US20150121981A1 - Reuse of Used Oil in a Rolling Mill - Google Patents

Reuse of Used Oil in a Rolling Mill Download PDF

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Publication number
US20150121981A1
US20150121981A1 US14/343,302 US201214343302A US2015121981A1 US 20150121981 A1 US20150121981 A1 US 20150121981A1 US 201214343302 A US201214343302 A US 201214343302A US 2015121981 A1 US2015121981 A1 US 2015121981A1
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US
United States
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.)
Abandoned
Application number
US14/343,302
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English (en)
Inventor
Bart Vervaet
Christophe Pelletier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to CENTRE DE RECHERCHES METALLURGIQUES ASBL reassignment CENTRE DE RECHERCHES METALLURGIQUES ASBL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PELLETIER, CHRISTOPHE, VERVAET, BART
Publication of US20150121981A1 publication Critical patent/US20150121981A1/en
Abandoned legal-status Critical Current

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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

Definitions

  • 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.
  • 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.
  • the emulsion generally flows in a closed circuit, as for example illustrated in documents JP 56-041011, JP 6-246330 or in FIG. 1 .
  • the emulsion is collected, treated by means of filters and oil skimmers and is then sent back to the rolling mill.
  • fresh oil is mixed with the recycled emulsion in order to maintain the oil concentration constant.
  • 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 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.
  • used emulsions are generally de-oiled in an emulsion-separation plant and/or dissociated into oil and into water (see FIG. 1 ).
  • 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.
  • 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.
  • the present invention relates to a lubrication method in a rolling mill by means of a lubricant comprising used oil.
  • 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 lubric
  • FIG. 1 schematically illustrates the complete cycle of the emulsion, according to the state of the art, in a cold-rolling mill.
  • 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.
  • 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.
  • a lubricant comprising used oil, which will also be called waste oil.
  • 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.
  • the present invention does not exclude the reuse of waste oil in a cold-rolling mill.
  • 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.
  • 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.
  • the degraded and/or contaminated nature of an oil depends on the application field and is not easy to define in a universal way.
  • the emulsion is thoroughly monitored. It may be 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 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a first used oil called ⁇ 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.
  • the second used oil called ⁇ waste 2>>
  • good mixing properties are observed whether with or without an emulsifier.
  • an emulsion with 1% of fresh oil was prepared as a reference.
  • 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.
  • 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.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)
US14/343,302 2011-09-13 2012-09-11 Reuse of Used Oil in a Rolling Mill Abandoned US20150121981A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE2011/0545 2011-09-13
BE2011/0545A BE1020250A3 (fr) 2011-09-13 2011-09-13 Reutilisation d'huile usee dans un laminoir.
PCT/EP2012/067716 WO2013037760A1 (fr) 2011-09-13 2012-09-11 Réutilisation d'huile usée dans un laminoir

Publications (1)

Publication Number Publication Date
US20150121981A1 true US20150121981A1 (en) 2015-05-07

Family

ID=46851466

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/343,302 Abandoned US20150121981A1 (en) 2011-09-13 2012-09-11 Reuse of Used Oil in a Rolling Mill

Country Status (7)

Country Link
US (1) US20150121981A1 (fr)
EP (1) EP2755779B1 (fr)
BE (1) BE1020250A3 (fr)
BR (1) BR112014005571A2 (fr)
CA (1) CA2845109C (fr)
ES (1) ES2560383T3 (fr)
WO (1) WO2013037760A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10415111B2 (en) * 2014-04-30 2019-09-17 Jfe Steel Corporation High-strength steel sheet for containers and method for producing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103833105B (zh) * 2014-02-24 2016-03-23 中国海洋石油总公司 一种含聚油泥处理及原油回收的方法

Citations (7)

* Cited by examiner, † Cited by third party
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
US4959160A (en) * 1987-04-15 1990-09-25 Iscor Limited Process for the treatment of contaminated emulsion
US5498351A (en) * 1994-05-12 1996-03-12 Loctite Corporation Anti-seizing lubricant composition, and method of making the same
US5505797A (en) * 1994-03-29 1996-04-09 Kawasaki Steel Corporation Method of producing ferritic stainless steel strip with small intra-face anisotropy
US6059976A (en) * 1997-08-28 2000-05-09 Kaiser Aluminum & Chemical Corporation Reclamation of spent aluminum rolling coolant oils, emulsions and dispersions
US8642518B2 (en) * 2008-11-27 2014-02-04 Hydro Aluminum Rolled Products Gmbh Recovery of lubricants from used cooling lubricants

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242737B2 (fr) * 1972-04-26 1977-10-26
JPS5829168B2 (ja) 1979-09-12 1983-06-21 川崎製鉄株式会社 冷間圧延機における圧延油供給法
JPS60206518A (ja) * 1984-03-30 1985-10-18 Sumitomo Metal Ind Ltd 冷間圧延油の管理方法
JPH06246330A (ja) 1993-03-03 1994-09-06 Nippon Steel Corp 水溶性圧延液の循環方法及びその装置
BE1017806A3 (fr) 2007-10-08 2009-07-07 Ct Rech Metallurgiques Asbl Installation et procede de lubrification par atomisation pour cylindres de laminage.

Patent Citations (7)

* Cited by examiner, † Cited by third party
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
US4959160A (en) * 1987-04-15 1990-09-25 Iscor Limited Process for the treatment of contaminated emulsion
US5505797A (en) * 1994-03-29 1996-04-09 Kawasaki Steel Corporation Method of producing ferritic stainless steel strip with small intra-face 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
US8642518B2 (en) * 2008-11-27 2014-02-04 Hydro Aluminum Rolled Products Gmbh Recovery of lubricants from used cooling lubricants

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10415111B2 (en) * 2014-04-30 2019-09-17 Jfe Steel Corporation High-strength steel sheet for containers and method for producing the same

Also Published As

Publication number Publication date
BR112014005571A2 (pt) 2017-06-13
EP2755779A1 (fr) 2014-07-23
ES2560383T3 (es) 2016-02-18
EP2755779B1 (fr) 2015-11-18
CA2845109A1 (fr) 2013-03-21
WO2013037760A1 (fr) 2013-03-21
CA2845109C (fr) 2020-04-28
BE1020250A3 (fr) 2013-07-02

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