EP0572780B1 - Verfahren und Vorrichtung zur Reinigung von Metallbandoberflächen durch Gasspülung in wasserstoffreichen Atmosphären - Google Patents

Verfahren und Vorrichtung zur Reinigung von Metallbandoberflächen durch Gasspülung in wasserstoffreichen Atmosphären Download PDF

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Publication number
EP0572780B1
EP0572780B1 EP93105667A EP93105667A EP0572780B1 EP 0572780 B1 EP0572780 B1 EP 0572780B1 EP 93105667 A EP93105667 A EP 93105667A EP 93105667 A EP93105667 A EP 93105667A EP 0572780 B1 EP0572780 B1 EP 0572780B1
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EP
European Patent Office
Prior art keywords
cleaning
strip
temperature
oil
gas
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
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EP93105667A
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German (de)
English (en)
French (fr)
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EP0572780A2 (de
EP0572780A3 (enrdf_load_stackoverflow
Inventor
Jürgen Dr. Dipl.-Ing. Behringer
Wolfgang Dipl.-Ing. Syllwasschy
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EBG Gesellschaft fuer Elektromagnetische Werkstoffe
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EBG Gesellschaft fuer Elektromagnetische Werkstoffe
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Publication of EP0572780A2 publication Critical patent/EP0572780A2/de
Publication of EP0572780A3 publication Critical patent/EP0572780A3/xx
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0284—Cleaning devices removing liquids removing lubricants
    • 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 invention relates to a method and an apparatus for cleaning metal strip surfaces, in particular for removing oil-containing deposits when the strip is heated in continuous annealing lines, and with the further generic features mentioned in claim 1.
  • a wafer-thin, greasy coating of about 0.1 to 1 ⁇ m thick from residues of the rolling emulsion or rolling oil, mixed with a small amount of iron abrasion in a covering density between 5 and 50 mg Fe per m 2 , on cold-rolled thin sheet Surface, and other solids - mainly iron oxides, but also oxides of the alloying elements.
  • a typical composition of the residues after rolling can be given as follows:
  • the oil residue can also contain dissolved iron, depending on the alkalinity of the oil - 0.05 to 0.5% can be found.
  • the ester compounds hydrolyzed to fatty acids from the roll emulsion in the event of excess water can form metal soaps (carboxylates) with the metal hydroxide on the strip surface.
  • metal soaps carboxylates
  • This process only starts at strip temperatures above 100 ° C; iron and manganese tend to form metal soaps, but not copper and nickel. There is also no evidence of metal soap formation on stainless steel strips (chrome / nickel / iron).
  • carboxylates are very difficult to distill off and leave dark shades. According to current knowledge, they are the main cause of carbon residues on the belt.
  • the volatile paraffinic mineral oil components evaporate between 100 and 300 ° C; their thermal stability decreases sharply with the chain length. This is followed by naphthenic and aromatic hydrocarbons, at around 400 ° C only the higher-boiling esters are detectable.
  • Continuous annealing lines are necessary upstream of belt cleaning systems to remove the oily residues on the strip surface.
  • Processes such as spray cleaning with strongly alkaline cleaning solutions, steam or spray degreasing using trichlorethylene, the various electrolytic cleaning processes and combined processes that work in the vapor and liquid phases are known.
  • One or more brushing devices are installed in almost all systems.
  • the spraying power can be increased so that the cleaning is only effected by the high pressure.
  • Alkaline cleaning solutions contain organic solvents such as trichlorethylene or perchlorethylene, and inorganic solvents such as soda, caustic alkalis, as well as complexing agents, silicates, pyrophosphates, tripolyphosphates, and surface-active substances, mostly low-foam biodegradable surfactants.
  • organic solvents such as trichlorethylene or perchlorethylene
  • inorganic solvents such as soda, caustic alkalis, as well as complexing agents, silicates, pyrophosphates, tripolyphosphates, and surface-active substances, mostly low-foam biodegradable surfactants.
  • the choice of cleaning method depends on the desired surface condition of the belt before it is processed further, for example whether it is varnished after cleaning, fire-proof zinc, chrome-plated or in some other way to be surface-coated, or whether it is subjected to an annealing treatment, in the result of which certain material properties are expected - as in the case of electrical sheet, for example, minimal magnetic loss and high polarization with minimal aging.
  • the preparation of the solvents enriched with the oily residue is critical in all processes, whether immersion, spraying, brushing or electrolytic processes. First, the residue must be separated from the solvent in complex process steps. Only then can it be disposed of appropriately.
  • a method for annealing thin steel sheet with a thickness of less than 0.5 mm with oil residues in a protective gas atmosphere containing at least 20% hydrogen is described in European Patent Application 0405092 A 1 (1990). Thereafter, good cleaning quality can be achieved if, when the coil is heated, a temperature of 450 ° C. is exceeded only after a period of 5 hours or longer.
  • the annealing of metal strip in continuous annealing lines differs from the stationary annealing process in bell-type furnaces in particular in that when untreated strip is passed through, suitable measures must be taken to prevent the otherwise inevitable carbon deposits in the furnace chamber.
  • suitable measures In order to convert the oil that evaporates when the strip is heated in the furnace into CO and C0 2 , an atmosphere that oxidizes against carbon must be set.
  • Sensitive materials in this regard such as vacuum-degassed, ultra-pure electrical steel grades with the lowest carbon and oxygen contents, can only be annealed under gas atmospheres that have a reducing effect on the metal surface and the alloying elements.
  • FR-A-2308436 describes a method for removing oil residues on the inner wall of copper pipe. This consists in that the tube is heated to a temperature during the annealing process which is sufficient to produce the vapor pressure required for the evaporation of the oil residues. The resulting oil vapors are removed by flushing gas.
  • the impingement flow which is generated by blowers, pumps and the like, and slot or round nozzles.
  • This is characterized in that a gas jet emerging from a nozzle with a high outflow velocity strikes the strip surface vertically or with the jet axis slightly inclined to the normal.
  • the turbulent free jet hitting the belt is deflected into a wall-parallel flow when it hits it. Because of the high gas velocities, much higher heat transfers can be achieved with the impingement flow than with a gas flowing along the material to be heated.
  • the characteristics of the impingement flow have been adequately described in the specialist literature; R. Gardon, JC Akfirat: "The rate of turbulence in determining the heat-transfer characteristics of impinging jets", Int. Journal Heat Mass Transfer, Vol. 8 (1965), pp. 1261-1272.
  • the belt entering the cleaning section is exposed to an atmosphere that oxidizes not only carbon but also iron.
  • the negative effects remain tolerably small, provided that the belt only stays in the cleaning section for a short time and the belt surface is protected for as long as possible by the oil film, which has not yet completely evaporated - provided the temperature is appropriate. Under these conditions, the oxidation is of no importance kinetically.
  • This object is achieved according to the invention by a cleaning process integrated in the continuous annealing process with the features mentioned in the characterizing part of claims 1 and 2.
  • This has the particular advantage that the strip in the area of the impingement is heated up quickly by superimposing heat radiation and convection to a temperature (Ti) which corresponds to the boiling point of the oil residue, which, in conjunction with the rate of heating (T ) increasing vapor pressure ( PD ) allow the thermal conditions for a complete vaporization of even polar adhering oil components to be set.
  • the nozzles directed onto the belt produce a blow-off effect, with it proving to be an additional advantage that the pressure energy (pg) of the gas jet is adapted to the degree of surface contamination via the outflow speed ( Ud ) and therefore via the adjustable blower pressure (pi) can.
  • the advantage of being able to influence the evaporation process by heating the strip surface under the gas jet is based on the fact that the strip temperature (T 1 ) and the evaporation rate (4 »of the oil residue are linked via the boiling curve) and on the observation that the evaporation rate (4 »is normally distributed over the temperature (T):
  • the temperature (Ti) of the strip under the gas jet is calculated as given the temperature (T o ) at which the strip enters the area of the impingement flow and the given protective gas temperature (Tg) Function of the heat transfer coefficient (a d ), half the width (R) of the area covered by the impinging gas jet, and the density (p), thickness (h), speed (u) and heat capacity (c) of the strip according to:
  • the latter represents the solution of a differential equation, which is derived from the fixed consideration of the heat transfer and the heat transport on a strip element of the strip moving at speed (u) under the gas jet.
  • the temperature calculation according to the above equation can be used particularly advantageously for strips in the thickness range below 3 mm; the temperature deviation between the surface of the strip and the middle of the strip cross-section is in the range of tenths of a Kelvin.
  • the rows of nozzles are positioned within the cleaning section, hence T o > T a and T 1 ⁇ T e .
  • the temperature (T 1 ) at which the boiling point occurs is defined using an empirically determined, substance-specific numerical value of the oil residue (y):
  • the following relationships can advantageously be used to control the evaporation and blow-off process:
  • the pressure energy of the gas jet increases with the square of the outflow speed (u d ). It is advantageous that according to the laws of the impingement flow, the mean heat transfer coefficient (a d ) and thus the strip temperature (T 1 ) also increase, according to:
  • the change in fan pressure thus affects both the evaporation rate and the blow-off effect.
  • the use of hydrogen-enriched protective gas is advantageous for heat transfer and tape cleanliness.
  • at least as much water vapor is added to this as is required by the mass action law when the heterogeneous and homogeneous water gas equilibrium is established for the conversion of the carbon from the oil residue.
  • the oxidation potential ( ⁇ Ox ) compared to carbon is calculated from the equilibrium constants of the water gas reactions and the partial pressures or volume fractions of hydrogen and water vapor:
  • the equilibrium constants of the water gas reactions can be found in the relevant specialist literature, see for example D'ANSLAX, paperback for chemists and physicists, Springer-Vlg. (1967), Volume 1, p.
  • the volume fractions CO and C0 2 can be calculated as follows: With a known carbon coating on the belt, which can be equated with the mass of the oil coating on the belt for practical purposes, an equilibrium condition can be formulated, from which for a given carbon coating multiplied by the evaporation rate, either the required minimum oxidation potential for a given gas supply from the nozzle (V d ) can be determined, or, given the oxidation potential of the protective gas, the minimum gas supply of the nozzle: The evaporation rate ( ⁇ ), which is the mass fraction of the oil residue which evaporates in the cleaning section from the initial temperature (T a ) to the final temperature (T e ) of the belt, is to be used in this condition.
  • Another advantage of the method according to the invention is that the protective gas temperature and therefore the temperature of the gas jet is very much higher than the temperature of the strip entering the cleaning part. As the strip heats up, the temperature difference decreases, but the strip temperature at the outlet of the cleaning section remains significantly, up to several hundred Kelvin, below the protective gas temperature.
  • the measure provides additional security to heat the belt in the cleaning section via the distribution of the radiant heating pipes or electrical heating elements and the positioning of the rows of nozzles so that the boiling temperature (T " ) of the oil residue is only reached shortly before leaving the cleaning section, so that it is not yet Completely evaporated oil film protects the belt surface against oxidation for as long as possible, so it remains exposed to the oxidizing atmosphere for only a very short time.
  • the belt After leaving the cleaning section through the outlet lock, the belt reaches an atmosphere that reduces iron, manganese, silicon and aluminum.
  • Oil residues are generally washed off the strip surface with a volatile solvent, for example trichlorofluorocarbon, known under the trade names Freon, Kaltron, Frigen, or n-heptane (light petrol).
  • a volatile solvent for example trichlorofluorocarbon, known under the trade names Freon, Kaltron, Frigen, or n-heptane (light petrol).
  • ⁇ evaporation rate
  • T n-heptane
  • bimodal or multimodal distributions can also occur whenever the residue consists of a mixture of different types of oil, for example mineral oil and synthetic or animal / vegetable esters.
  • the oils differ in their structure and molar mass and consequently also in their boiling behavior.
  • thermograms In Fig. 1 the right part of the picture shows the boiling curve, the left part of the picture shows the first derivative of the boiling curve after time. Since the heating rate is kept constant, for example 1 Kelvin per minute, the boiling loss per unit of time is equivalent to the boiling loss per Kelvin temperature increase. If the boiling loss is divided by the initial weight, the evaporation rate ( ⁇ ) results. The evaporation rate ( ⁇ ) is the determined integral below the evaporation rate in the temperature range under consideration.
  • evaporation rate follows a multimodal distribution function, which is however so dominated by the normally distributed evaporation rates of the two main components of the oil residue that it can be regarded as a bimodal function to a good approximation.
  • the boiling maxima of the two dominant distributions occur at 229.4 ° C, corresponding to 502.6 Kelvin, and at 378.5 ° C, corresponding to 651.7 Kelvin, with a spread of 53.9 and 18.1 Kelvin.
  • the maximum evaporation rates are 0.0037 and 0.0110 per Kelvin.
  • the evaporation rate ( ⁇ ) can thus be calculated on the basis of the bimodality from the sum of the two normally distributed evaporation rates ( ⁇ A ) and ( ⁇ B ) of the main components of the oil residue:
  • thermograms in Fig. 3 The results of examinations are compared, between which there is a period of 16 months.
  • FIG. 4 shows the side view of the inlet part of the glow line in longitudinal section as the first special exemplary embodiment of the cleaning device according to the invention.
  • the belt 1 is guided into the cleaning part 4 separated by the inlet lock 2 and outlet lock 3 against the ambient air or against the adjacent furnace atmosphere.
  • the latter is equipped with nozzle bars 11 and jet heating tubes 7 arranged successively above and below the belt.
  • the belt is moved on driven support rollers 6 through the cleaning part.
  • dry protective gas for example a hydrogen / nitrogen mixture in a ratio of four to one, flows in countercurrent through the outlet lock 3 into the cleaning part 4.
  • the protective gas is supplied by a steam feed 13, which is in the rear third of the cleaning part below the Belt opens into the furnace chamber, mixed with water vapor.
  • the protective gas outlet 18 is located near the inlet lock also below the belt.
  • the protective gas in the cleaning part is circulated with a plurality of blowers 8 installed on the furnace and driven by electric motor 15, by suction through a suction line 14 leading through the furnace vault and through the pressure line and nozzle bars 11 and nozzles 12 arranged above and below the belt onto the belt surface is blown.
  • two thermocouples 17 are installed in the rear third of the cleaning part, which are expediently guided from above through the vault into the furnace chamber.
  • Fig. 5 shows the cross section of the cleaning part with blower 8 and associated electric drive 15, suction line 14, pressure line 9 and the throttle valve 10 built therein for quantity regulation as well as the positioning of the dew point control 16, nozzle bar 11 and nozzles 12, support roller 6 and volume 1 and the steam feed 13.
  • claim 8 provide a modified version of the cleaning part according to claim 7 insofar as it is divided into several chambers by locks, so that the cleaning distance can be shortened or lengthened depending on the belt speed by means of fans and rows of nozzles as well as required in the individual chambers Steam can be switched off or on.
  • the areas of the important process parameters time duration, strip temperature and heating speed under the impingement flow are defined, for which the process is essentially designed.
  • a temperature below the decomposition temperature of the oil residue is given as the upper limit which the belt temperature may reach before leaving the cleaning part.
  • the latter is the temperature at which the vapor pressure, even under isothermal conditions, i.e. without further temperature rise, becomes a time-dependent variable and the vapor pressure increase is by definition 1.87 Pascal per second.
  • claims 9 and 11 to 14 provide embodiments of the cleaning device which have a homogeneous and effective protective gas atmosphere and regulated heating ensure the tape.
  • an embodiment of the nozzle holder in the nozzle bar 11 is specified, through which the nozzles 12 are brought out of the danger zone in the simplest way when threading the beginning of the tape.
  • claim 5 as an alternative process feature to claim 4 is specified to guide the belt after leaving the cleaning part through the outlet lock 3 into a decarburizing furnace atmosphere with a correspondingly high dew point, which extends the scope of the method to materials that are used, for example, for reasons of susceptibility to aging must be subjected to decarburization annealing
  • the features of claim 6 provide a feasible with simple technical means, environmentally friendly exhaust gas combustion or exhaust gas utilization device, which ensures that only C0 2 , H 2 0 and N 2 occur in the exhaust gas.
  • the evaporation rate ( ⁇ ) can be a good approximation as the sum of the integrals of the two evaporation rates ( ⁇ A ) and ( ⁇ B ) normally distributed over the temperature (T) within the limits given with the beginning and end temperature (T a ) and end temperature (T e ) being represented.
  • T a beginning and end temperature
  • T e end temperature
  • the rolling oil supplier provides the relevant information; As a rule, component A will be the mineral oil component boiling at a lower temperature and component B will be the fatty acid / fatty ester component boiling at a higher temperature.
  • the information refers to the fresh oil delivered, it is advisable to check it on the oil residue by determining the saponification number according to DIN 51 559.
  • the final strip temperature (T e ) must be specified;
  • the substance constant ( ⁇ B ) of the oil residue, with the aid of which the temperature at which the evaporation of component B has ended, must be known.
  • Tg protective gas temperature
  • T o the temperature of the belt
  • the temperature of the belt moving through the cleaning section at constant speed (u) increases linearly with the length of the furnace, the temperature increase under the impingement flow ultimately depends on the position of the nozzle in the cleaning section.
  • the heating speed (T) of the strip under the gas jet changes and, in proportion to the heating speed, the vapor pressure (p B ) of the oil film on the surface of the strip changes.
  • the change in vapor pressure with the heating rate in the boiling range of oil components A and B corresponds to their evaporation rates at these temperatures; component B will be about a factor of 0.0100 / 0.0033 ⁇ 3 larger than component A. This is important insofar as the heating rate (T) decreases with increasing strip temperature (T o ); Water vapor feed 10 volume percent:
  • the heating speed is reduced, for example, to around half if the value at the nozzle position 14 m is compared with that at the nozzle position 26 m.
  • This disadvantage is compensated for by the larger gradient of the vapor pressure rise with the heating speed at the nozzle position 26 m.
  • Fig. 7 shows how the minimum shielding gas requirement changes depending on the water vapor content and the nozzle position, indicated by the strip temperature (T o ) when entering under the gas jet.
  • the conditions in the temperature range between 350 and 750 Kelvin and a water vapor feed of 10 to 20 percent by volume are shown.
  • a constant carbon coating m c 0.5 g / m 2 surface area of the belt entering the cleaning section is assumed. Under these conditions, otherwise as stated above, the shielding gas requirement increases with the strip temperature and decreases with the proportion of water vapor in the shielding gas.
  • High strip temperatures (T o ), from 664 to 700 Kelvin, and high water vapor proportions between 16 and 20 percent by volume from the point of view of protective gas consumption are considered favorable for the cleaning effect.
  • Fig. 8 shows the carbon that can be converted per standard cubic meter of shielding gas as a function of the water vapor content and the shielding gas temperature (Tg).
  • Tg shielding gas temperature
  • the relationships in the temperature range between 800 and 1200 Kelvin and with a steam feed of 1 to 20 percent by volume are shown.
  • the oxidation potential ( ⁇ Ox ) compared to carbon grows exponentially with the gas temperature and practically linear with the water vapor content in the protective gas.
  • the inert gas circulation should be such that temperature differences in the gas atmosphere are reduced and carbon deposits are avoided.
  • the turbulence is said to promote the conversion of carbon to CO and C0 2 until equilibrium is reached. It is therefore important to ensure that the sum of the volume flows of all nozzles connected exceeds the shielding gas throughput at least twice.
  • the heat exchange with the belt becomes more intense, the gas will cool down. As the gas temperature drops, the conversion of the carbon according to FIG. 8 will decrease. It is therefore necessary to limit the amount circulated.
  • the circulation rate in the inlet section can be increased without causing the oil film to evaporate there, by rotating the nozzles of the front nozzle bars upwards from the vertical position, as in the threading process, so that the gas jet moves away from the belt surface, for example onto the radiant heating pipes or is directed horizontally.
  • the minimum circulation capacity as a function of the water vapor feed is determined as follows, in standard cubic meters per hour:

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
EP93105667A 1992-04-06 1993-04-06 Verfahren und Vorrichtung zur Reinigung von Metallbandoberflächen durch Gasspülung in wasserstoffreichen Atmosphären Expired - Lifetime EP0572780B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4211457 1992-04-06
DE4211457 1992-04-06

Publications (3)

Publication Number Publication Date
EP0572780A2 EP0572780A2 (de) 1993-12-08
EP0572780A3 EP0572780A3 (enrdf_load_stackoverflow) 1994-04-27
EP0572780B1 true EP0572780B1 (de) 1995-07-26

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EP93105667A Expired - Lifetime EP0572780B1 (de) 1992-04-06 1993-04-06 Verfahren und Vorrichtung zur Reinigung von Metallbandoberflächen durch Gasspülung in wasserstoffreichen Atmosphären

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EP (1) EP0572780B1 (enrdf_load_stackoverflow)
DE (1) DE59300400D1 (enrdf_load_stackoverflow)

Cited By (1)

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CN104759476A (zh) * 2015-04-29 2015-07-08 中冶南方工程技术有限公司 一种冷轧带钢表面清洁装置及方法

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DE19840778A1 (de) * 1998-09-07 2000-03-09 Messer Griesheim Gmbh Verfahren und Vorrichtung zur Reinigung von Metalloberflächen
FR2978775B1 (fr) 2011-08-03 2014-02-14 Air Liquide Procede de preparation de surfaces d'aluminium par traitement par plasma atmospherique pour le depot de revetements sans promoteurs d'adherence
PL232443B1 (pl) * 2017-06-20 2019-06-28 Przed Wielobranzowe Omega Spolka Jawna Lukasz Sosnowski Boguslaw Stempien Sposób i układ do odtłuszczania oraz zabezpieczania antykorozyjnego taśm lub arkuszy wykonanych z metali lub ich stopów
CN108220585A (zh) * 2017-12-06 2018-06-29 包头钢铁（集团）有限责任公司 退火方法、退火系统和罩式炉
TW202442372A (zh) * 2019-05-29 2024-11-01 美商應用材料股份有限公司 使用蒸氣以預熱或清潔cmp元件的方法及系統
BR112022007669A2 (pt) * 2019-11-12 2022-08-09 Speira Gmbh Tratamento térmico regulado de folha
DE102021201616A1 (de) * 2020-05-29 2021-12-02 Sms Group Gmbh Verfahren zum rekristallisierenden Glühen eines nicht-kornorientierten Elektrobandes
CN114060834B (zh) * 2021-10-11 2023-12-26 佛山市三水凤铝铝业有限公司 一种喷涂挂具清理装置及其清理方法

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DE3325198C2 (de) * 1983-07-13 1998-10-29 Schloemann Siemag Ag Verfahren und Anordnung zum Reinigen von kaltgewalzten Metallbändern
FR2562562B1 (fr) * 1984-04-04 1986-08-08 Stein Heurtey Procede et dispositif de nettoyage en continu d'une bande metallique
DE8603098U1 (de) * 1986-02-06 1986-03-27 Gebr. Bellmer GmbH + Co KG Maschinenfabrik, 7532 Niefern Reinigungsvorrichtung für ein Endlosband
DE3639657A1 (de) * 1986-11-20 1988-06-01 Philips Patentverwaltung Verfahren zum reinigen von metallbauteilen fuer kathodenstrahlroehren
DE3734200A1 (de) * 1987-10-09 1989-04-27 Kliro Bau Gmbh & Co Kg Verfahren und vorrichtung zum entfernen anhaftenden schmiermittels von werkstuecken

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104759476A (zh) * 2015-04-29 2015-07-08 中冶南方工程技术有限公司 一种冷轧带钢表面清洁装置及方法
CN104759476B (zh) * 2015-04-29 2017-06-13 中冶南方工程技术有限公司 一种冷轧带钢表面清洁装置及方法

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EP0572780A2 (de) 1993-12-08
EP0572780A3 (enrdf_load_stackoverflow) 1994-04-27
DE59300400D1 (de) 1995-08-31

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