共查询到20条相似文献,搜索用时 62 毫秒
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干熄焦技术是近代发展起来的熄焦工艺,具有节约能源、焦碳质量好、环境污染小等优点。从70年代开始大量推广使用。苏联和日本走在干熄焦技术的前列。我国引进的干熄焦工程运行状况良好,但也存在着在库量控制失调等问题。针对这些问题开展研究,建立的干熄炉在库量控制系统获得成功,大大提高了控制水平,取得了较好的经济效益和社会效益。为干熄焦技术走向热蒸汽率最大化的先进目标奠定了基础。 相似文献
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本文主要对LF钢包精炼炉进行了介绍,阐述了LF钢包精炼炉脱硫工艺,以及影响脱硫的主要因素。并从渣量控制、渣况判断及渣性控制、节奏调整等方面进行了系统的阐述。 相似文献
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彭爱春 《冶金设备管理与维修》2010,(6):6-8
介绍了热连轧机活套控制理论和力矩的计算及控制方式,经不断调整。优化和改善动态参数,实现了活套高度自动控制,排除了拉钢堆钢现象,提高了产品质量。 相似文献
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铝电解过程中,每日出铝量、氟化铝添加量的决策对铝电解过程温度和过热度的准确控制非常重要,是影响铝电解技术经济指标的重要因素之一。本文基于广义动态模糊神经网络算法(GD-FNN),构造了铝电解预测系统,在给定铝电解槽所需温度之后,对铝电解中的出铝量和氟化铝添加量进行预测。此算法通过对高电流效率、低能耗的电解槽的运行规律进行自适应分析,训练出对应的决策规则,运用到效率低的电解槽,可以实现铝电解槽温度和过热度控制,提高铝电解电流效率。通过对某铝电解厂实际数据进行仿真实验,证明了该算法在铝电解控制中的有效性。 相似文献
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肖明理 《稀有金属与硬质合金》1998,(3):25-30
对金属钠溶液的多种计量控制方法进行了分析研究,结果表明:采用电阻法来控制注销量及注钠速度,方法不仅经济、实用,而且灵敏度高。该法不仅可以解决国内一些钽粉生产厂家因注销计量控制不灵敏而引起的袒粉质量问题,而且还可以用于其他导电液的计量控制。 相似文献
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本文介绍了最大电力需量控制系统的组成及控制方式,某公司电力需量控制由原人工控制改造为自动控制系统后,节约了较大的电力成本。 相似文献
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Michaels Claire F.; Jacobs David M.; Bongers Raoul M. 《Canadian Metallurgical Quarterly》2006,32(2):459
D. M. Jacobs and C. F. Michaels (2006) concluded that aspects of hand movements in lateral catching were predicted by the ratio of lateral optical velocity to expansion velocity. Their conclusions were based partly on a modified version of the required velocity model of catching (C. E. Peper, R. J. Bootsma, D. R. Mestre, & F. C. Bakker, 1994). The present article considers this optical ratio in detail and asks whether it, together with a control law, predicts the (often curious) hand trajectories observed in lateral interception. The optical ratio was used to create a succession of target-position inputs for the vector integration to endpoint model of hand movements (D. Bullock & S. Grossberg, 1988). The model used this succession, initial hand position, and model parameters (fit to 60 trials) to predict hand trajectories on each trial. Predicted trajectories were then compared with observed hand trajectories. Hand movements were predicted accurately, especially in the binocular condition, and were superior to predictions based on lateral ball position, the input variable of the required velocity model. The authors concluded, as did C. E. Peper et al. (1994), that perceivers continuously couple movements to optics. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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为解决临钢连铸旋流井容积小、液体温度高、杂质多等问题,应用PLC和变频器等电控集成技术改造原系统,并开发了数字浮筒式液位计,改造后的系统有效解决了原生产难题,可为其他领域的应用提供参考。 相似文献
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本文通过大体积砼裂缝成因的理论分析,提出了合理的裂缝控制的施工措施以及对巳有裂缝采取的处理方法。 相似文献
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工程项目竣工结算审核是竣工结算阶段一项重要技术经济工作。经审核的竣工结算是核定工程造价的依据,也是工程项目验收后核定新固定资产价值的依据。做好建设工程竣工结算的审核工作,能有效的控制工程造价,节省建设项目资金,保证建筑产品的价值真实性,在满足社会对实体建筑工程需求的同时,维护了建筑市场体制的健康发展。 相似文献
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文章论述了带材冷轧机厚度自动控制系统AGC(automatic gap control)的几种控制方式和特点,着重论述了恒体积流的控制系统组成和数学模型,阐述了以工控机和PLC为核心的两种恒体积流控制系统的硬件组成,主要强调了恒体积流在厚度控制系统中的信号采集以及工作原理。 相似文献
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钢铁业原、燃大宗物料是生产主要成本,物料的收、发、存数据动态跟踪管理对指导生产经营有着指导意义,因而迫切需要快速、准确地测出各种物料的库存量,有利于控制物料采购量、降低大宗物料资金占用率,对科学决策和提升经济效益有着重要意义.提高钢铁企业大宗原燃料盘库的准确性,是困扰钢铁行业多年的难题,文章以常规盘点方式,探讨大宗物料体积测定发展方向. 相似文献
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Masanori Iwase Alexander McLean Ken Katogi Yoshiteru Kikuchi Kazumasa Wakimoto 《国际钢铁研究》2005,76(4):296-305
One of the greatest obstacles to the application of physical chemistry principles to the elucidation of slag‐metal reactions is a lack of knowledge of activities of the reacting species. To a large extent, oxygen potential of the slag phase governs iron and steelmaking practice. Without oxygen control by means of appropriate sensors, the behaviour of the other elements cannot be managed. In this paper, measurements of the FeO activity with various types of electrochemical FeO sensors will be described together with examples of their applications for improved strategies toward better practice for ladle metallurgy and sulphur and manganese distributions between slag and metal phases during steelmaking. Measurements of FeO activity have also been made in order to improve dephosphorization reactions. This type of work has led to significant reduction in volume of slag generated within the steelmaking vessel, which in turn, has important implications for refractory wear, metal yield, alloy recovery and improved productivity. Finally an on‐line sensor is described which permits the oxygen potential to be determined for both the metal phase and the slag phase during steelmaking in the BOF. 相似文献