云南省利用水泥回转窑处置危险废物的前景

利用独特的设备和水泥窑的工艺特点,用废物代替水泥生产中的原材料,合理处置危险废物,使环境治理和循环经济达到有效的结合,是一项废物处理和资源化的新途径,是水泥生产企业可持续发展的方向之一,具有广阔的发展前景。     

熔池高度对双辊薄带凝固组织影响的模拟预测

在已建立的理论数学模型的基础上,以1Cr18Ni9Ti不锈钢为研究对象,模拟预测了薄带厚度保持不变条件下熔池高度对薄带凝固组织的影响。研究结果表明:随着熔池高度增加,1Cr18Ni9Ti不锈钢双辊薄带凝固组织中柱状晶区比例首先增大,然后又逐渐减小。而柱状枝晶取向度和枝晶间距则随着熔池高度的增加而增大,但在较低的熔池高度条件下,柱状枝晶间距在凝固结束时有突然增大的趋势。     

Methodological and Practical Considerations for Developing Multiproject Baselines for Electric Power and Cement Industry Projects in Central America

The Lawrence Berkeley National Laboratory (Berkeley Lab) and the Center for Sustainable Development in the Americas (CSDA) conducted technical studies and organized two training workshops to develop capacity in Central America for the evaluation of climate change projects. This paper describes the results of two baseline case studies conducted for these workshops, one for the power sector and one for the cement industry, that were devised to illustrate certain approaches to baseline setting. Multiproject baseline emission rates (BERs) for the main Guatemalan electricity grid were calculated from 2001 data. In recent years, the Guatemalan power sector has experienced rapid growth; thus, a sufficient number of new plants have been built to estimate viable BERs. We found that BERs for baseload plants offsetting additional baseload capacity ranged from 0.702 kgCO2/kWh (using a weighted average stringency) to 0.507 kgCO2/kWh (using a 10th percentile stringency), while the baseline for plants offsetting load-following capacity is lower at 0.567 kgCO2/kWh. For power displaced from existing load-following plants, the rate is higher, 0.735 kgCO2/kWh, as a result of the age of some plants used for meeting peak loads and the infrequency of their use. The approved consolidated methodology for the Clean Development Mechanism yields a single rate of 0.753 kgCO2/kWh. Due to the relatively small number of cement plants in the region and the regional nature of the cement market, all of Central America was chosen as the geographic boundary for setting cement industry BERs. Unfortunately, actual operations and output data were unobtainable for most of the plants in the region, and many data were estimated. Cement industry BERs ranged from 205 kgCO2 to 225 kgCO2 per metric ton of cement.     

工业废石膏在地基加固中的应用

研究和实践表明:工业废石膏与水泥配合加固软土地基,与单用水泥加固相比,加固土强度可以成倍提高。废石膏的最佳掺量一般为水泥用量的20%左右。用废石膏水泥加固时,其水化物不仅有与水泥相同的水化硅酸钙将松散的土粒胶结成整体,而且还产生钙矾石,其晶体膨胀填充孙隙使加固土强度进一步提高。利用废石膏加固地基不会产生二次污染。     

粉煤灰增钙渣水泥试验研究

提出了粉煤灰增钙渣水泥的最佳配合比及工艺技术参数。并介绍了该品种水泥的物理力学性能，为粉煤灰增钙渣水泥的生产与应用提供了一定的依据     

雾化合金液滴的凝固动力学分析与计算

雾化凝固过程对雾化制粉和喷射沉积材料的组织有重要影响。雾化凝固过程主要由液态冷却、再辉、偏析凝固、共晶凝固与固态凝固阶段组成。分析了雾化过程中的液滴的速度与粒度分布及凝固各阶段液滴凝固潜热的释放与环境导热之间的热平衡。     

印刷线路板厂含铜污泥固化处理工艺研究

研究采用水泥作固化基材固化处理某印刷线路板厂酸性废水用石灰混凝所产生的含铜、锡、金的污泥 ,对固化块在不同 pH的水中重金属Cu2 +的浸出实验结果表明 :水泥固化处理该混凝污泥效果良好 ,控制合适的条件 ,可得到混合性能好、初凝时间适当、抗压强度较好的固化块。Cu2 +的浸出率低于允许浸出浓度。混凝过程中加入硫脲硅酸钠等助剂 ,可提高固化效果。研究还对几种不同配比的固化块抗压强度进行了探讨。     

城市生活垃圾焚烧飞灰熔融处理的进展

针对城市生活垃圾焚烧产生飞灰的处理以及由此引发的二次污染问题,阐述了飞灰的污染特性,讨论了各种飞灰处理技术的优缺点,分析了熔融处理技术在降低飞灰中重金属浸出毒性和彻底分解其中的二恶英所具有的优越性,为飞灰的无害化和资源化处理提供参考。     

油田废污泥治理研究

冀东油田废水池地处环境敏感区域，对其废污泥采用固化法进行处理。在大量实验的基础上优选出了三种固化剂体系并通过多次浸泡实验、淋洗实验和静态浸出实验对固化效果进行了分析。     

深水淹没高喷注浆帷幕技术

介绍导孔钻进、旋喷注浆成桩、桩顶沉降回灌等三重管高压旋喷注浆技术、参数、设备、工艺及其在上海市杨树浦水厂改建工程中的成功应用。该技术对保证安全、优质、高效的施工发挥了重要作用。