狮子洋隧道围岩磨蚀性研究

岩石磨蚀性通常以岩石磨蚀性指数CAI(cerchar abrasivity index)值来表示,它是反映盾构刀盘和刀具磨损的重要指数。以广深港客运专线狮子洋隧道工程为背景,对同等风化程度下的岩石进行Cerchar磨蚀性实验和岩石矿物X射线衍射分析实验,确定岩石磨蚀性指数CAI值和岩石矿物成分,并对岩石矿物组成与磨蚀性指数CAI值进行相关性分析。研究结果表明,同等风化程度下的岩石,岩石矿物组成对磨蚀性影响较大,岩石矿物加权硬度值H与CAI值有非常好的线性关系,且线性相关性要高于岩石等效石英含量Qeq与CAI值的线性相关性,岩石矿物加权硬度值更能准确地反映岩石矿物组成对磨蚀性的影响。狮子洋隧道围岩中砂岩磨蚀性最强,对刀具的磨损较大。另外狮子洋隧道围岩含有大量的砂粒胶结物,盾构施工过程中会产生大量的石英含量较高的岩粉,这些岩粉进入循环的泥水中,会对盾构刀盘、刀具和泥水管道造成一定的磨损。     

γ辐射法制备壳聚糖接枝共聚物及其絮凝性能

以壳聚糖(Cts)和甲基丙烯酸(MAA)为原料,应用γ射线辐射引发技术进行接枝共聚反应,制备了壳聚糖与甲基丙烯酸的接枝共聚产物(Cts-g-MAA),采用搅拌实验和测浊度法研究接枝改性壳聚糖对铅锌选矿废水的絮凝效果,其中考察了废水pH值、Cts-g-MAA的质量浓度、快速搅拌速度、慢速搅拌时间、静置时间对絮凝效果的影响,并将其与壳聚糖的絮凝能力进行了对比.实验结果表明,废水的pH值、絮凝剂质量浓度、搅拌速度、搅拌时间和静置时间均对絮凝效果产生影响,其最佳絮凝条件为pH值8.5、Cts-g-MAA浓度1.2mg/L、搅拌强度300 r/min、慢速搅拌时间为10 min、静置时间为11 min,此条件下的浊度去除率达98.6%.接枝改性壳聚糖的絮凝效果好于壳聚糖,且絮凝时的用量明显低于壳聚糖.     

河南省饮用天然矿泉水资源及开发利用与保护

河南省现有饮用天然矿泉水水源地152个,共5种类型,允许开采总量6431.33×104m3/a.矿泉水多属中性、淡水,达标元素较单一.目前矿泉水年产量10.29×104m3,开发中存在水源保护形式严峻、资源浪费严重、市场占有率低等问题.分析了矿泉水利用方向,划分了5个矿泉水开发保护区,指出优先开发碘、硒等稀有矿泉水,鼓励太行山区及嵩箕山东麓的开发,限制平原区开采.     

埋地管道阴极保护方法在氧化铝行业的应用

介绍了埋地管线的阴极保护原理,阐述了埋地管道的阴极保护方法和牺牲阳极保护法选用及布点的技术要求。     

青铜器复、仿制品的表面处理研究

本主要研究了青铜器在复、仿制过程中如何除氧化皮、抛光及除油等一系列问题，并在实际应用中减轻相当的劳动强度，提高了劳动效率。     

河北省矿产资源与跨世纪可持续发展战略

河北省拥有丰富的矿产资源。本文从对矿产资源评价出发，针对矿产资源开发利用及管理中存在的问题提出建议，旨在实现河北省社会经济发展与资源，环境相协调，走可持续发展之路。     

Catalytic decarboxylation of fatty acid by iron-containing minerals in immature oil source rocks at low temperature

The catalytic activities of seven immature source rocks in China on fatty acid decar-boxylation for generating hydrocarbons have been evaluated by determinating the CO2 content from decarboxylation reaction of stearic acid. It has been found that the catalytic activities of immature source rocks mainly depend on the structure type of the minerals. In general, the catalytic activities of carbonates are higher than those of clays at low temperature. The higher its iron content, the higher the catalytic activity of carbonate.     

Domain structure of hard magnetic NdAlFeCo bulk metallic glass

Magnetic domain structure of hard magnetic Nd₆₀Al₁₀Fe₂₀Co₁₀ bulk metallic glass (BMG) has been studied by using magnetic force microscopy. In the magnetic force images it is shown that the exchange interaction type magnetic domains with a period of about 360 nm do exist in the BMG, which is believed to be associated with the appearance of hard-magnetic properties in this system. As the scale of the magnetic domain is much larger than the size of the short-range ordered atomic clusters existing in the BMG, it is believed that the large areas of magnetic contrast are actually a collection of a group of clusters aligned in parallel by strong exchange coupling interaction. After fully crystallization, the BMG exhibits paramagnetism. No obvious magnetic contrast is observed in the magnetic force images of fully crystallized samples, except for a small quantity of ferromagnetic crystalline phase with low coercivity and an average size of 900 nm.     

矿产资源与经济发展

矿产资源及其开发利用与经济发展关系密切 ,矿产品总量与国内秤总值存在着正相关的数量依存关系 ,无论是工业化经济时工 ,还是知识 (科业 )经济时工 ,矿产资源的可持续利用都是经济可持续发展的必要条件。结合四川省矿产资源状况 ,经济发展规划 ,在预测矿产品需求量的基础上 ,评价了四川矿产资源保证程度及可持续供给能力 ,提出可持续利用的对策建议     

Metallic Glass Formation by Ion Mixing and Calculation of Glass-Forming-Ability from Inter-Atomic Potential in the Binary Metal Systems

In this article, a brief summary of the up-to-date progress of metallic glass formation by ion mixing of metallic multilayers in the binary metal systems is first presented. Secondly, thermodynamic modeling of metallic glass formation is developed with special consideration of the interfacial free energy of the multilayers. Thirdly, results of molecular dynamics simulations for some representative systems are presented to show the calculation of the glass-forming ability directly from the inter-atomic potential of the binary metal systems.