生产线改扩建中胶带机的改造

物料输送贯穿了整条水泥（熟料）生产线工艺的始终，物流顺畅是确保生产线正常生产的关键。胶带机是水泥（熟料）生产线物料输送的主要设备，一条水泥（熟料）生产线从矿山到厂区以及从原、燃料输送、调配到熟料输送、水泥生产，胶带输送机多达数十条，构成了整条生产线物料输送的动脉网络。     

高强度熟料生产实践

从配料方案、煅烧温度、熟料急冷和有害成分含量方面分析了影响熟料强度的因素,以A公司生产高强度熟料的实践经验为例,介绍了具体的原燃料调整措施,取得了很好的效果,并给出了进一步改进的合理建议。     

利用高硫原燃料生产抗硫酸盐水泥的分析和实践

中建材国际装备有限公司在伊拉克承建了一条3 300 t/d水泥熟料生产线,2014年3月30日进行调试生产,原设计旁路放风量为10%,投产后发现设计时业主提供的重油和石灰石等原燃料质量与实际差别很大,投产初期生产的抗硫酸盐水泥熟料中SO3含量在2.5%左右。因熟料中SO3含量高,无法满足伊拉克水泥标准和合同要求的欧洲ENV197-X抗硫酸盐水泥（简称SRC,下同）标准中SO3含量指标小于2.5%的要求,同时根据现场化验室小磨试验结果,当熟料中SO3含量大于1.8%,水泥配料中石膏掺加量小于1.5%,将严重影响水泥强度且水泥初凝时间无法保证。     

对飞砂料的初步判断与处理

水泥熟料煅烧十分复杂,与原燃料性能、生料成分、生料细度及均化程度、燃煤细度及煅烧状况、煅烧工艺及装备、生产控制、熟料率值等众多因素有关;而且其生产操作只能依靠设置的工况操作参数、生产过程中的某些现象以及对原燃料、生料、熟料的检测数据来控制。由于原燃料性能和生产控制的变化频繁,当熟料煅烧过程中出现问题时,如何正确判断问题的症结并采取合理的技术处理措施非常关键。     

机立窑生产高C3S含量熟料的体会

某厂水泥安定期较长,夏天为10d左右,冬天为30d左右。生产的P·O42.5水泥,尽管混合材掺量只有5%,但28d强度只有37MPa,为不合格品。我们采用三高率值、熟料晶种及磷石膏和萤石复合矿化剂配料,在该厂Φ3.0m×10m机立窑上试制出含C3S达76%的快硬高强熟料。再消解熟料中的fCaO,使其安定性合格。利用此熟料生产的P·C42.5水泥,不仅富裕强度高,而且混合材掺量可达40%。1原燃料及主机配置1.1原燃料的化学成分和煤的工业分析原燃料的化学成分和煤的工业分析分别见表1和表2。表1原燃料的化学成分%项目LossCaOSiO2Al2O3Fe2O3MgO石灰石41.854.5…     

协同处置电解铝大修渣对水泥质量的影响

研究了水泥窑协同处置电解铝大修渣后熟料碱含量、熟料强度、三率值以及煤耗的变化,以揭示大修渣的成分对水泥质量的影响,以及其原燃料替代情况。结果表明：大修渣碱含量为影响水泥窑况的主要因素,且处置量控制在生料量的2%以下为宜;大修渣能有效提高熟料28 d强度,协同处置期间,熟料3 d抗压强度平均降低1.2 MPa,28 d抗压强度平均增加2.3 MPa,熟料标准煤耗平均降低3.03 kg/t,有效实现危险废物无害化以及资源化利用。     

水泥原燃料工艺性能检测方法

1 水泥原燃料工艺性能检测的意义 水泥(熟料)的生产是一个原燃料的化学合成过程,被简称为"两磨一烧".为了降低能耗和提高产品性能,对原燃料的工艺性能检测具有非常重要的意义.     

高氯原料在预分解窑系统中的实践与应用

若原燃料中氯含量过高,会影响新型干法生产线窑系统的正常运行,引起窑尾系统的结皮和堵塞。消除氯不利影响的常规措施是采用“旁路放风”,但这既要增加投资,又要增加熟料的热耗和电耗。新绛威顿水泥有限责任公司1000t／d生产线所用原燃料中氯含量大大超标,通过采取优化操作、调整配料和加强生产管理等手段,基本消除了氯对窑系统的不利影响,实现了系统连续、稳定、正常的生产运行。     

浅谈影响熟料质量的因素

在新型干法水泥熟料生产中,影响水泥熟料质量的因素很多,文中介绍了影响水泥熟料质量的主要几大因素,在生产中要严格控制,实践表明,除要控制原材料和燃料外,配料要合理,中控操作中要加强风、煤、料的合理匹配及优化,才能保证生产出优质、高产、低耗、环保型熟料。     

应用三元线性回归分析方法预报水泥28d强度

对于一个稳定生产的水泥厂家来说，其主要工艺条件，原、燃料状况，在某一较长的时间内，是基本稳定的。在此前提条件下，出厂水泥２８ｄ抗压强度与熟料３ｄ强度、混合材掺量、水泥３ｄ强度之间，具有线性相关关系。应用三元线性回归分析方法，可直接预报水泥２８ｄ强度。...     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。