闪速炼铜过程中四氧化三铁的生成与控制

闪速炉炼铜炉渣中含Fe3 O4较高 ,这是渣含铜高和沉淀池结瘤的主要原因。本文结合生产实践 ,论述了Fe3 O4在闪速熔炼过程中的生成机理 ,并在生产中采取一系列措施 ,如 :通过下料管、分布器等设备改造改善精矿喷嘴性能 ,反应塔加焦粉 ,沉淀池加生铁 ,并适当提高炉渣SiO2 含量等 ,以减少Fe3 O4对生产过程的危害。     

高罗-西坪地区南津关组底部沉积型铅锌矿基本特征及找矿方向

鄂西南是湘西—鄂西成矿带中的重要成矿区域,具有良好的铅锌成矿条件,铅锌矿点多。但具有区域找矿意义的是赋存于下奥陶统南津关组底部生物碎屑灰岩中的沉积型铅锌矿床,在高罗—西坪地区非常典型。高罗-西坪地区南津关组底部沉积型铅锌矿成带展布,成片集中。该沉积型铅锌矿是近二、三年来科研成果的重大发现。     

Soot measurements in a chlorinated counterflow diffusion flame using a laser scattering and extinction technique

The effects of the presence of chlorinated species on soot formation have been studied in laminar diffusion flames burning chlorinated hydrocarbons. Measurements have been made of the structure of a chlorinated laminar, diffusion flame that is stabilized in a stagnation point flow around a porous cylinder. Comparisons have been made between a pure methane flame and a flame of 50% methane and 50% methyl chloride. Temperature profiles were obtained with a thermocouple. Laser Doppler velocimetry was used to measure the velocity of the gas along the streamline. Laser extinction and scattering techniques were employed to characterize the soot aerosol. It was found that the addition of the methyl chloride to methane caused soot production, as measured by the soot volume fraction, to increase by at least an order of magnitude.     

歧口凹陷古近系沙河街组一段下亚段湖盆咸化成因

歧口凹陷沙河街组一段下亚段（简称沙一下亚段）在整体湖扩的背景下形成了多套薄层白云岩发育于暗色泥岩的特殊岩性段,显示出较强的咸化湖盆环境。对研究区内不同岩性样品进行的微量元素分析结果表明,歧口凹陷沙一下亚段主要为盐度较大的咸水环境;碳、氧稳定同位素测试显示该区碳酸盐岩δ¹³C 偏正异常明显,Z值分布范围为111~168.52;锶稳定同位素分布范围略高于同期海水,远低于同期河、湖水。结合薄片观察中发现的具指相意义的海绿石、胶磷矿,扫描电镜下发现的钙质超微化石研究表明,歧口凹陷沙一下亚段湖盆咸化可能是海侵所致。     

准噶尔盆地西北缘沉积特征及油气成藏规律——以五、八区佳木河组为例

准噶尔盆地西北缘前陆冲断带是剖析西准噶尔地区盆山耦合关系、盆地成因与造山带演化、沉积体系发育的关键地段。准噶尔盆地西北缘五、八区二叠系佳木河组为火山岩、火山碎屑岩、碎屑岩组成的混积地层,佳木河组下亚组分为2个三级层序PSQ1、PSQ2,中亚组和上亚组分别为三级层序PSQ3和PSQ4,下亚组主要充填火山岩和火山碎屑岩,中亚组及上亚组主要充填扇三角洲为主的粗碎屑沉积物。五、八区佳木河组主要发育扇三角洲相、火山口及近火山口相、远火山口相,扇三角洲砂体和火山岩体是最重要的油气储集体。研究区已知油气藏多分布于扇三角洲平原亚相、前缘亚相和火山口及近火山口相中,但是否能成藏关键在于构造（裂缝）、成岩作用、油源、圈闭等与储集层的空间匹配关系。图4参18     

Epitaxial growth of GaN on (0001) Al<Subscript>2</Subscript>O<Subscript>3</Subscript> via solution-cast seed layer formation process using Ga(mDTC)<Subscript>3</Subscript>

This paper reports an alternative method for the growth of GaN epitaxial layer on (0001) Al₂O₃ substrate by hot-wall vapor phase epitaxy technique. Tris (N,N-dimethyldithiocarbamato)-gallium (III), Ga(mDTC)₃ was introduced as a precursor material for the seed layer formation in the growth of GaN. Optimal growth conditions with seed layers formed by the Ga(mDTC)₃ concentration of 0.047 mol/L were identified: Growth temperature was found to be 850 °C, and optimal distance between the reactant outlet and substrate was determined to be 12.5 cm. Characterization results showed that this growth method produce high-crystallinity GaN epitaxial layers at a relatively lower growth temperature compared to the existing growth techniques and simplify the growth process.     

鄂尔多斯盆地西部延长组长8- 长10油组沉积测井响应特征

鄂尔多斯盆地晚三叠世时沉积构造活动较弱,水动力作用比较强。不同沉积环境具有不同的水动力特点,各种沉积环境的水动力条件,既控制着岩性、粒度、分选性、泥质含量的变化,同时也控制着岩石导电性、自然电位、自然放射性、声波传导特性等物理性质的变化,不同沉积环境形成的层序序列以及岩性变化常常具有各种测井曲线形态,测井曲线正是岩石各种物理性质沿井孔深度变化的物理响应。     

Effects of concentration and temperature on the formation process of decanethiol self-assembled monolayer on Au(1 1 1) followed by electrochemical reductive desorption

The formation process of self-assembled monolayer (SAM) of decanethiol (C10SH) on Au(1 1 1) single crystal electrode has been investigated for wide range of C10SH concentration (0.1-500 μM) and temperature (253-298 K). The amount and quality of C10SH SAM were determined from area and position, respectively, of reductive desorption peak of the SAM modified Au(1 1 1) electrode measured in 0.5 M KOH aqueous solution. The kinetic analysis indicates that SAM formation proceeded by two steps, diffusion-limited physisorption followed by chemisorption.     

苏北盆地上白垩统泰州组烃源层评价

苏北盆地泰州组烃源层是国内少有的上白垩统烃源层,其有机质丰度高,干酪根类型为偏腐泥型,处于低熟—成熟演化阶段。尽管泰州组烃源层厚度较薄(20~30m),但近年来的勘探已发现9个由泰州组烃源层供烃的油藏。泰州组烃源层与电阻率六尖峰段相对应,该特征代表了发育于半深湖—深湖、半咸水—咸水环境、以化学成因为主的泥质碳酸盐岩及其有机质形成特征。     

西域组钙质胶结砾岩物质构成试验研究

西域组砾岩的物质构成较为复杂,目前对其试验研究较少。以分析西域组钙质胶结砾岩的物质构成为目标,通过酸化浸泡试验和CAD断面统计方法,并结合气体收集方法,来对西域组钙质胶结砾岩的物质构成进行初步的试验研究,运用两种不同比例盐酸溶液对砾岩试样的颗粒级配进行酸化试验分析。结果表明:经过1∶1盐酸溶液浸泡后0. 075 mm粒径损失较大,1∶4盐酸溶液浸泡后试验结果较为理想;酸化分离筛分和CAD断面统计粒径含量结果基本一致;西域组钙质胶结砾岩碳酸盐含量为70%～80%,其余20%为碎屑物质和填隙物;碎屑物质中粒径 2 mm的砾石平均含量为65. 2%,粒径2～0. 075 mm的砂平均含量为13. 2%,粒径0. 075 mm的细粒平均含量为21. 6%。通过试验还发现钙质胶结砾岩中存在有某些物质与盐酸发生了反应,对试验结果产生了一定的影响。