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WO2012007385A1 - Procédé de production de produits pressés contenant des particules de carbone - Google Patents

Procédé de production de produits pressés contenant des particules de carbone Download PDF

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Publication number
WO2012007385A1
WO2012007385A1 PCT/EP2011/061619 EP2011061619W WO2012007385A1 WO 2012007385 A1 WO2012007385 A1 WO 2012007385A1 EP 2011061619 W EP2011061619 W EP 2011061619W WO 2012007385 A1 WO2012007385 A1 WO 2012007385A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
weight
substance
carbon particles
compacts
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/EP2011/061619
Other languages
German (de)
English (en)
Inventor
Hado Heckmann
Josef Stockinger
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.)
SIEMENS VAI METALS TECHNOLOGIES GmbH
Primetals Technologies Austria GmbH
Original Assignee
SIEMENS VAI METALS TECHNOLOGIES GmbH
Siemens VAI Metals Technologies GmbH Austria
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 SIEMENS VAI METALS TECHNOLOGIES GmbH, Siemens VAI Metals Technologies GmbH Austria filed Critical SIEMENS VAI METALS TECHNOLOGIES GmbH
Priority to US13/809,968 priority Critical patent/US20130174695A1/en
Priority to EP11738661.5A priority patent/EP2593536B1/fr
Priority to CN201180033650.0A priority patent/CN102959058B/zh
Priority to KR1020137003563A priority patent/KR20130096705A/ko
Publication of WO2012007385A1 publication Critical patent/WO2012007385A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/105—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with a mixture of organic and inorganic binders
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
    • C10L5/146—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders with wax, e.g. paraffin wax
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
    • C10L5/16—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders with bituminous binders, e.g. tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/22—Methods of applying the binder to the other compounding ingredients; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C10L5/36—Shape
    • C10L5/361—Briquettes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C21B13/002—Reduction of iron ores by passing through a heated column of carbon
    • 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
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates

Definitions

  • the invention relates to a process for the production of pellets containing pellets, the pellets obtained thereby and the use of the pellets in processes for producing pig iron in a fixed bed or in processes for the preparation of carbon carriers for processes for producing pig iron in a fixed bed.
  • Compressive strength is required to maintain the original size of the compacts after being charged into a material bunker or fixed bed reactor, despite pressure exerted by superposed layers of material.
  • hot strength refers to a) strength remaining after pyrolysis of the pellets in a high temperature zone
  • Coke particles existing size of these particles is largely retained.
  • coals which show an extraordinarily high water absorption capacity, in particular characterized by a high inherent moisture content.
  • the moisture content of the compacts should not be too high, ie at a maximum of 7% by weight. This is because this moisture in the use of the pellets for pig iron production or for the production of carbon carriers for
  • Drying produced additional pore volume.
  • the unwetted pore volume can absorb a corresponding amount of water or aqueous media.
  • the additional pore volume can again absorb water or aqueous medium.
  • certain coals also tend to have extra pore volume due to grain damage, especially during intense drying to generate.
  • molasses contains components which act catalytically with respect to a reaction of carbon with hot, C0 2 -containing gases, whereby in particular in the hot zones of a production of pig iron serving fixed bed at temperatures> 800-1000 ° C, depending on the pressure, the extent a conversion of solid carbon with C0 2 increases according to Boudouard reaction.
  • the hot strength of molasses-treated compacts is relieved by pyrolysis-derived, semi-coke or coke particles.
  • bitumen as a binder proposed in WO9901583A1 does not pose such problems associated with molasses. However, the production of pellets with bitumen is associated with very high binder costs.
  • the object of the present invention is to provide a process for the production of compacts, in which these disadvantages of the prior art are overcome, and compacts with sufficient green and hot strength even with the use of carbon particles, which must be pre-dried, using a known Lesser amount of a water-containing binder system can be produced.
  • This object is achieved by a method for producing a compact containing carbon particles, in which the carbon particles are mixed with a water-containing binder system and the resulting mixture is further processed by pressing into compacts,
  • At least a subset of the carbon particles is subjected to at least two impregnation steps in which it is impregnated with at least one substance.
  • the substance either penetrates into the pores of the carbon particles and accordingly prevents the penetration of components of the aqueous binder system by filling in the pore space. Or the substance settles in the Exit points of the pores on the carbon particle surface, also called pore necks, and prevents by this clogging of the pore necks penetration of components of the aqueous binder system in the pores.
  • aqueous binder system which is needed on the coal particle surface for binding purposes, can no longer fulfill these binding purposes after penetration into the pores. Accordingly, as compared with a method in which aqueous binder system can penetrate the pores, the amount of aqueous binder system required is reduced.
  • the coal particles to be processed into compacts become
  • a moisture content of less than 8% by weight preferably to a moisture content of less than 7% by weight.
  • a moisture in a range from greater than or equal to 4% by weight to less than 8% by weight is particularly preferred, a moisture in a range from greater than or equal to 5% by weight to less than 7% by weight is particularly preferred.
  • the aqueous binder system may contain one or more other components besides water.
  • the impregnation step may consist of steaming the carbon particles with the substance, spraying the carbon particles with the substance, mixing the substance into a moving bed of carbon particles, or mixing the substance into one
  • Fluidized bed of coal particles exist.
  • It may be subjected to at least two impregnation steps, a subset or all of the coal particles to be processed into compacts. It can also be three, four, five, six, seven, eight, nine, ten or more impregnation steps. If the total amount of carbon particles to be processed into compacts is subjected to at least two impregnation steps, the above-described effects of the impregnation will occur in the total amount of coal particles to be processed into compacts.
  • Impregnant consumed as in an impregnation of the entire Compacts to be processed coal particles is consumed as in an impregnation of the entire Compacts to be processed coal particles.
  • the above-described effects of impregnation occur in the subset and thus contribute to an improvement in the properties of the compact.
  • a first impregnation will improve the efficiency and / or durability of a subsequent impregnation.
  • the effect caused by the impregnation may decrease with increasing age of the pellets - for example, such that the briquettes behave brittle after a certain time.
  • Pores have been caused by the impregnating agent or separation of the impregnating agent from the pore walls, for example due to cooling and / or contraction.
  • different impregnating agents can be used for the first and second impregnation steps.
  • penetration and subsequent closure of pores that were still incomplete or not sealed after the first impregnation step can take place-because the impregnation agent in the second impregnation step is, for example, another
  • Viscosity and / or other wetting properties against the carbon particles has.
  • the carbon particles can be impregnated in all impregnation steps with the same substance. In different impregnation steps can also be used.
  • the substance with which it is impregnated is preferably used as a liquid or by means of a liquid for impregnation.
  • a liquid for example, substances that are liquid at the temperature prevailing at the impregnation step are.
  • Impregnation by means of a liquid denotes, for example, impregnation with substances which, although they are not themselves liquid under the conditions prevailing during the impregnation step, are emulsified or suspended in a liquid.
  • the carbon particles to be impregnated are preferably heated to a temperature at which the substance is liquid.
  • the substance impregnated with the carbon particles in at least one of the impregnation steps is water.
  • Carbon carriers having a low moisture content than these compacts can limit the water input into the pig iron production process to an acceptable level.
  • the substance with which carbon particles are impregnated in at least one of the impregnation steps is a water-insoluble and / or water-repellent substance.
  • the water-insoluble and / or water-repellent substance preferably belongs to that from waxes, organic coking or refinery products, as well as plastics
  • the impregnation step is advantageously carried out at a temperature at which the water-insoluble and / or water-repellent substance is liquid, in particular viscous.
  • the water-insoluble and / or water-repellent substance solidifies on cooling in the exit points of the pores on the coal particle surface.
  • the substance with which carbon particles are impregnated in at least one of the impregnation steps is an aqueous solution of a substance or a mixture of substances.
  • a substance or a mixture of substances for example, it is molasses, which is an aqueous solution of a mixture of carbohydrates and other natural products.
  • dissolved substances of all kinds which improve the hot strength and cold strength of the compacts, can be used, for example starch or lignin bases from waste liquors of pulp production.
  • the substance with which the carbon particles are impregnated in at least one of the impregnation steps is an aqueous one
  • Suspension of solid colloids wherein the solid has water-repellent properties.
  • examples include suspensions of colloidal talc, graphite or waxes in water. If the solids settle in the pores or in the pore necks, the entry of water-containing binder systems is made more difficult due to the high surface tension of the water-repellent solids.
  • the substance with which the carbon particles are impregnated in at least one of the impregnation steps an emulsion containing on the one hand water and on the other hand carbonaceous substances such as bitumens, raw tars obtained from hard coal, pitches, waxes, oils.
  • the lower limit of the amount of substance added in the impregnation step, called impregnating agent, is 0.5% by weight, preferably 1% by weight
  • the upper limit is 5% by weight, preferably 3% by weight, more preferably 2% by weight, based on the weight of the compacts to be processed good, so the coal particles.
  • Addition of more than 5% by weight of impregnating agent does not make economic sense. If less than 0.5% by weight of impregnating agent is added, impregnation is no longer effective.
  • Binder system molasses and quicklime or hydrated lime. It can also consist of these components.
  • the binder system contains molasses in combination with strong inorganic acids, such as phosphoric acid, sulfuric acid, nitric acid.
  • Binder system an emulsion of bitumen in water. It can also consist of such an emulsion.
  • the binder system contains products from waste liquors of pulp production, starches, cellulose, beet pulp, waste paper pulp, groundwood, or long-chain polyelectrolytes such as carboxymethylcellulose.
  • quicklime or hydrated lime binder systems have the disadvantage that quicklime CaO and hydrated lime Ca (OH) 2 increase the reactivity of the pellets against hot C0 2 -containing gases due to catalytic activity, have the Embodiments without lime or hydrated lime have the advantage of providing compacts with comparatively lower reactivity.
  • iron or iron oxide-containing particles are processed in a mixture with the carbon particles.
  • Pressings are subjected to a heat treatment after the pressing.
  • the heat treatment is carried out at a temperature higher than the pressure.
  • the heat treatment causes a drying and / or hardening of the compacts.
  • Heat treatment can be carried out at temperatures of preferably> 250 ° C and ⁇ 350 ° C, where irreversible chemical processes can convert binder components.
  • water-soluble binder components may be rendered water-insoluble
  • the compounds formed during such conversions can contribute to the
  • molasses-containing binder system for example, a conversion of molasses by caramelization.
  • a conversion of molasses by caramelization for example, a conversion of molasses by caramelization.
  • the heat treatment causes a drying.
  • the heat treatment additionally causes a concentration of the solutions, suspensions or emulsions and, accordingly, one
  • Components may, in addition to the aqueous binder system added thereafter, contribute to increased hot strength and cold strength
  • the heat treatment can be the transformation of the due
  • Heat treatment initially resulting coating the pore walls in water-insoluble compounds, or cause in the reactivity of the carbon particles to hot C0 2 containing gases lowering compounds.
  • Maximum temperature of the heat treatment is due to the pyrolysis of the carbon particles limited and is at 350 ° C.
  • Heat treatment is 150 ° C.
  • Impregnation step added amount less than that in the subsequent
  • Impregnation step and as a binder system is carried out in the impregnation step, an addition of 2 -3% by weight, while added as a binder later 7-10% by weight.
  • Impregnation step and as a binder system is carried out in the impregnation step, an addition of 3 to 5% by weight, while added as a binder later 6 to 8% by weight.
  • the limits of the specified ranges are included.
  • a heat treatment is necessary to remove the carrier liquid water so far that the emulsified substances or the dissolved substances settle in the pores or the pore necks. As a result, the pores are occupied or the
  • the processing into compacts after the impregnation steps can be carried out by known methods, for example as described in WO 02 / 50219A1 or in AT005765U 1, or by any method suitable for processing coal particles with a water-containing binder system into compacts.
  • Drying costs are reduced, resulting in an energy savings. Accordingly, since the provision or operation of devices for post-drying can be dispensed with, or the dimensions of the devices and the cost of their operation can be reduced, this is equivalent to operating cost and investment cost reduction.
  • a reduction in the C0 2 reactivity of the resulting after pyrolysis of the pellets in a melter carburetor or the cokes obtained from compacts may result.
  • a low CO 2 reactivity is desired in the operation of a melter gasifier so that the semi-coke in the fixed bed of the melter gasifier or the coke in the fixed bed of a blast furnace remain stable from the charge to the bed surface until reaching the immediate gasification zone in the area of the oxygen nozzles or the tuyeres and thereby promote the permeability of the fixed bed with respect to the gassing and the drainage of molten phases.
  • the reduction of the C0 2 reactivity of the coke or the coke is achieved in that the inner surface of the pores of the carbon particles in the compact can no longer be coated by the impregnation of a binder which contains reactivity-promoting substances.
  • the binder component molasses contains alkalis as reactivity-promoting substances. If the impregnation, for example with substances containing bitumen or waxes, prevents molasses coating the inner surface of the pores, the C0 2 reactivity is thus reduced compared to semi-coke or coke obtained by a process without impregnation step.
  • a minor proportion of undersized coke is commonly used in the COREX® or Fl N EX® process for the production of pig iron in a fixed bed of a melter gasifier
  • Thermo-mechanical stability refers to a test method in which the compacts are subjected to a thermal shock procedure, and the resulting semi-coke is subjected to drumming.
  • the improved thermo-mechanical stability is represented by the fact that the proportion of coarse grain of the tumbled Halbkokses compared to conventionally produced compacts by the inventive
  • the inventive method for the production of compacts makes it possible to reduce the consumption of binder or to curb the harmful effects of reactant-promoting binder components even in the production of coke using compacts of the starting materials.
  • the compacts may be, for example, briquettes or slugs from a compaction.
  • the pellets contain up to 97% by weight of carbon particles,
  • 0.5% by weight preferably 1% by weight, and the upper limit thereof is 5% by weight, preferably 3% by weight, particularly preferably 2% by weight
  • the 15% by weight of the components of a binder system are to be understood as meaning that the water is not included as a component of the binder system, ie the 15% by weight relates to the nonaqueous components of the binder
  • the compact also contains iron or iron oxide-containing particles.
  • Such particles can, for example, in the pig iron or
  • Table 1 shows the evaluation of tests for the production of compacts with regard to the drop resistance (SF) and the puncture strength (PDF) of the pellets during a test campaign.
  • the pellets are after the
  • the compacts are briquettes.
  • the water-containing binder system a system consisting of molasses and quicklime was used.
  • the molasses itself had a water content of 20
  • Impregnating agent used As bitumen Mexphalte 55 Shell was used. The commercial hydraulic oil used was less viscous than the bitumen under the conditions of use.
  • the kneading machine from Köppern used for kneading purposes consisted of a vertical cylindrical container, through which a centrally rotating shaft with kneading arms is guided.
  • Green compacts had a nominal volume of 20 cm 3 .
  • the task of the material to be pressed was done by means of gravitational arbiter. From the experimental roller press associations were made consisting of several green compacts. These associations contain green compacts both in the margins of the associations and in the middle of the associations.
  • the bandages are broken along the dividing seams between the individual green compacts.
  • the associations break up during discharge from the trial roller press into individual green compacts. After kneading in the kneader, the kneaded mixtures were subjected to pressing as a material to be pressed in the trial roll press to produce green compacts.
  • the resulting green compacts are still soft - which is indicated in the jargon by the word "green” - and are subjected to curing to arrive at the finished compact This curing, for example, by at least partial drying by storage in air and / or a thermal treatment done.
  • a type 469 testing machine from ERICHSEN was used for the determination of the dot compressive strength.
  • the lower edition is formed by a round plate of 80 mm diameter and the upper by a horizontal round iron of 10 mm diameter.
  • the Feed rate for the upper support is 8 mm / min.
  • Puncture resistance PDF is considered a maximum load bearing of a green
  • Table 1 indicate the average point compressive strength at break due to point pressure loading in Newton.
  • six green compacts or compacts from the middle region and six green compacts or pellets from the edge region of the bandages obtained in the trial roller press were examined. From the data obtained in these studies, averages were calculated, with the minimum and maximum values, respectively, being disregarded.
  • Particle size d50 of 0.95 mm together with 30% by weight of Ensham coal with a mean particle size d50 of 0.57 mm is used as material to be processed into pellets of carbon particles.
  • This material to be processed into compacts was processed into compacts by impregnating by subjecting the coal to be processed to drying and then by granulation to a desired grain size.
  • the resulting carbon particles are subjected to an impregnation step with the addition of bitumen.
  • To the carbon particles thus obtained then takes place the addition of a water-containing binder system, in this case molasses with the addition of the solid, finely divided binder component quicklime, with mixing, wherein the mixing can be one or more stages.
  • the resulting mixture is subjected to kneading and pressing.
  • the product obtained after curing is the briquette.
  • Ensham coal comes from Ensham Resources of Queensland, Australia.
  • the molasses in the water-containing binder system was used in an amount of 8% by weight, based on the weight of the material to be processed into compacts.
  • the molasses itself contained a proportion of 20% by weight of water.
  • the water-containing binder system consisted of 2% by weight, based on the weight of the material to be processed into compacts, Ensham coal, of burnt lime.
  • the amount of bitumen used was 2% by weight, based on the weight of the material to be processed into compacts. After impregnation with bitumen, the processing was carried out analogously to experiment 1 after its only impregnation step.
  • the temperature of the coal treated with oil and bitumen was 53 ° C before the molasses addition.
  • One part can also be impregnated with one part in 2 or more stages, while the other part is not impregnated or only impregnated in one stage.
  • the method according to the invention is outlined below with reference to the block diagrams shown in FIGS. 1 to 3.
  • the coal 1 to be processed into compacts in this case briquettes, is subjected to drying 2 and then brought to a desired grain size by granulation 3.
  • the carbon particles 4 thus obtained are then subjected to a first impregnation step 6 with the addition of a first impregnating agent 5.
  • the product 7 of the first impregnation step 6 is subjected to a second impregnation step 8 with a second impregnation agent 9.
  • To the product 10 of the second impregnation step 8 then takes place the addition of a water-containing
  • Binder system 1 in this case molasses with the addition of solid, finely divided
  • the mixture 13 thus obtained is subjected to kneading 14 and then to pressing 15.
  • the product 17 obtained after curing 16 is the briquette.
  • the addition of the molasses / quicklime binder system to the product to be processed can be done by adding molasses and quicklime at the same time, or by adding quicklime and molasses in succession.
  • Moisten moisture This can be done with water or part of the aqueous molasses done the binder system. For this purpose, up to half, preferably up to one third of the molasses can be used.

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Abstract

La présente invention concerne un procédé de production de produits pressés contenant des particules de carbone, les produits pressés ainsi obtenus et leur utilisation dans des procédés de production de fonte brute dans un lit fixe ou dans des procédés de production de porteurs de carbone pour des procédés de production de fonte brute dans un lit fixe. Selon l'invention, au moins une partie des particules de carbone est soumise à au moins deux étapes d'imprégnation lors desquelles lesdites particules sont imprégnées à l'aide d'au moins une substance, avant d'être mélangées avec le système liant contenant de l'eau.
PCT/EP2011/061619 2010-07-12 2011-07-08 Procédé de production de produits pressés contenant des particules de carbone Ceased WO2012007385A1 (fr)

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US13/809,968 US20130174695A1 (en) 2010-07-12 2011-07-08 Method for producing pressed articles containing coal particles
EP11738661.5A EP2593536B1 (fr) 2010-07-12 2011-07-08 Procédé de production de produits pressés contenant des particules de carbone
CN201180033650.0A CN102959058B (zh) 2010-07-12 2011-07-08 含煤颗粒的压制品的制备方法
KR1020137003563A KR20130096705A (ko) 2010-07-12 2011-07-08 석탄 입자를 함유하는 압축물을 생산하기 위한 방법

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ATA1179/2010 2010-07-12
ATA1179/2010A AT510135B1 (de) 2010-07-12 2010-07-12 Verfahren zur herstellung von kohlepartikeln enthaltenden presslingen

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CN106525525B (zh) * 2016-10-21 2020-02-04 中联煤层气国家工程研究中心有限责任公司 一种人工煤心标准试件的制作方法
CN111621314B (zh) * 2020-06-11 2021-11-02 河北中煤旭阳能源有限公司 捣固配煤炼焦方法
US12000011B2 (en) * 2021-06-22 2024-06-04 Midrex Technologies, Inc. System and method for the production of hot briquetted iron (HBI) containing flux and/or carbonaceous material at a direct reduction plant
CN113696297A (zh) * 2021-08-20 2021-11-26 广州厚邦木业制造有限公司 以复合材料为芯板的地板制备工艺及其地板

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US2310095A (en) 1940-05-23 1943-02-02 Ernest T Lance Production of lignite briquettes
EP0368041A1 (fr) 1988-10-29 1990-05-16 Th. Goldschmidt AG Briquettes de charbon ayant une absorption d'eau diminuée et procédé pour sa préparation
WO1999001583A1 (fr) 1997-07-04 1999-01-14 Voest-Alpine Industrieanlagenbau Gmbh Procede d'utilisation de fines dans un gazeificateur a fusion
WO2002050219A1 (fr) 2000-12-19 2002-06-27 Posco Briquette de charbon d'une resistance elevee et procede de briquetage associe
AT5765U1 (de) 2001-09-14 2002-11-25 Voest Alpine Ind Anlagen Verfahren zur verhüttung eines metallhaltigen einsatzstoffes, vorzugsweise zur erzeugung von roheisen und/oder flüssigen stahlvorprodukten
WO2004020555A1 (fr) 2002-09-02 2004-03-11 Posco Briquettes de charbon pour methode de reduction avec fusion, et procede de fabrication de ces briquettes
WO2010081620A1 (fr) * 2009-01-16 2010-07-22 Siemens Vai Metals Technologies Gmbh & Co Procédé de fabrication de pièces moulées contenant des particules de charbon

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US1551966A (en) 1923-11-14 1925-09-01 Themselves Process of preparing materials for briquetting and the product thereof
US2310095A (en) 1940-05-23 1943-02-02 Ernest T Lance Production of lignite briquettes
EP0368041A1 (fr) 1988-10-29 1990-05-16 Th. Goldschmidt AG Briquettes de charbon ayant une absorption d'eau diminuée et procédé pour sa préparation
WO1999001583A1 (fr) 1997-07-04 1999-01-14 Voest-Alpine Industrieanlagenbau Gmbh Procede d'utilisation de fines dans un gazeificateur a fusion
WO2002050219A1 (fr) 2000-12-19 2002-06-27 Posco Briquette de charbon d'une resistance elevee et procede de briquetage associe
AT5765U1 (de) 2001-09-14 2002-11-25 Voest Alpine Ind Anlagen Verfahren zur verhüttung eines metallhaltigen einsatzstoffes, vorzugsweise zur erzeugung von roheisen und/oder flüssigen stahlvorprodukten
WO2004020555A1 (fr) 2002-09-02 2004-03-11 Posco Briquettes de charbon pour methode de reduction avec fusion, et procede de fabrication de ces briquettes
WO2010081620A1 (fr) * 2009-01-16 2010-07-22 Siemens Vai Metals Technologies Gmbh & Co Procédé de fabrication de pièces moulées contenant des particules de charbon

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KR20130096705A (ko) 2013-08-30
EP2593536A1 (fr) 2013-05-22
AT510135A1 (de) 2012-01-15
AT510135B1 (de) 2016-11-15
US20130174695A1 (en) 2013-07-11
CN102959058B (zh) 2014-10-29
EP2593536B1 (fr) 2014-10-29

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