晋宁450万t/a磷矿选矿厂设计方案比较探讨

在分述晋宁磷矿、昆阳磷矿、昆阳磷矿与晋宁磷矿混矿(2:1)选矿试验概况的基础上,对破碎方案、选别方案、精矿指标、选矿经济效益等进行了比较,结果表明:昆阳、晋宁磷矿分别选别要比昆阳、晋宁磷矿混矿选别优越.     

滇池地区中低品位胶磷矿重浮选矿试验研究

根据滇池地区晋宁、昆阳、海口中低品位胶磷矿的矿物特性,确定以重浮联合流程选别中低品位胶磷矿。结果表明：利用重选预选减少入浮选量一定程度上降低了选矿成本,减小了浮选对环境的污染。     

大峪口难选胶磷矿无碱浮选工艺

为降低大峪口难选胶磷矿浮选工艺成本,将抗硬水性和溶解性较好的表面活性剂复配作为捕收剂,结合对浮选药剂制度和流程的优化,探讨了用不加碳酸钠的常温正反浮选工艺分选大峪口低品位胶磷矿的可行性。试验结果表明,采用正浮选1次粗选、反浮选1粗1扫开路流程,可获得混合磷精矿P2O5品位28.66%、综合产率52.06%、综合回收率78.81%的浮选指标。该工艺流程简单,采用常温无碱浮选工艺,成本较低。     

晋宁低品位胶磷矿配矿浮选利用研究

为经济合理利用晋宁低品位胶磷矿,将其与昆阳高碳酸盐型胶磷矿配矿后浮选.在昆阳高碳酸盐型胶磷矿与晋宁低品位胶磷矿按质量比4配矿后,经过一粗一精一扫反浮选工业生产获得精矿w(P2O5)29.32％、w(MgO)0.88％、产率69.40％、P2O5回收率92.98％,尾矿w(P2O5)6.72％的选矿指标.     

云南会泽中低品位胶磷矿选矿工艺对比研究

根据矿石性质,分别采用单一反浮选、双反浮选和正反浮选3种流程选别云南会泽磷矿,结果表明3种工艺均能取得较好的选矿指标,为云南会泽磷矿的开发开辟了新的途径.     

宜昌丁东磷矿选矿试验研究

对宜昌丁东磷矿进行了浮选、重介质选矿及重介质选矿 浮选流程实验室小型试验,试验结果的技术、经济和环保分析表明:此矿宜采用正反浮选选矿方法及流程.     

根据磷复肥用矿质量要求选择磷矿选别工艺

介绍主要杂质为碳酸盐、硅酸盐和倍半氧化物的钙硅质胶磷矿,采用不同选别工艺所需正反浮选药剂用量及所得精矿组成,并评述各种选别工艺优缺点。建议应根据磷复肥用矿质量标准确定选矿工艺流程,避免优矿低用,提高磷资源的利用率：     

云南昆阳磷矿中低品位磷矿选矿应用研究

按照云南磷化集团公司发展定位,“十一·五”期间,将在云南晋宁建设年处理450万t／a的选矿装置。由于该选厂规模大,矿石来源复杂,工程设计和建设需要可靠的试验资料和技术参数。本文重点介绍为建设晋宁450万t／a浮选装置所进行的昆阳磷矿选矿技术研究成果,通过系统的试验研究开发,为昆阳磷矿中低品位磷矿浮选开发利用提出了合理的工艺技术路线和方案,也为晋宁450万t／a浮选厂建设提供了工程设计依据和技术参数。     

瓮福磷矿穿岩洞矿段磷矿石选矿研究

对瓮福磷矿穿岩洞矿段混合磷矿石进行了直接浮选、单－反浮选、反－正浮选和正－反浮选４种工艺流程的选别试验,结果表明,采用正－反浮选和反－浮选工艺处理该磷矿石,均可取得较好的试验指标。综合评价推荐的流程是正－反浮选流程。     

反浮选脱硅捕收剂研究

在常温条件下采用反浮选碳酸盐—脱泥—反浮选硅酸盐的双反浮选工艺对海口磷矿Ⅰ、Ⅱ采区原生矿进行了选别试验。第二段反浮选用新研制的ＳＬ－２０阳离子捕收剂获得了较理想的分选效果。     

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。