共查询到17条相似文献,搜索用时 437 毫秒
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我国羰基法精炼镍技术的发展方向 总被引:2,自引:1,他引:1
叙述了国外羰基法精炼镍的典型工艺流程,评述了常压法、中压法及高压法的优缺点。结合目前国内羰基法精炼镍的生产状况,总结多年的研究成果指出,我国镍资源的特点及所提供的合金最适合采用中压羰基法精炼镍工艺。 相似文献
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《稀有金属》2004,28(4):710-710
国家“十五”科技攻关计划“镍精炼生产工艺产业化技术”课题 ,日前通过国家科技部、中国有色金属工业协会组织的专家验收。专家验收委员会认为“羰基法镍精炼工艺” ,突破了国外的技术垄断和封锁。目前金川公司已利用掌握的羰基法镍精炼工艺 ,首次建成 5 0 0t/a规模中试线 ,并一次投产成功 ,产出了合格的产品 ,具备了实现大规模工业化生产的基础 ;镍钴精炼新工艺改造方案 ,使镍回收率由 96 %提高到97 5 % ,铂、钯、金的回收率提高 1 5个百分点以上。国内对羰基法提炼工艺研究虽有几十年的历史 ,但由于其工艺设备要求苛刻以及易燃、易爆、剧… 相似文献
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铜镍分离与精炼方法是镍冶金工艺中的关键问题。本文通过对传统的分层熔炼、磨浮分离及五种湿法选择浸出方法、羰基法进行简要分析对比,指出各种镍(铜)锍分离方法的优缺点。 相似文献
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对我国电镍生产主要工艺存在的问题进行分析,并提出工艺改进方案。在现有不溶阳极电积精炼工艺基础上,采用常压浸出渣添加焙砂加压选择性浸出固定硫、浸铜后渣电炉还原熔炼、产出的铜镍锍用返液及镍和铜电积的阳极液分段浸出等措施解决现有工艺的内在矛盾和缺陷,提高对原料成分波动的适应性,分阶段集中和提高各有价金属的回收率。 相似文献
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详细介绍了大型72 000 kVA矿热电炉冶炼镍铁的生产工艺——回转窑-电炉熔炼(RKEF)工艺。该工艺是处理红土镍矿生产镍铁的主流工艺,可有选择地进行脱硫、脱硅、脱碳和脱磷,采用镍铁精炼新工艺对粗镍铁金属液进行喷吹和升温,得到满足不锈钢生产所需的合格镍铁原料,具有一定的推广应用前景。 相似文献
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针对粗镍铁精炼技术新工艺,总结了目前国内外主要镍铁冶炼厂的粗镍铁精炼工艺流程并进行了比较.分析了镍铁中有害元素的来源,同时对3种典型的镍铁精炼工艺的应用及其同整个冶炼工艺流程的合理衔接进行了重点介绍,得出不同镍铁产品的精炼工艺不同,得到的产品品位也不同。 相似文献
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R. R. Moskalyk A. M. Alfantazi 《Mineral Processing and Extractive Metallurgy Review》2013,34(3-4):141-180
Nickel in the form of cathodes, rounds, powders, and salts is well recognized as a useful commodity in domestic industries and/or export. It is shipped as concentrates, mixed sulphides, and ferronickel. Today, there are only a limited number of major and minor producers of this important metal, which is employed worldwide in a multitude of commercial and residential applications. Traditionally, nickel and associated metal values are recovered from ore feedstock by proven mineral processing, smelting, and refining processes. Typical host minerals contain other base metals, such as copper, cobalt, and noble metals consisting of gold, silver, and OPMs (otherprecious metals). Although sulphide-bearing ores such as those found in Canada and Russia will likely serve as a long-term source of this nonferrous material, the future trend is expected to involve laterite processing, which represents about 70% of the world's known nickel resources. The authors are aware of seven nickel refineries (ie, electrorefining) on a global basis dedicated to the production of class I primary nickel products. The supply and demand of pure and high-grade nickel products during the past decade has been erratic and subject to wide fluctuations in delivered price. This article describes theestablished industrial processes for recovery of nickel originating from sulphidic sources. Details of smelting and refining practice are provided for the three largest nickel producers. For completeness, other extractionprocesses involving a mixed sulphide, pellets from the carbonyl process, nickel powders, and briquettes are noted in the compendium of nickel processing practice, which includes pyrometallurgical principles. This paper lists the 47 pyrometallurgical operations worldwide which are mainly dedicated to the production of class II nickel products (nickel oxide products and utility nickel), nickel matte, and granules. The theme of the nickel biography is to provide a full extractive metallurgy synopsis rather than the reader reviewing numerous authors. 相似文献
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进行了从废雷尼镍催化剂中回收镍的研究,重点研究了废雷尼镍催化剂的预处理条件以及羰基合成的温度、CO压力等对羰化合成率的影响。 相似文献