An air knife includes a housing having a first end, a second end spaced from the first end in a longitudinal direction, a side wall extending from the first end to the second end, an interior, an entrance aperture configured to be connected to a source of pressurized air to increase a pressure of air inside the housing and an exit aperture. A nozzle is located at the exit aperture and has a nozzle inlet in fluid communication with the exit aperture and also has a nozzle outlet. A plurality of baffles are located in the interior of the nozzle, and each of the baffles is angled relative to the longitudinal direction. Also an assembly of a plurality of the air knives.

An air knife includes a housing having a first end, a second end spaced from the first end in a longitudinal direction, a side wall extending from the first end to the second end, an interior, an entrance aperture configured to be connected to a source of pressurized air to increase a pressure of air inside the housing and an exit aperture. A nozzle is located at the exit aperture and has a nozzle inlet in fluid communication with the exit aperture and also has a nozzle outlet. A plurality of baffles are located in the interior of the nozzle, and each of the baffles is angled relative to the longitudinal direction. Also an assembly of a plurality of the air knives.

Disclosed is a method for treating fly ash containing an initial carbon concentration to obtain ash containing a predetermined final carbon concentration less than the initial concentration, the method including: a step of granulometric separation of the ash into at least two fractions, a coarse traction and a fine fraction, the coarse fraction having a granulometry greater than the fine fraction; a step of extracting carbon from the ash; a method wherein the extraction step is subsequent to the separation step, the extraction step being implemented solely on the coarse fraction, by electrostatic separation, the method including a step of drying the ash during which the temperature of the ash is above 60 C.

Provided is a dry separation apparatus including: a main body; a first deck; a plurality of guides; a supply part; an air blow fan; and a vibration part. A dry separation method includes: supplying an object to be separated to a top surface of a first deck provided with a plurality of punches; sending, by an air blow fan, air to the punches (first punches); and horizontally vibrating, by a vibration part, the first deck so as to discharge particles which have different specific gravities of the object to be separated and a moveable force exerted by air passing the first punches through different passages.

Provided is a dry separation apparatus including: a main body; a first deck; a plurality of guides; a supply part; an air blow fan; and a vibration part. A dry separation method includes: supplying an object to be separated to a top surface of a first deck provided with a plurality of punches; sending, by an air blow fan, air to the punches (first punches); and horizontally vibrating, by a vibration part, the first deck so as to discharge particles which have different specific gravities of the object to be separated and a moveable force exerted by air passing the first punches through different passages.

A refractory recycling system includes a network of refractory aggregates including a first contaminant and an individual refractory component desired to be separated from the first contaminant, a computing device configured to determine a first critical velocity for separating the first contaminant from the individual refractory component, the first critical velocity being determined based on a mechanical property of the first contaminant, and a refining apparatus for refining the network of refractory aggregates. The refining apparatus is configured to receive the network of refractory aggregates, generate the first critical velocity based at least in part on a projecting mechanism, impart the first critical velocity to the network of refractory aggregates, thereby causing the first contaminant to separate from the individual refractory component, and provide a first refined set of particles of the network of refractory aggregates, the first refined set of particles comprising the individual refractory component.

A refractory recycling system includes a network of refractory aggregates including a first contaminant and an individual refractory component desired to be separated from the first contaminant, a computing device configured to determine a first critical velocity for separating the first contaminant from the individual refractory component, the first critical velocity being determined based on a mechanical property of the first contaminant, and a refining apparatus for refining the network of refractory aggregates. The refining apparatus is configured to receive the network of refractory aggregates, generate the first critical velocity based at least in part on a projecting mechanism, impart the first critical velocity to the network of refractory aggregates, thereby causing the first contaminant to separate from the individual refractory component, and provide a first refined set of particles of the network of refractory aggregates, the first refined set of particles comprising the individual refractory component.

Systems and methods are provided for separating seed from wet material. The method includes aerating raw, wet material comprising seed to provide an aerated material and aspirating the aerated material. The aspirating separates seed from liftings of the aerated material, and the separated seed can then be recovered.

A powder recycling machine includes a casing, a powder collector, a dust-sucking system and a dust-removing system. An accommodation space within the casing is divided into a first space and a second space by a partition plate. The powder collector is disposed within the first space for collecting excess powder from the first space. The dust-sucking system includes a connector, a cyclone separator and a first suction device. The connector, the cyclone separator, the first suction device and the powder collector are sequentially in communication with each other through plural transmission ducts. The dust-removing system includes a second suction device. The first space, the second suction device and the powder collector are sequentially in communication with each other through plural guiding ducts. After the excess powder suspended in the first space is introduced into the dust-removing system, the excess powder is transferred to the powder collector.

A dedusting apparatus is provided with movable inlet deflectors that are positionally controlled by actuators to vary the rate of flow of particulate material over the wash decks. The inlet deflectors are formed with a fixed member that extends between the front and rear walls of the dedusting apparatus and extends downwardly from the top wall to terminate in a spaced relationship to the surface of the wash decks. A movable member is operatively coupled to an actuator to overlie the fixed member and be movable to be adjacent the surface of the wash deck to terminate flow of material past the deflectors. Particulate material can accumulate above the wash decks and between the deflectors to fill the volume to the inlet opening to permit a full loading of flow over the full width of the wash decks when the deflectors are raised by the actuators.