镁资源、镁质化工材料现状与前景

对镁资源、镁质化工材料现状与前景作了评述。介绍了中国镁质资源诸如菱镁矿、水镁石、水菱镁石、白云石、斜方云石、盐湖卤水和海水制盐工业副产--苦卤等。对世界镁化学制品生产企业近期变化和发展情况以及轻烧氧化镁（CCM）与氢氧化镁生产和应用进行了探讨,并展望了其发展前景。     

提高回转窑烧成带耐火材料的耐久性

回转窑用耐火材料使用条件的主要特点在于:窑每转一周,耐火材料都要受到周期性的加热和冷却,一个月回转窑的转动次数大约为4.5×10~4次。而且,耐火材料周期性的温度波动范围达150～200℃。苏联水泥工业回转窑烧成带内衬主要采用的镁尖晶石质耐火材料为铬镁质、镁铬质、方镁石-尖晶石质耐火材料。煅烧白水泥熟料的窑,主要采用尖晶石结合的不含染色氧化铬的镁质耐火材料。其它国家水泥工业则主要推广镁尖     

镁质耐火材料高温蠕变特性的研究现状

介绍了镁质材料高温蠕变特性的研究现状，并对镁质耐火材料的高温蠕变特性的理论进行了阐述，同时指出了将镁质蓄热材料用在高炉热风炉上的可行性。     

镁质耐火材料用结合剂的应用进展

镁质耐火材料被广泛应用于钢铁冶金等领域，其结合剂种类不仅会影响其质量，还会影响其在高温状态下的显微结构和使用性能。综述了镁质耐火材料用结合剂的基本分类，结合剂在镁质不定形耐火材料和镁质耐火材料制品中的应用情况，并对镁质耐火材料结合剂的应用提出了一些建议。     

世界炼钢生产和镁质耐火材料的现状及其发展趋势

探讨了世界炼钢生产、有色冶金及水泥工业等用镁质耐火材料的现状及近10年来的发展趋势。按照资源保护性及符合环保要求的工艺开发了氧气转炉、炼钢电炉、炉外精炼装置、连铸装置、有色冶金及水泥工业用的新一代镁质耐火材料，从而保证了制品的竞争能力。     

《绿色耐火材料》一书出版

<正>本刊讯日前,《绿色耐火材料》一书由中国建材工业出版社出版发行。耐火材料是高温技术工业不可缺少的重要基础材料,是所有高温工业发展的基础,水泥工业的健康发展更离不开耐火材料的技术进步与创新。目前,欧洲、日本、美国等国家和地区由于政府强制规定,已基本不用含铬耐火材料,绿色耐火材料的使用已成必然趋势。强化节能减排,发展绿色、低碳耐材产品,是全球绿色经济战略对耐火材料行业的根本要求。本书通过对目前新型干法水泥工业中耐火材料的选择及使用过程中出现的问题进行梳理与总结,全面介绍了我国水泥工业     

回转窑窑衬用的方镁石尖晶石耐火材料

目前,回转窑烧结带的窑衬使用着镁质尖晶石耐火材料——由镁石和铬铁矿组成的镁铬、铬镁以及方镁石尖晶石耐火材料。镁质尖晶石耐火材料的矿物组成是方镁石、铬尖晶石以及镁橄榄石型和钙镁橄榄石型的镁硅酸盐结合剂。这种组成使其与波特兰水泥熟料发生十分强烈的相互作用。铬尖晶石与熟料剧烈反应,形成铬铁矿、铬酸钙和其它化合物。加之铬质耐火材料在温度1300～1600℃时还会挥发。这些耐火材料的结合剂中含有比     

炉外精炼用耐火材料提高寿命的途径及其发展动向

结合VOD与RH介绍了造成炉外精炼蚀损严重部位的原因。从MgO-Cr2O3、MgO-CaO、MgO-C、MgO-CaO-C、MgO-MgO·Al2O3等耐火材料性能及在精炼中的作用介绍了如何选择耐火材质;从接触角、熔渣粘度、形成高熔点化合物、气孔微细化以及炉渣成分控制、双饱和与精炼温度等方面介绍了提高炉外精炼用耐火材料寿命的途径。最后结合镁铬、镁钙、MgO-C、镁钙碳与无铬耐火材料介绍了炉外精炼用耐火材料的发展动向,并对MgAlON结合镁质耐火材料在炉外精炼中的研究与应用进行了评估与预期。     

印度耐火材料工业的发展现状及前景

介绍了印度耐火材料市场的现状及发展前景,重点关注钢铁和水泥行业的情况。还介绍了印度耐火材料工业的发展现状,如耐火原料资源情况、耐火材料工业生产、进出口以及耐火材料生产企业,在此基础上分析了印度耐火材料工业当前的任务和未来发展前景。     

镁质耐火材料化学分析方法及展望

镁质耐火材料是以MgO为主成分或以MgO与CaO为主成分的一种耐火材料,在工业领域应用广泛。影响镁质耐火材料使用性能的主要因素是其化学组成,因此对镁质耐火材料化学组成的准确检测尤为重要。镁质耐火材料化学组成的检测方法包括传统化学分析方法、电感耦合等离子体原子发射光谱法和X射线荧光光谱法等。本文对以上检测方法做了分析与总结,其中XRF粉末压片法具有操作简单,分析快速,不需要高温加热,无环境污染等优点,比较适合工业生产应用。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。     

Effect of degree of deacetylation of chitin on the properties of chitin crystallites

In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997