DK178877B1 - Feeder apparatus and method for feeding material to a high pressure roller crusher - Google Patents

Feeder apparatus and method for feeding material to a high pressure roller crusher Download PDF

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Publication number
DK178877B1
DK178877B1 DKPA201470667A DKPA201470667A DK178877B1 DK 178877 B1 DK178877 B1 DK 178877B1 DK PA201470667 A DKPA201470667 A DK PA201470667A DK PA201470667 A DKPA201470667 A DK PA201470667A DK 178877 B1 DK178877 B1 DK 178877B1
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DK
Denmark
Prior art keywords
feeder
roller
roller crusher
feeding
crushed
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DKPA201470667A
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Danish (da)
Inventor
Lars Grönvall
Original Assignee
Metso Minerals (Sweden) Ab
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Publication of DK201470667A1 publication Critical patent/DK201470667A1/en
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Publication of DK178877B1 publication Critical patent/DK178877B1/en

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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • 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
    • B02C23/02—Feeding devices

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

Abstract

The invention relates to a feeder apparatus (7) for feeding material to be crushed or ground to a roller crusher (6) having two generally parallel rolls (8) arranged to rotate in opposite directions, towards each other, and separated by a gap. The feeder aparatus (7) comprises a main feeder (9) for feeding a first portion of said materiale to the gap of the roller crusher (6). The feeder apparatus (7) is characterised in that said feeder apparatus (7) further comprises an auxiliary feeder (10) for feeding a second portion of said material to the roller crusher (6). The auxiliary feeder (10) is arranged to feed said second portion of material to at least one of the rolls (8) at a speed which is adjustable in relation to a surface speed of said at least one roll (8). The invention also relates to a method for feeding material to be crushed or ground to a roller crusher.

Description

FEEDER APPARATUS AND METHOD FOR FEEDING MATERIAL TO A HIGH PRESSURE ROLLER CRUSHER
Technical Field of the Invention
The present invention relates to a feeder apparatus for feeding material to be crushed or ground to a roller crusher. The invention also relates to a method for feeding material to be crushed or ground to a roller crusher.
Background Art
When crushing or grinding rock, ore, cement clinker and other hard materials roller crushers may be used having two generally parallel rolls which rotate in opposite directions, towards each other, and which are separated by a gap. The material to be crushed is fed by gravity or choke-fed into the gap. One type of roller crusher is called high pressure grinding rollers or high pressure roller crushers. This type of roller crusher uses a crushing technique called interparticle crushing. Here, the material to be crushed or pulverised is crushed not only by the crushing surface of the rolls, but also by particles in the material to be crushed, hence the name interparticle crushing.
One example of a high pressure grinding roller is described in EP-516 952. High pressure grinding rollers of this kind use autogenous protection, i.e. a layer of the material to be crushed is retained on the surface of the rolls. Thus, the material to be crushed will not wear only on the surface of the roll, but mainly on the autogenous protection layer.
Another example of a high pressure grinding roller is described in DE-3823929A1, which grinding roller has a main feeder and an auxiliary feeder feeding a second portion of material to at least one of the rolls. A general problem associated with high pressure grinding rollers is the difficulty to quickly and securely establish the autogenous protection layer. It is necessary to have a proper composition of the material fed into the gap of the high pressure grinding roller or else the material will not adhere properly to the outer surface of the rolls, thereby increasing the wear on the actual surface of the rolls.
Summary of the Invention
It is an object of the present invention to provide an improvement of the above technique and prior art. More particularly, it is an object of the present invention to provide a feeder apparatus for feeding material to be crushed or ground to a roller crusher such that an autogenous protection layer quickly and securely is established on the roller crusher. Further, it is an object of the present invention to provide a method for feeding material to be crushed or ground to a roller crusher.
These and other objects as well as advantages that will be apparent from the following description of the present invention are achieved by a feeder apparatus and a method according to the independent claims. A feeder apparatus for feeding material to be crushed or ground to a roller crusher is provided. The roller crusher has two generally parallel rolls arranged to rotate in opposite directions, towards each other, and separated by a gap. The feeder apparatus comprises a main feeder for feeding a first portion of said material to the gap of the roller crusher. The feeder apparatus is characterised in that it further comprises an auxiliary feeder for feeding a second portion of said material to the roller crusher. The auxiliary feeder is arranged to feed said second portion of material to at least one of the rolls at a speed which is adjustable in relation to a surface speed of said at least one roll. This is advantageous in that an autogenous protection layer quickly and securely can be established on the outer surface of the rolls of the roller crusher. Normally, material fed into the gap of the roller crusher will have trouble to adhere properly to the outer surface of the rolls. This depends on several factors, such as for example, that the material is fed at an unsuitable speed, in an unsuitable direction, or has an unsuitable composition. When material, however, is fed to the rolls of the roller crusher by the auxiliary feeder, in addition to the material fed into the gap of the roller crusher by the main feeder, both the speed, composition and direction of that second portion of material can be determined in order to quickly and securely achieve the desired autogenous protection of the rolls. In a preferred embodiment of the present invention, the auxiliary feeder is arranged to feed said second portion of material to at least one of the rolls at a speed essentially corresponding to a surface speed of said at least one roll.
The auxiliary feeder may be arranged to feed said second portion of material to said at least one roll in a direction essentially tangential to an outer surface of said at least one roll, which is advantageous in that the providing of the autogenous protection of the rolls will be further facilitated.
The auxiliary feeder may comprise at least one belt conveyor, and preferably two belt conveyors, each belt conveyor being arranged to feed said second portion of material to a respective roll of the roller crusher. This is advantageous in that both rolls of the roller crusher may be provided with the same autogenous protection in a controlled and simple way. Naturally, if desired, the autogenous protection of the two rolls could be varied by operating the two belt conveyors at different speed or direction and by using different compositions of the fed material. The auxiliary feeder may alternatively comprise at least one screw conveyor.
The second portion of the material may comprise new material, recirculated screen material, adhesive, any other suitable material or a combination thereof. Thus, the material composition may be varied in order to achieve the best possible result under the existing circumstances.
The feeding apparatus may further comprise a recirculation device arranged to collect a recirculation portion of material that has been crushed or ground by said roller crusher and to transfer said recirculation portion to said auxiliary feeder. This is advantageous in that the feeding apparatus will thus be totally automatic. There will be no manual requirements to provide the auxiliary feeder with material to be fed to the rolls.
The feeding apparatus may further comprise a conditioning device for conditioning said second portion of material, said conditioning device may comprise a water supplying device. This is advantageous in that the composition of the material easily can be controlled.
The main feeder may be arranged to choke feed said first portion of said material to the gap of the roller crusher, which is advantageous in that improved crushing performance can be achieved.
According to a second aspect of the invention, the invention relates to a method for feeding material to be crushed or ground to a roller crusher. The roller crusher has two generally parallel rolls arranged to rotate in opposite directions, towards each other, and separated by a gap, wherein a first portion of said material is fed to the gap of the roller crusher by a main feeder. The method is characterised in that a second portion of said material is fed to at least one roll of the roller crusher by an auxiliary feeder at a speed which is adjustable in relation to a surface speed of said at least one roll.
The second portion of material may be fed to said at least one roll in a direction essentially tangential to an outer surface of said at least one roll.
The method may further comprise recirculating material that has been crushed or ground by said roller crusher by collecting a recirculation portion of the crushed material and transferring said recirculation portion to said auxiliary feeder.
The method may further comprise conditioning said second portion of material before it is fed to said at least one roll, said conditioning may comprise supplying water to said second portion of material.
The first portion of said material may be choke fed by the main feeder to the gap of the roller crusher.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, etc]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, etc., unless explicitly stated otherwise. Further, by the term “comprising” it is meant “comprising but not limited to” throughout the application.
Brief description of the drawings
The above, as well as additional objects, features and advantages of the present invention, will be better understood through the following illustrative and non-limiting detailed description of preferred embodiments of the present invention, with reference to the appended drawings, where the same reference numerals will be used for similar elements, wherein:
Fig. 1 is a perspective view of a roller crusher without a feeding arrangement, and
Fig. 2 is a perspective view of a roller crusher having a feeder apparatus according to one exemplary embodiment of the present invention.
Detailed description of preferred embodiments of the invention
Fig. 1 illustrates a conventional roller crusher 1 without a feeding arrangement.. The roller crusher 1 has two crushing rollers 2, which are parallel to one another and rotate in opposite directions, towards each other. Each one of the crushing rollers 2 has a shaft 3 with end portions 4 mounted in respective roller bearings 5. The roller crusher 1 has a feeding arrangement 6 for feeding material to be crushed to a crushing zone of the roller crusher 1. After the material has been crushed in the crushing zone, it is transported away from the roller crusher 1.
In Fig. 2, a roller crusher 6 having a feeder apparatus 7 according to one embodiment of the present invention is illustrated. The feeder apparatus 7 is adapted to feed material to be crushed or ground to the roller crusher 6. The roller crusher 6 has two generally parallel rolls 8 arranged to rotate in opposite directions, towards each other, and are separated by a gap. The feeder apparatus 7 comprises a main feeder 9 for feeding a first portion of the material to the gap of the roller crusher 6, and two auxiliary feeders 10 for feeding a second portion of the material to the roller crusher 6. The auxiliary feeders 10 feed the second portion of material to the two rolls 8 at a speed which is adjustable in relation to a surface speed of the two rolls 8. Each one of the auxiliary feeders 10 comprises a belt conveyor which is arranged to feed the second portion of material to the rolls 8 in a direction essentially tangential to the outer surface of the rolls 8. The feeder apparatus has two recirculation devices 11, one for each roll 8, arranged to collect a recirculation portion of material that has been crushed or ground by said roller crusher 6 and to transfer the recirculation portion to the auxiliary feeder 10. Thus, the second portion of material fed to the rolls 8 can be either new material, recirculated screen material, adhesive, any other suitable material or a combination thereof. The feeder apparatus 7 has four conditioning devices 12 for condi tioning the second portion of material. The conditioning devices 12 are merely constituted by a water supplying device. Naturally, other types of conditioning devices 12 can also be used for the feeder apparatus, e.g. for heating, cooling, or mixing the second portion of material, or adding a chemical conditioning agent to the second portion of material.
During the crushing operation of the roller crusher 1, the first portion of the material to be crushed is transported by the main feeder 9 of the feeder apparatus 7 and introduced in the funnel of the roller crusher 6. The material then travels by gravity from the funnel to the crushing zone. When the material has been crushed by means of the two parallel and rotating crushing rolls 8, it travels by gravity out of the crushing zone in order to be transported from the plant. Simultaneously, a second portion of the material is transported by the two auxiliary feeders 10 to be introduced directly on the rotating crushing rolls 8. The second portion of the material is generally more fine-grained than the first portion of the material and is feed to the rolls 8 at a speed which is adjustable in relation to a surface speed of the rolls 8. By adjusting the feeding speed of the auxiliary feeders 10, some characteristics of the autogenous protection layers of the rolls 8, such as for example their thickness, can be controlled to a certain extent. When material is fed to the rolls 8 of the roller crusher 6 by the auxiliary feeder 10, in addition to the material fed into the gap of the roller crusher 6 by the main feeder 9, both the speed, composition and direction of that material can be determined in order to achieve the desired autogenous protection of the rolls 8. The recirculation devices then collect a recirculation portion of material that has been crushed or ground by said roller crusher 6 and transfer the recirculation portion back to the auxiliary feeder 10.
According to a second aspect of the invention, a method for feeding material to be crushed or ground to a roller crusher 6 is provided. The roller crusher 6 has two generally parallel rolls 8 arranged to rotate in opposite directions, towards each other, and separated by a gap, wherein a first portion of said material is fed to the gap of the roller crusher 6 by a main feeder 9. The method is characterised in that a second portion of said material is fed to at least one roll 8 of the roller crusher 6 by an auxiliary feeder 10 at a speed which is adjustable in relation to a surface speed of said at least one roll 8.
The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended claims.
For instance, the number and type of main feeders and auxiliary feeders can be varied. The feeders may, for example, be belt conveyors, screw conveyers, or be feeding by gravity.
The recirculation device may be varied in different ways and can be of any suitable sort. The same applies to the conditioning devices and the amount thereof.
By new material is meant material that not yet has passed through the gap between the rolls of the roller crusher. The new material that is fed to the rolls of the roller crusher by means of the auxiliary feeder may comprise adhesive or any other suitable material in order to achieve the desired autogenous protection layer on the rolls.

Claims (15)

1. Fodeapparat (7) til at fode materiale, der skal knuses eller formales, til en valseknuser (6) med to i hovedsagen parallelle valser (8), der er indrettede til at rotere i modsatte retninger imod hinanden og er adskilt af en spalte, hvilket fodeapparat (7) omfatter en hovedfpder (9) til at fode en forste andel af naevnte materiale til spalten hos valseknuseren (6), hvilket fodeapparat (7) yderligere omfatter en hjaelpefoder (10) til at fode en anden andel af naevnte materiale til valseknuseren (6), kendetegnet ved, at naevnte hjaelpefoder (10) er indrettet til at fode naevnte anden materialeandel til mindst en af valserne (8) ved en hastighed, der er justerbar i forhold til en overfladehastighed af naevnte mindst ene valse (8).A feeding apparatus (7) for feeding material to be crushed or ground to a roller crusher (6) with two substantially parallel rollers (8) arranged to rotate in opposite directions to each other and separated by a slot said footer (7) comprising a main feeder (9) for feeding a first portion of said material to the slot of said roller crusher (6), said footer (7) further comprising an auxiliary liner (10) for feeding another portion of said material to the roller crusher (6), characterized in that said auxiliary feed (10) is adapted to feed said second material portion to at least one of the rollers (8) at a speed adjustable to a surface speed of said at least one roller (8). ). 2. Fodeapparat (7) ifolge krav 1, hvor naevnte hjaelpefoder (10) er indrettet til at fode naevnte anden materialeandel til naevnte mindst ene valse (8) i en retning, der er i det vaesentlige tangentiel til en ydre overflade af naevnte mindst ene valse (8).Feeder (7) according to claim 1, wherein said auxiliary feed (10) is adapted to feed said second material portion to said at least one roller (8) in a direction substantially tangential to an outer surface of said at least one false (8). 3. Fodeapparat (7) ifolge krav 1 eller 2, hvor naevnte hjaelpeföder (10) omfatter mindst en baeltetransportor.Feeder (7) according to claim 1 or 2, wherein said auxiliary feeder (10) comprises at least one belt conveyor. 4. Fodeapparat (7) ifolge krav 3, hvor naevnte hjeelpeföder (10) omfatter to bae I tetrans porto re r, hvor hver baeltetransportor er indrettet til at fode naevnte anden materialeandel til en respektiv valse hos valseknuseren (6).Feeder (7) according to claim 3, wherein said auxiliary feeder (10) comprises two beam transporters, each belt conveyor being adapted to feed said second material portion to a respective roller of the roller crusher (6). 5. Fodeapparat (7) ifolge et hvilket som helst af de foregaende krav, yderligere omfattende en recirkuleringsindretning (11), der er indrettet til at samle en recirkuleringsmaterialeandel, der er blevet knust eller formalet af naevnte valseknuser (6), og at overture naevnte recirkuleringsandel til naevnte hjaelpefoder (10).Feeding apparatus (7) according to any one of the preceding claims, further comprising a recycling device (11) adapted to assemble a recycle material portion which has been crushed or ground by said roll crusher (6) and to overturn said recycling rate for said auxiliary feed (10). 6. Fodeapparat (7) ifolge et hvilket som helst af de foregaende krav, hvor naevnte anden materialeandel omfatter nyt materiale, recirkuleret sigtemateriale, klaebemiddel eller en kombination deraf.Feeder (7) according to any one of the preceding claims, wherein said other material portion comprises new material, recycled screen material, adhesive or a combination thereof. 7. Fodeapparat (7) ifolge et hvilket som helst af de foregaende krav, yderligere omfattende en konditioneringsindretning (12) til konditionering af naevnte anden materialeandel.Feeding apparatus (7) according to any one of the preceding claims, further comprising a conditioning device (12) for conditioning said second material portion. 8. Fodeapparat (7) ifolge krav 7, hvor naevnte konditioneringsindretning (12) omfatter en vandtilforselsindretning.Feeder (7) according to claim 7, wherein said conditioning device (12) comprises a water supply device. 9. Fodeapparat (7) ifolge et hvilket som helst af de foregaende krav, hvor naevnte hovedföder (9) er indrettet til at drosselföde naevnte forste andel af naevnte materiale til spalten hos valseknuseren (6).Feeder (7) according to any one of the preceding claims, wherein said main feeder (9) is adapted to throttle feed said first portion of said material to the slot of the roller crusher (6). 10. Fremgangsmade til at f0de materiale, der skal knuses eller formales, til en valseknuser (6) med to i hovedsagen parallelle valser (8), der er indrettede til at rotere i modsatte retninger imod hinanden og er adskilt af en spalte, hvor en forste andel af naevnte materiale fodes til spalten hos valseknuseren (6) af en hovedfoder (9), kende-t e g n e t ved, at en anden andel af naevnte materiale fodes til mindst en valse (8) hos valseknuseren (6) af en hjaelpefoder (10) ved en hastighed, som er justerbar i forhold til en overfladehastighed af naevnte mindste ene valse (8).A method of feeding material to be crushed or ground to a roller crusher (6) with two substantially parallel rollers (8) arranged to rotate in opposite directions to each other and separated by a slot wherein a first portion of said material is fed to the slot of the roller crusher (6) by a main feeder (9), characterized in that a second portion of said material is fed to at least one roller (8) of the roller crusher (6) by an auxiliary feed ( 10) at a speed adjustable to a surface speed of said at least one roller (8). 11. Fremgangsmade ifolge krav 10, hvor naevnte anden materialeandel fodes til naevnte mindst ene valse (8) i en retning, der er i det veesentlige tangentiel til en ydre overflade af naevnte mindst ene valse (8).The method of claim 10, wherein said second piece of material is fed to said at least one roller (8) in a direction substantially tangential to an outer surface of said at least one roller (8). 12. Fremgangsmade ifolge krav 10 eller 11, yderligere omfattende at recirkulere materiale, der er blevet knust eller formalet af naevnte valseknuser (6), ved at samle en recirkuleringsandel af det knuste materiale og at overfode naevnte recirkuleringsandel til naevnte hjaelpefoder (10).A method according to claim 10 or 11, further comprising recycling material which has been crushed or ground by said roll crusher (6), by collecting a recycle portion of said crushed material and overfeeding said recycle portion to said auxiliary feed (10). 13. Fremgangsmade ifolge et hvilket som helst af kravene 10-12, yderligere omfattende en konditionering af naevnte anden materialeandel for den fodes til naevnte mindst ene valse (8).A method according to any one of claims 10-12, further comprising conditioning a said second material portion of said foot to said at least one roller (8). 14. Fremgangsmade ifolge krav 13, hvor naevnte konditionering omfatter at tilfore vand til naevnte anden materialeandel.The method of claim 13, wherein said conditioning comprises supplying water to said second material portion. 15. Fremgangsmade et hvilket som helst af kravene 10-14, hvor naevnte forste andel af naevnte materiale drosselfodes af hovedfoderen (9) til spalten hos valseknuseren (6).The method of any one of claims 10-14, wherein said first portion of said material is throttled by the main feeder (9) to the slot of the roller crusher (6).
DKPA201470667A 2012-04-20 2014-10-31 Feeder apparatus and method for feeding material to a high pressure roller crusher DK178877B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/057296 WO2013156083A1 (en) 2012-04-20 2012-04-20 Feeder aparatus and method for feeding material to a high pressure roller crusher

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DK178877B1 true DK178877B1 (en) 2017-04-18

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CN (2) CN104284728B (en)
AR (1) AR090751A1 (en)
AU (1) AU2013205182B2 (en)
DE (1) DE112012006241T5 (en)
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WO (1) WO2013156083A1 (en)

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ES2895170T3 (en) * 2014-07-15 2022-02-17 Knauf Gips Kg Method and apparatus for producing a gypsum board
CN109311019B (en) * 2016-04-08 2021-04-16 美卓奥图泰瑞典有限公司 Crusher comprising a replaceable protective lining
CN108787091A (en) * 2018-06-13 2018-11-13 包旭红 A kind of electric energy meter scraps processing unit
US11077446B2 (en) * 2018-10-01 2021-08-03 Metso Outotec USA Inc. Startup sequence for roller crusher
CN109876886B (en) * 2019-03-27 2020-09-01 太原金圆水泥有限公司 Grinding equipment for cement clinker production

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EP0399192A1 (en) * 1989-05-22 1990-11-28 Klöckner-Humboldt-Deutz Aktiengesellschaft Roller mill, especially for pressure milling of granular material
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US3226042A (en) * 1961-08-26 1965-12-28 Tadeusz W Adamski Method of and apparatus for grinding hard materials
DE3823929A1 (en) * 1987-08-11 1989-02-23 Smidth & Co As F L Method and apparatus for roll-crushing and -grinding or for mineral substances
EP0399192A1 (en) * 1989-05-22 1990-11-28 Klöckner-Humboldt-Deutz Aktiengesellschaft Roller mill, especially for pressure milling of granular material
US6517016B1 (en) * 1998-04-18 2003-02-11 Cemag Gmbh Process and device for fine crushing of mineral and non-mineral substances
DE10218424A1 (en) * 2001-04-30 2002-12-12 Schmidt Seeger Ag Malt mill sensors for correction of production process via regulation algorithm, comprises continually monitoring process parameters
WO2009037356A1 (en) * 2007-09-22 2009-03-26 Cemag Anlagenbau Gmbh Method of, and apparatus for, the preliminary grinding and finishing of mineral and non-mineral materials
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DE202010009150U1 (en) * 2010-06-16 2010-08-26 Khd Humboldt Wedag Gmbh Kreislaufmahlanlage with integrated buffer

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CN104284728B (en) 2017-06-27
AU2013205182A1 (en) 2013-11-07
WO2013156083A1 (en) 2013-10-24
DE112012006241T5 (en) 2015-03-05
AU2013205182B2 (en) 2015-07-02
AR090751A1 (en) 2014-12-03
CN104284728A (en) 2015-01-14
DK201470667A1 (en) 2014-10-31
CN203577861U (en) 2014-05-07

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