攀枝花74%品位钛渣熔盐氯化研究

开展了攀枝花74%品位钛渣熔盐氯化制备四氯化钛的试验研究,考察了74%品位钛渣作为氯化原料时,氯化炉温度控制、熔盐成分控制和产品质量情况,并对不同品位钛渣熔盐氯化时技术经济指标进行了对比分析。研究表明:使用攀枝花74%品位钛渣熔盐氯化生产高品质海绵钛用四氯化钛工艺可行,与采用78%钛渣熔盐氯化相比,每吨粗四氯化钛可节约成本98.3元。     

碳化攀钢高炉渣低温选择氯化的热力学分析

从热力学角度对碳化攀钢高炉渣的氯化反应进行了分析，指出氧气参与氯化反应是保证实现TiC选择性氯化的重要条件，不仅可降低氯气的耗量，而且对解决氯化残渣的出路有重要意义。对碳化渣低温氯化和高钛渣高温加碳氯化的热平衡进行了计算和比较，指出解决大型氯化设备上的热平衡和局部过热以及氯化反应的可控制性是决定碳化渣低温氯化成败的关键所在。     

含金重砂水相氯化液——液萃取提金

近年来,水相氯化法引起了人们的注意。我们曾对水相氯化含金重砂提金的方法做了一些探讨,现简介如下: (一)水相氯化1.王水氯化。取含金重砂按固液比1:1的比例加入浓盐酸,煮沸4～6小时,如此返复二次,以     

MIBK萃取分离铪钛的影响因素研究

采用MIBK萃取剂在硫氰酸盐介质中对铪、钛进行萃取分离,考察水相NH4SCN浓度、水相酸度、有机相中HSCN预饱和浓度、相比、时间等对铪、钛分配比和分离系数的影响。结果表明,优化工艺为:NH4SCN浓度1.0 mol/L、水相酸度1.0 mol/L、有机相不经HSCN预饱和、相比1.5∶1、萃取时间7min。铪、钛分配比分别达到18.20和0.16,铪、钛分离系数达到107。     

攀枝花钛渣熔盐氯化特性研究

开展了攀枝花74%品位钛渣、78%钛渣和85%钛渣的化学成分、物相及矿物结构研究,考察了三种钛渣熔盐氯化时反应差异、放热量差异和氯化系统热平衡控制差异。研究表明:74%渣、78%渣和85%渣在物相组成上无较大差异,但黑钛石、金红石及其过渡相含量存在差异,导致74%渣熔盐氯化放热量比78%渣多21.9%、85%渣熔盐氯化放热量比78%渣少9.9%,氯化炉热平衡计算所需的返炉矿浆量与实际氯化应用所需矿浆量结果一致。     

不同品位高钛渣对沸腾氯化工艺的影响

分别以94％品位高钛渣和90％品位高钛渣为原料，采用沸腾氯化工艺制备粗TiCl4，分析了两种品位高钛渣对沸腾氯化工艺的影响。结果表明：94％品位高钛渣由于其活性低而对沸腾氯化工艺的影响较大。     

含钛物料中钛的选择氯化法

本发明提供一种处理含钛物料（例如钛铁矿）的还原——氯化法。含钛物料氯化时,钛被选择氯化;而物料中的铁转变为氯化物的数量则为数不多。物料中其他一些金属,例如钒,则可能与钛一起被氯化。使用适量的含碳物料作为还原剂,其用量依含钛物料中的含氧量而定;至少 应是使含钛物料中的氧转化为一氧化碳所需要的化学计算量。选择氯化所用的氯化剂可以只用二氯化铁（FeCl_2）,或二氯化铁与一种或几种其他含氯物质结合使用;特别是与分子氯（Cl_2）和氯化氢（HCl）结合使用。选择氯化时,用三氯化铁（FeCl_3）作为氯化剂或充当一部分氯化剂,就相当于使用FeCl_2/0.5Cl_2的混合物。氯化剂最好能提供足够的氯原子,以便与含钛物料中几乎所有的钛反应。氯化过程中,温度应保持在950～1400℃,但这个温度范围取决于氯化剂的成分。在这个温度范围内,可以有一个最低温度,但必须保持其选择性。     

稀释氯气对钛渣沸腾氯化的影响

钛渣氯化使用稀释氯气是钛工业中实现镁氯循环封闭流程技术改造的重大课题之一。本文基于钛渣沸腾氯化过程使用不同浓度的稀释氯气(氯气-空气混合气体)的小型试验,探讨在沸腾氯化条件下氯气浓度、氯化时间对钛渣中TiO_2氯化率影响的变化规律。     

攀枝花钛矿富钛料氯化技术探讨

详细分析了攀枝花钛精矿的特点,氯化原料存在的问题以及各种氯化技术的原理、特点、技术经济指标.探讨了攀枝花富钛料的氯化工艺路线.     

云南高钛渣沸腾氯化生产粗TiCl4可行性探讨

分析了云南高钛渣的特点及沸腾氯化制取粗TiCl4的可行性。在有筛板沸腾氯化炉中进行了云南高钛渣沸氯化实验，表明含CaO、MgO量较高的云南高钛渣经沸腾氯化生产组TiCl4是可行的。     

国外氯化法钛白粉企业产业结构分析

对国外氯化法钛白粉企业的生产基地、产能情况、产业链配套、原料结构、运行情况、竞争优势等进行分析,纵览氯化法钛白粉企业百年发展史的成果,为国内新建氯化法钛白粉企业提供产业结构发展思路。国内氯化法钛白粉企业应加快对技术的消化吸收再创新,重点关注可氯化富钛料的获取,掌握优质的钛矿资源。     

莱钢3″105m^2烧结机主传动大齿轮无键连接技术

详细介绍了3#105m2烧结机悬挂减速机大齿轮无键连接的安装要点、安装方法、安装顺序和质量控制.     

供氧体在金溶解过程中的作用研究

本文提出供氧体的概念。认为供氧体在溶解金的过程中起着非常重要的作用。指出了用气体供氧体的缺陷，固体和液体供氧体的特点，以及需要严格控制供氧体的用量。     

Estimation of Diffusion Coefficients and Solubilities for Organic Solvents Permeation through High-Density Polyethylene Geomembrane

Experiments on the permeation of several chlorinated and aromatic hydrocarbons through high-density polyethylene (HDPE) geomembranes were conducted using the ASTM F-739 standard test method. The diffusion coefficients were estimated by a one-dimensional diffusion equation based on Fick’s second law, and the solubilities of the solvents in HDPE were determined by the steady state permeation rates. The one-dimensional transient model was able to simulate the permeation concentrations and implied that equilibrium partition between organic solvent and HDPE geomembrane was not achieved during the initial permeation. The solubilities of organic solvents in the HDPE geomembranes obtained by immersion tests or weight gain methods of permeation experiments were not an appropriate boundary condition for the model simulation of permeation. It was found that the diffusion coefficients and solubilities of organic solvents correlated well with their molecular weights and dipole moment, respectively. The present work provides information on the extent of organic compounds permeations through HDPE geomembranes as applied in hazardous waste landfills.     

关于沸腾氯化炉的散热与保温

提出沸腾氯化炉的保温对沸腾氯化生产的作用,阐述沸腾炉四氯化钛生产中,热量在不同阶段的特点及处理方法。合理地利用与处理沸腾氯化炉产生的热量,使之达到对沸腾氯化生产各相关环节有利的目的。该方法对大型沸腾氯化炉内相应床层的建立是有利的,有利于在相对短的时间内建立较为良好的炉况。     

Ti-Si Interactions in liquid iron

An assessment of the interactions between titanium and silicon in liquid iron was carried out using published phase equilibria measurements in the Fe C-Si-Ti system. It is shown that a cluster model can describe the experimental results reasonably well. The assessment suggests that silicon decreases the activity of titanium in liquid iron.     

板坯连铸涡流检测钢水液位系统的应用

介绍了新一代RAM型涡流传感钢水液位控制仪在莱钢板坯连铸机上的应用及其效果。     

Wear analysis of a retrieved hip implant with titanium nitride coating

There is increasing interest in using surface modification technology to improve the wear properties of titanium alloy and limit articular surface wear of metal and polyethylene components. This report details the in vivo wear performance of titanium nitride coating on a retrieved hip implant obtained postmortem from a low demand patient 1 year after total hip arthroplasty. Analysis of the well-functioning implant revealed that wear debris can originate from a titanium nitride coated femoral head, as delaminated surface asperities, and manifest as adhesive wear on the articular surface. The wear observed on this implant indicates that rigorous testing and evaluation of titanium nitride coating technology should be conducted prior to widespread use on total joint implants.     

Stability of mycophenolate mofetil in an extemporaneously compounded oral liquid

The stability of mycophenolate mofetil in an extemporaneously prepared 100-mg/mL oral liquid was studied. The contents of 80 250-mg capsules of mycophenolate mofetil were combined with sterile water for irrigation and cherry-flavored syrup to produce 200 mL of suspension. Six 1-mL samples were analyzed immediately, and the rest of the suspension was poured into 12 2-oz amber polyethylene terephthalate [corrected] G(PETG) bottles; six bottles were stored at 23-25 degrees C and six at 2-8 degrees C. Samples were removed on days 14, 21, 28, 35, 49, 63, 92, and 121 for analysis by high-performance liquid chromatography; pH was measured initially and at each sampling time. The pH of the suspension was initially 6.1 and remained unchanged throughout the study. The suspension retained more than 90% of its initial drug concentration for 121 days at 23-25 and 2-8 degrees C. There was no detectable change in color or odor and no visible microbial growth in any sample. Mycophenolate mofetil in a 100-mg/mL oral liquid prepared with cherry-flavored vehicle and stored in amber PETG bottles was stable for 121 days at 23-25 and 2-8 degrees C.