The disclosure discloses wet electrostatic classification device for ultrafine powder based on rotating flow field, which belongs to the field of ultrafine powder classification equipment. The wet electrostatic classification device for ultrafine powder of the disclosure includes a cylinder body. The cylinder body is a hollow cavity. A material conveying shaft and a rotating shaft are disposed in the cylinder body. Outlets are formed in a circumferential wall of the cylinder body. A deceleration motor is mounted on the lower end through a machine frame. First electrode pieces are disposed on an inner wall. The spray head is mounted between the material conveying shaft and the rotating shaft. The rotating shaft is connected to the deceleration motor through a coupling. Second electrode pieces are disposed on outer walls of the material conveying shaft and the rotating shaft. The spray head is configured to spray a material into the cylinder body to form a rotating flow. The classified powder is discharged from the outlets by classification and is collected. The device integrates the rotating flow field and wet electrostatic classification, the classification efficiency of the ultrafine powder is effectively improved, multi-stage collection of classified products is achieved, the structure is compact, and the operation is simple.

The disclosure discloses wet electrostatic classification device for ultrafine powder based on rotating flow field, which belongs to the field of ultrafine powder classification equipment. The wet electrostatic classification device for ultrafine powder of the disclosure includes a cylinder body. The cylinder body is a hollow cavity. A material conveying shaft and a rotating shaft are disposed in the cylinder body. Outlets are formed in a circumferential wall of the cylinder body. A deceleration motor is mounted on the lower end through a machine frame. First electrode pieces are disposed on an inner wall. The spray head is mounted between the material conveying shaft and the rotating shaft. The rotating shaft is connected to the deceleration motor through a coupling. Second electrode pieces are disposed on outer walls of the material conveying shaft and the rotating shaft. The spray head is configured to spray a material into the cylinder body to form a rotating flow. The classified powder is discharged from the outlets by classification and is collected. The device integrates the rotating flow field and wet electrostatic classification, the classification efficiency of the ultrafine powder is effectively improved, multi-stage collection of classified products is achieved, the structure is compact, and the operation is simple.

The disclosure discloses wet electrostatic classification device for ultrafine powder based on rotating flow field, which belongs to the field of ultrafine powder classification equipment. The wet electrostatic classification device for ultrafine powder of the disclosure includes a cylinder body. The cylinder body is a hollow cavity. A material conveying shaft and a rotating shaft are disposed in the cylinder body. Outlets are formed in a circumferential wall of the cylinder body. A deceleration motor is mounted on the lower end through a machine frame. First electrode pieces are disposed on an inner wall. The spray head is mounted between the material conveying shaft and the rotating shaft. The rotating shaft is connected to the deceleration motor through a coupling. Second electrode pieces are disposed on outer walls of the material conveying shaft and the rotating shaft. The spray head is configured to spray a material into the cylinder body to form a rotating flow. The classified powder is discharged from the outlets by classification and is collected. The device integrates the rotating flow field and wet electrostatic classification, the classification efficiency of the ultrafine powder is effectively improved, multi-stage collection of classified products is achieved, the structure is compact, and the operation is simple.

[Object] To provide a particle sorting apparatus, a particle sorting method, and a program that are capable of efficiently sorting particles even when sizes of particles to be sorted are not uniform. [Solving Means] A particle sorting apparatus includes a charge section that imparts charges to at least a part of droplets discharged from an orifice from which a fluid stream is generated, and a charge control section that adjusts a charge amount to be imparted to the droplets by the charge section. Further, the charge control section is structured to adjust the charge amount according to sizes of particles included in the droplets.

A method to separate and recover at least one metal from a source of oxidized and/or primary and secondary sulfide ores by determining and modifying the values of the dielectric constant of the minerals source.

A cleaning apparatus includes a scraper and a support member. The scraper is in contact with a surface of a recovery roller to clean out residuals from the surface. A base portion of the scraper is held between and a fixing plate and a supporting plate. In this case, a leading end of the scraper is in contact with the surface of the recovery roller while an edge of the supporting plate serving as a fulcrum. Also, a base length d of the scraper from the fulcrum to the base portion is selected to make uniform the contact pressure of the scraper.

A cleaning apparatus includes a scraper and a support member. The scraper is in contact with a surface of a recovery roller to clean out residuals from the surface. A base portion of the scraper is held between and a fixing plate and a supporting plate. In this case, a leading end of the scraper is in contact with the surface of the recovery roller while an edge of the supporting plate serving as a fulcrum. Also, a base length d of the scraper from the fulcrum to the base portion is selected to make uniform the contact pressure of the scraper.

In a device and method of removing particles from a surface of a web of material, a member is provided which is made from an electrically non-conducting material, and has an electrostatically chargeable and dischargeable surface. The surface is moved along a path to and from a particle removal area. In the particle removal area the member and the web of material interact which each other to transfer particles from the web of material to the charged member surface by electrostatic attraction. Upstream of the particle removal area, the member surface is electrostatically charged. Downstream of the particle removal area, a flow of air is generated over the member surface for removal of particles from the member surface, while electrically neutralizing the member surface and particles on the member surface. The member comprises a hollow member cylinder, having a chargeable and dischargeable outer surface movable along a circular path by rotating the member cylinder around an axis.

In a device and method of removing particles from a surface of a web of material, a member is provided which is made from an electrically non-conducting material, and has an electrostatically chargeable and dischargeable surface. The surface is moved along a path to and from a particle removal area. In the particle removal area the member and the web of material interact which each other to transfer particles from the web of material to the charged member surface by electrostatic attraction. Upstream of the particle removal area, the member surface is electrostatically charged. Downstream of the particle removal area, a flow of air is generated over the member surface for removal of particles from the member surface, while electrically neutralizing the member surface and particles on the member surface. The member comprises a hollow member cylinder, having a chargeable and dischargeable outer surface movable along a circular path by rotating the member cylinder around an axis.

An installation intended to separate the components of a mixture containing fibers (2) and granules (3) is provided. The installation comprises a tribocharger (4) for conferring an electrostatic charge upon the components (2, 3), and at least one pair of electrodes (5, 6) for generating a separating electric field that conveys the charged components, according to their polarity, up to collectors (10, 11). The tribocharger (4) has a containment grating (14) arranged so as to retain the components in the tribocharger (4) until the components (2, 3) have reached a sufficient charge, then to allow the components, once charged, through into the gap (7), from which point the components (2, 3) reach their collector (10, 11) under the effect of the separating electric field.