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氯乙酸氨解法生产甘氨酸的工艺优化探讨 总被引:1,自引:0,他引:1
本文介绍了氯乙酸氨解法生产甘氨酸的工艺及其优化.通过优化的氯乙酸氨解法,缩短了工艺路线,减少了固定投资,降低了生产成本,提高了生产安全性. 相似文献
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回顾了我国玻璃工业的发展,叙述了节能减排对高温工业的影响,介绍了玻璃工艺进步的方向,详述了玻璃工业用熔铸耐火材料和烧结耐火材料,分析了发达国家耐火行业的动向。最后,结合我国实情和新技术革命的方向,讨论了我国耐火材料行业的发展趋势。 相似文献
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“自2016年开始,祁连山水泥所处甘青藏区域通过错峰生产等行业政策的落地实施,成功化解了甘肃、青海两省水泥行业产能过剩的矛盾,合理缩短了水泥熟料生产运转时间,有效压减了区域过剩产能,改善了区域市场供给关系,节约了能源资源,减少了排放,优化了生态环境,维护了市场生态”。 相似文献
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近年来,各炭素企业为了扩大再生产和替换陈旧设备,相继加快了石墨电极机床数字化改造步伐,不仅降低了操作者的劳动强度,提高了生产效率,而且减少了人为误差,提高了控制精度,保证了加工质量. 相似文献
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针对一台二氧化碳泵密封泄漏严重的问题,分析了密封失效的原因,提供了解决密封泄漏问题的方法,从根本上解决了该泵的泄漏问题,从而提高了泵密封的性能和使用寿命,提高了设备运行的可靠性,取得了良好的经济效益。 相似文献
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The effect of the bond between the matrix and the aggregates on the cracking mechanism and fracture parameters of concrete 总被引:2,自引:0,他引:2
G. V. Guinea K. El-Sayed C. G. Rocco M. Elices J. Planas 《Cement and Concrete Research》2002,32(12):1961-1970
The aggregate–matrix interface plays a leading role in the fracture mechanisms and in the fracture response of concrete. In this work, the influence of the interface on the macroscopic fracture parameters of concrete is investigated. Eleven concrete batches were cast with the same matrix. Different—crushed or rounded—aggregates from the same quarry were used, and several surface treatments were applied to improve or degrade the bond between the matrix and the particles. Fracture tests (three-point bending tests and Brazilian splitting tests) were carried out to determine the fracture energy and other relevant fracture parameters of the concrete batches. The modulus of elasticity and the compressive strength were obtained from uniaxial compression tests. The macroscopic fracture behaviour was modeled by the cohesive crack model with a bilinear softening curve. The results show that concretes with the same matrix and aggregates, and similar behaviour under uniaxial compression, can give very different fracture responses. The work shows how fracture behaviour is governed by the interfacial properties that are also behind the cracking mechanism. 相似文献
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本文研究了柔性机织复合材料及其增强体顶破的破坏形态和失效机理。在MTS-810材料试验机上分别对两种材料进行准静态顶破实验测试,通过观察顶破过程中两种材料变形,指出它们形变的异同点。并对实验得到的载荷—位移曲线进行分析讨论,说明材料在顶破载荷作用下的失效机理以及涂层对织物顶破性能的影响。 相似文献
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Yi Wang Suihuai Yu Jianjie Chu Dengkai Chen Jian Chen 《Journal of the European Ceramic Society》2018,38(10):3681-3688
With copper and iron oxides as colorants, reddish and bluish purple glazes were prepared by changing the raw material ratio at the same firing schedule. Based on the primary factor experiments and the analyses of XRF and SEM/EDS, the fambe mechanism was proposed. The results indicated that glaze colors were related to multiple factors. The difference in copper red and purple glazes was merely caused by the later ingredient containing Ca3(PO4)2, in which liquid-liquid phase separation structures were developed and formed structural colors, while the accumulated Fe2O3 in one phase decomposed to Fe2+ and bubbles to form blue stains and colorful texture. In addition, both CuO and Fe2O3 had a variety of coloring characteristics, which depended on the process parameter, firing temperature and base glaze compositions to make colors and hues change accordingly. In such cases, the multiple chemical colors were coupled with structural colors to form the fambe glaze. 相似文献
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介绍了氮肥企业高压换热器法兰与内套焊接存在的问题,分析了产生焊接裂纹的原因,提出了解决问题的简便办法。 相似文献