Abstract:
Disclosed are novel compounds which display enhanced reactive properties due, in part, to induced lattice strain. The new compounds demonstrate accelerated leaching of copper under oxidizing conditions. The activated compounds are produced under conditions of time, temperature, Eh, and pH which retard the rate of lattice strain relaxation. Further disclosed are methods of making and using the novel compounds.
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 therebetween. 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]. Each cheek plate assembly [100, 200, 300, 400] may be configured for engagement with a frame [30] and/or housing [40] portion of the roller press [1]. Cheek plate assemblies [100, 200, 300, 400] may further comprise at least one wear bar [110, 210, 310, 410], wherein the at least one wear bar [110, 210, 310, 410] is configured with a wear surface [118, 218, 318, 418] which is located proximate to a wear zone 180. As the wear bar [110, 210, 310, 410] wears, it may be adjusted via indexing means [126, 226, 326] and held in place via holding means [125, 225, 325, 425].
Abstract:
A system for the continuous monitoring of wear is disclosed. The system comprises a grinding mill (100) having at least one grinding disc (106). At least one detector (141) is provided to the at least one grinding disc (106), and at least one sensor (120) is provided to the grinding mill (100) which is configured to communicate with the at least one detector (141) during operation of the grinding mill (100). In use, the at least one grinding disc (106) wears away and ultimately affects a function of the least one detector (141). The at least one sensor (120) is configured to monitor said function of the least one detector (141). When the at least one sensor (120) detects a change in the signal of the at least one detector (141), an operator is notified that maintenance or grinding disc replacement may be necessary.
Abstract:
Disclosed herein are embodiments of a classifier (100) for classification of particles according to their size and/or weight. Classifiers (100) disclosed herein may include a mixing chamber (120), and a separation chamber (110), where the separation chamber may be separable into parts. Classifiers (100) disclosed herein may include a fluidizing chamber (130). The separation chamber (110) may include a de-aeration chamber (151) and a launder (117).
Abstract:
A filter plate assembly [1] comprises a filter plate [100] having a recess [102], a radially-inwardly extending shelf portion [108] having a seat surface [101], and a feed eye aperture [110] extending through the shelf portion. An adapter ring [170] is placed within said recess [102]. The adapter ring [170] has a flange [172] and a barrel [179] extending from the flange [172]. The barrel [179] has an inner wall [180] and an outer wall [182], and is positioned within said aperture [110] such that the outer wall [182] of the barrel [179] is in close proximity with said aperture [110]. The flange [172] comprises an inner surface [173] which abuts the seat surface [101]. The filter plate assembly [1] further comprises a filter cloth assembly [160] comprising a filter cloth [168] having an aperture [168B], and a grommet [168A] fitted within the filter cloth aperture [168B]. The grommet [168A] is configured to align with the adapter ring [170], and comprises a collar [167] having an inner surface [167A] which is bonded or mechanically attached to a first side [188] of the filter cloth [168]. A second side [189] of the filter cloth [168] abuts a sealing surface [185] of the adapter ring [170].
Abstract:
Disclosed, is a drive (101) for a sedimentation tank (1000) comprising a main ring gear (160) operatively connected to a cage (150) via a web portion (152). A bearing transfer ring (170) is provided to the web portion (152) such that a gap (172) is provided between the bearing transfer ring (170) and the main ring gear (160). The bearing transfer ring (170) is connected to a first bearing race (144) which communicates with a second bearing race (142) that is fastened to a base portion (136) of the drive (101). Torque (T) is delivered to the cage (150) to turn a rake assembly (1002). The gap (172) provides clearance for deflections, distortions, or deformations of the main ring gear (160) caused by bending stresses (B) in the main ring gear (160) may. The bearing transfer ring (170) absorbs stresses imparted to the main ring gear (160) and prevents fasteners (188) connected to stiff bearing races (144) from shearing. Also disclosed is a retrofit kit for a sedimentation tank drive, a sedimentation tank (1000) having a drive (101) according to the above description, and a method of thickening/clarifying slurry (1008) utilizing a drive (101) according to the above description.
Abstract:
A method of leaching a copper bearing sulfide mineral slurry containing chalcopyrite is described. The method comprises the steps of providing a slurry having chalcopyrite particles therein, exposing the slurry to an acidic leach solution, and chemically leaching copper from the slurry into the acidic leach solution in the presence of microwave irradiation. The microwave irradiation of the slurry takes place under process conditions whereby crystalline pyrite may be formed in-situ on surfaces of the chalcopyrite particles. Crystalline pyrite may be formed on surfaces of the chalcopyrite particles from amorphous phase pyrite. Leached copper is recovered from said acidic leach solution. A device for more efficiently leaching a copper bearing sulfide mineral slurry containing chalcopyrite is also described herein.
Abstract:
A roller press having an improved edge wear assembly is disclosed. The roller press comprises a roller [200] having an axis [203]. The roller [200] comprises an outer surface [205] containing one or more wear inserts [280] and an annular abutment surface [207] proximate an end of the outer surface [205]. The annular abutment surface [207] extends generally transversely with respect to the outer surface [205] of the roller [200]. A plurality of wear components [211] extend from the abutment surface [207] in a direction generally parallel to the axis [203] of the roller [200], wherein at least two of the wear components [211] are circumferentially interlocked with one another so as to resist axial and/or radial pull-off forces as material flows between other wear inserts [280] located on the roller [200]. Fasteners [230] are received by receiving portions [215] in and secure the wear components [211] to the abutment surface [207] of the roller [200].
Abstract:
A roller press comprises a roller [100] having: a roller edge [110] formed by the intersection of a roller end [126] and an outer surface [128], an edge wear component [150] provided at said roller edge [110], and a mounting insert [160] provided within a mounting insert pocket [129] located inland of said roller end [126] and spaced from said roller edge [110]. A fastener [140] extends between the edge wear component [150] and the mounting insert [160] to keep the edge wear component [150] attached to the roller [100]. The fastener [140] threadedly engages female threads [164] provided within the mounting insert [160]. Also disclosed, is an edge protection system and method of mounting an edge wear component [150] to a roller [100] in a roller press.
Abstract:
A flotation machine includes a wash water system that is connectable adjacent a tank to direct sprays of water into froth within a froth zone. Wash water panel assemblies of the system can be positioned adjacent the tank so that each of the wash water panel assemblies are moveable between an open position and a closed position. Each wash water panel assembly can include an outer panel body that at least partially defines a reservoir in which wash water is passable and a spray membrane positionable adjacent the outer panel body. The spray membrane can have a plurality of spray holes in fluid communication with the reservoir such that water is passable from the reservoir and through the spray membrane via the spray holes for spraying water into the froth in the froth zone.