共查询到20条相似文献,搜索用时 78 毫秒
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磷化渣的控制及综合利用 总被引:7,自引:0,他引:7
磷化渣的控制及综合利用刘娅莉(湖南大学化学化工学院,410082)1前言随着汽车工业的发展,磷化技术取得了很大的进步,目前除开发具更优良性能的产品外,更多地注重环保及安全问题,磷化沉渣的处理问题即是其中之一。磷化渣是金属磷化过程中的产物,主要成份是磷... 相似文献
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针对磷化渣产生的机理及危害,分析了磷化液中磷化渣的沉降特性,并在此基础上,结合本公司涂装车间,提出了一种新的除磷化渣装置系统及其管理技术。 相似文献
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详细分析了车身磷化工艺中磷化渣形成的途径、影响因素、危害和相应的控制措施,介绍一种结合了斜板沉降法和压渣机的高效除渣系统及其管理方法。 相似文献
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Jordan L. Spencer Brendan J. Connick Allan J. Filippi 《Chemical Engineering Communications》1986,47(4):329-343
It is shown that cyclic variation of boiler make up and blowdown rates can significantly improve boiler performance relative to steady state operation. That is, for a given time average blowdown rate, cyclic operation results in a reduced average level in the boiler of nonvolatile feedwater contaminants such as silica. Or, for a given time average silica level, the average blowdown rate can be markedly reduced.
System performance was calculated for a limiting case involving infinitely high make up and blowdown rates, and also for a more realistic case in which bounded make up and blowdown rates were assumed. In addition a discrete-time (multistage) model of the system was used with an iterative gradient projection algorithm to calculate optimal make up and blowdown trajectories. In this calculation penalty functions were used to prevent negative or excessively high rates. In all cases a control trajectory corresponding to a period of high make up rate, followed immediately by a period of high blowdown rate, was found to be significantly better than steady state operation. 相似文献
System performance was calculated for a limiting case involving infinitely high make up and blowdown rates, and also for a more realistic case in which bounded make up and blowdown rates were assumed. In addition a discrete-time (multistage) model of the system was used with an iterative gradient projection algorithm to calculate optimal make up and blowdown trajectories. In this calculation penalty functions were used to prevent negative or excessively high rates. In all cases a control trajectory corresponding to a period of high make up rate, followed immediately by a period of high blowdown rate, was found to be significantly better than steady state operation. 相似文献
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有机磷酸盐类聚丙烯透明剂的合成及应用 总被引:6,自引:0,他引:6
孟海 《现代塑料加工应用》2005,17(4):43-45
以取代苯酚为原料,经过闭环缩合反应、磷酸酯化反应、水解中和成盐、置换反应及复配等合成有机磷酸盐类聚丙烯透明剂,利用合成的透明剂对聚丙烯进行改性。结果表明:该透明剂可有效提高聚丙烯的透明性,使聚丙烯雾度小于15%。 相似文献
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磷块岩的分形特征和反应活性 总被引:8,自引:0,他引:8
采用电子扫描显微镜和图像分析仪研究了我国三种典型的磷矿颗粒的表面结构,并提出了分形模型。由于沉积性磷块岩存在着自相似性,所得到分数维值可进一步预测磷矿颗粒内的磷灰石团粒分布率。同时对反应活性与表现分形间的关系也进行了探讨。 相似文献
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磷酸酯加脂剂的合成与应用 总被引:12,自引:0,他引:12
制备了高碳醇磷酸酯,并考察了磷酸酯合成的因素。以此与蓖麻油磷酸酯为基质的加脂剂,用于正面服装革和反绒革加脂,成革柔软,丰满性好,富有油润感和较好的丝光效应。 相似文献
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富含钙磷的多孔氧化钛膜及其生物活化机理 总被引:10,自引:3,他引:7
在不同电压下,钛经微弧氧化在表面形成富含钙磷的多孔氧化钛膜。通过模拟体液浸泡实验检测磷灰石的形成以确定样品的生物活性。实验结果表明:不同电压制备的微弧氧化样品在模拟体液浸泡后,只有400 V和450 V的样品表面生成磷灰石层,说明高电压制备的样品具有生物活性;而低电压制备的微弧氧化样品在模拟体液中浸泡长达50 d仍未见到任何物质沉积,表明其不具有生物活性。分析认为,粗糙多孔的表面虽有利于磷灰石的成核,但高电压下出现的CaTiO_3相及其水解吸引钙、磷沉积才是磷灰石形成的主要原因。 相似文献