共查询到20条相似文献,搜索用时 78 毫秒
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陈述了用等离子化学合成法稳定的ZrO2制造的耐火材料的烧结性及其对冶金炉渣碱性组份作物的抵抗能力的实验测定结果。查明,上述材料对Fe2O3、Al2O3和SiO2-CaO-Fe2O3系碱性渣的作用具有最大的抵抗能力,而对该系统酸性渣的抵抗能力则稍逊一筹,并且在SiO2的作用下发生活化分解。 相似文献
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硅酸盐水泥熟料是由多种矿物组成的集合体,它的颜色与各种矿物本身的颜色有着本质的联系。硅酸盐水泥熟料中的A矿(54CaO·16SiO2·Al2O3·MgO)是含有少量MgO、Al2O3的硅酸三钙固溶体,它常以单斜晶系、三方晶系、三斜晶系存在于熟料中,在单偏光镜下为无色透明的棱柱状。B矿(Ca2MxSi1-xO4-x/2,其中M=Al,Fe等)是含有Al、Fe、K、Na、Ti、Ba、V和Co等离子的硅酸二钙固溶体,它大部分为β型,属单斜晶系,在单偏光镜下为无色透明体。铝酸盐类矿物主要包括铝酸三钙、七… 相似文献
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钢渣,粉煤灰微晶玻璃试制探讨 总被引:5,自引:0,他引:5
介绍利用钢渣、粉煤灰试制以Ca(Fe、Mg)Si2O6为主晶相的CaO-Al2O3-SiO2系微晶玻璃方法的原料、玻璃化学组成和热处理工艺。 相似文献
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研究了在1600℃和氩气气氛下CaO-SiO2-Al2O3-Fe冲刷 O渣--金属系统对镁铬耐火材料的侵蚀。所获得结果总结如下。(1)在静态条件下由的CaO-SiO2-Al2O3-Fe总O和金属引起的镁铬耐火材料的主要蚀损方式是在渣--金属界面的局部蚀损。(2)在渣-金属界面的局部蚀损率是随着镁铬试样中的铁氧化物(e2O3)含量和金属中的碳含量的增加而提高,并随着渣中的铁氧化物(Fe总)含量增加而 相似文献
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粉煤灰的土工特性与工程填筑 总被引:1,自引:0,他引:1
粉煤灰的土工特性与工程填筑孙望超(北京物资学院工程系)1粉煤灰的理化性质与土工特性粉煤灰的主要成份SiO2、Al2O3,约占80%左右,还有少量Fe2O3、CaO及MgO、SO3、Na2O、K2O和部分碳粒,其化学性能比较稳定,一般没有危害人体健康... 相似文献
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本文用XRD、SEM和偏光显微镜等方法,研究了以碱度玻纤为基料,添加适量的Al2O3,MgO,在常压下合成堇青石的工艺途径及其影响因素。堇青石的合成温度因配方中的玻纤含量而波动于1180℃-1320℃之间。废玻纤中的CaO,Fe2O3,K2O和Na2O等均能参与堇青石的合成,CaO和Fe2O3可取代MgO而进入晶格,K2O,Na2O亦能进入堇石结构的空腔,不仅能降低合温度,而且能改善堇青石的性能。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献