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熔体过滤法钢液脱铜的研究 总被引:8,自引:0,他引:8
讨论了熔体过滤法钢液脱铜的基本原理。用氧化物组成的脱铜剂进行了钢液脱铜的可行性试验。结果表明:通过还原反应向含铜钢液中加入活性合金元素,提高了氧化物对钢液中铜元素的选择性吸附作用,每克脱铜剂可脱铜约0.23g。 相似文献
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电积法脱铜脱砷的现状与进展 总被引:7,自引:1,他引:6
对铜电解液净化常规电积及各种改进电积工艺的流程优缺点进行了评述。作者所提出的控制阴极电势电积法已经完成了工业化试验并即将投入工业生产。与以往各种脱铜脱砷电积法比较,该方法可提高工作效率10%~40%,节能10%~50%,可产出合格电铜,基本上消除了酸雾并能抑制砷化氢的析出,因而具有高效、节能、创收、环保等一系列优点。控制阴极电势电积法经济效益与社会效益明显,应用前景广阔,值得推广。 相似文献
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难选金矿石的细菌浸出 总被引:1,自引:0,他引:1
对金呈细粒浸染状嵌布的含砷、含铜难选金矿石进行了细菌脱砷、脱硫、脱铜的试验研究。生物浸渣由氰化或硫脲浸出,金的浸出率达87%以上。研究了影响细菌生长、浸出的各种有关因素及由此引起的金属溶解现象,为细菌浸出在工业上应用提供了技术参考。 相似文献
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本文主要介绍了30万t铜电解项目净化系统的工艺方案选择及设计,包括脱铜、除杂工艺的选择,脱铜厂房的设计,净液总量的计算,一、二段终液含铜成分的确定,厂址及电积槽型选择,脱铜槽数的确定与布置等。该系统采用电积法生产标准阴极铜(真空蒸发生产硫酸铜为辅)-诱导法脱砷锑鉍的生产工艺流程。 相似文献
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某高铜载金炭中金品位2. 58 kg/t,铜品位50. 85 kg/t。针对该载金炭中铜品位高,影响吸附作业的问题,采用铁盐法进行脱铜试验研究,并考察脱铜液再生利用的影响因素。结果表明:采用铁盐法脱铜工艺处理高铜载金炭,在液炭比9∶1,脱铜时间6 h,脱铜温度25℃,氯化铁用量6 kg/t,硫酸用量15 kg/t的条件下,脱铜率可达97. 52%,且金基本不被浸出;脱铜液采用萃取-反萃工艺处理,可实现铜的综合回收,萃余液通过空气氧化后返回脱铜作业循环利用,脱铜率可达到97. 46%。 相似文献
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《有色金属(冶炼部分)》1977,(9)
我厂粗铅火法精炼,过去是采用粗铅锅熔化并熔析脱铜。其操作是用捞渣机将熔铅锅上面的浮渣捞净,降温熔析脱铜,然后撇净熔析渣,再加硫搅拌脱铜。撇出的熔析渣返回粗铅锅。脱铜后的铅液升温铸阳极板。含铜的浮渣进反射炉熔炼,在熔化过程中铜富集到冰铜中与铅分开,分离的铅由炉中放 相似文献
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采用铜阳极泥常压预浸脱铜和加压预浸脱铜工艺,对阳极泥脱铜流程进行研究。介绍了预浸脱铜工艺流程,分析了阳极泥中铜含量变化对生产工艺造成的影响,梳理了处理方式,阐述了脱铜处理过程中的调整关键,提出了改进意见以达到脱铜能力的提升和尾液的再利用。 相似文献
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介绍了在现有电解沉积法脱铜的基础上,进一步探索优化电积法脱铜工艺,借鉴电解铜精炼生产工艺中添加剂、温度、电流的控制,降低黑铜泥含铜,优化作业环境,降低工人劳动强度。 相似文献
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Decopperization in molten steel with FeS Na2S slag was investigated in the laboratory. It was found that with an increase in FeS content of the FeS Na2S slag, the decopperization ratio increased. The decopperization ratio could reach the maximum of 716% in hot metal. The decopperization ratio was closely related to the carbon content, and the higher the carbon content, the higher was the decopperization ratio. Sulphur addition was found in the process of decopperization, and the increase in sulphur content of molten steel was about 02%-042%. However, by adding 30%-50% of BaO to the FeS Na2S slag, the addition of sulfur content in molten steel could be reduced by about 50%. The finer slag system composition was FeS∶Na2S∶BaO=40∶20∶40. 相似文献
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A novel method is proposed to enhance the gasification and removal of copper from molten steel by adding ammonium salts or urea into molten steel under normal pressure. The decopperization experiments were conducted in a molybdenum-wire resistance furnace at 1 873 K. The copper content of about 400 g of a mild steel was reduced from 0.49 %(mass fraction, the same below) and 0.51 % to 0.31 % and 0.38 % using 0.7 g of NH4Cl and 0.5 g of (NH4)2C2O4 respectively, while the copper content of the molten steel was reduced from 0.61 % to 0.56 % using 2.00 g of NH2CONH2. 相似文献
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Li Liansheng Li Shiqi Xiang Changxiang Cao Jie Liu Keming Li Suqin University of Science Technology Beijing Beijing 《钢铁研究学报(英文版)》1999,6(2):0
EAFsteelhasbeenincreasedrapidlyandsharesaconsiderablepercentageoftheworldsteelproduc-tion,thankstotheremarkabletechnologicaldevel-opmentssuchasultrahighpower(UHP)furnace,continuousorsemi-continuousscrapchargingandtwinshellprocess[1,2].Repeateduseand… 相似文献
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Pulsating bottom-blowing was proposed to strengthen the electric arc furnace (EAF) molten bath stirring. The fluid flow characteristics and stirring effects of different pulsating bottom-blowing modes on EAF molten bath were studied through water model experiments and numerical simulations. The mixing time was measured by water model experiments and the flow field characteristics of EAF molten bath were simulated by numerical simulations. Compared with conventional bottom-blowing, pulsating bottom-blowing can accelerate the fluid flow velocity and improve the stirring of molten bath. With pulsating bottom-blowing, the molten bath fluid flow field is more disorder, the fluid flow velocity increases and the dead zone volume decreases. Compared with EAF steelmaking with conventional bottom-blowing conditions, pulsating bottom-blowing technology can improve the metallurgical effects and the molten steel quality in EAF steelmaking with lower FeO content of final slag, lower phosphorus content and carbon-oxygen equilibrium of final molten steel, and lower temperature deviation. 相似文献
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采用有限元方法模拟了中频电磁场对软接触结晶器内钢液流动的影响规律,讨论感应线圈电流强度和电源频率等因素对结晶器内钢液流动的影响。结果表明:电磁力能加强结晶器内上半部熔池的搅拌强度,并在弯月面区域形成一明显的回流区,同时还能减小钢液射流的渗入深度;增大电流强度,能加强钢液的回流和对钢液的搅拌,减小射流渗入深度,同时也加剧了钢液自由表面的波动,因而电流强度有一个最佳的控制范围;增加电源频率时,射流的渗入深度变化不大,但弯月面附近钢液的紊动能和速度都有所提高,综合考量,本研究中将频率控制在2500 Hz左右。 相似文献
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