, 15, and 50 μg/L, respectively.     

谈污染土壤的水泥窑共处置技术

摘要：从已有的工程实例,本文总结了污染土壤水泥窑共处置的可行性,水泥窑共处置污染土壤的类型,水泥窑共处置的投料方案,水泥窑共处置对水泥窑达标排放的影响以及污染土壤水泥窑共处置的注意事项。     

Stabilization effects of surplus soft clay with cement and GBF slag

Utilization of industrial waste and surplus construction soft clay as construction material was recommended, and many attempts at geotechnical waste utilization were undertaken. This study aimed at the application of cement and a kind of industrial wastes, i.e. granulated blast furnace slag, on stabilization of surplus soft clay. The results showed that the cement and slag can successfully stabilize Ariake clays even though this high organic clay fails to be stabilized by lime and cement. Addition of slag in cement for stabilization induces higher strength than cement alone for longer curing time. The application of the cement with slag is more suitable than cement alone for stabilization because of economical consideration.     

四川省水泥行业清洁生产水平评价及建议

为了解四川省水泥行业清洁生产现状及水平,首先梳理总结了四川省水泥行业清洁生产审核概况及成效,然后选取44家水泥熟料企业按照《水泥行业清洁生产评价指标体系》进行清洁生产水平评价,评价得出有18家企业达到国内先进水平,同时有19家企业有较大潜力进一步提高至国内先进水平,最后根据评价结果提出了相关建议。