浅谈新型干法窑生产中的一些体会

回转窑是新型干法生产的中心设备。要正确地操作回转窑，达到优质、高产和低消耗的目的，须从配料、窑衬选用及工艺过程等多方面综合控制。包括应根据原料资源和生产工艺条件确定合理的配料方案；选择窑衬要根据系统的结构和功能要求，对不同的带选择合适的耐火材料；工艺操作方面，窑头和分解炉要兼顾好风、煤、料及窑速的平衡，稳定篦冷机的操作等。     

玻璃全电熔窑的烤窑

论述了玻璃全电熔窑烤窑步骤及烤窑过程中每个步骤应做的主要工作和应注意的问题.其中详细介绍烤窑前期电极、窑炉结构、耐火材料检查要求及配套系统的准备工作,烤窑过程中升温、加料阶段具体工作步骤及要求,最后指出资料整理的重要性.     

洛阳水泥厂1000t／d预分解窑耐火材料低消耗情况介绍

洛阳水泥厂１０００ｔ／ｄ预分解窑耐火材料全部由国产耐火材料配套，在３年多的使用中，与同类型生产线相比，消耗量低，技术经济指标较理想，本文对此了详细分析和介绍。     

预分解窑红窑的分析与处理

简体扫描仪观测，筒体的局部温度大于350℃，此时应结合窑筒体的实际情况来判定是否红窑。夜间可发现筒体出现暗红或深红；白天则发现红窑处筒体发白有“爆皮”现象，用扫帚蘸上柴油扫该处可燃烧，如不能及时断定可等到夜间观察是否出红。     

1 000 t/d预分解窑系统耐火材料配套使用情况的探讨

介绍了１０００ｔ／ｄ新型干法窑耐火材料配套使用的实践经验，并对目前耐火材料存在的问题进行了探讨。     

新型干法窑烧成带长度的确定

新型干法窑窑内温度高、窑径大、转速快，降低了全窑耐火材料的使用寿命。一般情况下，窑内耐火材料最易损坏的部位是烧成带末端，即主窑皮不稳定而浮窑皮变化频繁的位置。实践证明，这一位置不宜使用碱性耐火材料，特别是镁铬砖损坏最快，而应采用耐磨且抗热振性好的耐火砖。其位置的确定，实际上就是确定窑内烧成带的长度。对于同一窑型、同一燃烧器下烧成带的长度，在实际生产中是变化的，如何确定并控制好烧成带的长度，是一个值得探讨的问题。１合理确定烧成带长度的几种方法１．１根据投料量确定烧成带长度投料量的多少与窑转速快慢、…     

窑车轴承润滑脂的试验

1.前言隧道工业窑炉是建筑陶瓷、砖瓦、工业耐火材料及工业电器陶瓷等行业的重要生产设施,窑炉内焙烧温度一般可达1300～1700℃。窑车是装载坯件在窑内焙烧的关键设备,它要在重载高温下,低转数长期工作,由于窑温的辐射和窑车本身的热传导,经过隔热后,车下轴承部位温度仍达约150～300℃。目前大部分窑车用65~#汽缸油或复合钙基润滑脂,在高     

1800℃高温罩式窑的研制

本工作成功地开发了高温罩式窑。该窑结构设计独特、密封形式新颖巧妙 ,适用多种燃料(重油、柴油和LPG)。与其他间歇式窑炉相比 ,该窑使用温度最高达 186 0℃ ,窑温均匀 ,能快速升温(9h升至 180 0℃ ) ,密封可靠 ,装备水平较高     

预分解窑升温投料的操作与控制

对预分解窑来说，升温投料一定要把握好以下几点：投料前烧成带和投料时分解炉出口气体的温度、投料时的窑速、喂料量的大小和加料幅度、窑尾排风机的风量等。本文就这几个方面谈谈笔者的体会。     

新砌筑耐火砖烘窑期间掉砖原因

很多水泥企业都碰到过新砌筑的耐火砖在烘窑期间掉砖问题:使用专业的维修队伍、专用工具、优质耐火材料,可是新砌筑的耐火砖在升温接近尾声,即将投料的过程中却出现了掉砖事故,严重时进窑后发现许多耐火砖存在环与环严重扭曲、倾斜的现象,无奈只能重新冷窑,重新补砖,这种问题在以往使用笨重落后的螺旋丝杠时都不曾出现。先不说这种极冷极热对耐火材料使     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

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.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。     

ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究

建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。