Abstract:
A high voltage power supply for an electrostatic precipitator comprises a high voltage transformer, a high voltage bridge rectifier and a semiconductor switch controller configured to control an output power level of the high voltage power supply. A control unit (50) is configured to determine a firing angle of firing pulses for the semiconductor switch controller. During normal operation, a peak voltage value is measured and stored in each half period. When a breakdown is detect ed, a residual voltage ( U r ) over the electrostatic precipitator is measured. A firing angle ( α 1 ) of a firing pulse to be provided to said semiconductor switch controller in the first half period after the breakdown is determined from the latest stored measured peak voltage value ( U bef ) and the measured residual voltage ( U r ) based on a predetermined relationship between the firing angle ( α 1 ) and said measured voltages.
Abstract:
Disclosed, is a retrofittable disperser apparatus [10] for a self-aspirated flotation cell. The retrofittable disperser apparatus [10] comprises a disperser assembly having a tubular portion [16C], a number of orifices [12] extending through the tubular portion [16C], and a number of blades [16A] extending radially-inwardly from the tubular portion [16C]. Also disclosed, is a self-aspirated flotation cell comprising a retrofittable disperser apparatus [10] and a method of flotation utilizing a retrofittable disperser apparatus [10] within a self-aspirated flotation cell.
Abstract:
A high voltage power supply comprises a three-phase high voltage transformer (3) and a three-phase high voltage bridge rectifier (4). A primary side of the transformer (3) has three input terminals connectable to the phases (A, B, C) of an industrial three-phase mains net, and a secondary side of the transformer (3) has three output terminals connected to three corresponding input terminals of the bridge rectifier (4). The bridge rectifier (4) is configured to supply a rectified high voltage to a load (2). The power supply further comprises a switching device (22) configured to switch between a first state, in which all input terminals of the transformer (3) are connected to corresponding phases of the net for operation in a three-phase mode, and a second state, in which at least one of the input terminals of the transformer (3) is disconnected from the net for operation in a single-phase mode.
Abstract:
A scroll screen centrifugal separator includes a distributor that is configured to receive slurry received from a feed conduit. The distributor is configured to deflect the received slurry to a screen of the scroll screen centrifugal separator. In some embodiments, the distributor may include a distributor that has a flat surface encircled by a lip or having one or more lips positioned on the flat surface, an inclined surface, or a declined surface that faces the mouth of the feed conduit. In other embodiments, the distributor may include a plurality of dam members for defining passageways through which slurry is passable through the distributor prior to being ejected to a screen of the separator. In other embodiments, the distributor may include a distributor plate that has a plurality of radial arms attached thereto that are configured to direct slurry to the basket with a rotational velocity.
Abstract:
A roller press is disclosed. The roller press [1] may comprise a pair of side-by-side rollers [22] configured to form a nip there between. The roller press [1] may further be configured to grind or crush feed material. Each of the side-by-side rollers [22] may share a first end and a second end. A pair of cheek plate assemblies [100, 200, 300, 400] may be provided to the roller press [1], wherein one cheek plate assembly [100, 200, 300, 400] is provided adjacent said first end of the rollers [22] and another cheek plate assembly [100, 200, 300, 400] is provided adjacent said second end of the rollers [22].
Abstract:
A roller press is disclosed. The roller press comprises a roller [1] having a substrate body [10], a roller edge [16] formed by the intersection of a roller end [14] and an outer surface [12]. A plurality of surface wear components [20] are provided to the roller [1], Each surface wear component [20] comprises a body [30] having a lower contact surface [31 B] configured to contact the substrate body [10], an upper surface [31A] configured to support an autogenous layer, a first wear insert aperture [36C] configured to receive a first wear insert [46], a second through bore [36B] extending from said first wear insert aperture [36C].
Abstract:
Disclosed herein are embodiments of a classifier (100) for separation of particles according to their size and/or density. The classifiers (100) disclosed herein may include a mixing chamber (120) and a separation chamber (110), where the separation chamber (110) may have a collector (118) located between two opposed plate arrays (116A, 116B).
Abstract:
A centrifuge (10) includes an inlet (22') for receiving a slurry and a basket (28) for separation of solids and liquids from the slurry. An outlet region (34) enables channelling the solids leaving the basket (28) to an outlet chute (32). The outlet region (34) includes: a first wall (36) comprising a first material and a second wall (38) comprising a second material, the second material positioned on a high wear area of the outlet region (34).
Abstract:
Described is a basket for use in a centrifuge for dewatering material, such as crude ore for use in the mineral industry, where the basket is comprised of a first portion and a second portion. The first portion is characterized in that it includes a wear member, a back member, a connection flange and a feed end flange. The first portion is detachably connected to the second portion, which is formed from a screen member, a connecting flange and a delivery end flange.
Abstract:
Described is an intake funnel (3) for a wet salt harvester (1). The intake funnel has an inlet end (4) connectable to a cutter head (5) and an outlet end (6) connectable to a pump installation (7). The intake funnel (3) comprises a middle section (8) arranged between the inlet end (4) and outlet end (6). The middle section (8) is provided with a branch pipe (9) with a valve (10) for allowing liquid to be introduced into the intake funnel (3). The intake funnel (3) is provided with a grate plate (13) located at a front end (4a) of the inlet end (4) of the intake funnel (3). The intake funnel (3) is peculiar in that the intake funnel (3) is provided with a number of inlet ports (14) for injecting pressurized liquid in the opposite direction of suction flow towards the funnel inlet grate plate (13).