混捏、成型工序对碳阳极生块质量的影响

在炭素材料的生产过程中,为了使成品结构具有良好的均匀性,一般要求将配好的各种物料放在一定的设备中进行搅拌,使之达到均匀性。这种使骨料各种组分、各种粒度及粘结剂达到均匀混合,并得到可塑性糊料的工艺过程称为混捏。将混捏好的碳素糊料通过某种成型方法，使之成为具有一定形状、尺寸和密度制品的过程称为成型。它们都对碳阳极生块的质量有很大影响。     

交流变频调带技术在连续混捏机上的应用

介绍交流变频技术在碳素行业连续混捏机上的使用情况,说明变频技术在连续混捏机上应用的可行性、经济性及前景.     

交流变频调速技术在连续混捏机上的应用

介绍交流变频技术在碳素行业连续混捏机上的使用情况,说明变频技术在连续混捏机上应用的可行性、经济性及前景。     

铝用预焙阳极连续混捏新技术应用

本文概述了我国混捏技术发展历史及现状,介绍了我公司铝用预焙阳极连续混捏新技术的工艺特点和装备特点,对新技术涉及的强力高温混捏、强力冷却再混捏、混捏时间、系统弹性、原料适应性以及设备维修特性等做了分析研究,对新技术的成功应用做了验证分析,充分证明新技术的应用是经济的、可行性的先进技术,值得行业借签和推广。     

连续混捏机的结构、原理与维修

连续混捏机是生产铝用炭素制品的重要设备,本文对连续混捏机的结构组成、工作原理进行了阐述分析,并对其日常维修的措施及注意事项进行了总结归纳。     

大型电解铝阴极材料生产线投产

河北冀州市合力集团碳素制品二期工程的一座年产2.6万t电解铝阴极材料生产线建成投产,标志着我国自行设计的国内最大的电解铝阴极材料生产基地建设成功。 河北翼州市合力集团是我国生产碳素制品的骨干厂家。近年来,随着企业的发展,这家公司始终坚持以技术创新带动产品创新,开发出了拥有国家专利技术的新型电解铝用大型燕尾槽炭块新产品,并形成上百个规格型号品种。     

洛阳震动机械有限公司

洛阳震动机械有限公司专业生产炭素机械设备,共有两大项八大类20多种产品,共获省级科技奖3项,市级5项。专利17项,获部优产品1个,省优产品3个,2个高新技术产品。公司已通过ISO9001国际质量体系认证。2008年建立了“洛阳市碳素机械设备工程技术研究中心”。生产的阴、阳级炭块成型机占国内同类产品市场的70％以上,还有与其配套的混捏锅,冷却输送机、非标振动台、吸料天车、生阳极编组机组、焙烧阳极解组清理机组、阴极碳块加工成套机组、阳极组装线成套设备等炭素机械设备,     

洛阳震动机械有限公司

洛阳震动机械有限公司专业生产炭素机械设备，共有两大项八大类20多种产品，共获省级科技奖3项，市级5项，专利17项。获部优产品1个，省优产品3个，2个高新技术产品。公司已通过ISO9001国际质量体系认证。2008年建立了“洛阳市碳素机械设备工程技术研究中心”。生产的阴、阳级炭块成型机占国内同类产品市场的70％以上，还有与其配套的混捏锅，冷却输送机、非标振动台、吸料天车、生阳极编组机组、焙烧阳极解组清理机组、阴极碳块加工成套机组、阳极组装线成套设备等炭素机械设备，     

一次成型自带钢棒槽碳块节能效果显著

河北冀州市碳素制品有限责任公司研制开发出具有我国自主知识产权的电解铝用阴极材料——一次成型自带钢棒槽碳块新产品。产品不仅性能优越，而且节电效果显，已成为我国电解铝生产企业更新换代的理想产品。     

铝电解净化收尘灰与废焦油协同利用工艺技术研究

铝电解阳极块和阴极炭块生产过程中产生大量的净化废物收尘灰与废焦油。收尘灰固定碳含量超过85%,具有较高的二次资源利用价值；废焦油含多种无机和有机化合物，是一种易燃品，可用作燃料，还可用作碳素制品粘合剂及制备其他合成纤维的原料。本文研究一种收尘灰与废焦油协同利用制备型焦的工艺，以收尘灰为原料，利用废焦油和沥青为粘合剂，通过搅拌、混捏、压块成型，在高温电阻炉内焙烧，最后生成型焦。试验过程表明，该工艺生产的型焦能够达到预期的技术指标，型焦产品固定碳含量>96%,灰分<4%,硫含量<0.5%,可以用作炼钢厂优质增碳剂、其他金属冶炼还原剂或高热量燃料，实现电解铝固(危)废的高值化利用，对电解铝行业节能减排具有重要的意义。     

关于链箅机-回转窑系统耐火材料内衬的长寿化

针对回转窑窑体、预热段、环冷机下侧墙、环冷机受料斗等部位的工况和特点,相应开发出了抗结圈料、窑口专用料、抗冲刷砖、砖料复合网状砌筑结构和砖料混合砌筑结构等一批耐火材料新产品、新技术。这些产品和技术的应用,为链箅机-回转窑氧化球团生产系统耐火材料的长寿化奠定了基础。此外,科学的操作和维护也是实现链箅机-回转窑耐火材料长寿化的必要措施。     

Preparation and emission property of scandia pressed cathode

Scandia pressed cathodes were prepared by powder metallurgy method using mixed powder of scandia doped tungsten and barium-calcium aluminates obtained by different mixing methods.The element distribution uniformity greatly affected the emission property.The powder prepared by ball-milling had small particle size and uniform distribution of different elements.This kind of powder was favorable for the chemical reaction among Ba,Ca aluminates,scandia and tungsten to take place sufficiently to form active substance which can improve the emission property.The emission current density of the cathode prepared with ball-milling powder was about 8 times higher than that prepared by manually mixing method,4 times higher than Os coated M-type cathode.The higher content of the active substance on the cathode surface prepared by ball-milling led to the better emission performance of the cathode.     

湘钢烧结机(105 m2)主要工艺及设备特点

介绍了湘潭钢铁公司二烧二期105 m2烧结机的工艺和设备特点,主要包括燃料预筛分、自动称量配料、延长混合制粒时间、厚料层烧结、幕帘式点火器、完善的整粒系统以及混合制粒机、105 m2烧结机、126 m2鼓风带冷机.     

Reduction of Mixing in Jet-Fed Water Storage Tanks

Contrary to usual mains-water practice, mixing in water storage tanks used in rainwater harvesting systems is undesirable because pathogen die-off can occur in the unmixed water prior to its extraction for use. The principal cause of mixing in these tanks is the momentum of the inflow during a rainfall event. We investigate the effect of inflow-jet configuration on the proportion of stored water in a tank which mixes with the slightly cooler inflow of rooftop water. Scale experiments are conducted which show that the nondimensional height of the mixing front above the jet inlet is proportional to the inflow-jet densimetric Froude number for both single and multijet arrangements of various geometries. For each arrangement a coefficient of mixing is found. The results are then used to assess the level of mixing in full-scale rooftop rainwater harvesting storage tanks and determine whether residence time in such tanks is a viable strategy for pathogen reduction. For such applications, a radial manifold of jets outwardly directed from the tank center is found to be the most promising.     

正极材料LiNi1/3Co1/3Mn1/3O2的Mg掺杂及电化学性能

为提高正极材料LiNi_1/3Co_1/3Mn_1/3O₂的循环性能, 采用氢氧化物共沉淀法对前驱体进行Mg掺杂, 再经过混锂、球磨、高温煅烧后, 分别对掺杂与未掺杂的正极材料进行了XRD、SEM及电化学性能的比较.研究结果表明:掺杂与未掺杂的正极材料都为标准的α-NaFeO₂型层状结构, 粒度大小无明显变化; 对于掺杂量为0.03与未掺杂的正极材料, 首轮放电比容量分别为138.2 mAh/g和145.3 mAh/g; 而循环50轮的放电比容量则分别为131.1 mAh/g和119.5 mAh/g.由此可见, 通过Mg掺杂, 正极材料的首轮放电比容量虽有少量降低, 而循环性能却有明显增强.      

Electrochemical Reactivation of Granular Activated Carbon: Effect of Electrolyte Mixing

Bench-scale experiments investigated the effect of electrolyte mixing on the effectiveness of an electrochemical reactor for the reactivation of granular activated carbon (GAC). Two different GACs (F-400 and WV-B) were loaded with phenol via batch adsorption tests, then electrochemically reactivated and finally reloaded with phenol. Reactivation was conducted in a recirculating flow reactor with a 0.1?M NaCl solution as the electrolyte. Cathodic reactivation was more efficient than the anodic reactivation and increasing the degree of electrolyte mixing decreased the cathodic reactivation efficiencies, while there was no significant change in the anodic reactivation efficiencies. Higher degrees of electrolyte mixing decreased the local pH at the cathode and consequently reduced the desorption driving force and therefore reduced the reactivation efficiency. The electrolyte mixing lowered the cell voltage. However, this advantage was overshadowed by the increased energy consumption required for the electrolyte pumping, the reduction of the oxidation rate of phenol, and a 20% reduction in the reactivation efficiencies. Thus, electrolyte mixing of the electrolyte is not recommended in the electrochemical reactivation of GAC.     

PT-I型球团矿炉外冷却器的设计研究

叙述了我国球团矿炉外冷却器的应用现状 ,提出了其存在的问题 ,并介绍了一种可用来代替目前竖炉球团炉外冷却器的新型 PT-I RA型冷却器的、冷却原理及应用前景     

冷却水污垢及其对冷却器换热的影响

分析了冷却器的结垢机理 ,提出了冷却器污垢层、污垢热阻随运行时间的规律 ,以及污垢热阻与换热系数、换热面积的关系式 ,并通过算例阐述了污垢热阻对冷却器的影响程度 ,进而定性地分析了污垢热阻对空分装置的影响。     

The refractory lining of blast furnaces and modernization of their cooling system

Copper coolers of a special design were developed by the companies Mechel and Mi-Fi-Bu in 2002. A distinctive feature of the Mechel/Mi-Fi-Bu coolers is the presence of three water inlets in the lower part of the cooler and three outlets in the upper part. A standard cooler has three pairs of drilled channels (for inlet and outlet tubes). Projections are welded on the outside surface of the body of the cooler at the same locations as the bolts to maintain the required gap between the cooler and the shell of the blast furnace. __________ Translated from Metallurg, No. 7, pp. 34–40, July, 2006.     

底卸式环冷机热机耦合变形有限元分析

炼铁过程中,烧结矿的冷却及余热回收工艺主要依靠环冷机实现。烧结矿初入环冷机时温度可达520℃,经环冷机回转1周冷却后,温度降低至120℃以下。明显的温度梯度导致环冷机的不均匀热变形,严重时会引起运行失稳、卡轨等问题。因此,对常见的底卸式环冷机作业过程中的温度场及热机耦合变形的分析具有重要的工程意义。首先采用流场分析软件,对环冷机内烧结矿的冷却过程进行分析,将烧结矿温度场施加于环冷机有限元模型中,计算环冷机整体结构的温度场和热机耦合变形。为了验证有限元分析结果,对现场运行的环冷机表面温度场进行了实时测量,测量结果表明有限元的温度场分析结果较为准确。数值仿真结果表明,底卸式环冷机的整体温度较高,隔温效果差。由于鼓风冷却作用,温度自上至下呈递减趋势,同一高度上的局部区域内温度变化不大。环冷机热机耦合变形明显,最大变形发生于高温区的内圈侧轨处,总位移达到91 mm,水平位移达22 mm。底卸式环冷机的工作温度高,热变形明显,需要进行进一步的优化改进,实施更新换代。