共查询到20条相似文献,搜索用时 31 毫秒
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阐述了镁质无光釉配料的改进方案,用含5%~30%MgO的熔块与镁质原料和其他釉原料配料,制备无光釉可获得饰面状态良好、无针孔缺陷的无光釉面。 相似文献
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An abrasion-resistant composite material based on titanium carbide is suggested for end seals of centrifugal pumps. Physicomechanical and service tests have shown the possibility of using it as facing and sealing materials and wear-resistant coatings instead of tungsten-bearing hard alloys. 相似文献
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针对圆柱形薄壁储罐在爆炸冲击波载荷作用下的动力学响应进行了模拟分析。采用LS-DYNA软件模拟计算了50 m3液化石油气储罐爆炸后冲击波云图以及空间点冲击波超压随时间的变化关系,并将计算结果加载到圆柱形薄壁储罐上。模拟计算结果表明,对于距离爆炸中心50 m处的圆柱形薄壁储罐,面向冲击载荷的底面在冲击波超压峰值还没有来临时就已经屈服,而背向冲击载荷的顶面在0.112 ms时,等效应力达到屈服界限。而迎向冲击面的顶端结构在峰值载荷冲击后不久出现屈曲,结构在峰值位移10 mm时出现部分卸载,变得不再稳定。因此,当罐区发生爆炸时,圆柱形薄壁储罐极有可能出现结构强度失效和结构失稳,会在冲击波的作用下失效,是不可靠的。 相似文献
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为了实现黄金尾矿高效资源化利用,以黄金尾矿为主要原料,采用无压烧结制备了陶瓷清水砖样品,研究了黄金尾矿添加量对样品相组成、显微结构及性能的影响。结果表明,当烧成温度为1 100 ℃,黄金尾矿添加量为70%(质量分数)时,样品性能最优,其抗折强度达73.42 MPa,吸水率为0.10%,气孔率为0.25%,体积密度为2.46 g/cm3,烧成收缩为8.64%,达到GB/T 4100—2015《陶瓷砖》中瓷质砖的要求。样品的相组成为钙长石、石英、白榴子石和赤铁矿。清水砖坯釉结合性好,釉面光滑,色泽均匀。 相似文献
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石油是国家的重要战略物资,关系着国民经济的正常运行和国家安全。面对我国石油净进口的现实,加快我国石油及石油产品的储备和运输设施的建设,尤其是加快适应石油储运的长距离、大口径油气管道和储备油库的规划和建设是迫在眉睫的任务。 相似文献
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叶永茂 《高科技纤维与应用》2010,35(6):18-22
面对国内外的竞争形势,我国高新技术纤维材料产业正处于"稳质量"、"上水平"、"降成本"和"拓应用"转型升级的关键时期;在总结"十一五"行业发展成就和问题的基础上,结合正在编写的规划,对"十二五"期间高新技术纤维材料产业新的发展思路、目标任务、政策建议等提出了卓有见地的初步构想。 相似文献
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V. S. Popov N. N. Brykov V. P. Khokhlov V. I. Fidrya P. G. Pristupa N. S. Dmitrichenko A. B. Gutman V. I. Gershkovich V. Kh. Zima I. P. Korol'kov 《Refractories and Industrial Ceramics》1973,14(7-8):401-403
Conclusions The best base for alloys, wear resistant against abrasive action, is unstable residual austenite in combination with certain quantities of martensite. The wear resistance of material with this base is higher the higher the concentration of carbide phase. However, the use of plates made from highly alloyed irons possessing high resistance to wearing is not at present possible because of their brittleness.At present the most promising material for making facing plates for molds is forged steel Kh12 (GOST 5950-63). After tempering from 1075°C this steel contains 72% residual austenite, 16% martensite, and 12% carbides with a hardness of 53 HRC. The life of the plates made from steel Kh12 is 1.5–2 times greater than that of plates made from steel Kh12F1. At the same time steel Kh12 is almost twice as cheap as steel Kh12F1, and the production technology for the facing plates from both these steels is practically identical; we recommend steel Kh12 for wide use in production.Translated from Ogneupory, No. 7, pp. 7–9, July, 1973. 相似文献
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William V. Longley 《Color research and application》1980,5(2):87-92
Suppliers of color-matched automotive parts are sometimes frustrated when match tolerances set by automotive stylists seem inconsistent or unrealistic. The stylist, on the other hand, sees a perplexingly wide range of quality and is aware of vast differences in expertise among those supplying material or parts. Here we explore the parameters affecting color match and discuss the role of color measurement in facing the problems. 相似文献
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国内外水性木器涂料发展现状及趋势 总被引:1,自引:0,他引:1
简要介绍了木器涂料在涂料工业中的地位、品种结构和面临的挑战。重点介绍了水性木器涂料发展现状及趋势,讨论了水性木器涂料在UV固化和纳米材料复合改性等方面的技术进展。 相似文献
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氧化铁行业虽然面临着原材料涨价、人民币持续升值、欧盟REACH法规的即将实施及出口退税率取消等多重压力,但重视环境保护对氧化铁企业的发展确是至关重要的。切实有效地抓好环保治理及资源综合利用的基础工作,才是企业真正实施绿色环保、绿色生态环境,承担起对环境、生态、社会的责任,走的一条可持续发展道路。 相似文献
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面对渣油制氨装置设计的燃料结构、原料结构不利因素和产品结构单一、经济效益逐步下降的现状.镇海炼化面对挑战,遵循科学,在近l0年的时间里,稳步推进原料结构和燃料结构、产品结构的调整,稳步实现人员的分流工作,于2010年4月停产化肥,实现了较为圆满的成功转型。 相似文献
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The possibility of using feldspar material from the Chupinskii mining and concentration works in mixtures for the production of ceramic facing tiles is considered. The effect of this material on shrinkage, water absorption, and strength of articles based on Cambrian clays from the Chekalovskoe deposit is studied, and their properties are compared with samples of the mixture used at the Nikol’skii Ceramic Works. The use of quartz-feldspar dust-removal waste makes it possible to exclude lime from the mixture composition and to decrease the quantity of quartz sand requiring milling.__________Translated from Steklo i Keramika, No. 3, pp. 22 – 23, March, 2005. 相似文献
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Esther Brepohl Dr.-Ing. Mandy Paschetag Prof. Dr.-Ing. Stephan Scholl 《化学,工程师,技术》2023,95(8):1282-1289
Plastic waste is one of the major challenges facing modern society. Against the background of climate change and finite fossil resources, the realization of a true circular economy for plastics is imperative. Mechanical recycling processes offer a short-cut path for the recycling of clean, single material waste while they are not capable to handle mixed material or colored feeds. Complementary technologies are necessary to recover pure monomers, hydrocarbon mixtures or syngas from mixed secondary raw material to continuously close the loop in a circular plastics economy. Using the example of PET, this contribution discusses the benefit of integrating a back-to-monomer recycling for closing the loop aiming at a holistically approach integrating technological, ecological and economic aspects. 相似文献
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无论发达国家还是发展中国家,中小企业都是经济发展和社会稳定的重要支柱。在我国,中小型超硬材料企业的发展,促进了超硬材料行业的经济增长,转移了许多农村富余劳动力。由于中小型超硬材料企业比大企业有着更多的信息不对称和银行的服务技术缺陷等问题,融资较难。文章叙述了近年来在不少超硬材料小企业纷纷倒闭、“风急浪高”情况下中小型超硬材料企业融资的渠道。进而认为,中小型超硬材料企业应积极进取,从证券交易所、投资机构、投机资本家、政府、银行、产权交易所等多处融资,并列举了一些融资成功和不成功的的具体事例。 相似文献
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尽管我国在环境保护及污染治理方面做了大量工作,但目前环境问题依然突出。煤是我国化学工业的主要能源和原料,但煤又是一种低效、高污染的能源,因此煤化工工艺过程的污染及防治应引起关注。对煤化工部分工艺过程(煤气化、煤制油)的污染物排放及煤化工产业污染防治的若干问题进行了分析,指出我国煤化工的发展,应在环境容量允许的条件下,以国家相关产业政策为指导,走循环经济、低碳经济之路,实现健康、可持续发展。 相似文献
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介绍了硫化氢腐蚀机理;着重分析了林德低温甲醇洗工艺中的甲醇洗涤塔等主要设备的硫化氢腐蚀特性;探讨了应对硫化氢腐蚀的设备选材策略;提出了控制硫化氢腐蚀的工艺操作方案。 相似文献