高强度管线钢落锤撕裂性能的试验

摘要：以X80管线钢为试验材料，采用金相显微镜和扫描电子显微镜，研究了显微组织、M/A、夹杂物对管线钢落锤撕裂性能的影响。结果表明，管线钢落锤撕裂性能（DWTT）随着多边形铁素体体积分数的增加而改善，当多边形铁素体的体积分数超过某一临界值(约28%)后，DWTT性能开始降低；组织中的M/A岛细小且弥散分布，其尺寸控制在纳米级别有利于改善DWTT性能；针对本研究试验钢，若其厚度方向上组织均匀、组织中铁素体体积分数为28%、M/A岛平均尺寸和比例分别为0.42μm和2.8%时，试验钢具有最好的落锤撕裂性能（韧性剪切面积率94.5%）。     

DP980高强钢连续退火后的组织与性能

研究了不同工艺参数对980 MPa级连续退火双相钢组织及力学性能的影响,利用光学显微镜、透射电镜(TEM)以及拉伸试验对双相钢的微观组织和力学性能进行测试及分析。结果表明:DP980钢的退火组织主要由铁素体、马氏体岛和少量的贝氏体组成,马氏体岛附近的位错密度较高。随着均热温度的升高,DP980钢的抗拉强度呈现先降低后升高的趋势,屈服强度与抗拉强度的趋势一致,伸长率先升高后降低。随着过时效温度的升高,DP980钢的抗拉强度和屈服强度降低,降低幅度较小,伸长率上升,但变化不明显,说明通过调整过时效温度来调控其力学性能的作用较小。     

Alternatives for improving energy security in Cape Verde

The lack of consensus on the meaning of energy security and how it should be measured hinders the evaluation of alternatives for improving the Cape Verdean energy sector. The objective of the paper is to develop an energy security index adjusted to the country's context. The methods used are the multi-criteria analysis and the Delphi survey. Different alternatives to improve energy security are assessed: electrically interconnect Cape Verde's islands, increase the share of renewable energy, and a combination of the previous alternatives. The results of our analysis indicate that increasing renewable energy is the optimal alternative for Cape Verde.     

废弃电子化学品处理处置标准现状及发展方向

重点介绍了废弃电子化学品定义、产生来源、处理处置现状、处理处置标准化现状及标准发展方向。从废弃电子化学品行业实际情况出发,具体分析了行业现状、处理处置水平及标准化工作的开展情况等。通过标准的制定实施,以及其创新驱动作用的发挥,规范了行业处理处置行为,推动行业科技进步,对全面提升废弃电子化学品处理处置技术水平,实现循环经济、绿色产业和资源化利用有着十分重要的作用。     

PLC控制在气力除灰系统的应用

本文根据攀钢发电厂除灰系统的控制性能要求,采用“上位机+PLC”组成的控制系统实现对除灰系统的控制.该控制系统具有抗干扰能力强、可靠性高、操作简便、扩展方便等优点.     

关于污水处理厂自动控制系统设计分析

随着我国市场经济的快速发展，环境问题已成为了一个严重的问题，其中污水处理问题就是人们需要亟待解决的问题。目前，我国已经建立了很多污水处理厂，其中自动控制系统是污水处理的关键技术，实现了污水处理厂的自动化控制，并且对工艺参数、数据进行采集、分析和管理，保证了出水的达标，提高了生产效率，降低了生产成本。本文主要介绍了污水处理厂自动控制系统的特点和功能，并介绍了自动控制系统的总体设计原则以及对各部分设计进行分析等，希望能保证污水处理厂的自动控制系统设计更加合理。     

Estimation of magnetic island width by the fluctuations of electron cyclotron emission radiometer on J-TEXT

The width of a magnetic island is an important parameter for the quantitative analysis of magnetohydrodynamic-related physics. An electron cyclotron emission radiometer(ECE) is a powerful tool that can be used to obtain this width, which can usually be determined from the flat temperature distribution at the O-point phase or the maxima temperature perturbation. An improved method to estimate the width of a magnetic island is proposed in this paper, and it is independent of calibration. With this method and the existing 24-channel ECE system, the width of a rotation magnetic island can be estimated. Additionally, by filtering the fluctuation ECE signal, the evolution of the magnetic island can be obtained. The results of this method are consistent with those of the integrated magnetic probe signals, which represent the relative change of the magnetic island.     

Assessment of tracing element characteristics of F-type fly and bottom ash mixture

Presently, fly ash–water slurry is transported to ash disposal site at very low solid concentration of approximately 15–20% (by weight), resulting in huge water and energy wastage which leads to several environmental and health problem. The production of a large amount of the toxic metal elements in the ash disposal system of the thermal power plants can pose negative environmental effects on human health and on plants. In the present study, an attempt has been made to investigate the leaching characteristics of fly ash at higher concentrations. The bottom ash was taken as an additive in the proportion of 10, 20, and 30% (by weight) to enhance the leaching characteristics of fly ash. The solid concentration of fly ash suspension was taken in the range of 40 to 60% (by weight). The addition of additive helps to reduce the tracing metal concentration of fly ash. Leaching experiment data show that leachate concentration of all tracing elements present in fly ash reduced maximum with 20% addition of bottom ash (by weight). The present study helps to improve the ash disposal system of the thermal power plant and to minimize the environmental impact.     

某烧绿石尾矿选铌试验研究

国外某地含有丰富的烧绿石资源，属碱性碳酸盐矿体，原矿Nb2O5含量大于1%，在经历长流程胺法烧绿石浮选之后，尾矿含Nb2O5较高，铌资源未能得到综合回收，该烧绿石尾矿仍具有较高的回收价值。由于该尾矿长期在尾矿库堆存，药剂污染严重、含泥量较大，本工艺预先采用“磨矿擦洗-脱泥”的工艺改善其浮选性质，然后通过“磁选-脱钙”的工艺进行杂质矿物抛废，最终采用螯合类组合捕收剂实现烧绿石的选择性高效捕收。在原料Nb2O5品位0.71%的条件下，获得了Nb2O5品位55.07%、回收率38.23%的烧绿石精矿，尾矿中烧绿石资源得到回收。