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经过大量实验研究表明物料层在高压条件下,块料层中物料颗粒之间相互挤压,在每一个颗粒内部都产生强大的应力,当应力达到各颗粒的破坏应力时,这些颗粒就相继被粉碎。因为粉碎所需的能量直接施加于物料颗粒的周围,故其有效作用率较其它形式的粉碎作业大为提高。 相似文献
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以细磨和超细粉磨为特点的振动磨自首台工业磨问世以来,已历经五十多年的发展史。回顾这段历史,可谓技术日新月异,设备不断出新.其中最显著的标志可以归结于两个方面,一是振幅由早期的3~7mm提高到12~15mm,使磨机的生产能力数倍提高,由结构和设计参数制约的振动磨设备大型化难题可望通过高产得到很大程度的解决;二是振动粉磨的作用原理向破碎作业拓展,使其高能量利用率、高粉碎比的优势在包括粗碎、 相似文献
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日前,笔者在新疆昌吉市参加“水泥粉磨新技术应用推广现场会”上了解到,由四川省新都县新力公司研制、生产的BS—1型、规格为Φ2.1×3.8m的内筛棒碎破磨机,与新疆头屯河特种水泥厂的一台Φ3×11m闭路水泥磨配套,作为该磨前的预破碎设备。 由于该新型粉碎设备的特有性能——能力大、电耗低、出料粒度小而稳定等,使上述球磨机的产量一举从36t/h提 相似文献
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1 引言 近十多年来,在水泥工业中,粉磨设备技术有了不少新的重大发展。不过,在这期间的前大半时期,主要成果还在于辊压机、立式辊磨机系统的技术研究和应用开发。对于历史悠久的球磨机设备技术,发展显得相对缓慢一些。即便有所发展,也多限于球磨机筒体内部零件的改进,如设计应用一些新型的隔仓 相似文献
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0 引言 不管是由于目前国内大多数的球(管)磨机因属老式设计的,其粉磨效率很低,还是因为执行水泥新标准以后,多数厂都不同程度地提高了出磨水泥的比表面积而使水泥磨的产量下降,一个共同的愿望,一个长期的课题——提高水泥磨机的单台产量,是水泥工作者永远追求的目标。 相似文献
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玻璃纤维池窑拉丝生产线配合料的制备中,原料是形成优质玻璃液的基础,因此可以说配合料的稳定性、均匀性和准确性对玻璃纤维的质量起着决定的作用.生产实践证明:组分和粒度均匀的配合料,不但能强化玻璃液的熔化和澄清过程,而且还能减少或消除影响玻璃质量的各种弊病.所以认真拟定玻璃纤维原料的成分和选择玻璃纤维的种类和化学性质:严格控制进厂原料化学成分、粒度和水份;做好原料的分堆、存放、加工、称量、混合、输送是优质配合料制备不可缺少的手段,这也是做好玻璃纤维池窑配合料的基本任务. 相似文献
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本文论述了科研院所和军工企业复杂电子装备在研制与批生产高度交叉下的特点,并提出建立工程化管控体系,对研制与批生产交叉的质量和技术状态进行有效管控。 相似文献
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通过对 2种工艺路线的热负荷计算 ,确定改造后的设备变动情况。合理地增加酯化釜的加热面积、酯化塔的高度 ,保证了酯化反应的正常进行及EG和水的分离效果。在其他设备相应配套改动后 ,PTA路线的产品质量比DMT路线有较大的改善。 相似文献
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V. S. Vasil’ev 《Coke and Chemistry》2012,55(12):472-477
The following roller presses are recommended for the binder-free compaction of coking batch: high-pressure presses with alternating (projecting and recessed) cells (roller diameter 1.0–1.3 m) or with smooth rollers (diameter 1.2–1.4 m); or in some cases higher-speed medium-pressure presses (roller diameter 1.4 m) with cells consisting of two half-molds. The press with smooth rollers requires experimental study. 相似文献
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This paper presents a mathematical programming approach for the integrated design of batch processes involving multiple processing steps. Detailed dynamic models are used to describe the behaviour of individual batch operations. The mathematical formulation regards both the design (e.g. equipment items with discrete sizes) and operational characteristics (i.e. control variable profiles such as reflux ratio, cooling water flowrate) of each task as degrees-of-freedom, the values of which are selected to optimise a particular objective function (e.g. profit). The solution may be restricted by inequality constraints which hold throughout the task (e.g. reactor temperature violation) or at the end of the task (e.g. end-product purity specification). The sizes of the equipment items are treated as discrete decisions and are chosen from a selection of standard sizes. The mathematical formulation leads to a mixed integer dynamic optimisation problem and is solved using the outer approximation/augmented penalty (OA/AP) algorithm. 相似文献
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概括介绍了LNG的关键技术——液化技术,详细介绍了当前主要的液化工艺,如丙醇预冷却混合制冷剂液化工艺(PPMR)、优化级联液化工艺(OCLP)和双混合制剂液化工艺(DMR)等。同时还介绍了建立LNG工厂时需考虑的其他关键问题,如换热器、压缩机、动力设备及其他设备的选择参考原则。 相似文献
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An analysis of methods for batch compaction and molding is performed to ensure continuous operation of the energy-saving melting
chamber with a perforated layer. Approaches to solving the problem of molding the chamber layer before the start-up are discussed.
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Translated from Steklo i Keramika, No. 6, pp. 3–5, June, 2006. 相似文献
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Yisu Nie Lorenz T. Biegler John M. Wassick 《American Institute of Chemical Engineers》2012,58(11):3416-3432
A systematic framework for the integration of short‐term scheduling and dynamic optimization (DO) of batch processes is described. The state equipment network (SEN) is used to represent a process system, where it decomposes the process into two basic kinds of entities: process materials and process units. Mathematical modeling based on the SEN framework invokes both logical disjunctions and operational dynamics; thus the integrated formulation leads to a mixed‐logic dynamic optimization (MLDO) problem. The integrated approach seeks to benefit the overall process performance by incorporating process dynamics into scheduling considerations. The solution procedure of an MLDO problem is also addressed in this article, where MLDO problems are translated into mixed‐integer nonlinear programs using the Big M reformulation and the simultaneous collocation method. Finally, through two case studies, we show advantages of the integrated approach over the conventional recipe‐based scheduling method. © 2012 American Institute of Chemical Engineers AIChE J, 2012 相似文献