WO2019175798A1 - Agglomération de fines - Google Patents

Agglomération de fines Download PDF

Info

Publication number
WO2019175798A1
WO2019175798A1 PCT/IB2019/052038 IB2019052038W WO2019175798A1 WO 2019175798 A1 WO2019175798 A1 WO 2019175798A1 IB 2019052038 W IB2019052038 W IB 2019052038W WO 2019175798 A1 WO2019175798 A1 WO 2019175798A1
Authority
WO
WIPO (PCT)
Prior art keywords
reactor vessel
gas
sintering
base
interior
Prior art date
Application number
PCT/IB2019/052038
Other languages
English (en)
Inventor
Arthur CHEREM
Sinclair BONNEMASOU
Original Assignee
Traxys Brix Pty 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 Traxys Brix Pty Ltd filed Critical Traxys Brix Pty Ltd
Priority to AU2019235644A priority Critical patent/AU2019235644A1/en
Publication of WO2019175798A1 publication Critical patent/WO2019175798A1/fr

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
    • C22B1/16—Sintering; Agglomerating
    • C22B1/18—Sintering; Agglomerating in sinter pots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/0285—Heating or cooling the reactor
    • 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
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/04—Sintering pots or sintering pans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00504—Controlling the temperature by means of a burner
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00796—Details of the reactor or of the particulate material
    • B01J2208/00884—Means for supporting the bed of particles, e.g. grids, bars, perforated plates

Definitions

  • the invention relates to fines agglomeration. More specifically the invention relates to mineral fines agglomeration, particularly by means of sintering.
  • the invention provides a mineral fines sintering reactor vessel for mineral fines agglomeration by means of sintering.
  • the invention extends to a mineral fines sintering reactor vessel installation comprising the mineral fines sintering reactor vessel.
  • the invention also provides use of the mineral fines sintering reactor vessel and/or the mineral fines sintering reactor vessel installation in mineral fines agglomeration by means of sintering.
  • the invention further provides a method of mineral fines agglomeration by means of sintering.
  • raw materials are required to be of a certain, sufficiently large (“lumpy”), particle size for conversion in metallurgical furnaces as electric arc furnaces, submerged arc furnaces, blast furnaces and the like. Ore fines, typically of a particle size below 6mm, are undesirable for conversion in metallurgical furnaces.
  • sintering involves heating a particulate solid material, without liquefaction (i.e. to a level below its melting point) such that it coalesces into an agglomerated mass.
  • this may include igniting a solid fuel in proximity to or in contact with at least part of the particulate solid material, to provide the heat necessary for sintering to take place.
  • a hollow body with an open top comprising a continuous side wall and a base which define a hollow interior of the body;
  • the mineral fines may generally speaking be any mineral fines, but it may in particular for the purpose of the invention be manganese- or chrome- or iron-based mineral fines. It may also, alternatively, be vanadium-, titanium-, cassiterite-, nickel-, silicon-, or zinc-based fines. In particular, the fines may be mined ore fines, e.g. of the abovementioned minerals.
  • the gas that would, in use, typically be introduced into the hollow interior of the body would typically be air, optionally being enriched with oxygen or reducing gas, and thus the gas inlet may be an air inlet.
  • the body may include handling formations, for displacement of the reactor vessel.
  • the handling formations may be configured to allow displacement of the reactor vessel by way of tilting, effectively to pour contents contained in its interior in use out of its interior.
  • the handling formations may include at least one pair of oppositely located lugs located adjacent the open top of the reactor vessel.
  • the body may have a circular cross section, in which case the lugs may be located diametrically opposite each other.
  • the side wall and, typically, the base may comprise a refractory material, e.g. as a lining material.
  • the open top of the body may have a width dimension in a range of from about 1 2m to about 3m. In the embodiment in which the body has a circular cross section, the width dimension would be a diameter.
  • the body may have a height dimension, typically measured from its open top to the bottom of its base outside the interior of the body, in a range of from about 1 .5m to about 3m.
  • the interior of the body may have a volume in a range of from about 8m 3 to about 18m 3 .
  • the vessel When the vessel includes a gas inlet adjacent to the base, such a gas inlet would typically be provided in the side wall, located closely to the base.
  • such a gas inlet may be located in the side wall within the first 50% of that part of the height dimension above the base inside the interior of the vessel (i.e. the depth of the interior of the vessel), or within the first 45%, or within the first 40%, or within the first 35%, or within the first 30%, or within the first 25%, or within the first 20%, or within the first 15%, or within the first 10%, or within the first 5%.
  • such a gas inlet may be located in the side wall within the first 1.25m, or within the first 1 125m, or within the first 1 m, or within the first 0.875m, or within the first 0.75m, or within the first 0.625m, or within the first 0.5m, or within the first 0.375m, or within the first 0.25m, or within the first 0.125m of that part of the height dimension.
  • the vessel has gas inlets both in and adjacent to the base, with the gas inlet adjacent to the base, as noted above, typically being provided in the side wall, located closely to the base.
  • the gas inlet, or gas inlets when there are inlets both in and adjacent to the base may comprise openings in and/or adjacent to the base. The openings may be defined by suitable formations of the base and/or the side wall.
  • the definition of the invention provides for the gas inlet being provided in the base, or adjacent to the base, in which case it would typically be in the side wall, or for separate gas inlets to be provided both in and adjacent to the base. That the vessel may include further gas inlets is, of course, not excluded.
  • a mineral fines sintering reactor vessel as hereinbefore described; and a gas supply in fluid communication with the gas inlet in the side wall and/or in the base of the body of the reactor vessel.
  • the mineral fines may generally speaking be any mineral fines, but it may in particular for the purpose of the invention be manganese- or chrome- or iron-based mineral fines. It may also, alternatively, be vanadium-, titanium-, cassiterite-, nickel-, silicon-, or zinc-based fines. In particular, the fines may be mined ore fines, e.g. of the abovementioned minerals.
  • the gas would typically be air.
  • the gas supply would typically be an air supply.
  • the gas supply may include a gas supply pipe that extends between the gas inlet in and/or adjacent to the base and a gas source.
  • the gas source may typically be a gas, e.g. air, blower or compressor, which in use delivers gas to the interior of the body of the reactor vessel through the gas inlet/s in and/or adjacent to the base thereof, through the gas supply pipe.
  • the installation may include a handling device for handling the reactor vessel, typically to pour its contents from it in use e.g. a hydraulic lifting device, a hydraulic or other tilting platform, a hoist, a crane, or the like.
  • a handling device for handling the reactor vessel typically to pour its contents from it in use e.g. a hydraulic lifting device, a hydraulic or other tilting platform, a hoist, a crane, or the like.
  • the mineral fines may generally speaking be any mineral fines, but it may in particular for the purpose of the invention be manganese- or chrome-based mineral fines. It may also, alternatively, vanadium-, titanium-, cassiterite-, nickel-, silicon-, or zinc-based fines. In particular, the fines may be mined ore fines, e.g. of the abovementioned minerals.
  • the use of the mineral fines sintering reactor vessel and/or of the mineral fines sintering installation in this regard may be in accordance with the method of the invention hereinafter described.
  • a method of mineral fines agglomeration by means of sintering including subjecting a body of solid particulate material comprising mineral fines and solid fuel to sintering in a mineral fines sintering reactor vessel as hereinbefore described, wherein the sintering includes feeding a gas into the interior of the reactor vessel through the gas inlet in and/or adjacent to the base of the reactor vessel.
  • the mineral fines may generally speaking be any mineral fines, but it may in particular for the purpose of the invention be manganese- or chrome- or iron-based fines. It may also, alternatively, vanadium-, titanium-, cassiterite-, nickel-, silicon-, or zinc-based fines. In particular, the fines may be mined ore fines, e.g. of the abovementioned minerals.
  • Feeding the gas into the interior of the vessel may be effected such that gas rises through the body of solid particulate material.
  • the gas would typically be air.
  • the reactor vessel would preferably form part of a mineral fines sintering reactor vessel installation as hereinbefore described.
  • the gas would be supplied to the gas inlet in and/or adjacent to the base along the gas supply pipe and would be generated by one or more gas sources, e.g. blowers or compressors that form part of the installation.
  • the method may include a prior step of constituting the body of solid particulate material.
  • Constituting the body of solid particulate material may include mixing, with the mineral fines as a major component of the body of solid particulate material, and one or more of reductants, the solid fuel, by-products of industrial operations, and chemicals.
  • Reductants and the solid fuel, may include carbon bearing materials such as coke, coal, charcoal, anthracite, and the like.
  • By-products of industrial operations may include dust, and sludge from de-dusting operations.
  • Chemicals may include water, and binders such as bentonite and cement.
  • the method may include another prior step of charging the interior of the reactor vessel with the body of solid particulate material.
  • the method may include a further prior step of igniting the solid fuel.
  • the solid fuel that is ignited may be solid fuel comprise in the body of solid particulate material inside the interior of the reactor vessel, and/or it may be solid fuel that is charged into the interior of the reactor vessel before charging the reactor vessel with the body of solid particulate material e.g. by igniting the fuel and then charging it into the interior of the reactor vessel or charging the fuel into the reactor vessel and then igniting it, and thereafter charging the reactor vessel with the body of solid particulate material.
  • FIGURE 1 shows diagrammatically, in top view, a mineral fines sintering reactor vessel in accordance with the invention
  • FIGURE 2 shows diagrammatically, in sectional side view, the mineral fines sintering reactor vessel of Figure 1 , along A-A’;
  • FIGURE 3 shows diagrammatically a mineral fines sintering reactor vessel installation according to the invention.
  • reference numeral 10 generally indicates an exemplary embodiment of a mineral fines sintering reactor vessel in accordance with the invention.
  • the vessel 10 may be a vessel generally known in the art of the invention as a“ladle”, which is generally an embodiment that the invention as hereinbefore described includes in respect of the vessel of the invention, the ladle being adapted at least in respect of the gas inlet/s as described, and in respect of its usefulness in the application as described.
  • the reactor vessel 10 comprises a body 11 of circular cross section.
  • the body 11 comprises, more specifically, a continuous side wall 12 and a base 14, thus defining a hollow interior 16.
  • a top 18 of the reactor vessel 10 is open.
  • the body 11 has a diameter in a range of from about 2m to about 3m.
  • the body 11 has a height dimension, typically measured from its open top 18 to the bottom of its base 14 outside the interior 16, in a range of from about 1.5m to about 3m.
  • the interior 16 of the body 11 has a volume in a range of from about 8m 3 to about 18m 3 .
  • Interiors 12A, 14A of the side wall 12 and the base 14 comprise a refractory lining.
  • the side wall 12 and the base 14 are each either of steel plates or of cast iron.
  • the body 11 also includes displacement formations in the form of two diametrically oppositely located lugs 20.
  • Respective gas inlets 22A, 22B are defined respectively in the side wall 12, adjacent to the base 14, and in the base 14.
  • the inlets 22A, 22B are in the form of through apertures that allow for gas to be fed into the interior 16 of the reactor vessel 10.
  • the inlet 22A may be located in the side wall 12 within the first 50% of that part of the height dimension above the base inside the interior of the vessel (i.e. the depth of the interior of the vessel), or within the first 45%, or within the first 40%, or within the first 35%, or within the first 30%, or within the first 25%, or within the first 20%, or within the first 15%, or within the first 10%, or within the first 5%.
  • such a gas inlet may be located in the side wall within the first 1 25m, or within the first 1 .125m, or within the first 1 m, or within the first 0.875m, or within the first 0.75m, or within the first 0.625m, or within the first 0.5m, or within the first 0.375m, or within the first 0.25m, or within the first 0.125m of that part of the height dimension.
  • the reactor vessel 10 further includes a grid 25 (not shown in Figure 1 ) that is spaced from the interior 14A of the base 14.
  • the grid supports material that would be sintered and spaces it from some or all solid fuel that is used to ignite the material.
  • reference numeral 100 generally indicates an exemplary embodiment of a mineral fines sintering reactor vessel installation in accordance with the invention.
  • the installation 100 includes the reactor vessel 10 of Figures 1 and 2.
  • supply pipes 102 lead to the gas inlets 22A, 22B of the reactor vessel 10.
  • a first pipe section 102A is a main air supply pipe, and a second pipe section 102B is an alternative air supply pipe.
  • a third pipe section 102C connects the first and second pipe sections 102A, 102B to an air blower 104, which supplies air to the supply pipes 102 in use, and therefore also to the interior of the reactor vessel 10 through the gas inlets 22A, 22B.
  • the reactor vessel 10 is used to subject a body of particulate solid material, comprising at least a major proportion of solid mineral fines, to sintering.
  • the fines may typically have a particle size of less than 10mm.
  • the body of particulate solid material may include solid fuel, and other additives in accordance with the invention.
  • solid fuel is ignited and is then charged into the interior 16 of the reactor vessel 10, separately of the body of particulate solid material.
  • the body of particulate solid material including additional solid fuel comprised therein, is charged into the interior 16 of the reactor vessel 10.
  • the introduction of air into the interior 16 of the reactor vessel 10 is maintained throughout, and after the body of particulate solid material has been charged into the reactor vessel
  • Charging of the interior 16 of the reactor vessel 10 with the solid fuel and with the body of solid particulate material and constitution of the body of solid particulate material may be effected through conventional techniques/equipment such as mixers, homogenizers, pelletizing, discs, re-rolling drums, scales, conveyors, silos, feeders, and the like.
  • the continued air flow sustains burn of the solid fuel that is comprised in the body of particulate solid material.
  • sintering of the fines in the body of particulate solid material occurs in a direction from the base 14 of the reactor vessel 10 to its top 18.
  • the rate of air flow and the amount of fuel initially introduced into the interior 16 of the reactor vessel 10 and comprised by the body of solid particulate material are selected so that sintering is achieved, i.e. agglomeration through heating, without liquefaction.
  • the air flow is ceased and the contents of the reactor vessel 10, which have now been converted to a sinter product, are discharged, e.g. onto a truck or a metallic container.
  • Such discharge may e.g. be achieved by tilting the reactor vessel 10, e.g. by way of a gear motor, hoisting, hydraulic lifting, or the like.
  • this invention When compared with traditional sintering processes, this invention provides:

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Metallurgy (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne une cuve de réacteur de frittage de fines minérales à base de manganèse et/ou de chrome et/ou de fer pour l'agglomération de fines minérales à base de manganèse ou de chrome et/ou de fer par frittage. La cuve de réacteur comprend un corps creux ayant une partie supérieure ouverte, le corps comprenant une paroi latérale continue et une base qui définissent un intérieur creux du corps. Le réacteur comprend également une entrée de gaz dans et/ou adjacente à la base, à travers laquelle du gaz peut être introduit dans l'intérieur creux du corps.
PCT/IB2019/052038 2018-03-14 2019-03-13 Agglomération de fines WO2019175798A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2019235644A AU2019235644A1 (en) 2018-03-14 2019-03-13 Fines agglomeration

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2018/01735A ZA201801735B (en) 2018-03-14 2018-03-14 Sinter wessel technology
ZA2018/01735 2018-03-14

Publications (1)

Publication Number Publication Date
WO2019175798A1 true WO2019175798A1 (fr) 2019-09-19

Family

ID=67137039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/052038 WO2019175798A1 (fr) 2018-03-14 2019-03-13 Agglomération de fines

Country Status (3)

Country Link
AU (1) AU2019235644A1 (fr)
WO (1) WO2019175798A1 (fr)
ZA (1) ZA201801735B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826487A (en) * 1955-07-07 1958-03-11 United States Steel Corp Method of sintering ore fines
US2918267A (en) * 1953-03-18 1959-12-22 Bethlehem Steel Corp Pelletizing furnace
US3957484A (en) * 1973-10-09 1976-05-18 Simon Otto Fekete Fluid bed roasting of metal sulphides at high temperatures
US4693682A (en) * 1986-05-12 1987-09-15 Institute Of Gas Technology Treatment of solids in fluidized bed burner
WO1999016541A1 (fr) * 1997-09-30 1999-04-08 Mortimer Technology Holdings Ltd. Procede et appareil de traitement de matieres particulaires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2918267A (en) * 1953-03-18 1959-12-22 Bethlehem Steel Corp Pelletizing furnace
US2826487A (en) * 1955-07-07 1958-03-11 United States Steel Corp Method of sintering ore fines
US3957484A (en) * 1973-10-09 1976-05-18 Simon Otto Fekete Fluid bed roasting of metal sulphides at high temperatures
US4693682A (en) * 1986-05-12 1987-09-15 Institute Of Gas Technology Treatment of solids in fluidized bed burner
WO1999016541A1 (fr) * 1997-09-30 1999-04-08 Mortimer Technology Holdings Ltd. Procede et appareil de traitement de matieres particulaires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"PROCEEDINGS OF THE SEMINAR ON EXPERIMENTAL APPROACHES IN PYROMETALLURGICAL RESEARCH", 20 April 2000, ALLIED PUBLISHERS PVT. LTD, New Delhi, article DATTA P. ET AL.: "Measurement of Green-bed Permeability and Its Influence on Iron-ore Sinter Productivity", pages: 48 - 51 *

Also Published As

Publication number Publication date
AU2019235644A1 (en) 2020-08-20
ZA201801735B (en) 2019-01-30

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