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基于马钢2 250mm热轧的设备、工艺及信息化系统条件,针对马钢2 250mm热轧生产线,根据不同的热送热装模式,制定了不同的生产组织计划方案,以提高热送热装的比例。 相似文献
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根据唐山钢铁公司生产实际 ,在试验的基础上 ,提出了连铸坯热送热装的保证措施 ,摸索出了棒材厂热送热装的工艺模式。 相似文献
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热装热送计划问题的解决方案 总被引:2,自引:0,他引:2
P.Knoop M.De Feyter L.V.Nerom 《钢铁》2006,41(1):58-61,70
热装热送要求连铸机和轧机的生产计划相匹配.介绍一种采用先进算法自动生成热装计划的新系统,根据产品大纲和市场条件,热装比可达85%.目前该系统正在中国-家钢铁企业进行测试,目标是达到80%的热装比.提高热装比需要炼钢和轧钢工序的密切协调,需要操作、维修和计划各个部门的全面配合. 相似文献
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连铸坯热送热装能利用自身热能降低轧钢加热炉的加热温度,减少加热时间,提高连铸坯热送热装率,有效减少煤气消耗,降低工序能耗,是衡量轧钢煤气消耗成本高低的重要指标。本文通过分析制约热送热装率提升的主要原因,并且通过优化工艺技术、加强设备维护、优化生产计划,2023年6月份连铸坯热送热装率比2022年提高13%,吨钢煤气耗降低24.2 m3/t,按煤气0.1元/m3计算,降低煤气成本2.42元/t。 相似文献
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针对攀钢连铸板坯热送热装生产现状,开发了板坯热送,加热过程数学模型,进行了铸坯生产组织方式及表面质量状况轧制前后对应关系的工业试验,在此基础上,建立了铸坯热送热装管理办法和加热炉操作规程。生产统计表明,铸坯热送热装率从1995年的16.7%提高到1996年的36.9%平均入炉温度达565℃。 相似文献
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基于延时Petri网的热送热装生产计划模型的建立与分析 总被引:1,自引:0,他引:1
应用延时Petri网对连铸-热轧生产过程进行了描述,建立生产计划模拟模型,并利用此模型对热送热装一体化生产计划进行模拟分析和计算,得到了满意的结果。 相似文献
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阐述了带钢厂实施热装热送有利条件,生产组织管理的特点、1999年热装与冷装技经指标对比和热装热送效益情况。 相似文献
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阐述了钢铁企业热轧能耗的状况、能耗的影响因素和改进的方向。着重论述了科学化、智能化和模型化在热送热装领域的发展以及广阔的前景。 相似文献
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本文从紧凑式轧机的轧制变形特点出发,分析了其变形规程设计的主要特点和方法,讨论了限制其道次变形量的基本因素,给出了优化设计的目标函数和约束条件。指出,类似这种具有复杂约束的轧制变形问题采用混合罚函数法处理更为有效,并成功地采用该方法进行了变形规程的试设定。 相似文献
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Control of protein synthesis by hemin. Isolation and characterization of a supernatant factor from rabbit reticulocyte lysate 总被引:1,自引:0,他引:1
M Gross 《Canadian Metallurgical Quarterly》1976,447(4):445-459
The regulation of protein synthesis by hemin in rabbit reticulocyte lysates is mediated by a hemin-controlled translational repressor protein (HCR) that inhibits polypeptide chain initiation. The effect of this translational inhibitor can be reversed by a high molecular weight protein in the post-ribosomal supernatant fraction. This supernatant factor has been purified approx. 700-fold. It is as effective in reversing the inhibition of protein synthesis due to an early form of HCR (intermediate HCR) as it is in stimulating protein synthesis in the absence of hemin. It is progressively less effective at reversing the inhibition of protein synthesis due to a late from of HCR (irreversible HCR), double-stranded RNA, and oxidized glutathione. The supernatant factor is chromatographically different from the initiation factor IF-MP, isolated from reticulocyte ribosomes, that can also overcome the inhibitory effect of HCR. The supernatant factor does not require hemin for activity, and its action is somewhat suppressed by a level of hemin that is optimal for protein synthesis. 相似文献
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提出国产化方案为传统的液压控制系统向高精度、低成本方向转化 ,开辟了一条崭新途径 ,且在生产实践 中运用取得了良好效果 ,创造了经济效益和社会效益 相似文献
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H Kawaguchi H Saeki K Sonoda T Ohga K Kitamura H Nakashima Y Toh H Kuwano K Sugimachi 《Canadian Metallurgical Quarterly》1997,24(12):1673-1676
PATIENTS: A total of 180 patients with esophageal carcinoma invading the neighboring structures (T4) were surgically treated by esophagectomy and reconstruction in the Department of Surgery II, Kyushu University from January 1965 to April 1997. Any of these cases with distant node metastasis and demonstrating organ metastasis or a combined resection of adjacent structures were excluded from this study. As a result, twenty-six patients treated with preoperative hyperthermo-chemo-radiotherapy (HCR Group), 39 treated either with preoperative radiotherapy or preoperative chemo-radiotherapy (R or CR Group) and 23 non-treated patients (Non-tx Group) were thus entered in this study. RESULTS: The 3-year survival rates after esophagectomy in HCR Group, R or CR Group and Non-tx Group were 26.5%, 0% and 9%, respectively, while the 5-year survival rate of the HCR group was 15.9%. The group with preoperative HCR thus showed a significantly more favorable outcome than R or CR Group and Non-tx Group. (p < 0.05). DISCUSSION: The significant difference observed in the prognosis was thought to be due to the reinforced effect of local regulation due to hyperthermia. Our data thus suggest that preoperative HCR contributes to the prolonged post-operative survival for carcinoma of the esophagus invading the neighboring structures. 相似文献
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