A process for separating Anthracite and low quality carbon from refuse. Crushed refuse is admixed with water from a water storage source. The admixture is transferred to a first cyclone separator to divide the admixture into a refuse rich slurry stream and a carbonaceous rich slurry stream. The refuse rich slurry stream is dewatered through a vibrating screen and the water collected sent to the raw feed sump source. The carbonaceous rich slurry is directed to a second cyclone separator to separate low quality carbon from high quality carbon, the high quality carbon is transferred to a third cyclone separator used to separate the media water therefrom. The separated media water is returned via a siphon leg to the raw feed sump, and the dewatered high quality Anthracite is available for markets requiring higher quality carbon.

A process for separating Anthracite and low quality carbon from refuse. Crushed refuse is admixed with water from a water storage source. The admixture is transferred to a first cyclone separator to divide the admixture into a refuse rich slurry stream and a carbonaceous rich slurry stream. The refuse rich slurry stream is dewatered through a vibrating screen and the water collected sent to the raw feed sump source. The carbonaceous rich slurry is directed to a second cyclone separator to separate low quality carbon from high quality carbon, the high quality carbon is transferred to a third cyclone separator used to separate the media water therefrom. The separated media water is returned via a siphon leg to the raw feed sump, and the dewatered high quality Anthracite is available for markets requiring higher quality carbon.

A dense medium separation device for separating a mixture which comprises: an outer housing defining a central longitudinal axis, the outer housing comprising: an inlet in fluid communication with the outer housing; a vortex space inside at least the outer housing; an outlet assembly arrangement in fluid communication with the outer housing and inlet, the outlet assembly arrangement having: an outer body arranged about the central longitudinal axis; and at least one inner body having a portion arranged concentrically inside the outer body, the outer body and the at least one inner body defining therebetween at least two concentric and fluidly separated outlet passages in fluid communication with the inlet, each outlet passage including an outlet in fluid communication with the inlet; and a central rod extending along the central longitudinal axis within at least the vortex space, the central rod configured to rotate about the central longitudinal axis, wherein when the mixture is introduced into the inlet, the central rod is rotated in the direction of vortex flow within the vortex space and rotational flow separates respective portions of the mixture into each of the at least two outlet passages.

The invention relates to a method and system for the environmental remediation of materials that are contaminated with heavy minerals, such as heavy metals. The invention finds utility in removing heavy minerals from materials such as soils, sediments, mine tailings and ores. The invention provides a means for removing heavy minerals from contaminated materials without the use of water while reducing the generation of dust. Thus, the invention provides an environmentally friendly method for the remediation of sites that are contaminated with heavy minerals.

Upgraded coal, method of forming the same, and graphene films and quantum dots made therefrom. A method of upgrading coal includes cleaning coal to form a cleaned coal residue. The method also includes (A) reacting the cleaned coal residue with an oxidizable inorganic metallic agent, or (B) reacting the cleaned coal residue with a reducing agent, or a combination thereof, to form the upgraded coal.

The present invention relates to a method for sorting and utilizing coal and rock for a coal and rock combined mining face, and is especially applicable to the sorting and utilization of coal and rock mined from a coal and rock combined mining face when an extremely thin coal seam is used as a protective layer in combined mining of multiple coal seams. Underground gangue transport, storage and filling systems are directly established underground to convey a large amount of coal and gangue mined from the coal and rock mining face to an underground sorting and washing chamber for efficient separation of the coal and the gangue, sorted gangue is crushed and then filled in a mined-out area of a protected layer, thus realizing the environment-friendly cut and fill mining of the protective layer while the gangue is not lifted, and effectively preventing the ground subsidence caused by combined mining of multiple coal seams; sorted middlings are conveyed to a gangue power plant on the ground for power generation through a main conveying system, so that the pressure on mine coal quality is alleviated when benefits are created in the power plant, and thus the average ash content of commercial coal is reduced, and the selling price is increased. The method provided by the invention realizes the efficient utilization of coal and rock while realizing the efficient separation of coal and gangue, and has remarkable economic and social benefits and excellent promotional value.

A wide-size-fraction flotation system and process includes feeding coal slime to be floated into a stirrer, adding water to the floating coal slime in the stirrer, stirring, then feeding same into a grading cyclone through a first feeding pump for pre-grading; after grading of the coal slime in the grading cyclone, feeding overflow in the grading cyclone into a flotation column through a second feeding pump for flotation, discharging flotation tailings through an underflow port of the flotation column, collecting flotation concentrates through an overflow port of the flotation column and feeding same into a bubble generator through a fourth feeding pump, and the flotation concentrates passing through the bubble generator and being fed from the bottom of a hydraulic flotation machine; and feeding underflow in the grading cyclone into the hydraulic flotation machine through a third feeding pump, for flotation and recovery.

Fine coal is cleaned of its mineral matter impurities and dewatered by mixing the aqueous slurry containing both with a hydrophobic liquid, subjecting the mixture to a phase separation. The resulting hydrophobic liquid phase contains coal particles free of surface moisture and droplets of water stabilized by coal particles, while the aqueous phase contains the mineral matter. By separating the entrained water droplets from the coal particles mechanically, a clean coal product of substantially reduced mineral matter and moisture contents is obtained. The spent hydrophobic liquid is separated from the clean coal product and recycled. The process can also be used to separate one type of hydrophilic particles from another by selectively hydrophobizing one.

The invention relates to a method and system for the environmental remediation of materials that are contaminated with heavy minerals, such as heavy metals. The invention finds utility in removing heavy minerals from materials such as soils, sediments, mine tailings and ores. The invention provides a means for removing heavy minerals from contaminated materials without the use of water while reducing the generation of dust. Thus, the invention provides an environmentally friendly method for the remediation of sites that are contaminated with heavy minerals.

The invention relates to a method and system for the environmental remediation of materials that are contaminated with heavy minerals, such as heavy metals. The invention finds utility in removing heavy minerals from materials such as soils, sediments, mine tailings and ores. The invention provides a means for removing heavy minerals from contaminated materials without the use of water while reducing the generation of dust. Thus, the invention provides an environmentally friendly method for the remediation of sites that are contaminated with heavy minerals.