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  • Contaminant or benefit? Regional patterns in ...

    Contaminant or benefit? Regional patterns in characteristics of coarse coal rejects and implications for rehabilitation of coal mines in the Bowen Basin (2001)

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  • Results Of Field Trials Of Co-Disposal Of Coarse ... - CORE

    Coarse coal rejects are conventionally loose-dumped while fine coal tailings are conventionally thickened and disposed of as an aqueous slurry in a mine tailings deposit area. The easy ingress of water and oxygen makes loose, coarse rejects prone to spontaneous combustion, degradation and acid generation.

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  • BALDY RIDGE EXTENSION PROJECT

    5. Coal conveyance corridor, breaker station and coal stockpiles: • Potential relocation of existing raw coal conveyor tunneled through Baldy Ridge. 6. Soil stockpiles 7. Storage and management of coal rejects: • expansion of the existing CCR Pile to accommodate coal rejects from the Project. 8. Storage and management of tailings:

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  • COARSE DRY COAL CLEANING - Energy

    COARSE DRY COAL CLEANING R. Q. Honaker University of Kentucky Department of Mining Engineering Lexington, Kentucky, USA 40506-0107 Workshop on Coal Beneficiation and Utilization of Rejects : Initiatives, Policies and Best Practices Ranchi, India August 22 – 24, 2007

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  • IBMD - One of the Leading Coal Washery Rejects Suppliers ...

    Coal Rejects are a by-product of the coal washing / beneficiation process, in which after separation of beneficiated washed coal and middling, the rejects are left over as a portion of raw feed coal. These are generated from the coarse circuit of the coal washery process. No additional crushing or blending is required for its usage.

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  • 4. Project Alternatives - ceaa.gc.ca

    Murray River Coal Project | 4-1 4. PROJECT ALTERNATIVES ... − location/design of coarse coal rejects storage area; ... It is important to recognize that Project alternatives are inter-connected, and that decisions for one topic cascade down to other topics.

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  • A goal for better coal - Australian Mining

    Centennial Coal, one of New South Wales' premier coal companies, explains what's in store for 2019 and beyond. ... More commonly called 'rejects', Centennial has both coarse and fine variants that are emplaced in walls (for coarse rejects) or dams (for fines rejects) in .

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  • (PDF) Permeability and seepage stability of coal-reject ...

    Conclusions Coal-rejects exhibit different geotechnical properties due to their different origins, compositions, structures, weathering conditions, etc. The permeability is one of the most important properties of coal-rejects for their applications in road and .

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  • D.1 0194106 Executive Summary EN - Canada.ca

    • dewatering of flotation tailings will allow co-mingling of coarse and fine coal rejects in a single facility so there will be no subaqueous tailings storage, reducing closure liability. Key improvements to Project design that resulted through the course of the pre-Application/pre-EIS

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  • coal mill rejects sale - keithkirsten

    phase 2 beneficiation technologies study summary - Duke Energy. LOI ash is routed to a silo for storage prior to sale, while the higher LOI ash is .... materials are highly variable; some contain bottom ash, coal mill rejects, and/or...

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  • Major Mines & Projects | Fording River Mine

    Coal sized at -0.75 mm enters a fine coal circuit that includes water only cyclones, spirals, sieve bends, froth flotation cells, thickeners, centrifuges, and the thermal dryer. Coarse rejects are directed to a bin for loading into haul trucks.

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  • A practical testing approach to predict ... - ScienceDirect

    The particle size of coarse coal rejects normally ranged from 0.1 to 50 mm, and fine coal tailings had a size of less than 0.1 mm. Coarse particles facilitate penetration of water and oxygen, weathering, and acid generation, whereas fine particles maintain tailing deposits in a wet condition and have low shear strength (Morris and Williams, 1997).

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  • Major Mines & Projects | No. 8 (CST Coal) Mine

    The drained coarse clean coal is dewatered in four centrifuges and discharged to the clean coal conveyor. The drained coarse reject material is conveyed to the discard bin for removal by truck to be utilized in construction projects or alternatively hauled to the Flood Creek disposal facility.

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  • Recycling fine slurry an alternative to paste for coarse ...

    A coal washery generates two main waste streams: minus 50 mm coarse rejects and minus 2 mm thickener underflow tailings. Traditionally, these have been disposed of separately, with the coarse rejects transported to the disposal area by trucking or by conveyor belt and the tailings pumped to a tailings dam.

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  • (PDF) Compressive strength of concrete made with coal ...

    Compressive strength of concrete made with coal washery rejects as coarse aggregate. ... As results, the compressive strength of concrete that used granulated blast furnace slag as fine aggregate increase with increasing of concrete age as good as the concrete used nature river sand.

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  • An Economic Approach to Dewatering Coarse-Grained Coal ...

    bottom ash, coal rejects, and economizer ash may be more efficiently and more economically conveyed and deposited via hydraulic methods. Passive dewateri ng systems can be constructed outside of an energy generation facility with adequate engineering design and environmental protection goals to satisfy the intent of the rules.

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  • Co-disposal of coarse coal reject with sand mining reject ...

    At present the coarse reject is deposited above ground and rehabilitated. Adjacent to Clarence Colliery is the Kableu27s Transport Pty Ltd sand mining operation. It has been proposed that co-disposal of the rejects from both operations may produce a product whose leachate has near neutral pH.

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  • Appendix N: Tailings and Rejects Management Plan

    The storage, handling and disposal of coal rejects and dewatered tailings are outlined in the following sections and provide a comprehensive description of the process to be installed at Caval Ridge. 1.2 Coal Rejects Processing Rejects are generated from the coarse and reflux classifier circuit within the coal handling and preparation plant (CHPP).

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  • A new way to dispose of course coal rejects - Ausenco

    To improve efficiency and environmental sustainability for a coal mine in New South Wales, Australia, the Ausenco team developed an innovative method of disposing of coarse coal rejects from the Coal Handling Processing Plant back into an operational goaf.

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