A distribution metering device (I) for a roller mill which includes a housing (2) with at least one grinding stock inlet (3), at least one grinding stock outlet (4), and a feed roll (5) which is arranged in the housing (2) for metering grinding stock into a grinding gap of the roller mill through the grinding stock outlet (4). The feed roll is rotatable about a feed roll axis (SA). A conveyor shaft (6) is arranged in the housing (2) for distributing grinding stock along the feed roll (5). The conveyor shaft is rotatable about a conveyor shaft axis (FA). The conveyor shaft axis (FA) is substantially parallel to the feed roll axis (SA), and a first fill state sensor (7) is arranged in the housing (2) for ascertaining a first grinding stock fill state of the housing (2).

A control method of a treatment plant for elements to be recycled or disposed of, which includes a crushing roll adapted to reduce the size of the elements to be recycled or disposed of, a screen operatively arranged upstream of the crushing roll and adapted to enable passage therethrough only of elements to be recycled or disposed of having a size larger than a predetermined size, and a conveyor belt arranged operationally upstream of the screen to provide the screen with the elements to be recycled or disposed of, includes a measuring step of the volume of material lying on the conveyor belt; a comparing step of the measured volume value to a first predetermined value; and an increasing step of the vibration intensity of the screen if the measured volume value exceeds the first predetermined value.

Roller packages (IO) for grinding devices (70), comprising a first roller (II), which is maintained by at least one first bearing body (13), and a second roller (12), which is maintained by at least one second bearing body (14). The first bearing body (13) and the second bearing body (14) are prestressed against each other and comprise stop elements (17, 19) with stop surfaces (18, 20), the contact of which counteracts a contact of the rollers (II, 12). The rotational position of the first stop element (17) determines the minimum width of the grinding gap. Also disclosed are grinding devices (70), methods for operating a roller group (IO) and methods for determining the radial force acting between the rollers (II, 12) of a roller group (IO).

A measuring device for ascertaining the temperature of a roller surface of a roller body is insertable into a recess of the roller body and includes at least first and second temperature sensors, a mounting rod on which the sensors are situated in the axial direction of the mounting rod spaced apart from each another, and, on each side of each respective one of the temperature sensor in the axial direction a respective supporting element arranged on the mounting rod. Between the supporting elements, the mounting rod is flexible such that each of the temperature sensors is able to be pressed onto an inner wall of the recess with a defined contact force.

An intake arrangement (1) for a roller mill which includes a storage container (2), a force transducer (6) arranged on the storage container (2), a level sensor (7) arranged on the storage container (2) for determining when a ground material level (B) is reached in the storage container (2), and a control unit (8). The control unit (8) is designed to determine a first fill level (A) of the storage container (2), from a weight force (EG) determined by the force transducer (6), and to determine a characteristic fill level curve (K), based on the determined first fill level (A) and the fill level (B) determined by the level sensor (7).

A control method of a treatment plant for elements to be recycled or disposed of, having a crushing roll to reduce the size of the elements to be recycled or disposed of, and a screen operatively arranged upstream of the crushing roll to enable passage therethrough only of elements having a size larger than a predetermined size, includes the steps of measuring the current absorbed by the crushing roll; comparing the measured current value to a first predetermined value; and reducing the vibrations of the screen, if the measured current exceeds the first predetermined value.

Roller packages (IO) for grinding devices (70), comprising a first roller (II), which is maintained by at least one first bearing body (13), and a second roller (12), which is maintained by at least one second bearing body (14). The first bearing body (13) and the second bearing body (14) are prestressed against each other and comprise stop elements (17, 19) with stop surfaces (18, 20), the contact of which counteracts a contact of the rollers (II, 12). The rotational position of the first stop element (17) determines the minimum width of the grinding gap. Also disclosed are grinding devices (70), methods for operating a roller group (IO) and methods for determining the radial force acting between the rollers (II, 12) of a roller group (IO).

The invention relates to a test arrangement for testing breakage and mechanical properties of rock particles. Test arrangement comprises: a support (1, 2); two counter-rotatable crushing wheels (3, 3′) supported on the sup-port (1, 2); and a drive arrangement (M1, M2) for rotating the crushing wheels (3, 3′), said crushing wheels (3, 3′) facing each other and defining therebetween an in-put gap (G) for the rock particles, said wheels being arranged to break the rock particles (RP) to smaller daughter particles (DP), wherein the test arrangement is arranged to receive only one rock particle at a time to be inputted to the input gap for breakage testing, an energy measurement arrangement (5, 5′) arranged to measure in-formation relating to energy absorbed by the rock particles (RP) during the breakage, a processor (PR) coupled to the energy measurement arrangement and arranged to receive, as inputs, at least one degree of breakage of the rock particles as a result of the breakage and the corresponding breakage energies absorbed by the rock particles (RP) during the breakage, to determine a correlation between the degree of breakage and the breakage energies, and to output the correlation.

System and method for controlling the startup sequence of a roller crusher is disclosed. The roller crusher includes two generally parallel rollers that are separated by a gap where the rollers rotate in an opposite direction. During startup, the gap between the rollers is greater than the gap during normal production and a feeding arrangement is run at a speed that is lower than a normal production feed rate. The rollers are rotated at a predetermined speed that is less than the speed during normal production. Other parameters of the system are set such that material is fed over the entire length of the rollers and the no crushing force is exerted during the startup. The method and system of the present disclosure reduces the amount of stress on the rolls, frame and hydraulic system of the roller crusher.

A system for removing biomass from a stem includes a frame, a conveyor mechanism which moves the stem in a horizontal conveying direction, a pair of rollers which exert a rubbing force between each other for removing the biomass from the stem, and a tensioning system arranged to exert a force which holds the stem to the conveyor mechanism. A first axial end of each roller is connected to an inlet end side of the conveyor mechanism, and a second axial end of each roller is connected to a transmission such that the rollers are angled downward from the first axial ends to the second axial ends. The conveyor mechanism moves the stem so as to pass between the rollers such that the rubbing force removes the biomass from the stem, and such that the rubbing force moves downward along the stem as the stem moves in the conveying direction.