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文章论述了顶吹氧电炉冶炼新工艺的技术特点、工艺流程、钢水终点状况和工艺指标.该工艺结合了电炉的电极加热技术和转炉的顶部吹氧技术,并采用了新装备以解决电炉冶炼原料结构多样的问题,更好地适应了大比例加入铁水的冶炼情况,为电炉冶炼提供了新思路. 相似文献
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国内大型圆形钛渣电炉多数采用间歇式生产冶炼工艺。通过电炉加料系统设备的改造、冶炼工艺的攻关、采用先进的神经网络控制方法等途径可实现钛渣电炉连续加料、连续冶炼的工艺。 相似文献
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本文介绍“电炉无还原冶炼普碳钢工艺”的试验概况、工艺流程、冶炼控制钢的质量和经济效果。试验得出:电炉采用“无还原工艺”冶炼普碳钢优于文中提到的其它二种工艺。 相似文献
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1.前言高功率电炉及EBT电炉的开发使电弧炉的发展产生了飞跃。但先进设备只有配以先进的工艺,才能更好的挖掘出设备的潜力,EBT炉为我们向传统冶炼工艺挑战创造了物质条件。为了创造更好的经济效益,我们采用了目前国内外较先进的冶炼工艺。2.电炉操作工艺简介(以轴承钢为例) 2.1 工艺流程 相似文献
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Consteel电炉具有连续加料、废钢预热、冶炼周期短、生产效率高、节省能耗、对电网干扰小、满足环保要求及设备投资省等特点,备受各钢铁企业的青睐。本文就福华轧钢有限公司70t Consteel超高功率电炉冶炼工艺的探讨分析,为Consteel电炉冶炼工艺操作提供借鉴。 相似文献
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分析了影响冶炼不锈钢的电炉炉龄的主要因素。通过选用高质量耐火材料,提高炉衬抗氧化和耐侵蚀性;采用约45%的铁水热装比优化配料模式,以及优化供电曲线以降低电能消耗;采用渣泡沫化技术改进造渣工艺等提高电炉炉龄综合控制技术,电炉炉龄明显提高。2008年平均炉龄为507炉,最高炉龄达到了790炉。电炉炉龄作为一项体现冶炼综合水平的指标,炉龄的提高表明电炉采用热装脱磷铁水冶炼不锈钢母液工艺日渐成熟。 相似文献
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直到六十年代中期,电炉还是冶炼特殊钢最主要的熔化和精炼设备。在电炉内可以产生氧化和还原条件,因此它不仅熔化炉料,还可以成功地进行所有必需的冶炼操作。在电炉钢厂,传统的特殊钢冶炼工艺几 相似文献
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TiAl合金的制备及应用现状 总被引:1,自引:0,他引:1
TiAl合金密度小、高温性能优异,自20世纪50年代以来已发展到第三代。介绍了TiAl合金的性能特点、发展历程,真空感应熔炼、真空自耗电弧熔炼、等离子冷床炉熔炼等熔炼TiAl合金方法的优缺点,以及国内外TiAl合金的制备情况;提出TiAl合金熔炼过程中存在的问题主要是宏观与微观偏析,应从原料加入方式、原料纯度及熔炼工艺等方面进行改进;此外,对TiAl合金在航空航天、汽车工业等领域的应用现状进行了概括,指出TiAl合金近期的研究重点是大尺寸铸锭的均匀化控制。 相似文献
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镁合金熔炼过程中的阻燃保护方法及进展 总被引:2,自引:0,他引:2
综述了镁合金熔炼过程中的熔剂保护、气体保护及合金化阻燃保护的研究现状及进展。熔剂保护和气体保护是目前国内外应用最为广泛的镁合金阻燃方法,但同时带来了环境污染等问题。研制经济、实用、无污染的镁合金熔炼保护方法将有利扩大镁合金的生产。 相似文献
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电子束冷床炉熔炼是一种新兴的金属精炼方法。利用电子束冷床炉的高温真空精炼特性,以钒成分为82%钒铝合金为原料,制备了纯度在99.7%以上的金属钒铸锭。详细论述了电子束冷床炉在熔炼钒铝合金时各杂质元素的去除机理行为,认为熔炼时较大的电子束照射功率对一次铸锭中铝的挥发去除有较好效果,但这种熔炼工艺却会影响到铸锭的最终氧含量。分析认为,两次小功率熔炼是符合设备特点的制备高纯金属钒铸锭的最佳熔炼工艺。 相似文献
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When melting processes are associated with an exothermic heat of mixing, unique coupled transport phenomena take place. In
this article, a mathematical model has been developed to simulate these unique coupled heat and mass transfer events. The
model was based on the control-volume finite difference approach and on an enthalpy method. In order to verify the mathematical
model, a low-temperature physical model was established consisting of ice and sulfuric acid solutions. In this physical model,
both temperature and velocity measurements were carried out. The model predictions were compared with experimental measurements,
and they were found to be in good agreement. The model was also applied to a high-temperature system, namely, the melting
of silicon metal in liquid high carbon iron. The predictions distinguished two periods present in the entire melting process.
In the first period, the silicon was heated up. The second period, i.e., free melting period, occurred in tandem with the exothermic reaction, and consequently, the melting process was greatly
accelerated. As was the case with the low-temperature physical model, as with the high-temperature system, good agreement
was obtained between the predicted results and the experimental measurements. 相似文献
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Rodney L. Williamson David K. Melgaard Gregory J. Shelmidine Joseph J. Beaman Robert Morrison 《Metallurgical and Materials Transactions B》2004,35(1):101-113
Vacuum arc remelting (VAR) is used widely throughout the specialty metals industry to produce superalloy and titanium alloy
cast ingots. Optimum VAR casting requires that the electrode melting rate be controlled at all times during the process. This
is especially difficult when process conditions are such that the temperature distribution in the electrode has not achieved,
or has been driven away from, steady state. This condition is encountered during the beginning and closing stages of the VAR
process, and also during some process disturbances such as when the melt zone passes through a transverse crack. To address
these transient melting situations, a new method of VAR melt rate control has been developed that incorporates an accurate,
low-order melting model to continually estimate the temperature distribution in the electrode. This method of model-based
control was tested at Carpenter Technology Corporation. In the first test, two 0.43-m-diameter alloy 718 electrodes were melted
into 0.51-m-diameter ingots. Aggressive start-up and hot-top procedures were used to test the dynamic capabilities of the
control technique. Additionally, a transverse cut was placed in each electrode with an abrasive saw to mimic an electrode
crack. Accurate melt rate control was demonstrated throughout each melt. The second test used an electrode size and grade
proprietary to the host company. Because it was not stress relieved after the primary casting process, the electrode was known
to possess multiple cracks that make accurate melt rate control impossible using standard VAR controller technology. This
electrode was also successfully melted with good melt rate control using the model-based controller. 相似文献