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由于旋窑与立窑窑型不同,熟料的形成条件不同,因此,所生产的熟料的化学组成、矿物组成、晶体结构及物理性能上都存在着差异。当它们混合粉磨的时候,相互间会产生一定的作用,从而对水泥的性能产生影响。故有必要对此进行研究分析。 相似文献
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0 引言 立窑熟料和立波尔窑熟料因煅烧方式不同,岩相结构和矿物组成及易磨性存在差别。若二者以不同的比例混合粉磨,制得的水泥颗粒及其物理性能有何特点呢?平顶山水泥厂原有两条Φ4×60m的立波尔窑生产线,年产硅酸盐熟料60万t,1998年扩建一条Φ3×10m的机立窑生产线,年产熟料8万t。为了研究两种不同窑型生产的熟料混合磨制的水泥的性能,我们利用本厂生产的立窑熟料和立波尔窑熟料,按不同的比例相混合,磨制成不同编号的水泥,分析其颗粒特 相似文献
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将湿法回转窑熟料和立窑熟料按不同比例混合磨制水泥,测定了水泥的物理性能。结果表明:混合磨制水泥的稠度、凝结时间、安定性等与单独粉磨水泥相比没有明显变化,但各龄期抗压强度比立窑水泥有很大的提高。立窑热料反碍不超过40%时,混磨水泥的强度与湿法窑水泥也相当或略有增长。运用灰色关联度方法研究表明,混合粉磨改善了水泥颗粒级配,有利于强度的发展。两种熟料单独粉磨至同一细度再混合后得到了与混合粉磨一致的结论。 相似文献
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立窑与回转窑熟料混合粉磨提高水泥质量的探讨潘永礼辽宁省铧子新生水泥厂(111312)我厂于1957年建厂,有机械化立窑3台:Φ2.5×10m、Φ2×8m、Φ2×7.8m;生料磨2台:2×Φ2.2×6.5m;水泥磨4台:3×Φ1.83×6.12m3台,... 相似文献
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A distributed mathematical model of ignition of a magnesium particle with allowance for the heterogeneous chemical reaction
and the region of the thermal influence of the particle on the gas is developed. A solution of the problem in a steady formulation
is found, which allows expanding the classification of the thermal history of the particle-gas system. A numerical model for
solving the considered class of boundary-value problems of magnesium-particle ignition is proposed, and the mathematical model
is verified in terms of the ignition delay as a function of the Nusselt number. A limiting size of the gas layer near the
particle, which determines the ignition mode, is identified. Stability of some heating regimes to finite and infinitesimal
disturbances is demonstrated. It is shown that the ignition process can be controlled by a high-frequency thermal action on
unstable states of the particle-gas system.
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Translated from Fizika Goreniya i Vzryva, Vol. 42, No. 3, pp. 57–63, May–June, 2006. 相似文献
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水平同心型料管道输送的数学模型 总被引:4,自引:0,他引:4
在假设条件下,参照管道水力学理论,分别引入运动型料表面和静止管道壁面的摩阻系数,建立水平同心型料管道流的简易数学模型。该模型较好地描述了型料管道的流动特性,能快速计算型料管道输送参数,其计算值和实验测试值非常吻合,适用于型料管道输送原理的研究和管道工程系统的设计。 相似文献
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根据约束线性规划原理及涤纶短纤维生产过程中物理变化的内在联系,建立了中空涤纶短纤维配料的数学模型,该模型充分考虑了再生涤纶短纤维生产的工艺要求,得到了适合生产需要的配料结果。通过实例模拟配料计算,该模型比常规配料计算更科学。 相似文献
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建立了纤维湿热表面涂覆的数学模型及衡算方程 ,讨论了其在项目设计和工程应用中的适应性。结果表明 ,在约束条件下 ,该数学模型具有较好的适用性 ,其衡算结果与实验结果相吻合。 相似文献
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A mathematical model, predicting the influence of a citrate complexant in the electrodeposition of copper—nickel alloys, was developed. The model which takes into account the deposition of complexed and uncomplexed species is based on convective-diffusion transport and Butler—Volmer reaction kinetics. Cu---Ni alloys were electrodeposited onto a rotating cylinder electrode at different rotation rates from electrolytes containing different total citrate concentrations. The theoretical model was found to predict correctly the influence of experimental variables, such as citrate concentration and rotation rate on the polarization behavior, alloy composition and current efficiency. Increasing the total citrate concentration in the electrolyte resulted in a reduction of the electrochemical reaction rates, which is explained by the interactions between the complexed and uncomplexed reacting species. 相似文献
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A mathematical model for optimal compression costs in the hydrogen networks for the petroleum refineries
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Hydrogen network design is an important step in hydrogen management of a petroleum refinery that manages the hydrogen distribution and consumption in a cost‐effective manner. While most works in this area have primarily focused on minimization of fresh hydrogen requirement and hydrogen purification aspects, very few works have dealt the issue of compression costs in hydrogen network designs. This work proposes a new mathematical model for synthesizing a hydrogen network with minimum compression costs. In contrast to the existing literature, this model uses stream‐dependent properties and realistic compressor cost correlations to determine the compression duty and costs, respectively. Tests on literature examples show that our model is flexible and gives reasonably favorable solutions than the previous models. Furthermore, the usefulness of understanding the trade‐offs between the number of compressors and compression duty and the importance of using stream‐dependent conditions in estimating compression costs are also highlighted in this work. © 2017 American Institute of Chemical Engineers AIChE J, 63: 3925–3943, 2017 相似文献
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不同窑型水泥颗粒一些特性的研究 总被引:4,自引:1,他引:4
测试了不同窑型水泥颗粒范围的化学成分、矿物组成和混合磨制水泥强度和颗粒分布的变化。结果表明,在粗颗粒中含有较多的C4AF和C2S,而C3S和C3A较少,而细颗粒中则相反。0~30μm颗粒对混合水泥3d和28d强度的发挥贡献最大,在考虑最佳颗粒组成时应尽量增加0~10μm颗粒的含量,适当增加10~30μm颗粒的含量,控制30~60μm颗粒的含量,降低大于60μm的含量。n·X与强度具有很好的相关性,可以用来表征颗粒分布,研究颗粒分布与强度的关系。 相似文献