HRM型全外循环生料立式磨及其粉磨系统的研究与应用

文中论述研制一种HRM型外循环立式磨作为全外循环生料终粉磨系统主机设备,自身不带选粉机,用机械提升的方式将物料提至V型选粉机,细物料经V选后进入高效动态选粉机分选,粗颗粒回立磨继续粉磨。通过理论计算,该项目研究的全外循环立式磨生料粉磨系统的电耗可以控制在10kWh/t～13kWh/t,对于水泥生产装备技术来说,该项目内容是具有重大意义的研究方向。     

生料辊压机粉磨系统设计使用几点注意事项

生料辊压机粉磨系统应用广泛,柱钉辊套式辊面使用寿命较长,粉磨效果良好。通过控制原料破碎机出料粒度,配置大块金属外排装置,提高V型选粉机入料分散效果,控制动态选粉机粗粉200μm和80μm筛筛余比值,可延长辊压机辊面使用寿命,提高V型选粉机和动态选粉机选粉效率,优化生料粉磨系统运行指标。     

V型选粉机下料溜槽技术改造

正0前言辊压机联合粉磨工艺系统主要是两种不同粉磨主机的粉磨系统进行"分段粉磨",目前广泛采用的是辊压机+V型选粉机与管磨机系统组成的联合粉磨系统。V型选粉机是辊压机系统内一种静态分级打散设备,将从辊压机里出来的饼状料打散,然后依     

V型选粉机入料溜子的改进

<正>我公司5 000t/d生产线的两条水泥粉磨系统采用Ф1 600mm×1 200mm辊压机+V型选粉机+Ф4.2m×13m水泥磨+O-Sepa高效选粉机的双闭路联合粉磨系统,V型选粉机采用合肥水泥研究设计院的HFV-3500型选粉机,选粉风量(18~24)万m~3/h,带料能力160~275t/h。投产以来,2号磨P·O42.5水泥产量一直偏低(约170t/h)。经检查,确定主要原因是V型选粉     

水泥联合粉磨系统改为半终粉磨系统的经验

<正>水泥粉磨工艺和设备的配置对水泥生产效率及经济效益影响极大。为提高水泥粉磨效率水平,我公司和江苏吉能达建材设备有限公司共同探讨,结合原有条件制订由联合粉磨改造成半终粉磨系统的工艺。重点是采用"多级分选、分段粉磨"的原理,将一台预粉磨系统成品分离专用选粉机(以下简称专用选粉机)设置在辊压机预粉磨系统中的V型选粉机出风口处,将辊压机系统挤压预粉磨过程中产生的合格品、粗颗粒及时分选出来。通过安装调试与生产运行证     

V2500选粉机的设计

近年来，辊压机半终粉磨系统在国内水泥工厂得到了广泛的推广和应用。该粉磨系统中的V型选粉机，是一种集打散、分离于一体的静态选粉设备，具有投资低、能耗小、调节方便、维护简单、打散分选效果好等诸多特点。中材国际南京水泥工业设计研究院结合工程实际情况，开发设计了配套相应辊压机半终粉磨系统的V2500选粉机，目前已投人工程运行，现介绍一下该设备的设计情况。     

浅谈辊压机异常波动的原因及对策

1概述 我公司采用CLF170×100型辊压机配VX8820型选粉机进行预粉磨,并与Ф4．2m×14．5m水泥磨组成开路联合粉磨系统。调配站原材料首先被提升至VX8820型选粉机顶部进人选粉机进行选粉,细粉料由循环风机的风力带动进人双旋风筒内收集人磨,粗颗粒的物料则下落至稳流仓后进入辊压机进行辊压。经辊压机辊压后的物料与调配站的原材料一起,提升至V型选粉机进行选粉。     

联合粉磨系统的几项实用改造

针对闭路联合粉磨系统辊压机边缘漏料、侧挡板磨损、磨头返料、入磨和出磨物料粗等工艺问题,进行了实用性改造,有效提高了V型选粉机的选粉效果和辊压机做功,达到了稳定工况、提产降耗的目的。     

闭路联合粉磨系统主机设备配置与能力发挥探讨

据调查显示,现阶段我国水泥工业生产中,由辊压机+V型选粉机+管磨机+O-Sepa高效选粉机组成的双闭路联合粉磨工艺系统占有较大比例,由于预粉磨设备辊压机与磨尾成品选粉机选型配置等方面的原因,系统产量参差不齐,粉磨电耗一般在27～36kWh/t之间波动.本文以贵州某水泥公司(系统一)和安徽淮南某水泥公司(系统二)5 000t/d生产线为例,通过在相同规格和装机功率的管磨机前后配套不同辊压机、成品选粉机,探讨不同选型配置与选粉机选粉效率对系统产量、粉磨电耗的影响,并比较了两个联合粉磨系统的技术参数,探讨了成品选粉机规格选型.两个案例的磨尾均采用双风机系统.     

生料辊压机终粉磨系统产量低的原因及措施

生料辊压机终粉磨系统投产初期仅380 t/h,不能满足生料供应需求。分析认为,系统产量低的原因为：风量不够;循环风形成短路风;精细选粉机及V型选粉机选粉效果差;选粉机阀门调节不当;辊面磨损严重;入辊压机物料粒度大。技改后,生料产量达到420 t/h,满足了生产要求。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.