Mineralogy and pre-concentration of the chromite overburden of the Sukinda Ultramafic Belt, Orissa, India

Abstract Physical, mineralogical and geochemical characterization, along with some beneficiation approach to pre-concentrate the Ni content of the chromite overburden material of the Sukinda Valley, India, have been carried out in detail. Mineralogically, the overburden consists of geothite, quartz, hematite, magnetite and secondary silicates in varying proportions. A specific Ni mineral phase is absent in this material with the Ni and Fe being mostly enriched in finer fractions. Distribution of Ni and Fe in various size fractions and increase of Ni with increase in Fe (goethite content) indicate that goethite is the major Ni-bearing mineral phase. Quantitative estimation of goethite from chemical analysis and weight loss data indicates that the goethite quantity varies from 40% to 90%. Electron microprobe analysis (EPMA) indicates that Ni-rich and Ni-poor goethite are present in the overburden material. A sequential dissolution study indicates that more than 50% of the Ni are present within the goethite lattice as a lattice substitution. The results of pre-concentration studies (size classification, gra
Keywords: Chromite overburden, Mineralogy, Pre-concentration.
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Summary: The level of scientific knowledge about the effects of contaminants is increasing and changes in environmental monitoring are likely to allow for the assessment of environment effects particularly to the aquatic environment. This paper provides an overview of recent developments in this area which include the environmental effects monitoring program for pulp and paper operations, the assessment of the Aquatic Effects of Mining (AQUAMIN) program, the Aquatic Effects Technology Evaluation...
Publication: CIM Bulletin
Author(s): N.C. Garisto
Keywords: Environmental monitoring, Aquatic environment.
Issue: 1038
Volume: 93
Year: 2000
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Summary: Several reviews of mineral project performance in the past 35 years indicate a pattern of occasional, but recurrent, mining project failures due to shortcomings in geological information and estimation, mineral processing and metallurgical testing, feasibility study objectives and requirements, and project start-up methods. A commitment to quality assurance and continuous improvement methods and to obtaining ÒENOUGH DATA, OF APPROPRIATE QUALITYÓ is essential. Recent international and Canadian...
Publication: CIM Bulletin
Author(s): M. Vallée
Keywords: Feasibility studies, Ore reserve estimation, Resource definition, Reserve definition, Setting New Standards.
Issue: 1038
Volume: 93
Year: 2000
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