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and a small amount of limonite (1-2 μm) distribute unevenly in laminar bixbyite. And 49.53% (mass fraction) of manganese exists in iron mineral isomorphously. Reduction of manganese oxide and iron oxide both......
菲律宾某尾矿中金的赋存状态王玲1(1.北京市北京矿冶研究总院 矿物加工科学与技术国家重点实验室)摘 要:菲律宾某尾矿库中矿样是金矿全泥氰化的浸渣,含Au0.88g/t,含Ag4.94g/t.在传统显微镜观察及化学物相分析等研究方法基础上,结合矿物自动分析仪MLA查明尾矿库中金的赋存状态.矿样中82.95%的金以自然金,银金矿形式存在,17.05%以碲金矿,碲金银矿形式存在.自然金,银金矿产出粒度一般小于0.125mm,碲金矿,碲金银矿产出粒度均小于0.020mm,金矿物产出特征复杂,主要以硫化矿物包裹体,褐铁矿......
was granularity minus 0.30 mm powder and rich in specularite, limonite and Mg-Mn siderite from Jiuquan Iron & Steel (Group) Co. Ltd (JISC) were briefly reviewed. The phase transformation and microstructure..., Valix M. Reduction roasting of limonite ores: effect of dehydroxylation[J]. International Journal Mineral Processing, 2006, 80(2/4): 88-99. [7] 罗立群, 张泾生, 高远扬, 等. 菱铁矿干式冷却磁化焙烧技术研究[J]. 金属矿山, 2004(10): 28-31......
process prior to cyanide leaching. Gold was observed to be present as native and electrum (6-24 μm in size) and associated with limonite, goethite and lepidocrocite within calcite and quartz matrix. Mineral liberation analysis (MLA) showed that electrum is found as free grains and in association with beudantite, limonite/goethite and quartz. Silver was mainly present as acanthite (Ag2S......
of ferrous were studied. The optimum reaction parameters were obtained. The results show that the content of Fe2O3 in RM is 27.93%, and hematite and limonite are the major crystalline phase......
grade limonite type nickel laterite ore sample assaying 0.97% Ni from Indonesia were studied using optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe......
of seconds. In a weakly reducing atmosphere and at 740-800 ℃, refractory powder iron material (<0.30 mm) which is rich in specularite, limonite and Mg-Mn siderite was subjected to FRR for a few seconds... structure, with banded, block and disseminated structures. The recoverable iron minerals in the ore are weakly magnetic specularite, Mg-Mn siderite and limonite, with a ratio of 2.4:1:1.4. The iron grade......
is 9% of the whole bed. New characteristic is shown by contrasting of limonite and magnetite or hematite sintering process: the influence of preheating and drying zone becomes weak; the determinant......
., Ltd., Changsha 410015, China; 5. College of Environment and Planning, Henan University, Kaifeng 475001, China) Abstract: Iron cap formed from limonite is an important prospecting symbol of bauxite......