中国煤炭企业循环经济的发展

循环经济是一种促使资源环境与经济协调发展的生产模式,是企业实现可持续发展的必然选择。针对煤炭在中国能源中的地位以及煤炭企业发展过程中存在的问题,提出了循环经济的概念,分析了煤炭企业发展循环经济的必要性及可行性,阐明了煤炭企业发展循环经济的重要意义,并结合发展过程中存在的问题提出了相应的建议。     

The use of recycled elastomeric materials for sustainability in circular economy

The use of scrapped elastomeric goods primarily service failed or worn-out tires is a challenging task for the rubber society. To address this issue, recycling and reusing of these tires by different technique bring major relief toward environmental concern. Recycling technology generates secondary raw materials, which are important resources for manufacturing industries and contribute significantly for the sustainability in circular economy. In this work, an effort was made to understand the retention of physical properties as a function of crumb rubber loading and particle size. Four different sizes of cryogenically shredded crumb rubber particles (120, 140, 200, and 270 mesh) were physicochemically characterized and incorporated by 10 phr of each in two different grades of carbon black–filled, natural rubber–based tread compound. The mixed compounds were characterized and compared with the control one. Optical microscope and scanning electron microscope analyses concluded that the finer the particle size, the better is the dispersion of crumb rubber particles which provide superior mechanical, extrusion, and wear properties. Tensile properties were retained around 95%–97% for both 270-mesh loaded compounds, which indicates that reduction in particle size can increase the volume of recycled product utilization.     

走可持续发展道路创循环经济导向的资源加工型企业

介绍贵州宏福实业开发有限总公司在发展循环经济方面所进行的探索和实践。论述其发展循环经济的指导原则、思路和目标。通过积极发展磷化工,综合利用资源,开发高附加值的下游产品,回收利用生产过程的废气、废渣和废热,取得了可喜的成绩。     

循环经济战略在化工行业的应用和发展

系统地分析了循环经济战略在化工行业的应用情况,包括化工行业采用循环经济的重要性,循环经济战略在化工行业的实现模式,以及化工行业循环经济战略的发展现状及存在的问题,并提出相应的发展策略。     

Opportune inward waste materials toward a zero waste ceramic slabs production in a circular economy perspective

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.     

Circular economy and durability in geopolymers ceramics pieces obtained from glass polishing waste

The development of new building materials based on alkaline activation technology is very promising, mainly linked to products that need significant technological properties and durability due to their adverse service conditions and environmental exposure. The objective of this research was to evaluate the development of a circular economy within the scope of durability of ceramic pieces incorporating glass polishing waste aimed at the production of roof tiles, obtained by the geopolymerization process. Two methodologies to evaluate the sample's durability were studied: wetting and drying cycles; and exposure to salt spray; both simulating conditions that tiles typically face in normal conditions. Prismatic specimens were made with an alkaline solution/(metakaolin + waste) ratio = 0.26; a SiO₂/Al₂O₃ molar ratio = 3.5, 4, and 4.5; and with ambient and thermal cure at 7 days. Samples were evaluated in their mechanical strength, mass loss, and water absorption. Results showed that the SiO₂/Al₂O₃ = 4.0 ratio with thermal curing had the best behavior in aggressive conditions, and therefore, this formulation can be used for the production of tiles.     

循环经济战略在日化行业的应用和发展

系统地分析了循环经济战略在日化行业的应用情况,包括日化行业采用循环经济的重要性,循环经济战略在N化行业的实现模式,以及日化行业循环经济战略的发展现状以及存在的问题,并提出相应的发展策略。     

我国煤炭资源产业循环经济发展策略研究

在系统分析的基础上提出煤炭资源产业循环经济发展策略:研发、推广环境友好技术和先进技术包括清洁开采技术、推广和利用水煤浆、先进火力发电技术等进行生产;改变狭义的资源观,用好“废物”资源,如矿井水、煤层气、粉煤灰等;发展煤炭资源深加工,提高产品附加值;行业耦合发展,如煤电联营,提高资源利用效率;大力发展节能技术,减少煤炭资源消耗。并为我国煤炭资源产业发展循环经济的产业政策提出了几点建议。     

从几种典型模式看我国硫酸工业循环经济发展

通过几种典型的模式分析了我国硫酸工业循环经济的特点及构成,提出发展循环经济必须解决专有技术的推广应用及资源、能源、废物的综合利用等问题.建议国家在硫酸工业的循环经济发展上给予政策扶持,硫酸企业要积极推进循环经济的专有技术开发,从而加快全行业循环经济的发展.     

发展矿区循环经济的实践及再认识

从矿区实施循环经济的背景及意义出发,指出循环经济是矿区发展的必然选择,并结合矿区循环经济发展模式的构建,提出了发展矿区循环经济所需的技术支撑;通过对矿区循环经济发展的误区分析,指出矿区发展循环经济要实现从过分注重物质效益向重视非物质化服务功能开发的转变,对矿业生态工业园区建设和构建矿区复合生态系统提出了相关建议。     

加快推进海水利用不断提升石化产业循环经济发展水平

根据我国水资源短缺、而石化行业耗水量大的特点,分析论述了石化行业开展海水利用的必要性和可行性,提出石化产业海水利用应按照循环经济发展思路,实行海水淡化和直接利用相结合、重点发展海水淡化的原则,积极采用水电联产、产用配套的运作模式,以高品质企业用水为突破口,带动企业海水资源综合利用,提高石化行业循环经济发展水平。     

清洁生产及循环经济技术在氯碱生产中的应用

介绍了青岛海晶化工集团有限公司污染物综合治理及利用的情况，说明了清洁生产及循环经济技术在氯碱生产中的意义。     

石化产业发展循环经济产业模式与对策研究

从传统经济模式下资源与环境因素对石化产业发展的制约入手,研究我国石化产业可持续发展的必由之路———循环经济的产业模式,分析了我国石化工业发展循环经济的问题与障碍,进而提出我国石化产业发展循环经济的对策与措施。     

氯碱化工发展循环经济的分析与研究

从循环经济对氯碱行业市场变化、集聚发展、技术革新等方面的作用进行了分析和阐述,指出了循环经济对氯碱行业可持续发展的意义。     

生态屏障地区循环经济生态工业发展模式研究

针对地处青藏高原的西宁经济技术开发区工业发展中存在的问题,提出了西宁经济技术开发区循环经济生态工业发展的思路和框架,以甘河工业园区为例深刻阐述了生态屏障地区开展循环经济生态工业的发展模式。     

循环经济和清洁生产在铜冶炼行业的实践

阳谷祥光铜业有限公司400kt／a高纯阴极铜冶炼原料主要来自国外,各种矿源成分较为复杂。在当前资源紧缺、环保要求日益严格的大环境下,清洁生产和循环经济成为行业的发展趋势。祥光铜业积极使用先进工艺和设备,最大限度地减少气体排放,深化废酸、废水回收再利用。通过污染控制、资源的再利用较好地发展了循环经济,为企业的可持续发展打下良好的基础。     

New waste-based clinkers for the preparation of low-energy cements. A step forward toward circular economy

This paper describes the use of industrial wastes arising from different production processes of the ceramic and marble industries as raw materials for the design and formulation of new cement clinkers with a high content of dicalcium silicate (Belite). The aim was to reintroduce these wastes in the industrial sector and take advantage of them for a greater environmental benefit, as indicated by the principles of the circular economy. Formulations containing 2.5, 5 and 10 wt% of chamotte and marble sludge, respectively, and a waste-free formulation have been designed to obtain clinkers with a content of dicalcium silicate higher than 60 wt%. The different blends have been studied up to a maximum temperature of 1390°C by Thermal Analysis. Other techniques such as XRD, XRF, Modified Bogue Equation, Quality Indexes (LSF, AM, SM) and Optical Microscopy have been used for the study and characterization of industrial wastes, the raw materials and the high belite-type cement dosages. The results indicate that this type of cements can be designed using different types of wastes and in this way reduce the environmental impacts caused by the extraction of raw materials and the deposition of the wastes in landfills, improving the circular economy of the construction industry.     

巨化硫酸厂构建硫铁矿制酸循环经济模式实践

巨化硫酸厂利用公司内部产业链的能源需求、产品互供特点,研究先进适用技术,从物质循环、能量梯级利用、废物资源化等方面大力发展循环经济,建立适合企业特点的硫铁矿制酸循环经济发展模式。实现了吨酸输出能源折标煤135．32kg、总硫利用率97．39％,达到国内同类装置的先进水平,并为同行发展循环经济提供有益的借鉴。     

发挥循环经济网络链优势 实现ADC发泡剂生产废水零排放

利用青海盐湖资源综合利用循环经济网络链的优势,提出该网络主导产品之一的ADC发泡剂生产中废水处理的构想。     

中国镁质耐火原料的发展现状和展望

介绍了中国镁质原料的资源开采情况和中国镁质耐火原料的主要产品及生产现状,提出了镁质耐火原料的发展建议,指出了镁质原料今后的工作任务。