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The United States imports 80 to 90 percent of its refractory-grade chromite from the Philippines, and its basic refractory technology has been designed upon the chemical
узнать больше2023.5.1 Based on detailed studies of the metallogeny and prospecting rules of the Luobusa chromite deposit in Tibet, Wang et al. (2010) pointed out that the occurrence of
узнать больше2021.6.3 Chromite and ferrochrome closely follow developments in China. The recovery trend across the chromium supply chain has been underpinned by recovering
узнать больше2020.11.6 研究目的 铬铁矿的形成与基性—超基性岩有关,对于铬铁矿的成因机制存在诸多争议,深化铬铁矿的成因研究对于实现铬铁矿找矿突破具有重要意义。 研究方法 通过对前人研究成果的梳
узнать больше2022.7.29 The chromite ore mineralisations, which form the basis of the study, are located within the unit of the Lower Cretaceous ‘ophiolite nap’. The ophiolite layer is
узнать больше1991.11.21 chromite and quartz sandstone (0.25 to 4.5 m thick), chromite sandstone (1.5 to 3.0 m thick), and chromite and quartz sandstone (1.0 to 2.8 m thick). These layers
узнать больше2018.1.19 Ming-Feng Ye and Guang-Liang Wu. Abstract The investigations on chemical composition, mineral composition, embedded figures, texture and
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узнать больше1988.1.1 Chemical grade chromite ore, used to manufacture sodium dichromate, generally has a Cr203 content of over 44%, with a Cr:Fe ratio of about 1.5, and a silica
узнать большеChromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite
узнать больше2023.2.8 文章评论. 摘要: 【研究目的】 铬铁矿的形成与基性—超基性岩有关,对于铬铁矿的成因机制存在诸多争议,深化铬铁矿的成因研究对于实现铬铁矿找矿突破具有重要意义。. 【研究方法】 通过对前人研究成果的梳理,总结了铬铁矿的成矿类型、成矿时代、矿体 ...
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узнать больше2022.7.20 The chromite ore was oxidized in an Elite BRF15/5 chamber furnace (UK) equipped with a programmable temperature controller. A ceramic (99.8% Al 2 O 3) square crucible containing 20 g of the specific size-fractioned metallurgical-grade chromite ore (d90 of 133 to 778 µm) was placed in the center of the furnace chamber. During oxidation, the ...
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узнать больше2021.6.1 目前,我国历史遗留铬渣堆场多数采用湿法解毒工艺进行处理,但大量化学药剂的添加不仅增加了成本,引入了污染物,而且随时间的延长铬渣中的Cr(Ⅵ) 源源不断的返溶,场地出现返黄现象,形成二次污染。为了持久稳定的修复铬渣,研究人员提出用微生物修复技术处理湿法解毒后铬渣中Cr(Ⅵ) 的 ...
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узнать большеChromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4 ). It is dark gray to black in color with a metallic to submetallic luster and a high specific gravity. It occurs in basic and ultrabasic igneous rocks and in the metamorphic and sedimentary rocks that are produced when chromite-bearing rocks are altered by heat or ...
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узнать большеChromite is the most important chromium ore mineral. It forms a complete solid solution series with many other members of the group, eg. in the Chromite-Hercynite Series, Chromite-Spinel Series, Chromite-Magnetite
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узнать больше2023.6.13 Alluvial, podiform, and stratiform deposit types are the commercially exploitable chromite ore sources [9,10,11]. Of these deposit types, stratiform-type chromite deposit ores are mainly exploited due to their large lateral continuity and regular layering . The value of chromite ore is however determined by the Cr 2 O 3 content and the Cr/Fe
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узнать больше2018.1.19 The macroscopic morphology of the chrome ore is shown in Fig. 1. The block size of the lump ore ranges in 10–50 mm. The texture is very compact, the speci fic gravity is 4.6, the surface is grayish black, mingling with some sporadic light white, yellow and green materials. There are no speci fic cleavages appear after breaking the ore.
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узнать больше2020.10.6 Different Pathways for Cr(III) Oxidation: Implications for Cr(VI) Reoccurrence in Reduced Chromite Ore Processing Residue. Environmental Science Technology ( IF 11.4 ) Pub Date : 2020-09-09 , DOI: 10.1021/acs.est.0c01855
узнать большеAccording to data from the International Chromium Development Association (ICDA), global chromite ore and concentrate production totaled 29.4 metric tons in 2014 (Richard, 2015).Data from the US Geological Survey (USGS) estimated world production in 2014 at 29 metric tons, with South Africa at 15 metric tons, followed by Kazakhstan at 4 metric tons,
узнать больше摘要: 中国广泛分布有不同时期的蛇绿岩。. 相对于全球一些大型蛇绿岩铬铁矿床 (如 Kempirsai,Bulquiza,Guleman 等), 我国同期蛇绿岩中赋存的铬铁矿床规模都较小 (如萨尔托海,东巧,罗布莎等)。. 近.来的研究认识到绝大多数成矿的蛇绿 岩都形成于俯冲带上覆岩石圈 ...
узнать больше2016.1.1 Chromite (Cr) occurs exclusively in mafic and ultramafic igneous rocks (Papp and Lipin, 2006).Although some Cr-based minerals such as crocoite (PbCrO 4), vauquelinite (Pb 2 Cu[CrO 4][PO 4]), uvarovite (Ca 3 Cr 2 [SiO 4] 3), and merumite (4(Cr,Al) 2 O 3 3H 2 O) are well known, chromite (FeCr 2 O 4) is the only one that is a
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