铝阳极电凝聚处理活性红241染料模拟废水

本文考察了电流密度、初始pH值、电解质浓度及种类、温度、染料浓度因素对铝阳极电凝聚处理活性红241模拟废水的影响。结果表明,在一定实验条件下,电流强度、染料浓度、电解液初始pH值、NaCl电解质浓度、温度对染料溶液脱色效率的影响明显,而Na2SO4电解质浓度对脱色效率的影响不显著;在电凝聚处理过程中,主要作用机理是以Al3 的单核水解产物与染料络合作用占主导地位;活性红241在阴极上发生了还原反应。     

高压变频器在化工装置的应用

介绍了＂多重化移相整流技术和单元电平串连叠加技术＂高压变频调速系统在某化工厂丙烯酸装置循环水泵应用情况,并论述了变频器在实际生产中易操作、免维护、节能效果明显等特点。     

无刷励磁同步电动机异常振动故障分析

针对一台无刷励磁同步电动机异步运行时正常,而牵入同步运行时产生振动的现象,进行了故障分析,并对旋转整流盘、励磁机的串入电路波形进行了检测分析并逐一排除,最后利用交流阻抗电压测试法查明了磁极绕组短接的故障点,实施绝缘处理后使电机异常振动问题得以解决。     

Preparation of hydroxyapatite/α-tricalcium phosphate composites by colloidal process

Synthesised hydroxyapatite (HAp)/α-tricalcium phosphate (α-TCP) composites were prepared by colloidal process. Mixed slurries composed of 30 vol% HAp/α-TCP powder and 70 vol% aqueous solution containing a small amount of polymer dispersant were produced. HAp/α-TCP powder was blended with 0, 0.2, 0.4 or 1.0 mass fraction of α-TCP. Rheological behaviour of the HAp/α-TCP mixed slurries depended on the quantity of polymer dispersant and pH. Addition of suitable quantity of polymer dispersant at higher pH resulted in an increase in the stability of colloidal state due to electrostatic stabilisation. The optimum quantity of dispersant for the colloidal process was found to be proportional to the mass fraction of α-TCP. In the dehydration process of the slurries, pressure filtration technique was effective in preventing the gravity segregation of α-TCP. Thus, HAp/α-TCP composites with homogeneous microstructure and high relative density could be prepared by optimising the colloidal process.     

辽宁调兵山西调斑岩型钼矿床特征及找矿标志

西调钼矿位于华北板块北缘的法库断凸与吉黑褶皱系的接壤部位,该区具有良好的斑岩型钼矿的成矿潜力。西调钼矿主要产于石炭系黄顶子岩组及侵入的侏罗系晚期二长花岗岩之中,钼矿石呈细脉浸染状产出。激电中梯及钻探结果显示矿体主要受区域上北北东向构造控制,多呈近南北向展布,钼矿(化)体主要位于高阻的中心以及高极化率体边缘的位置。土壤地球化学测量圈定Mo、Au、Ag、Cu、Pb、Zn异常共计53处,其中以Mo的异常规模最大、强度最高,并且显示HT1、HT2、HT3等3个综合异常区带,HT1异常区带与发现的钼矿(化)体吻合度较高。文章在详细研究矿床地质特征、地球物理特征及地球化学特征的基础上,初步推断其成因类型为与燕山期花岗岩有关的斑岩型钼矿床。同时认为该区燕山期岩浆与石炭系黄顶子岩组的接触地带、高阻及高极化率以及土壤地球化学Mo异常区是该区重要的钼矿找矿地带。     

外环流高粘度凸轮泵的研制

介绍了新型外环流高粘度凸轮泵的结构、原理及性能特点,以便读者了解和掌握外环流高粘度凸轮泵,并将试制过程中解决的技术问题作了扼要介绍。     

基于定制的中小制造企业产品开发研究

文章研究了产品族和基于定制的产品开发流程,结合产品数据管理系统提出了基于定制的产品开发平台框架,这使得企业在满足顾客个性化需求的同时,又保持较低的生产成本和较短的交货期,为其赢得竞争优势。最后,在小型冶金机械设备产品设计的实例中得到验证。     

球团环冷机泄露原因分析

本文主要介绍了球团生产线的详细情形,深入剖析了在生产开展过程中球团环冷机可能出现的泄露问题并提出相应的解决方法。经过系统的治理手段,将球团环冷机的沙封槽改为水封槽,在相当程度上避免了漏风漏料等问题的发生,使得球团的运行稳定而健康能够保持平稳运行,拥有良好的节能效果,应用效果良好。     

A calibrated Monte Carlo approach to quantify the impacts of misorientation and different driving forces on texture development

A calibrated Monte Carlo (cMC) approach, which quantifies grain boundary kinetics within a generic setting, is presented. The influence of misorientation is captured by adding a scaling coefficient in the spin flipping probability equation, while the contribution of different driving forces is weighted using a partition function. The calibration process relies on the established parametric links between Monte Carlo (MC) and sharp-interface models. The cMC algorithm quantifies microstructural evolution under complex thermomechanical environments and remedies some of the difficulties associated with conventional MC models. After validation, the cMC approach is applied to quantify the texture development of polycrystalline materials with influences of misorientation and inhomogeneous bulk energy across grain boundaries. The results are in good agreement with theory and experiments.     

酮咯酸氨丁三醇眼用凝胶剂的制备工艺与质量控制

目的研究制备酮咯酸氨丁三醇眼用凝胶剂的工艺并建立质量控制方法。方法以卡波姆-934为凝胶基质,制备酮咯酸氨丁三醇眼用凝胶;用高效液相色谱法测定其主药酮咯酸氨丁三醇含量,色谱条件：Dikma C18柱（150 mm×4.6 mm,5μm）;流动相：甲醇︰水︰冰醋酸（55︰44︰1）;柱温：室温;检测波长：323 nm;流速：1.0 mL/min。结果处方为：卡波姆-934 0.5%,丙二醇1.0%,硼砂1.0%,硼酸0.5%,苯扎氯铵0.01%,pH 6.5-8.0,凝胶制备工艺可行。酮咯酸氨丁三醇检测浓度在60.0-140.0μg/mL范围内线性关系良好（r^2=0.999 8）,平均回收率：99.7%（RSD=0.70%,n=9）。经加速试验和室温留样考察,其外观性状、pH、有关物质及含量等指标均无明显变化。结论该凝胶剂制备工艺简单,稳定性好,质量可控。