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generations, the lower older section and the upper younger section. The older section contains the carbonate-fluorapatite todorokite and goethite, besides vernadite, amorphous FeOOH?xH2O, quartz, feldspar......
processes including goethite to hematite at roasting temperature 277 ℃ and lizardite dehydroxylation at roasting temperature 610 ℃, which accord with phase transformation of laterite minerals roasted......
minerals are hematite and goethite mainly, and the phosphorus mainly occurs as fluorapatite. Iron particle size of reduction sample is small and the separation of iron and phosphorus is difficult......
when the leaching temperature increased from 40 to 80 °C. The final leach residue was analyzed by XRD and XRF. The XRD results indicated that the major peaks originated from the goethite and quartz... No. 08-0449), dolomite (card No. 36-0426), quartz (card No. 70-3755), calcite (card No. 05-0586) and goethite (card No. 81-0462). Minor peaks were also determined as corkite......
. The application of zinc calcine as a neutralizing agent for the goethite process in zinc hydrometallurgy[J]. Hydrometallurgy, 2014, 147(5): 120-126. [7] 李海军, 杨洪英, 陈国宝, 周立杰, 刘媛媛. 中心复合设计针铁矿法从含钴生物浸出液中除铁[J]. 中国有色金属学报, 2013, 23(7): 2040-2046. LI Hai-Jun, YANG Hong-ying, CHEN Guo-bao, ZHOU Li-jie, LIU Yuan-yuan. Goethite deironization process for cobaltiferous bioleaching solution by central composite design[J......
贵州某低品位氧化铅锌矿物相分析鱼鹏涛1,梁杰2,陈颖1,黄岩2(1.贵州省贵阳市贵州大学材料与冶金学院2.毕节学院 化学系,贵州毕节 551700)摘 要:本实验采用X射线衍射(XRD),扫描电子电镜结合能谱(SEM-EDS)及化学物相分析等方法探明了贵州某低品位氧化铅锌矿主要元素的物相.实验结果表明:矿样中铅的物相主要有白铅矿(60.86%)和铅铁矾(22.62%);锌的物相主要有锌氧化物(63.79%)和硅酸锌(15.20%);铁的物相主要有褐铁矿(其中主要为针铁矿)和赤铁矿(共87.30%);铝的物相主要......
particles about 10 μm and porous, like goethite sandwiching clayey kaolinite. An iron ore concentrate with total iron content of 56.74% at a recovery rate of 95.54% can be obtained, performed at 800......
analysis, FROST and KLOPROGGE[7] found that diaspore was isostructural with goethite. The structure of diaspore is based on oxygen atoms in hexagonal close packing. Hydroxyls are found at the corners of octahedra and aluminum atoms in the center of octahedra. Octahedra are linked together by edge sharing to form double chains. The adsorption of metal ions on goethite has been studied in the recent......
during the Bayer process. The selection of Bayer process depends on the kinds of bauxite. Low temperature Bayer process only can deal with gibbsitic bauxite [2-4]. Goethite and hematite are commonly...] studied the lateritic gibbsitic bauxite and confirmed the shapes of gibbsite, goethite and hematite. Gibbsite crystal presents hexagonal-platelet morphology or flaky, goethite is kidney shape, crusty......
from limonite-type laterite ores due to its low reactivity with goethite, in which nickel was involved[6-7]. In this work, extraction of cobalt from limonite-type laterite ores was studied by citric... contained goethite (FeOOH) and gibbsite (Al2O3·3H2O); minority pyrolusite and poor-crystallized kaolinite were also found by optical microscopy. Surface scanning images obtaimed by SEM showed......
