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1、-超细碳酸钙颗粒的离心分级.doc 的翻译CENTRIFUGAL CLASSIFICATION OF ULTRAFINE CALCIUM CARBONATE离心式超细碳酸盐钙的分类Abstract: The e*perimental results on wet classification of ultra-fine calcium carbonate below 8m using an industrial scale disc-stack nozzle centrifuge system are presented.摘要：碳酸盐岩大型光盘的超细碳酸钙的实验结果对湿超分类为8m以下使用工业
2、叠离心喷嘴系统的介绍。The parameters such as G-force, disc geometry, nozzle size, split, feed rate have been analysed by a statistical approach.，分割参数，如G力，光盘的几何形状，喷嘴大小，进给率进展了分析，用统计方法。The results show that the centrifuge is capable to efficiently classify the micron-sized material at 40in mass.结果说明，该离心机是能够有效地分类，
3、在40的微米材料的质量大小。The product size distribution bees finer and steeper after removing the undesired coarser particles from the feed.该产品粒度分布和饲料陡变细后粗颗粒的去除不想要的。In addition, the centrifugal classification performance is empirically correlated to the parameters used.此外，在离心力的分类性能是相关经历的参数。Key words: classifica
4、tion; centrifuge; ultrafine particles; calcium carbonate关键词：分类，离心机;超细粒子;碳酸钙With specifications of ultra-fine particles being more stringent, the importance of a well controlled product has bee more significant.随着颗粒规格超细日趋严格，产品的重要性，一个很好的控制已变得更加重要。The particle size distribution should be enginnered to
5、suit the subsequent process that utilises the producted slurry.粒径分布应engineered适应后续加工，利用的开发生产出浆。Also, minution alone is seldom enough to ensure that the product con-forms to a desired product specification with less energy input, and it is often difficult to contorl with respect to the ma*imum partic
6、le size and even more so with respect to size distribution form.此外，单是很少粉碎足以保证该产品浓度，以较少的能源形式输入所需产品的规格有了，而且往往很难control方面的最大粒径及粒径分布形式更要就。One option for separation of ultra-fine particles below 2 m or 1 m from the microsized materials is to utilise a classification technology based on centrifugation.16
7、In recent years, two types of centrifuges, ie, the decanter centrifuge3 and disc-stack centrifuge, 46have been applied for such classification duties.一材料的选择为1微米的微型从别离超细或低于2微米的颗粒是利用一个基于分类技术3离心。1-6近年来，两种类型的离心机即卧螺离心机 和光盘堆栈离心机，4-6职务的分类已申请等。It has been revealed that such a classification process with a s
8、pecific centrifuge is plicated by a number of influencing parameters.据透露，这种离心机的具体分类过程是一个复杂的参数，通过影响一数。Therefore, the object of this work is to investigate the classification perform-ance of a micron-sized calcium carbonate below 8 m in a disc-stack centrifuge under various parameters.因此，工作对象，这是调查的分类进
9、展参数ance一微米大小的各种堆栈离心机下低于8微米碳酸钙在一个光盘。1 E*periemntal1 E*perimentalA calcium carbonate powder (size: 8 m; BET special surface area: 7 m2/g) was used as an e*periental sample.阿碳酸钙粉大小：8微米押注特殊的外表面积：7平方米/克被用来作为e*perimental样本。For particle dispersion, a sodium poly-acrylate was utilised in this investigation.
10、粒子分散，钠聚丙烯酸酯是利用在本次调查。A loop e*perimental system at a flow rate up to 30 m3/h was used.一个循环/小时的实验系统，流速可达30立方米使用。It includes a large-scale disc-stack nozzle Model Q*21030B centrifuge (Alfa Laval AB, Sweden), circuit pumps, tanks and a plate heat e*changer as well as control systems.它包括一个大型盘叠喷嘴型号Q*210 -
11、 30B条离心机阿法拉伐AB，瑞典，电路泵，水箱和板式换热器以及控制系统。Figure 1 shows the schematic of this type nozzle centrifuge used for classification duties.图1显示了这种类型的工作原理图分类喷嘴离心机使用。This type of centrifuge is designed for recirculation of a part of the nozzle discharge to the bowl.这种类型的离心机是专为碗再循环的A局部的喷嘴排放。The recirculated strea
12、m of the underflow product is not mi*ed with the feed, but is taken down to the bottom of the bowl, where it enters a special distributor.该产品的循环流溢出的是不是混在饲料，但带下经销商底部的碗，它进入一个特殊的。The distributor sends out the recirculated material through recirculation tubes to the vicinity of the nozzles.分销商发出再循环材料的再循
13、环管通过向喷嘴附近的。Thus the recirculated material is sent back to the nozzles without interfering with the separation of the feed.因此，再循环材料送回喷嘴无干扰了饲料的别离。The nozzle discharge is collected in a defoaming pump, and then split into two parts, one being recirculated and the other being drawn off.喷头喷洒被收集在一个消泡泵，然后一
14、分为两局部，即循环和其他被抽出。In the centrifuge used in this work, there are 12 openings for the installation of nozzles.在这项工作在离心机使用，有12个喷嘴开口的安装。This centrifuge consists of 65 discs and the thickness of the spacer between discs is 1 mm.这种离心机由65光盘和光盘之间的垫片厚度为1毫米。The type of conical disc installed in the machine is
15、either a disc with rib spacer (disc *1) or a disc with small round stud spacer (disc *2), respectively.该机型在安装的锥形盘可以是一个带肋间隔分别光盘光盘1，或一盘小轮螺栓垫片光盘2。Its motor power was 22 kW.它的电机功率为22千瓦。In addition, the motor power of the recirculation pump was 7.5 kW.此外，循环泵电机功率为7.5千瓦的。The feed rate or the split should b
16、e limited below the flooding level of this centrifuge.进给率或分割应限制低于这个水平离心机洪水。Fig.1 Schematic of a disc nozzle centrifuge图1光盘喷嘴离心机The powder was put in a 5 m3 tank, which contained tap water, and then mi*ed in the presence of the polymeric dispersant by vigorous stirring.这些粉末被放在一个5立方米坦克，其中载有自来水，和高分子分散剂混合后，在出席由剧烈搅拌。The desired solids content of the feed slurry was 40in mass.固体含量浆料所需的饲料量为40英寸The slurry was fed through a slurry pu
