共查询到20条相似文献,搜索用时 156 毫秒
1.
从循环经济的角度阐述了如何将产生的废旧轮胎进行充分及时的回收利用,这对缓解我国橡胶资源匮乏,促进国民经济可持续发展,带动相关产业发展具有重要的作用。 相似文献
2.
介绍了当今美国及加拿大在回收处理废旧轮胎方面的最新信息。说明了美国南北几个不同的州处理和利用旧轮胎作电厂和水泥厂燃料的情况,以及利用粉末橡胶改性沥青的方法和意义。简要介绍了硫化橡胶脱硫的新方法。对我国发展汽车工业所产生的副产物-废旧轮胎的合理利用、保护环境、寻找新的可利用的能源有一定的借鉴价值。 相似文献
3.
4.
5.
概述国内外废旧轮胎的回收利用现状,提出我国废旧轮胎回收利用的发展建议。目前废旧轮胎综合利用途径主要包括翻新、再生胶、胶粉、热能利用和热解等,美国、芬兰、英国和日本等发达国家主要以生产胶粉、热能利用和热解等为主;我国废旧轮胎回收利用水平较低,轮胎翻新率远低于发达国家,再生胶产量大,胶粉产量较小。建议我国调整产品结构,以生产胶粉为主,并积极开拓废旧轮胎回收利用新途径,提高废旧轮胎回收利用水平。 相似文献
6.
7.
8.
9.
10.
世界废旧轮胎综合利用纵览 总被引:4,自引:0,他引:4
汽车给人们带来了交通便利,公路运输促进了国民经济的发展。但我们在享受便利和品尝经济发展的成果时,不得不面对日益增多的废旧轮胎。据统计,目前全世界每年有15亿条轮胎报废,其中北美大约4亿条,西欧近2亿条,日本1亿条。如何将废旧轮胎资源化、减量化、无害化,不仅关系到环境保护这个重要的社会问题,而且还关系到持续发展这一全球性的战略问题。合理处置废旧轮胎,长期以来一直是环境保护的难题。在上世纪90年代,世界各国最普遍的做法是对废旧轮胎进行掩埋或堆放。以美国为例,1992年废旧轮胎掩埋/堆放率达到63%,… 相似文献
11.
废胎胶利用现状和加工技术 总被引:4,自引:0,他引:4
介绍了废胎胶利用现状和加工技术进展。国外废胎胶主要用于制能、道路建设、热裂解制轻馏份油、液体燃料和炭黑等,发达国家已不再发展废胶脱硫生产再生胶。我国废胶利用每年为16~20万t,且几乎全部用于橡胶加工行业。另有60%的废胶应开发新的应用领域。 相似文献
12.
13.
14.
产业化制备镍钴锰酸锂有4种工艺,包括定向循环、传统湿法回收、传统火法回收和原矿冶炼。为了寻找环境影响程度最小的生产工艺,采用Eco?鄄indicator 99评价体系对4种工艺进行生命周期评价。结果表明,生产
1 000 kg镍钴锰酸锂,定向循环、传统湿法回收、传统火法回收和原矿冶炼环境指标分数分别为-11 883、-1 552、57、25 896,回收废旧电池社会意义显著。因此,从环境影响的角度选择镍钴锰酸锂三元材料的生产工艺应优先采用定向循环工艺,原矿冶炼工艺因其环境损害最大,不提倡使用。 相似文献
15.
Rajiv R Srivastava Sadia Ilyas Hyunjung Kim Sowon Choi Ha B Trinh Muhammad A Ghauri Nimra Ilyas 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2020,95(11):2796-2810
Critical metals are key raw materials for new generation clean energy production. The extraction of critical metals often follows the difficult processing of primary ores and they are many times recovered as the companion metals. With the depletion of primary reserves, the focus has now shifted to processing the urban mines, like electronic (e-)waste. Among the different types of e-waste, the waste printed circuit boards (WPCBs) are the major reservoir of high-value critical metals and are usually treated by the traditional pyro- and/or hydro-metallurgical techniques. However, the application of microbial activities in metals recycling is rapidly emerging as a green technology in comparison to smelter or chemical processing. The application of microorganisms (bacteria/fungi) in WPCBs’ recycling is being increasingly explored in order to meet the parallel objectives of resource recovery and pollution mitigation. Therefore, the present article assesses the current frontiers in bioleaching of critical metals from WPCBs and contains discussions on process fundamentals, challenges, and perspectives. The applicability of microbial recycling of WPCBs at a higher scale in terms of a circular economy and urban mining notion, the techno-economic analysis, and environmental sustainability in comparison to the chemical processing route are also discussed. © 2020 Society of Chemical Industry 相似文献
16.
本文基于热平衡和气固换热原理,以篦冷机为研究对象,建立了篦冷机余风再循环计算模型,分析了水泥窑余热发电系统余风再循环技术。当余风再循环系统运行时,篦冷机中部冷却空气温度对水泥窑余热发电系统和篦冷机运行均有一定的影响。随着冷却空气温度的升高,AQC锅炉取风温度及余热发电功率升高;但篦冷机出口熟料温度、余风温度、冷却空气阻力以及冷却风机功率也会增加。综合而言,余风再循环技术具有实际可行性,但是经济性具有不确定性。 相似文献
17.
18.
Consuelo Mugoni Roberto Rosa Vito A. Remigio Anna Maria Ferrari Cristina Siligardi 《International Journal of Applied Ceramic Technology》2020,17(1):32-41
This work is related to the preliminary lab-scale preparation of ceramic slabs, reproducing the characteristics of natural stones, containing up to more than 40 wt.% of different waste materials, namely laboratory glass, cullet glass (both thought as fluxing agents replacing feldspar), and ceramic waste obtained from drying squaring operations (for partial quartz sand replacement). Indeed, in order to pursue the circular economy principles, the possibility of turning different kinds of wastes into resources for the ceramic industry, surely represents the first concern to be addressed and demonstrated, with also the aim to reduce the environmental impact associated with landfill, minimizing manufacturing cost and contributing to preserve nonrenewable natural resources, which are known to be consistently depleted by the ceramic industries. 相似文献
19.
20.
The pyrolysis of scrap automotive tyres: The influence of temperature and heating rate on product composition 总被引:4,自引:0,他引:4
Shredded automotive tyre waste was pyrolysed in a 200 cm3 static batch reactor in a N2 atmosphere. The compositions and properties of the derived gases, pyrolytic oils and solid char were determined in relation to pyrolysis temperatures up to 720 °C and at heating rates between 5 and 80 °C min−1. As the pyrolysis temperature was increased the percentage mass of solid char decreased, while gas and oil products increased until 600 °C after which there was a minimal change to product yield, the scrap tyres producing approximately 55% oil, 10% gas and 35% char. There was a small effect of heating rate on the product yield. The gases were identified as H2, CO, CO2, C4H6, CH4 and C2H6, with lower concentrations of other hydrocarbon gases. Chemical class composition analysis by liquid chromatography showed that an increase in temperature produced a decrease in the proportion of aliphatic fractions and an increase in aromatic fractions for each heating rate. The molecular mass range of the oils, as determined by size exclusion chromatography, was up to 1600 mass units with a peak in the 300–400 range. There was an increase in molecular mass range as the pyrolysis temperature was increased. FT-i.r. analysis of the oils indicated the presence of alkanes, alkenes, ketones or aldehydes, aromatic, polyaromatic and substituted aromatic groups. Surface area determination of the solid chars showed a significant increase with increasing pyrolysis temperature and heating rate. 相似文献