A device (10) for welding components by ultrasound. The device (10) comprises a sonotrode (11) having a sonotrode head (12) which can be excited by a vibration generator to produce torsion vibrations with respect to a torsion axis (T). At least one welding surface (14) is arranged on the peripheral side on the sonotrode head (12) with respect to the torsion axis (T). The device (10) also comprises a support device (15) which supports the sonotrode head (11) in a support area (16), which contains a vibration node of the sonotrode head (12). The support area (16) and the welding surface (14) at least partially extend along a common plane (E) which extends perpendicular to the torsion axis (T). A device (10) for welding components by ultrasound by using a temperature control device are also disclosed.

A device (10) for welding components by ultrasound. The device (10) comprises a sonotrode (11) having a sonotrode head (12), which can be excited by a vibration generator to produce torsion vibrations with respect to a torsion axis (T). At least one welding surface (14) is arranged on the peripheral side on the sonotrode head (12) with respect to the torsion axis (T). The device (10) also comprises a support device (15) which supports the sonotrode head (11) in a support area (16), which contains a vibration node of the sonotrode head (12). The support area (16) and the welding surface (14) at least partially extend along a common plane (E) which extends perpendicular to the torsion axis (T). A device (10) for welding components by ultrasound by using a temperature control device are also disclosed.

A method of washing and grading silica sand for glass production includes removing trash and relatively large contaminants from a sand feed material via a sequence of multiple vibrating screens, collection sumps, hydrocyclones, a density separator, a classification tank, and a dewatering screen. The resulting silica sand product is suitable for glass production.

A screening apparatus comprising a body, a drive system for imparting vibrations to the body, and screen media that is coupled to the body by a resilient coupling mechanism that allows oscillatory movement of the screen media with respect to the body. In response to vibration of the body, the resilient coupling mechanism causes the screen media to oscillate in a manner that is amplified with respect to the vibration of the body. The amplification may depend on the frequency of the vibrations of the body and/or on the mass of any material gathered on the screen media.

A screening system (10) comprising at least one first substantially annular screen support (11) and a second substantially annular screen support (12); at least one pressure rod (14), which braces the screen supports (11, 12) with each other in such a manner that a compressive stress is produced between the screen supports (11, 12); at least one substantially cylindrical outer screen surface (13), which is clamped between the screen supports (11, 12); and at least one resonator (15) for the introduction of ultrasonic vibrations directly into the screen surface (13). The resonator (15) may be fastened to the screen surface (13) and essentially runs from the first screen support (11) to the second screen support (12). An eddy-current screening machine is also disclosed.

A screening tool includes at least a first screen lining which is coupled to a metal coupling element to which an ultrasonic transducer is connected which is connected by electrical lines to an ultrasonic generator. The screening tool includes a metal work plate which has a connection region and at least one first transfer region with first transfer openings, which first transfer region forms the first screen lining through which particles of the process material which are larger than the transfer openings can pass, from particles of the process material smaller than the transfer openings, wherein the coupling element is a curved or straight rod having a first end piece welded to the connection region and a second end piece mechanically connected to the ultrasonic transducer. The screening device includes one or more such screening tools and a control unit by means of which the ultrasonic generator is controllable.

A screening device for separating dry granular material into a fine fraction and a coarse fraction is provided. The screening device includes a drum screen defined by an open rotatable frame, which frame defines a circumferential wall, and a sheet-like screen arranged over the circumferential wall of the frame. The screening device also includes a driving device by means of which the drum screen is rotatably driven, a feed opening at a short end of the drum screen and a discharge opening at the opposite short end of the drum screen. The screening device further includes a vibration device which rotates along with the drum screen, which vibration device includes one or more vibrating elements mounted to the drum screen, which set the drum screen vibrating in use. A method for separating dry granular material into a fine fraction and a coarse fraction is also provided.

A dewatering system includes a platform having a first side configured to receive a material thereon and an opposing second side, the platform having a plurality of pores extending between the first and second side, wherein the material comprises a solid portion and a liquid portion; and an ultrasound transducer in communication with the platform and configured to vibrate the material on the platform such that the liquid portion passes through the plurality of pores and the solid portion remains on the platform.

A conditioner for filtering and drying recyclable abrasive media, such as steel grit, garnet, or other abrasive media used for abrasive blasting operations for steel structures, such as bridges, tanks, and marine vessels that are being repainted. The conditioner may include a pre-classifier (e.g., a trommel) to separate or filter the abrasive media from larger debris that may be vacuumed with the abrasive media during resurfacing operations. A dryer may use radiation elements (e.g., infrared (IR) lamps) positioned above a conveyor (e.g., vibration tray) that moves the abrasive media beneath the radiation elements. Vacuum airflow may bypass the dryer except for a portion of the vacuum airflow used to remove moisture from the dryer while drying the abrasive media. The conditioner may have a drying portion or the entirety under negative pressures.

An apparatus which allows a flexible classification of poly- and/or monocrystalline silicon comprises a winnowing device configured to separate crushed material of poly- and/or monocrystalline silicon into a fine fraction and a coarse fraction. The apparatus also comprises an optoelectronic sorting device configured to separate the coarse fraction into at least two fractions.