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Investigations on mineralogical characteristics of rare earth minerals in Bayan Obo tailings during the roasting process

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Journal of Rare Earths 2017年第3期35卷 300-308页

作者：郑强吴文远边雪 School of Metallurgy Northeastern University Shenyang 110819 China

This paper focused on the investigation of the mineralogical characteristics of rare earth minerals from Bayan Obo tailings during the roasting process in the presence of coal,Ca（OH）_2 and *** experiments and leaching experiments were carried out to study the decomposition of rare earth *** results indicated that bastnaesite and monazite could be completely decomposed at 650 ℃ and the leaching ratio of rare earths could reach 89.78%.The reaction mechanisms of bastnaesite and monazite at 650 ℃were *** bastnaesite,both the outer layer decomposition and inner core decomposition occurred simultaneously during the ***,monazite was decomposed in a spatial sequence starting from the outer layer and proceeding to the inner core.

关键词： mineralogical characteristics rare earths Bayan Obo tailings roasting reaction mechanism

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A quantitative investigation on consolidation of titanium-containing pellets during roasting process

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Journal of Iron and Steel Research(International) 2023年第1期30卷 40-50页

作者： Yao-zu Wang Jian-liang Zhang Zhi-hui Chen Zheng-jian Liu Chen-yang Xu Yu-meng Li Li-ming Ma Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China College of Artificial Intelligence North China University of Science and TechnologyTangshan 063210HebeiChina

The measurement method and quantitative indexes of iron ore consolidation characteristic temperature(CCT)during roasting,including consolidation starting temperature,highest consolidation rate temperature,and consolidation termination temperature,were improved based on previous *** mineral properties of V-Ti magnetite(Panzhihua)were analyzed,and the CCT of V-Ti magnetite was *** investigate the effect of mineral types on CCT,a series of trials were carried out by using various ores,including high-grade magnetite ore,high silicon iron ore,and V-Ti magnetite *** greatest shrinkage of V-Ti magnetite was 6.7%,the consolidation starting temperature was 991℃,and the termination temperature was 1384℃.The results of X-ray diffraction analysis indicated that the V-Ti magnetite ore was composed of titanomagnetite,peridotite,and other minerals,which is more complicated than conventional *** a result,the temperature at the maximum rate of consolidation and the temperature at the termination of consolidation are the ***_(3) and MgFe_(2)O_(4) in V-Ti magnetite may inhibit the creation of sinter necks between hematite *** phase occurs inside the pellet when the temperature surpasses 1250℃,which may accelerate particle growth and the formation of a sintering neck within the pellets.

关键词： Consolidation index Iron ore pellet mineralogical characteristics V-Ti magnetite

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Geotechnical and mineralogical Properties of the Recently Exposed Black Mud Deposits along the Northeastern Shore of the Dead Sea

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Open Journal of Geology 2020年第8期10卷 943-956页

作者： Waed Abu Alhaj Elias Salameh Department of Geology University of Jordan Amman Jordan Faculty of Science University of Jordan Amman Jordan

Along the recently evacuated shores of the retreating Dead Sea black mud deposits have been exposed and hence subjected to head ward erosion resulting in landslides and land collapses threatening herewith the infrastructure in the area. The geotechnical and mineralogical characterization of the black mud show the presence of a variety of clays including smectite, kaolinite, illite, montmorollinite and muscovite with a natural water content near the liquid limit. These geotechnical and mineralogical properties indicate that the mud is prone to rapid erosion and sliding, which actually hit the area and have until now caused damages and degrading topography and geology in the area. The study also refers the origin of the black mud and its organic content to the erosion and deposition of Upper Cretaceous-Tertiary oil shale deposits formerly covering the whole surrounding areas of the Dead Sea. The study suggests engineering solutions to the geologic degradation processes in the area, before further damage to the infrastructure takes place.

关键词： Retreating Dead Sea Land Collapses Organic Mud in Hyper-Saline Water Geological Engineering mineralogical characteristics

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mineralogical FEATURES OF ULTRAMAFIC HYPOXENOLITHS IN ALKALI-RICH PORPHYRY

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Geotectonica et Metallogenia 2003年第Z1期 81-90页

作者： LIU Xianfan , YANG Zhengxi, LIU Jiaduo, ZHANG Chengjiang, WU Dechao and LI Youguo(Institute of Earth Science, Chengdu University of Technology, Erxianqiao Dongsan Road 1#,Chengdu, SC610059, China)

Ultramafic hypoxenoliths found in the alkali-rich porphyry in the Liuhe Village, Heqing, Yunnan, China, are of great significance in understanding the origin and evolution of the porphyry. This paper discusses the mineralogical features of the hypoxenoliths. It shows that the xenoliths are characterized by the upper mantle rocks modified to certain extent by the enriched mantle fluid metasomatism in the mantle environment, with the enriched mantle property of low-degree partial melting. This constitutes the important mineralogical evidence for the petrogenesis and mineralization of alkali-rich porphyry.

关键词： alkali-rich porphyry deep-source xenoliths enriched mantle low-degree partial melting mineralogical characteristics

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