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EP0352192B1 - Process for grinding and compacting any kind of ore and apparatus for carrying out this process - Google Patents

Process for grinding and compacting any kind of ore and apparatus for carrying out this process Download PDF

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Publication number
EP0352192B1
EP0352192B1 EP89402066A EP89402066A EP0352192B1 EP 0352192 B1 EP0352192 B1 EP 0352192B1 EP 89402066 A EP89402066 A EP 89402066A EP 89402066 A EP89402066 A EP 89402066A EP 0352192 B1 EP0352192 B1 EP 0352192B1
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EP
European Patent Office
Prior art keywords
press
product
density
outlet
agglomerated
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.)
Expired - Lifetime
Application number
EP89402066A
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German (de)
French (fr)
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EP0352192A1 (en
Inventor
Maurice Paliard
Jean-Marc Martin
Francis Cochet
Benoît Valdelievre
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.)
Technip Energies France SAS
Original Assignee
Technip SA
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Priority to AT89402066T priority Critical patent/ATE99563T1/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
    • 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
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
    • 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
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator

Definitions

  • the present invention essentially relates to a process for grinding and compacting any mineral material, such as for example cement clinker.
  • roller presses for grinding and compacting various mineral or organic materials has been known for a long time. It is also known that, in order to obtain regular operation of the roller presses, the material feeding the press must be preconditioned to avoid excessive swelling in the feed.
  • Also known from document US-A-3 887 142 is a process for grinding ore with added water, in which the arrival of ore and water at using density and flow measurement devices placed on the circuit traversed by the aqueous suspension collected downstream of the mill.
  • the present invention aims to remedy this drawback in particular by proposing a method and a grinding installation which make it possible to ideally precondition the material feeding the press, which can thus work optimally.
  • the subject of the invention is a process for grinding and compacting any raw mineral material, such as for example cement clinker, and of the type consisting in preconditioning this material before crushing it by crushing in a press.
  • rollers characterized in that a mixture of said raw mineral material is passed with an agglomerated or compacted product recycled and with a grainy or pulverized product recycled in said roller press, the product leaving the roller press is fractionated in an agglomerated or compacted product, in a grainy or powdery product, and in a product end which is evacuated, and at least part of the agglomerated or compacted product and at least part of the granular or pulverulent product are recycled to said roller press to form a preconditioned mixture sent to said roller press, and the density is checked.
  • the bulk density at the press feed is regulated between 1.7 and 2.05.
  • the invention also relates to a grinding and compacting installation for the implementation of the process corresponding to the above characteristics and of the type comprising a roller press allowing the grinding and partial agglomeration of any mineral material, means for passing said mineral material through said press, and, downstream of this press, a means of transport associated with a first distributor system and allowing the recycling of a part of the crushed and partially agglomerated material towards the press supply, characterized in that it comprises a second distributor system supplied with the other part of the material leaving the first distributor system, said second distributor system having a first outlet and a second outlet, the first outlet communicating with said means of transport to thereby regulate the quantity and density of the crushed and partially agglomerated material recycled to the feed of the roller press, and the second outlet communicating with a separator to separate the fine product from a grainy or powdery product ranging by a pipe to the feed to the roller press, and in that it further comprises an apparatus for measuring the density of the material feeding the press, located at the entrance to said press.
  • one of the two aforementioned distributing systems is a screen or a sieve.
  • This installation is further characterized in that it is further equipped with a third distributor for the grainy or pulverulent product, a first outlet of which is connected by a conduit to the inlet of the roller press, and a second outlet is connected. at the second output of the aforementioned second distributor system.
  • this installation also comprises means allowing the device for measuring the density of the material feeding the press to act automatically on the first distributor system and the third distributor system so as to allow the control of the density of the products feeding said press.
  • the installation visible in the single figure is a grinding installation in a closed circuit comprising a press 1 with rollers 2, the inlet 3 of which is provided with a device for measuring the density of the products feeding the press. 1, which device is identified schematically in 4.
  • the press 1 is supplied with raw products as materialized by line 5, with a ground product and partially agglomerated by the press and recycled, as materialized by line 6, and with grainy or powdery products, as materialized by line 7, these latest products from a pneumatic separator or equivalent system 8.
  • the separator 8 receives a mixture of ground products, as will be described in detail below, and this by line 9, and it separates said mixture into a fine and finished product which is discharged in suspension in the gases extracted via line 10 , and in a grainy or pulverulent product which leaves the separator 8 via the pipe 11. It will be observed here that the separator 8 ensures, at the level of the bodies for distributing the material, a disaggregation function.
  • the crushed and agglomerated product forms a stream 12 passing through a first distributor system 13 dividing the material into two partial streams marked at 14 and 15.
  • the stream 14 essentially comprising compacted plates is recycled to the input 3 of the press 1 by a means of transport 16 connected to the line 6 previously mentioned.
  • the other part or flow 15 of the material leaving the first system distributor 13 feeds a second distributor system 17 dividing the flow of crushed and partially agglomerated product on the one hand into coarse elements leaving through line 18 communicating with the means of transport 16, and on the other hand into fine products leaving through line 19 .
  • line 19 could lead directly to the conveyor 20 recycling the fine products to the inlet of the pneumatic separator 8 via the line 9 mentioned above.
  • the separator 8 outlet pipe 11 is equipped with a third distributor system 21, the outlet of which is connected on the one hand to the line 7 leading to the inlet 3 of the press 1, and on the other hand, although this is not shown, at the outlet 19 of the second distributor system 17, via a conduit or the like 22, for the purpose of directly recycling the grainy product to the feed of the separator 8.
  • the installation comprises additional grinding equipment shown diagrammatically at 23 which may be constituted by a ball, bar, vibrating, impact or similar mill.
  • outlet 19 can be equipped with a distribution flap 24 for the finished products leaving the second distribution system 17.
  • the distribution flap 24 subdivides the material which reaches it into two lines, namely a line 25 terminating in the crusher 23 and a line 26 terminating in the conveyor 20, which also receives the ground products extracted from the crusher 23 by the line 27.
  • the duct 22 instead of being directly connected to the outlet 19 of the second distributor system 17, is here connected to the inlet of the crusher 23, which may include ventilation which can be used to extract at least part of the ground product.
  • the density in bulk or of the mixture of the various forms of the material fed to the inlet 3 of the roller press 1 by the lines 5, 6 and 7 will be modulated in such a way that it lies within a range allowing stable operation. of the press, and this essentially by modulating the proportion of recycled platelets in line 6, by actuation of the first distributor system 13.
  • the above-mentioned bulk density will also be advantageously modulated by acting on the third system distributor 21 to modulate the proportion of granular products passing through line 7.
  • the second distributor system 17 also intervenes for the regulation of the bulk density of the products feeding press 1 since, as we understand, it plays a role as regards the quantity of plates leaving the first distributor system 13 and recycled at the inlet 3 of the press 1 via the transport means 16.
  • the second distributor system 17 or the first distributor system 13 can be constituted by a screen, a sieve or the like.
  • the bulk density of the material feeding the roller press should have, according to an essential characteristic of this invention, a value between 0.60 D p and 0.90 D p , D p being the density of the agglomerated or compacted product leaving the press.
  • the density of the material feeding the press will preferably be between 0.68 and 0.85 D p, it being understood that the regulation of the density giving the press excellent operating stability can be carried out in any suitable manner.
  • the density measuring device 4 located at the inlet 3 of the press 1 will advantageously and at all times allow the density of the products feeding said press to be controlled, this device possibly being able to act automatically on the distributing systems 13 and 21.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Press Drives And Press Lines (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
  • Fertilizers (AREA)

Abstract

A system comprising a roll press for crushing and partially agglomerating a mineral material, a conveyor means arranged downstream of this press and associated with a distributor device and allowing to recycle one portion of the crushed and partially agglomerated material to the inlet of the press whereas the other portion of the material issuing from this distributor device feeds a second distributor device one outlet of which communicates with the conveyor means to thereby control the amount and density of the crushed and partially agglomerated material recycled to the feed of the press.

Description

La présente invention a essentiellement pour objet un procédé de broyage et compactage d'une matière minérale quelconque, telle que par exemple du clinker de ciment.The present invention essentially relates to a process for grinding and compacting any mineral material, such as for example cement clinker.

Elle vise également une installation pour la mise en oeuvre de ce procédé.It also relates to an installation for the implementation of this process.

L'utilisation des presses à rouleaux pour le broyage et le compactage de matières minérales ou organiques diverses est connue depuis longtemps. On sait également que, pour obtenir un fonctionnement régulier des presses à rouleaux, il convient de préconditionner la matière alimentant la presse pour éviter un foisonnement excessif à l'alimentation.The use of roller presses for grinding and compacting various mineral or organic materials has been known for a long time. It is also known that, in order to obtain regular operation of the roller presses, the material feeding the press must be preconditioned to avoid excessive swelling in the feed.

C'est ainsi qu'il est connu d'utiliser par exemple sur les presses de compactage d'engrais une ou plusieurs hélices entraînées en rotation pour réaliser un pré-compactage de la matière à l'alimentation de la presse à rouleaux.It is thus known to use, for example, on fertilizer compacting presses, one or more propellers driven in rotation to pre-compact the material for feeding to the roller press.

On connait également des installations de broyage munies de rouleaux permettant un broyage préalable de la matière à broyer, ce qui permet de réaliser un pré-compactage de la matière avant d'appliquer l'effort final de broyage.There are also known grinding installations provided with rollers allowing prior grinding of the material to be ground, which makes it possible to carry out a pre-compacting of the material before applying the final grinding force.

Par ailleurs, on connait d'après le document EP-A-0 238 432 un procédé de broyage du type décrit dans le préambule de la revendication 1 et qui utilise un broyeur à boulets.Furthermore, from document EP-A-0 238 432, a grinding process of the type described in the preamble to claim 1 and which uses a ball mill is known.

On connait encore d'après le document US-A-3 887 142 un procédé de broyage de minerai additionné d'eau, dans lequel on contrôle les arrivées de minerai et d'eau à l'aide d'appareils de mesure de densité et de débit placés sur le circuit parcouru par la suspension aqueuse recueillie en aval du broyeur.Also known from document US-A-3 887 142 is a process for grinding ore with added water, in which the arrival of ore and water at using density and flow measurement devices placed on the circuit traversed by the aqueous suspension collected downstream of the mill.

Dans le document DE-A-3 506 502 est décrite une installation de broyage, notamment pour le ciment, dans laquelle le broyeur principal est suivi d'un tamis qui permet le recyclage audit broyeur de la fraction grossière de produit qui n'a pas encore la finesse désirée.In document DE-A-3 506 502, a grinding installation is described, in particular for cement, in which the main grinder is followed by a sieve which allows the coarse fraction of product which has not been recycled to said grinder. still the desired finesse.

Mais, dans toutes ces installations connues, il a été constaté qu'il n'était pas possible d'obtenir un fonctionnement stable de la presse qui, comme on le sait doit transmettre des énergies très élevées à la matière dans les applications de broyage fin.However, in all these known installations, it has been found that it was not possible to obtain stable operation of the press which, as is known must transmit very high energies to the material in fine grinding applications .

Aussi, la présente invention a pour but de remédier notamment à cet inconvénient en proposant un procédé et une installation de broyage qui permettent de préconditionner de manière idéale la matière alimentant la presse, laquelle peut ainsi travailler de façon optimale.Also, the present invention aims to remedy this drawback in particular by proposing a method and a grinding installation which make it possible to ideally precondition the material feeding the press, which can thus work optimally.

A cet effet, l'invention a pour objet un procédé de broyage et compactage d'une matière minérale brute quelconque, telle que par exemple du clinker de ciment, et du type consistant à préconditionner cette matière avant de la broyer par écrasement dans une presse à rouleaux, caractérisé en ce que l'on fait passer un mélange de ladite matière minérale brute avec un produit aggloméré ou compacté recyclé et avec un produit grenu ou pulvérisent recyclé dans ladite presse à rouleaux, on fractionne le produit sortant de la presse à rouleaux en un produit aggloméré ou compacté, en un produit grenu ou pulvérulent, et en un produit fin qui est évacué, et on recycle à ladite presse à rouleaux une partie au moins du produit aggloméré ou compacté et une partie au moins du produit grenu ou pulvérulent pour constituer un mélange préconditionné envoyé à ladite presse a rouleaux, et on contrôle la densité en vrac des produits alimentant la presse en modulant la proportion de produit aggloméré recyclé et la proportion de produit grenu recyclé afin que ladite densité en vrac des produits alimentant la presse à rouleaux soit maintenue à une valeur comprise entre 0,68 Dp et 0,85 Dp, Dp étant la densité du produit aggloméré ou compacte sortant de la presse, afin d'assurer un fonctionnement stable de cette dernière et donc stabiliser la consommation énergétique instantanée nécessaire au broyage.To this end, the subject of the invention is a process for grinding and compacting any raw mineral material, such as for example cement clinker, and of the type consisting in preconditioning this material before crushing it by crushing in a press. with rollers, characterized in that a mixture of said raw mineral material is passed with an agglomerated or compacted product recycled and with a grainy or pulverized product recycled in said roller press, the product leaving the roller press is fractionated in an agglomerated or compacted product, in a grainy or powdery product, and in a product end which is evacuated, and at least part of the agglomerated or compacted product and at least part of the granular or pulverulent product are recycled to said roller press to form a preconditioned mixture sent to said roller press, and the density is checked. bulk of the products feeding the press by modulating the proportion of agglomerated product recycled and the proportion of grained product recycled so that said bulk density of the products feeding the roller press is maintained at a value of between 0.68 D p and 0.85 D p , D p being the density of the agglomerated or compact product leaving the press, in order to ensure stable operation of the latter and therefore stabilize the instantaneous energy consumption necessary for grinding.

Selon encore une autre caractéristique de ce procédé, pour le broyage du ciment, la densité en vrac à l'alimentation de la presse est régulée entre 1,7 et 2,05.According to yet another characteristic of this process, for grinding the cement, the bulk density at the press feed is regulated between 1.7 and 2.05.

L'invention vise également une installation de broyage et compactage pour la mise en oeuvre du procédé répondant aux caractéristiques ci-dessus et du type comprenant une presse à rouleaux permettant le broyage et l'agglomération partielle d'une matière minérale quelconque, des moyens pour faire passer dans ladite presse ladite matière minérale, et, en aval de cette presse, un moyen de transport associé à un premier système répartiteur et permettant le recyclage d'une partie de la matière broyée et partiellement agglomérée vers l'alimentation de la presse, caractérisée en ce qu'elle comprend un deuxième système répartiteur alimenté par l'autre partie de la matière sortant du premier système répartiteur, ledit deuxième système répartiteur ayant une première sortie et une seconde sortie, la première sortie communiquant avec ledit moyen de transport pour ainsi réguler la quantité et la densité de la matière broyée et partiellement agglomérée recyclée vers l'alimentation de la presse à rouleaux, et la seconde sortie communiquant avec un séparateur pour séparer du produit fin d'un produit grenu ou pulvérulent allant par une conduite vers l'alimentation de la presse à rouleaux, et en ce qu'elle comprend en outre un appareil de mesure de densité de la matière alimentant la presse, situé à l'entrée de ladite presse.The invention also relates to a grinding and compacting installation for the implementation of the process corresponding to the above characteristics and of the type comprising a roller press allowing the grinding and partial agglomeration of any mineral material, means for passing said mineral material through said press, and, downstream of this press, a means of transport associated with a first distributor system and allowing the recycling of a part of the crushed and partially agglomerated material towards the press supply, characterized in that it comprises a second distributor system supplied with the other part of the material leaving the first distributor system, said second distributor system having a first outlet and a second outlet, the first outlet communicating with said means of transport to thereby regulate the quantity and density of the crushed and partially agglomerated material recycled to the feed of the roller press, and the second outlet communicating with a separator to separate the fine product from a grainy or powdery product ranging by a pipe to the feed to the roller press, and in that it further comprises an apparatus for measuring the density of the material feeding the press, located at the entrance to said press.

Selon une autre caractéristique de cette installation l'un des deux systèmes répartiteurs précités est un crible ou un tamis.According to another characteristic of this installation, one of the two aforementioned distributing systems is a screen or a sieve.

Cette installation est encore caractérisée en ce qu'elle est équipée en outre d'un troisième répartiteur pour le produit grenu ou pulvérulent dont une première sortie est raccordée par un conduit à l'entrée de la presse à rouleaux, et une deuxième sortie est raccordée à la seconde sortie du deuxième système répartiteur précité.This installation is further characterized in that it is further equipped with a third distributor for the grainy or pulverulent product, a first outlet of which is connected by a conduit to the inlet of the roller press, and a second outlet is connected. at the second output of the aforementioned second distributor system.

Suivant une autre caractéristique, cette installation comporte en outre des moyens permettant à l'appareil de mesure de la densité de la matière alimentant la presse d'agir automatiquement sur le premier système répartiteur et le troisième système répartiteur de manière à permettre le contrôle de la densité des produits alimentant ladite presse.According to another characteristic, this installation also comprises means allowing the device for measuring the density of the material feeding the press to act automatically on the first distributor system and the third distributor system so as to allow the control of the density of the products feeding said press.

Mais d'autres caractéristiques et avantages de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère au dessin unique annexé, donné uniquement à titre d'exemple, et illustrant schématiquement une installation de broyage conforme aux principes de cette invention.However, other characteristics and advantages of the invention will appear better in the detailed description which follows and refers to the single appended drawing, given solely by way of example, and illustrating schematically a grinding installation in accordance with the principles of this invention.

Suivant un exemple de réalisation, l'installation visible sur la figure unique est une installation de broyage en circuit fermé comprenant une presse 1 à rouleaux 2 dont l'entrée 3 est munie d'un appareil de mesure de la densité des produits alimentant la presse 1, lequel appareil est repéré schématiquement en 4.According to an exemplary embodiment, the installation visible in the single figure is a grinding installation in a closed circuit comprising a press 1 with rollers 2, the inlet 3 of which is provided with a device for measuring the density of the products feeding the press. 1, which device is identified schematically in 4.

La presse 1 est alimentée en produits bruts comme matérialisé par la ligne 5, en un produit broyé et partiellement aggloméré par la presse et recyclé, comme matérialisé par la ligne 6, et en produits grenus ou pulvérulents, comme matérialisé par la ligne 7, ces derniers produits provenant d'un séparateur pneumatique ou d'un système équivalent 8.The press 1 is supplied with raw products as materialized by line 5, with a ground product and partially agglomerated by the press and recycled, as materialized by line 6, and with grainy or powdery products, as materialized by line 7, these latest products from a pneumatic separator or equivalent system 8.

Le séparateur 8 reçoit un mélange de produits broyés, comme on le décrira en détail plus loin, et cela par la ligne 9, et il sépare ledit mélange en un produit fin et fini qui est évacué en suspension dans les gaz extraits par la conduite 10, et en un produit grenu ou pulvérulent qui sort du séparateur 8 par la conduite 11. On observera ici que le séparateur 8 assure, au niveau des organes de répartition de la matière une fonction de désagglomération.The separator 8 receives a mixture of ground products, as will be described in detail below, and this by line 9, and it separates said mixture into a fine and finished product which is discharged in suspension in the gases extracted via line 10 , and in a grainy or pulverulent product which leaves the separator 8 via the pipe 11. It will be observed here that the separator 8 ensures, at the level of the bodies for distributing the material, a disaggregation function.

En aval de la presse 1 à rouleaux 2, Le produit broyé et aggloméré forme un flux 12 passant dans un premier système répartiteur 13 divisant la matière en deux flux partiels repérés en 14 et 15. Le flux 14 comportant essentiellement des plaquettes compactées est recyclé à l'entrée 3 de la presse 1 par un moyen de transport 16 relié à la ligne 6 précédemment citée. L'autre partie ou flux 15 de la matière sortant du premier système répartiteur 13 alimente un deuxième système répartiteur 17 divisant le flux de produit broyé et partiellement aggloméré d'une part en éléments grossiers sortant par la ligne 18 communiquant avec le moyen de transport 16, et d'autre part en produits fins sortant par la ligne 19.Downstream of the press 1 with rollers 2, the crushed and agglomerated product forms a stream 12 passing through a first distributor system 13 dividing the material into two partial streams marked at 14 and 15. The stream 14 essentially comprising compacted plates is recycled to the input 3 of the press 1 by a means of transport 16 connected to the line 6 previously mentioned. The other part or flow 15 of the material leaving the first system distributor 13 feeds a second distributor system 17 dividing the flow of crushed and partially agglomerated product on the one hand into coarse elements leaving through line 18 communicating with the means of transport 16, and on the other hand into fine products leaving through line 19 .

Bien que cela ne soit pas représenté, la ligne 19 pourrait aboutir directement au transporteur 20 recyclant les produits fins vers l'entrée du séparateur pneumatique 8 via la ligne 9 mentionnée précédemment.Although this is not shown, line 19 could lead directly to the conveyor 20 recycling the fine products to the inlet of the pneumatic separator 8 via the line 9 mentioned above.

La conduite 11 de sortie du séparateur 8 est équipée d'un troisième système répartiteur 21 dont la sortie est raccordée d'une part à la ligne 7 aboutissant à l'entrée 3 de la presse 1, et d'autre part, bien que cela ne soit pas représenté, à la sortie 19 du deuxième système répartiteur 17, via un conduit ou analogue 22, dans le but de recycler directement le produit grenu à l'alimentation du séparateur 8.The separator 8 outlet pipe 11 is equipped with a third distributor system 21, the outlet of which is connected on the one hand to the line 7 leading to the inlet 3 of the press 1, and on the other hand, although this is not shown, at the outlet 19 of the second distributor system 17, via a conduit or the like 22, for the purpose of directly recycling the grainy product to the feed of the separator 8.

Selon la réalisation représentée, l'installation comporte un équipement complémentaire de broyage montré schématiquement en 23 qui peut être constitué par un broyeur à boulets, à barres, vibrant, à impact ou analogue.According to the embodiment shown, the installation comprises additional grinding equipment shown diagrammatically at 23 which may be constituted by a ball, bar, vibrating, impact or similar mill.

En outre, la sortie 19 peut être équipée d'un volet de répartition 24 des produits finis sortant du deuxième système répartiteur 17.In addition, the outlet 19 can be equipped with a distribution flap 24 for the finished products leaving the second distribution system 17.

Le volet de répartition 24 subdivise la matière qui y parvient en deux lignes, à savoir une ligne 25 aboutissant au broyeur 23 et une ligne 26 aboutissant au transporteur 20, lequel reçoit également les produits broyés extraits du broyeur 23 par la ligne 27.The distribution flap 24 subdivides the material which reaches it into two lines, namely a line 25 terminating in the crusher 23 and a line 26 terminating in the conveyor 20, which also receives the ground products extracted from the crusher 23 by the line 27.

En outre, on voit sur la figure que le conduit 22, au lieu d'être directement raccordé à la sortie 19 du deuxième système répartiteur 17, est ici raccordé à l'entrée du broyeur 23, lequel peut comporter une ventilation qui peut être utilisée pour extraire au moins une partie du produit broyé.In addition, it can be seen in the figure that the duct 22, instead of being directly connected to the outlet 19 of the second distributor system 17, is here connected to the inlet of the crusher 23, which may include ventilation which can be used to extract at least part of the ground product.

Le fonctionnement de l'installation se déduit immédiatement de la description qui précède, mais, il convient d'insister ici sur un certain nombre de points.The operation of the installation is immediately deduced from the above description, but it is worth emphasizing here a certain number of points.

La densité en vrac ou du mélange des diverses formes de la matière alimentée à l'entrée 3 de la presse à rouleaux 1 par les lignes 5, 6 et 7 sera modulée de telle façon qu'elle se situe dans un intervalle permettant un fonctionnement stable de la presse, et cela essentiellement en modulant la proportion de plaquettes recyclées dans la ligne 6, par actionnement du premier système répartiteur 13. En outre, comme on le comprend, la densité en vrac précité sera avantageusement modulée aussi en agissant sur le troisième système répartiteur 21 pour moduler la proportion de produits grenus passant dans la ligne 7. Enfin, le deuxième système répartiteur 17 intervient lui aussi pour la régulation de la densité en vrac des produits alimentant la presse 1 puisque, comme on le comprend, il joue un rôle pour ce qui est de la quantité de plaquettes sortant du premier système répartiteur 13 et recyclée à l'entrée 3 de la presse 1 via le moyen de transport 16.The density in bulk or of the mixture of the various forms of the material fed to the inlet 3 of the roller press 1 by the lines 5, 6 and 7 will be modulated in such a way that it lies within a range allowing stable operation. of the press, and this essentially by modulating the proportion of recycled platelets in line 6, by actuation of the first distributor system 13. In addition, as can be understood, the above-mentioned bulk density will also be advantageously modulated by acting on the third system distributor 21 to modulate the proportion of granular products passing through line 7. Finally, the second distributor system 17 also intervenes for the regulation of the bulk density of the products feeding press 1 since, as we understand, it plays a role as regards the quantity of plates leaving the first distributor system 13 and recycled at the inlet 3 of the press 1 via the transport means 16.

On observera ici que le deuxième système répartiteur 17 ou le premier système répartiteur 13 peut être constitué par un crible, un tamis ou analogue.It will be observed here that the second distributor system 17 or the first distributor system 13 can be constituted by a screen, a sieve or the like.

Pour assurer un fonctionnement stable de l'installation et pour stabiliser ainsi la consommation énergétique instantanée nécessaire au broyage-compactage, la densité en vrac de la matière alimentant la presse à rouleaux devra avoir, suivant une caractéristique essentielle de cette invention, une valeur comprise entre 0,60 Dp et 0,90 Dp, Dp étant la densité du produit aggloméré ou compacté sortant de la presse.To ensure stable operation of the installation and to thereby stabilize the instantaneous energy consumption necessary for grinding-compaction, the bulk density of the material feeding the roller press should have, according to an essential characteristic of this invention, a value between 0.60 D p and 0.90 D p , D p being the density of the agglomerated or compacted product leaving the press.

La densité de la matière alimentant la presse sera de préférence comprise entre 0,68 et 0,85 Dp étant entendu que la régulation de la densité conférant à la presse une excellente stabilité de fonctionnement pourra être réalisée de toute manière appropriée.The density of the material feeding the press will preferably be between 0.68 and 0.85 D p, it being understood that the regulation of the density giving the press excellent operating stability can be carried out in any suitable manner.

A cet égard, l'appareil de mesure de la densité 4 situé à l'entrée 3 de la presse 1 permettra avantageusement et à chaque instant le contrôle de la densité des produits alimentant ladite presse, cet appareil pouvant éventuellement agir automatiquement sur les systèmes répartiteurs 13 et 21.In this regard, the density measuring device 4 located at the inlet 3 of the press 1 will advantageously and at all times allow the density of the products feeding said press to be controlled, this device possibly being able to act automatically on the distributing systems 13 and 21.

Bien entendu, l'invention n'est nullement limitée au mode de réalisation décrit et illustré qui n'a été donné qu'à titre d'exemple.Of course, the invention is in no way limited to the embodiment described and illustrated, which has been given only by way of example.

Claims (6)

  1. Method of pounding and compacting any raw mineral material such for example as cement clinker and of the type consisting in preconditioning this material before pounding it through crushing in a roller press, characterized in that one causes a mixture of the said raw mineral material (5) with a recycled agglomerated or compacted product (6) and with a recycled granular or powdery product (7) to pass into the said press (1) with rollers (2), one fractionates the product issuing from the roller press into an agglomerated or compacted product (14), into a granular or powdery product (11) and into a fine product (10) which is discharged and one recycles to the said roller press at least one part of the agglomerated or compacted product (14,16,6) and at least one,part of the granular or powdery product (11) to constitute a preconditioned mixture conveyed to the said roller press and one control the density in bulk of the products feeding the press by modulating the proportion of recycled agglomerated product (6) and the proportion of recycled granular product (7) in order that the said density in bulk of the products feeding the roller press be kept at a value comprised between 0.68 Dp and 0.85 Dp, Dp being the density of the agglomerated or compacted product issuing from the press in order to ensure a stable operation of the latter and therefore to stabilize the instantaneous consumption of energy necessary to the crushing.
  2. Method according to claim 1, characterized in that for the crushing of cement, the density in bulk at the feed of the press is adjusted between 1.7 and 2.05.
  3. Pounding and compacting equipment for carrying out the method according to claim 1 or 2 and of the type comprising a press (1) with rollers (2) permitting the crushing and the partial agglomeration of any mineral material, means for passing the said mineral material into the said press and downstream of this press a conveyor means (16) associated with a first distributing system (13), and permitting the recycling of one portion (14) of the crushed and partially agglomerated material towards the feed (3) of the press (1), characterized in that it comprises a second distributing system (17) fed with the other portion (15) of the material issuing from the first distributing system (13), the said second distributing system (17) having a first outlet (18) and a second outlet (19), the first outlet (18) communicating with the said conveyor means (16) to thus adjust the amount and the density of the crushed and partially agglomerated material recycled towards the feed (3) of the roller press and the second outlet (19) communicating with a separator (8) to separate fine product (10) from a granular or powdery product (11) travelling through a pipeline (7) towards the feed (3) of the roller press and in that it moreover comprises an apparatus (4) for the measurement of the density of the material feeding the press (1), located at the inlet (3) of the said press.
  4. Equipment according to claim 3, characterized in that one of the aforesaid two distributing system (13,17) is a riddle screen or a sieve.
  5. Equipment according to claim 3 or 4, characterized in that it is fitted moreover with a third distributor (21) for the granular or powdery product a first outlet of which is connected by the pipeline (7) to the inlet (3) of the roller press (1) and a second outlet (22) of which is connected to the second outlet (19) of the aforesaid second distributor system (17).
  6. Equipment according to claim 5, characterized in that it further comprises means allowing the apparatus (4) for the measurement of the density of the material feeding the press to act automatically upon the first distributor system (13) and the third distributor system (21) so as to permit the control of the density of the products feeding the said press.
EP89402066A 1988-07-22 1989-07-20 Process for grinding and compacting any kind of ore and apparatus for carrying out this process Expired - Lifetime EP0352192B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402066T ATE99563T1 (en) 1988-07-22 1989-07-20 PROCESS FOR CRUSHING AND COMPACTION OF ANY MINERAL MATERIAL AND APPARATUS FOR PERFORMING SUCH PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8809975A FR2634402B1 (en) 1988-07-22 1988-07-22 PROCESS OF CRUSHING AND COMPACTION OF ANY MINERAL MATERIAL AND PLANT FOR CARRYING OUT SAID METHOD
FR8809975 1988-07-22

Publications (2)

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EP0352192A1 EP0352192A1 (en) 1990-01-24
EP0352192B1 true EP0352192B1 (en) 1994-01-05

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US (1) US4976469A (en)
EP (1) EP0352192B1 (en)
JP (1) JP2665381B2 (en)
AT (1) ATE99563T1 (en)
CA (1) CA1316515C (en)
DE (1) DE68912012T2 (en)
ES (1) ES2049835T3 (en)
FR (1) FR2634402B1 (en)

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Publication number Priority date Publication date Assignee Title
CN107597390A (en) * 2017-10-19 2018-01-19 湖州城区天顺化工厂 A kind of chemical products crush and the transport all-in-one of garbage disposal
WO2021008003A1 (en) * 2019-07-18 2021-01-21 江苏新业重工股份有限公司 Powder roller press capable of thoroughly crushing

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DE4005323A1 (en) * 1990-02-20 1991-08-22 Krupp Polysius Ag Crushing plant for cement material - involves first stage accepting pre-crushed material, and feeding to second stage with constant output regulation
DE4029202A1 (en) * 1990-09-14 1992-03-19 Buehler Ag METHOD FOR SORTING PARTICLES OF A BULK GOOD AND DEVICES THEREFOR
EP0476209A1 (en) * 1990-09-21 1992-03-25 Minas De Almaden Y Arrayanes, Sa Process for enrichment of heterogeneous ores
FR2670135B1 (en) * 1990-12-06 1993-03-26 Cle PROCESS FOR CRUSHING BROKEN MATERIAL COMPRISING SELECTIVE DEAGGLOMERATION AND INSTALLATION FOR THE IMPLEMENTATION OF THE PROCESS.
JPH089016B2 (en) * 1991-05-14 1996-01-31 川崎重工業株式会社 Grinding device and grinding method by vertical roller mill
DK101792A (en) * 1992-08-17 1994-02-18 Smidth & Co As F L Process for milling material
DE4337215A1 (en) * 1993-10-30 1995-05-04 Kloeckner Humboldt Deutz Ag Circulating grinding plant
US5644181A (en) * 1995-01-05 1997-07-01 Dayton-Phoenix Group, Inc. Stator lamination design having a tapered opening
DE19528736A1 (en) * 1995-08-04 1997-02-06 Krupp Polysius Ag Arraangement for making mixture of ground material and water - in which material is ground in one stage and water added while grain size and viscosity of mixture are constantly monitored
JP2920876B2 (en) * 1996-04-18 1999-07-19 川崎重工業株式会社 Apparatus and method for crushing cement clinker by vertical roller mill
US6193176B1 (en) * 1997-02-18 2001-02-27 Kawasaki Jukogyo Kabushiki Kaisha Cement clinker grinding method using vertical roller mill and apparatus
DE19757431A1 (en) * 1997-12-23 1999-06-24 Kloeckner Humboldt Wedag Method for milling chopped grain with twin high pressure rollers and sieve by recirculating the granules
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CN112264172A (en) * 2020-09-24 2021-01-26 酒泉钢铁(集团)有限责任公司 Process for producing iron ore concentrate by grading, dry grinding and dry separation of low-grade magnetite

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WO2021008003A1 (en) * 2019-07-18 2021-01-21 江苏新业重工股份有限公司 Powder roller press capable of thoroughly crushing

Also Published As

Publication number Publication date
DE68912012T2 (en) 1994-05-19
FR2634402B1 (en) 1992-04-03
JPH0372963A (en) 1991-03-28
ATE99563T1 (en) 1994-01-15
JP2665381B2 (en) 1997-10-22
ES2049835T3 (en) 1994-05-01
DE68912012D1 (en) 1994-02-17
FR2634402A1 (en) 1990-01-26
US4976469A (en) 1990-12-11
CA1316515C (en) 1993-04-20
EP0352192A1 (en) 1990-01-24

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