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WO2022153231A1 - Traitement de scories - Google Patents

Traitement de scories Download PDF

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Publication number
WO2022153231A1
WO2022153231A1 PCT/IB2022/050294 IB2022050294W WO2022153231A1 WO 2022153231 A1 WO2022153231 A1 WO 2022153231A1 IB 2022050294 W IB2022050294 W IB 2022050294W WO 2022153231 A1 WO2022153231 A1 WO 2022153231A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
fraction
sub
less
crusher
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.)
Ceased
Application number
PCT/IB2022/050294
Other languages
English (en)
Inventor
Tom WALANDER
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.)
Addforce Services Ltd
Original Assignee
Addforce Services Ltd
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 Addforce Services Ltd filed Critical Addforce Services Ltd
Priority to EP22704425.2A priority Critical patent/EP4277752A1/fr
Publication of WO2022153231A1 publication Critical patent/WO2022153231A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/005—Crushing or disintegrating by reciprocating members hydraulically or pneumatically operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/14—Stamping mills
    • 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
    • C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
    • 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
    • C22B7/04—Working-up slag

Definitions

  • the present invention relates to the slag processing, in particular for recovering iron from this byproduct.
  • An object of the present invention is to provide a complete recovering of iron from slag.
  • Another object is to effectively break slag, in particular slag of relatively important size, typically above 300 mm.
  • Another object is to separate and recover FeO from slag.
  • Grizzly feeder adapted to separate a slag fraction of less than 60 mm
  • a single rotor crusher adapted to crush a slag sub-fraction of 30 to 60 mm
  • a centrifugal crusher adapted to crush a slag sub-fraction of less than 30 mm
  • a drum magnet and a material spreader that are adapted for sorting said sub-fraction of less than 30 mm.
  • the inventors have surprisingly found that an efficient and complete iron recovery can be obtained when handling the above cited slag fractions.
  • the “less than 30 mm” fraction is particularity useful for separating FeO.
  • the invention also relates to a process for slag processing comprising the following steps:
  • FIG 1 represents one system according to the invention.
  • FIG. 2 illustrates an active free lime process
  • Figure 3 is a transparent view of a hydraulic breaker according to the invention.
  • Figure 4 shows different positions of a hydraulic breaker according to the invention
  • Figure 5 illustrates the combination of a machine and a hydraulic breaker
  • Slag is fed to the hopper by front loader, excavator or dumper.
  • fraction 0-60 (100) mm is separated from the flow to conveyor line to Special crusher (4) passing the Jaw Crusher (3).
  • Fraction 60-800 mm goes into a drum screen (2).
  • Drum screen diameter 2,2 m, is made of highly wear-resistant steel. Slag is divided into 60- 300 mm and over 300 mm fractions. (Opening of the screen can be on range 200 - 300 mm). Drum is supported with four rubber wheels. There are 2 x 22 kW electric gear motor drives.
  • the drum speed is variable.
  • Robust Jaw Crusher (3) are designed for high performance, in order to achieve the lowest possible operating cost per ton of end product produced. Performance has been optimized through solid cavity design and kinematics.
  • the robust Jaw Crusher feature a long stroke, optimized operating speed, and an aggressive motion of the pitman.
  • the crusher is fed by 60-300mm slag (no thicker metal pieces than 340mm). Materials are crushed in smaller fractions. Automatic metal piece control (AMPC) let unbroken pieces going thru without causing damage to Crusher. Materials continue with conveyor (6) to the inclined heavy-duty screen (5).
  • AMPC Automatic metal piece control
  • the screen is a horizontal with double decks.
  • the top screen is very durable wire deck.
  • 0-300 mm slag will be screened to 0 - 30 mm, 30 - 60 mm and 60 - 300 mm fractions.
  • Magnet is for fraction 60 - 300 mm.
  • Magnet is belt drum magnet (7) where diameter of the drum is specified for this fraction. Inside of the drum is permanent magnet which position is fully adjustable.
  • Divider plate will guide steel scrap and slag to right conveyors. Position of the divider plate is fully adjustable.
  • Magnetic metal pieces will go to conveyor and to cleaning drum (8). Slag will go to conveyor and to the Jaw crusher. Magnet PM630(8)
  • Magnet is belt drum magnet where diameter of the drum is specified for this fraction. Inside of the drum is permanent magnet which position is fully adjustable.
  • Divider plate will guide steel scrap and slag to right conveyors. Position of the divider plate is fully adjustable.
  • Magnetic metal pieces will go to conveyor and to cleaning drum (8). Slag > 30 mm will go to the Special crusher (4) and back to the screen (5).
  • Magnetic metal pieces in fractions 30 - 60 and 60 - 300 are cleaned from slag residues in cleaning drum (8).
  • Magnetic metal pieces is fed to drum with conveyor. Diameter of the drum is 3.0 m. There are lifters, which lift metal pieces up. This rotation causes autogenous cleaning where falling of metal pieces will liberate slag residues. When metal pieces drop on steel bed on bottom there is very small amount of wearing.
  • Cleaning Drum is supported with four rubber wheels.
  • the LF slag-processing utilizes a smaller equipment footprint since the slag is already in a small size and can be fed, screened, and run through a specialized centrifugal mill for crushing and metallic separation. To maximize the utilization of equipment capacity and reduce the footprint of the plant.
  • the High-Speed Centrifugal crusher (11) is for crushing the steel slag in fraction 0-30 mm. This mill liberates rest of metallic pieces from lime and silicate. Crushed material goes by conveyor to the fine magnet (9).
  • the input material is fed from above into the center of the centrifugal mill. Material is thrown from the inner rotor to the opposite direction rotating outer rotor by high-speed centrifugal force.
  • the twin rotor eliminates the risk of clogging and allow high throughput rates.
  • Magnet High Speed drum magnet with High Intensity magnet field, where diameter of the drum is specified for this fraction. Inside of the drum is permanent, high intensity magnet, which position is fully adjustable.
  • Material spreaders expand the slag for the whole width of the magnet, in this way the magnet separation is more efficient, and flow can be higher. Material spreader is designed for the harsh environment against material sticking.
  • Divider plate will guide magnetic pieces and slag to right conveyors. Position of the divider plate is fully adjustable.
  • Metals 0 - 30 mm will go by conveyor to Flip flop screen (10) and to storage silos. Slag 0 - 5 mm will go by conveyor to storage silo.
  • Screen is a horizontal flip flop screen with one deck.
  • the screen is very durable 60 mm rubber screen.
  • Deck has surface area app 15 m2.
  • 0-30 mm slag metals will be screened to 0-2 mm and 2 - 30 mm fractions. 2 - 30 mm fraction goes over the deck (over size) to conveyor and silo.
  • This machine is used for effectively braking slag of relatively important size, i.e. above 300 mm.
  • Carrier machine Stationary carrier machine with legs or mobile version with tracks. Power is produced by electric current or by diesel engine.
  • Chassis This consists mainly of the main pipe in which the hammerhead and coupler operates.
  • Power train This consists mainly of adouble luff, which operates on 2 slide bars. A hydraulic double acting main cylinder, which expands and lifts the hammerhead and couplerto the top of the chassis.
  • Hammer head The hammer head runs inside the chassis and consists of several parts. One replaceable hammer point and one ballast block.
  • Coupler The Power train activates a wire, which lifts the coupler.
  • the coupler has electromagnet catcher. The magnet field activates when the coupler reaches the hammerhead and catcher attaches itself to the lifting tap.
  • the coupler has a mechanical locking to prevent the head from falling in the event of a power failure.
  • Carrier machine coupler The hydraulic coupler is the attachment to the carrier machine.
  • figure 4 which shows a basic work cycle.
  • the breaker has a hydraulic drop hammer.
  • the principle of operation is as follows:
  • the coupler releases as it reaches the highest limitation of the chassis.
  • the invention also concerns the production and stabilization of active free lime from slag tailings n fraction 0-5 mm.
  • the resulting product comes from the slag processing process. It is a unique ecological product which binds carbon dioxide from the air, because of the multiplied surface area.
  • the product can be recycled and 100% reused in replacing cement in concrete production. 1.
  • slag tailings are grinded in to fraction below 50 microns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un système de traitement de scories comprenant un alimentateur à grille (1) conçu pour séparer une fraction de scories inférieure à 60 mm, un broyeur spécial (4) conçu pour broyer une sous-fraction de scories de 30 à 60 mm, un broyeur centrifuge (11) conçu pour broyer une sous-fraction de scories inférieure à 30 mm, ainsi qu'un séparateur magnétique à tambour (9) et un épandeur de matériaux qui sont conçus pour trier ladite sous-fraction inférieure à 30 mm. L'invention concerne également un procédé de traitement de scories comprenant les étapes suivantes : - la séparation d'une fraction de scories inférieure à 60 mm, - le broyage d'une sous-fraction de scories de 30 à 60 mm, - le broyage d'une sous-fraction de scories inférieure à 30 mm, - le tri de ladite sous-fraction inférieure à 30 mm par épandage des scories et application d'une force magnétique sur ces dernières.
PCT/IB2022/050294 2021-01-15 2022-01-14 Traitement de scories Ceased WO2022153231A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22704425.2A EP4277752A1 (fr) 2021-01-15 2022-01-14 Traitement de scories

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IBPCT/IB2021/050291 2021-01-15
IB2021050291 2021-01-15

Publications (1)

Publication Number Publication Date
WO2022153231A1 true WO2022153231A1 (fr) 2022-07-21

Family

ID=80595559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2022/050294 Ceased WO2022153231A1 (fr) 2021-01-15 2022-01-14 Traitement de scories

Country Status (2)

Country Link
EP (1) EP4277752A1 (fr)
WO (1) WO2022153231A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1478826A (en) 1922-04-13 1923-12-25 Ellsworth A Hawthorne Automobile mirrorscope bracket
US4747547A (en) 1986-06-11 1988-05-31 Nippon Jiryoku Senko Co., Ltd. Process for the treatment of slag generated in an ironworks
WO2002066164A1 (fr) * 2001-02-19 2002-08-29 Georg Schons Installation et procede de traitement de minerais metalliferes
KR20020074430A (ko) * 2002-08-02 2002-09-30 태원건설주식회사 제강 슬래그를 이용한 골재 제조방법 및 장치
WO2009089906A1 (fr) * 2008-01-15 2009-07-23 Recoval Belgium Procédé de production de mortier ou de béton
EP2128279A1 (fr) * 2008-05-30 2009-12-02 Recco B.V. Procédé de séparation de fractions contenant du métal de laitier sec et utilisation de ce procédé pour du laitier d'incinération de déchets
US20130240415A1 (en) 2012-03-19 2013-09-19 Mid-American Gunite, Inc. Method and system for processing slag material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1478826A (en) 1922-04-13 1923-12-25 Ellsworth A Hawthorne Automobile mirrorscope bracket
US4747547A (en) 1986-06-11 1988-05-31 Nippon Jiryoku Senko Co., Ltd. Process for the treatment of slag generated in an ironworks
WO2002066164A1 (fr) * 2001-02-19 2002-08-29 Georg Schons Installation et procede de traitement de minerais metalliferes
KR20020074430A (ko) * 2002-08-02 2002-09-30 태원건설주식회사 제강 슬래그를 이용한 골재 제조방법 및 장치
WO2009089906A1 (fr) * 2008-01-15 2009-07-23 Recoval Belgium Procédé de production de mortier ou de béton
EP2128279A1 (fr) * 2008-05-30 2009-12-02 Recco B.V. Procédé de séparation de fractions contenant du métal de laitier sec et utilisation de ce procédé pour du laitier d'incinération de déchets
US20130240415A1 (en) 2012-03-19 2013-09-19 Mid-American Gunite, Inc. Method and system for processing slag material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUITING SHEN ET AL: "An overview of recovery of metals from slags", WASTE MANAGEMENT, vol. 23, no. 10, 1 January 2003 (2003-01-01), pages 933 - 949, XP055123338, ISSN: 0956-053X, DOI: 10.1016/S0956-053X(02)00164-2 *

Also Published As

Publication number Publication date
EP4277752A1 (fr) 2023-11-22

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