从热滤渣中富集提取贵金属

介绍了减压蒸馏脱硫，熔炼富集，高温悬浮氯气浸出处理热滤渣的工艺。其综合利用好，元素硫脱除率〉９２％，贱金属浸出率〉９５％，贵金属回收率〉９９％。贵金属富集物可并入贵金属精炼分离工段处理。     

CO2体积分数对燃煤细颗粒物在水汽环境中凝结长大的影响

为研究燃煤烟气中CO₂体积分数对细颗粒物在水汽环境中凝结长大效果的影响,建立了计算模型并搭建了实验平台,分别从理论计算和实验研究两方面探讨了CO₂体积分数对细颗粒物凝结长大效果的影响。结果表明:随着CO₂体积分数升高,混合烟气的热、质扩散系数均降低,生长管内平均过饱和度增加,细颗粒物长大效果明显;管壁温度越高,随着CO₂体积分数的提高,细颗粒物粒径越大。     

高流速含沙浑水体流变特性试验研究

加速行进中的洪水具有高含沙、高流速和粗粒径的特点,而针对洪水的流变特性研究关注点多为高含沙量,忽略了高流速即高剪切速率的特点。以黄河下游泥沙为研究对象,系统地研究了高流速剪切条件下含沙量、剪切模式、温度和盐度对流变特性的影响。结果表明,在高流速剪切条件下（剪切速率≥ 1200 s-1,对应线性流速为3.6 m/s）,含沙量在106.64 ~ 957.83 kg/m3范围内的浑水体符合牛顿流体的应力本构关系,不存在屈服应力,表观黏度与含沙量呈指数关系。温度降低并未改变浑水体的流变特性,但会使其表观黏度增加,且温度越低黏度增幅越大,浑水体黏度增大梯度约为等温度清水的数倍至十几倍。盐度变化对该测试浑水体的表观黏度和流变特性影响甚微,可忽略不计。本研究结果可为高流速水流挟沙和远距离输沙研究提供理论参考。     

Potential of Silver Nanoparticles in Overcoming the Intrinsic Resistance of Pseudomonas aeruginosa to Secondary Metabolites from Carnivorous Plants

Carnivorous plants are exemplary natural sources of secondary metabolites with biological activity. However, the therapeutic antimicrobial potential of these compounds is limited due to intrinsic resistance of selected bacterial pathogens, among which Pseudomonas aeruginosa represents an extreme example. The objective of the study was to overcome the intrinsic resistance of P. aeruginosa by combining silver nanoparticles (AgNPs) with secondary metabolites from selected carnivorous plant species. We employed the broth microdilution method, the checkerboard titration technique and comprehensive phytochemical analyses to define interactions between nanoparticles and active compounds from carnivorous plants. It has been confirmed that P. aeruginosa is resistant to a broad range of secondary metabolites from carnivorous plants, i.e., naphthoquinones, flavonoids, phenolic acids (MBC = 512 µg mL⁻¹) and only weakly sensitive to their mixtures, i.e., extracts and extracts’ fractions. However, it was shown that the antimicrobial activity of extracts and fractions with a significant level of naphthoquinone (plumbagin) was significantly enhanced by AgNPs. Our studies clearly demonstrated a crucial role of naphthoquinones in AgNPs and extract interaction, as well as depicted the potential of AgNPs to restore the bactericidal activity of naphthoquinones towards P. aeruginosa. Our findings indicate the significant potential of nanoparticles to modulate the activity of selected secondary metabolites and revisit their antimicrobial potential towards human pathogenic bacteria.     

铜冶炼渣尾矿综合利用现状及研究

铜冶炼炉渣含有大量的有价金属元素,经过选矿工艺处理后,大部分铜被回收,选出的渣精矿返回熔炼炉,渣尾矿外售至水泥厂,尾矿中有价金属仍存在较大利用价值,在现有工艺流程后增加磁选工艺,磁选后的铁精粉用作炼钢配料,尾矿外售。主要介绍了熔炼渣及尾矿成分,现有工艺尾矿处理方式,新工艺的应用及实践。     

伊利石在铝酸钠溶液中的反应脱硅过程研究

为了更清楚地了解伊利石在拜耳法溶出过程中的反应行为，本文对伊利石在合成铝酸钠溶液中的溶出动力学进行了研究，测得其活化能为114，73kJ/mol。并研究了溶液苛性碱浓度对伊利石的反应速率的影响；添加石灰可以有效的增加伊利石的反应率，提高脱硅效率。为拜耳法生产氧化铝的脱硅过程及防止结疤提供理论依据。     

CNG储气瓶的金属磁记忆检测

使用金属磁记忆检测方法和超声方法对在役的七组公交车CNG高压储气瓶组进行了检测,并对比分析了两种方法的检测结果。结果表明,金属磁记忆方法检测到的可疑区域涵盖了超声检测到的缺陷区域,因此用磁记忆方法检测高压储气瓶,有较高的可靠性和高效性。     

氢及缺口状态对40CrNiMo钢断裂强度的影响

通过对４０ＣｒＮｉＭｏ光滑与三种不同缺口状态的试样进行试验发现，氢对材料强度的影响与外加应变速率的大小有关。在空气中试验，缺口状态对材料断裂强度几乎无影响；而在氢气中试验，则发现缺口根部半径Ｒ的变化对材料断裂强度影响极大；当缺口根部半径一定，仅改变外径Ｄ或缺口处最小直径ｄ所得两种缺口状态对缺口强度的影响不大。     

气液并流吸收过程中液相近界面浓度分布的全息干涉测量

1 INTRODUCTION Mass transfer across free interface of gas-liquid flow is of extensive importance and is encountered in most industrial applications. A close investigation of concentration distribution near the interface is helpful to understand mass transfer phenomena, to guide the development of transport theories, and to optimize the design of gas-liquid contact equipment. Laser holographic interference technique provides a precise and noncontact measurement method for measuring the tran…     

磷酸浓缩氟吸收问题的探讨

将我国现有的几种磷酸浓缩流程和实际应用效果进行比较 ,并从氟吸收机理分析探讨氟吸收级数与吸收效率的关系 ;氟硅酸浓度、温度与吸收效率的关系 ;吸收设备和雾沫分离器选型等