Abstract: 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.

Abstract: Provided is an electronic device for processing a series of images, the series of images being obtained by shooting a scene containing a static object and a dynamic object, the electronic device comprises a processing circuit which is configured to: select a particular image containing the static object among the series of images; generate a motion trajectory of the dynamic object in at least some of the series of images; and obtain a final image on the basis of both of the particular image and the generated motion trajectory of the dynamic object.

Abstract: Disclosed is high-ash fine coal slime separation equipment and method, applicable to the field of coal washing. The high-ash fine coal slime separation equipment includes a feeding system (1), a mineralization system (2), a separation system (3) and a pulsating water flow control system (4). A coal slime mineralization region is isolated from a separation region; and a damping block and a pulsating water flow device are arranged in a mineral separation system. A flotation feeding is fed into the feeding system (1), slurry mixing operation is completed, coal slime enters the mineralization system after pulp mixing to generate turbulent collision to form mineralized bubbles, the mineralized bubbles enters the separation system (3) after passing through a turbulent-flow dissipation pipe (12), and meanwhile, pulsating water flow with a certain frequency and waveform is fed into the separation system (3) by the pulsating water flow control system (4).

Abstract: A pre-flotation high efficiency slurry conditioning device for wide-particle-grade flotation, suitable for coal slime flotation.

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding exploited raw coal into a ?25 mm raw coal classifying screen for screening; performing dry coal preparation on a classifying screen oversize product with a particle size greater than 25 mm and feeding a classifying screen undersize product with a particle size less than 25 mm into a special underground compact jigging machine for sorting to obtain jigging machine overflow clean coal, jigging middling coal and jigging gangue; screening and dewatering the jigging machine overflow clean coal to obtain a clean coal product, and screening and dewatering the jigging middling coal to obtain a middling coal product, sorting slime water to be sorted and generated during sorting to obtain coarse clean coal slime and coarse middling coal slime, and performing circulating water treatment on a final liquid.

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding raw coal into a special underground compact jigging machine to discharge overflow clean coal being dewatered through a ?1 mm fixed screen and screened through a ?13 mm classifying screen, and dewatering powder clean coal with a particle size less than 13 mm to obtain powder clean coal and a centrifugate; grading jigging middling coal by means of a ?13 mm classifying screen into block middling coal and powder middling coal, and dewatering the powder middling coal to obtain powder middling coal and a centrifugal liquid; and sending produced coal slime water to a water medium classifying and separation cyclone, and the obtained coarse middling coal slime and coarse clean coal slime respectively passing through a coarse middling and clean coal slime sieve bends, and then being dewatered.

Abstract: 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.

Abstract: Disclosed is high-ash fine coal slime separation equipment and method, applicable to the field of coal washing. The high-ash fine coal slime separation equipment includes a feeding system (1), a mineralization system (2), a separation system (3) and a pulsating water flow control system (4). A coal slime mineralization region is isolated from a separation region; and a damping block and a pulsating water flow device are arranged in a mineral separation system. A flotation feeding is fed into the feeding system (1), slurry mixing operation is completed, coal slime enters the mineralization system after pulp mixing to generate turbulent collision to form mineralized bubbles, the mineralized bubbles enters the separation system (3) after passing through a turbulent-flow dissipation pipe (12), and meanwhile, pulsating water flow with a certain frequency and waveform is fed into the separation system (3) by the pulsating water flow control system (4).

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding exploited raw coal into a ?25 mm raw coal classifying screen for screening; performing dry coal preparation on a classifying screen oversize product with a particle size greater than 25 mm and feeding a classifying screen undersize product with a particle size less than 25 mm into a special underground compact jigging machine for sorting to obtain jigging machine overflow clean coal, jigging middling coal and jigging gangue; screening and dewatering the jigging machine overflow clean coal to obtain a clean coal product, and screening and dewatering the jigging middling coal to obtain a middling coal product, sorting slime water to be sorted and generated during sorting to obtain coarse clean coal slime and coarse middling coal slime, and performing circulating water treatment on a final liquid.

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding raw coal into a special underground compact jigging machine to discharge overflow clean coal being dewatered through a ?1 mm fixed screen and screened through a ?13 mm classifying screen, and dewatering powder clean coal with a particle size less than 13 mm to obtain powder clean coal and a centrifugate; grading jigging middling coal by means of a ?13 mm classifying screen into block middling coal and powder middling coal, and dewatering the powder middling coal to obtain powder middling coal and a centrifugal liquid; and sending produced coal slime water to a water medium classifying and separation cyclone, and the obtained coarse middling coal slime and coarse clean coal slime respectively passing through a coarse middling and clean coal slime sieve bends, and then being dewatered.