EP0597803A1 - Method for cleaning rolling oils - Google Patents
Method for cleaning rolling oils Download PDFInfo
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- EP0597803A1 EP0597803A1 EP93810739A EP93810739A EP0597803A1 EP 0597803 A1 EP0597803 A1 EP 0597803A1 EP 93810739 A EP93810739 A EP 93810739A EP 93810739 A EP93810739 A EP 93810739A EP 0597803 A1 EP0597803 A1 EP 0597803A1
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- oil
- coagulator
- rolling
- dimer acid
- mixture
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/04—Working-up used lubricants to recover useful products ; Cleaning aqueous emulsion based
Definitions
- the present invention relates to a method for cleaning rolling oils which contain, as dirty oil, abrasion particles from metals which can be processed into strip-shaped semifinished products, in particular light metals.
- the greater part of the resulting aluminum abrasion is rinsed from the work roll surfaces (roll roughness) by the sprayed rolling oil (coolant and lubricant) into the reflowing rolling oil.
- These abrasive aluminum particles consist of an oil film that is physisorbed by the Al oxide layer of the metallic particle.
- the aluminum particles suspended in the rolling oil show an electrostatic surface charge (zeta potential) in the same direction, so that the particles cannot sediment in the normal gravitational field.
- zeta potential electrostatic surface charge
- the abrasion particles present as a suspension in the foil rolling oil show a characteristic distribution which is dependent on the diameter of the particles.
- the total amount of wear particles in the rolling oil is traditionally determined as an oxide ash. This determination can be carried out gravimetrically (DIN-EN 7) or photometrically (% g / g).
- a conventional method for cleaning rolling oils is solid / liquid filtration.
- the Schneider filter is particularly preferred.
- This fully automatic system a horizontally operating multi-chamber vacuum plate filter, consumes large amounts of filter paper tape and filter aids (sands, organic absorbents).
- the object of the present invention is to overcome these disadvantages and to provide a process which enables complete coagulation and thus complete separation of the metal debris from the rolling oils and does not require aqueous coagulants.
- this is achieved by adding 2 to 8 g of dimer acid per 1000 g of dirty oil to the dirty oil and passing the mixture through a coagulator.
- the dimer acid is the dimerization product of oleic acid.
- the dimers of oleic acid can be produced, for example, by thermal polymerization or clay-catalyzed polymerization.
- the dimer acids are also referred to as polymerized fatty acids and have an acid number (mg KOH / g) of e.g. 191 to 198 and a saponification number (mg KOH / g) from 195 to 205.
- the dimers can also contain so-called intermediates (also called 1.5 mer) and / or trimers or can also consist of trimers.
- the dimer acid is preferably added in amounts of 2 to 5 g, preferably 2 g, of dimer acid per 1000 g of dirty oil.
- dimer acid for example as 10 to 50%, expediently as 25%, dimer acid (weight / volume) dissolved in base oil is used.
- Fresh or cleaned rolling oil is referred to as base oil.
- the method according to the invention is advantageously suitable for cleaning dirty oils which arise from the rolling oils in the production of metal foils, such as aluminum foils. Accordingly, the method is particularly suitable for foil rolling oil cleaning and thereby for foil rolling oil cleaning from the method of rolling aluminum foils.
- the method can be explained in more detail using the machine arrangement shown in FIG. 1 as an example.
- the dirty oil is continuously removed from a storage container (1) and transferred to the coagulator (3) via the feed line (2).
- the dimer is located in a storage container (4), for example as a 25% solution of dimers in the base oil (weight / volume).
- the dimer mixes with the dirty oil and is fed to the coagulator (3) with a decanter centrifuge, the fine dust coagulating and the coagulate being discharged from the coagulator (3) into a collecting container (5).
- the pre-cleaned dirty oil can then be fed via the line (7) into a chamber centrifuge (8).
- the remaining coagulate residues are safely removed in the chamber centrifuge (8).
- the arrows (9) indicate the sludge residues from coagulate.
- the cleaned rolling oil can be returned to the rolling mill or an intermediate storage tank via line (11).
- the positions (6) and (10) show exemplary attached measuring points at which samples can be taken for analysis.
- a vacuum plate filter can also be provided instead of the chamber centrifuge (8).
- Vacuum plate filters can be used with the help of paper filters and filter aids, e.g. Sand.
- the mixture of dirty oil and dimer acid is fed to a coagulator.
- the mixture is passed through a coagulator and then through a centrifuge.
- the mixture is passed through a coagulator with a decanter centrifuge. In a preferred embodiment, the mixture is then treated in a chamber centrifuge.
- the mixture is particularly preferably treated in a coagulator with a decanter centrifuge and then in a chamber centrifuge.
- the process according to the invention is carried out at temperatures of, for example, 60 to 100 ° C. and preferably at 90 ° C.
- the present method can be operated in a rolling oil main or secondary flow. If the process is operated in the main stream, the system components, e.g. the coagulator can be sized accordingly.
- a degree of rolling oil cleaning measured by the oxide ash content according to DIN-EN7, of equal to or less than 0.01% can be achieved.
- the residues contain only metal debris, such as aluminum debris and rolling oil. As a rule, about 1.3 kg of waste is generated per 1000 l of rolling oil. This waste can be destroyed by incineration, and there are about 350 g Al2O3 per 1000 l of treated rolling oil.
- the precipitant in the present physical coagulation is from the coagulating metal, e.g. Aluminum abrasion is completely absorbed and does not get into the rolling oil.
- control measures can be taken in that the output photometer cell of the coagulator blocks the cell flow of the coagulant when the signal of complete coagulation is given.
- 12 l / min of dirty oil are removed from a storage tank with a capacity of 2000 l.
- the dirty oil has a temperature of 90 ° C.
- 0.025 l / min dimers dissolved in base oil (25% weight / volume) are added to the dirty oil and treated first in a coagulator with a decanter centrifuge, then in a chamber centrifuge. Samples are taken at points (6) and (10) according to FIG. 1.
- the following table shows the measured values.
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- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
Vorliegende Erfindung betrifft ein Verfahren zum Reinigen von Walzölen, die als Schmutzöl Abriebpartikel von zu bandförmigem Halbzeug verarbeitbaren Metallen, insbesondere Leichtmetallen, enthalten.The present invention relates to a method for cleaning rolling oils which contain, as dirty oil, abrasion particles from metals which can be processed into strip-shaped semifinished products, in particular light metals.
Bei der Kaltwalzverformung von z.B. Aluminium im Mischreibungsbereich entsteht unabdingbar Aluminiumabrieb. Diese Aluminiumpartikel mit einem Durchmesser grösser als 0.1 µm bleiben teilweise in dem Ölfilm auf den walzverformten (harten) Folienoberflächen zurück und werden als Smudge bezeichnet.When cold rolling, e.g. Aluminum in the mixed friction area inevitably creates aluminum abrasion. These aluminum particles with a diameter larger than 0.1 µm partly remain in the oil film on the roll-formed (hard) film surfaces and are referred to as smudge.
Der grössere Anteil des entstandenen Aluminiumabriebes wird von den Arbeitswalzenoberflächen (Walzenrauhigkeit) durch das aufgesprühte Walzöl (Kühl- und Schmiermittel) in das zurückfliessende Walzöl gespült.The greater part of the resulting aluminum abrasion is rinsed from the work roll surfaces (roll roughness) by the sprayed rolling oil (coolant and lubricant) into the reflowing rolling oil.
Diese abrasiv entstandenen Aluminiumpartikel bestehen aus einem Ölfilm, der von der Al-Oxidschicht des metallischen Partikels physisorbiert ist.These abrasive aluminum particles consist of an oil film that is physisorbed by the Al oxide layer of the metallic particle.
Die im Walzöl suspendierten Aluminiumpartikel zeigen eine gleichsinnige elektrostatische Oberflächenladung (zeta-Potential), so dass die Teilchen im normalen Schwerefeld nicht sedimentieren können.The aluminum particles suspended in the rolling oil show an electrostatic surface charge (zeta potential) in the same direction, so that the particles cannot sediment in the normal gravitational field.
Die im Folienwalzöl als Suspension vorliegenden Abriebpartikel zeigen eine charakteristische, vom Durchmesser der Teilchen abhängige Verteilung. Die Gesamtmenge der Abriebteilchen im Walzöl wird tradititionsgemäss als Oxidasche bestimmt. Diese Bestimmung kann gravimetrisch (DIN-EN 7) oder photometrisch (% g/g) erfolgen.The abrasion particles present as a suspension in the foil rolling oil show a characteristic distribution which is dependent on the diameter of the particles. The total amount of wear particles in the rolling oil is traditionally determined as an oxide ash. This determination can be carried out gravimetrically (DIN-EN 7) or photometrically (% g / g).
Eine konventionelle Methode zur Reinigung von Walzölen ist die Fest/Flüssig-Filtration. Besonders bevorzugt wird der Schneider-Filter. Diese vollautomatisch arbeitende Anlage, ein horizontal arbeitender Mehrkammer-Vakuum-Plattenfilter, verbraucht grosse Mengen von Filtrierpapierband und Filtrierhilfsmittel (Sande, organische Absorbentien).A conventional method for cleaning rolling oils is solid / liquid filtration. The Schneider filter is particularly preferred. This fully automatic system, a horizontally operating multi-chamber vacuum plate filter, consumes large amounts of filter paper tape and filter aids (sands, organic absorbents).
Daneben sind andere Reinigungssysteme wie Kerzenfilter (sandgefüllte Drahtkerzen) und Anschwemm-Kerzenfilter in Gebrauch.In addition, there are other cleaning systems such as candle filters (sand-filled Wire candles) and precoat candle filter in use.
Diese Filtrationseinrichtungen benötigen Hilfsstoffe wie z.B. Filtriersand oder organische Filtrierfeststoffe. Jedenfalls ist die Entsorgung dieser Hilfsstoffe problematisch und kostspielig.These filtration devices require auxiliary materials such as Filtration sand or organic filtration solids. In any case, the disposal of these auxiliaries is problematic and costly.
Mit Hilfe von Zentrifugen kann nur der gröbere Anteil des Al-Abriebes (grösser als 0.5 µm) abgeschieden werden. Kombinationen von in Linie geschalteten Zentrifugen und Filtriereinrichtungen sind wenig effizient, da die Einsatzzeit der Filtrierhilfsmittel vom Feinstanteil des Al-Abriebes diktiert wird.With the help of centrifuges, only the coarser portion of the aluminum abrasion (larger than 0.5 µm) can be separated. Combinations of centrifuges and filtering devices connected in line are not very efficient, since the operating time of the filtering aids is dictated by the fine fraction of the aluminum abrasion.
Der Einsatz von Kammerzentrifugen nach Reinigungsoperationen, besonders nach einem Schneider-Filter ist unbedingt nötig, wenn mit dem gereinigten Walzöl Doppelstiche gefahren werden. Mitgerissene Spuren von "Filtersand" werden durch das Schwerefeld der Zentrifuge abgeschieden. Spuren von "Filtersand" im Walzöl können während der Kaltwalzverformung schwere Oberflächenfehler auf den abgewalzten Folien verursachen (Feinstporosität, Kommas, Schattierungen, usw).The use of chamber centrifuges after cleaning operations, especially after a Schneider filter, is absolutely necessary if double stitches are used with the cleaned rolling oil. Traces of "filter sand" that are carried away are separated out by the gravitational field of the centrifuge. Traces of "filter sand" in the rolling oil can cause severe surface defects on the rolled foils during the cold rolling deformation (fine porosity, commas, shading, etc.).
Beispielsweise aus der DE-PS 26 13 878 ist eine chemische Koagulation zur Reinigung von Walzölen bekannt. Das erwärmte Schmutzöl wird dabei durch einen Koagulator geleitet und bei einem Durchsatz von 400 bis 1200 Litern pro Stunde werden 0,5 bis 1,5 Liter 15 bis 25 %-ige, wässrige Natriumcarbonat-Lösung zudosiert, wonach die gebildeten Koagulate abzentrifugiert werden. Bei diesem Verfahren entstehen geringe Mengen an Wasserstoffgas.For example, from DE-PS 26 13 878 chemical coagulation for cleaning rolling oils is known. The heated dirty oil is passed through a coagulator and at a throughput of 400 to 1200 liters per hour, 0.5 to 1.5 liters of 15 to 25% aqueous sodium carbonate solution are metered in, after which the coagulates formed are centrifuged off. This process produces small amounts of hydrogen gas.
Die bekannten Verfahren zur Reinigung von Walzölen können nicht in allen Teilen befriedigen und es wird als nachteilig angesehen, dass die Reinigung nur im Nebenstrom erfolgt und daher keine vollständige Entfernung des Aluminiumabriebes erfolgt. Zudem ist kein vollautomatischer Betrieb möglich. Die Verwendung von wässrigen Koagulationsmitteln fördert die Korrosionsgefahr. Das Koagulat, d.h. der abgeschiedene Farbstoff ist nicht inhibiert und kann Wasserstoff entwickeln.The known processes for cleaning rolling oils cannot satisfy in all parts and it is considered disadvantageous that the cleaning only takes place in the secondary flow and therefore no complete removal of the aluminum debris takes place. In addition, fully automatic operation is not possible. The use of aqueous coagulants promotes the risk of corrosion. The coagulate, i.e. the deposited dye is not inhibited and can develop hydrogen.
Aufgabe vorliegender Erfindung ist es, diese Nachteile zu überwinden und ein Verfahren zur Verfügung zu stellen, das eine vollständige Koagulation und damit eine vollständige Abtrennung des Metallabriebes aus den Walzölen ermöglicht und keine wässrigen Koagulationsmittel benötigt.The object of the present invention is to overcome these disadvantages and to provide a process which enables complete coagulation and thus complete separation of the metal debris from the rolling oils and does not require aqueous coagulants.
Erfindungsgemäss wird dies dadurch erreicht, dass dem Schmutzöl 2 bis 8 g Dimersäure pro 1000 g Schmutzöl zugesetzt werden und das Gemisch durch einen Koagulator geleitet wird.According to the invention, this is achieved by adding 2 to 8 g of dimer acid per 1000 g of dirty oil to the dirty oil and passing the mixture through a coagulator.
Bei der Dimersäure handelt es sich um das Dimerisierungsprodukt der Ölsäure. Die Ölsäure hat die chemische Formel
CH₃(CH₂)₇ CH=CH(CH₂)₇ COOH
The dimer acid is the dimerization product of oleic acid. The oleic acid has the chemical formula
CH₃ (CH₂) ₇ CH = CH (CH₂) ₇ COOH
Die Dimere der Ölsäure sind herstellbar beispielsweise durch eine thermische Polymerisation oder tonkatalysierte Polymerisation. Die Dimersäuren werden auch als polymerisierte Fettsäuren bezeichnet und weisen eine Säurezahl (mg KOH/g) von z.B. 191 bis 198 und eine Verseifungszahl (mg KOH/g) von 195 bis 205. Die Dimeren können auch sogenannte Intermediates (auch 1,5 mer genannt) und/oder Trimere enthalten oder auch aus Trimeren bestehen.The dimers of oleic acid can be produced, for example, by thermal polymerization or clay-catalyzed polymerization. The dimer acids are also referred to as polymerized fatty acids and have an acid number (mg KOH / g) of e.g. 191 to 198 and a saponification number (mg KOH / g) from 195 to 205. The dimers can also contain so-called intermediates (also called 1.5 mer) and / or trimers or can also consist of trimers.
Bevorzugt wird die Dimersäure in Mengen von 2 bis 5 g, vorzugsweise 2 g, Dimersäure pro 1000 g Schmutzöl zugesetzt.The dimer acid is preferably added in amounts of 2 to 5 g, preferably 2 g, of dimer acid per 1000 g of dirty oil.
In der Praxis wird die Dimersäure, beispielsweise als 10 bis 50 %-ige, zweckmässig als 25 %-ige, Dimersäure (Gewicht/Volumen) in Basisöl gelöst, angewendet. Als Basisöl wird frisches oder gereinigtes Walzöl bezeichnet.In practice, dimer acid, for example as 10 to 50%, expediently as 25%, dimer acid (weight / volume) dissolved in base oil is used. Fresh or cleaned rolling oil is referred to as base oil.
Das erfindungsgemässe Verfahren eignet sich vorteilhaft für die Reinigung von Schmutzölen, die aus den Walzölen bei der Herstellung von Metallfolien, wie Aluminiumfolien, entstehen. Demnach eignet sich das Verfahren insbesondere zur Folienwalzölreinigung und dabei um die Folienwalzölreinigung aus dem Verfahren des Walzens von Aluminiumfolien.The method according to the invention is advantageously suitable for cleaning dirty oils which arise from the rolling oils in the production of metal foils, such as aluminum foils. Accordingly, the method is particularly suitable for foil rolling oil cleaning and thereby for foil rolling oil cleaning from the method of rolling aluminum foils.
Beispielhaft kann das Verfahren an der in Figur 1 gezeigten Maschinenanordnung näher erläutert werden.The method can be explained in more detail using the machine arrangement shown in FIG. 1 as an example.
Aus einem Vorratsbehälter (1) wird das Schmutzöl kontinuierlich entnommen und über die Zuführleitung (2) in den Koagulator (3) übergeführt. In einem Vorratsbehälter (4) befindet sich das Dimere, beispielsweise als 25 %-ige Lösung von Dimeren im Basisöl (Gewicht/Volumen). Das Dimere mischt sich mit dem Schmutzöl und wird dem Koagulator (3) mit Dekantierzentrifuge zugeführt, wobei der Feinstabrieb koaguliert und das Koagulat aus dem Koagulator (3) in einen Auffangbehälter (5) ausgetragen wird. Das vorgereinigte Schmutzöl kann dann über die Leitung (7) in eine Kammerzentrifuge (8) geführt werden. In der Kammerzentrifuge (8) werden die noch verbliebenen Reste von Koagulat sicher entfernt. Die Pfeile (9) deuten auf die Schlammreste aus Koagulat. Über Leitung (11) kann das gereinigte Walzöl wieder dem Walzbetrieb oder einem dazwischenliegenden Vorratstank zugeführt werden.The dirty oil is continuously removed from a storage container (1) and transferred to the coagulator (3) via the feed line (2). The dimer is located in a storage container (4), for example as a 25% solution of dimers in the base oil (weight / volume). The dimer mixes with the dirty oil and is fed to the coagulator (3) with a decanter centrifuge, the fine dust coagulating and the coagulate being discharged from the coagulator (3) into a collecting container (5). The pre-cleaned dirty oil can then be fed via the line (7) into a chamber centrifuge (8). The remaining coagulate residues are safely removed in the chamber centrifuge (8). The arrows (9) indicate the sludge residues from coagulate. The cleaned rolling oil can be returned to the rolling mill or an intermediate storage tank via line (11).
Die Stellen (6) und (10) zeigen beispielshaft angebrachte Messpunkte, an denen Proben zur Analyse entnommen werden können.The positions (6) and (10) show exemplary attached measuring points at which samples can be taken for analysis.
Anstelle der Kammerzentrifuge (8) kann auch ein Vakuumplattenfilter vorgesehen werden. Vakuumplattenfilter können mit Hilfe von Papierfiltern und Filtrierhilfsmitteln, wie z.B. Sand, betrieben werden.A vacuum plate filter can also be provided instead of the chamber centrifuge (8). Vacuum plate filters can be used with the help of paper filters and filter aids, e.g. Sand.
In zweckmässiger Ausführungsform wird das Gemisch aus Schmutzöl und Dimersäure einem Koagulator zugeleitet. In weiterer zweckmässiger Ausführungsform wird das Gemisch durch einen Koagulator und anschliessend durch eine Zentrifuge geleitet.In an expedient embodiment, the mixture of dirty oil and dimer acid is fed to a coagulator. In a further expedient embodiment, the mixture is passed through a coagulator and then through a centrifuge.
In bevorzugter Ausführungsform wird das Gemisch durch einen Koagulator mit Dekantierzentrifuge geleitet. In bevorzugter Ausführungsform wird das Gemisch anschliessend in einer Kammerzentrifuge behandelt.In a preferred embodiment, the mixture is passed through a coagulator with a decanter centrifuge. In a preferred embodiment, the mixture is then treated in a chamber centrifuge.
Besonders bevorzugt wird das Gemisch in einem Koagulator mit Dekantierzentrifuge und anschliessend in einer Kammerzentrifuge behandelt.The mixture is particularly preferably treated in a coagulator with a decanter centrifuge and then in a chamber centrifuge.
Das erfindungsgemässe Verfahren wird bei Temperaturen von z.B. 60 bis 100 °C und vorzugsweise bei 90 °C durchgeführt.The process according to the invention is carried out at temperatures of, for example, 60 to 100 ° C. and preferably at 90 ° C.
Vorliegendes Verfahren kann in einem Walzöl-Haupt- oder -Nebenstrom betrieben werden. Wird das Verfahren im Hauptstrom betrieben, müssen die Anlageteile, wie z.B. der Koagulator entsprechend in ihrer Grösse dimensioniert werden. Es kann ein Walzöl-Reinigungsgrad, gemessen durch den Oxid-Aschegehalt nach DIN-EN7, von gleich oder kleiner als 0,01 % erreicht werden kann. Die Rückstände enthalten nur Metallabrieb, wie Aluminiumabrieb und Walzöl. In der Regel fallen pro 1000 l Walzöl etwa 1,3 kg Abfall an. Dieser Abfall kann durch Verbrennung unschädlich vernichtet werden, und es resultieren etwa 350 g Al₂O₃ pro 1000 l behandeltes Walzöl.The present method can be operated in a rolling oil main or secondary flow. If the process is operated in the main stream, the system components, e.g. the coagulator can be sized accordingly. A degree of rolling oil cleaning, measured by the oxide ash content according to DIN-EN7, of equal to or less than 0.01% can be achieved. The residues contain only metal debris, such as aluminum debris and rolling oil. As a rule, about 1.3 kg of waste is generated per 1000 l of rolling oil. This waste can be destroyed by incineration, and there are about 350 g Al₂O₃ per 1000 l of treated rolling oil.
Das Fällungsmittel bei der vorliegenden physikalischen Koagulation, die im Basisöl gelöste Dimersäure, wird vom koagulierenden Metall, wie z.B. Aluminiumabrieb völlig absorbiert und gelangt nicht in das Walzöl.The precipitant in the present physical coagulation, the dimer acid dissolved in the base oil, is from the coagulating metal, e.g. Aluminum abrasion is completely absorbed and does not get into the rolling oil.
Sollten bei Unregelmässigkeiten des Betriebes des Koagulators in Basisöl gelöste Dimersäure in das Walzöl gelangen, sind folgende Effekte zu beobachten:
- Bei einer Konzentration von Dimersäure im Walzöl von ≦ 0.2 % (g/v) wirkt dieser Zusatz als hochwirksamer Akzelerator der Reaktionsschmierung bei der Kaltwalzverformung von Al-Folie. Bei der Entfettungsglühung hat diese Konzentration von Dimersäure im Walzöl, resp. im Ölfilm auf den walzharten Folienoberflächen keine Auswirkung auf die Klebeneigung der Folienbahnen.
- Bei einer Konzentration von > 0.5 % (g/v) Dimersäure im Walzöl verliert dieser Zusatz die Wirkung als Schmierungsakzelerator. Bei der Entfettungsglühung bewirkt diese Konzentration von Dimersäure im Walzöl, resp. im Ölfilm auf der walzharten Folienoberfläche eine starke Klebeneigung der Folienbahnen.
- With a concentration of dimer acid in the rolling oil of ≦ 0.2% (w / v), this additive acts as a highly effective accelerator of the reaction lubrication in the cold rolling deformation of Al foil. When degreasing, this concentration of dimer acid in the rolling oil, resp. in the oil film on the hard-rolled film surfaces, no effect on the tendency of the film webs to stick.
- At a concentration of> 0.5% (w / v) dimer acid in the rolling oil, this additive loses its effect as a lubrication accelerator. When degreasing, this concentration of dimer acid in the rolling oil, resp. a strong tendency of the film webs to stick in the oil film on the hard-rolled film surface.
Bis die kritische Konzentration von Dimersäure im Folienwalzöl erreicht wird, müssen zweckmässig zum völlig koagulierten Walzöl z.B. weitere 20 l Koagulationsmittel (Dimersäure 25 % g/v gelöst in Basisöl) auf 1000 l Walzöl zugeführt werden.Until the critical concentration of dimer acid in the foil rolling oil is reached, it is advisable to add another 20 l coagulant (dimer acid 25% w / v dissolved in base oil) to 1000 l rolling oil to the fully coagulated rolling oil.
Zur Vermeidung derartiger kritischer Konzentrationen können regeltechnische Massnahmen getroffen werden, indem die Ausgangsphotometerzelle des Koagulators beim Signal der vollständigen Koagulation den Zellfluss des Koagulationsmittels sperrt.To avoid such critical concentrations, control measures can be taken in that the output photometer cell of the coagulator blocks the cell flow of the coagulant when the signal of complete coagulation is given.
In einer Vorrichtung nach Figur 1 werden aus einem Vorratstank mit 2000 l Inhalt 12 l/min Schmutzöl entnommen. Das Schmutzöl hat eine Temperatur von 90 °C. Dem Schmutzöl werden 0,025 l/min Dimere gelöst in Basisöl (25 %-ig Gewicht/Volumen) zugesetzt und zuerst im Koagulator mit Dekantierzentrifuge, dann in einer Kammerzentrifuge behandelt. An den Stellen (6) und (10) gemäss Figur 1 werden Proben entnommen. Nachfolgende Tabelle gibt die Messwerte wieder.
Claims (6)
dadurch gekennzeichnet, dass
dem Schmutzöl 2 bis 8 g Dimersäure pro 1000 g Schmutzöl zugesetzt werden und das Gemisch durch einen Koagulator geleitet wird.Process for cleaning rolling oils which contain, as dirty oil, abrasion particles from metals which can be processed into strip-shaped semi-finished products, in particular light metals,
characterized in that
2 to 8 g of dimer acid are added to the waste oil per 1000 g of waste oil and the mixture is passed through a coagulator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3470/92 | 1992-11-10 | ||
| CH3470/92A CH684410A5 (en) | 1992-11-10 | 1992-11-10 | A method for cleaning of roll oil. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0597803A1 true EP0597803A1 (en) | 1994-05-18 |
Family
ID=4256659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93810739A Withdrawn EP0597803A1 (en) | 1992-11-10 | 1993-10-21 | Method for cleaning rolling oils |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5332510A (en) |
| EP (1) | EP0597803A1 (en) |
| CA (1) | CA2109495A1 (en) |
| CH (1) | CH684410A5 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999021946A1 (en) * | 1997-10-29 | 1999-05-06 | Metallgesellschaft Aktiengesellschaft | Regeneration of acid reaction lubricant residues |
| DE19905817A1 (en) * | 1999-02-12 | 2000-08-31 | Achenbach Buschhuetten Gmbh | Process for the preparation and conditioning of circulating rolling oil |
| DE102007028737A1 (en) | 2007-06-21 | 2008-12-24 | Ulrich Georg Hammer | Method for preparing rolling oil from mixture of rolling oil and xenobiotic, involves bringing mixture of rolling oil and xenobiotic in contact with liquid extracting agent under agitation in agitator containers |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19645945B4 (en) * | 1996-11-07 | 2005-02-03 | Hubertus Dipl.-Ing. Meyer | Process for preparing processing oils used in metalworking |
| DE10011513A1 (en) * | 2000-03-09 | 2001-09-20 | Fraunhofer Ges Forschung | Spent cutting suspension recovery, comprises adding agent to suspension to induce flocculation of solid particles |
| CN113201393B (en) * | 2021-05-31 | 2022-11-29 | 内蒙古联晟新能源材料有限公司 | Environment-friendly nuisanceless aluminum coil rolling oil recovery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2631979A (en) * | 1950-08-30 | 1953-03-17 | Standard Oil Dev Co | Rust inhibiting composition |
| US3450627A (en) * | 1967-08-10 | 1969-06-17 | Nalco Chemical Co | Purifying used metalworking lubricating oils |
| DE2613878A1 (en) * | 1975-04-10 | 1976-10-21 | Alusuisse | CLEANING PROCEDURES FOR ROLLING OIL |
| DE3342372A1 (en) * | 1982-12-13 | 1984-06-14 | Sulzer-Escher Wyss AG, Zürich | METHOD AND DEVICE FOR CLEANING ROLLING OIL, ESPECIALLY FOR USE IN LIGHT METAL ROLLING |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3095368A (en) * | 1957-07-31 | 1963-06-25 | Exxon Research Engineering Co | Process for removing metallic contaminants from oils |
| US3523895A (en) * | 1969-04-21 | 1970-08-11 | Mobil Oil Corp | Metal working lubricant |
| AU533444B2 (en) * | 1978-09-28 | 1983-11-24 | Salusinszky, A.L. | Regeneration of used lubricating oils |
| US4287049A (en) * | 1980-02-05 | 1981-09-01 | Phillips Petroleum Co. | Reclaiming used lubricating oils with ammonium salts and polyhydroxy compounds |
| US4522729A (en) * | 1984-07-30 | 1985-06-11 | Phillips Petroleum Company | Filtration of oil |
-
1992
- 1992-11-10 CH CH3470/92A patent/CH684410A5/en not_active IP Right Cessation
-
1993
- 1993-10-18 US US08/138,758 patent/US5332510A/en not_active Expired - Fee Related
- 1993-10-21 EP EP93810739A patent/EP0597803A1/en not_active Withdrawn
- 1993-10-28 CA CA002109495A patent/CA2109495A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2631979A (en) * | 1950-08-30 | 1953-03-17 | Standard Oil Dev Co | Rust inhibiting composition |
| US3450627A (en) * | 1967-08-10 | 1969-06-17 | Nalco Chemical Co | Purifying used metalworking lubricating oils |
| DE2613878A1 (en) * | 1975-04-10 | 1976-10-21 | Alusuisse | CLEANING PROCEDURES FOR ROLLING OIL |
| DE3342372A1 (en) * | 1982-12-13 | 1984-06-14 | Sulzer-Escher Wyss AG, Zürich | METHOD AND DEVICE FOR CLEANING ROLLING OIL, ESPECIALLY FOR USE IN LIGHT METAL ROLLING |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999021946A1 (en) * | 1997-10-29 | 1999-05-06 | Metallgesellschaft Aktiengesellschaft | Regeneration of acid reaction lubricant residues |
| US6479439B1 (en) | 1997-10-29 | 2002-11-12 | Metallgesellschaft Aktiengesellschaft | Regenerator of acid reaction lubricant residues |
| DE19905817A1 (en) * | 1999-02-12 | 2000-08-31 | Achenbach Buschhuetten Gmbh | Process for the preparation and conditioning of circulating rolling oil |
| DE19905817C2 (en) * | 1999-02-12 | 2003-06-18 | Achenbach Buschhuetten Gmbh | Process for the preparation and conditioning of circulating rolling oil |
| DE102007028737A1 (en) | 2007-06-21 | 2008-12-24 | Ulrich Georg Hammer | Method for preparing rolling oil from mixture of rolling oil and xenobiotic, involves bringing mixture of rolling oil and xenobiotic in contact with liquid extracting agent under agitation in agitator containers |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2109495A1 (en) | 1994-05-11 |
| US5332510A (en) | 1994-07-26 |
| CH684410A5 (en) | 1994-09-15 |
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