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2.1. Coal gangue Coal gangue is a typical solid waste produced during coal mining and preparation. The chemical compositions of coal gangue mainly include SiO2, Al2O3, Fe2O3, Na2O, CaO, MgO, TiO2, K2O and organic components (Table 1). The main mineral compositions of coal gangue include quartz, kaolinite, and other clay minerals [25].
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Coal gangue used in this study was obtained from JingYang Coal Washing Plant, which is located in Baotou City of China. The mineralogical phase was characterized by XRD as shown in Fig. 1.It indicates kaolinite (Al 2 O 3 ·2SiO 2 ·2H 2 O) and quartz (SiO 2) are the major crystallized minerals presented in the raw coal gangue.The chemical composition and physical properties of raw coal …
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The principal constituent mineral has been reported to be goethite, with minor quantities of haematite, maghemite, siderite, quartz, kaolinite, pyrite, and an average of 0.09% S [ 8, 9, 73 ]. The Agbaja iron ore is also reported to have a high phosphorus content in the range of 0.76–2.13% [ 25, 26, 75] which makes its use in iron making in ...
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Maximum compressive strength was found at 50% GGBS with mix id GP.6.8.50 as 25.60 MPa at the curing of 28 days with ambient environment at Na2O = 6% and SiO2 = 8%. View Show abstract
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Solvent Extraction & Electrowinning. Mine Life. 20 years (as of Jan 1, 2020) Mutanda was placed into care and maintenance in November 2019 and has remained on care and maintenance during 2020. Studies into alternatives to restart operations - oxide and/or sulphides - are continuing. Glencore will restart operations at the world's largest ...
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