天津洪大伟业钢铁炉料有限公司

天津洪大伟业钢铁炉料有限公司是天津滨海英驰集团公司所属全资子公司,注册资金1000万元,现有员工40多人,年回收加工废钢15万t、营业额4亿元;2007年10月28日投资建设废钢破碎生产线,2008年5月开工生产。仅6—9月份就加 工废钢超过5万t。     

基于Profibus-DP的废钢破碎线控制系统设计与实现

江苏鼎豪再生资源设备有限公司2012年成功开发了大型废钢破碎线,采用PLC并基于Profibus-DP总线构成监督控制与采集（SCADA）系统。用模糊控制思想实现了破碎机的自动加料控制,并采用组态软件WINCC开发了操作、监控界面,在控制室实现了对整条破碎生产线进行控制与监控。     

天津洪大伟业钢铁炉料有限公司

天津洪大伟业钢铁炉料有限公司是天津滨海英驰集团公司所属全资子公司，注册资金1000万元。现有员工40多人，年回收加工废钢15万t、营业额4亿元；2007年10月28日投资建设废钢破碎生产线，2008年5月开工生产。仅6—9月份就加工废钢超过5万t。洪大伟业公司在天津市供销合作总社和天津滨海英驰集团公司的领导下，与天津天钢集团有限公司建立了紧密合作伙伴关系，成为其主要废钢供应基地。总经理赵洪伟愿与再生资源行业同仁密切合作、共同发展!     

安徽省首条废钢铁破碎生产线在合肥投产再生资源回收利用迈向精细化

2011年12月26日，在合肥市南淝河滨河路皖中再生资源示范基地，安徽省第一条废钢铁破碎生产线顺利投产。 该生产线投资约1000多万元，年可回收处理废钢10万t。通过这条废钢铁破碎生产线，可以对废钢进行分拣、粉碎，将黑色金属、有色金属、非金属废物分离，使废钢纯净化，提高钢水质量，降低炼钢成本。而夹在非磁性物质中的铜、铝等有色金属挑选出来，又提高了回收效益。从难以处理的废钢铁，变成可为钢厂直接使用的优质炼钢原料，该生产线的投产标志着安徽省再生资源回收利用迈上新台阶，由低水平、粗放型生产，逐步向精细化、深加工方向发展。     

我国废钢应用前景及加工设备市场容量分析

简要介绍废钢特点、来源及其应用的优越性,并分析了制约我国废钢大量应用的原因;对废钢产业的市场前景进行分析展望,并以废钢破碎线为例,对废钢加工设备的市场容量进行分析;同时也指出废钢市场可能存在的一些风险因素。     

宜昌力帝机床公司生产的首台国产大型废钢破碎生产线在广州番禺落户

国家重大装备国产化创新研制项目“废钢破碎分选输送生产线”经宜昌力帝机床公司科研技术人员和全体员工的共同努力,并充分利用现代科技和信息技术,在短短一年时间里研制成功.他们结合中国国情研制出的国产首台大型废钢破碎生产线,前不久在广州番禺鸿兴废钢破碎中心落户并正式投入运行.经过几个月的试运行,各项技术指标均达到设计规范要求,每小时可破碎合格炉料达25吨以上,效益十分显著,受到用户一致好评. PSX-6080型废钢破碎分选输送生产线,全长75.4米,高11.5米,宽35.1米,它由废钢破碎机,磁力分选装置和输送机等几大部分组成.它可处理报废汽车、废弃的家电和金属打包块等适合破碎加工的废钢铁,并可实现铁金属和有色金属及垃圾的自动分选.废钢破碎生产线是冶金行业实现精料入炉,降低能耗,提高钢材质量的重要设备,市场前景良好.宜昌机床公司将充分利用国家对报废汽车处理和对环保产业的一系列优惠政策,调整产业结构,依靠科技,进一步开发大型环保机械产品,为我国废钢工业的发展做出应有的贡献. (刘正平)     

金融危机下我国废钢供求回顾与展望

国际金融危机对我国废钢市场影响巨大,市场需求萎缩,价格急剧下跌.总结回顾了2008年我国废钢市场回收、消费概况及其主要特点,并对2009年我国废钢回收量、价格走向以及再生资源增值税政策的调整实施等相关问题进行分析讨论.     

对废钢产业的再认识

回顾了我国废钢产业的形成和发展历史,分析了我国不同时期废钢产业的存在形态,指出我国未来一定时期,钢铁工业对废钢的需求依然强劲,作为朝阳产业的废钢产业将具有巨大的发展潜力。     

废钢消费首现负增长的思考

2012年中国炼钢用废钢量10年首现负增长.介绍了我国废钢消费现状,分析了导致废钢消费出现负增长的原因,并在此基础上提出了促进废钢消费的政策建议.     

我国废钢产业发展概况及前景展望

对我国2009年废钢供求状况、行情及我国废钢产业的发展进行回顾,展望了2010年国内废钢市场的发展前景,指出2010年我国废钢资源依然紧缺,不利于钢铁产业节能减排;新税收政策的实施以及中小钢铁企业的恶性竞争也是造成我国废钢资源紧缺的根本原因。     

Note From the Publisher and the Editor-in-Chief

Water, Air, &; Soil Pollution: Focus -     

落实工作任务 推进农业再生资源利用工作

农业再生资源是再生资源的一个特殊而重要的组成部分,开展农业再生资源回收利用是再生资源产业向新领域的拓展,是助农增收、为"三农"服务的有效途径,是事关新农村建设的重要课题。本刊根据2009年12月18日中再生协会农业再生资源利用专业委员会成立大会暨2009年海峡两岸农业再生资源综合利用研讨会上的相关资料,刊发一组领导讲话,以使读者了解和认识实施农业再生资源回收利用的现实背景和重大意义。     

Adapting the Speciation of the VOCs Emission Inventory in the Greater Athens Area

An adaptation procedure of a new emission inventory of theGreater Athens Area is attempted, based on a sensitivityanalysis on the treatment of the VOC emissions. Throughthis procedure the impact that a more detailed treatment ofthe VOCs emissions might have on the atmospheric chemistrysimulations, is examined. For this analysis three differentchemical mechanisms were applied for two differentlocations (urban and city plume) with different VOC andNO_x mixture characteristics. Finally, this studyrecommends new carbon fractions, reflecting the localconditions in Athens basin.     

Oil Spill Modeling towards the Close of the 20th Century: Overview of the State of the Art

The state-of-the-art in oil spill modeling is summarized, focusing primarily on the years from 1990 to the present. All models seek to describe the key physical and chemical processes that transport and weather the oil on and in the sea. Current insights into the mechanisms of these processes and the availability of algorithms for describing and predicting process rates are discussed. Advances are noted in the areas of advection, spreading, evaporation, dispersion, emulsification, and interactions with ice and shorelines. Knowledge of the relationship between oil properties, and oil weathering and fate, and the development of models for the evaluation of oil spill response strategies are summarized. Specific models are used as examples where appropriate. Future directions in these and other areas are indicated     

欧盟包装废物管理和总体产生特性分析

欧盟旱在1994年就颁布了包装和包装废物的指令,提出了包装废物管理的目标和管理内容,要求各成员国采取积极的经济和法律措施,建立自由流通的公平市场秩序。通过研究评估表明,包装和包装废物指令的实施产生了多方面的积极影响。统计数据表明,历年包装废物回收总量平稳增加,处置量平稳下降,单位GDP产值产生包装废物的系数基本保持稳定,但各国包装废物人均产生量存在较大差异。     

On the Methods for the Delimitation of Seasons

It is well known that air pollution is one of the major factors affecting human health and the activities in a town. Among the various air pollutants an interesting one, especially for sunny climates, is the reactive O₃. O₃ varies significantly through the year; it is therefore very important to know the onset and the duration of the warm period of the year since at that time O₃ concentrations increase significantly. In this work, an attempt was made to determine the onset of warm season of the year as well as its duration in various sites located in Northeastern Mediterranean. For this purpose, a fuzzy clustering method is used. The method was applied on the isobaric thickness between 1000 and 500 hPa for the period from 1974 to 1997. The results were compared to conventional methods based on synoptic classification and were found to be in good agreement.     

Comparative Thermodynamic Study on the Contribution of the Autocondensation and Copolymerization Reactions for the Tannins of the Subspecies of Acacia nilotica

Autocondensation and copolymerization reactions of the Acacia nilotica subspecies tomentosa (Ant) and the subspecies adansonii (Ana) tannins extracts solutions have been studied at several pH values by thermomechanical analyzer. Results of chemical analysis of these tannins revealed that the studied tannins, Ant and Ana contained high percentages of extractable tannins (54 and 57 %) for and polyphenolic materials (78 and 80 %) respectively. Different hardeners such as paraformaldehyde, Urea and pMDI were added at different ratios and their polycondensation reactions was studied and compared with their autocondensation ones. The aim was to evaluate the tannins suitability for the production of commercially and technically viable tannin adhesives with reduced Formaldehyde emission for wood products and to study the interference between the autocondensation and the copolymerization reaction. The obtained results of autocondensation reaction for both of the tannins studied showed that the best Young’s modulus values for Ant (3,500 and 2,750 MPa) and Ana (2,650 and 2,620 MPa) were obtained at pH 5 and 7. The Young’s modulus values obtained by the tannins Ant were higher than those achieved by Ana. This indicates that the Ant is more reactive than Ana. These results were also in line with results achieved by the gel time for both of the tannins. Gel time results indicate that the reactivity of both tannins increased towards alkalinity with Ana being more reactive at alkaline pH. Addition of 8 % of paraformaldehyde was adversely affecting the autocondensation reactions, as the best Young’s modulus values were achieved at pH 4 for Ant tannins. As for Ana the higher Young’s modulus values (2,000 and 2,310 MPa) were achieved at pH 5 and 7. This indicates that autocondensation reaction was contributed to the final network of the copolymerization reaction. When smaller ratio of paraformaldehyde and Urea (5 %) was added to Ant tannins it favors the autocondensation reaction and the best Young’s modulus values were obtained at pH 5 and 7. Addition of pMDI (10–30 %) was found to decrease the temperature of copolymerization and the obtained Young’s modulus values by Ant were lower than those obtained by autocodensation reaction. Best Young’ modulus values were obtained by Ant at pH 5 and 7. Ana gave the best Young’s modulus values at pH 4 and 5 indicating that the autocondensation appears to depress the copolymerization reactions. The obtained results by both reactions were very important from technical and economical point of view as they concluded that it is very possible to produce adhesives system with zero emission depending on the tannins autocondensation reaction and pH values. Reduction of formaldehyde emission was also possible upon addition of smaller amount of paraformaldehyde and Urea.     

日本包装废物管理体系和产生特性分析

介绍了日本的资源循环法律体系和促进容器包装分类回收和再商品化的法律和有关方针,介绍了日本容器和包装的管理体制和主要措施,以及各类包装废物回收利用状况和特点。