[go: up one dir, main page]

WO2025137750A1 - Système et procédé de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique, et four sidérurgique pour la fabrication de fonte brute et la séparation de particules métalliques fines - Google Patents

Système et procédé de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique, et four sidérurgique pour la fabrication de fonte brute et la séparation de particules métalliques fines Download PDF

Info

Publication number
WO2025137750A1
WO2025137750A1 PCT/BR2024/050574 BR2024050574W WO2025137750A1 WO 2025137750 A1 WO2025137750 A1 WO 2025137750A1 BR 2024050574 W BR2024050574 W BR 2024050574W WO 2025137750 A1 WO2025137750 A1 WO 2025137750A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal particles
fine metal
particle separator
separator element
furnace
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.)
Pending
Application number
PCT/BR2024/050574
Other languages
English (en)
Portuguese (pt)
Inventor
Stephen Michael POTTER
Ronald Lopes DE OLIVEIRA
Guilherme Francisco GONÇALVES
Manoel Vítor Borel GONÇALVES
André Silva DA LUZ
Pedro Henrique Ferreira BRAGA
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.)
Tecnored Desenvolvimento Tecnologico SA
Original Assignee
Tecnored Desenvolvimento Tecnologico SA
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
Priority claimed from BR102023027583-4A external-priority patent/BR102023027583B1/pt
Application filed by Tecnored Desenvolvimento Tecnologico SA filed Critical Tecnored Desenvolvimento Tecnologico SA
Publication of WO2025137750A1 publication Critical patent/WO2025137750A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/18—Arrangements of dust collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases
    • F27D17/22—Arrangements for treatment or cleaning of waste gases for removing solid constituents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C21B11/02—Making pig-iron other than in blast furnaces in low shaft furnaces or shaft furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/16—Arrangements of tuyeres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases
    • F27D17/22—Arrangements for treatment or cleaning of waste gases for removing solid constituents
    • F27D17/25—Arrangements for treatment or cleaning of waste gases for removing solid constituents using cyclones

Definitions

  • the present invention relates to a system and method applied to steelmaking. Specifically, the present invention relates to a system and method for manufacturing pig iron and fine metal particles.
  • Fine metal particles such as metal particles comprising essentially zinc particles, are especially problematic for the operation of steel furnaces and blast furnaces in the production of pig iron.
  • Prior art steel furnaces generally have a load limiting control of these fine metal particles, so as to avoid a recirculation flow within the furnace between a vapor and condensate state that is detrimental to the operation of the steel furnace.
  • Some steel furnaces have an operating temperature that allows some of these particles to be volatilized. In these furnaces, these particles evaporate in hotter regions, but as soon as the vapors from these fine metal particles come into contact with cooler/higher regions, the fine metal particles begin to condense and deposit on the cold surface.
  • An example of a colder region of the furnace is its top; state-of-the-art steel furnaces generally have a top temperature of around 150 °C, which is too low to volatilize the fine metal particles.
  • the maximum zinc content accepted in blast furnace operation is close to 150 g of zinc per ton of hot metal produced.
  • This process means that the steel furnace has to have its operation interrupted frequently, which is unfeasible for the reactor's productivity.
  • patent document BR 10 2013 033702 1 Bl describes a metallurgical furnace capable of operating with a wide range of raw materials and fuels, including those with high levels of impurities.
  • the metallurgical furnace comprises (i) at least one upper tank, (ii) at least one lower tank, (iii) at least one fuel feeder positioned substantially between the at least one upper tank and the at least one lower tank, (iv) at least one row of tuyeres positioned in at least one of the at least one upper tank and the at least one lower tank, the at least one row of tuyeres fluidly communicating the interior of the furnace with the external environment, and (v) at least one burner positioned in at least one of the at least one upper tank and the at least one lower tank, the use of at least one burner in conjunction with the at least one row of tuyeres generates a very intense release of heat due to the exothermic reactions that occur through this combination.
  • Patent document BR 11 2017 012467 0 Bl describes a metallurgical furnace capable of operating with a wide range of raw materials and fuels, including those with high levels of impurities.
  • the metallurgical furnace comprises (i) at least one upper tank, (ii) at least one lower tank, (iii) at least one fuel feeder positioned substantially between the at least one upper tank and the at least one lower tank, (iv) at least one row of tuyeres positioned in at least one of at least one upper tank and at least one lower tank, at least one row of tuyeres fluidly communicating the interior of the furnace with the external environment, (v) at least one hood called Curtain Wall located in the upper tank that extends longitudinally through the furnace, and (vi) at least one permeabilizing fuel charging system in the center of the upper tank called a booster charging system.
  • the use of the booster charging system together with the Curtain Wall allows channeling of the gas generated in the combustion of the fuel in the lower tank with the air blown through the primary tuyeres and secondary tuyeres, controlling the gas distribution in the furnace more efficiently.
  • the production of metal alloys from fine metal particles, such as zinc particles is commonly done using a Waelz furnace.
  • the process that uses the Waelz furnace to concentrate zinc is a pyrometallurgical route to recover zinc from materials/co-products that contain zinc, mainly in the form of zincite (ZnO) and/or franklinite (ZnFeiC), such as electric steel mill dust.
  • This process involves feeding the residue into a rotary kiln, where it is heated to temperatures close to 1200°C.
  • the zinc present in the residue is reduced and reoxidized, being collected in a dust collection system.
  • the prior art fails to disclose a system and method for separating fine metal particles from a steel furnace top gas that enables the recovery of fine metal particles, like zinc, from the top gas.
  • a first objective of the present invention is to solve this technical problem by providing a system and method for separating fine metal particles from a steel furnace top gas.
  • a second objective of the present invention is to solve this technical problem by providing a steel furnace for manufacturing pig iron and separating fine metal particles.
  • a third object of the present invention is to provide a steelmaking furnace for manufacturing pig iron and separating fine metal particles as an alternative to the Waelz furnace.
  • a fourth objective of the present invention is to provide a steelmaking furnace for manufacturing pig iron and separating fine metal particles that can be fed with material rich in fine metal particles without compromising the operation of the steelmaking furnace.
  • the present invention relates to a system for separating fine metal particles from a top gas of a steelmaking furnace, comprising: at least one gas transport channel configured to transport the top gas out of the steelmaking furnace; at least one coarse particle separator element for separating coarse particles from the top gas; at least a first collection tank coupled downstream of the at least one coarse particle separator element; at least one fine particle separator element for separating fine metal particles from the top gas; and at least a second collection tank coupled downstream of the at least one fine particle separator element, wherein the at least one second collection tank is configured to receive a slurry comprising the fine metal particles separated from the top gas; wherein the at least one gas transport channel connects the at least one first collection tank to the at least one second collection tank. downstream of the steel furnace, at least one coarse particle separator element and at least one fine particle separator element.
  • the present invention relates to a system for separating fine metal particles from an overhead gas of a steelmaking furnace 20, comprising: at least one gas transport channel 10 configured to transport the overhead gas out of the steelmaking furnace 20; at least one coarse particle separator element 11 for separating coarse particles from the overhead gas; at least a first collection tank 12 coupled downstream of the at least one coarse particle separator element 11; at least one fine particle separator element 13 for separating fine metal particles from the overhead gas; and at least a second collection tank 14 coupled downstream of the at least one fine particle separator element 13, wherein the at least one second collection tank 14 is configured to receive a slurry comprising the fine metal particles separated from the overhead gas; wherein the at least one gas transport channel 10 connects downstream the steelmaking furnace 20, the at least a coarse particle separator element 11 and the at least one fine particle separator element 13.
  • Figure 1 illustrates the fine metal particle separation system of the present invention.
  • Figure 1 illustrates the at least one coarse particle separator element 11 for separating coarse particles from overhead gas, at least a first collection tank 12 coupled downstream of the at least one coarse particle separator element 11, at least one fine particle separator element 13 for separating fine metal particles from overhead gas, and at least a second collection tank 14 coupled downstream of the at least one fine particle separator element 13.
  • the at least one gas transport channel 10 is coupled to the top of the steel furnace 20 to capture the gases expelled by the furnace 20 and transport them to the at least one coarse particle separator element 11.
  • the at least one coarse particle separator element 11 is a cyclone.
  • the at least one coarse particle separator element 11 there is separation of coarse particles from the overhead gas pool and fine metal particles by vortex separation using rotational and gravitational effects. Coarse solid particles tend to hit the inner walls of the at least one coarse particle separator element and lose speed, falling to the bottom of the underflow element, where they settle in at least a first collection tank 12.
  • the at least one first collection tank 12 is coupled downstream of the at least one coarse particle separator element 11 and is where the collection of coarse particles occurs.
  • the fine metal particles and the lighter top gas are forced upwards, by means of the formation of a negative pressure in the center of the vortex, and expelled in the upper region of the at least one coarse particle separator element 11, where they are transported by at least one gas transport channel 10 to the at least one fine particle separator element 13.
  • the coarse particles deposited in the at least one first collection tank 12 have a low concentration of fine metal particles, so that the gas that goes to the at least one fine particle separator element 13 remains with a high concentration of fine metal particles.
  • the at least one fine particle separator element 13 is a venturi scrubber.
  • atomization of a scrubbing liquid occurs, in which the scrubbing liquid is injected to separate the fine metal particles from the overhead gas inserted in this element.
  • this scrubbing liquid is responsible for capturing the fine metal particles from the overhead gas.
  • the scrubbing liquid is water. The fine metal particles are separated from the overhead gas due to the phenomenon of difference in exit velocity of the gas particles and the scrubbing liquid from inside the at least one fine particle separator element 13.
  • This phenomenon causes fine metal particles to be separated from the top gas in the form of sludge or mud that settles to the bottom. of at least one second collection tank 14.
  • the at least one second collection tank 14 is coupled downstream of the at least one fine particle separator element 13. Furthermore, the at least one second collection tank 14 has a preferably prismatic and inclined bottom to allow the flow of the fine metal particle slurry and facilitate its collection.
  • the overhead gas is ejected from the at least one fine particle separator element 13 and falls into the at least one second collection tank 14. While the fine metal particle slurry settles at the bottom of the at least one second collection tank 14, the less dense overhead gas remains in the at least one second collection tank 14, with a phase separation occurring inside the at least one second collection tank 14 until this overhead gas is preferably forwarded to at least one demister dehumidifier 15 or for burning.
  • the system of the present invention further comprises at least one demister dehumidifier 15 connected downstream of the at least one second collection tank 14 for collecting overhead gas hovering at the top of the at least one second collection tank 14 and for dehumidifying the remaining overhead gas.
  • at least one demister dehumidifier 15 connected downstream of the at least one second collection tank 14 for collecting overhead gas hovering at the top of the at least one second collection tank 14 and for dehumidifying the remaining overhead gas.
  • each of the at least one dehumidifier 15 preferably comprises a metal mesh for intercepting liquid droplets in the gas and drying it. It is noted that it is possible that part of these liquid droplets comprise fine metal particles, which are captured by the metal mesh so that the dry top gas exits the at least one dehumidifier 15 and the liquid droplets comprising fine metal particles intercepted in the metal mesh fall into the at least one second collection tank 14.
  • the at least one second collection tank 14 comprises at least one sludge drain 17, responsible for draining the sludge of fine metallic particles out of the system. This drain is facilitated by the preferably prismatic and inclined shape of the at least one second collection tank 14.
  • collection may be done from an upper portion of at least a second collection tank 14, without using the sludge drain 17.
  • the at least one second collection tank 14 further comprises at least one water insertion channel 16 for inserting water into the at least one second collection tank 14 for cleaning and eventual maintenance of the at least one second collection tank 14.
  • the at least one gas transport channel 10 the at least one coarse particle separator element 11, the at least one fine particle separator element 13 and the at least one demister dehumidifier 15 are internally coated with a refractory material.
  • the fine metal particles are zinc particles.
  • the method of the present invention further comprises collecting the deposited coarse particles in at least one first collection tank 12 coupled downstream of the at least one coarse particle separator element 11, wherein the at least one coarse particle separator element 11 consists of a cyclone.
  • the coarse particles are separated from the overhead gas and fine metal particles by rotational and gravitational effects from within the at least one coarse particle separator element 11.
  • the coarse particles are deposited at the bottom of the at least one first collection tank 12, where they are collected.
  • collecting a slurry comprising the fine metal particles separated from the overhead gas in at least one second collection tank 14 comprises collecting the slurry through an upper opening of the at least one second collection tank 14.
  • the present invention also relates to a steel furnace 20 for manufacturing pig iron and separating fine metal particles, comprising: at least one upper tank 1; at least one lower tank 2; at least one fuel feeder positioned between the at least one upper tank 1 and the at least one lower tank 2; and at least one row of tuyeres 3, 4 positioned in at least one of the at least one upper tank 1 and the at least one lower tank 2, the at least one row of tuyeres 3, 4 fluidly communicating the interior of the furnace 20 with the external environment; and at least one burner positioned in at least one of the at least one tank upper 1 and at least one lower tank 2; and a system for separating fine metal particles from a top gas of the steelmaking furnace 20 of the present invention connected to a gas outlet of the steelmaking furnace 20; wherein the steelmaking furnace 20 is fed with a plurality of solid agglomerates comprising fine metal particles.
  • Figure 2 illustrates the steel furnace 20 for manufacturing pig iron and separating fine metal particles, the steel furnace 20 comprising at least one upper tank 1, at least one lower tank 2 and at least one row of tuyeres 3, 4.
  • the metallurgical furnace 20 of the present invention essentially consists of an upper tank 1 where the charge (raw material) is loaded into the furnace 20.
  • the upper tank 1 there is a set of at least one row of secondary tuyeres 4, which are preferably holes that allow the insufflation of hot or cold atmospheric air for burning CO and other combustible gases present in the ascending gas.
  • the insufflated air may, eventually, comprise O2 enrichment.
  • gaseous, liquid or solid fuel may be injected through the tuyeres 4 together with the insufflated air.
  • the furnace 20 of the present invention further comprises a lower tank 2, preferably circular or rectangular in cross-section, with a diameter or dimensions sufficient for feeding solid fuel.
  • the diameter or width of the cross-section of tank 2 is greater than that of tank 1, sufficient for positioning fuel feeders.
  • fuel supply ducts 5 can be coupled to ensure the fuel load to the furnace bed, avoiding load dragging when using fine materials. As the load descends into the feeder, preheating, pre-drying and distillation of the volatile fractions present in the solid fuels occur and combustible carbonaceous waste.
  • the lower tank 2 has one or more rows of primary tuyeres 3 which, like the secondary tuyeres described above, serve to blow hot or cold air, which may or may not be enriched with O2.
  • Solid powder, liquid or gaseous fuels may also be injected for partial combustion of the fuel, producing gas and providing the thermal energy necessary for the reduction and/or fusion of the load.
  • At least part of the primary or secondary tuyeres 3, 4 preferably comprise gas burners.
  • These burners positioned in the tuyeres 4 preferably comprise a coaxial tube, that is, a small central tube, through which the fuel is injected, and an outer tube surrounding it, through which passes the air blown by the tuyeres 3, 4 or any other oxidizer.
  • the steel furnace 20 of the present invention is preferably the steel furnace of patent BR102013033702-1, from the same holder, the contents of which are fully incorporated into the present description for ready reference.
  • FIG 3 illustrates the coupling of the separation system fine metal particles from an overhead gas of the present invention to the steelmaking furnace 20.
  • the at least one gas transport channel 10 connecting the furnace 20 to the at least one coarse particle separator element 11, the at least one coarse particle separator element 11 connected downstream to the at least one first collection tank 12, the at least one gas transport channel 10 further connecting the at least one coarse particle separator element 11 to the at least one fine particle separator element 13, and the at least one second collection tank 14 connected downstream to the at least one fine particle separator element 13.
  • the red arrows SI inside the at least one gas transport channel 10 indicate the direction of flow of gas that is expelled by the steel furnace 20. Furthermore, the red arrow S2 on the at least one coarse particle separator element 11 indicates the direction of flow of gas comprising fine particles and the arrow S3 indicates the direction of the coarse particles towards the at least one first collection tank 12. It is also possible to note the sludge drain 17 for collecting the sludge comprising fine metal particles from the at least one second collection tank 14. Finally, the clean gas, with no or little presence of fine metal particles, is eliminated from the at least one collection tank 14 for dehumidification. This clean gas is represented by the arrow S4.
  • the steel furnace is fed with a metal charge (raw material) and fuel.
  • the metal charge is the plurality of solid agglomerates comprising fine metal particles.
  • the plurality of solid agglomerates comprising fine metal particles consists of a plurality of solid agglomerates comprising electric steel mill powder. More preferably, the plurality of solid agglomerates comprising electric steel mill powder
  • the electric steel mill consists of a plurality of briquettes comprising electric steel mill dust.
  • the fine metallic particles are zinc particles.
  • the source of zinc in the solid agglomerate used by the present invention is not limited to electric steel mill dust; it is possible to use other sources of zinc, such as, for example, one or more of oxygen steel mill dust, willemite residues (zinc mine), steel by-products comprising zinc, or processed scrap comprising zinc. This characteristic provides the invention with the advantage of better treatment and reuse of these steel mill residues for the production of zinc.
  • the plurality of solid agglomerates comprising fine metal particles of the present invention consists of a plurality of solid agglomerates comprising one or more of oxygen steelmaking dust, willemite residues, steelmaking co-products comprising zinc, or processed scrap comprising zinc.
  • the steel furnace 20 is fed with a metal charge comprising self-reducing briquettes, in which the metal percentage is composed of any steel co-product that meets the minimum iron contents required for the production of pig iron according to this route.
  • this metal charge is reduced for the production of pig iron.
  • the steel furnace 20 has a top temperature between 600 °C and 700 °C. This temperature associated with the blow flow rate of the furnace 20 allows the zinc to be eliminated from the furnace 20 in its top gas before solidifying on the internal walls of the furnace 20. It is emphasized that the blow flow rate of the furnace of the present invention is driven by the presence of at least one row of tuyeres (3, 4) and of at least one burner.
  • the steelmaking furnace 20 for making iron The system and method for separating fine metal particles from the top gas of a steelmaking furnace 20 according to the present invention are attractive because they provide a means for the simultaneous production of pig iron and zinc, being an alternative to the traditional pyrometallurgical process, which is the Waelz furnace. It is also worth noting that the Waelz furnace has as its only product the most concentrated zinc.
  • the system, method and steelmaking furnace 20 proposed in the present invention have as their products pig iron and concentrated zinc.
  • the steelmaking furnace 20 used by the present invention can be fed with materials with a high concentration of zinc, such as electric steel mill dust, without the accumulation of condensed zinc on the internal walls of the furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La présente invention concerne un système de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique (20), comprenant : au moins un canal de transport de gaz (10) conçu pour transporter le gaz de sommet vers l'extérieur du four sidérurgique (20) ; au moins un élément séparateur de particules grossières (11) pour la séparation de particules grossières du gaz de sommet ; au moins un premier réservoir de collecte (12) accouplé en aval dudit au moins un élément séparateur de particules grossières (11) ; au moins un élément séparateur de particules fines (13) pour la séparation des particules métalliques fines du gaz de sommet ; et au moins un second réservoir de collecte (14) accouplé en aval dudit au moins un élément séparateur de particules fines (13), ledit au moins un réservoir de collecte (14) étant conçu pour recevoir une boue comprenant les particules métalliques fines séparées du gaz de sommet ; ledit au moins canal de transport de gaz (10) raccordant en aval du four sidérurgique (20) ledit au moins un élément séparateur de particules grossières (11) et ledit au moins un élément séparateur de particules fines (13). La présente invention concerne également un procédé de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique (20), ainsi qu'un four sidérurgique (20) pour la fabrication de fonte brute et la séparation de particules métalliques fines.
PCT/BR2024/050574 2023-12-27 2024-12-10 Système et procédé de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique, et four sidérurgique pour la fabrication de fonte brute et la séparation de particules métalliques fines Pending WO2025137750A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102023027583-4A BR102023027583B1 (pt) 2023-12-27 Sistema e método de separação de partículas metálicas finas de um gás de topo de um forno siderúrgico, e, forno siderúrgico para fabricação de ferro gusa e separação de partículas metálicas finas
BR1020230275834 2023-12-27

Publications (1)

Publication Number Publication Date
WO2025137750A1 true WO2025137750A1 (fr) 2025-07-03

Family

ID=96216252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2024/050574 Pending WO2025137750A1 (fr) 2023-12-27 2024-12-10 Système et procédé de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique, et four sidérurgique pour la fabrication de fonte brute et la séparation de particules métalliques fines

Country Status (1)

Country Link
WO (1) WO2025137750A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007875A1 (fr) * 2008-07-14 2010-01-21 株式会社神戸製鋼所 Installation de traitement de gaz d'échappement et procédé de collecte de poussières par l'installation de traitement de gaz d'échappement
US20100123275A1 (en) * 2008-11-18 2010-05-20 Hunter William C Off-gas heat recovery and particulate collection
WO2014125057A1 (fr) * 2013-02-15 2014-08-21 Paul Wurth S.A. Procédé pour charger un lit de fusion à haute teneur en zinc dans une installation de haut fourneau
WO2015095946A1 (fr) * 2013-12-27 2015-07-02 Tecnored Desenvolvimento Tecnologico S.A. Four métallurgique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010007875A1 (fr) * 2008-07-14 2010-01-21 株式会社神戸製鋼所 Installation de traitement de gaz d'échappement et procédé de collecte de poussières par l'installation de traitement de gaz d'échappement
US20100123275A1 (en) * 2008-11-18 2010-05-20 Hunter William C Off-gas heat recovery and particulate collection
WO2014125057A1 (fr) * 2013-02-15 2014-08-21 Paul Wurth S.A. Procédé pour charger un lit de fusion à haute teneur en zinc dans une installation de haut fourneau
WO2015095946A1 (fr) * 2013-12-27 2015-07-02 Tecnored Desenvolvimento Tecnologico S.A. Four métallurgique

Similar Documents

Publication Publication Date Title
FI82612C (fi) Foerfarande och anordning foer behandling av processgaser.
CN103114212B (zh) 锑的冶炼装置和冶炼方法
EP0649509A1 (fr) Procede de fabrication amelioree de ciment dans des fours longs
CN104105672B (zh) 一种用于在制造矿物熔体时回收材料的方法
CN101899580B (zh) 锌精矿冶炼设备
US4551313A (en) Flash sublimation and purification of molybdenum oxide
FI85506C (fi) Autogen smaeltugn.
CN106086477B (zh) 锑精矿的冶炼系统
NO135480B (fr)
WO2025137750A1 (fr) Système et procédé de séparation de particules métalliques fines d'un gaz de sommet d'un four sidérurgique, et four sidérurgique pour la fabrication de fonte brute et la séparation de particules métalliques fines
RU2420452C1 (ru) Способ получения термической фосфорной кислоты и устройство для его реализации
BR102023027583B1 (pt) Sistema e método de separação de partículas metálicas finas de um gás de topo de um forno siderúrgico, e, forno siderúrgico para fabricação de ferro gusa e separação de partículas metálicas finas
KR20030031004A (ko) 로의 연도내 먼지 처리방법
CN101914690B (zh) 锌精矿冶炼工艺
US6517603B2 (en) Method for recovery of metals having low vaporization temperature
CN105603177B (zh) 一种劣质煤提钒富氧焙烧的方法及装置
US4073645A (en) Process of smelting sulphidic copper ore concentrates
WO2015095946A1 (fr) Four métallurgique
KR930012179B1 (ko) 자용제련로의 조업시 발생하는 분진을 감소시키고 산소효율을 증대시키는 방법
US2784076A (en) Ore treating processes
CN222352861U (zh) 悬浮熔炼炉
JPH06212298A (ja) 銅製錬における微細原料の処理方法
CN222352860U (zh) 熔炉设备
US1985902A (en) Concentrate burner
US2086232A (en) Production of sulphur dioxide

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24909250

Country of ref document: EP

Kind code of ref document: A1