EP3866978A1 - Broyeur pour le broyage de matériaux ayant des duretés et des granulométries différentes - Google Patents

Broyeur pour le broyage de matériaux ayant des duretés et des granulométries différentes

Info

Publication number
EP3866978A1
EP3866978A1 EP19748645.9A EP19748645A EP3866978A1 EP 3866978 A1 EP3866978 A1 EP 3866978A1 EP 19748645 A EP19748645 A EP 19748645A EP 3866978 A1 EP3866978 A1 EP 3866978A1
Authority
EP
European Patent Office
Prior art keywords
grinding
mill
runners
materials
runner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19748645.9A
Other languages
German (de)
English (en)
Other versions
EP3866978B1 (fr
Inventor
Ivan Kosina
Jan PAVLÍK
Michal BURGET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSP Engineering AS
Original Assignee
PSP Engineering AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PSP Engineering AS filed Critical PSP Engineering AS
Publication of EP3866978A1 publication Critical patent/EP3866978A1/fr
Application granted granted Critical
Publication of EP3866978B1 publication Critical patent/EP3866978B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/02Crushing or disintegrating by roller mills with two or more rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/28Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/28Details
    • B02C4/30Shape or construction of rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/28Details
    • B02C4/32Adjusting, applying pressure to, or controlling the distance between, milling members

Definitions

  • the invention relates to a mill for grinding of materials of different hardness and grain size, such as, for example, materials for production of cement, cement clinker, lime, limestone, ore and pigments, and similar materials.
  • Tube-ball mills and/or vertical disc mills have been used so far to grind the above-mentioned materials of different hardness and grain size.
  • Major disadvantage of tube-ball mills is, however, an asymmetrical process of grinding caused by an indefinable contact between grinding charge and mill armoring, resulting in low energy efficiency of grinding.
  • Existing vertical disc mills also report low grinding efficiency, which may only be improved by repeated supply of ground stock under the grinding disc. Considerable dimensions and weight of said mills are other disadvantages, making their operation energy-demanding with the present long period of grinding.
  • High-pressure roller presses comprising two rollers pressed to one another by great force, whereas grinding is completed after one pass of the material between said rollers, are also used for grinding of said materials.
  • Disadvantage of high- pressure roller presses lies in their high thrust, giving rise to massive wear-and-tear of grinding rollers and other components of presses.
  • considerable force conditions demand a robust structure of the entire equipment, thus increasing manufacturing costs.
  • “Medium-Pressure Multi-Roller Press for Grinding of Grained Materials” is known from the CZ patent No. 292 489, comprising one driven roller and at least two grinding rollers, not fitted with their own drives, whereas their axes are parallel to axis of said driven roller.
  • Grinding roller diameter equals, as maximum, to half the diameter of said driven roller and grinding rollers are mechanically seated in a manner that rest gaps, whose height decreases in the direction of rotation of said driven roller, are created between surface of each roller and near surface of said driven roller.
  • Each grinding roller is equipped with devices providing their thrust directed to the driven roller. Longitudinal axes of grinding rollers are on the planes passing through the axis of said driven roller and are diverted from the vertical plane, spaced by the axis of said driven roller, by gradually increasing angles a, b, g.
  • the mill for grinding of materials of different hardness and grain size eliminates mentioned weaknesses;
  • the mill comprises drives and a body of the mill, equipped with a hopper and a discharging hopper, housing, in a rotating manner seated, a main grinding roller driven by a main drive, equipped with a replaceable abrasion-resistant tire and from both sides fitted with guide rings along the circumference, overlapping its diameter, arranged in a manner to prevent ground stock leakage from a grinding slot.
  • At least three smaller grinding runners are incorporated in the body of the mill, in a rotating and sliding manner, whose axes are in parallel to the axis of said main grinding roller, and arranged in the direction of its rotation along its circumference between the hopper and the discharging hopper. All grinding runners are equipped with devices providing their thrust to the main grinding roller and the first grinding runner is equipped with its own drive by means of extended ends of its shaft, protruding from bearing houses, accommodating said driven shaft in the antifriction bearings.
  • the summary of the invention lies in the fact that said bearing houses of grinding runners are fitted with guide grooves, arranged in a manner to fit into guides in sidewalls of the body of the mill.
  • Guide grooves are fitted with lubrication channels and lined along their circumference with sliding plates with lubrication grooves.
  • Bearing houses of the first grinding runner are coupled by a crossbeam, to which is leaned a push rod of a compression device via an axial ball bearing.
  • bearing houses of second and third grinding runners are also coupled, identically to the first grinding runner, to crossbeams to which push rods of compression devices are leaned via axial ball bearings.
  • compression devices of second and third grinding runners may constitute a part of their bearing houses.
  • one antifriction bearing of grinding runners is axially fixed and the other is axially floating.
  • drive of the first grinding runner may be provided either by a hydraulic motor or mechanical gearbox or belt or chain gear transmission and its thrust, as well as thrust of other grinding runners, is induced by compression devices, which may be hydraulic and/or pneumatic cylinders or springs.
  • the replaceable tire of runners as well as of the main grinding roller is made of quality abrasion-resistant material, whereas these are forgings from chrome-nickel steel, and, furthermore, this material is fitted with a hard-facing layer for highly abrasive materials.
  • FIG. 1 shows a general view of the mill in the partial section perpendicular to axes of the main grinding roller and grinding runners.
  • Fig. 2 shows the first grinding runner in the section taken through the vertical axis of its compression device and perpendicular axis of its roller and
  • Fig. 3 shows the section of the first grinding runner through A-A plane shown in Fig. 2.
  • Fig. 4 shows detail B of Fig 2;
  • Fig. 5 shows detail C of Fig. 3.
  • Fig. 6 clearly shows non-driven second and/or third grinding runner, whose houses are coupled by the crossbeam similarly to the first grinding runner, whereas
  • Fig. 7 shows an alternative embodiment of the second and/or third non-driven grinding runner, where compression devices are integrated directly in their bearing houses without hinged seating of push rods.
  • the mill for grinding of materials of different hardness and grain sizes comprises drives 8, 23 and a body 4 of the mill, equipped with a hopper 5 and a discharging hopper 6, accommodating a main grinding roller i, seated in a rotating manner, and driven by a main drive 8, the main grinding roller 1 is equipped with a replaceable abrasion-resistant tire and from both sides fitted with guide rings along the circumference, overlapping its diameter, arranged in a manner to prevent ground stock leakage from the grinding slot.
  • At least three smaller grinding runners 2, 3, 3 ⁇ are accommodated in the body 4 of the mill, in a rotating and sliding manner, whose axes are parallel to the axis of the main grinding roller 1, arranged in the direction of its rotation along its circumference between the hopper 5 and the discharge hopper 6. All grinding runners 2, 3, 31 are equipped with compression devices 7 providing their thrust to the main grinding roller 1.
  • the first grinding runner 2 serves, together with the main grinding roller 1, to pull-in ground stock from the hopper 5, providing its distribution across the whole width of the main grinding roller ⁇ and its pre-grinding.
  • the first grinding runner 2 is fitted with its own drive by means of extended ends 10 of its shaft 9, protruding from bearing houses JT, where one driving device 23 is seated on each extended end JO.
  • the shaft 9 of the first grinding runner 2 is, similarly to other grinding runners 3, 3J, seated in antifriction bearings 12, accommodated in bearing houses 11, fitted with guide grooves 13, arranged to fit into the guide in sidewalls of the body 4 of the mill.
  • Guide grooves 13 are fitted with replaceable sliding plates 14, made of special sliding material, and equipped with lubrication grooves
  • the lubricant is supplied to the friction surface by lubrication channels 16.
  • Bearing houses H move in guide grooves 13 together with the entire grinding runners 2, 3, T_ in radial direction. Grinding runners 2, 3, are compressed towards the main grinding roller 1 by compression devices 7 (for instance, by linear hydraulic motors), ended with a rod T7.
  • Bearing houses JT of the first grinding runner 2 are coupled by a cross beam 18, to which mentioned push rod T7 of compression device 7 is leaned while seated in an axial ball bearing 19.
  • the axial ball bearing 19 absorbs compression force and installed plate springs 21 absorb traction force.
  • the plate spring 21 is pre-stressed, thus also defining clearance in the ball bearing 19.
  • the whole assembly is bolted to the crossbeam l_8 by a cover 22.
  • Grinding runners 2, 3, 3_ move in the guide depending on the height of ground stock layer.
  • a replaceable tire 20 is attached to the shaft 9 of the first grinding runner 2, identically to other grinding runners 3, 3 , made of abrasion-resistant material, whereas these are forgings from chrome-nickel steel and, furthermore, this material is fitted with a hard-facing layer for highly abrasive materials.
  • Second and third grinding runners 3, 3_ are of similar design construction as the first grinding runner 2; however, they are not fitted with drives but may have, as mentioned above, bearing houses 11 coupled also with crossbeams _18, to which push rods 17 of compression devices 7 are leaned while seated in the axial ball bearings 19, see Fig. 6. Said grinding runners 3, 3_ only roll on the layer of ground stock, and grinding itself is effectuated by pressure induced by compression devices
  • second and third grinding runners 3, 3_ are not fitted with the crossbeam 18, but said compression devices 7 are directly bolted into their bearing houses 11, without hinged support, see Fig. 7.
  • One antifriction bearing 12 of grinding runners 2, 3, 3_ is axially fixed and the other is axially floating.
  • the first grinding runner 2 is driven either by the hydraulic motor and/or mechanical gearbox or by belt or chain gear transmission, whereas thrust of the first grinding runner 2 as well as other grinding runners 3, y_ is induced by compression devices 7, comprising hydraulic and/or pneumatic cylinders or springs.
  • compression devices 7, comprising hydraulic and/or pneumatic cylinders or springs.
  • Speed of the first grinding runner 2 may either be controllable or fixed. Speed is selected in a manner that either circumference velocity of the first grinding runner 2 equals to the circumference velocity of the main grinding roller l, or may be adjusted in a manner that circumference velocity of the first grinding runner 2 and the main grinding roller 1 differs, thus achieving spreading effect on the ground stock.
  • Rotary movement of other two grinding runners 3, _ is induced by friction of ground stock between the main grinding roller
  • Ground stock is supplied to the hopper 5, located in the upper part of the body 4 of the mill. Ground stock is drawn from the hopper 5 by the main grinding roller 1 and is delivered to the area of the first slot between the main grinding roller 1 and the first grinding runner 2. Ground stock height is controlled by adjustment of a sliding gate at the outlet surface of the hopper 5. Ground stock is equally distributed across the whole width of the main grinding roller I by the first grinding runner 2 by lower grinding pressure, being formed and partially pre-ground at the same time.
  • Grinding pressure of the first grinding runner 2 may also be induced in a manner that the first grinding runner 2, in contrast to other grinding runners 3, 3 , does not vertically move, but rests in stops and the gap between said runner and the main grinding roller l is fixed. Subsequently, ground stock is released by slight turning of the main grinding roller L, and leaves the mentioned area. Additional slight turn of the main grinding roller I pushes released and re-arranged ground stock to the second slot, created between the main grinding roller l and the second grinding runner 3. In this point, the second grinding runner 3 acts on the ground stock by medium grinding pressure, triggering the second stage of grinding, accompanied with disintegration of ground stock grains.
  • Ground stock material is again released by another slight turn of the main grinding roller L
  • Ground stock material is delivered to the third grinding slot, created between the main grinding roller I and the third grinding runner T_, in a rather pre-ground condition, while grinding of the material is completed in this point by the highest grinding pressure (by thrust of the third grinding runner 3j). Thrusts of individual grinding runners 2, 3 and ⁇ _ may be adjusted not only in an ascending order, but arbitrarily depending on the grinding demands.
  • Ground material falls out in the lower part of the mill to the discharging hopper 6, then is transported to other transporting devices. Not shown structural embodiment of covers of the body 4 of the mill allows for complete dust-proof feature of the mill with the possibility of dust exhaust.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un broyeur pour le broyage de matériaux ayant des duretés et des granulométries différentes, comprenant des mécanismes d'entraînement (8, 23) et un corps (4), équipé d'une trémie (5) et d'une trémie de décharge (6), recevant le rouleau de broyage principal (1) monté à rotation et entraîné par le mécanisme d'entraînement principal (8), équipé d'un bandage résistant à l'abrasion remplaçable et équipé des deux côtés de bagues de guidage le long de la circonférence, chevauchant son diamètre, agencées de manière à empêcher une fuite de matière broyée depuis la fente de broyage. De plus, au moins trois patins de broyage (2, 3, 3') plus petits sont logés dans le corps (4) du broyeur, d'une manière rotative et coulissante, dont les axes sont parallèles à l'axe du rouleau de broyage principal (1) et sont disposés dans la direction de sa rotation le long de sa circonférence entre la trémie (5) et la trémie de décharge (6). Tous les patins de broyage (2, 3, 3') sont équipés de dispositifs de compression (7) qui produisent leur poussée vers le rouleau de broyage principal (1) et le premier patin de broyage (2) est équipé de son propre mécanisme d'entraînement au moyen des extrémités prolongées de son arbre (9), faisant saillie depuis les logements de palier (11), où l'arbre entraîné (9) est logé dans des paliers à roulement (12). Les logements de palier (11) de patins de broyage (2, 3, 3') sont pourvus de rainures de guidage (13) disposées de manière à s'ajuster dans le guide dans les parois latérales du corps (4) du broyeur, tandis que lesdites rainures de guidage (13) sont équipées de canaux de lubrification (16) et alignées le long de leur circonférence avec les plaques coulissantes (14) munies de rainures de lubrification (15), tandis que des logements de palier (11) du premier patin de broyage (2) sont couplés par la traverse (18) sur laquelle s'appuie la tige de poussée (17) des dispositifs de compression (7) par le biais de roulements à billes axiaux (19).
EP19748645.9A 2018-07-05 2019-06-13 Broyeur pour le broyage de matériaux ayant des duretés et des granulométries différentes Active EP3866978B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2018-336A CZ309246B6 (cs) 2018-07-05 2018-07-05 Mlýn pro mletí materiálů různé tvrdosti a zrnitosti
PCT/CZ2019/000027 WO2020007382A1 (fr) 2018-07-05 2019-06-13 Broyeur pour le broyage de matériaux ayant des duretés et des granulométries différentes

Publications (2)

Publication Number Publication Date
EP3866978A1 true EP3866978A1 (fr) 2021-08-25
EP3866978B1 EP3866978B1 (fr) 2023-09-06

Family

ID=67514259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19748645.9A Active EP3866978B1 (fr) 2018-07-05 2019-06-13 Broyeur pour le broyage de matériaux ayant des duretés et des granulométries différentes

Country Status (4)

Country Link
EP (1) EP3866978B1 (fr)
BR (1) BR112021000055A2 (fr)
CZ (1) CZ309246B6 (fr)
WO (1) WO2020007382A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111468271A (zh) * 2020-04-15 2020-07-31 新沂市瑞阳混凝土工程有限公司 一种再生混凝土废料回收装置
CN112958201A (zh) * 2021-02-25 2021-06-15 山东博研粉体技术装备有限公司 一种差速三辊辊压机
CN114798071B (zh) * 2022-06-28 2022-09-09 徐州秦泰环保科技有限公司 一种市政工程用建筑垃圾废铁过滤回收装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1796963U (de) * 1958-05-24 1959-10-01 Esch Werke Kg Walzenbrecher fuer die erzeugung von brechgut mit geringem feinkornanteil.
DE19514955C2 (de) * 1995-04-24 1997-07-10 Buehler Ag Walzenstuhl für die Vermahlung von Nahrungs- und Futtermittel
CZ292489B6 (cs) * 1999-03-19 2003-10-15 Psp Engineering A. S. Střednětlaký víceválcový lis k mletí zrnitých materiálů
CZ2002154A3 (cs) * 2002-01-15 2003-09-17 Jaromír Ing. Mísař Způsob odstranění praskání stropů zhotovených ze stropních vložek HURDIS
CZ20021541A3 (cs) 2002-05-02 2003-12-17 Psp Engineering A. S. Mlýn k mletí zrnitých materiálů
DE102007045373A1 (de) * 2007-09-22 2009-04-02 Cemag Anlagenbau Gmbh Verfahren und Vorrichtung zur Vor- und Fertigmahlung von mineralischen und nichtmineralischen Materialien
DE102009037660A1 (de) * 2009-08-14 2011-02-17 Feige, Fritz, Dr.-Ing. Verfahren und Vorrichtung zur Feinmahlung von mineralischen Materialien

Also Published As

Publication number Publication date
WO2020007382A1 (fr) 2020-01-09
EP3866978B1 (fr) 2023-09-06
BR112021000055A2 (pt) 2021-04-06
CZ2018336A3 (cs) 2020-01-15
CZ309246B6 (cs) 2022-06-22

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