玛干三辊破碎机在瓮福磷铵厂的应用

为了改善磷酸二铵产品颗粒的圆润度与均匀性,瓮福磷肥厂在破碎系统应用了玛干三辊破碎机。介绍玛干三辊破碎机的结构、工作原理及特点。玛干三辊破碎机的应用改善了磷酸二铵产品的质量,产能增加,年创直接经济效益迭5．94亿元。     

中浓度硫基复合肥的生产技术

随着高浓度复合肥数量在市场上的递增,一些地区因其所销肥料产品养分固定,价位较高,而出现过剩。我公司通过市场调查与分析,利用高浓度(151515)硫基复合肥装置生产中浓度(1587)复合肥。介绍中浓度硫基NPK与高浓度硫基NPK的工艺流程和生产控制的异同点。     

三辊破碎机在复合肥生产中的应用

就三辊破碎机在复合肥生产中的应用进行了总结，对破碎机在生产中经常出现的位移传感器、液压系统、过载跳车等故障进行分析，并提出相应的处理措施。     

三辊破碎机常见故障分析与处理

介绍大型复合肥生产装置中的关键设备之一——三辊破碎机的技术参数和结构,运行中常见的典型故障及分析,对处理方法进行了归纳、总结。     

影响硫基氮磷钾肥生产的常见工艺故障及其控制方法

硫基氮磷钾(NPK)复合肥是适用于所有作物生长的三元复合肥,尤其对一些忌氯作物,更是不可缺少的深受农民喜爱的化肥。硫基NPK的生产目前基本采用我国自行开发的氯化钾低温转化喷浆造粒工艺,合格的产品粒度应为2-4mm的圆滑粒子,总养分为45％的含NPK三元化肥,控制不好时经常会出大球或细粉,使生产难以为继。     

Hetron 197树脂在磷复肥工程中的应用

通过Hetron 197树脂在氮磷钾(NPK)复合肥装置洗涤系统中应用的工程实例，介绍Hetron 197树脂的性能及应用前景。     

复合肥装置工艺流程的选择和优化(续完)

3复合肥装置工艺流程的优化和选择生产NPK复合肥的上述6种工艺流程,在我国都有生产装置,以流程5和流程1居多,流程4近几年逐渐增多。这些工艺流程都有其一定的适合条件和优缺点。设计者要根据用户的建设意图及其所具备的建设条件,如原料条件、装置建设所处位置、资金来源、产品要求等,合理地科学地选择适应其建设条件的工艺流程和设备,并从方案比较中扬长避短进行优化设计,为用户提供十分负责的设计图纸,以达到投资少、周期短、效益好的建设目的。3·1生产硫基NPK复合肥工艺流程的选择上述流程1、2、3均生产硫基NPK复合肥,其中流程1、2较…     

硫肥生产技术的开发

正根据云南云天化股份有限公司云峰分公司生产安排,磷肥厂100 kt/a复合肥装置于2017年生产NPK(15-39-8)复合肥产品。根据该装置实际情况,技术人员研发出硫基复合肥。该装置利用管式反应器技术,能够生产磷酸一铵(DAP、GMAP)或多等级的NPK复合肥产品。1硫肥的性能以硫元素为原料生产的硫肥硫含量高,现代肥料先进技术开发了许多适用于直接施用与作为NPKS     

农用硝酸铵改性方案--硝基NPK复合肥装置

针对农用硝酸铵在使用中出现的问题 ,提出了将其改性生产硝基NPK复合肥的方案。阐述了工艺流程和技术特点 ,并以依托硝酸铵工厂的公用工程建设的硝基NPK复合肥装置为例 ,提出了原材料消耗、投资和成本估算 ,认为该方案技术稳妥可靠、产品适应市场需求、投资少、见效快 ,改造期间不影响硝酸铵装置的正常生产 ,经济效益较好     

道康宁-摩力克推出新型阀用润滑剂和密封剂

印度农场主肥料合作社(Iffco)计划在埃及建设一套50万t/a的磷酸装置,以及一座磷矿石矿山,以供应位于印度的现有磷酸装置。Iffco计划投资10亿美元,将化肥产能增加250万t/a,到2008年公司化肥总产能将达到860万t/a。拟建的磷酸厂是Iffco与埃及最大的矿业公司EINasr矿业公司(ENMC)的合资企业,Iffco持股75%。拟建的矿山每年将向印度输出200万t磷矿石,新建的磷酸厂将向Iffco在印度的磷酸二铵(DAP)和三元复合肥(NPK)联合装置供应原料。按照10亿美元投资计划,Iffco还将在坎迪亚建设一套180万t/a的DAP/NPK装置,Iffco在该地区已有一套219万…     

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。