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Mining Technology and Mine Management

Research Progress of Microalloyed Gold-based Materials

  • Xiaopeng CHI , 1, 2, 3 ,
  • Jiayan XU 1 ,
  • Shuiping ZHONG 1, 2, 3 ,
  • Xiuhua CHEN 4
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  • 1. Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, Fujian, China
  • 2. Fuzhou University—Mineral Resources Comprehensive Utilization Joint Research and Development Center, Zijin Mining Group, Fuzhou 350108, Fujian, China
  • 3. State Key Laboratory for Comprehensive Utilization of Low-grade Refractory Gold Resources (Zijin Mining Group Co. , Ltd. , ), Shanghang 364200, Fujian, China
  • 4. Decheng Jewelry Group Co. , Ltd. , Fuzhou 350200, Fujian, China

Received date: 2021-10-08

  Revised date: 2021-12-01

  Online published: 2022-04-25

Highlights

As a precious metal material widely used in electronic packaging,jewelry and other industries,the performance improvement of gold-based materials has always been the focus of research,and micro-alloying technology,as a new metallurgical technology that can optimize metal performance,is widely used in the application and development of precious metal materials. From the perspective of microstructure and atomic morphology,we discuss the mechanism principle of microalloying technology of gold-based materials.From the point of microstructure,the reinforcement principle of micro-alloying is expounded from the perspective of micro-organization such as solid-solute reinforcement,second-phase reinforcement and fine crystal rein-forcement.The development process and present situation of gold microalloying technology from theoretical research to application experiment are introduced in detail.The performance differences of gold-based materials under the action of different trace elements were compared comprehensively.At present,rare earth elements have both good solid-soluble reinforcement effect,second reinforcement effect and fine crystal reinforcement effect,which are the main trace elements to optimizing the performance of gold-based materials.Finally,looking forward to the application prospect and research direction of micro-alloyed gold-based materials,we should establish a scientific model that can scientifically predict the micro-form and performance of gold-based materials on the basis of more in-depth and systematic research,and obtain the best complement element type and ratio,so as to improve the research and development efficiency of new gold-based materials.

Cite this article

Xiaopeng CHI , Jiayan XU , Shuiping ZHONG , Xiuhua CHEN . Research Progress of Microalloyed Gold-based Materials[J]. Gold Science and Technology, 2022 , 30(1) : 141 -150 . DOI: 10.11872/j.issn.1005-2518.2022.01.143

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惠誉:亚洲铁矿石产量2025年见顶

据Mining Weekly报道,惠誉集团旗下的惠誉方案国家风险和产业研究团队预测,2025年亚太地区铁矿石产量将从目前的21.6亿吨增至22.7亿吨,随后转为结构性下降,2031年降至21.7亿吨。

惠誉预计,经济增速持续放缓将导致铁矿石和钢材价格下跌,原因是杠杆过高和金融风险使得不动产投资下降。不过,从短期看,政府会采取加大基础设施来作为刺激手段。同时,中长期价格下跌也会减少供应方面的投资。中国和澳大利亚仍然会左右该地区供需市场。

在对钢铁生产商绿氢强有力政策支持下,澳大利亚高质量的铁矿石资源仍将是该国矿业公司和项目的价格竞争优势。惠誉解释说,澳大利亚在该地区项目链中居主导地位,而在2025年之前,其他地区产量短期增长主要来自现有生产矿山。惠誉方案并不认为对俄罗斯的制裁引发的供应短缺和商品价格上涨对铁矿石短期形势造成明显影响。不过,该机构认为,能源价格上涨以及最大经济体衰退的可能将加速钢铁需求下降,带来铁矿石生产下行风险。

http://www.goldsci.ac.cn/article/2022/1005-2518/1005-2518-2022-30-1-141.shtml

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