Abstract:
Disclosed, is a valve apparatus for use with flotation cells. The valve apparatus is characterized in that it comprises a nozzle tube (202) for attaching to the wall (110) adjacent the orifice (102). The nozzle tube (202) is provided between the orifice (102) and the dart (100) and configured such that while in use, the dart (100) does not come into direct contact with the orifice (102) provided to the wall (100). The nozzle tube (202) further comprises an inwardly-tapered inlet (204) which extends from a wider open end to a throat (206) of smaller diameter. By virtue of the shape of the upstream-facing surface (112) of the dart (100) and the inwardly-tapered inlet (204), a nozzle structure is formed as the dart (100) moves upstream or closer to the throat (206) of the nozzle tube (202). This nozzle structure is particularly adapted for reducing head losses.
Abstract:
A centrifugal seal system for a slurry pump (1) is provided with an adjustable wear ring (2) having an outer diameter (18) that is 1.3 to 2.1, and more preferably between 1.5 and 1.9 times the inlet diameter (17) of a suction orifice (33). The adjustable wear ring (2) acts in combination with a centrifugal expeller (5) that generates a differential backpressure to seal the slurry pump (1) and prevent leakage of the fluid pumped to the surroundings. The centrifugal expeller (5) has a diameter (12) which is 75 to 95%, and more preferably, between 82% and 90% of the diameter (19) of the impeller (7). The slurry pump (1) may comprise a seal clamp (44), one or more compression packing rings (47), and an axially-floating cartridge (48) comprising one or more lip seals (46) to prevent leakage when the slurry pump (1) is stopped.
Abstract:
A comminution apparatus (1) includes a feed material directing mechanism (4) adjacent a plurality of moveable crushing bodies (3). The feed material directing mechanism (4) is configured to pre-compress feed material such as ore, limestone, clinker, or other material for directing the feed material to the crushing bodies (3) for comminution to increase the production rate for comminution operations.
Abstract:
A conveyor apparatus includes a frame (9) with upper frame segments (9e) to support and guide the upper run of a tubular belt, lower frame segments (9f) to support and guide the lower run of the tubular belt, slideable connection mechanisms (17) moveably connecting the upper frame segments (9e) to the lower frame segments (9f) and pivotal connection mechanisms (19) pivotally connecting the upper frame segments (9e) to the frame (9). Sensors are utilized to detect an operational condition of the belt indicating an undesirable alignment of the belt as the belt moves to convey material. Upon such a detected operational condition, a control mechanism automatically actuates adjustment of at least one slideable connection mechanism to adjust the position of the tubular belt in response to the detected operational condition.
Abstract:
A comminution apparatus can include a wear component. The wear component can be coupled to a wear detector so that measurements of the liner can be taken to detect a current state of wear of the liner. The detection of the worn state may occur at discrete time intervals (e.g. every day, every 30 mins, etc.). In some embodiments, the wear detector can be configured so that it is powered wirelessly via a wireless transmission of an electromagnetic field or a magnetic field that is generated by a wireless power source mechanism positioned away from a crushing body for wireless transmission of power to the wear detector. The wear detector can also be configured to wireless communicate data relating to the wear measurements to at least one remote computer device via a wireless local area network connection or other type of wireless communication connection.
Abstract:
The disclosure relates to a mine shaft conveyance safety brake for controlling the rate of deceleration of a free-falling conveyance, operating within or upon fixed shaft guides, in a vertical, substantially vertical or inclined mine shaft. The safety brake includes an activation system, one or more guide clamp assemblies operable for locking onto one or more shaft guides, one or more braking assemblies and one or more brake paths attached upon the conveyance. Upon detection of a conveyance suspension failure or slack rope condition associated with a free-falling or obstructed condition of the conveyance, the activation system is triggered, causing each guide clamp assembly to self-lock onto a shaft guide. Upon further downward travel of the conveyance, the braking assemblies travel upwardly upon the brake paths, generating increasing braking forces in a controlled manner until the conveyance comes to a controlled stop. The safety brake is purely mechanical in nature, as there are no electronics, electro-mechanical controls or hydraulic systems involved.
Abstract:
A new and improved hydrocyclone roping and wear management system and method for its use are provided. The system includes one or more wireless electronic roping sensors and/or one or more wireless electronic wear sensors disposed in communication with one or more hydrocyclones, along with a wireless electronic controller. The system is capable of wirelessly detecting roping and/or wear conditions within one or more hydrocyclone separators during their operation, communicating electronic data corresponding to the roping and/or wear conditions to an associated hydrocyclone control system, and causing adjustments in controlling operational parameters for the hydrocyclones. The associated method includes steps for wirelessly acquiring roping and/or wear condition data using the wireless electronic controller and delivering the data to the hydrocyclone control system. The system and method provide for improved roping detection and wear maintenance scheduling, and improved adjustment of undesirable roping and wear conditions.
Abstract:
This disclosure relates to systems and methods for the dissolution of metals, metallic compounds, metallic alloys, metallic solids, recyclable metal, semiconductors, and the like. Particularly disclosed, are exemplary systems, methods, and apparatus for leaching metallic solids such as blister copper, scrap copper anode, scrap copper cathode, and recycled/scrap copper. A hydrometallurgical leach process (130, 230, 730) may be provided in lieu of, or in addition to conventional electro-refining (914, 214) and fire-refining (911, 211) operations, in order to supplement and/or increase copper cathode production. Impure metallic solids are rapidly and selectively dissolved into solution via a mechano-chemical exothermic leach process, in a mechano-chemical (M-C) leach reactor. In some embodiments, impure metallic copper is rapidly and selectively dissolved into dilute sulfuric acid (e.g., 1-2 M H 2 SO 4 ); wherein the mechano-chemical dissolution process is exothermic and produces a concentrated copper sulfate electrolyte that can be used to increase existing electrorefinery output, while simultaneously eliminating the need to recycle anode scrap back to a fire refinery (911). The disclosed processes may potentially eliminate fire refining (914, 214) steps altogether, for example, by processing blister copper directly, in order to produce a copper electrolyte (113, 222, 722) for cathode (116, 225, 725) production via electrowinning.
Abstract translation:本公开涉及用于溶解金属,金属化合物,金属合金,金属固体,可回收金属,半导体等的系统和方法。 特别公开的是用于浸出金属固体例如泡铜,废铜阳极,废铜阴极和再循环/废铜的示例性系统,方法和设备。 可以提供湿法冶金浸取工艺(130,230,730)以代替传统的电解精制(914,214)和火炼(911,211)操作,或者除了常规电解精炼(914,214)和火炼(911,211)操作以补充和/或增加 铜阴极生产。 在机械化学(M-C)浸出反应器中,不纯的金属固体通过机械化学放热浸出过程快速且选择性地溶解到溶液中。 在一些实施方案中,不纯的金属铜被快速且选择性地溶解于稀硫酸(例如1-2M H 2 SO 4)中; 其中机械化学溶解过程是放热的并产生可用于增加现有电化学输出的浓硫酸铜电解质,同时消除将阳极废料循环回到火炼厂(911)的需要。 所公开的方法可以例如通过直接处理起泡铜来潜在地消除火炼(914,214)的步骤,以便生产用于阴极(116,225,725)生产的铜电解液(113,222,722) 电解。 p>
Abstract:
A vertical roller mill has grinding rollers which roll over a grinding path of a rotatable grinding table, and a surrounding nozzle ring separation area for conveying and separating gas. A coarse fraction of ground material is entrained in gas upwards in ducts from a location that is below, at, or above the nozzle ring separation area and is transported into an entry to a material separator located above the grinding table.
Abstract:
A seal for a centrifuge for preventing material from leaking out of an effluent portion into a drive portion where the seal is disposed between a basket carrier and a drive portion, and the basket carrier is disposed between the effluent portion and the drive portion. The seal can also be disposed on a stiffener, the stiffener disposed between the basket carrier and the drive portion. A sealing arrangement for a centrifuge including a contact seal and a labyrinth disc, for preventing liquid from leaking out of an effluent portion into a product discharge outlet and for preventing material from entering into the effluent portion through the product discharge outlet. Also provided is a centrifuge incorporating the seal and / or the sealing arrangement.