铬绿呈色及色调变化的研究

本文研究了不同工艺所生产铬绿的呈色情况,并就合成铬绿中辅料、矿化剂对其呈色及色调的变化的影响作了探讨     

行星螺杆挤出机实践

介绍了行星螺杆挤出机设计,制造中一些重要技术参数的确定以及实践中一些有益尝试。     

MOCA的质量及现状

介绍了ＭＯＣＡ的质量指标、性能、应用及现状。     

对工业用水降硅处理的探讨

通过小试和工业试验找到了降低工业水中胶体硅的最佳药剂配方,即为聚铁兼投ＰＡＭ,取得了较满意的效果。     

Cycle time predictions for the rotational molding process with and without mold/part separation

We present a detailed theoretical heat transfer model for the entire rotational molding process (including heating and cooling stages) and identify the key dimensionless groups affecting the process cycle time. This theoretical model is employed to generate numerical results that are in very good agreement with the experimental data available in the literature. The effects of variations in the dimensionless groups on the cycle time are evaluated. In addition, part shrinkage has been incorporated in the models, and its effect on the process cycle time has been studied extensively.     

世界水泥工业除尘之趋向(三)

3 对气箱脉冲与脉冲喷吹除尘器的认识与小议 气箱脉冲除尘器(Plenum Pulse)发展极为短暂,可谓昙花一现。在美国80年代由富乐公司(Fuller)开发使用的气箱脉冲除尘器,数年之内被广大用户证实了其除尘效率低下,且耗能较大,很快被淘汰,又为脉冲喷吹除尘器(PulsePleat)代替。那么气箱脉冲除尘器为什么在国内有较大的影响力?这可能与中国引进外国技术的历史背景有关。80年代我国向外国引进技术,正值富乐公司试制这一种新产品,而且宣传得火红的时候。这一势头虽然以后在美国等地衰减了下来,国内已将其“消化吸收”,变成了有“特色”的技术。 根据观察与长期使用经验,脉冲喷吹除尘器比气箱脉冲除尘器拥有相当的优势,大致归纳一下:     

原子吸收光谱法间接测定水泥中SO3

用铬酸钡沉淀硫酸根置换出定量的铬酸根,原子吸收光谱法测定铬间接测定SO3。该方法的特征灵敏度为0．20μg／ml／1％,线性范围为0～30μg／ml,通过在标准曲线中加入基体,消除离子强度对沉淀转化率的影响,用于水泥中SO3的测定,结果的准确度和精密度令人满意。     

AS—USEAF系统脱氮运行条件试验研究

本文采用正交优化试验法对活性污泥法－上向流间歇膨胀缺氧生物滤泥系统脱氮的最佳运行条件进行了研究。研究表明,该系统的最佳运行条件为：ＨＡＲＴ曝为６ｈ,ＨＲＴ滤为２．７６ｈ,在此条件下,系统进行稳定,脱氮性能良好,ＣＯＤＣｒ去除率达８７．２％,ＮＯ＾－Ｘ－Ｎ去除率达７６．４％。     

化学法制备可膨胀石墨中KMnO4等氧化剂氧化特性的比较研究

选择KMnO4、浓HNO3及H2O2进行插层处理．依据它们在等摩尔数条件下插层产物的微观结构及膨胀倍数的测定结果,对这三种氧化剂的氧化特性作了比较和分析。     

New silicate-based powders for fire protection of thermoplastics

A new, intumescent powdered silicate additive for plastics (polyethylene and polyvinyl chloride) has been investigated that gives improved flame retardancy. Cone calorimeter evaluations of the compounds of polymer/powder show reduction in peak rate of heat release, total heat release, and rate of mass loss. The effects of various polymer/powder ratios and powder particle sizes on the fire protection performance are shown. The morphology of this powder and the polymer/powder compounds before and after combustion is observed. A fire-protection mechanism is discussed that suggests the importance of an interpenetrating char structure.