A solid material grinding method and device with an adjustable discharge size includes a grinding disc housing, and a movable grinding disc and a stationary grinding disc provided in a grinding disc cavity of the grinding disc housing coaxially with grinding surfaces opposite to each other. The movable grinding disc is driven to rotate in the grinding disc housing, thereby grinding materials between the movable grinding disc and the stationary grinding disc. The movable grinding disc is further connected to a pushing mechanism, and the pushing mechanism adjusts the distance between the movable grinding disc and the stationary grinding disc in a push-and-pull manner. A top rectifying blower and a side edge rectifying blower respectively blow gas from an upward side and a lateral side of the movable grinding disc and the stationary grinding disc. A central rectifying blower blows gas to the center of the stationary grinding disc.

A device for treating a web of fibrous material, the device comprising: a sensor for detecting vibrations; a multi-part housing including a cover; and a plurality of fiber treatment tools arranged inside the multi-part housing, the plurality of fiber treatment tools including a plurality of treatment profiles facing one another, being arranged spaced apart from each other so as to form at least one treatment gap with the plurality of treatment profiles, and being mounted rotatably relative to one another, at least one of the plurality of fiber treatment tools being mounted axially movable in the multi-part housing so as to be configured for adjusting a width of the at least one treatment gap between the plurality of treatment profiles facing each other, at least one of the plurality of fiber treatment tools being supported by a part of the multi-part housing, the sensor being arranged on the multi-part housing.

A device for treating a web of fibrous material, the device comprising: a sensor for detecting vibrations; a multi-part housing including a cover; and a plurality of fiber treatment tools arranged inside the multi-part housing, the plurality of fiber treatment tools including a plurality of treatment profiles facing one another, being arranged spaced apart from each other so as to form at least one treatment gap with the plurality of treatment profiles, and being mounted rotatably relative to one another, at least one of the plurality of fiber treatment tools being mounted axially movable in the multi-part housing so as to be configured for adjusting a width of the at least one treatment gap between the plurality of treatment profiles facing each other, at least one of the plurality of fiber treatment tools being supported by a part of the multi-part housing, the sensor being arranged on the multi-part housing.

The present disclosure relates to a method of monitoring a width (w) of a gap (1) between two grinding discs (2) in a grinding device (10) for processing a fibrous fluid (6). The method comprises rotating a first disc of the grinding discs relative to a second disc of the grinding discs, about a rotational axis of the first disc. The method also comprises obtaining a frequency spectrum of mechanical vibrations in the grinding device caused by the rotating of the first disc relative to the second disc. The method also comprises, within a predetermined frequency range of the obtained frequency spectrum, determining a prevalence of vibration peaks, said prevalence being an indication of the gap width.

The present disclosure relates to a method of monitoring a width (w) of a gap (1) between two grinding discs (2) in a grinding device (10) for processing a fibrous fluid (6). The method comprises rotating a first disc of the grinding discs relative to a second disc of the grinding discs, about a rotational axis of the first disc. The method also comprises obtaining a frequency spectrum of mechanical vibrations in the grinding device caused by the rotating of the first disc relative to the second disc. The method also comprises, within a predetermined frequency range of the obtained frequency spectrum, determining a prevalence of vibration peaks, said prevalence being an indication of the gap width.

A mineral liberation machine comprising vertical wet grinding mill (10) for grinding coarse material comprising a cylindrical housing (14) containing a rotatable shaft (15) creating an annular channel (17) with an input feed (16) for supplying coarse material and an output feed (18) for withdrawing ground product, in which the rotatable shaft (15) is equipped with a plurality of rotor discs (20) and the cylindrical housing (14) is equipped with one or more stators or stator discs (22), the discs (20, 22) on the rotatable shaft (15) and cylindrical housing (14) are interleaved such that the ratio of the height of the housing (14) to the diameter of the housing (14) is low with the diameter to height ratio being between 0.6-1.2.

A measurement system for monitoring a gap adjustment mechanism of a processing device which has oppositely positioned processing elements with a gap between them. The measurement system has a first measuring device to measure information describing a position of that processing element which is moved by at least one actuating unit of the gap adjustment mechanism for adjusting the size of the gap, and at least one second measuring device to measure information describing a position of the at least one actuating unit. The measurement system has a data processing device configurable to determine the condition of the gap adjustment mechanism based on the information describing the position of the processing element and the information describing the position of the at least one actuating unit. Additionally, a method for monitoring a condition of a gap adjustment mechanism of a processing device.

A measurement system for monitoring a gap adjustment mechanism of a processing device which has oppositely positioned processing elements with a gap between them. The measurement system has a first measuring device to measure information describing a position of that processing element which is moved by at least one actuating unit of the gap adjustment mechanism for adjusting the size of the gap, and at least one second measuring device to measure information describing a position of the at least one actuating unit. The measurement system has a data processing device configurable to determine the condition of the gap adjustment mechanism based on the information describing the position of the processing element and the information describing the position of the at least one actuating unit. Additionally, a method for monitoring a condition of a gap adjustment mechanism of a processing device.