共查询到19条相似文献,搜索用时 328 毫秒
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介绍了攀钢提钒炼钢厂1号和2号方坯连铸机的性能参数、工艺布置及流程、设计特点、装备水平,及攀钢通过技术改造新建1号和2号方坯连铸机,彻底淘汰模铸实现全连铸的实践经验. 相似文献
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介绍了攀钢提钒炼钢厂1号和2号方坯连铸机的性能参数、工艺布置和流程、设计特点以及装备水平,攀钢通过技术改造新建1号和2号方坯连铸机,彻底淘汰模铸实现了全连铸。 相似文献
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鞍钢第一炼钢厂2号方坯连铸机的网络系统硬件采用了美国AB公司的产品,网络通讯采用Control net及Device net网络.主要介绍了2号方坯连铸机的网络硬件配置、软件组态的方法及系统运行现状. 相似文献
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柳钢投资1500万元改造35吨转炉系统的3台方坯连铸机。此次改造内容主要是对1号、2号方坯连铸机进行增流改造,将铸机流数由原来的3流改造为4流,其中2号方坯连铸机为移地改建,将3号方坯连铸机的液压剪改为火焰切割同时,将3台方坯连铸机的二冷配水由原来的手动配水改为自动配水。 相似文献
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20 0 3年攀钢三期工程建设总投资预计达 17.6亿元 ,是攀钢三期工程建设投资最多的一年。同时还要确保完成各种设备的安装调试任务 ,建设任务特别繁重 ,整个三期工程建设已进入关键时期。据了解 ,2 0 0 3年全连铸改造、热轧技改、新建冷轧热镀锌铝机组等攀钢三期工程建设的标志性工程将进入建设攻坚阶段。其中 ,全连铸改造的 1号方坯连铸机和 2号板坯连铸机将在 2 0 0 3年 9月前安装调试完毕。热轧技改的更新热卷箱、新增卷取机、钢卷运输链系统改造等项目在 2 0 0 3年 2月底进行停产建设 ,新 1号加热炉、精整上料系统改造等项目将在 2 0 0 3… 相似文献
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通过对武钢4号高炉热风炉易地大修前后两次热平衡测定的具体数据的分析,评价了大修后的热风炉经济技术指标,同时指出了仍存在的问题及可改进的途径 相似文献
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攀钢炼铁厂3^#高炉在2006年4月大修时新增4^#热风炉,工艺上要求该炉对2^#、3^#高炉自由切换送风。3^#高炉大修后控制系统采用Ovation系统,该系统是目前世界上先进的DCS系统,具有强大时序控制和模拟量处理功能,为满足复杂的工艺要求,对4^#热风炉的控制采用了2个远程Drop和1个监控站控制模式,对该炉的控制功能得以较好的实现。本文简要介绍了在Ovation系统上对攀钢2^#、3^#高炉新增热风炉的自动控制过程。 相似文献
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HH Schmidt H Hofmann U Schindler ZS Shutenko DD Cunningham M Feelisch 《Canadian Metallurgical Quarterly》1996,93(25):14492-14497
The nitric-oxide synthase (NOS; EC 1.14.13.39) reaction is formulated as a partially tetrahydrobiopterin (H4Bip)-dependent 5-electron oxidation of a terminal guanidino nitrogen of L-arginine (Arg) associated with stoichiometric consumption of dioxygen (O2) and 1.5 mol of NADPH to form L-citrulline (Cit) and nitric oxide (.NO). Analysis of NOS activity has relied largely on indirect methods such as quantification of nitrite/nitrate or the coproduct Cit; we therefore sought to directly quantify .NO formation from purified NOS. However, by two independent methods, NOS did not yield detectable .NO unless superoxide dismutase (SOD; EC 1.15.1.1) was present. In the presence of H4Bip, internal .NO standards were only partially recovered and the dismutation of superoxide (O2-.), which otherwise scavenges. .NO to yield ONOO-, was a plausible mechanism of action of SOD. Under these conditions, a reaction between NADPH and ONOO- resulted in considerable overestimation of enzymatic NADPH consumption. SOD lowered the NADPH:Cit stoichiometry to 0.8-1.1, suggesting either that additional reducing equivalents besides NADPH are required to explain Arg oxidation to .NO or that .NO was not primarily formed. The latter was supported by an additional set of experiments in the absence of H4Bip. Here, recovery of internal .NO standards was unaffected. Thus, a second activity of SOD, the conversion of nitroxyl (NO-) to .NO, was a more likely mechanism of action of SOD. Detection of NOS-derived nitrous oxide (N2O) and hydroxylamine (NH2OH), which cannot arise from .NO decomposition, was consistent with formation of an .NO precursor molecule such as NO-. When, in the presence of SOD, glutathione was added, S-nitrosoglutathione was detected. Our results indicate that .NO is not the primary reaction product of NOS-catalyzed Arg turnover and an alternative reaction mechanism and stoichiometry have to be taken into account. 相似文献
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介绍了安钢新1号高炉在1995年建设中采用的新技术、新工艺和开记后的生产效果。高炉投产后7天达产,一个月后利用系数为2.5t/(m^3·d)1996年产铁30.34万t,平均利用系数2.76t/(m^3·d)。 相似文献
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