铜冶炼厂渣中的独居石、富镧玻璃和其他微量元素：对富硅铁熔体中临界金属行为的限制

IF 1.1 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Mineralogy and Petrology Pub Date : 2025-05-06 DOI:10.1007/s00710-025-00897-2

Hassan Gezzaz, Cristiana L. Ciobanu, Nigel J. Cook, Kathy Ehrig, Ashley Slattery, Benjamin Wade, Sarah Gilbert, Yuri T. Campo Rodriguez

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引用次数: 0

摘要

炉渣是关键金属的潜在新来源。我们进行了一项微米到纳米尺度的研究，以解决来自奥林匹克大坝采矿-冶炼-炼油厂的风冷闪速炉（FF，氧化）和电炉（EF，还原）炉渣的形态、分布和相关联。结果使人们能够理解关键金属在熔体和冷却结晶相之间的行为和分配，在一个模拟自然界富铁硅系统的受控冶炼环境中。熔体在1300℃时产生的炉渣组成相的相对比例不同。FF和EF渣都含有主要的磁铁矿和两种成分不同的富硅铁玻璃（玻璃-1和玻璃-2）；铁矾是电渣的主要成分。玻璃-1富含稀土+ Y （4.5-5.4 wt）%, Ce2O3 + La2O3) and contains dendritic monazite-(Ce). Glass-2 (~ 70 wt% SiO2) contains < 1 wt% Ce2O3 + La2O3. The EF slag reaction sequence is: magnetite \(\rightarrow\) fayalite + glass-1 \(\rightarrow\) monazite \(\rightarrow\) glass-2. Immiscibility of REE-rich liquid from Si-Fe-rich melt is inferred from amorphous ‘monazite-like’ droplets. Chondrite-normalised fractionation patterns are defined by downwards-sloping LREE segments in both glasses. Partition coefficients are calculated for magnetite and fayalite relative to glasses. DREY for HREE exceeds those for LREE in all phases and fayalite has an order of magnetite higher DHREE than co-existing EF magnetite. Applying lattice strain models to experimental values show excellent fits for DHREE-model trends, even if lattice strain is not the sole factor controlling partitioning. Melt polymerisation, variable/unpredictable oxidation states, and constraints from specific crystallographic sites, also impact on observed trends. This study provides clues to element behaviour in metallurgical plants that can assist potential utilization of copper smelter slags to meet the demand for REE and other contained critical metals.

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Monazite, lanthanide-rich glasses, and other trace elements in copper smelter slags: constraints on critical metal behaviour in Si-Fe-rich melts

Furnace slags are potential new sources of critical metals. We undertook a micron- to nanoscale study that addresses speciation, distribution and associations of phases in air-cooled flash furnace (FF, oxidised) and electric furnace (EF, reduced) slags from the Olympic Dam mining-smelting-refinery operation. Results enable understanding of the behaviour and partitioning of critical metals between melt and cooling crystalline phases in a controlled smelter environment that mimics Fe-Si-rich systems in Nature. Melts at ~ 1300 °C result in slags that differ in the relative proportions of component phases. Both FF and EF slags comprise major magnetite and two, compositionally distinct Si-Fe-rich glasses (glass-1 and -2); fayalite is a main component of EF slag. Glass-1 is rich in REE + Y (4.5–5.4 wt%, Ce₂O₃ + La₂O₃) and contains dendritic monazite-(Ce). Glass-2 (~ 70 wt% SiO₂) contains < 1 wt% Ce₂O₃ + La₂O₃. The EF slag reaction sequence is: magnetite \(\rightarrow\) fayalite + glass-1 \(\rightarrow\) monazite \(\rightarrow\) glass-2. Immiscibility of REE-rich liquid from Si-Fe-rich melt is inferred from amorphous ‘monazite-like’ droplets. Chondrite-normalised fractionation patterns are defined by downwards-sloping LREE segments in both glasses. Partition coefficients are calculated for magnetite and fayalite relative to glasses. D_REY for HREE exceeds those for LREE in all phases and fayalite has an order of magnetite higher D_HREE than co-existing EF magnetite. Applying lattice strain models to experimental values show excellent fits for D_HREE-model trends, even if lattice strain is not the sole factor controlling partitioning. Melt polymerisation, variable/unpredictable oxidation states, and constraints from specific crystallographic sites, also impact on observed trends. This study provides clues to element behaviour in metallurgical plants that can assist potential utilization of copper smelter slags to meet the demand for REE and other contained critical metals.

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来源期刊

Mineralogy and Petrology 地学-地球化学与地球物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Mineralogy and Petrology welcomes manuscripts from the classical fields of mineralogy, igneous and metamorphic petrology, geochemistry, crystallography, as well as their applications in academic experimentation and research, materials science and engineering, for technology, industry, environment, or society. The journal strongly promotes cross-fertilization among Earth-scientific and applied materials-oriented disciplines. Purely descriptive manuscripts on regional topics will not be considered. Mineralogy and Petrology was founded in 1872 by Gustav Tschermak as "Mineralogische und Petrographische Mittheilungen". It is one of Europe''s oldest geoscience journals. Former editors include outstanding names such as Gustav Tschermak, Friedrich Becke, Felix Machatschki, Josef Zemann, and Eugen F. Stumpfl.