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正辊压机和立式辊磨都是辊压研磨,其特点是用压力使两个辊面间松散堆积的物料相互作用而得以破碎或研磨。加压的磨辊要能自由移动,才能完全压实充满磨辊间隙的物料。辊压研磨与辊式破碎机不同,后者的辊子固定且两辊之间有一定辊隙,喂入的松散原料传递的力是不确定的,由于辊隙始终敞开,很多未被辊压的细料会穿过。辊式破碎机破碎的物料颗粒比辊隙大,而辊压研磨可研磨规格在一定范围内的物料,研磨后的物料颗粒远比辊隙小。 相似文献
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针对该粉磨站由RP140—110辊压机、φ4.2×13m闭路球磨机组成的联合粉磨系统产量低的问题,主要从入磨物料的性质和辊压机的操作参数以及设备性能三个方面进行分析并采取相应措施,使辊压机的运转率大于85%,系统产量提高到了设计能力155t/h,综合电耗接近了设计指标。 相似文献
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1辊压机的使用和辊面损伤的一般概况
辊压机具有能耗低、效率高且钢材消耗低及噪声小等功能,与球磨机组成的粉磨系统,可使球磨机系统产量提高30%~50%。因经辊压机挤压后的物料料饼中,0.08 mm细料占20%~35%,小于2 mm占65%~85%;而且小颗粒的内部结构因受挤压而充满微小裂纹,易磨性大为改善。 相似文献
辊压机具有能耗低、效率高且钢材消耗低及噪声小等功能,与球磨机组成的粉磨系统,可使球磨机系统产量提高30%~50%。因经辊压机挤压后的物料料饼中,0.08 mm细料占20%~35%,小于2 mm占65%~85%;而且小颗粒的内部结构因受挤压而充满微小裂纹,易磨性大为改善。 相似文献
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1.前言辊压机也称辊压磨是80年代中期由原联邦德国首先开发问世的粉磨节能设备,使用这种设备与粉磨系统的球磨机配套可以获得大幅度降低能耗和提高磨机产量的效果。辊压机作为一种新型的粉磨设备在我国许多水泥厂已得到广泛应用,由于辊压机的工作原理与现有的粉磨设备不同,不是靠冲击力、摩擦力等对物料实施破碎,而是采用纯压力破碎,也称为“粒间破碎”。这一原理的改变使辊压机应用于破碎物料时比传统粉磨设备具有较高的节能、增产意义,因而也具有较高的市场竞争力。同时国内外对辊压机的研究也日益完善,而辊压机的使用也使我们… 相似文献
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超微粉碎技术在国民经济的各个领域起着越来越重要的作用,特别是非金属矿的利用取决于对其进行深加工的程度,其中有效的超细粉碎是进行各项深加工的前提和保证。而超细辊压磨则是其最重要的深加工技术之一。因为多数非金属物料在普通机械冲击力作用下进行的粉碎很难达到1000目(13微米)以上。对于需要达到1000目(13微米)以上的非金属物料最佳粉碎方式是辊压研磨。为此,各国科技工作者在这方面开展了大量的研究,希望寻找出能在常温下使这类材料超细化的较理想的方法。在这方面研究卓有成效的是前苏联、美国、英国和日本。德国在这方面的研究也很系统全面,有一种自转加公转的粉碎方式可在常温下将非金属矿粉碎到1000目(13微米)以上,而且产量高。 相似文献
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正0前言随着水泥物料粉磨的发展,立磨以其占地小、电耗低、噪音小、产量高、等优点成为物料粉磨系统中的重要设备,主要用于粉磨水泥原料、水泥熟料、矿渣、煤粉等。而立磨磨辊门密封的严密程度会影响立式辊磨机的台时产量。磨机工作时摇臂实时摆动,要与静止的磨辊门间形成紧密接触的有效密封更加困难。为此,设计了一种新型的立磨磨辊门密封装置,该装置以获得国家实用新型专利。 相似文献
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要延长水泥厂辊压机辊面寿命,不仅要选购到适合本厂物料粉碎工况的挤压辊及焊丝,还要严格执行设备维护规则,重视辊面的小修小补;不仅要严格控制辊面工作的环境温度和物料温度,还要严格执行辊压机稳定工作的条件,确保料压、物料粒度、挤压粉碎力适宜;不仅要严禁硬质金属进入辊压机,还要减少硬质物料进入辊压机. 相似文献
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In this study, we investigated the reaction of cyanuric acid and epichlorohydrin (ECH). SnCl4 was used as a catalyst. Several reaction conditions were tested, and the products were analyzed by means of Fourier transform infrared and 1H‐NMR spectroscopy, hydroxyl group content, molar mass, elemental and thermal analysis, viscosity, and density. ECH reacted with the amine groups of the cyanuric acid ring to form lateral chains that contained chloroalkyl and hydroxyl end groups. Full substitution of the amine groups was observed in all of the synthesized products. The solvent used in the synthesis was found to be very important for the structure of the final prepolymers. When N,N‐dimethylformamide was used, relatively low‐molar‐mass prepolymers of cyanuric acid and ECH were obtained. When solvents with low dielectric constants were used, no reaction with cyanuric acid was observed. The prepared prepolymers were thermally stable up to 160°C. At this temperature, degradation started via the lateral chains. The viscosity of the products decreased as the ECH–cyanuric acid ratio increased, whereas the density remained basically constant. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3684–3691, 2006 相似文献
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氧化锆料浆性能对其喷雾造粒粉料性质的影响 总被引:3,自引:0,他引:3
本文研究了料浆含固量和粘度对其喷雾造粒粉料性质影响。结果表明:氧化锆料浆含固量是喷雾造粒(SD.)粉料填充密度的主要控制因素,高含固量料浆能得到高填充密度喷雾造粒粉料,且其颗粒显微结构相对致密;随着ZrO2料浆含固量、粘度增加,喷雾造粒粉料平均粒径增大,粗颗粒含量增多,细颗粒含量减少。 相似文献
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N. V. Pisareva T. M. Sandutsa A. N. Gaodu É. V. Degtyareva 《Refractories and Industrial Ceramics》1986,27(3-4):215-220
Conclusions During vibratory densification, the bulk density and the angle of repose of the corundum bodies based on hollow granules and a porous filler depend on the type of the filler used and the size of its grains. The relative settling and the relative density of the bodies obtained after densification are related to their bulk density and the angle of repose.We established the dependence of the shrinkage during firing, the apparent density, and the strength of the fired products on the bulk density, the degree of settling, and the relative density of the specimens after vibratory densification. At a given density, the products based on the corundum granules exhibit higher strength.We developed large-sized corundum products of complex shape for thermal insulation at 1800°C under reducing conditions.Translated from Ogneupory, No. 4, pp. 28–32, April, 1986. 相似文献
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对固相法和液相法合成氰尿酸的方法进行比较,采用比色法测定缩二脲含量,用甲醛测定尿素、缩二脲的总氮量,由缩二脲的含量、总氮量推算出尿素的含量及产品的纯度,从而说明液相法的优势。以不同溶剂加热脱氢生产氰尿酸的收率和纯度做了对比实验,并通过选择确定硅油210 50是一种新型的理想的和廉价的溶剂。 相似文献
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均三嗪分子具有特殊的芳香环骨架,其中的三个碳原子可直接连接烃基或通过杂原子连接烃基构成各种星型结构的三取代均三嗪分子,它们因具有良好的物理和化学性能被广泛应用于功能材料、医药等领域.本文以三聚氯氰、对羟基苯甲酸为主要原料合成2,4,6-三(4-羧基苯氨基)-1,3,5-三嗪,研究反应阶段反应物料比、时间、温度、缚酸剂、溶剂等因素对合成的影响,确定了2,4,6-三(4-羧基苯氨基)-1,3,5-三嗪的最佳合成工艺条件.通过试验研究,优化出最佳合成工艺条件为:n(三聚氯氰):n(对羟基苯甲酸)=1:4,反应温度为60℃,反应时间为2.5h,溶剂为丙酮,缚酸剂为氢氧化钠.该方法得到的产品产率高达75.63%. 相似文献
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William J. Walker Jr. James S. Reed Surendra K. Verma 《Journal of the American Ceramic Society》1999,82(1):50-56
Alumina specimens were prepared by compacting well-characterized spray-dried alumina granules of excellent deformability, followed by sintering. The strength and Weibull modulus were measured and microstructure was evaluated for specimens prepared from granules with different density and morphology. Compacts of spheroidal granules with lower density and lower granule strength sintered to 98% relative density and had fewer microstructural defects than compacts prepared from spheroidal or hollow granules of higher density. Flexural strength of sintered material was found to depend on initial granule size but not density or morphology of the granules. Weibull moduli of 18–20 were independent of particular granule characteristics. 相似文献
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Roberto Soldati Chiara Zanelli Guia Guarini Andreana Piancastelli Cesare Melandri Sandra Fazio Maria Chiara Bignozzi Michele Dondi 《Journal of the European Ceramic Society》2018,38(11):4127-4136
The compaction behavior of spray-dried powders has turned into concern in porcelain stoneware manufacturing due to the increasing diffusion of large slabs. It is necessary to fill a knowledge gap between the compaction behavior with conventional presses and novel technologies. For this purpose, eighteen industrially-manufactured spray dried bodies were characterized for specific properties connected to the compaction behavior (curves of bulk density, intergranular and intragranular porosity in function of applied load, apparent yield strength). In addition, the firing behavior was investigated in order to reveal any effect of dry bulk density on firing shrinkage and bulk density of fired samples. Powder compressibility is within 50% and 55% (Carr index) and is primarily controlled by moisture. Two regimes are found: low pressure (fast density increasing by granule cave in and closure of intergranular porosity) and high pressure (slow density gain by downsizing microporosity). A peculiar mechanism is unveiled: granules squeeze in the low-P regime and further densification is achieved through microfracture around individual agglomerate. A phenomenological model is illustrated for the compaction of spray-dried powders. In conclusion, the performance of spray dried bodies during compaction is crucial to control the uniformity, in terms of porosity and bulk density, which has important repercussions on the properties of final slabs, especially differential shrinkages and deformation during firing due to density gradients. 相似文献