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- W2565837269 abstract "This paper focuses on the separation of demineralized graphite from Bent Um Qureia ore at the Eastern desert of Egypt. Minerals in Ore were evaluated by XRD and SEM in vestigations and two routes were used. The first route included fine grinding, hydrocyclone and flotation from which a poor grade and low yield of carbon were obtained. The second included jaw crushing, attrition scrubbing, triple hydrocyclone separation and two flotation circuits using kerosene as a collector followed by acid leaching. Factors affecting the graphite grade and separation efficiency ηs were investigated. A mathematical model is suggested to explain the results based on the thermodynamic properties of the minerals involved. Results obtained rev1aled the presence of 14 % by weight of carbon in the ore. A further seven undesired minerals, namely antigorite, talc, chlorite, tremolite, feldspar, calcite and quartz were present in ascending order. The second route was found acceptable for achieving high ?p and ηs values. Most of these minerals cohered to graphite by interface forces of a physical order. So hydrometallurgical acid leaching was applied to remove calcite and silicate-bearing minerals. The activation energy ΔE of this step amounts to 44.42 kJ/mol. Low ash graphite grade (0.2% ash) with an ηs value amounting to 98.5% was successfully separated. The method applied complies with pollution control measures. The processed water is recyclable and the tailings were found suitable for use in the refractory industry." @default.
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- W2565837269 date "2000-07-01" @default.
- W2565837269 modified "2023-09-22" @default.
- W2565837269 title "Separation of Demineralized Graphite from Egyptian Ore by Hydrometallurgical Treatments" @default.
- W2565837269 doi "https://doi.org/10.6967/jcice.200007.0309" @default.
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