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通过汽车外覆盖件修边铁屑的整改实例,从铁屑产生的机理出发,运用基础数据对比及光学显微拍照等技术,研究了刃口间隙对铁屑的影响机制、废料切刀结构优化的技术要求、分序修边结构优化及防止铁屑产生的方法,对汽车外覆盖件修边类模具设计及调试整改提供参考作用。 相似文献
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阐述了普通修边模的基本结构,重点介绍了二次废料切刀的结构设计、应用范围、注意事项及工作过程。设计的二次废料切刀在传统废料切刀基础上进行了改进和创新,有效减少了汽车外板件修边时容易产生铁屑和毛刺的问题。 相似文献
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通过模具刀口铁屑的整改实例,从铁屑压伤产生的机理出发,运用刀口良品条件检查修正刀口、增加修边工序等减少铁屑产生,通过原使用二级废料切刀、增加吹气装置、增加压料板及下模型面藏屑孔等减少碎屑对制件压伤,同时,结合生产刀口损坏周期,不断完善模具点检保养周期,将刀口维持在良品状态,进一步管控修边铁屑压伤产生,提高制件生产品质,降低制件生产成本。此模具修边刀口铁屑解决方法对汽车修边类模具设计及调试整改提供参考作用。 相似文献
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介绍了一种汽车外覆盖件废料切断新工艺,包括改变传统废料工艺设计,降低下模废料切断刀高度,在修边完成废料下滑后先由挡料销暂存,下一个冲次将其切断排出模具外,达到自动化生产和提高制件表面质量的目的。 相似文献
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2012年我国废钢铁市场低迷,供需两弱,废钢铁应用总量自2000年以来第一次出现负增长,废钢比大幅度下滑,跌人谷底,创历史新低.废钢铁回收利用市场进入了一个真正的寒冬期,形势严峻.
我国废钢铁利用下滑的主要原因,除欧债危机持续发酵及美国经济疲软,全球大宗商品系统性风险全面爆发等世界经济危机的影响外,我国经济的不景气(2012年中国GDP增长率为7.8%、创2000年以来最低),钢材市场长期低价运行,需求市场疲软,钢铁原料配置不合理,环保违法成本过低,政策引导乏力等都是造成2012年废钢铁回收利用下滑的主要刺激因素. 相似文献
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Recycling automotive magnesium scrap 总被引:6,自引:0,他引:6
G. Hanko H. Antrekowitsch P. Ebner 《JOM Journal of the Minerals, Metals and Materials Society》2002,54(2):51-54
Magnesium die castings have been experiencing tremendous growth in the automotive market for ten years. The European guideline
for disposing of old automobiles has had a lasting effect on magnesium recovery and recycling. This article will review the
European guideline for automobile disposal and the current technologies used to recycle magnesium scrap from automotive components. 相似文献
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Rhenium is a refractory metal and is one of the rarest elements. Due to its high cost, recycling of rhenium-containing scraps is of economic interest. This paper pertains to the recycling of rhenium from tungsten–rhenium wire scrap generated in the manufacturing of W97Re3 wire. Rhenium from wire scrap, which contained 3.1–3.4% Re, was volatilized at 900 °C in the presence of air at 2 L/min in a tube furnace according to the following equation: 4Re + 7O2 → 2Re2O7 (g). Volatilized Re was solidified on the inner surface of the tube and was recovered as ammonium perrhenate (NH4ReO4) solution after washing the tube with dilute ammonium hydroxide solution (Re2O7 + 2NH4OH → 2NH4ReO4 + H2O). Ammonium perrhenate solution was crystallized to obtain ammonium perrhenate crystals which were free of tungsten and other metal impurities. First pass yield of rhenium recovery was 65.1%. Ammonium perrhenate crystals were reduced in hydrogen at 400–700 °C to obtain Re-metal powder: (2NH4ReO4 + 7H2 = 2Re + 8H2O + 2NH3). Rhenium metal powder obtained from the W–Re wire scrap was blended with non-sag tungsten powder to make a 6 kg W97Re3-alloy ingot which was rolled to make tungsten–rhenium wire. Results presented in this paper were intended for developing a commercial process for the recycling of a large inventory of W–Re wire scrap. 相似文献
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Jane W. Lyman M.S. Glenn R. Palmer B.S. 《JOM Journal of the Minerals, Metals and Materials Society》1993,45(5):32-35
New nickel hydride alloys have been developed to replace the cadmium-containing negative electrodes of nickel-cadmium batteries. The new, cadmium free alloys promise enhanced electrochemical properties as well as reduced environmental toxicity. Rechargeable batteries using nickel hydride electrodes are strong candidates for electric vehicle applications. The U.S. Bureau of Mines is investigating hydrometallurgical technology that separates and recovers purified metallic components present in nickel hydride battery scrap. A preliminary investigation of acid dissolution and metal recovery techniques using whole batteries and electrode rolls has shown potential options that will allow the successful recycling of much of the battery fabrication scrap. 相似文献
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<正>中国钢铁工业经历了数十年的快速发展,钢铁积蓄量不断增加,今后将有大量的废钢资源产生。如何有效利用、管理这些资源或将是未来中国钢铁工业需要解决的一个重大问题。相关资料显示,短流程炼钢比长流程炼钢可减少废气86%、废水76%和废渣97%,与长流程炼钢相比,用废钢炼1吨钢可减少近1.6吨碳排放,因此废钢生产更加清洁和有利于排废减量化,鼓励能耗低、污染小的电炉炼钢发展无疑有利于环境保护。日本钢铁业的发展与中国有很多类似之处,而且日 相似文献
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白铜合金废料综合回收工艺 总被引:1,自引:1,他引:0
采用粉碎白铜合金废料→酸浸出→N902萃取分离出铜离子→P204萃取分离出锌离子→水相中剩余硫酸镍溶液工艺回收白铜合金废料中的有色金属.经实验得到较优回收工艺条件是将初步机械粉碎的白铜合金投入硫酸溶液中反应,得到浸出液;使用铜特效萃取剂N902首先分离出浸出液中的铜离子.结果表明,萃取剂N902对铜具有较好的选择性.在相比为1:1、pH值为0.57、N902的体积浓度为50%,混合时间为90 s的条件下,铜的萃取率达到99.36%.使用2 mol/L的硫酸进行反萃操作,平衡时间仪为30 s,反萃回收率达到99.68%;使用萃取剂P204萃取分离后续水相溶液中的锌离子,在相比为2:1、pH值为2.93、P204体积浓度为40%的条件下,混合时间为1 min,经5级萃取后锌离子的萃取率为99.73%,且几乎不萃取水相中的镍,选择性分离效果好.使用1 mol/L的硫酸反萃,经40 s混合后,反萃达甲衡,富锌有机相的反萃率为100%.整条工艺完成了铜、镍和锌3种主要离子间的分离,得到硫酸铜、硫酸锌和硫酸镍3种产品. 相似文献