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EP1068363A1 - Procede et dispositif pour la granulation et la fragmentation de scories liquides - Google Patents

Procede et dispositif pour la granulation et la fragmentation de scories liquides

Info

Publication number
EP1068363A1
EP1068363A1 EP00900447A EP00900447A EP1068363A1 EP 1068363 A1 EP1068363 A1 EP 1068363A1 EP 00900447 A EP00900447 A EP 00900447A EP 00900447 A EP00900447 A EP 00900447A EP 1068363 A1 EP1068363 A1 EP 1068363A1
Authority
EP
European Patent Office
Prior art keywords
slag
cooling reactor
liquid
tundish
hydrocarbons
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Withdrawn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
EP00900447A
Other languages
German (de)
English (en)
Inventor
Alfred Edlinger
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.)
Holcim Ltd
Original Assignee
Holcim Ltd
Holderbank Financiere Glarus AG
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 Holcim Ltd, Holderbank Financiere Glarus AG filed Critical Holcim Ltd
Publication of EP1068363A1 publication Critical patent/EP1068363A1/fr
Withdrawn legal-status Critical Current

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
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
    • 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 granulating and crushing liquid slags such.
  • the invention aims to provide a method of the type mentioned at the beginning in which the use of water or water vapor for cooling can be avoided entirely and it can also be ensured that water or water vapor is not formed in the course of the combustion processes becomes. Furthermore, the invention aims to control and regulate the process in a comparatively simple manner in order to ensure reproducible conditions irrespective of the choice of the slag to be granulated or comminuted. Finally, the invention aims to maintain a correspondingly high temperature in the slag inlet or the slag tundish, in which the liquid slag is kept in stock, which reliably prevents freezing or clogging of the outlet opening.
  • the method according to the invention consists in that the slag jet with hot combustion exhaust gases, in particular complete combustion, is expelled into the cooling reactor. Because the slag jet is ejected into the cooling reactor with hot combustion exhaust gases, in particular complete combustion, a relatively high temperature level can be specified on the one hand without uncontrolled combustion occurring in the area of the outlet opening of a slag tundish.
  • the hot combustion gases particularly when they are combustion gases from a complete combustion, can be described as largely inert and therefore do not trigger any chemical reactions in the area of the outlet of the slag jet.
  • Such hot combustion gases consist primarily of carbon dioxide and nitrogen, the combustion gases being largely free of oxygen, so that with such a procedure the addition of hydrocarbons for cooling results particularly advantageously in an efficient cooling effect and at the same time prevents one such addition of hydrocarbon water vapor or water is formed.
  • carbon dioxide as the propellant or transport gas for the liquid slag
  • a reaction with Hydrocarbons to carbon monoxide and hydrogen can be achieved, the formation of water vapor or water can be excluded with certainty if no increased oxygen supply is available and consequently no water or water vapor is injected for further cooling.
  • a valuable product gas namely carbon monoxide and hydrogen, is formed, which can subsequently be used thermally or chemically, so that overall the energy efficiency is significantly improved.
  • the specified enthalpies are based on the production of a standard cubic meter of CO + H2.
  • the gasification reaction in the cooling reactor leads to a corresponding increase in the amount of gas and thus the pressure and to an acceleration of the slag granules, the conversion taking place directly to synthesis gas or water gas.
  • the overall process can be controlled much more easily in this way, with only a corresponding stoichiometry being provided in order to optimize the energetic use. It is therefore advantageous to proceed in such a way that the amount of CO2 in the hot combustion exhaust gas is selected stoichiometrically according to the amount of hydrocarbon blown.
  • a large amount of propellant gas is made available due to the gasification reaction taking place in the cooling reactor, which allows, as in a preferred embodiment of the method according to the invention, to proceed in such a way that the solidified and cooled slag drops at temperatures above 500 ° and below 800 ° C are discharged together with the CO and H2 formed into a mill, in particular a jet mill, and that the CO and H2 are drawn off.
  • the device according to the invention for carrying out the method requires a slag tundish with a slag outlet opening to which a cooling reactor is connected.
  • the device can be designed according to the invention such that burners are arranged above the slag bath, that the slag tundish can be closed in a pressure-tight manner and that lines for the hydrocarbons are connected to the cooling reactor.
  • the device can be designed in such a way that a combustion chamber or an internal combustion engine, in particular a turbine combustion chamber, is arranged outside the slag tundish and that the hot combustion exhaust gases are fed to a lance directed towards the liquid slag bath or immersed in the liquid slag bath.
  • a combustion chamber or an internal combustion engine in particular a turbine combustion chamber
  • the slag tundish can be appropriately pressure-tightly closed in order to ensure the pressure required for the safe discharge of the liquid slag into the cooling reactor.
  • the slag bath is heated accordingly by such burners, so that the slag can be safely kept in the liquid phase.
  • the combustion can in each case be carried out optimally in order to achieve a largely complete combustion, which also ensures a better energetic use of the fuels used.
  • the use of a turbine combustion chamber leads directly to the required pressure level of about 2 to 5 bar, so that the use of a simple lance immersed in the slag bath for the safe discharge of the liquid slag into the cooling reactor becomes possible without the risk that the outlet openings of the slag tundish subsequently move.
  • the previously used steam or pressurized water can be completely dispensed with in the device according to the invention, so that hydration reactions can be excluded.
  • a high-quality product gas namely carbon monoxide and hydrogen, can be formed, so that the energy balance of the method and the device according to the invention is significantly improved.
  • 1 denotes a slag tundish in which a bath of liquid slag, for example liquid blast furnace slag, is contained.
  • the liquid level is designated 2 here.
  • the tundish 1 can, as indicated by the dash-dotted line 3, be sealed off.
  • burners indicated schematically by 4
  • the energy required to maintain the liquid phase and the pressure required to expel the slag through the tubular one Opening 5 are constructed, to which a cooling reactor 6 is connected.
  • 7 denotes a lance for hot combustion exhaust gases, which dips into the slag bath and is used as a jacket for such a hot exhaust gas flow through the opening 5 for the discharge of the liquid slag.
  • the slag inflow can be regulated accordingly by a height-adjustable, tubular weir 8.
  • the liquid slag droplets with diameters between 10 and 60 ⁇ and temperatures of about 1200 to 1400 ° enter the cooling reactor and are essentially over radially inwardly directed nozzles 9 acted upon by hydrocarbons.
  • the CO 2 injected via the lance 7 converts with the hydrocarbons to CO and H2, with the corresponding increase in volume also resulting in a corresponding pressure build-up, which largely discharges the material solidified particles via a passage 10 in a jet mill 11 allows.
  • the flow energy can be converted directly in the jet mill.
  • Fission gas is withdrawn from the jet mill 11 as a product gas via the line 12, the granules obtained in each case being able to be discharged via cellular wheel locks 13 at temperatures of approximately 600 ° C.
  • Hydrocarbon, and in particular Ci-io hydrocarbons are introduced by introducing such hydrocarbons into a ring line 14 to which the nozzles 9 are connected.
  • the outlet opening 5 can be heated or cooled in a conventional manner in order to optimize the wear accordingly.
  • a ring insert 15 through which a fluid can flow can be seen.

Landscapes

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

Abstract

L'invention concerne un procédé de granulation et de fragmentation de scories liquides, selon lequel le jet de scories est expulsé dans un réacteur de refroidissement où il est refroidi avec addition d'hydrocarbures. Le jet de scories est expulsé dans le réacteur de refroidissement avec des gaz de combustion chauds, en particulier résultant d'une combustion complète, ce qui entraîne une conversion en CO et H2. Dans le dispositif utilisé pour mettre en oeuvre ledit procédé, qui comprend un avant-creuset (1) et une ouverture de sortie de scories (5) et auquel est raccordé un réacteur de refroidissement (6), des brûleurs (4) sont disposés au-dessus du bain de scories. L'avant-creuset (1) peut être fermé de façon à résister à la pression. Des conduits (14) sont raccordés au réacteur de refroidissement (6) pour l'amenée des hydrocarbures. Selon une variante, les gaz de combustion chauds d'un moteur à combustion interne sont insufflés dans les scories liquides par l'intermédiaire d'une lance (7).
EP00900447A 1999-01-28 2000-01-13 Procede et dispositif pour la granulation et la fragmentation de scories liquides Withdrawn EP1068363A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT6099U 1999-01-28
AT6099 1999-01-28
PCT/AT2000/000007 WO2000044942A1 (fr) 1999-01-28 2000-01-13 Procede et dispositif pour la granulation et la fragmentation de scories liquides

Publications (1)

Publication Number Publication Date
EP1068363A1 true EP1068363A1 (fr) 2001-01-17

Family

ID=3480473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00900447A Withdrawn EP1068363A1 (fr) 1999-01-28 2000-01-13 Procede et dispositif pour la granulation et la fragmentation de scories liquides

Country Status (2)

Country Link
EP (1) EP1068363A1 (fr)
WO (1) WO2000044942A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408437B (de) * 2000-02-22 2001-11-26 Holderbank Financ Glarus Einrichtung zum zerstäuben von flüssigen schmelzen
AT408956B (de) * 2000-05-11 2002-04-25 Tribovent Verfahrensentwicklg Einrichtung zur erzeugung eines heissen treibgasstromes
AT409864B (de) * 2001-01-25 2002-12-27 Tribovent Verfahrensentwicklg Verfahren zum granulieren von schmelzflüssigen schlacken sowie vorrichtung zur durchführung dieses verfahrens
AT410102B (de) * 2001-02-27 2003-02-25 Tribovent Verfahrensentwicklg Einrichtung zum zerstäuben von schmelzen
AT410099B8 (de) * 2001-03-14 2003-02-25 Tribovent Verfahrensentwicklg Verfahren zum granulieren von schlacken
AT410100B (de) * 2001-05-10 2003-01-27 Tribovent Verfahrensentwicklg Einrichtung zum granulieren, zerstäuben und zerkleinern von flüssigen schmelzen
AT410675B (de) * 2001-10-19 2003-06-25 Tribovent Verfahrensentwicklg Vorrichtung zum granulieren von oxidischen schlacken
AT410676B (de) * 2001-10-23 2003-06-25 Tribovent Verfahrensentwicklg Verfahren und vorrichtung zum granulieren und zerkleinern von flüssigen schmelzen
AT411362B (de) * 2002-08-29 2003-12-29 Tribovent Verfahrensentwicklg Verfahren zum zerstäuben und granulieren von schmelzen sowie vorrichtung zur durchführung dieses verfahrens
CN113981159A (zh) * 2021-10-08 2022-01-28 中冶南方工程技术有限公司 一种利用高炉渣余热的富氢冶炼系统及方法
CN115109620B (zh) * 2022-07-01 2024-09-24 杭州吉幔铁氢能科技有限公司 铅铋液为冷凝介质的熔铁浴合成气降温除尘装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009024A (en) * 1975-09-26 1977-02-22 Koppers Company, Inc. Process for regeneration and reuse of steelmaking slag
JPS55154310A (en) * 1979-05-19 1980-12-01 Nippon Steel Corp Method and apparatus for manufacturing carbon monoxide using molten slag
LU81385A1 (de) * 1979-06-15 1981-02-03 Arbed Verfahren und vorrichtung zur herstellung von schlackenwolle aus hochofenschlacken
JPS57134501A (en) * 1981-02-13 1982-08-19 Nippon Steel Corp Method for recovery of sensible heat of blast furnace slag
JPS6141884A (ja) * 1984-08-03 1986-02-28 住友金属工業株式会社 冶金滓の顕熱回収方法
DE19632698A1 (de) * 1996-08-14 1998-02-19 Forschungsgemeinschaft Eisenhu Verfahren zur Herstellung von Hüttensand mit geringer Partikelgröße

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0044942A1 *

Also Published As

Publication number Publication date
WO2000044942A1 (fr) 2000-08-03

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