煤炭法烘烤罐式煅烧炉

我国传统的罐式煅烧炉是采用煤气方法烘炉,需投资兴建煤气发生装置,拉入正常运行后基本闲置。文中用煤炭法烘炉实践论证了此法在技术上的可行性,讨论了本法同煤气法烘炉的优缺点以及负压、温度制度的改变对升温曲线的调整。本文还重点介绍了煤炭烘炉所用小炉灶技术     

浅议罐式煅烧炉烟气热量的利用

介绍了罐式煅烧炉烟气余热利用的一种方法,热平衡计算及余热利用的效果。     

罐式煅烧炉煤炭快速启动新技术开发及应用

罐式煅烧炉（简称炉）的使用寿命与炉的设计、筑炉质量、炉启动和正常生产工艺条件有关,兰州铝业股份有限公司的炉寿命达到11年,是把影响炉寿命的上述几个因素优化的结果。详细介绍炉煤炭快速启动新技术和采用该技术取得的可观的经济效益。因此,推广该技术具有良好的前景即具有良好的社会效益。     

硅砖罐式煅烧炉烘炉保温点的确定和控制

罐式煅烧炉是碳素生产中的关键设备之一，罐式煅烧炉的烘炉又是影响炉体使用寿命和生产操作的重要因素。自５０年代起，一直延用硅晶型转化点即α、β、γ的转化点来确定烘炉的保温点，但罐式煅烧炉一般没有五层至八层的火道结构，很难确定准确的晶型转化温度。本文提出了以炉体纵向膨胀量来确定保温点并控制开温速度。     

不外加燃料八层火道罐式煅烧炉设计与实践

综述了我国罐式炉实现不外加燃料煅烧的基本情况,提出了实现不外加燃料煅烧的理论公式,即挥发份需要量及挥发份生成量与原料中挥发份含量的线性方程,阐述了罐式炉不外加燃料煅烧的理论基础。     

罐式煅烧炉煅后焦质量的影响因素及改进措施

文章对影响罐式煅烧炉煅后焦质量的因素进行了深入分析,并结合中国铝业股份有限公司山东分公司煅烧生产实际提出了改进措施。措施实施后,取得了良好的效果。     

罐式煅烧炉热平衡测试与分析

摘要:为了研究罐式煅烧炉热工特性,了解罐式炉实际运行状况,需要对其进行全面的热平衡测试。重点介绍了罐式炉热平衡测试平台、热收入项和热支出项的计算方法。结合国内某厂新建罐式煅烧炉的热平衡测试与分析,得到各个具体的生产运行参数,这对评价操作参数合理性,提升对罐式炉的认知和操作水平,以及对罐式炉的生产和管理都具有指导意义。     

罐式煅烧炉烘炉保温点的确定与控制

针对山西华圣铝业有限公司采用的32罐顺流式燃烧炉,在烘炉过程中硅砖晶型转化和炉体体积变化的有效控制进行了阐述,同时对国内的铝用炭素罐式煅烧炉烘炉状况做了简单介绍,并指出了炭素大型罐式煅烧炉烘炉温度控制的消化利用.     

罐式煅烧炉的烘炉

３号罐式煅烧炉中６层火道改造为８层火道。根据测试的硅砖各温度区间的线膨胀率制定烘炉升温曲线。烘炉过程,严格按升温曲线控制升温速度,同时及时调整负坟和弹簧压力。烘炉实际升温曲线及炉体膨胀量与理论计算基本相符。转入生产后,排料正常,煅后焦真比重均在２．０ｇ／ｃｍ＾３以上。     

加强管理延长罐式炉寿命

对１０台罐式炉的炉龄进行了分析,指出了罐式炉管理中存在的问题,并提出改进意见。     

对气态悬浮焙烧炉的优化改进

本文对引进丹麦smith公司的气态悬浮焙烧炉(GSC)投入生产运行后存在的故障频繁、运转率低、热耗高、产能低、指标不稳定等问题的原因进行了详细的分析．通过理论上的探讨和实验，针对性地阐述了强化炉体密封，减少系统漏风；PO1中心管延长；掺烧、改烧焦炉煤气；改变炉体内衬结构．减少热损失，以达到稳定焙烧炉运行，提高产量，降低消耗之目的。同时对炉型进行优化．使之更加完善、适应氧化铝生产需要。     

Effect of workpiece sulphur content on the degradation of a PCBN tool material

Tool degradation may be significantly different depending on small variations in chemical compositions of the workpiece material. The present study is an in-depth microstructure investigation of worn low content polycrystalline cubic boron nitride tool materials after dry hard turning of steels with low and high sulphur contents. The results illustrate the important role of sulphur content on the degradation of the crater zone. Sulphides tend to adhere on the wear surface and form layers that protect the tool from workpiece ingress. In the absence of sulphides in the workpiece material, no protective layer can form and iron compounds make their way into the tool microstructure already at lower cutting speeds (150 m/min) and preferably attack cBN grains compared to Ti(C,N) grains.     

Effect of workpiece sulphur content on the degradation of a PCBN tool material

Tool degradation may be significantly different depending on small variations in chemical compositions of the workpiece material. The present study is an in-depth microstructure investigation of worn low content polycrystalline cubic boron nitride tool materials after dry hard turning of steels with low and high sulphur contents. The results illustrate the important role of sulphur content on the degradation of the crater zone. Sulphides tend to adhere on the wear surface and form layers that protect the tool from workpiece ingress. In the absence of sulphides in the workpiece material, no protective layer can form and iron compounds make their way into the tool microstructure already at lower cutting speeds (150 m/min) and preferably attack cBN grains compared to Ti(C,N) grains.     

The influence of carbon particles on the corrosion of iron in a humid,sulphur dioxide-containing atmosphere

Iron samples covered with a thin layer of activated carbon have been exposed to humid atmospheres at various relative humidities and with a various sulfur dioxide contents. Contrary to expectation the corrosion is initially faster at 55 and 65% relative humidity that at higher humidities. This phenomenon is attributed to adsorption of water vapour on activated charcoal, so that liquid films giving rise to corrosion can be formed at an earlier stage. After extended exposure, however, no accelerating effect can be attributed to the carbon particles.     

回转床煅烧炉煅烧针状石油焦

介绍回转床煅烧炉煅烧针状焦的工艺流程、工艺控制条件的优化及煅烧针状石油焦的产品质量指标。     

The influence of chromium content on the electrochemical behavior of weathering steels

To investigate the influence of chromium content on corrosion characteristics of weathering steels, the electrochemical measurements were performed on the steels containing 0–9% Cr (wt.%) in NaHSO₃ aqueous solution. The results indicated that the open circuit potential of these steels shifted to the positive direction remarkably, because the additions of Cr improved the passivation capability of the steels. The corrosion current density of the steels containing more than 7% Cr (wt.%) decreased significantly after pre-rusted treatment, implying the corrosion resistance could be enhanced by the formation of protective goethite rust layer.     

The influence of silicon content on microstructure and hardness of Mo-Si alloys

Mo-Si alloy sheets with different silicon content were fabricated by powder-metallurgical and thermo-mechanically processing. The effect of Si content and annealing temperature on microstructure and hardness of the Mo-Si alloys were studied by using optical microscopy (OM), transmission electron microscopy (TEM) and Vickers hardness tester, respectively. The results indicated that the presence of Si can effectively refine the grain sizes and improve the hardness of Mo-Si alloys. Si can also increase the recrystallization temperature of alloys and play a significant role in restraining the grain growth at high temperatures. Increasing the annealing temperature, the microstructure of Mo-Si alloy sheets is gradually coarsened and changed from fibrous to equiaxed structure, causing reduction in hardness. The hardening effect in the Mo-Si alloys came from the refined grain strengthening, solid solution strengthening, and second phase particle strengthening, which are closely dependent on the Si content and annealing temperature.