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EP0403757A1 - Use of a device for suspending graphite-containing solids - Google Patents

Use of a device for suspending graphite-containing solids Download PDF

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Publication number
EP0403757A1
EP0403757A1 EP90107350A EP90107350A EP0403757A1 EP 0403757 A1 EP0403757 A1 EP 0403757A1 EP 90107350 A EP90107350 A EP 90107350A EP 90107350 A EP90107350 A EP 90107350A EP 0403757 A1 EP0403757 A1 EP 0403757A1
Authority
EP
European Patent Office
Prior art keywords
carrier liquid
inlet
solid lubricant
ring nozzle
dispersing unit
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
EP90107350A
Other languages
German (de)
French (fr)
Other versions
EP0403757B1 (en
Inventor
René Schmitter
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.)
Lonza AG
Original Assignee
Lonza AG
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 Lonza AG filed Critical Lonza AG
Publication of EP0403757A1 publication Critical patent/EP0403757A1/en
Application granted granted Critical
Publication of EP0403757B1 publication Critical patent/EP0403757B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/59—Mixing systems, i.e. flow charts or diagrams

Definitions

  • the invention relates to a new device for suspending solid lubricants, in particular solid lubricants containing graphite and polymer, in a carrier liquid, in particular in water, and the associated suspension method.
  • the object was therefore to develop a device which eliminates the disadvantages mentioned.
  • the object was achieved with a device according to claim 1 and an associated method according to claim 8.
  • the device according to the invention essentially consists of an annular nozzle 3 and a downstream dispersing unit 4.
  • the annular nozzle 3 is advantageously cylindrical in the form of a tube bent against the dispersing unit 4.
  • the inlet for the solid lubricant 8 and the inlet gap for the carrier liquid 9 are arranged on the upper part of the ring nozzle 3.
  • the inlet for the solid lubricant 8 is preferably arranged above the inlet gap for the carrier liquid 9.
  • the mouth of the inlet for the solid lubricant 8 is preferably centered in the middle of the tube, so that the solid lubricant can first be introduced without touching the walls of the ring nozzle 3.
  • the inlet gap for the carrier liquid 9 is adjustable. The amount and the film thickness of the carrier liquid film flowing along the walls of the ring nozzle 3 can thus be influenced.
  • the inlet for the solid lubricant is expediently fed from a storage container 1 via a suitable conveying device 2, for example a screw conveyor.
  • a suitable conveying device 2 for example a screw conveyor.
  • Commercially available devices which are able to exert a high shear force on the solid suspension can be used as the dispersing device 4.
  • An intensive mixer 6, which can make a further contribution to stabilizing the suspension, can be connected immediately downstream of the dispersing unit 4.
  • a conveying device 5, for example a pump, can additionally be installed between the dispersing unit and the intensive mixer 6. With this pump 5, the residence time of the suspension in the intensive mixer 6 is set.
  • Suitable representatives of intensive mixers are, for example, mixers with co-rotating or counter-rotating impeller shafts, agitator ball mills, guide jet mixers or screw mixers.
  • the intensive mixer is followed by a further agitator 7.
  • This can advantageously be provided with a fill level control, which is able to switch the system on or off at a corresponding fill level.
  • the solid lubricant used is expediently those which contain a significant proportion of graphite, polymers and, if appropriate, further additives.
  • Such solid lubricants are e.g. known from CH-PS 596 294 and CH-PS 609 728.
  • Water is suitably used as the carrier liquid, to which suitable additives such as e.g. Wetting agents can be added.
  • suitable additives such as e.g. Wetting agents can be added.
  • the lubricant suspensions produced with the device according to the invention by the method according to the invention are mainly used in the non-cutting hot forming of metals (hot metal forming) for the lubrication of hot tools between 50 and 300 ° C, such as e.g. Mandrels, mandrel bars, rollers and / or workpieces heated to 800 to 1200 ° C, e.g. Pipes, slugs, sheets, used.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lubricants (AREA)
  • Accessories For Mixers (AREA)

Abstract

A novel device for suspending solid lubricants, especially graphite-containing solid lubricants, in a carrier fluid, especially in water, is described. The essential element of the device is a ring nozzle (3) with a downstream dispersing unit (4). <IMAGE>

Description

Die Erfindung betrifft eine neue Vorrichtung zum Suspendieren von Festschmierstoffen, insbesondere von Graphit und Polymer enthaltenden Festschmierstoffen, in einer Trägerflüssigkeit, insbesondere in Wasser, sowie das zugehörige Suspendierverfah­ren.The invention relates to a new device for suspending solid lubricants, in particular solid lubricants containing graphite and polymer, in a carrier liquid, in particular in water, and the associated suspension method.

Aus der EP-A 218 989 ist bekannt, Festschmierstoffe durch die Anordnung einer Kolloidmühle und eines nachfolgenden Intensiv­mischers in einer Trägerflüssigkeit, vornehmlich in Wasser, zu mischen.It is known from EP-A 218 989 to mix solid lubricants by arranging a colloid mill and a subsequent intensive mixer in a carrier liquid, primarily in water.

Es hat sich aber herausgestellt, dass sich mit dieser bekann­ten Vorrichtung keine homogenen Festschmierstoffsuspensionen erhalten lassen. Besonders von Nachteil ist, dass in den ein­zelnen Mischeinrichtungen, vor allem in der Kolloidmühle, Klumpenbildungen auftreten, die einen rationellen Betrieb ver­unmöglichen.However, it has been found that no homogeneous solid lubricant suspensions can be obtained with this known device. It is particularly disadvantageous that lumps occur in the individual mixing devices, especially in the colloid mill, which make efficient operation impossible.

Es bestand daher die Aufgabe, eine Vorrichtung zu entwickeln, die die genannten Nachteile ausschliesst. Die Aufgabe konnte gelöst werden mit einer Vorrichtung nach Patentanspruch 1 und einem dazugehörigen Verfahren nach Patent­anspruch 8.The object was therefore to develop a device which eliminates the disadvantages mentioned. The object was achieved with a device according to claim 1 and an associated method according to claim 8.

Figuren:Characters:

  • Fig.1 zeigt schematisch eine mögliche Suspendiereinheit, beste­hend aus
    • 1 Festschmierstoffvorlage
    • 2 Fördereinrichtung
    • 3 Ringdüse
    • 4 Dispergiereinheit
    • 5 Fördereinheit
    • 6 Intensivmischer
    • 7 Rührwerk
    1 schematically shows a possible suspension unit consisting of
    • 1 solid lubricant supply
    • 2 conveyor
    • 3 ring nozzle
    • 4 dispersing unit
    • 5 conveyor unit
    • 6 intensive mixers
    • 7 agitator
  • Fig.2 zeigt schematisch die Ringdüse 3, zusätzlich enthaltend
    8 Einlass für den Festschmierstoff
    9 Einlassspalt für die Trägerflüssigkeit
    mit M wird jeweils ein Motorantrieb bezeichnet.    2 shows schematically the ring nozzle 3, additionally containing
    8 Solid lubricant inlet
    9 Inlet gap for the carrier liquid
    M denotes a motor drive.

Die erfindungsgemässe Vorrichtung besteht im wesentlichen aus einer Ringdüse 3 und einer nachgeschalteten Dispergiereinheit 4. Die Ringdüse 3 ist vorteilhaft zylindrisch in Form eines gegen die Dispergiereinheit 4 gebogenen Rohres ausgebildet.The device according to the invention essentially consists of an annular nozzle 3 and a downstream dispersing unit 4. The annular nozzle 3 is advantageously cylindrical in the form of a tube bent against the dispersing unit 4.

Am oberen Teil der Ringdüse 3 ist der Einlass für den Fest­schmierstoff 8 sowie der Einlassspalt für die Trägerflüssigkeit 9 angeordnet. Vorzugsweise ist der Einlass für den Festschmier­stoff 8 über dem Einlassspalt für die Trägerflüssigkeit 9 ange­bracht.The inlet for the solid lubricant 8 and the inlet gap for the carrier liquid 9 are arranged on the upper part of the ring nozzle 3. The inlet for the solid lubricant 8 is preferably arranged above the inlet gap for the carrier liquid 9.

Die Mündung des Einlasses für den Festschmierstoff 8 ist bevor­zugt in der Rohrmitte zentriert, damit der Festschmierstoff zunächst ohne Berührung der Wände der Ringdüse 3 eingetragen werden kann.
Der Einlassspalt für die Trägerflüssigkeit 9 ist verstellbar vorgesehen. Die Menge und die Filmdicke des an den Wänden der Ringdüse 3 entlang fliessenden Trägerflüssigkeitfilms kann somit beeinflusst werden.The mouth of the inlet for the solid lubricant 8 is preferably centered in the middle of the tube, so that the solid lubricant can first be introduced without touching the walls of the ring nozzle 3.
The inlet gap for the carrier liquid 9 is adjustable. The amount and the film thickness of the carrier liquid film flowing along the walls of the ring nozzle 3 can thus be influenced.

Der Einlass für den Festschmierstoff wird zweckmässig über eine geeignete Fördereinrichtung 2, z.B. einer Förderschnecke, aus einem Vorratsbehälter 1 gespiesen.
Als Dispergiereinrichtung 4 sind handelsübliche Einrichtungen, die eine hohe Scherkraft auf die Feststoffsuspension auszuüben in der Lage sind, einsetzbar.The inlet for the solid lubricant is expediently fed from a storage container 1 via a suitable conveying device 2, for example a screw conveyor.
Commercially available devices which are able to exert a high shear force on the solid suspension can be used as the dispersing device 4.

Unmittelbar nach der Dispergiereinheit 4 kann ein Intensiv­mischer 6 nachgeschaltet werden, der einen weiteren Beitrag zur Stabilisierung der Suspension leisten kann.
Zwischen Dispergiereinheit und Intensivmischer 6 kann zusätz­lich eine Fördereinrchtung 5, z.B. Pumpe, eingebaut werden. Mit dieser Pumpe 5 wird die Verweilzeit der Suspension im Intensivmischerf 6 eingestellt.
Geeignete Vertreter von Intensivmischern sind z.B. Mischer mit gleich- oder gegenläufigen Rührflügelwellen, Rührwerkkugelmüh­len, Leitstrahlmischer oder Schneckenmischer.An intensive mixer 6, which can make a further contribution to stabilizing the suspension, can be connected immediately downstream of the dispersing unit 4.
A conveying device 5, for example a pump, can additionally be installed between the dispersing unit and the intensive mixer 6. With this pump 5, the residence time of the suspension in the intensive mixer 6 is set.
Suitable representatives of intensive mixers are, for example, mixers with co-rotating or counter-rotating impeller shafts, agitator ball mills, guide jet mixers or screw mixers.

In einer bevorzugten Anordnung wird dem Intensivmischer ein weiteres Rührwerk 7 nachgeschaltet. Dieses kann vorteilhaft mit einer Füllstandsregelung versehen sein, die in der Lage ist, bei entsprechendem Füllstand die Anlage ein- bzw. auszu­schalten.In a preferred arrangement, the intensive mixer is followed by a further agitator 7. This can advantageously be provided with a fill level control, which is able to switch the system on or off at a corresponding fill level.

Das erfindungsgemässe Verfahren wird beschrieben durch Patent­ansprüche 8 bis 10 und ist durch die vorstehend erwähnten Vor­richtungsmerkmale erläutert.The inventive method is described by claims 8 to 10 and is explained by the above-mentioned device features.

Als Festschmierstoff werden zweckmässig solche eingesetzt, die zu einem wesentlichen Anteil Graphit, Polymere und gegebenen­falls weitere Zusätze enthalten. Solche Festschmierstoffe sind z.B. aus der CH-PS 596 294 und der CH-PS 609 728 bekannt.The solid lubricant used is expediently those which contain a significant proportion of graphite, polymers and, if appropriate, further additives. Such solid lubricants are e.g. known from CH-PS 596 294 and CH-PS 609 728.

Als Trägerflüssigkeit wird zweckmässig Wasser eingesetzt, dem gegebenenfalls geeignete Zusätze, wie z.B. Netzmittel, zuge­setzt werden.Water is suitably used as the carrier liquid, to which suitable additives such as e.g. Wetting agents can be added.

Die mit der erfindungsgemässen Einrichtung nach dem erfindungs­gemässen Verfahren hergestellten Schmierstoffsuspensionen wer­den hauptsächlich bei der spanlosen Warmumformung von Metallen (hot metal forming) zum Schmieren der zwischen 50 bis 300°C heissen Werkzeuge, wie z.B. Dorne, Dornstangen, Walzen und/oder 800 bis 1200°C heissen Werkstücke, wie z.B. Rohre, Luppen, Bleche, eingesetzt.The lubricant suspensions produced with the device according to the invention by the method according to the invention are mainly used in the non-cutting hot forming of metals (hot metal forming) for the lubrication of hot tools between 50 and 300 ° C, such as e.g. Mandrels, mandrel bars, rollers and / or workpieces heated to 800 to 1200 ° C, e.g. Pipes, slugs, sheets, used.

Claims (10)

1. Vorrichtung zum Suspendieren von graphithaltigen Fest­schmierstoffen in einer Trägerflüssigkeit, dadurch gekenn­zeichnet, dass sie aus einer Ringdüse (3) und einer nachge­schalteten Dispergiereinheit (4) besteht.1. Device for suspending graphite-containing solid lubricants in a carrier liquid, characterized in that it consists of an annular nozzle (3) and a downstream dispersion unit (4). 2. Vorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, dass der Dispergiereinheit (4) ein Intensivmischer (6) anschliesst.2. Device according to claim 1, characterized in that the dispersing unit (4) is connected to an intensive mixer (6). 3. Vorrichtung nach Patentansprüchen 1 und 2, dadurch gekenn­zeichnet, dass die Ringdüse (3) eine zylindrische, zur Dispergiereinheit (4) hin gebogene Form aufweist und am oberen Teil der Ringdüse einen Einlass für den Festschmier­stoff (8) und einen Einlassspalt für die Trägerflüssigkeit (9) aufweist.3. Device according to claims 1 and 2, characterized in that the ring nozzle (3) has a cylindrical, towards the dispersing unit (4) curved shape and at the upper part of the ring nozzle an inlet for the solid lubricant (8) and an inlet gap for the carrier liquid (9). 4. Vorrichtung nach Patentanspruch 3, dadurch gekennzeichnet, dass der Einlassspalt für die Trägerflüssigkeit (9) ver­stellbar ausgebildet ist.4. Device according to claim 3, characterized in that the inlet gap for the carrier liquid (9) is adjustable. 5. Vorrichtung nach Patentanspruch 3, dadurch gekennzeichnet, dass der Einlass für den Festschmierstoff (8) aus mit einer Fördereinrichtung (2) aus einem Vorratsbehälter (1) gespiesen wird.5. Device according to claim 3, characterized in that the inlet for the solid lubricant (8) is fed from a storage container (1) with a conveyor (2). 6. Vorrichtung nach Patentansprüchen 3 oder 5, dadurch gekenn­zeichnet, dass der Einlass für den Festschmierstoff (8) über dem Einlassspalt für die Trägerflüssigkeit (9) und im Bezug auf den Querschnitt der Ringdüse (3) zentriert ange­ordnet ist.6. Device according to claims 3 or 5, characterized in that the inlet for the solid lubricant (8) above the inlet gap for the carrier liquid (9) and in relation to the cross section of the ring nozzle (3) is arranged centered. 7. Vorrichtung nach Patentanspruch 2, dadurch gekennzeichnet, dass dem Intensivmischer (6) nachfolgend ein Rührwerk (7) angeordnet wird.7. The device according to claim 2, characterized in that the intensive mixer (6) is subsequently arranged an agitator (7). 8. Verfahren zum Suspendieren von graphithaltigen Festschmier­stoffen in einer Trägerflüssigkeit, dadurch gekennzeichnet, dass die Suspendierung in einer Vorrichtung gemäss Patent­ansprüchen 1 bis 7 erfolgt.8. A method for suspending graphite-containing solid lubricants in a carrier liquid, characterized in that the suspension is carried out in a device according to claims 1 to 7. 9. Verfahren nach Patentanspruch 8, dadurch gekennzeichnet, dass der Festschmierstoff über eine Fördereinrichtung (2) über den Einlass für den Festschmierstoff (8) zentral in den oberen Teil der Ringdüse (3) geführt wird, herunter­fällt und vom Trägerflüssigkeitsfilm, der durch den Ein­lassspalt für die Trägerflüssigkeit (9) gebildet wird, am unteren Teil der Ringdüse (3) aufgenommen und der Disper­giereinheit (4) zugeführt wird.9. The method according to claim 8, characterized in that the solid lubricant is fed via a conveyor (2) via the inlet for the solid lubricant (8) centrally into the upper part of the ring nozzle (3), and falls from the carrier liquid film that passes through the inlet gap is formed for the carrier liquid (9), taken up at the lower part of the ring nozzle (3) and fed to the dispersing unit (4). 10. Verfahren nach Patentanspruch 8, dadurch gekennzeichnet, dass als Trägerflüssigkeit Wasser eingesetzt wird.10. The method according to claim 8, characterized in that water is used as the carrier liquid.
EP90107350A 1989-06-16 1990-04-18 Use of a device for suspending graphite-containing solids Expired - Lifetime EP0403757B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2262/89 1989-06-16
CH226289 1989-06-16

Publications (2)

Publication Number Publication Date
EP0403757A1 true EP0403757A1 (en) 1990-12-27
EP0403757B1 EP0403757B1 (en) 1995-06-28

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EP90107350A Expired - Lifetime EP0403757B1 (en) 1989-06-16 1990-04-18 Use of a device for suspending graphite-containing solids

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EP (1) EP0403757B1 (en)
JP (1) JPH0332731A (en)
CN (1) CN1025416C (en)
AR (1) AR247114A1 (en)
AT (1) ATE124291T1 (en)
BR (1) BR9002851A (en)
CA (1) CA2017758A1 (en)
DE (1) DE59009317D1 (en)
ES (1) ES2073474T3 (en)
MX (1) MX171989B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101132641B1 (en) 2010-11-02 2012-04-02 서강대학교산학협력단 Micromixing apparatus for fluid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1493462A (en) * 1974-01-23 1977-11-30 Zucker F Method and apparatus for the preparation of suspensions
EP0029165A2 (en) * 1979-11-09 1981-05-27 Cpc International Inc. Apparatus for the continuous preparation of a starch slurry
EP0050312A2 (en) * 1980-10-20 1982-04-28 Hoechst Aktiengesellschaft Apparatus and process for dispersing and dissolving polymer powders
EP0218989A2 (en) * 1985-10-02 1987-04-22 Lonza Ag Method for suspending solid lubricants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1493462A (en) * 1974-01-23 1977-11-30 Zucker F Method and apparatus for the preparation of suspensions
EP0029165A2 (en) * 1979-11-09 1981-05-27 Cpc International Inc. Apparatus for the continuous preparation of a starch slurry
EP0050312A2 (en) * 1980-10-20 1982-04-28 Hoechst Aktiengesellschaft Apparatus and process for dispersing and dissolving polymer powders
EP0218989A2 (en) * 1985-10-02 1987-04-22 Lonza Ag Method for suspending solid lubricants

Also Published As

Publication number Publication date
JPH0332731A (en) 1991-02-13
AR247114A1 (en) 1994-11-30
CN1025416C (en) 1994-07-13
MX171989B (en) 1993-11-26
CA2017758A1 (en) 1990-12-16
ES2073474T3 (en) 1995-08-16
DE59009317D1 (en) 1995-08-03
ATE124291T1 (en) 1995-07-15
CN1057594A (en) 1992-01-08
EP0403757B1 (en) 1995-06-28
BR9002851A (en) 1991-08-20

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