EP0133937A1 - Process for descaling loops - Google Patents

Process for descaling loops Download PDF

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Publication number
EP0133937A1
EP0133937A1 EP84108428A EP84108428A EP0133937A1 EP 0133937 A1 EP0133937 A1 EP 0133937A1 EP 84108428 A EP84108428 A EP 84108428A EP 84108428 A EP84108428 A EP 84108428A EP 0133937 A1 EP0133937 A1 EP 0133937A1
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EP
European Patent Office
Prior art keywords
descaling agent
descaling
mixture
alkali
dry
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.)
Ceased
Application number
EP84108428A
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German (de)
French (fr)
Inventor
Jacques Dr. Périard
Alain Dr. Cron
Michel Bonifay
Hansjörg Furrer
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Lonza AG
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Lonza AG
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Filing date
Publication date
Application filed by Lonza AG filed Critical Lonza AG
Publication of EP0133937A1 publication Critical patent/EP0133937A1/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents

Definitions

  • the object of the present invention was to propose a method which enables descaling to be carried out continuously and as completely as possible in the workflow of a rolling mill.
  • the essential device elements for carrying out the method are a storage container for holding a dry one or liquid mixture of the descaling agent.
  • the mixture is fed into a suitable device, for example a jet pump, to the exit of which helicoidal blades are attached, in which an intimate mixture with a gas is made.
  • a suitable device for example a jet pump
  • the dosing process is controlled in such a way that 50 to 200 g of descaling agent are expediently used per m2 of surface inside the hollow or hollow block.
  • the descaling agent / gas mixture is then introduced into the billet, which is at a rolling temperature of 1100 to 1250 ° C., in such a way that the stream of material flows from one end to the other in a spiral through the inside of the billet.
  • the descaling agent is able to chemically descale the inner surface of the plate.
  • a dust separator can be attached to the discharge end. Electrostatic dust separators, filter bags, cyclones or wind sifters are used for this purpose.
  • the material discharge at the end of the slug is reinforced by a suction device. If a dust separation device is used, the suction is expediently carried out after the dust separation. Blowers, vacuum pumps or fans are used as suction devices.
  • the suction system is advantageous Pipe / cyclone / filter / fan, whereby the cyclone has the task of dust separation, the filter is installed for environmental reasons and the fan generates the necessary negative pressure.
  • the suction device has the task of supporting the transport of the descaling agent / gas mixture.
  • the descaling agent mixed with the gas is usually fed in at approximately ambient temperature.
  • the gas heats up very quickly and very strongly in the bail, which is up to 1250 ° C, and there is a risk of it striking back. Therefore, in order to achieve a rapid and even spiral flow of the media, the support is provided by a trigger system.
  • a slight negative pressure should preferably prevail inside the pan.
  • the constituents of the mixture that do not participate in the descaling reactions can be retained in the separator and fed back to the mixture input system.
  • a thorn-like insert can be inserted into the bowl.
  • the mandrel insert should form an annular gap of approximately 20 to 50 mm with the inner cap delimitation.
  • the mandrel insert can extend over the entire length of the tube extend or include only a partial length, in the latter case the mandrel insert is moved with the input of the descaling agent and its movement inside the pan.
  • the surface of the mandrel insert can have a thread or spiral surface structure.
  • Suitable gases for taking up and transporting the descaling agent are nitrogen, noble gases, optionally water vapor and preferably air. These gases must also be used as dry as possible when using a dry mixture.
  • descaling may be used: compounds containing alkali metal, borates, phosphates or S ILI Kate, or compounds containing alkali and ein.Borat, alkali and a phosphate or an alkali and a silicate, or further mixtures of these compounds.
  • the dry mixture of the descaling agent can be used in powder or granular form, with an average diameter of 50 to 1000 micrometers.
  • a solid lubricant can also be added to the descaling agents.
  • Suitable lubricants for this purpose are the known high-temperature lubricants. such as metal oxides, metals, metal soaps, boron nitrides, glasses, MoS 2 , KCl, polymers such as polyimides or polycarbonates, polyethylene, polypropylene and preferably graphite. Mixtures of selected solid lubricants are also suitable.
  • the amount of solid lubricant in the descaling agent can be 3 to 35% by weight.
  • the descaling agent possibly in a mixture with the solid lubricant, is largely deposited on the inner surface of the holes.
  • the reaction products of scale and descaling agent and any solid lubricant can then develop their intended effect in a subsequent rolling process, during which the mandrel bar and possibly the rolling plug are driven through the hollow block.
  • the existing scale layer can be modified in such a way that a uniformly thick and adhesive surface layer is obtained.
  • the use of the descaling agent not only provides a uniform and well-adhering thin surface layer, but the products which form on the inner surface of the blank ideally have lubricating properties.
  • the blanks, hollow blocks or pipes to be coated on the inside with the descaling agent generally have an outer diameter of 60 to 500 mm and a length of up to 8 m, normally 6 to 8 m.
  • the drawing schematically represents an embodiment of the invention.
  • 1 denotes the pipe to be descaled
  • 2 represents the dosing device
  • 3 represents the injector responsible for the spiral material flow.
  • the connecting part 4 essentially represents the positive connection between the pipe 1 and the separator 5 and the filter 6 connected to it.
  • the material flow is supported by the blower 7.

Abstract

In hollow blanks for the manufacture of seamless tubes, the descaling agent is introduced as a mixture in the dry or liquid form by means of a compressed gas in circular motion at one end into the interior of the blank and discharged at the other end thereof by removing the residual mixture advancing spirally on the inner wall by suction.

Description

Verfahren zur Entzunderung von Luppen, wie sie für die Herstellung von nahtlosen Rohren verwendet werden.Descaling processes for blanks used in the manufacture of seamless tubes.

Es ist bekannt, Metalloberflächen und insbesondere Stahloberflächen vor einer Umformung zu entzundern. Eine Möglichkeit der Entzunderung ist die Oberflächenbehandlung mit Säuren, Säuregemischen, Alkalien oder Salzgemischen.It is known to descale metal surfaces and in particular steel surfaces before forming. One way of descaling is to treat the surface with acids, acid mixtures, alkalis or salt mixtures.

Beispielsweise bei der Verarbeitung von Luppen zu nahtlosen Rohren in Stopfenwalzwerken, Pilgerstrassen, Kontistrassen, Multiple Pipe Mills usw. muss vor dem Einführen der Dornstange das Luppen- oder Hohlblockinnere entzundert werden. Durch die Komplexität des Arbeitsablaufes in Walzwerken der genannten Art war es bisher nicht möglich, auf rationelle Weise eine vollständige Entzunderung zu erreichen.For example, when processing slugs into seamless tubes in plug rolling mills, pilgrim routes, continuous routes, multiple pipe mills etc., the inside of the block or hollow block must be descaled before the mandrel rod is inserted. Due to the complexity of the workflow in rolling mills of the type mentioned, it was previously not possible to achieve complete descaling in a rational manner.

Aufgabe vorliegender Erfindung war es, ein Verfahren vorzuschlagen, das es ermöglicht, im Arbeitsablauf eines Walzwerkes die Entzunderung kontinuierlich und möglichst vollständig vorzunehmen.The object of the present invention was to propose a method which enables descaling to be carried out continuously and as completely as possible in the workflow of a rolling mill.

Erfindungsgemäss wird das mit einem Verfahren nach Patentanspruch 1 erreicht.According to the invention this is achieved with a method according to claim 1.

Die wesentlichen Vorrichtungselemente zur Ausführung des Verfahrens sind ein Vorratsbehälter zur Aufnahme eines trockenen oder flüssigen Gemisches des Entzunderungsmittels.The essential device elements for carrying out the method are a storage container for holding a dry one or liquid mixture of the descaling agent.

Durch eine Zuteilvorrichtung, beispielsweise einen Pulverdosierapparat, wie eine Dosierschnecke, Dosierspirale, Dosierwaage, Schwingaufgeber oder Dosierband, wird das Gemisch in eine geeignete Vorrichtung, beispielsweise eine Strahlpumpe, an deren Ausgang helicoidale Schaufeln angebracht sind, eingespiesen, in der eine innige Mischung mit einem Gas vorgenommen wird.The mixture is fed into a suitable device, for example a jet pump, to the exit of which helicoidal blades are attached, in which an intimate mixture with a gas is made.

Der Dosiervorgang wird so gesteuert, dass pro m2 Oberfläche im Innern der Luppe oder des Hohlblocks zweckmässig 50 bis 200 g Entzunderungsmittel zur Anwendung gelangen.The dosing process is controlled in such a way that 50 to 200 g of descaling agent are expediently used per m2 of surface inside the hollow or hollow block.

Das Entzunderungsmittel/Gasgemisch wird dann so in die auf Walztemperatur von 1100 bis 1250°C befindliche Luppe eingeführt, dass der Materialstrom spiralförmig von einem zum andern Ende durch das Innere der Luppe strömt. Das Entzunderungsmittel vermag dabei die innere Oberfläche der Luppe auf chemischem Weg zu entzundern.The descaling agent / gas mixture is then introduced into the billet, which is at a rolling temperature of 1100 to 1250 ° C., in such a way that the stream of material flows from one end to the other in a spiral through the inside of the billet. The descaling agent is able to chemically descale the inner surface of the plate.

Am austragsseitigen Luppenende kann eine Staubabscheidevorrichtung angebracht werden. Dazu dienen beispielsweise elektrostatische Staubabscheider, Filtersäcke, Zyklone oder Windsichter.A dust separator can be attached to the discharge end. Electrostatic dust separators, filter bags, cyclones or wind sifters are used for this purpose.

Der Materialaustrag am Luppenende wird durch eine Absaugvorrichtung verstärkt. Wird eine Staubabscheidevorrichtung angewendet, erfolgt die Absaugung zweckmässig nach der Staubscheidung. Als Absaugvorrichtung kommen Gebläse, Vakuumpumpen oder Ventilatoren "ur Anwendung. Vorteilhaft ist das System Saugrohr/Zyklon/Filter/Ventilator, wobei dem Zyklon die Aufgabe der Staubabscheidung zukommt, der Filter aus Umweltschutzgründen installiert wird und der Ventilator den notwendigen Unterdruck erzeugt.The material discharge at the end of the slug is reinforced by a suction device. If a dust separation device is used, the suction is expediently carried out after the dust separation. Blowers, vacuum pumps or fans are used as suction devices. The suction system is advantageous Pipe / cyclone / filter / fan, whereby the cyclone has the task of dust separation, the filter is installed for environmental reasons and the fan generates the necessary negative pressure.

Die Absaugvorrichtung hat die Aufgabe, den Transport des Entzunderungsmittel/Gasgemisches zu unterstützen. Das Entzunderungsmittel im Gemisch mit dem Gas wird in der Regel bei ungefähr Umgebungstemperatur eingespiesen. In der bis zu 1250°C heissen Luppe erwärmt sich das Gas sehr rasch und sehr stark, wobei die Gefahr des Zurückschlagens besteht. Daher, um eine rasche und gleichmässige spiralförmige Strömung der Medien zu erreichen, erfolgt die Unterstützung durch ein Abzugssystem. Vorzugsweise soll im Luppeninneren ein leichter Unterdruck herrschen. Die Bestandteile des Gemisches, die nicht an den Entzunderungsreaktionen teilnehmen, können in der Abscheidevorrichtung zurückgehalten und wieder dem Gemischeingabesystem zugeführt werden.The suction device has the task of supporting the transport of the descaling agent / gas mixture. The descaling agent mixed with the gas is usually fed in at approximately ambient temperature. The gas heats up very quickly and very strongly in the bail, which is up to 1250 ° C, and there is a risk of it striking back. Therefore, in order to achieve a rapid and even spiral flow of the media, the support is provided by a trigger system. A slight negative pressure should preferably prevail inside the pan. The constituents of the mixture that do not participate in the descaling reactions can be retained in the separator and fed back to the mixture input system.

Es ist auch möglich, das Entzunderungsmittel im Kreislauf zu führen und nur die aufgebrauchten Bestandteile ergänzend zuzudosieren.It is also possible to circulate the descaling agent and only add the used components in addition.

Zur Unterstützung des sich spiralförmig vorwärzsbewegenden Gemisches des Entzunderungsmittels kann in die Luppe ein dorn- ähnlicher Einsatz eingeführt werden. Der Dorneinsatz soll einen Ringspalt von etwa 20 bis 50 mm mit der inneren Luppenbegrenzung bilden. Der Dorneinsatz kann sich über die ganze Rohrlänge erstrecken oder nur eine Teillänge umfassen, wobei in letzterem Fall der Dorneinsatz mit der Eingabe des Entzunderungsmittels und dessen Bewegung im Luppeninneren mitbewegt wird. Die Oberfläche des Dorneinsatzes kann der Strömung entsprechend eine gewinde- oder spiralförmige Oberflächenstruktur aufweisen.To support the spiral of the descaling agent, which moves in a spiral, a thorn-like insert can be inserted into the bowl. The mandrel insert should form an annular gap of approximately 20 to 50 mm with the inner cap delimitation. The mandrel insert can extend over the entire length of the tube extend or include only a partial length, in the latter case the mandrel insert is moved with the input of the descaling agent and its movement inside the pan. Depending on the flow, the surface of the mandrel insert can have a thread or spiral surface structure.

Geeignete Gase zur Aufnahme und zum Transport des Entzunderungsmittels sind Stickstoff, Edelgase, gegebenenfalls Wasserdampf und vorzugsweise Luft. Diese Gase müssen bei der Anwendung eines trockenen Gemisches ebenfalls möglichst trocken angewendet werden.Suitable gases for taking up and transporting the descaling agent are nitrogen, noble gases, optionally water vapor and preferably air. These gases must also be used as dry as possible when using a dry mixture.

Als Entzunderungsmittel können zur Anwendung kommen: Verbindungen enthaltend Alkali, Borate, Phosphate oder Sili- kate, oder Verbindungen enthaltend Alkali und ein.Borat, Alkali und ein Phosphat oder Alkali und ein Silikat, oder ferner Gemische dieser Verbindungen.As descaling may be used: compounds containing alkali metal, borates, phosphates or S ILI Kate, or compounds containing alkali and ein.Borat, alkali and a phosphate or an alkali and a silicate, or further mixtures of these compounds.

Das trockene Gemisch des Entzunderungsmittels kann pulver- oder granulatförmig, mit einem mittleren Durchmesser von 50 bis 1000 Mikrometer, angewendet werden.The dry mixture of the descaling agent can be used in powder or granular form, with an average diameter of 50 to 1000 micrometers.

Den Entzunderungsmitteln kann zusätzlich ein Festschmierstoff beigemischt werden. Geeignete Schmierstoffe für diesen Zweck sind die bekannten Hochtemperaturschmiermittel,. wie Metalloxide, Metalle, Metallseifen, Bornitride, Gläser, MoS2,KCl, Polymere, wie Polyimide oder Polycarbonate, Polyäthylen, Polypropylen und vorzugsweise Graphit. Gemische ausgewählter Festschmierstoffe sind ebenfalls geeignet.A solid lubricant can also be added to the descaling agents. Suitable lubricants for this purpose are the known high-temperature lubricants. such as metal oxides, metals, metal soaps, boron nitrides, glasses, MoS 2 , KCl, polymers such as polyimides or polycarbonates, polyethylene, polypropylene and preferably graphite. Mixtures of selected solid lubricants are also suitable.

Die Menge des Festschmierstoffes im Entzunderungsmittel kann 3 bis 35 Gew.% betragen.The amount of solid lubricant in the descaling agent can be 3 to 35% by weight.

Das Entzunderungsmittel, gegebenenfalls im Gemisch mit dem Festschmierstoff, lagert sich weitgehend an der inneren Oberfläche der Luppen ab. Die Reaktionsprodukte aus Zunder und Entzunderungsmittel und dem allfälligen Festschmierstoff können dann bei einem nachfolgenden Walzvorgang, während dem die Dornstange und allenfalls der Walzstopfen durch den Hohlblock getrieben wird, die ihnen zugedachte Wirkung entfalten.The descaling agent, possibly in a mixture with the solid lubricant, is largely deposited on the inner surface of the holes. The reaction products of scale and descaling agent and any solid lubricant can then develop their intended effect in a subsequent rolling process, during which the mandrel bar and possibly the rolling plug are driven through the hollow block.

Mit dem Verfahren nach vorliegender Erfindung gelingt es, die vorhandene Zunderschicht so zu modifizieren, dass eine gleichmässig dicke und haftende Oberflächenschicht erhalten wird. Idealerweise wird durch die Verwendung des Entzunderungsmittels nicht nur eine gleichmässige und gut haftende dünne Oberflächenschicht erhalten, sondern die sich bildenden Produkte auf der inneren Oberfläche der Luppe haben idealerweise schmierende Eigenschaften.With the method according to the present invention, the existing scale layer can be modified in such a way that a uniformly thick and adhesive surface layer is obtained. Ideally, the use of the descaling agent not only provides a uniform and well-adhering thin surface layer, but the products which form on the inner surface of the blank ideally have lubricating properties.

Die innen mit dem Entzunderungsmittel zu beschichtenden Luppen, Hohlblöcke oder Rohre haben in der Regel einen äusseren Durchmesser von 60 bis 500 mm und eine Länge von bis zu 8 m, normalerweise von 6 bis 8 m.The blanks, hollow blocks or pipes to be coated on the inside with the descaling agent generally have an outer diameter of 60 to 500 mm and a length of up to 8 m, normally 6 to 8 m.

Die Zeichnung stellt schematisch eine Ausführungsform der Erfindung dar. Mit 1 ist das zu entzundernde Rohr bezeichnet, 2 stellt die Dosiervorrichtung und 3 den für die spiralförmige Materialströmung zuständigen Injektor dar. Der Verbindungsteil 4 stellt im wesentlichen die formschlüssige Verbindung zwischen dem Rohr 1 und dem Abscheider 5 und dem daran anschliessenden Filter 6 dar. Der Materialstrom wird durch das Gebläse 7 unterstützt.The drawing schematically represents an embodiment of the invention. 1 denotes the pipe to be descaled, 2 represents the dosing device and 3 represents the injector responsible for the spiral material flow. The connecting part 4 essentially represents the positive connection between the pipe 1 and the separator 5 and the filter 6 connected to it. The material flow is supported by the blower 7.

Claims (7)

1. Verfahren zur Entzunderung von Luppen, die für die Herstellung von nahtlosen Rohren verwendet werden, dadurch gekennzeichnet, daß ein Entzunderungsmittel als Gemisch in trockener oder flüssiger Form mittels eines Druckgases in zirkulärer Bewegung an einem Ende in das Innere der auf Walztemperatur erhitzten Luppe eingeführt und am anderen Ende der Luppe durch Absaugen des sich an der Innenwand spiralförmig vorwärts bewegenden Restgemisches ausgetragen wird.1. A process for descaling blanks used for the production of seamless tubes, characterized in that a descaling agent is introduced as a mixture in dry or liquid form by means of a compressed gas in circular motion at one end into the interior of the blanks heated to the rolling temperature and is discharged at the other end of the slug by suctioning off the residual mixture which moves spirally forward on the inner wall. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die zirkuläre Bewegung des Entzunderungsmittels durch einen dornähnlichen Einsatz, der sich über die ganze Rohrlänge erstreckt oder sich über nur eine Teillänge des Rohres erstreckt und mit dem Entzunderungsmittel mitbewegt, unterstützt wird.2. The method according to claim 1, characterized in that the circular movement of the descaling agent is supported by a mandrel-like insert that extends over the entire length of the tube or extends over only a partial length of the tube and moves with the descaling agent. 3. Verfahren nach Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Entzunderungsmittel in Form eines trockenen, pulver- bis granulatförmigen Gemisches mit einer mittleren Kerndurchmesser von 50 bis 1000 Mikrometer angewendet wird.3. Process according to claims 1 and 2, characterized in that the descaling agent is used in the form of a dry, powder to granular mixture with an average core diameter of 50 to 1000 microns. 4. Verfahren nach Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß pro m2 Oberfläche im Inneren der Luppe oder des Hohlblockes 50 bis 200 g Entzunderungsmittel angewendet werden.4. Process according to Claims 1 to 3, characterized in that 50 to 200 g of descaling agent are used per m 2 of surface in the interior of the hollow or the hollow block. 5. Verfahren nach Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß das Entzunderungsmittel 3 bis 35 Gew.-% eines Festschmierstoffes enthält.5. The method according to claims 1 to 4, characterized in that the descaling agent contains 3 to 35 wt .-% of a solid lubricant. 6. Verfahren nach Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß das Entzunderungsmittel Verbindungen, enthaltend Alkali, Borate, Phosphate.oder Silikate, oder Verbindungen, enthaltend Alkali und ein Borat, Alkali und ein Phosphat oder Alkali und ein Silikat, oder Gemische dieser Verbindungen enthält.6. The method according to claims 1 to 5, characterized in that the descaling agent compounds containing alkali, borates, phosphates or silicates, or compounds containing alkali and a borate, alkali and a phosphate or alkali and a silicate, or mixtures of these compounds contains. 7. Verfahren nach Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß das am Luppenende ausgetragene Material mittels einer Staubabscheidevorrichtung aus dem Gasstrom abgeschieden wird.7. The method according to claims 1 to 6, characterized in that the material discharged at the end of the slag is separated from the gas stream by means of a dust separator.
EP84108428A 1983-08-17 1984-07-17 Process for descaling loops Ceased EP0133937A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH447883A CH655516B (en) 1983-08-17 1983-08-17
CH4478/83 1983-08-17

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EP0133937A1 true EP0133937A1 (en) 1985-03-13

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EP84108428A Ceased EP0133937A1 (en) 1983-08-17 1984-07-17 Process for descaling loops

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EP (1) EP0133937A1 (en)
JP (1) JPS6064720A (en)
KR (1) KR850002112A (en)
BR (1) BR8404107A (en)
CH (1) CH655516B (en)
ES (1) ES8505268A1 (en)
ZA (1) ZA845912B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559690A1 (en) * 1983-02-24 1985-08-23 Dalmine Spa
EP0172366A1 (en) * 1984-07-23 1986-02-26 Lonza Ag Method and apparatus for pickling work pieces for making tubes
EP0250881A1 (en) * 1986-07-03 1988-01-07 Lonza Ag Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process
EP0309945A2 (en) * 1987-09-29 1989-04-05 Lonza Ag Device for applying a descaling agent to the inner surface of a loop
US5016456A (en) * 1988-03-30 1991-05-21 Lonza Ltd. Process for making hollow billets into tubes
US5042209A (en) * 1988-01-19 1991-08-27 Lonza Ltd. Process for charging a carrier gas stream with a free-flowing material and process for operating the device
US5099667A (en) * 1989-06-16 1992-03-31 Lonza Ltd. System for suspending and applying solid lubricants to tools or work pieces
EP1312432A2 (en) * 2001-10-30 2003-05-21 Valiant Corporation Apparatus for cleaning engine block passages
EP1591203A1 (en) * 2004-04-28 2005-11-02 Horst-Dieter Schlick Blasting process for the inner surface of tubes
FR2905290A1 (en) * 2006-09-05 2008-03-07 Renault Sas TREATMENT DEVICE FOR THE GRILLING OF THE INNER SURFACE OF A TUBULAR PIECE
CN102517427A (en) * 2011-12-16 2012-06-27 陕西飞机工业（集团）有限公司 Device and method for reinforcing surfaces of assembly structural member holes
CN102764778A (en) * 2012-06-28 2012-11-07 宝山钢铁股份有限公司 Inner surface and outer surface jet flow descaling system and method for big-diameter metal pipe wall
US8402637B2 (en) 2008-11-04 2013-03-26 Chief Automotive Technologies, Inc. Vehicle fixture with alignment target
CN108085706A (en) * 2016-11-19 2018-05-29 天津欧津汇溢市场调查有限公司 A kind of Building technology service rust removing device for steel tube

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3368834B2 (en) * 1998-07-24 2003-01-20 住友金属工業株式会社 Manufacturing method of seamless steel pipe and seamless steel pipe with excellent inner surface quality
DE102012019025A1 (en) 2012-09-26 2014-03-27 Sms Meer Gmbh Deoxidation of obliquely rolled hollow blocks

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR896379A (en) * 1939-07-17 1945-02-20 Schoeller Bleckmann Stahlwerke Process for the treatment of parts which are to be produced by the rolling pear process to form tubes
DE1427828A1 (en) * 1964-09-09 1968-11-21 Contubind S A Process and plant for the production of seamless metal pipes
DE2928083A1 (en) * 1979-07-12 1981-01-29 Kabel Metallwerke Ghh Heat treatment of drawn copper tubes - where inert gas is circulated through bore of hot tube to remove drawing lubricants without permitting air to enter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR896379A (en) * 1939-07-17 1945-02-20 Schoeller Bleckmann Stahlwerke Process for the treatment of parts which are to be produced by the rolling pear process to form tubes
DE1427828A1 (en) * 1964-09-09 1968-11-21 Contubind S A Process and plant for the production of seamless metal pipes
DE2928083A1 (en) * 1979-07-12 1981-01-29 Kabel Metallwerke Ghh Heat treatment of drawn copper tubes - where inert gas is circulated through bore of hot tube to remove drawing lubricants without permitting air to enter

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559690A1 (en) * 1983-02-24 1985-08-23 Dalmine Spa
EP0172366A1 (en) * 1984-07-23 1986-02-26 Lonza Ag Method and apparatus for pickling work pieces for making tubes
EP0250881A1 (en) * 1986-07-03 1988-01-07 Lonza Ag Process for applying a fluent material to the inner side of a hollow body, and apparatus for carrying out the process
US4790263A (en) * 1986-07-03 1988-12-13 Lonza, Ltd. Process for application of free-flowing material on the inner surface of a tube blank and device for performing the process
EP0309945A2 (en) * 1987-09-29 1989-04-05 Lonza Ag Device for applying a descaling agent to the inner surface of a loop
EP0309945A3 (en) * 1987-09-29 1990-05-30 Lonza Ag Device for applying a descaling agent to the inner surface of a loop
US5042209A (en) * 1988-01-19 1991-08-27 Lonza Ltd. Process for charging a carrier gas stream with a free-flowing material and process for operating the device
US5016456A (en) * 1988-03-30 1991-05-21 Lonza Ltd. Process for making hollow billets into tubes
US5099667A (en) * 1989-06-16 1992-03-31 Lonza Ltd. System for suspending and applying solid lubricants to tools or work pieces
EP1312432A3 (en) * 2001-10-30 2004-05-12 Valiant Corporation Apparatus for cleaning engine block passages
EP1312432A2 (en) * 2001-10-30 2003-05-21 Valiant Corporation Apparatus for cleaning engine block passages
EP1591203A1 (en) * 2004-04-28 2005-11-02 Horst-Dieter Schlick Blasting process for the inner surface of tubes
FR2905290A1 (en) * 2006-09-05 2008-03-07 Renault Sas TREATMENT DEVICE FOR THE GRILLING OF THE INNER SURFACE OF A TUBULAR PIECE
WO2008029039A2 (en) * 2006-09-05 2008-03-13 Renault S.A.S. Treatment device for shot blasting the inner surface of a tubular part
WO2008029039A3 (en) * 2006-09-05 2008-05-02 Renault Sa Treatment device for shot blasting the inner surface of a tubular part
US8402637B2 (en) 2008-11-04 2013-03-26 Chief Automotive Technologies, Inc. Vehicle fixture with alignment target
CN102517427A (en) * 2011-12-16 2012-06-27 陕西飞机工业（集团）有限公司 Device and method for reinforcing surfaces of assembly structural member holes
CN102517427B (en) * 2011-12-16 2013-07-10 陕西飞机工业（集团）有限公司 Device and method for reinforcing surfaces of assembly structural member holes
CN102764778A (en) * 2012-06-28 2012-11-07 宝山钢铁股份有限公司 Inner surface and outer surface jet flow descaling system and method for big-diameter metal pipe wall
CN102764778B (en) * 2012-06-28 2014-12-03 宝山钢铁股份有限公司 Inner surface and outer surface jet flow descaling system and method for big-diameter metal pipe wall
CN108085706A (en) * 2016-11-19 2018-05-29 天津欧津汇溢市场调查有限公司 A kind of Building technology service rust removing device for steel tube

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BR8404107A (en) 1985-07-16
KR850002112A (en) 1985-05-06
CH655516B (en) 1986-04-30
ES534717A0 (en) 1985-05-16
ZA845912B (en) 1985-03-27
ES8505268A1 (en) 1985-05-16
JPS6064720A (en) 1985-04-13

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