共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
研究了两种预处理方式的磷石膏作缓凝剂时对水泥物理性能的影响,并与以天然石膏作缓凝剂的水泥性能进行比较。结果表明:煅烧磷石膏作缓凝剂时,水泥凝结时间及3 d和28 d强度接近或好于掺天然二水石膏的水泥,可对其进行资源化利用。 相似文献
3.
4.
5.
6.
本文结合磷石膏作水泥缓凝剂实际生产情况与相关试验数据,分析对比了不同磷石膏的磷、氟含量情况以及作水泥缓凝剂的使用效果,发现磷石膏作水泥缓凝剂的利用率不仅与磷石膏特性有关,也与水泥生产其他原材料有关。水洗法和中和法改性磷石膏可溶性磷、氟含量变化较小,很难找到各自磷、氟含量与水泥凝结时间的相关性,但不同磷石膏可溶性磷含量有较明显区别。因此,水泥企业可统计分析各类磷石膏杂质含量范围作为进厂质量控制依据,并结合本厂原材料实际情况、季节变化和市场需求来调整与优化石膏掺量及其掺比结构,在保证水泥性能的前提下,提高磷石膏掺比,降低生产成本。 相似文献
7.
8.
改性磷石膏用作水泥缓凝剂 总被引:5,自引:1,他引:5
选用磷渣配料生产的熟料,进行了改性磷石膏作水泥缓凝剂的试验,采用自制改性剂,并经过热处理,对磷石膏进行改性,对比了改性磷石膏和天然石膏作缓凝剂的使用效果,结果表明,与天然石膏要比自制改性剂并经煅烧工艺制得的改性磷石膏作缓凝剂,水泥凝结时间一致或稍有缩短,早期强度略低,强度增进率较高,水泥安定性合格,并提出了水泥中SO3含量的控制范围。 相似文献
9.
磷石膏作缓凝剂在水泥生产中的应用 总被引:2,自引:1,他引:2
磷石膏作缓凝剂在水泥生产中的应用孙国芳江苏省扬中县水泥厂(212200)1磷石膏的物化特性及作缓凝剂的可行性水泥工业生产中一般以天然石膏作通用水泥的缓凝剂,而化学副产石膏的应用并不普及,磷石膏是湿法制造磷酸的工业废渣,含自由水20%~30%,外观为灰... 相似文献
10.
11.
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
13.
14.
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.
__________
Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
15.
16.
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
17.
18.
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
19.
20.
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