首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   146篇
  免费   7篇
  国内免费   8篇
电工技术   1篇
综合类   5篇
化学工业   18篇
金属工艺   12篇
机械仪表   1篇
矿业工程   72篇
能源动力   4篇
一般工业技术   5篇
冶金工业   38篇
原子能技术   2篇
自动化技术   3篇
  2024年   1篇
  2022年   3篇
  2021年   1篇
  2020年   3篇
  2019年   5篇
  2018年   2篇
  2017年   3篇
  2016年   3篇
  2015年   2篇
  2014年   4篇
  2013年   16篇
  2012年   6篇
  2011年   14篇
  2010年   9篇
  2009年   7篇
  2008年   4篇
  2007年   5篇
  2006年   7篇
  2005年   9篇
  2004年   10篇
  2003年   3篇
  2002年   7篇
  2001年   3篇
  2000年   2篇
  1999年   6篇
  1998年   7篇
  1997年   1篇
  1996年   1篇
  1995年   1篇
  1993年   4篇
  1992年   3篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1988年   3篇
  1987年   1篇
排序方式: 共有161条查询结果,搜索用时 15 毫秒
1.
采用锌粉置换除钴得到的高钴渣,针对现有工艺的不足,提出了一段硫酸浸出-二段高钴渣中和-过氧化氢氧化除铁-锌粉置换除镉-新型活性硫化剂(简称除镍试剂)除镍-过硫酸钠选择性氧化除锰-过硫酸钠氧化沉钴的湿法冶金工艺,实现渣中钴和镍的分离回收。对工艺流程探究,得出了较优的实验结果。硫酸浓度为150 g/L,温度80℃条件下浸出120min,钴的浸出率为96.14%。锌、镍、镉、铁、锰的浸出率均大于99%。过氧化氢沉铁率达到99.8%以上,过硫酸钠除锰可使锰除到0.13mg/L,沉淀率达到99.98%,Co沉淀率达到99.99%,氧化渣中钴含量达到49.75%。  相似文献   
2.
作为一种关键原材料,锂是生产新能源汽车锂离子电池必需的战略金属。随着新能源汽车产业的快速发展,对锂的需求量持续骤增。然而,我国锂矿石等一次资源储量低,对外依存度目前已高达70%,难以满足快速增长的市场需求,供需矛盾日渐突出。因此,高效清洁提取废锂离子电池中的锂必将成为锂资源的重要补充,对有效避免废锂离子电池对生态环境和人体健康的二次污染风险、保障战略金属锂的安全供给和新能源汽车行业的可持续发展意义重大。鉴于湿法冶金具有回收率高、回收产物纯度高、能耗低等优点,本研究综述了近年来以湿法冶金为主提取废锂离子电池中锂的研究进展,重点分析了废锂离子电池预处理、浸出、锂分离与提取的主要方法及其优缺点,并提出了进一步强化选择性提取锂相关技术研发及废锂离子电池全组分清洁利用的建议,同时对废锂离子电池回收工艺的发展趋势及前景进行了展望。  相似文献   
3.
《Advanced Powder Technology》2020,31(10):4187-4196
Manganese oxide catalysts have been synthesized from the used batteries via hydrometallurgical method and effect of hydrometallurgical parameters such as the effect of acid type (H2SO4, HNO3, HCl), acid concentration (0.5, 1, 1.5, 2 %v/v) and powder to acid ratio (1/50, 1/60, 1/70, 1/80) were in detail investigated. The physico-chemical properties of as-prepared catalysts were characterized by FT-IR, XRD, FESEM, EDX, BET, TEM, and TPR-H2 analysis. The activity of as-prepared catalysts were investigated towards the oxidation of benzene, toluene, and xylene (BTX) in a plasma-catalytic process. The results show that benzene and toluene conversion were almost constant in the range of 97–98% in case of various acid types, acid concentrations and solid to liquid ratios. However, the xylene conversion were varied in case of different hydrometallurgical factors. The highest xylene conversion was obtained in the presence of MnS0.5–60, which was prepared using H2SO4 with concentration of 0.5%v/v and solid to liquid ratio of 1/60. The effect of the input voltage and BTX flow rate on the BTX conversion was also investigated using MnS0.5–60 catalyst in detail.  相似文献   
4.
The processing of manganese nodules for the production of raw materials has been a subject of research for many decades. The nodules contain many valuable metals like copper, cobalt and nickel. In recent years, the German Federal Institute for Geoscience and Natural Resources developed a process for the processing of manganese nodules based on a combined pyro- and a hydrometallurgical route. Clausthal University of Technology was assigned to develop the hydrometallurgical process for the treatment of a FeNiCuCo alloy. The developed process consists of pressurized sulfuric acid leaching with the suppression of hydrogen gas formation, precipitation and solvent extraction.  相似文献   
5.
Platinum group metals (PGMs) are used widely in various applications, including as environmental catalysts. Since PGMs are rare and expensive, they are recycled after being recovered. Currently, PGMs are recovered, after a pyrometallurgical step that upgrades the concentration, by dissolving in strong acids containing toxic oxidizing agents like aqua regia. To avoid the use of such toxic agents, we have proposed a new route to dissolve PGMs in hydrochloric acid (HCl) using complex oxides. In the present study, we used this new process to dissolve Pt in supported metal catalysts. Complex oxides of Pt were prepared by calcining mixtures of Pt/Al2O3 and alkali metal salts at 600–800 °C in air. These were then dissolved in 12 M HCl. The results showed that the Pt in the calcined samples dissolved readily in HCl and that the Pt solubility was nearly 100% under the appropriate preparation and dissolution conditions. We also confirmed that the new process is suitable for leaching PGMs from spent automotive catalysts.  相似文献   
6.
镍矿的处理工艺现状及进展   总被引:4,自引:2,他引:2       下载免费PDF全文
镍矿是国民经济中一种重要的金属矿产资源,随着经济的发展,人们对镍矿资源的消耗呈逐年上升趋势。目前所查明的镍矿资源中,有近70%的镍矿资源都是硫化镍矿,近30%的镍矿资源属于红土镍矿。随着镍矿资源查明储量的下降,其镍矿资源的综合利用受到越来越多国家的重视。在查阅大量文献的基础上,简要的论述了镍矿资源的总体情况,概述了硫化镍矿常规的处理方法,以及近年来浮选法的一些实际应用及发展。最后,介绍了当前状况下红土镍矿的火法和湿法处理工艺现状及进展,以及一些其他处理镍矿石的方法。为以后镍矿石资源的综合利用和处理工艺的研究提供了一定的参考价值。  相似文献   
7.
本文针对赤铁矿沉铁技术,以纯硫酸亚铁和硫酸锌溶液为研究对象,研究了锌铁离子浓度对赤铁矿法除铁过程中沉铁效果的影响和赤铁矿渣硫铁含量的影响。结果表明:增加亚铁离子浓度,渣中硫的百分含量会升高,铁的百分含量会减少;在相同亚铁离子浓度条件下,增加锌离子浓度,沉铁效果会变差,渣中硫百分含量会降低,渣中铁百分含量会升高。  相似文献   
8.
Abstract

Oxygen gas is used as a reactant in many hydrometallurgical processes. However, oxygen is sparingly soluble in aqueous electrolyte solutions, and the driving force for its mass-transfer from the gas to the aqueous phase is also very low. Hence, the mass-transfer of oxygen depends significantly on the interfacial area between the gas and the liquid phase, which in turn depends on the mixing conditions inside the reactor. A change in the solution composition or the presence of solids can further alter the rate of oxygen mass-transfer. All such phenomena related to the gas-liquid oxygen mass-transfer in hydro-metallurgical unit operations are critically reviewed in the present article - from the basic thermodynamics and kinetics of oxygen dissolution in aqueous solutions to the most recent advances in oxygen mass-transfer systems.  相似文献   
9.
Oxygen gas is used as a reactant in many hydrometallurgical processes. However, oxygen is sparingly soluble in aqueous electrolyte solutions, and the driving force for its masstransfer from the gas to the aqueous phase is also very low. Hence, the mass-transfer of oxygen depends significantly on the interfacial area between the gas and the liquid phase, which in turn depends on the mixing conditions inside the reactor. A change in the solution composition or the presence of solids can further alter the rate of oxygen masstransfer. All such phenomena related to the gas-liquid oxygen mass-transfer in hydrometallurgical unit operations are critically reviewed in the present article – from the basic thermodynamics and kinetics of oxygen dissolution in aqueous solutions to the most recent advances in oxygen mass-transfer systems.  相似文献   
10.
本文针对钼镍矿难处理的技术现状,提出了一种加压酸浸、常压碱浸、萃取相结合的全湿法处理镍钼矿的新工艺。试验结果表明,在加压酸浸时,钼的转化率可以达到98.3%以上,镍的浸出率达到98.7%。经过碱浸、萃取后钼镍综合回收率达92%以上。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号