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废旧轮胎回收利用的现状与进展 总被引:3,自引:0,他引:3
废旧轮胎是可以再利用的资源。废旧轮胎循环利用和综合利用水平是一个国家经济发展的重要标志之一。废旧轮胎翻新、加工生产再生胶和胶粉以及废旧轮胎热裂解生产油品和复合炭黑,已经成为我国废旧轮胎综合利用的主要手段。我国废旧轮胎综合利用产业的生产规模虽然尚未达到发达国家水平,但已形成对橡胶工业的有效补充。 相似文献
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根据对目前废旧轮胎的现状,文章从废旧轮胎的直接利用、粉碎为胶粉后利用、再生橡胶、热分解、燃料利用五个方面分析废旧轮胎循环利用的主要途径。 相似文献
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5月中旬,在中国橡胶工业协会废橡胶综合利用分会秘书处的周密安排和大力配合下,国务院新闻办公室五洲传播中心“废旧轮胎循环利用专题片”摄制组在南京东浩胶粉有限公司、南通回力橡胶集团有限公司、福建三明环科橡胶科技有限公司,对弹性体废旧橡胶经过分理、清洗、粉碎、脱硫、 相似文献
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介绍废旧轮胎综合利用情况。美国是最发达的轮胎翻新国家,我国的轮胎翻新率目前仅为4.5%。世界翻新轮胎工业正在向发展中国家转移。美国废轮胎胶粉主要用于体育场和游乐场胶板及公路用沥青改性,我国废轮胎胶粉在这些方面的应用已逐渐展开。我国再生胶工业快速发展,再生胶产量已居世界第一,再生胶的生产工艺技术和装备技术等已达到世界领先水平。构建废旧轮胎回收利用法规和规范废旧轮胎回收及其产品应用市场是废旧轮胎循环利用行业发展的重点。 相似文献
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为解决废旧轮胎处理难题,实现综合利用,山东枣庄亿正橡胶有限公司拟利用废旧轮胎实施年产10万吨精细改性胶粉及橡胶制品项目。 相似文献
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世界各国的废旧轮胎数量日益增加,废旧轮胎堆放不仅造成环境污染,还导致橡胶资源浪费,对废旧轮胎进行合理的回收利用已经势在必行。现阶段,粉碎废旧轮胎以制备胶粉因工艺优势而成为废旧轮胎的主要回收方式。综述国内外粉碎废旧轮胎制备胶粉技术,详细介绍干法粉碎和湿法粉碎技术及相关工艺,其中干法粉碎包括常温和低温粉碎,湿法粉碎主要包括RAPRA法、常温浸混粉碎法、全水相法和高压水射流冲击粉碎法。对主要粉碎设备及其粉碎原理进行概述。指出全水相法因制得的胶粉性能更加优异,且工艺成本低及环保性表现突出,有望成为未来废旧轮胎粉碎技术主要发展方向。 相似文献
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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。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献