In this paper,gallium nitrate was taken as the raw material,gallium oxyhydroxide was successfully prepared by gallium salt precipitation method,and the effects of process parameters such as precipitant type,reaction temperature,pH value and gallium ion concentration on the preparation of gallium oxyhydroxide were systematically investigated.The results show that the precipitation rate of gallium reaches 79.7%,and the precipitated product is white powder of gallium oxyhydroxide under the optimal conditions of ammonia as precipitant,reaction temperature of 70℃,pH value of 8,and gallium ion concentration of 0.16 mol/L.Theβ-Ga₂O₃powder with uniform morphology and conforming to the Ga₂O₃3N standard in YS/T 741—2010 can be prepared by roasting the precipitated product at 800℃for 3 h.In this study,gallium nitrate can be efficiently converted into gallium oxyhydroxide with homogeneous morphology and size by gallium salt precipitation method,with simple process flow,low production cost,and prospect for industrialization.

In response to the problem of low germanium volatilization rate during the matte smelting of Gecontaining copper concentrates,taking high-sulfur low-grade Ge-containing copper concentrate from Yunnan as the research object,the effects of reaction atmosphere,slag composition,and smelting temperature on copper matte grade,Ge volatilization rate,and Ge distribution rules in dust,copper matte,and slag were systematically investigated.The results show that under the optimized conditions of carbon addition of 15%,oxygen concentration of 21%in top-blown gas,Fe/SiO₂mass ratio of 1.1,smelting temperature of 1350℃,and CaO addition of 10%,the copper matte grade obtained by top-blown smelting is 17.21%,and the Ge volatilization rate can reach 94.88%.A strongly reducing atmosphere is conducive to Ge volatilization,but not conducive to desulfurization.Lead and zinc enter the copper matte primarily in the form of sulfides,resulting in a lower copper matte grade.Appropriate Fe/SiO₂mass ratio and CaO addition promote the formation of pyroxene-based slag,reduce slag viscosity,and improve melt fluidity and copper matte settling efficiency,which is beneficial for increasing Ge volatilization rate and copper matte grade.

Antimony is an important strategic metal.China is the country with the richest antimony reserves and the largest antimony product production in the world.However,the long-term over-exploitation has led to a significant decline in China's current antimony resource advantage.Focusing on the current situation of antimony ore resources and industrial development in China,the technical features of the current dominant antimony smelting processes are systematically summarized,and the research progress of oxygen-enriched molten pool smelting process is highlighted.

The industrial test of“oxidation smelting-hot oxidized slag reduction-hot reduced slag fuming”using the oxygen-enriched side-blown triple furnace was carried out to process jamesonite,and the rules of element migration during the smelting process were studied.The test results show that the lead-antimony alloy with Pb and Sb mass fractions of 70.11%and 20.52%,respectively,can be produced in the reduction furnace and the direct yields of Pb and Sb are 95.1%and 88.2%,respectively.The fuming slag becomes harmless glass slag after water quenching treatment,the comprehensive recovery rates of Pb,Sb,Zn and Ag are 99.8%,97.6%,88.0%and 99.5%,respectively,and the S utilization rate is approximately 99.0%.The coal consumption for processing 1 t jamesonite is 259.3 kg powdered smokeless coal.This process has broad application prospects,due to the advantages of good environmental protection effect,high recovery rate of valuable elements,low energy consumption and high degree of automation.

由长沙有色冶金设计研究院有限公司自主研发的“沉积型软破围岩铝土矿床顶板安全管控综合技术”,解决了沉积型软破围岩铝土矿床地下开采顶板管控难度大、顶板垮冒事故易发多发、矿石损失率高等世界性难题。该技术实现了铝土矿采场安全回采,矿石大块率控制在5%以下,爆破成本降低0.27元/t,采场生产能力提高10%~15%,采矿回收率提高20%以上,技术经济指标先进,整体技术达国际领先水平。

2025年5月,由长沙有色冶金设计研究院有限公司设计的盘王像及留心亭观光电梯项目已于广西大瑶山国家级自然保护区正式竣工投运。该电梯系统可在40 s内将游客平稳输送至瑶山之巅,使游客既可俯瞰溪涧飞瀑的灵动景致,亦能漫步云端饱览美轮美奂的瑰丽云海画卷。

《稀有金属与硬质合金》由中国有色金属学会和长沙有色冶金设计研究院有限公司联合主办,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。

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