This paper reviews the research progress of pressure ammonia leaching technology in the extrac-tion of nickel,cobalt,molybdenum and other metals,as well as the comprehensive utilization of secondary resources.The technology exhibits remarkable advantages in improving metal recovery,reducing environ-mental pollution,and enhancing resource utilization efficiency,thus playing a significant role in promoting green metallurgy and the sustainable utilization of resources.The main challenges faced in the practical ap-plication of pressure ammonia leaching technology are also discussed,and its future development trends are prospected.This paper aims to provide a theoretical reference and practical guidance for the further optimi-zation and upgrading of this technology,its industrial promotion,and the green and efficient development of complex nonferrous metal resources.

High-purity cerium oxide is widely used in high-end sectors such as electronics and optics.There-fore,the accurate determination of its lanthanum content is essential for ensuring product quality control and improving the efficiency of comprehensive resource utilization.To address the issue of insufficient pre-cision in the determination of lanthanum content in high-purity cerium oxide by inductively coupled plasma mass spectrometry(ICP-MS),this paper systematically analyzes the primary influencing factors,including the complexity of the sample composition,environmental interferences(temperature and relative humidi-ty),and the settings of instrumental parameters(RF power and carrier gas flow rate).Based on this analy-sis,corresponding optimization strategies are proposed:Sample pretreatment using ion exchange chroma-tography or extraction to reduce impurity interference and enrich lanthanum,the application of an environ-mental variable correction model to mitigate the effects of temperature and relative humidity fluctuations on the determination results,controlling the experimental environmental conditions within a temperature range of 20~25℃and relative humidity of 40%~60%,and optimizing the ICP-MS instrument operating parameters with an RF power of 1350~1400 W and a carrier gas flow rate of 0.8~1.0 L/min.Under the optimal conditions(ambient temperature of 20℃,relative humidity of 40%,RF power of 1400 W,and carrier gas flow rate of 1.0 L/min),the detection limit for lanthanum in the high-purity cerium oxide ma-trix solution reaches as low as 0.01μg/L,and the relative standard deviation(RSD)is reduced to 1.65%.This significantly enhances the accuracy and reliability of the measurement results,meeting the require-ments for the precise determination of trace lanthanum in high-purity cerium oxide.

A experimental study on comprehensive recovery of spodumene and associated tantalite-columbite from a granitic pegmatite-type spodumene ore from Xinjiang with a Li₂O grade of 1.66%,Ta₂O₅ grade of 0.0137%,and Nb₂O₅ grade of 0.0148%was carried out.A stepwise recovery process combining gravity separation,flotation,and magnetic-gravity separation was adopted.Coarse-grained spodumene was first re-covered by dense medium separation.Rougher flotation conditions for the gravity separation product were then optimized,and closed-circuit tests of dense medium separation and flotation with one roughing,two scavengings and three cleanings were conducted.Finally,associated tantalum and niobium were recovered from lithium concentrate using a combined process of high-intensity magnetic separation and shaking table gravity separation.The results show that under the dense medium separation conditions with the raw ore crushed to-6 mm and a dense medium suspension density of 2.45 g/cm³,and the rougher flotation condi-tions including a pulp density of 30%,a grinding fineness of 76.30%passing-0.074 mm,and reagent dosages of 500 g CaCl2,2000 g SG,1200 g NaOH,800 g Na₂CO₃,and 1200 g ZGP-series collec-tors(800 g ZGP-1+400 g ZGP-3),a lithium concentrate with Li₂O grade of 5.79%and recovery of 30.73%is obtained via the gravity-flotation closed-circuit process.The recoveries of associated Nb₂O₅ and Ta₂O₅ in the lithium concentrate reach 92.03%and 94.07%,respectively.Subsequently,the mixed lithium concentrate from the gravity-flotation process was treated by 20 kOe high-intensity magnetic separation combined with two-stage shaking table gravity separation,producing a tantalum-niobium concentrate with Nb₂O₅ grade of 14.75%(recovery 77.31%)and Ta₂O₅ grade of 16.03%(recovery 80.94%).The pro-posed process realizes the comprehensive recovery of lithium,tantalum and niobium resources.

To address the emulsification risk during aqueous two-phase extraction caused by high iron con-centration(Fe³⁺>5 g/L)in the acidic leachate of red mud,the jarosite method was employed for selective iron removal.Pretreatment of 100 mL acidic leachate via potassium sulfate precipitation was conducted.Under the optimized conditions(precipitation time of 60 min,precipitation temperature of 100℃,leachate pH of 2,and K2SO4 seed crystal addition of 3.5 g),an iron precipitation rate of 53.19%is achieved.The Fe³⁺concentration in the filtrate is effectively reduced to below 5 g/L,eliminating the emulsification risk.Subsequently,an aqueous two-phase system(ATPS)composed of polyethylene glycol 2000(PEG2000)and sodium sulfate was constructed to extract vanadium from the iron-removed solution.The effects of ex-traction time,iron-removed solution pH,charge regulator AC1815,and extraction temperature on vanadium extraction rate were systematically investigated.The extraction mechanism was explored through FTIR spectroscopy and Zeta potential.The results indicate that apart from Fe³⁺,coexisting ions exhibit negligible interference with vanadium extraction.Under the optimal conditions of an extraction time of 20 min,an iron-removed solution pH of 2,an extraction temperature of 20℃,and the addition of one drop of AC1815,the vanadium extraction rate reaches 85.24%.The protonated charge regulator combines with polyvanada-te anions through electrostatic attraction,thereby driving their transfer into the PEG2000 phase.This process successfully achieves vanadium-iron separation in the acidic leachate of red mud and efficient vana-dium extraction in the ATPS,providing theoretical support and a technical pathway for the industrial re-source utilization of red mud.

近日,广西壮族自治区工业和信息化厅与中国有色金属工业协会联合发布《有色金属行业先进适用工艺、技术、装备(产品)推荐目录》。长沙有色冶金设计研究院有限公司(简称长沙有色院)自主研发的“复杂构造区深井矿山高应力围岩承压调控支护技术”“矿山高陡边坡全链路防控技术装备及规模化应用”以及“铅锌冶炼废水无钠硫化深度除铊脱砷与资源化利用技术”成功入选,标志着该公司在金属矿山安全开采与绿色冶炼关键领域的技术实力与创新成果获得行业高度认可。

近日,长沙市科技局发布《关于2025年长沙市技术创新中心备案的通知》,长沙有色冶金设计研究院有限公司(简称长沙有色院)正式获批组建“长沙市能源金属清洁提取与循环利用技术创新中心”。该中心的成立,标志着长沙有色院在战略性新兴产业关键材料领域的科研布局与技术创新体系建设迈出重要一步,将为其未来业务升级与行业资源整合奠定坚实的技术平台基础。该中心将聚焦能源金属矿产资源(如锂、钴、镍、稀土等)的绿色低碳提取、复杂物料高效分离、二次资源循环再生等核心技术领域,开展应用基础研究、关键技术攻关与工程化验证。中心将依托长沙有色院在有色金属冶金、矿物加工、环境工程等领域的技术积累与工程经验,整合内外部创新资源,致力于构建“基础研究-技术开发-产业示范”一体化的创新链条。

《稀有金属与硬质合金》创刊于1973年,是中文核心期刊,致力于稀有金属冶金与材料领域的科研创新与产业应用。本刊坚持“传播先进科技成果,引领创新,贴近科研与生产”的办刊宗旨,为科研人员及工程技术人员提供高水平的学术交流平台。为提升学术成果传播效率,缩短出版周期,本刊已于2025年7月1日起正式开通中国知网(CNKI)网络首发服务,录用定稿将优先在线发布,与印刷版具有同等学术效力。

《稀有金属与硬质合金》由长沙有色冶金设计研究院有限公司和中国有色金属学会联合主办,长沙有色冶金设计研究院有限公司负责编辑出版,为2023版北大中文核心期刊、中国科学引文数据库来源期刊,入编《中国学术期刊(光盘版)》和《中国科技期刊数据库》等数字化网络。

为适应我国信息化建设需要,扩大读作者学术交流渠道,《稀有金属与硬质合金》已许可中国知网、万方数据、维普资讯、超星信息、长江文库、有科有数、钛学术及新华网学术等数据库以数字化方式复制、汇编、发行、信息网络传播整刊全文。本刊支付的稿酬已含上述数据库的著作权使用费,所有作者向本刊提交文章发表之行为视为同意上述声明。如有异议,请在投稿时说明,本刊将按作者说明处理。