CA2845109A1 - Reuse of used oil in a rolling mill - Google Patents
Reuse of used oil in a rolling mill Download PDFInfo
- Publication number
- CA2845109A1 CA2845109A1 CA2845109A CA2845109A CA2845109A1 CA 2845109 A1 CA2845109 A1 CA 2845109A1 CA 2845109 A CA2845109 A CA 2845109A CA 2845109 A CA2845109 A CA 2845109A CA 2845109 A1 CA2845109 A1 CA 2845109A1
- Authority
- CA
- Canada
- Prior art keywords
- oil
- used oil
- rolling mill
- emulsion
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010913 used oil Substances 0.000 title claims abstract description 42
- 238000005096 rolling process Methods 0.000 title abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims description 36
- 239000002699 waste material Substances 0.000 claims description 30
- 238000005461 lubrication Methods 0.000 claims description 16
- 238000005097 cold rolling Methods 0.000 claims description 14
- 238000005098 hot rolling Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003995 emulsifying agent Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000011282 treatment Methods 0.000 claims description 6
- 239000008346 aqueous phase Substances 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 37
- 238000005554 pickling Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001687 destabilization Effects 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000238634 Libellulidae Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- B21B45/0239—Lubricating
- B21B45/0242—Lubricants
-
- 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
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
- B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
-
- 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
- B21B45/029—Liquid recovering devices
- B21B45/0296—Recovering lubricants
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
Abstract
The present invention relates to a method for lubricating a rolling mill using a lubricant including used oil.
Description
REUSE OF USED OIL IN A ROLLING MILL
Fiels of the invention [0001] The present invention relates to a lubrication method in a rolling mill. More particularly it relates to a lubrication method using used oil, i.e. degraded and/or contaminated oil.
State of the art
Fiels of the invention [0001] The present invention relates to a lubrication method in a rolling mill. More particularly it relates to a lubrication method using used oil, i.e. degraded and/or contaminated oil.
State of the art
[0002] Cold-rolling mills consume a large amount of oil for lubricating the contact between the rolls and the product being rolled. The lubrication is carried out by means of a mixture of water and oil called an emulsion, typically comprising between 0.5 and 4% of oil in water.
[0003] The emulsion generally flows in a closed circuit, as for example illustrated in documents JP 56-041011, JP 6-246330 or in Fig. 1. Within the circuit, the emulsion is collected, treated by means of filters and oil skimmers and is then sent back to the rolling mill.
During use, fresh oil is mixed with the recycled emulsion in order to maintain the oil concentration constant.
During use, fresh oil is mixed with the recycled emulsion in order to maintain the oil concentration constant.
[0004] Over time, the emulsion degrades and/or is contaminated by iron fines, by the presence of micro-organisms, by the acid coming from the preliminary pickling lines, by oils used in other portions of the rolling mill, etc. Accordingly, a portion or the totality of the emulsion must be emptied and stored in a waste tank before it is subsequently treated in a specialized center.
This generates a significant amount of wastes. The wastes from the lubrication method not only include the emptied - =
= CA 02845109 2014-02-12 emulsions but also the oily sludges that are deposited in the filters, on the equipment, as well as the oil from the filtration of skimmed oils.
This generates a significant amount of wastes. The wastes from the lubrication method not only include the emptied - =
= CA 02845109 2014-02-12 emulsions but also the oily sludges that are deposited in the filters, on the equipment, as well as the oil from the filtration of skimmed oils.
[0005] Presently, used emulsions are generally de-oiled in an emulsion-separation plant and/or dissociated into oil and into water (see Fig. 1). During the storing of the wastes, the used emulsions from the rolling may also be mixed with other used emulsions used in any other step occurring in the manufacturing of steel sheets. The dissociated oils are then sent to a purification plant where they are evaporated. These dissociated oils may be mixed, before purification, with other used oils, used during the manufacturing of steel sheets. These oils may then be burnt, for example in blast the furnaces of a steel-working plant.
[0006] The handling of these wastes and their treatment generate costs that are highly significant and that could be reduced by using again the wastes within the rolling process, whether this is hot or cold rolling.
Aims of the invention
Aims of the invention
[0007] The present invention aims to provide a solution that allows the reuse of the used emulsions, oily sludges and used oils within the rolling process and, in particular within the hot-rolling process.
[0008] It thus aims to reduce the amount of wastes produced and the costs associated with their handling and treatment.
Main characteristic elements of the invention
Main characteristic elements of the invention
[0009] The present invention relates to a lubrication method in a rolling mill by means of a lubricant comprising used oil.
-= CA 02845109 2014-02-12
-= CA 02845109 2014-02-12
[0010] According to particular embodiments of the invention, the method comprises at least one or a suitable combination of the following characteristics:
- said used oil stems from a waste or a mixture of wastes from one or several of the steps occurring in the manufacturing of a metal;
- said used oil at least partly stems from a waste coming from a cold-rolling mill;
- said used oil is reused as a lubricant in a hot-rolling mill;
- the waste comprises a used emulsion, an oily sludge or a used oil;
- the used emulsion and the oily sludge are treated by means of a separation technique to extract said used oil;
- said used oil is taken from a supernatant layer above the aqueous phase of the used emulsion;
- the used oil taken from the supernatant layer above the aqueous phase of the used emulsion is reused as a lubricant in a hot-rolling mill without being subjected to any purification treatment;
- the used emulsion is mixed with other wastes beforehand;
- the lubricant comprises a mixture of used oil and water;
- the mixture comprises an emulsifier;
- the lubricant comprises the used oil that is not mixed with water;
- the waste stems from a lubrication process in a cold-rolling mill or from a pickling process before the cold-rolling mill;
- The result is a force reduction of the order of 30%
during the hot rolling of a steel sheet.
Short description of the figures
- said used oil stems from a waste or a mixture of wastes from one or several of the steps occurring in the manufacturing of a metal;
- said used oil at least partly stems from a waste coming from a cold-rolling mill;
- said used oil is reused as a lubricant in a hot-rolling mill;
- the waste comprises a used emulsion, an oily sludge or a used oil;
- the used emulsion and the oily sludge are treated by means of a separation technique to extract said used oil;
- said used oil is taken from a supernatant layer above the aqueous phase of the used emulsion;
- the used oil taken from the supernatant layer above the aqueous phase of the used emulsion is reused as a lubricant in a hot-rolling mill without being subjected to any purification treatment;
- the used emulsion is mixed with other wastes beforehand;
- the lubricant comprises a mixture of used oil and water;
- the mixture comprises an emulsifier;
- the lubricant comprises the used oil that is not mixed with water;
- the waste stems from a lubrication process in a cold-rolling mill or from a pickling process before the cold-rolling mill;
- The result is a force reduction of the order of 30%
during the hot rolling of a steel sheet.
Short description of the figures
[0011] Fig.1 schematically illustrates the complete cycle of the emulsion, according to the state of the art, in a cold-rolling mill.
[0012] Fig.2 illustrates the force reduction resulting from the lubrication of a hot-rolling cage by means of various lubricants including one reference and those according to the invention.
Detailed description of the invention
Detailed description of the invention
[0013] The present invention relates to a method for lubricating a rolling mill by means of a lubricant comprising used oil, which will also be called waste oil.
Preferentially, the used oil according to the invention is reused in a hot-rolling mill requiring a lower oil quality than that of a cold-rolling mill. However, the present invention does not exclude the reuse of waste oil in a cold-rolling mill.
Preferentially, the used oil according to the invention is reused in a hot-rolling mill requiring a lower oil quality than that of a cold-rolling mill. However, the present invention does not exclude the reuse of waste oil in a cold-rolling mill.
[0014] The expression used oil more particularly designates an oil that is degraded and/or contaminated and that, in this condition, no longer has the properties required for optimum lubrication of a cold-rolling mill even after filtration and provision of fresh oil. It thus differs from a recycled emulsion/oil within a closed loop such as described in documents JP 56-041011 and JP 6-246330 of the state of the art.
[0015] The expression used oil also includes degraded and/or contaminated oil as defined above having further been subjected to one or several treatments before it is reused.
[0016] The degraded and/or contaminated nature of an oil depends on the application field and is not easy to define in a universal way. In the case of a cold-rolling mill, the emulsion is thoroughly monitored. It may be = CA 02845109 2014-02-12 decided to empty the emulsion on the basis of several criteria which inter alia are a modification of the pH of the emulsion, of the stability of the emulsion, of the size = of the particles of the emulsion, of the viscosity of the 5 oil, of the rolling forces, etc. Each rolling mill has its own operating window. Therefore, it is delicate to quantify the wear of an oil without unduly limiting the scope of the invention.
[0017] The used oil may stem from oily sludges, a used emulsion, and/or, more simply, from a waste oil, all three of which will be commonly called wastes. These wastes may stem from a lubrication process of a cold-rolling mill and/or from any other step occurring in the manufacturing of a metal, and more particularly in the manufacturing of steel sheets (pickling, winding, etc.). The present invention also extends to the use of a used oil stemming from other applications (French fry shops, change of oil from engine, etc.). The used oil may thus be obtained from a mixture of oils stemming from several sources of wastes.
[0018] The used oils may be extracted from sludges or used emulsions by means of a separation techniques selected according to the composition of the wastes and to the amount of oil required for the application. More simply, the separation may be carried out naturally within the tank by destabilization of the emulsion at rest. Thus, in the waste tank, the used oil will form a supernatant layer above the aqueous phase and may be directly withdrawn.
[0019] As a non-limiting example, the lubrication method according to the invention is illustrated below for a hot-rolling mill but, as already mentioned, the method according to the invention may also be implemented on a cold-rolling mill.
[0020] Two used oils stemming from lubrication in an industrial cold-rolling mill for steel sheets, and mixed = CA 02845109 2014-02-12 with used preservation oils used on pickling lines, have been tested in a pilot hot-rolling mill and compared with a fresh reference oil. The tests related to the rolling of a ferrous metal, namely steel. Both used oils were taken from the upper layer which formed in the waste tank by destabilization of the water/oil emulsion. They comprise less than 0.5% of water and have not been subjected to any purification treatment before reuse. Both used oils stem from the same tank and have color variations (very dark brown and dark brown versus very pale brown for fresh oil) which express variations in compositions and/or in concentrations of emulsifier within the layer in suspension.
[0021] First of all, the emulsions were prepared with a 1% concentration of oil by means of a mixer. The properties of the oil and water mixture without or with emulsifier were evaluated. The emulsifier concentration in the mixtures comprising the latter, amounts to 2%. The tests have shown that both used oils have different capabilities of mixing into water. Thus, for a first used oil, called o waste 1 , the mixing is carried out with difficulty in the absence of an emulsifier, while in the presence of an emulsifier, the mixing is carried out properly. In the case of the second used oil, called o waste 2 , good mixing properties are observed whether with or without an emulsifier. In parallel, an emulsion with 1% of fresh oil was prepared as a reference.
[0022] The prepared emulsions were sprayed on rolling rolls with pressures of 3 and 7 bars giving an emulsion flow rate of 3 L/min and 4.75 L/min, respectively.
[0023] Fig.2 illustrates the average percentage of force reduction for the various emulsions tested relative to a rolling test carried out without lubrication, moreover everything else being equal. One observes a force reduction =
that may attain 30% with the used oil, called waste 1 , and may be greater than the one obtained with the reference oil. It is further observed that the addition of emulsifier tends to reduce the lubrication performances.
5 [0024] Additional tests were carried out with pure used oil, i.e. not dispersed in water. The pure oil was sprayed with flow rates of 10 and 20 L/min on rolling rolls, according to the method described in document WO 2009/046505 for example. The results of these tests are also shown in Fig.2. A force reduction greater or equal to 30% is observed.
[0025] The present invention was illustrated for the rolling of ferrous metals. The lubrication method according to the invention using used oil may be extended to lubrication within the scope of rolling of non-ferrous metals.
that may attain 30% with the used oil, called waste 1 , and may be greater than the one obtained with the reference oil. It is further observed that the addition of emulsifier tends to reduce the lubrication performances.
5 [0024] Additional tests were carried out with pure used oil, i.e. not dispersed in water. The pure oil was sprayed with flow rates of 10 and 20 L/min on rolling rolls, according to the method described in document WO 2009/046505 for example. The results of these tests are also shown in Fig.2. A force reduction greater or equal to 30% is observed.
[0025] The present invention was illustrated for the rolling of ferrous metals. The lubrication method according to the invention using used oil may be extended to lubrication within the scope of rolling of non-ferrous metals.
Claims (10)
1. A lubrication method in a hot-rolling mill by means of a lubricant comprising used oil, said used oil stemming at least partly from waste coming from a cold-rolling mill.
2. The method according to Claim 1, characterized in that said used oil stems from waste or from a mixture of wastes from one or several of the steps occurring in the manufacturing of a metal.
3. The method according to Claim 1 or 2, characterized in that the waste comprises a used emulsion, an oily sludge or a waste oil.
4. The method according to Claim 3, characterized in that the used emulsion and the oily sludge are treated by means of a separation technique in order to extract said used oil.
5. The method according to Claim 3, characterized in that said used oil is taken from a supernatant layer above the aqueous phase of the used emulsion.
6. The method according to Claim 5, characterized in that the used oil taken from the supernatant layer above the aqueous phase of the used emulsion is reused as a lubricant in a hot-rolling mill without being subjected to any purification treatment.
7. The method according to any of the preceding claims, characterized in that the lubricant comprises a mixture of used oil and of water.
8. The method according to Claim 7, characterized in that the mixture comprises an emulsifier.
9. The method according to any of Claims 1 to 6, characterized in that the lubricant comprises the used oil not mixed with water.
10. The method according to any of the preceding claims, characterized in that it results in a force reduction of the order of 30% during hot-rolling of a steel sheet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE2011/0545A BE1020250A3 (en) | 2011-09-13 | 2011-09-13 | REUSE USED OIL IN A ROLLING MILL. |
| BE2011/0545 | 2011-09-13 | ||
| PCT/EP2012/067716 WO2013037760A1 (en) | 2011-09-13 | 2012-09-11 | Reuse of used oil in a rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2845109A1 true CA2845109A1 (en) | 2013-03-21 |
| CA2845109C CA2845109C (en) | 2020-04-28 |
Family
ID=46851466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2845109A Expired - Fee Related CA2845109C (en) | 2011-09-13 | 2012-09-11 | Reuse of used oil in a rolling mill |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20150121981A1 (en) |
| EP (1) | EP2755779B1 (en) |
| BE (1) | BE1020250A3 (en) |
| BR (1) | BR112014005571A2 (en) |
| CA (1) | CA2845109C (en) |
| ES (1) | ES2560383T3 (en) |
| WO (1) | WO2013037760A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833105B (en) * | 2014-02-24 | 2016-03-23 | 中国海洋石油总公司 | A kind of method containing gathering oil-sludge treatment and crude oil recovery |
| CA2944403C (en) * | 2014-04-30 | 2019-02-26 | Jfe Steel Corporation | High-strength steel sheet for containers and method for producing the same |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2807531A (en) * | 1954-12-14 | 1957-09-24 | Kovacs Louis | Process for treating rolling oil |
| US3523895A (en) * | 1969-04-21 | 1970-08-11 | Mobil Oil Corp | Metal working lubricant |
| JPS5242737B2 (en) * | 1972-04-26 | 1977-10-26 | ||
| JPS5829168B2 (en) | 1979-09-12 | 1983-06-21 | 川崎製鉄株式会社 | Rolling oil supply method in cold rolling mill |
| JPS60206518A (en) * | 1984-03-30 | 1985-10-18 | Sumitomo Metal Ind Ltd | Method of controlling cold rolling oil |
| US4959160A (en) * | 1987-04-15 | 1990-09-25 | Iscor Limited | Process for the treatment of contaminated emulsion |
| JPH06246330A (en) | 1993-03-03 | 1994-09-06 | Nippon Steel Corp | Method and device for circulating water-soluble rolling liquid |
| JP2772237B2 (en) * | 1994-03-29 | 1998-07-02 | 川崎製鉄株式会社 | Method for producing ferritic stainless steel strip with small in-plane anisotropy |
| US5498351A (en) * | 1994-05-12 | 1996-03-12 | Loctite Corporation | Anti-seizing lubricant composition, and method of making the same |
| US6059976A (en) * | 1997-08-28 | 2000-05-09 | Kaiser Aluminum & Chemical Corporation | Reclamation of spent aluminum rolling coolant oils, emulsions and dispersions |
| BE1017806A3 (en) | 2007-10-08 | 2009-07-07 | Ct Rech Metallurgiques Asbl | ATOMIZATION LUBRICATION SYSTEM AND METHOD FOR ROLLING CYLINDERS. |
| ES2532394T3 (en) * | 2008-11-27 | 2015-03-26 | Hydro Aluminium Deutschland Gmbh | Recovery of used cooling lubricant lubricants |
-
2011
- 2011-09-13 BE BE2011/0545A patent/BE1020250A3/en not_active IP Right Cessation
-
2012
- 2012-09-11 EP EP12759097.4A patent/EP2755779B1/en not_active Not-in-force
- 2012-09-11 US US14/343,302 patent/US20150121981A1/en not_active Abandoned
- 2012-09-11 BR BR112014005571-8A patent/BR112014005571A2/en not_active Application Discontinuation
- 2012-09-11 CA CA2845109A patent/CA2845109C/en not_active Expired - Fee Related
- 2012-09-11 WO PCT/EP2012/067716 patent/WO2013037760A1/en active Application Filing
- 2012-09-11 ES ES12759097.4T patent/ES2560383T3/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| BE1020250A3 (en) | 2013-07-02 |
| ES2560383T3 (en) | 2016-02-18 |
| EP2755779B1 (en) | 2015-11-18 |
| EP2755779A1 (en) | 2014-07-23 |
| CA2845109C (en) | 2020-04-28 |
| BR112014005571A2 (en) | 2017-06-13 |
| WO2013037760A1 (en) | 2013-03-21 |
| US20150121981A1 (en) | 2015-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20170817 |
|
| MKLA | Lapsed |
Effective date: 20220912 |