Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C4/00—Crushing or disintegrating by roller mills
  • B02C4/28—Details
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C4/00—Crushing or disintegrating by roller mills
  • B02C4/28—Details
  • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C4/00—Crushing or disintegrating by roller mills
  • B02C4/28—Details
  • B02C4/42—Driving mechanisms; Roller speed control
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
  • B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C2210/00—Codes relating to different types of disintegrating devices
  • B02C2210/01—Indication of wear on beaters, knives, rollers, anvils, linings and the like

Definitions

• the invention relates to a method for operating a system with at least one unit, which has a rotating surface, which wears increasingly during operation of the system, wherein the state of wear of the rotating surface is determined and evaluated.
• the aggregate is in particular a grinding roller, as used for example in a roller press.
• these may also be, for example, races of circumferentially mounted cylinders, such as roller mills or rotary kilns.
• cylindrical cylindrical carbide pins are very often used in practice, which are introduced into a soft matrix and form an autogenous wear protection layer with the millbase.
• Such roll mills are used in the grinding of limestone, dolomite or other brittle materials, such as in the processing of ore.
• CONFIRMATION COPY Roll basic body which is equipped with a plurality of profiled bodies. Furthermore, a monitoring device is provided which checks the state of wear of the plurality of profile body and detects any wear early. From this, a wear prognosis of the roll surface is derived so that the next reprocessing can be planned in good time so that unnecessary downtimes are avoided.
• the invention is based on the object of a method for operating a system with at least one unit, which has a rotating surface, which wears during operation of the system increasingly wear indicate, which allows a more economical operation of the system.
• the object is achieved in that the state of wear of the rotating surface is determined and evaluated, depending on the state of wear of the rotating surface is given a trade instruction for a modified, adapted to the determined state of wear of the rotating surface further operation of the system.
• the present invention takes a different approach by adapting the further mode of operation of the unit to the state of wear. While this may not allow the unit to run at its original capacity, it will, in many cases, be more economical, the unit to drive with reduced power, as an alternative to allow another too fast wear, which then leads to premature shutdown of the plant.
• the present invention enables a continuous overall optimization of the crushing system, in which the wear progress is continuously included in the optimization of the overall process as a parameter.
• the state of wear during operation of the system is determined. If the unit is serviced or repaired at predetermined intervals, it is provided according to a further embodiment of the invention that the further operating mode of the installation adapted to the determined state of wear of the rotating surface is set so that the remaining running time of the unit remains until the scheduled period of maintenance or repair is adjusted. This is particularly useful especially when premature repair or maintenance is not possible and premature wear of the surface would result in a prolonged downtime of the unit.
• the present invention takes into account the knowledge that the speed at which the rotating surface wears depends on the operation of the system.
• the plant is used for the comminution of lumpy material, wherein it may be in the at least one unit in particular a grinding roller.
• the plant can be operated as a roller press with two designed as grinding rollers units.
• the further mode of operation of the system which is adapted to the determined state of wear of the rotating surface can in particular consist of a change in the rotational speed of the rotating surface.
• the system consists of at least one grinding roller and optionally has an upstream screening stage and / or crushing stage for the pretreatment of shredding material and possibly an upstream bunker for intermediate storage of the material to be shredded and optionally a pressing device on
• the adapted further operation of the system can be carried out by one or more of the following process steps:
• Fig. 1 is a side view of a roller press with
• FIG. 1 is a plan view of the roller press of FIG. 1,
• Fig. 5 is a schematic representation of a system with a roller press and a Vorbunker for intermediate storage of the shredded
• FIGS. 1 and 2 In the darg Robinson in FIGS. 1 and 2 plant for crushing lumpy material, such as limestone or ore, it is a roller press with two trained as grinding rollers units 1 and 2, in a known per se with a pressing device 3 are pressed against each other. Via spacers 4, a predetermined grinding gap 5 is maintained.
• the two units 1, 2 and the pressing device 3 are arranged for this purpose in a machine frame comprising a base frame 6, pressure bar 7 and upper straps 8.
• the pressing device 3 has a hydropneumatic adjusting element 9, which is operated with gas and oil and is acted upon to produce the grinding pressure accordingly.
• the two formed as grinding rollers units 1, 2 are driven in opposite directions by not shown drives, wherein the comminuted, particulate material is fed to the grinding gap 5.
• the units 1, 2 have rotating surfaces (peripheral surfaces la, 2a), which are usually provided with a suitable anti-wear layer.
• This wear protection layer can for example be composed of full-surface applied wear protection segments.
• Fig. 3a shows the state of an unworn aggregate.
• FIGS. 3b, 3c and 3d different wear profiles are shown, wherein the aggregate according to FIG. 3b is partially worn, in FIG. 3c it is worn in a contoured manner and in FIG. 3d the roller surface has partially broken away
• the monitoring devices 10, 11 are preferably designed so that they can carry out monitoring of the rotating surfaces 1a, 2a during the grinding operation. In this way, the increasing wear can be detected in time, so that the operation of the system can be adapted to the determined state of wear. If the repair and maintenance of the units 1 and 2 at predetermined intervals, the operation of the roller press to the determined state of wear of the rotating surfaces 1 a and 2 a is adjusted so that the system can be operated until the scheduled maintenance and repair interval time. Under certain circumstances, this can lead to a slightly reduced throughput of the roller press due to the changed operating mode. Without adjustment, the operation may need to be stopped prematurely, resulting in a lower overall throughput.
• a more economical mode of operation of the system results from the fact that the operation of the system is adapted to the state of wear of the rotating surface.
• a change in the rotational speed of the grinding rollers and an adaptation of the grinding pressure by the pressing device come into consideration as measures.
• the adjustment of the grinding pressure can be realized in particular by a change in the ratio of gas pressure to oil pressure in the hydropneumatic adjustment accordingly 9.
• a pre-bunker 101 for intermediate storage of the material to be comminuted in addition to the roll press 100, a pre-bunker 101 for intermediate storage of the material to be comminuted, a screening stage 102 and a crushing stage 103 for pre-treatment of the material 104 to be comminuted are provided.
• the intermediately stored in Vorbunker 101, to be crushed material 104 first passes into the screening stage 102, wherein the fine fraction passes directly into a feed slot 105 of the roller press 100 and the coarse material on the crushing stage 103 there.
• the wear rate of the grinding rolls of the roll press 100 depends inter alia on the grain size or grain composition of the material to be shredded. Displacement of a portion of the crushing work of roller press 100 to crushing stage 103 therefore has a direct impact on the speed at which the rotating surface of the aggregates of the roller mill wears.
• FIG. 5 shows a plant in which material 4 to be comminuted passes directly from a pre-bunker 101 to the roller press 100 without it having previously passed through a screening or crushing stage.
• the flow of material from the Vorbunker 101 is influenced by the position of sliders 106.
• the amount of the roller press 100 supplied material is regulated accordingly.
• An increased wear on the rotating surface la, 2a of the grinding rollers can be caused by a too low mass flow of the material to be crushed, as in this case instead of a comminution comminution increasingly takes place a single grain size reduction.
• An increase in the mass flow through a corresponding position of the slide 106 can therefore bring about an improvement.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Mechanical Engineering (AREA)
• Crushing And Grinding (AREA)
• Mechanical Control Devices (AREA)
• Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
• Harvester Elements (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=51662042

Family Applications (1)

Country Status (13)

Families Citing this family (16)

Family Cites Families (48)

• 2013
  • 2013-10-02 DE DE102013110981.0A patent/DE102013110981A1/de not_active Ceased
• 2014
  • 2014-09-29 PE PE2016000437A patent/PE20161087A1/es unknown
  • 2014-09-29 MX MX2016004048A patent/MX368561B/es active IP Right Grant
  • 2014-09-29 WO PCT/EP2014/002635 patent/WO2015049043A1/fr not_active Ceased
  • 2014-09-29 DK DK14781063.4T patent/DK3052239T3/da active
  • 2014-09-29 AU AU2014331405A patent/AU2014331405B2/en active Active
  • 2014-09-29 BR BR112016007229-4A patent/BR112016007229B1/pt active IP Right Grant
  • 2014-09-29 US US15/026,351 patent/US10556239B2/en active Active
  • 2014-09-29 CN CN201480054326.0A patent/CN105592926B/zh active Active
  • 2014-09-29 CA CA2924968A patent/CA2924968C/fr active Active
  • 2014-09-29 EA EA201690440A patent/EA032792B1/ru not_active IP Right Cessation
  • 2014-09-29 EP EP14781063.4A patent/EP3052239B1/fr active Active
• 2016
  • 2016-03-29 ZA ZA2016/02072A patent/ZA201602072B/en unknown

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