摘要:
A cobalt coincidence radioactivity detector is used to separate radioactive concrete dust from uncontaminated dust resulting from dismantling a nuclear power plant. A suction air stream carries the dust through a vacuum line to a cyclone segregator. The dust falls into a smaller first container from the segregator, and the detector detects radioactivity in the filled first container. The dust is transferred from the first container to a second container if the detected radioactivity exceeds a predetermined threshold. The dust is transferred from the first container to a third container if the detected radioactivity does not exceed the predetermined threshold. A filter collects the dust carried past the segregator by the suction air stream. If the radioactivity detected in the dust that collects on the filter exceeds the predetermined threshold, the dust in the first container is transferred to the second container before the first container is allowed to fill.
摘要:
A disc for releasable attachment to a shaft of a disc screen apparatus includes a hub having a bore and a single split defining a pair of opposing ends. The hub also has at least one flexible portion intermediate the opposing ends that permits the opposing ends of the hub to be separated a predetermined distance sufficient to allow the shaft of the disc screen apparatus to pass between the opposing ends into the bore. The hub has plurality of outer impacting portions configured for engaging materials to be classified and propelling the materials in a conveying direction when the hub is rotated. A mechanism is provided to secure the hub to the shaft so that the shaft extends through the bore.
摘要:
A vibratory separator having a resiliently mounted housing with a vibratory drive. A screen extends across the housing and a cover is positionable over the screen. The screen includes a discharge port therethrough aligned with a discharge passage for removing material from the top of the screen from the system. Another discharge passage cooperates with a manifold plate extending across the separator beneath the screen. An access port is provided through the cover and arranged to receive a discharge plug which can selectively close the discharge hole through the screen. In operation, separating or dewatering is first accomplished, the energy level of the vibration is reduced and a vacuum is drawn above the screen. Bleed air is allowed into the separator below the screen with a restricted flow so that a vacuum can be drawn. Once the material has dried, the vibrational energy can be increased and the plug removed from the hole through the screen. The process material may then be discharged from the unit.
摘要:
A roller conveyor or conveyor-classifier assembly is disclosed which comprises a plurality of rollers (16), a corresponding bearing support block (18) for each end of each of the rollers (16), with each block (18) being of upper case "H" configuration in transverse cross section to define an upper and lower groove (18U and 18L in FIG. 6), and including frame (25) for supporting the blocks (18). The frame assembly (25) comprises oppositely disposed rails (22A, 24A) each having a track (22B, 24B), respectively, adapted to slidably project into oppositely disposed grooves (18U, 18L) in bearing support blocks (18). Shims (36) which are lower "h" configuration in transverse cross section, are insertable from the outboard sides of the frame assemblies (25) and are interposed between adjacent bearing support blocks (18) with the lower portion (36A, 36B) of the "h" configuration being adapted to interlockingly straddle the upwardly projecting lower track (24B) for retention in position to provide a predetermined spacing between the adjacent bearing support blocks (18), and thus, to provide a predetermined clearance or spacing between adjacent rollers (16) supported by the adjacent bearing support blocks (18).
摘要:
The present invention relates to a method of selective separation of a granular material comprising a fraction of coarse particles and a fraction of fine particles for separating said fraction of coarse particles from said fraction of fine particles.
摘要:
A cobalt coincidence radioactivity detector is used to separate radioactive concrete dust from uncontaminated dust resulting from dismantling a nuclear power plant. A suction air stream carries the dust through a vacuum line to a cyclone segregator. The dust falls into a smaller first container from the segregator, and the detector detects radioactivity in the filled first container. The dust is transferred from the first container to a second container if the detected radioactivity exceeds a predetermined threshold. The dust is transferred from the first container to a third container if the detected radioactivity does not exceed the predetermined threshold. A filter collects the dust carried past the segregator by the suction air stream. If the radioactivity detected in the dust that collects on the filter exceeds the predetermined threshold, the dust in the first container is transferred to the second container before the first container is allowed to fill.
摘要:
The present invention provides methods and systems for reducing moisture in mineral slurries, particularly mineral slurries containing minerals of small particle diameter, using a granular drying material. The invention also relates to novel mineral products and intermediates useful in connection with the process. The method and system reduced moisture by contacting the mineral slurry with the granular drying material. The granular drying material is selected to be readily separated from the dried minerals using a size separation technique such as a sieve screen. The granular drying material is the regenerated, preferably using a process involving heat exchange and cross-flow air. The granular drying material is preferably capable of regeneration and recycling in a continuous process with minimal attrition.
摘要:
A grain sorter including a machine frame, at least one grain sorting board and a device for moving the grain sorting board in swinging movement including a mounting mechanism for mounting the grain sorting board on the machine frame in such a manner that the grain sorting board is inclined in one direction at a certain angle of inclination with respect to the horizontal, a swinging mechanism for moving the grain sorting board in swinging movement at an angle larger than the angle of inclination of the grain sorting board, and an adjusting mechanism for adjusting the angle of inclination of the grain sorting board. The mechanism for adjusting the angle of inclination of the grain sorting board is incorporated in the device for moving the grain sorting board in swinging movement within the limit set by the heights of the mounting mechanism and the swinging mechanism, so as to lower the center of gravity of the grain sorting board and avoid production of irregular vibration of the grain sorting board.