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《不锈(市场与信息)》2009,(24):1-2
国家拟出台进一步加强淘汰落后产能工作的通知,协调发改委、工信部、环保部、国土部、商务部、海关总署、财政部、央行、银监会、质检总局、安监总局、工商总局、电监会、能源局等,以严厉措施,重点完成电力、煤炭、钢铁、水泥、有色、焦炭、造纸、皮革、 相似文献
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安阳钢铁、鞍钢股份、八一钢铁、包钢股份、宝钢股份、小钢板材、杭钢股份、河北钢铁、华菱钢铁、山东钢铁、酒钢宏兴、凌钢股份、柳钢股份、码钢股份、南钢股份、三钢闽光、沙钢股份、韶钢松山、首钢股份、太钢不锈、武钢股份、新钢股份、 相似文献
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摘要:钙质碱性球团具有机械强度较高、还原性较好等优点,对降低炼铁焦比、提高产量具有积极的促进作用。随着国内高炉逐渐大型化,高比例球团冶炼的工业应用增加,钙质碱性球团在提高球团应用比例的同时降低了烧结限产引起的碱度不足问题。国内诸多钢铁企业如首钢、太钢及宝钢湛江等基于链篦机 回转窑球团工艺、带式焙烧机球团工艺开展了钙质碱性球团生产探索。总结了国内外钢铁企业钙质碱性球团的性能指标,并结合矿物学原理明确了碱性熔剂对生球性能和焙烧固结强度的影响机制,结合实践给出了生产钙质碱性球团的改进措施。 相似文献
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结合南京钢铁联合公司炼钢厂过程数据采集系统的开发,介绍了IBA公司的高速数据采集软件及其提供的分析软件在转炉上的应用,此系统的使用解决了重要数据的高速采集及存储问题,为数据分析提供了方便。 相似文献
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针对现有普通链式拉拔设备条件下生产冷拔精密无缝钢管的工艺流程,分析了在该流程条件下的生产控制工艺,包括模具设计、退火、酸洗、润滑条件等控制要求,同时分析了该流程存在的热轧毛管供给困难、退火设施落后、拔制质量不稳定、生产成本高、环保压力大等诸多问题,指出了冷拔精密无缝钢管工艺控制的局限性。 相似文献
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分析了钢化学元素的作用,阐述了钢的特性、韧化机理。进行了热处理工艺(冷处理、时效)与力学性能的研究,确定了最佳热处理工艺。研究结果表明:攀长钢试制的A100合金,具有非常高的韧性和强度,通过885℃油淬加-73℃冷处理加480℃时效可以得到最佳的强韧性配合;A100钢必须保持高纯度,以保证钢的塑韧性。 相似文献
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介绍了冷弯型钢和焊管生产用轧辊的状况及由山东省四方技术开发有限公司研发出的优于国际上第三代高铬材料的高铬合金新材料及特殊的热处理工艺、加工工艺及高铬合金轧辊的情况。 相似文献
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Heat-induced oligomerization of the molecular chaperone Hsp90. Inhibition by ATP and geldanamycin and activation by transition metal oxyanions 总被引:1,自引:0,他引:1
It has been previously reported that heat shock protein 90 (Hsp90) oligomerizes at high temperatures and displays concomitantly a novel chaperone activity (Yonehara, M., Minami, Y., Kawata, Y., Nagai, J., and Yahara, I. (1996) J. Biol. Chem., 271, 2641-2645). In order to better define these oligomerization properties at high temperatures and to know whether they are influenced by modulators of Hsp90 function, heat-induced oligomerization of highly purified dimeric Hsp90 has been investigated over a wide range of temperature and protein concentrations by native polyacrylamide gel electrophoresis and size exclusion chromatography. Whereas below 50 degreesC, the dimeric form is maintained over a large range of concentrations, at the critical temperature of 50 degreesC, a sharp transition from dimeric to higher order oligomeric species takes place within minutes, in a highly ordered process, suggesting that a conformational change, leading to the appearance of a new oligomerization site, occurs in Hsp90 dimer. Moreover, at and above the critical temperature, the extent of oligomerization increases with Hsp90 concentration. Formation of high order oligomers at high temperatures is sensitive to modulators of Hsp90 function. ATP and geldanamycin, both known to bind to the same pocket of Hsp90, are inhibitors of this process, whereas molybdate, vanadate, and Nonidet P-40, which are thought to increase surface hydrophobicity of the protein, are activators. Thus, oligomerization of Hsp90 at high temperatures may be mediated through hydrophobic interactions that are hindered by ligands and favored by transition metal oxyanions. The fact that the heat-induced oligomerization of Hsp90 is affected by specific ligands that modulate its properties also suggests that this process may be involved in cell protection during heat shock. 相似文献
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Compared the performances of 20 process and 21 reactive male schizophrenics on a concept-formation task involving 3 levels of concept dominance. Concept dominance was determined by high, moderate, and low associative strength of the correct responses to the stimuli. Strength and frequency of incorrect competing responses varied inversely with the associative strength of the correct responses. Findings reveal a significant main effect for concept dominance and a significant Diagnosis * Concept Dominance interaction. Reactive schizophrenics performed significantly better than process schizophrenics when concept dominance was high (i.e., few weak competing responses), whereas there was a trend for process schizophrenics to perform better when concept dominance was low (i.e., many strong competing responses). Methodological implications are discussed in detail. (17 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献