共查询到20条相似文献,搜索用时 31 毫秒
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讨论了两流薄板坯连铸连轧作业时铸坯在加热炉内的运动情况。分析了进入出坯段的铸坯的模式选择,进而确定铸坯进入平移段的时机。定义了加热炉综合进坯速度和加热炉平均出坯速度两个概念来讨论铸坯出坯的两种方案,并提出最小铸坯长度和最大加热炉综合进坯速度的计算公式。 相似文献
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对包钢引进的连铸设备的总体参数作了计算,确定了方坯和圆坯连铸设备的铸坯断面尺寸、冶金长度、拉坯速度、弧形半径。据此,对外商提供的参数进行综合分析和评估。 相似文献
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介绍了铸坯冷却过程及各环节的主要作用和影响铸坯冷却的原因,详细讨论影响铸坯质量的因素。 相似文献
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铸坯的内部质量主要取决于钢液的纯净度及铸坯的冷却状况和其支撑系统的几何条件。铸坯的表面温度是体现冷却状况的一个重要参数,特别是矫直点的温度控制将直接影响到铸坯质量。本文在科学试验的基础上,报告武钢二炼钢厂1号2号4号铸机的测温结果,结合相应的工艺参数和铸坯质量进行综合分析和讨论,从工艺方面提出提高铸坯质量的措施和建议。 相似文献
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本文分析了小方坯加铸提高拉速后出现的铸坯低倍组织缺陷,就其表现形式进行了统计分析和讨论,并且采取了相应的具体工艺改进措施,使高拉速方坯低倍缺陷大幅度降低。 相似文献
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A control system for tracing the reference reheating curves of individual steel slabs in continuous furnaces is presented. The system enables the predefined, controllable reheating of slabs in a furnace. The slab temperatures are obtained by the simulation of a mathematical model of the slab‐reheating process. The interior of the continuous furnace is divided into six control zones. The individual zone temperatures are adjusted by the control system in such a way that the temperatures of the slabs in the zone are as close as possible to the desired slab temperatures. To take into account delays in the production line and to synchronize the furnace with the rolling mill's capacities, a time shift of the reference reheating curves and a prolonged drop‐out interval are introduced. 相似文献
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根据工业纯钛的物理化学特性,对钛坯加热工艺进行探讨,并在现有步进梁式板坯加热炉上进行实践。通过实践得出:钛坯加热时,在低温段缓慢升温而高温段快速加热,可通过调整步进梁运行间隔时间来确保钛坯在各加热段上的加热时间满足工艺要求;为确保各段炉温满足钛坯加热工艺要求,加热过程中不使用预热段烧嘴;当钛坯运行到加热段后,加热段和均热段上的烧嘴全部打开确保炉内气氛呈微氧化性,烧嘴采用小流量燃烧控制;加热过程中烧嘴火焰不得接触钛坯表面。以上加热工艺通过现场实验,能满足板坯加热炉加热钛坯的工艺要求。 相似文献
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A three-dimensional heat transfer model considering various skid button heights for the prediction of the temperature history of steel slabs was performed in order to obtain the optimal heating pattern of these slabs with minimum energy consumption in a walking-beam type reheating furnace. An algorithm was developed using a simplified conjugated-gradient method combined with a shooting method and was used as an optimiser to design the furnace temperature distribution. The effect of the skid button heights on the design requirements, such as the energy consumption necessary for heating a slab, skid-mark temperature uniformity at the furnace exit and slab discharging temperature, was investigated. The parametric study results indicated that the skid-mark temperatures significantly decrease with increases in the skid button heights. In addition, the optimal designs suggested lower energy consumption for heating a slab and improved skid-mark temperature uniformity as compared to the original operating conditions in a steel plant. 相似文献
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