EP1409752A2 - Valorisation de calamine chargee d'huile dans des fours a cuve et des convertisseurs - Google Patents

Valorisation de calamine chargee d'huile dans des fours a cuve et des convertisseurs

Info

Publication number
EP1409752A2
EP1409752A2 EP01974103A EP01974103A EP1409752A2 EP 1409752 A2 EP1409752 A2 EP 1409752A2 EP 01974103 A EP01974103 A EP 01974103A EP 01974103 A EP01974103 A EP 01974103A EP 1409752 A2 EP1409752 A2 EP 1409752A2
Authority
EP
European Patent Office
Prior art keywords
weight
water
mixture
mill scale
acid
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.)
Withdrawn
Application number
EP01974103A
Other languages
German (de)
English (en)
Inventor
Wolfgang Schwetlick
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP1409752A2 publication Critical patent/EP1409752A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/962—Treating or using mill scale

Definitions

  • the invention relates to the recovery of oil-contaminated mill scale. Under the
  • the mill scale is produced when steel is rolled. That applies to both
  • the mill scale produces water and oil.
  • Shaft furnace or in converters is fed in order to utilize the iron contained therein.
  • the blast furnaces and the cupola furnaces belong to the shaft furnaces. All shaft furnaces are characterized by a vertical, tubular shaft.
  • Shaft furnaces are used to produce pig iron by reducing oxidic
  • Iron and the slag formed flow off at the bottom of the shaft furnace.
  • the Möller In the top part of the oven, the Möller is first dried. Hydroxide iron ores change into oxidic ones. As it descends in the shaft, the
  • the mill scale By using mill scale in the Möller, the mill scale can be disposed of and put to an advantageous economic use.
  • the mill scale reacts like the ore.
  • the prior art includes DE 4101584 AI, DE 4329630 AI and DE 3632364 C2.
  • Oil-contaminated mill scale would make an advantageous contribution to the energy balance in the shaft furnace.
  • the oil is not problem-free. Easily polluting connections are built up. Some of these compounds are already contained in the oil.
  • the oil components are expelled by the heat treatment of the mill scale that precedes the use of the mill scale. It is ' favorable to burn the escaping gases. A suitable support fire is regularly provided to ensure combustion even under unfavorable conditions.
  • the heat treatment is also used to agglomerate the mill scale by sintering. This creates larger particles that are carried in the Möller, but do not fall through between the other components of the Möller.
  • Converters are fireproof-lined melt treatment vessels, for example to carry out the wind freshening by blowing air or oxygen, in particular in the production of steel.
  • the best known converters are the Bessemer pear, the Thomas Birner, the LD converter and the Siemens Martin furnace, each designated by the associated process.
  • steel is obtained from silicon-rich pig iron in an acid-fed converter. When the pear is upright, it is refreshed by a fan wind which is fed through nozzles at the bottom of the pear. To fill the molten pig iron and to empty the liquid steel produced, the Bessemer pear is tilted into the horizontal position. The removal of sulfur and phosphorus is difficult because of the acid feed of the converter.
  • the Thomasve process is a basic wind freshening process for steel production.
  • a converter similar to the Bessemer pear is used, but here it is delivered in a basic manner, ie it is lined with dolomite stones.
  • the basic infeed enables the production of high-quality steel from phosphorus-rich pig iron.
  • the fan wind is refreshed with the pear upright through the nozzles located in the bottom of the converter blown. This oxidizes the carbon of the pig iron; then oxidized
  • the converters also allow the use of scrap and theoretically also of
  • Mill scale The use of mill scale means its oil or
  • the invention has also set itself the task of preventing environmental pollution from the oil of the mill scale.
  • the invention takes a different path than the known prior art.
  • the mill scale is encapsulated / bound in such a way that the oil is only released after its ignition temperature has been reached or has been substantially exceeded. The oil burns immediately after it is released.
  • a mixture which consists of:
  • At least one amino alcohol Component A) is preferably a zinc salt of a saturated or unsaturated fatty acid, in particular a saturated or unsaturated fatty acid having 1 to 30 carbon atoms such as palmitoleic acid, oleic acid, erucic acid, palmic acid, margaric acid, stearic acid, arachic acid or behenic acid or mixtures thereof.
  • Component A) can also include several zinc salts. At least one of the zinc salts preferably has an active content of at least 15%, in particular 17%. The active content of zinc salt indicates the stoichiometric amount of the zinc salt in aqueous solution.
  • Component (B) is at least one calcium salt of a saturated or unsaturated aliphatic or aromatic carboxylic acid.
  • Component (B) is preferably at least one calcium salt of a saturated or unsaturated fatty acid.
  • the definition of the fatty acid is as described above for component (A).
  • Component (C is at least one hydrophobizing agent, hydrophobizing agents for plasters and concrete are known. These can be used, for example, to hydrophobize building materials which contain lime and / or cement. Hydrophobing agents can react with the basic constituents of binders in accordance with the following equation:
  • radical R-COO- the radical of a saturated or unsaturated aliphatic or aromatic carboxylic acid and the radical A is an amine radical.
  • the residue of a saturated or unsaturated aliphatic or aromatic carboxylic acid is preferably a fatty acid residue.
  • the definition of the fatty acid is as described above for component (A).
  • An example of a commercially available hydrophobizing agent is a reactive agent sold under the trade name "LIGA MS" by Peter Greven Fett-Chemie GmH & Co KG Water repellents.
  • Another example of hydrophobizing agents are invert soaps, alkylammonium salts, where the alkyl radical can be saturated or unsaturated and preferably has 1 to 30 carbon atoms. If necessary, component (C) can be added in an alcohol / water mixture.
  • Component (D) is at least one amino alcohol.
  • Component (D) is preferably selected from the group consisting of mono-, di-, triethanolamine, dimethylaminoethanol, N-methyldiethanolamine, mono-, di- and triisopropanolamine, in particular triethanolamine.
  • the mixture also comprises, as component (E), NH 3
  • the mixture preferably contains 50 to 90% by weight, in particular 70 to 80% by weight, of components (A). If component (A) comprises two zinc salts, then 60 to 70% by weight, in particular 65 to 68% by weight of a first zinc salt and 5 to 15% by weight, in particular 8 to 10% by weight of a second zinc salt with an active content of at least 15%, in particular be at least 17% present.
  • the mixture preferably contains 0.1-10% by weight, in particular 2 to 5% by weight of component (B), 5 to 20% by weight, in particular 12 to 15% by weight of component (C), 0.1 to 0.7% by weight % Component (E).
  • the mixture can be diluted with a solvent. It is advantageous to maintain a concentration of the mixture of 0.1 to 0.25 in a dilution of 1: 3 to 1: 6.
  • the solvent can be selected from the group consisting of water, an alcohol and mixtures thereof.
  • the alcohol can be selected from ethanol, isopropanol, butyl alcohol.
  • the solvent is preferably a mixture of water and alcohol, which preferably consists of 85% by weight of water and 15% by weight of alcohol. Preferably 80 to 99% by weight of solvent, based on the weight of the mixture as a whole, in particular 90 to 98% by weight of solvent, are added.
  • the mixture may contain additional additives, which are preferably selected from the group consisting of agents for precipitating Heavy metals such as sodium sulfide, reducing agents such as FeSO 4 , complexing agents such as mercaptan compounds, binders such as Portland cement or pozzolanic agents such as selected combustion ashes.
  • additional additives are preferably selected from the group consisting of agents for precipitating Heavy metals such as sodium sulfide, reducing agents such as FeSO 4 , complexing agents such as mercaptan compounds, binders such as Portland cement or pozzolanic agents such as selected combustion ashes.
  • binders such as Portland cement or pozzolanic agents such as selected combustion ashes.
  • additives examples include FeC, NaHSO 3 , urea and water glass.
  • ashes are used as additional mixture components in addition to binders, ashes to absorb the water and reagents for adsorption and complex formation with the mineral hydrocarbons.
  • Absorbent additives e.g. bentonites
  • pozzolanic binders cement and incineration ash
  • the proportion of water and mineral hydrocarbons in the mixture can be 0.5 to 35% by weight.
  • the mixture according to the invention is added to the mill scale in step a).
  • the mixture according to the invention can be added undiluted or diluted with water. If the amount of oil is ⁇ 5000 mg / ton of mill scale, it is preferred to add the mixture according to the invention diluted with water, the ratio of the mixture according to the invention to water preferably being 1:20 to 1:10.
  • the amount of oil is between> 5000 mg / ton mill scale and ⁇ 50000 mg / ton mill scale, it is preferred to add the mixture according to the invention diluted with water, the ratio of the mixture according to the invention to water preferably being 1:10 to 1: 5 If the amount of oil is> 50,000 mg / ton of mill scale, it is preferred to add the mixture according to the invention diluted with water, the ratio of the mixture according to the invention to water preferably being 1: 5 to 1: 2.5.
  • the constituents are mixed in a step b).
  • Standard mixing systems or modified mixing systems can be used for mixing.
  • the energy input i.e. Mixing at higher speed, the mixing time, the mixing sequence and the control of the reaction temperature can be changed. Due to the higher energy input, a better homogenization of the mass is achieved.
  • the energy input is preferably at least about 5 amperes, in particular up to 30 amperes, and if necessary also 60 to 75 amperes.
  • the mixing time is preferably 3 to 5 minutes, optionally also 4 to 10 minutes; the reaction temperature is preferably at least 20 degrees Celsius, more preferably at least 35 degrees Celsius.
  • the grain can also be built up in 6 to 15 minutes, a grain size greater than 2 and less than 20 mm being achieved with a compressive strength of 2 to 30 N per square millimeter.
  • Binder and other pozzolanic additives are of influence here; in the exemplary embodiment, the proportion is 2 to 12% by weight of the mixture; in the exemplary embodiment, the proportion of reagents in the mixture is 0.5 to 5% by weight, the proportion of absorbent 5 to 15% by weight.
  • tixotrophic materials can also be treated with the mixture according to the invention.
  • the mixture according to the invention and optionally the additional additives can be added to the mill scale either simultaneously or in batches. In order to control the course of the reaction, the mixture and the additives can be added in batches in succession. The goal is a defined intermediate product. If the mixture according to the invention is added in several batches during mixing, the temperature and the pH of the resulting mixture can also be checked between the individual addition stages. Provided an implementation of the oil is desired, the implementation can be checked based on the measured values.
  • the treated mill scale can be mixed with a hydraulic binder in step c).
  • the hydraulic binder can be selected from the group consisting of cement, alumina and Portland cement.
  • the mixture according to the invention not only encapsulates the oil but also its chemical incorporation and a change in the physical properties of the mill scale sludge. Everything contributes to the delayed outgassing of the oil in the shaft furnace.
  • the moisture is absorbed and / or the density of the material is increased.
  • the compression is achieved by pelleting.
  • the particle size achieved with pelleting is 2 to 30 mm, preferably 15 mm.
  • the pelleting increases the compressive strength and reduces the permeability.
  • the surface of the pellets is solidified and the diffusion of the enclosed mineral hydrocarbons is greatly reduced.
  • a compressive strength of at least 15 Nmm2 is preferably achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
  • Lubricants (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Glanulating (AREA)

Abstract

Selon la présente invention, de la calamine chargée d'huile est traitée de sorte que l'huile se trouve encapsulée ou intégrée, et provoque un dégazage d'huile lors de l'utilisation dans un four à cuve, seulement lorsque le point d'inflammation est atteint ce qui permet de garantir une combustion.
EP01974103A 2000-08-03 2001-08-02 Valorisation de calamine chargee d'huile dans des fours a cuve et des convertisseurs Withdrawn EP1409752A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10038566 2000-08-03
DE10038566A DE10038566A1 (de) 2000-08-03 2000-08-03 Verwertung von ölbelastetem Walzenzunder in Schachtöfen und Konvertern
PCT/EP2001/008984 WO2002012573A2 (fr) 2000-08-03 2001-08-02 Valorisation de calamine chargee d'huile dans des fours a cuve et des convertisseurs

Publications (1)

Publication Number Publication Date
EP1409752A2 true EP1409752A2 (fr) 2004-04-21

Family

ID=7651648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01974103A Withdrawn EP1409752A2 (fr) 2000-08-03 2001-08-02 Valorisation de calamine chargee d'huile dans des fours a cuve et des convertisseurs

Country Status (5)

Country Link
US (1) US7014678B2 (fr)
EP (1) EP1409752A2 (fr)
DE (1) DE10038566A1 (fr)
RU (1) RU2003105886A (fr)
WO (1) WO2002012573A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323902B4 (de) 2003-05-26 2005-05-25 Loesche Gmbh Brennstoffgemisch zur Zuführung in Blasformen bei der Roheisenerzeugung im Hochofen und Verfahren zur Herstellung und Zuführung des Brennstoffgemisches
EP1765971A4 (fr) * 2004-06-12 2009-07-01 Iron Mount Corp Procede et appareil permettant d'executer un processus metallurgique
WO2011001282A2 (fr) 2009-06-29 2011-01-06 Bairong Li Procédés de réduction de métaux, procédés métallurgiques et produits et dispositifs
CN109385522A (zh) * 2018-12-18 2019-02-26 攀钢集团攀枝花钢铁研究院有限公司 一种氧化铁皮渣球团及其制备方法和应用

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4585475A (en) * 1980-06-25 1986-04-29 Inland Steel Company Method for recycling oily mill scale
DE3632364C2 (de) * 1986-09-24 1995-12-07 Boelsing Friedrich Verfahren zur Gewinnung von Sekundärrohstoffen
DE4101584A1 (de) * 1991-01-21 1992-07-23 Saar Kokerei Gmbh Verfahren zur aufbereitung von walzenzunder
US5186742A (en) * 1991-11-27 1993-02-16 Chemical Lime Company Method and composition for use in recycling metal containing furnace dust
DE4329630A1 (de) * 1993-08-02 1995-02-09 Georg Von Bormann Verfahren zum Aufbereiten von verölten mit Wasser beaufschlagten, eisenhaltigen Einsatzmaterialien
DE4432721A1 (de) * 1994-09-14 1996-03-21 Hans Ruf Verfahren zur Herstellung von eisenhaltigen Briketts
US5885328A (en) * 1996-05-31 1999-03-23 Ltv Steel Company, Inc. Method of agglomerating oil-containing steel mill waste
FR2760664B1 (fr) * 1997-03-12 1999-06-04 Agglocentre Liant pour l'agglomeration de fines industrielles, procede d'agglomeration de fines industrielles a l'aide du liant et moyens pour la mise en oeuvre du procede

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0212573A2 *

Also Published As

Publication number Publication date
WO2002012573A2 (fr) 2002-02-14
WO2002012573A3 (fr) 2002-11-14
RU2003105886A (ru) 2004-12-27
DE10038566A1 (de) 2002-03-21
US7014678B2 (en) 2006-03-21
US20030172777A1 (en) 2003-09-18

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