WO2003035913A1 - Procede et dispositif pour refroidir du laitier de poche et du laitier de convertisseur - Google Patents

Procede et dispositif pour refroidir du laitier de poche et du laitier de convertisseur Download PDF

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Publication number
WO2003035913A1
WO2003035913A1 PCT/DE2002/002642 DE0202642W WO03035913A1 WO 2003035913 A1 WO2003035913 A1 WO 2003035913A1 DE 0202642 W DE0202642 W DE 0202642W WO 03035913 A1 WO03035913 A1 WO 03035913A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
immersion
collecting container
heat
immersion body
Prior art date
Application number
PCT/DE2002/002642
Other languages
German (de)
English (en)
Inventor
Egon Evertz
Rolf Seybold
Original Assignee
Egon Evertz K.G (Gmbh Und Co.)
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 Egon Evertz K.G (Gmbh Und Co.) filed Critical Egon Evertz K.G (Gmbh Und Co.)
Publication of WO2003035913A1 publication Critical patent/WO2003035913A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/064—Thermally-conductive removable bodies, e.g. balls
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/072—Tanks to collect the slag, e.g. water tank
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the invention relates to a method for cooling ladle and / or converter slags by means of heat removal.
  • the invention further relates to an apparatus for performing this method.
  • slags accumulate on the bathroom mirror, which contain undesirable companions for the end products and are therefore removed from time to time as required.
  • the quantities of slag are collected in a collecting container which, according to the prior art, is emptied by pouring out.
  • the slags are poured into a bunker or on a heap and brought to cool and solidify by spraying with water.
  • the risk of explosion can be reduced by using large water flows, precautions must then be taken in order to discharge the large amounts of water again.
  • Correspondingly large, space-consuming decanting tanks or drainage drums can be used for this.
  • such measures including the associated costs, prove to be too expensive.
  • a device for wet granulation of liquid slag which comprises a granulating basin with an injection device for the granulating water, a decanting basin separated from the granulating basin, in which the slag settles as granulate, and a device for introducing the granulate water Contains mixture from the granulating basin into the decanting basin, the device for introducing the granulate-water mixture from the granulating basin into the decanting basin comprises at least one elongated distribution channel which extends over the decanting basin. The underside of the distribution channel has flow agents distributed over its length over the granulate / water mixture.
  • a vertical, downwardly open inflow shaft is formed below the at least one distribution channel, into which the outflow means for the granulate / water mixture open.
  • WO 00/50647 discloses a process for granulating and comminuting liquid slags, in which liquid slags are introduced into an expansion chamber and a cooling zone, the liquid slag being sucked into an expansion chamber which is under vacuum and transported into the cooling zone with a propellant jet becomes.
  • High-pressure water with a pressure of over 50 bar or superheated steam with temperatures of over 800 ° C is used as the driving jet.
  • WO 99/42623 describes a method for granulating and comminuting liquid slags, in particular blast furnace slags, with water, in which a pressurized water jet is directed into the slag.
  • gases in particular oxygen, air and / or oxygen-inert gas mixtures, are to be dissolved in the slag prior to the discharge, iron portions of the slag being oxidized quantitatively, the slag being pressed out through the slag opening with the pressure of the pressurized water, and as the jacket of the Pressurized water jet is ejected.
  • Pressurized water pressures to be applied are between 35 bar and 160 bar.
  • the slag is poured into a collecting container, after which one or more immersion bodies made of copper or a copper alloy are then immersed in the still liquid slag, which absorb part of the heat of the slag due to their lower temperature and that after at least one im heat balance between the slag and the immersion body (s), the immersion body (s) being withdrawn again from the slag.
  • the advantage of this process is that, due to the good thermal conductivity of copper, rapid heat transfer from the slag to the immersion body is possible, which is accompanied by a significant drop in temperature of the slag.
  • the immersion body (s) it is no longer even necessary for the immersion body (s) to be completely immersed in the slag, since the time until the next slag tapping is sufficiently long to bring about the desired slag cooling.
  • the size of the immersion body and thus the heat absorption capacity depends on the amount of slag to be cooled and the lowering of the slag temperature that is desired.
  • the slag temperature can easily be reduced from originally about 1200 ° C to 600 ° C.
  • the cooling process is repeated several times, the immersion body or bodies being cooled between the individual dives, preferably in a water bath.
  • This measure allows the temperature of the slag to be gradually reduced further in repeated operations.
  • the slag collecting container has a holding capacity for several, separately occurring slag batches which are entered intermittently at intervals until the filling is at least substantially complete, the immersion body or the immersion bodies being immersed one or more times between the individual filling processes /become.
  • the slag temperature of the first batch can be cooled to significantly lower temperatures than 300 ° C., for example by repeated dives.
  • the next batch of slag is then added to the cooled amount of slag already present in the collecting container, the slag filling preferably being carried out without major mixing with the slag already present in the collecting container.
  • This newly filled amount of slag has a temperature on its surface which is also about 1200 ° C.
  • the immersion body which has a temperature corresponding to the ambient temperature, is now at least partially immersed in the uppermost slag layer, as a result of which heat is transferred to the immersion body and the slag temperature is accordingly reduced.
  • This diving process can also be repeated several times, with the diving body being cooled in a water bath between the individual dives. Depending on the absorption capacity of the collecting container and the discontinuous amount of slag, four batches can be taken up and cooled, for example, until the collecting container is filled, before the collecting container with the significantly cooled slag is replaced by a new empty collecting container.
  • the immersion body is adapted in terms of its geometric dimensions and / or its heat capacity and thermal conductivity to the respective amount of slag batch to be cooled.
  • the immersion body is made of copper or a copper alloy.
  • the immersion body can, for example, have a cuboid shape, the immersing cuboid surface is only slightly smaller than the cross-sectional area of the receptacle.
  • the device described in claim 5 is used, in which a collecting container is arranged below a pouring device for the resulting slag, which is preferably movable.
  • a collecting container is arranged below a pouring device for the resulting slag, which is preferably movable.
  • at least one immersion body attached to a lifting device is provided, which can be lowered into the interior of the collecting container.
  • the lifting device can be moved horizontally and lowered into a coolant bath, preferably a water bath.
  • the immersion body is preferably a plate or a ball and has dimensions to essentially cover the inner cross section of the collecting container. This provides the largest possible area of the immersion body over which heat transfer can take place.
  • Several individual immersion bodies of the same or different sizes can be attached to the lifting device, e.g. several pear-shaped immersion bodies, at different heights, so that the immersion bulbs hanging below immerse completely and the ones above them only partially in the slag bath.
  • Fig. 1 is a schematic diagram with a pouring spout, a movable collecting container and indicated immersion bodies and
  • Fig. 2 shows an alternative embodiment of a device with several
  • the discontinuously occurring slag is poured from a collecting container 10, possibly by means of a scraper, into a collecting container 11, which is designed here as a movable carriage (see arrow 12).
  • a cuboidal immersion body 14 is then immersed in the first batch of slag 13 by means of a lifting device (not shown), which absorbs part of the heat quantity of the slag. Since the immersion body consists of a solid copper body, the heat balance takes place relatively quickly.
  • the immersion body which in the arrangement shown in FIG. 1 is a cuboid, remains immersed until heat compensation between the slag and the immersion body has taken place at least approximately.
  • the immersion body is lifted out of the interior of the collecting container after the first dive, for example by means of an electric pulley block (lower belt trolley), moved sideways and lowered into a water bath (not shown) , after which the dive is repeated several times according to the time available until the next batch of slag and the desired slag temperature.
  • an electric pulley block lower belt trolley
  • the next batch of slag can then be poured into the collecting container 11, which is cooled in the same way by at least one dive.
  • the process is repeated until the holding capacity of the collecting container 11 is reached, after which the collecting container is moved away and replaced by a new collecting container.
  • the particular advantage of the method according to the invention or the device according to the invention is that a considerable number of movable collecting containers can be saved, since the slag that has been removed has already undergone a temperature reduction which enables problem-free further processing into slag granules. Downtimes for intermediate cooling of the slag before it is processed and processed into granules can thus be saved.
  • a diving body according to FIG. 2 can also be used instead of the diving body 14.
  • a Hener support beam 15 as a suspension for several, here approximately spherical immersion bodies 16 and 17, which have a different size in the illustrated embodiment.
  • the immersion bodies are arranged in a staggered manner in height. The size of the immersion body 14 or the immersion bodies 16, 17 ultimately depends on the respective amount of slag to be cooled and its temperature.
  • the immersion bodies preferably consist of a solid copper material or a suitable copper alloy, which ensures that no slag bakes on the immersion body or the immersion bodies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Manufacture Of Iron (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour refroidir du laitier de poche et/ou du laitier de convertisseur par extraction de chaleur. Selon l'invention, le laitier est coulé dans un collecteur dans lequel on plonge, alors que le laitier est encore à l'état liquide, au moins un corps à immerger constitué de cuivre ou d'un alliage de cuivre, lequel, en raison de sa température plus basse, absorbe une partie de la chaleur du laitier. Quand l'équilibre calorifique est atteint au moins partiellement, le ou les corps immergés sont retirés du laitier.
PCT/DE2002/002642 2001-09-28 2002-07-18 Procede et dispositif pour refroidir du laitier de poche et du laitier de convertisseur WO2003035913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001148152 DE10148152B4 (de) 2001-09-28 2001-09-28 Verfahren und Vorrichtung zum Kühlen von Pfannen- und Konverterschlacken
DE10148152.7 2001-09-28

Publications (1)

Publication Number Publication Date
WO2003035913A1 true WO2003035913A1 (fr) 2003-05-01

Family

ID=7700807

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/002642 WO2003035913A1 (fr) 2001-09-28 2002-07-18 Procede et dispositif pour refroidir du laitier de poche et du laitier de convertisseur

Country Status (2)

Country Link
DE (1) DE10148152B4 (fr)
WO (1) WO2003035913A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107699646A (zh) * 2017-11-16 2018-02-16 中冶沈勘秦皇岛工程设计研究总院有限公司 不锈钢渣粒化装置及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123991A (en) * 1976-04-12 1977-10-18 Kawasaki Heavy Ind Ltd Cooling method for slag
JPS5419497A (en) * 1977-07-13 1979-02-14 Kawasaki Heavy Ind Ltd Apparatus for recovering heat from molten slag
US4177974A (en) * 1977-08-17 1979-12-11 Nippon Kokan Kabushiki Kaisha Molten slag runner for blast-furnace plant
JPS5594405A (en) * 1979-01-11 1980-07-17 Nippon Kagaku Gijutsu Kenkyusho:Kk Waste heat recovery apparatus of slag
DE3439272A1 (de) * 1984-10-26 1986-05-07 Didier Engineering Gmbh, 4300 Essen Vorrichtung zur rueckgewinnung des waermeinhaltes von schmelzprodukten

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19519284C1 (de) * 1995-05-22 1996-08-01 Mannesmann Ag Verfahren und Anlage zum Kühlen und Abtransport von Pfannen- und Konverterschlacken
CZ9903530A3 (cs) * 1998-02-18 2000-10-11 Holderbank Financiere Glarus Ag Způsob granulace a rozmělnění tekutých strusek a zařízení k jeho provádění
LU90255B1 (de) * 1998-06-26 2000-01-03 Wurth Paul Sa Vorrichtung zum nassgranulieren von fluessiger Schlacke
AT406954B (de) * 1999-02-24 2000-11-27 Holderbank Financ Glarus Verfahren zum granulieren und zerkleinern von flüssigen schlacken sowie vorrichtung zur durchführung dieses verfahrens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123991A (en) * 1976-04-12 1977-10-18 Kawasaki Heavy Ind Ltd Cooling method for slag
JPS5419497A (en) * 1977-07-13 1979-02-14 Kawasaki Heavy Ind Ltd Apparatus for recovering heat from molten slag
US4177974A (en) * 1977-08-17 1979-12-11 Nippon Kokan Kabushiki Kaisha Molten slag runner for blast-furnace plant
JPS5594405A (en) * 1979-01-11 1980-07-17 Nippon Kagaku Gijutsu Kenkyusho:Kk Waste heat recovery apparatus of slag
DE3439272A1 (de) * 1984-10-26 1986-05-07 Didier Engineering Gmbh, 4300 Essen Vorrichtung zur rueckgewinnung des waermeinhaltes von schmelzprodukten

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 197912, Derwent World Patents Index; Class M24, AN 1979-22857B, XP002222225 *
PATENT ABSTRACTS OF JAPAN vol. 002, no. 024 (C - 003) 16 February 1978 (1978-02-16) *
PATENT ABSTRACTS OF JAPAN vol. 004, no. 144 (C - 027) 11 October 1980 (1980-10-11) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107699646A (zh) * 2017-11-16 2018-02-16 中冶沈勘秦皇岛工程设计研究总院有限公司 不锈钢渣粒化装置及方法
CN107699646B (zh) * 2017-11-16 2023-02-21 中冶沈勘秦皇岛工程设计研究总院有限公司 不锈钢渣粒化装置及方法

Also Published As

Publication number Publication date
DE10148152A1 (de) 2003-04-17
DE10148152B4 (de) 2010-04-08

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