共查询到19条相似文献,搜索用时 109 毫秒
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基于目前订单品种多种多样、钢坯规格参差不齐以及生产节奏变化频繁的现状,提出了一种加热炉温度设定的自适应控制策略。自适应控制策略由板坯加热制度、加权平均算法及专家系统组成。首先根据炉内钢坯分布、板坯信息情况及温度加热制度,计算获得每块板坯在炉内实时位置的目标加热温度,然后通过加权平均算法和专家系统的温度优化补偿,计算给出加热炉各段目标温度设定值。该策略有效解决了加热炉多种钢坯混装、钢坯规格及生产节奏变化频繁时目标温度不能自动设定的问题,提高了加热炉的生产效率,节约了人工成本,并提高了钢坯的加热质量。 相似文献
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连轧用板坯(以下简称板坯)在加热炉内加热而产生的氧化铁皮已有十几年没有做过测量,一般都以理论烧损率2%来进行计算。实际上,板坯在加热炉内的烧损与钢种、板坯规格、燃料种类、加热时间等有很大关系。为了准确地确定板坯在加 相似文献
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利用MSC.Marc软件建立蓄热式加热炉内板坯三维温度场有限元计算模型。结合首钢中厚板轧钢厂加热炉实际生产情况,模拟计算板坯加热过程中温度场的情况。根据板坯温度“黑匣子”试验结果,验证了模型计算结果的准确性,为研究加热工艺对板坯温度场影响、优化板坯加热温度制度提供了科学依据。 相似文献
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宝钢热轧4号加热炉传热模型的参数确定 总被引:6,自引:0,他引:6
根据宝钢热轧4号加热炉数模调试阶段的经验,总结了板坯传热模型参数确定的过程和方法。埋偶实验是整个模型参数确定的基础,它收集了模型参数确定的必要实际现场数据;板坯传热模型中的炉内温度模式确定了炉内的温度分布情况;热吸收系数φcg的值是进行板坯加热计算升温的最重要参数,它主要由加热炉的炉型和炉况决定,而水印温度的计算和控制可以更好地跟踪和控制加热质量。 相似文献
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加热炉内钢坯氧化烧损影响因素分析 总被引:1,自引:0,他引:1
钢坯加热过程中的氧化烧损一直是钢铁企业十分关注的问题。氧化烧损的出现不仅降低了钢坯的导热系数进而降低了加热炉效率而且影响了出炉钢坯的质量,带来了巨大的经济损失。以某钢厂步进式加热炉加热普碳钢为例,从加热温度、加热时间、炉内气氛、闷炉、热装这5个方面来分析钢坯氧化烧损影响因素并给出建设性意见,为后续的技术改进提供参考依据。 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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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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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,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,并提出了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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