A method of monitoring both liner wear and charge impact in an industrial mill uses a sensor mounted on an elongated element deployed through a shell into a liner of the mill. The elongated element wears at a same rate as the liner under conditions within the shell. Liner wear is related to a reduction in length of the elongated element as measured by travel time of an ultrasound wave, while location and strength of charge impact is related to change in amplitude of vibrations caused by the charge impact. Liner wear measurement can be improved by using shear ultrasound waves instead of conventional longitudinal ultrasound waves. A mill monitoring apparatus has a means for acquiring ultrasonic waves and audible sound waves using the same digitizer; a means for determining the angular position of the monitoring apparatus; and a means for supplying electric power to the apparatus.

A mechanochemical ball mill includes a reaction cylinder comprising a first removable end, a ball freely disposed within the reaction cylinder, and a first sensor positioned proximal to the first removable end within the reaction cylinder such that impact forces from the ball during operation of the mechanochemical ball mill can be measured.

This invention is incorporated in a system for monitoring and optimizing the operation of rotating mills in industrial mining operations. The system provides real-time feedback on the internal state of the drum, which enables operators to maximize efficiency, reduce energy consumption, and minimize downtime, leading to significant economic and environmental benefits.

A method for starting a grinding tube with an assigned drive device, wherein during the operation of the grinding tube a grinding mode and a charge release mode can be set such that a particularly reliable monitoring of the state of charge located in the grinding tube is ensured, where the grinding tube is rotated and, at a first rotational angle, a first actual torque is detected, a setpoint torque is calculated for a second, relatively large rotational angle based on the first actual torque, an actually occurring, second actual torque is detected when the second rotational angle is reached, an investigation is performed to determine the difference of the second actual torque from the setpoint torque, and the charge release mode of the grinding tube is set when the second actual torque is within the threshold range, otherwise the grinding tube is operated in the grinding mode.

One embodiment of a media handling system (5) is disclosed for mixing and or entraining grinding media (15) with a liquid media (10) for supply to a selected destination (D). In one form, the system (5) comprises a first media transfer module (30) configured operable for providing a flow of liquid media (10) having a respective flow condition to a first inlet (11) by way of which liquid media is receivable by the system (5). The system (5) comprises a second media transfer module (25) arranged in fluid communication with and downstream of both of the first inlet (11) and a second inlet (16) by way of which grinding media (15) is receivable by the system (5). The second media transfer module (25) is configured operable for supplying to the selected destination (D) a mixed flow of liquid and grinding media having a respective flow condition. In operation, one or both of the first (30) and second media transfer modules (25) are configured operable relative to the other for modifying one or both of the respective flow conditions so as to be operable or cooperable for facilitating a drawing or urging of a flow of the grinding media (15) into the system (5) via the second inlet (16) for controllably modifying a concentration of grinding media in the mixed flow of liquid and grinding media so as to converge toward and or substantially maintain a target concentration of grinding media (15) determined to be suitable for enabling supply of the mixed flow to the selected destination (D) by the second media transfer module (25).

A system for controlling an internal state of in a tumbling mill (10) having a shell (20) that rotates around an axis (60) at a speed of rotation (f.sub.ROT) for grinding a charge of material (30) by tumbling the material in the rotating shell; said shell (20) having an internal shell surface (22) including a first number (L) of protrusions (310) configured to engage material as the shell (20) rotates about the axis (60), the system comprising a status parameter extractor (450) being configured to detect occurrence of an event signature (S.sub.p(r); Sp) in a time sequence of vibration sample values (Se(i), S(j), S(q)); said status parameter extractor (450) being configured to generate data indicative of a first temporal relation (R.sub.T(r); T.sub.D; FI(r)) between said said event signature occurrence, and two other occurrences; and a regulator for controlling an angular toe position (FI(r), A.sub.TOE) based on a toe position reference value (FI.sub.REF(r)), said first temporal relation (Rr(r); T.sub.D; FI(r)), and a toe position error value (FI.sub.ERR(r)).

Monitoring equipment for monitoring the performance of systems for crushing solid materials are disclosed. The working condition of an elastic liner material is diagnosed and load parameters are analyzed. Integrated into the liner material is a measuring means in the form of a monitoring sensor which works by measuring the axisymmetric bending of the elastic liner material in response to a known force. The data recorded is then sent to an information system for analytical processing. This includes detecting wear and monitoring whether a critical thickness of the liner material has been reached. A housing element (3), a movable sensing element (4) structurally adapted to be continuously thrust in the direction of the wearing surface of the liner material by a resilient pressuring means (5), and a transmitting element (6) are disclosed. The movable sensing element (4) records the magnitude of axisymmetric bending of the liner material and transmits this data to the transmitting element (6), thus providing for a resource-efficient operating regime that makes it possible to use the wearing liner material until critical wear indices are reached.

A method can include milling a powder with a test grinding media, and determining an amount of abraded grinding media that abrades from the test grinding media into the powder due to the milling of the powder. The method can include creating a compensated powder to account for the amount of the abraded grinding media such that the powder milling process results in a desired powder composition.

Disclosed is a nano-sand mill with static discharge at the tail end of a turbine, including a main body and a screen box. The screen box is fixedly installed at a bottom of the main body, a top surface of the screen box is provided with a through hole, the screen box is communicated with a discharge chamber of the main body through the through hole, an annular mounting plate is fixedly installed on an inner side surface of the screen box, a screen is fixedly installed between inner side surfaces of the annular mounting plate, and a dredging mechanism is provided inside the annular mounting plate. Through the dredging mechanism, a plurality of dredging marbles can continuously strike the screen to quickly dredge the screen, shaking out materials blocked on the screen, and the surfaces of the dredging marbles grind materials blocked on the lower surface of the screen.

One embodiment of a media handling system (5) is disclosed for mixing and or entraining grinding media (15) with a liquid media (10) for supply to a selected destination (D). In one form, the system (5) comprises a first media transfer module (30) configured operable for providing a flow of liquid media (10) having a respective flow condition to a first inlet (11) by way of which liquid media is receivable by the system (5). The system (5) comprises a second media transfer module (25) arranged in fluid communication with and downstream of both of the first inlet (11) and a second inlet (16) by way of which grinding media (15) is receivable by the system (5). The second media transfer module (25) is configured operable for supplying to the selected destination (D) a mixed flow of liquid and grinding media having a respective flow condition. In operation, one or both of the first (30) and second media transfer modules (25) are configured operable relative to the other for modifying one or both of the respective flow conditions so as to be operable or cooperable for facilitating a drawing or urging of a flow of the grinding media (15) into the system (5) via the second inlet (16) for controllably modifying a concentration of grinding media in the mixed flow of liquid and grinding media so as to converge toward and or substantially maintain a target concentration of grinding media (15) determined to be suitable for enabling supply of the mixed flow to the selected destination (D) by the second media transfer module (25).