共查询到20条相似文献,搜索用时 109 毫秒
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在现代轧钢车间里,环形加热炉得到广泛的应用。特别是热轧无缝钢管车间,环形加热炉成了主要的加热设备。我国新建和改建的热轧无缝钢管车间,都选择了环形加热炉。 一、环形齿条-锥齿轮传动装置和液压传动装置 目前环形加热炉的炉底传动装置分为环形齿条-锥齿轮传动和液压传动两种。 环形齿条-锥齿轮传动,是电机经减速器,通过圆锥齿轮,驱动安装在炉底上的铸 相似文献
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结合某厂25m环形炉工程对环形炉设计做了简要的介绍,对环形炉炉底机械结构特点进行了阐述,并对主要构件给出了设计计算方法。 相似文献
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根据近年来武钢2座大型高炉破损调查的资料,分析炉缸、炉底耐火材料破损的特征和原因。炉缸、炉底产生环形裂缝的主要原因是碱金属和锌的侵蚀,重点讨论锌对产生环形裂缝的影响。基于对炉衬侵蚀机理的分析,提出了能满足炉缸、炉底长寿要求的适宜的耐火材料。用于炉缸、炉底的耐火材料应具备导热率高、微孔或超微孔、抗铁水渗透性好和抗铁水熔蚀性好等性能。 相似文献
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新型环形加热炉炉底机械支撑、定位、传动系统是一种全新结构,它优化了之前的支撑轮支撑结构和齿轮齿条传动结构,使炉子朝着重型、大型化方向发展,并大大提高了炉子的生产能力和成材率. 相似文献
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分析了某钢管厂在调试过程中的环形炉炉底机械托辊产生异响的原因,对炉底机械的托辊定位进行了适当的调整,从而消除了托辊在调试运行过程中产生的异常声响,使问题得到解决。 相似文献
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对衡阳钢管(集团)有限公司12 m环形炉炉底磨炉墙的原因进行了分析,并采取了相应的改进措施,取得了较好的实用效果. 相似文献
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针对炉底机械的结构组成进行了介绍,对支撑辊和传动装置的设计计算进行了理论分析,利用VC++编制程序进行辅助设计,提高了设计效率,通过实例分析验证了炉底机械设计分析的正确性。 相似文献
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从炉缸结构设计关键要素的分析着手,从侵蚀机制、炉缸传热体系的建立到炉缸的设计理念对炉缸的长寿 进行了全面的论述。指出高炉长寿的关键控制环节为:设计、施工、烘炉、开炉节奏、操作稳定、维护管理。在合适 的炉缸冷却系统和结构配置条件下,有效杜绝和防止气隙是炉缸长寿的关键。设计要有完善的防止气隙的措施; 安装中要严格控制每一个环节;采用热水烘炉提高炉墙温度,促进水分蒸发;控制高炉开炉进程,给予新高炉一个 磨合期,保证炉缸的传热体系可靠、有效,以实现炉缸的无气隙化操作。无论炉缸耐材采用何种配置结构和采用何 种冷却系统,都必须以建立良好的传热体系为前提,只有尽快形成稳定的渣铁壳,才能实现炉缸的长寿。 相似文献
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分析了高炉炉缸损坏的机制,认为现代高炉造成炉缸烧穿的关键因素是液态渣铁流动的机械冲刷。当前,炉缸烧穿的主要原因是炭砖的铁水熔蚀指数过高。延长炉缸寿命的关键在于耐火材料质量的突破。 相似文献
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Sung Sil Park Nurzhan Dyussekenov H.Y. Sohn 《Metallurgical and Materials Transactions B》2010,41(1):51-62
The top-blow injection technique of a gas–solid mixture through a circular lance is used in the Mitsubishi Continuous Smelting
Process. One of the inherent problems associated with this injection is the severe erosion of the hearth refractory below
the lances. A new configuration of the lance to form an annular gas–solid jet rather than a circular jet was designed in the
laboratory scale. With this new configuration, solid particles leave the lance at a much lower velocity than the gas, and
the penetration behavior of the jet is significantly different than with the circular lance in which the solid particles leave
the lance at the same high velocity as the gas. The results of cold model tests using an air-sand jet issuing from a circular
lance and an annular lance into a water bath showed that the penetration of the annular jet is much less sensitive to the
variations in particle feed rate as well as gas velocity than that of the circular jet. Correlation equations for the penetration
depth for both circular and annular jets show agreement among the experimentally obtained values. 相似文献
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In this paper, according to the characteristics of large load and uneven distribution of upper wall, large jacking height and high requirements for synchronous jacking precision in the separation process of the upper and lower wall of WK-35 electric excavator,a large-scale mining equipment in the mine, a hydraulic synchronous jacking method with four-point uneven load is proposed, which combines with the fuzzy PID control method which is suitable for nonlinear and time-varying complex system control to realize the synchronous jacking of excavator. Based on the synchronous jacking hydraulic system of WK-35 electric excavator, a simulation model of AMESim hydraulic system is built for dynamic simulation. The analysis results show that the changes of different loads only affected the piston velocity or oil velocity of the hydraulic cylinder in the final stable state. Both the balance control valve and the throttle speed control valve can quickly reach the stable state within 0~1s, which is conducive to better response performance when the hydraulic system enters the steady state. 相似文献