WO2017052042A1 - Charbon moulé, procédé de fabrication et appareil de fabrication associés, et procédé de fabrication de fer fondu - Google Patents

Charbon moulé, procédé de fabrication et appareil de fabrication associés, et procédé de fabrication de fer fondu Download PDF

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Publication number
WO2017052042A1
WO2017052042A1 PCT/KR2016/007135 KR2016007135W WO2017052042A1 WO 2017052042 A1 WO2017052042 A1 WO 2017052042A1 KR 2016007135 W KR2016007135 W KR 2016007135W WO 2017052042 A1 WO2017052042 A1 WO 2017052042A1
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WIPO (PCT)
Prior art keywords
coal briquettes
coal
heat treatment
briquettes
reduced iron
Prior art date
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PCT/KR2016/007135
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English (en)
Korean (ko)
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WO2017052042A8 (fr
Inventor
박우일
김상현
김홍산
김현정
최무업
Original Assignee
주식회사 포스코
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Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to EP16848768.4A priority Critical patent/EP3354712B1/fr
Priority to CN201680055957.3A priority patent/CN108138064A/zh
Priority to BR112018005949A priority patent/BR112018005949A2/pt
Publication of WO2017052042A1 publication Critical patent/WO2017052042A1/fr
Publication of WO2017052042A8 publication Critical patent/WO2017052042A8/fr

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    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
    • C10L5/28—Heating the shaped fuels, e.g. briquettes; Coking the 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • 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
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/02—Combustion or pyrolysis
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/04—Gasification
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/06—Heat exchange, direct or indirect
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/08—Drying or removing water
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
    • C10L2290/141—Injection, e.g. in a reactor or a fuel stream during fuel production of additive or catalyst
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
    • C10L2290/145—Injection, e.g. in a reactor or a fuel stream during fuel production of air
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
    • C10L2290/146—Injection, e.g. in a reactor or a fuel stream during fuel production of water
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
    • C10L2290/148—Injection, e.g. in a reactor or a fuel stream during fuel production of steam
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/24—Mixing, stirring of fuel components
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/30—Pressing, compressing or compacting
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/32—Molding or moulds
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/36—Applying radiation such as microwave, IR, UV
    • 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, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/52—Hoppers

Definitions

  • the present invention relates to coal briquettes, a method for producing the same, a manufacturing apparatus, and a method for producing molten iron. More specifically, the present invention relates to a coal briquettes, a method for manufacturing the same, a manufacturing apparatus, and a method for manufacturing molten iron, which are capable of securing compressive strength even for coal briquettes having a high moisture content.
  • a reduction furnace for reducing iron ore and a melt gasification furnace for melting reduced iron ore are used.
  • coal briquettes are charged into the melt gasifier as a heat source for melting iron ore.
  • the reduced iron is melted in the molten gasifier, converted to molten iron and slag, and then discharged to the outside.
  • the coal briquettes charged into the melt gasifier form a coal seam layer.
  • Oxygen is blown through the tuyere installed in the melt gasifier and then burns the coal packed bed to produce combustion gas.
  • Combustion gas is converted into hot reducing gas while rising through the coal-filled bed.
  • the high temperature reducing gas is discharged to the outside of the melt gasification furnace and supplied to the reduction furnace as reducing gas.
  • Coal briquettes are prepared by mixing pulverized coal and a binder. In order to use molten iron, it is necessary to manufacture coal briquettes having excellent cold strength and hot strength. Therefore, coal briquettes are manufactured using a binder having excellent viscosity such as molasses.
  • the present invention also provides a method and a manufacturing apparatus for the coal briquettes described above. And to provide a molten iron manufacturing method including the above-described method for producing coal briquettes.
  • Coal briquettes according to an embodiment of the present invention is charged into the dome portion of the molten gasifier in the molten gasifier in the molten iron manufacturing apparatus including i) a molten gasifier is charged with reduced iron, and ii) a molten gasifier, and a reducing furnace providing reduced iron. It is heated rapidly.
  • Method for producing coal briquettes i) providing a fine coal, ii) mixing a binder in the fine coal to provide a mixture, iii) forming a mixture to provide coal briquettes, And iv) heating the coal briquettes to increase compressive strength.
  • the method for manufacturing coal briquettes according to the embodiment of the present invention may further include a step of mixing water by adding water to the mixture after the providing of the mixture.
  • the binder may be a water soluble binder.
  • the binder may be at least one selected from cellulose ether compound, PVA, Lignin, starch.
  • Cellulose ether compounds include methylcellulose (this hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), hydroxypropylmethylcellulose (HPMC). And hydroxyethylmethylcell. It may include at least one compound selected from the group consisting of (HEMC).
  • the cellulose ether compound may not include carboxymethyl cel lulose (CMC).
  • the viscosity of the cellulose ether compound may be between 4, 000 cps and 80, 000 cps.
  • Method for producing coal briquettes according to an embodiment of the present invention may further comprise the step of drying the mixture after the step of mixing by adding water to the mixture.
  • the amount of moisture contained in the coal briquettes may be 8wt% to 15wt%.
  • the heating for the coal briquettes may be performed for 1 to 24 hours at a temperature of 80 to 150 ° C.
  • the coal briquettes may be heated to have a moisture content of 5 wt% or less.
  • the coal briquettes are heated to have a compressive strength of 100 kgf or more. Can be.
  • the coal briquettes ⁇ may be heated using at least one selected from hot air, steam, near infrared rays, and microwaves.
  • the heat treatment step may include transferring the coal briquettes to the storage bin, supplying hot hot air into the storage bin, heating the coal briquettes, and discharging the heat-treated coal briquettes from the storage bin.
  • the temperature of the hot air introduced into the storage bin may be 80 to 150 ° C.
  • the heat treatment step may further include discharging the water vapor evaporated from the coal briquettes by the hot hot air through the upper part of the storage bin.
  • Apparatus for manufacturing coal briquettes comprises a coal briquette machine manufactured in a briquette machine and a briquette machine for producing coal briquettes by mixing a mixture including fine coal and a water-soluble binder and a mixture mixed in the mixer. It may include a heat treatment to increase the compressive strength by heating.
  • the heat treatment unit is connected to a briquette machine to store the coal briquettes, connected between the lower part of the storage bin and the heat source, and connected to the hot air supply pipe for supplying hot air into the storage bin, and to the upper blowwe storage bin installed in the hot air supply pipe to evaporate from the coal briquettes. It may include a discharge line for discharging the water vapor.
  • a method for manufacturing molten iron includes i) providing coal briquettes manufactured according to the aforementioned method, ii) providing reduced iron obtained by reducing iron ore in a reduction furnace, and iii) melting gasification of coal briquettes and reduced iron. Charging the furnace to provide molten iron.
  • the reduction furnace may be a fluidized bed reduction furnace or a packed bed reduction furnace.
  • Coal briquettes according to an embodiment of the present invention is charged into the dome of the molten gasifier in the molten iron gasifier comprising i) a molten gasifier is charged with reduced iron, and ii) a molten gasifier, and a reducing furnace providing reduced iron. It is heated rapidly.
  • the coal briquettes may contain 5 wt% or less of water.
  • the coal briquettes may have a compressive strength of 100 kgf or more.
  • FIG. 1 is a schematic diagram showing a coal briquette manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method of manufacturing coal briquettes according to an embodiment of the present invention.
  • FIG. 2 is a flowchart schematically illustrating a process of heat-treating the coal briquettes by the method for manufacturing coal briquettes according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an apparatus for manufacturing molten iron using the coal briquettes manufactured in FIG. 1.
  • FIG. 5 is a schematic diagram of another apparatus for manufacturing molten iron using the coal briquettes manufactured in FIG. 1.
  • Figure 6 is a graph showing the experimental results for the compressive strength of the coal briquettes prepared according to this embodiment.
  • Figure 7 is a graph showing the experimental results for the compressive strength of the coal briquettes prepared according to this embodiment.
  • FIG. 9 is a graph showing the experimental results for the compressive strength of the coal briquettes prepared according to the present embodiment.
  • first, second, and third include various partial components, regions, layers And / or sections, but are not limited to these. These terms are only used to distinguish one part component, region, layer or section from another part, component, region, layer or section. Accordingly, the first portion, component, region, layer or section described below may be referred to as the second portion, component, region, layer or section without departing from the scope of the present invention.
  • FIG. 1 schematically shows an apparatus for manufacturing coal briquettes according to an embodiment of the present invention.
  • the coal briquette manufacturing apparatus 60 includes a mixer 64 for mixing pulverized coal and a binder supplied from a pulverized coal hopper 61 for storing pulverized coal and a binder hopper 62 for storing a binder.
  • Briquette machine 65 for forming a coal briquette by molding the mixture mixed in the mixer 64, a heat treatment unit for heating the coal briquettes produced in the briquette machine to increase the compressive strength.
  • the manufacturing apparatus may further include a water supply unit 63 for supplying water to the combiner.
  • the briquette machine 65 is made of coal briquettes by compressing the mixture.
  • the briquette machine 65 may be provided with a pair of lorries, and may produce coal briquettes in the form of pockets or strips by inserting and compressing the mixture between the lorries.
  • the heat treatment unit is intended to increase the compressive strength by applying energy to the coal briquettes, and may have a structure of heating the coal briquettes by using high temperature hot air or by applying steam, near infrared rays or microwaves to the coal briquettes.
  • the heat treatment unit is connected to the briquette machine 65 is connected between the storage bin 66, the lower storage bin 66 and the heat source 67 to accommodate the coal briquettes to supply hot air into the storage bin 66. It includes a hot air supply pipe 68, a blower 69 is installed in the hot air supply pipe.
  • the storage bin 66 stores the coal briquettes manufactured and conveyed in the briquette machine 65.
  • the coal briquettes are supplied to the upper portion of the storage bin 66 and discharged through the lower portion.
  • a discharge device for quantitatively discharging the coal briquettes is installed at the bottom of the storage bin 66.
  • the discharge device is a constant discharged to 0 ⁇ 50t / h of coal briquettes stored in the storage bin.
  • a discharge line 70 for discharging water vapor evaporated from the coal briquettes is installed at an upper portion of the storage bin 66, and a dust collecting equipment 71 is connected to the discharge line 70.
  • the crystals evaporated from the coal briquettes through heat treatment are discharged to the dust collector 71 for processing.
  • the axial water may be generated, and a boeun device (not shown) may be further provided to prevent the axial water from entering the storage bin again.
  • the hot air supply pipe 68 is installed at one lower side of the storage bin 66.
  • the hot air supplied into the storage bin 66 through the hot air supply pipe 68 is moved upward to heat the coal briquettes to evaporate the moisture contained in the coal briquettes.
  • the blower 69 forcibly supplies the hot air heated by the heat source 67 to the hot air supply pipe.
  • the heat source 67 may be a structure using commercial fuel such as LNG or LPG. have. Alternatively, it may be a structure using a by-product gas in the steel mill, such as FOG, COG or BFG.
  • the heat source 67 may recover and use waste heat generated in a steel mill, such as a direct heating structure such as an electric heater or slag heat, waste heat generated when oxidized reduced iron is oxidized.
  • a direct heating structure such as an electric heater or slag heat
  • the water content increases as the water-soluble be secured initially seonghyeongtan can be heated to seonghyeongtan on seonghyeongtan production line ensuring a nyaenggan strength of seonghyeongtan soon yo.
  • FIG. 2 schematically shows a flow chart of a method for producing coal briquettes according to an embodiment of the present invention.
  • the flowchart of the coal briquettes and the manufacturing method of FIG. 2 is for illustration only, and this invention is not limited to this. Therefore, the manufacturing method of the coal briquettes can be variously modified.
  • the method for manufacturing coal briquettes includes: providing fine coal, (S100) mixing a binder with fine coal (S100) to provide a mixture (S200), and molding the mixture to provide coal briquettes ( S300), and a heat treatment step (S400) of heating the coal briquettes to increase the compressive strength.
  • the coal briquetting method according to an embodiment of the present invention may further comprise the step (S210) of mixing by adding water to the mixture of pulverized coal and a binder.
  • the method of manufacturing coal briquettes may further include other steps.
  • step S100 pulverized coal is provided.
  • raw materials containing carbon such as bi tuminous coal, subbi tuminous coal, anthracite and coke may be used.
  • the particle size of can be adjusted below 4 ⁇ . '
  • step S200 a binder is mixed with pulverized coal to provide a mixture. That is, after adding the binder to the pulverized coal, the mixture is mixed so that it is uniformly mixed. Mix well.
  • the binder may be a water-soluble binder.
  • the binder may be at least one selected from cellulose ether compounds, PVA, Lignin, and starch.
  • the viscosity of the cellulose ether compound may be 4, 000cps to 80,000cps.
  • the viscosity of the cellulose ether compound was 20 ⁇ 0. using DV-n + Pro (spindle HA) from Brookf ield. It means the value measured by measuring the viscosity of the aqueous solution of cellulose ether compound having a concentration of 2% by weight at 1 ° C.
  • DV-n + Pro spindle HA
  • the viscosity of the cellulose ether compound is too high, the molecular weight of the cellulose ether compound is too high, solubility deteriorates, and thus the binding force to the pulverized coal is not sufficient. Therefore, it is preferable to adjust the viscosity of the cellulose ether compound to the above-mentioned range.
  • the cellulose ether compound may be methyl cellulose (MC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC) or hydroxyethylmethol. Celrose (HEMC) and the like.
  • Methyl cellulose (MC) has a degree of methyl group substitution of 18 to 32wt>
  • hydroxyethyl cellulose has a degree of hydroxyethyl group substitution of 20 to 80%.
  • Hydroxypropyl cellulose (HPC) has a hydroxypropyl group substitution degree of 20 to 80%
  • hydroxypropyl methyl cellulose HPMC
  • HPMC hydroxypropyl methyl cellulose
  • HEMC hydroxyethyl methyl cellulose
  • HEMC may have a degree of methyl group substitution of 18 to 32wt3 ⁇ 4> and a degree of hydroxyethyl group substitution of 2 to 14%.
  • step (S210) it can be mixed by adding water to the mixture.
  • it may be added after the step (S210) to dry the mixture. That is, when it is necessary to control the formability of the mixture containing pulverized coal, powdered cellulose ether compound and water, The mixture may be dried to remove some moisture. As a result, the strength of the coal briquettes produced in subsequent steps can be greatly improved.
  • step S300 the mixture is molded to provide coal briquettes.
  • Coal briquettes in the form of pockets or strips can be produced by charging the mixture between a pair of lorler and pressing.
  • the amount of water contained in the coal briquettes manufactured through step S300 may be 8vvt% or more.
  • the coal briquettes produced through the forming step may not be stratified due to excessive moisture content.
  • the heat treatment step (S400) is a step of transporting the coal briquettes into the storage bin (S410), supplying hot hot air into the storage bin to heat the coal briquettes (S420), heat treated coal briquettes Ejecting from the storage bin (S430).
  • the heat treatment step may further include the step (S440) of discharging the water vapor evaporated from the coal briquettes by the hot hot air through the upper portion of the storage bin.
  • the heat treatment step may further include other steps.
  • step S410 the coal briquettes are filled and filled into the storage bin.
  • the level of coal briquettes in the storage bin is maintained at an appropriate level in consideration of the level at which the coal briquettes are not destroyed by the heat treatment time or the compression load of the coal briquettes in the storage bin.
  • step S420 hot air is blown into the lower part of the storage bin.
  • the temperature of the hot air introduced into the storage bin may be 80 to 150 ° C.
  • the temperature of the hot air is lower than 80 ° C, moisture of the coal briquettes may not be evaporated properly, resulting in poor heat treatment. If the temperature exceeds 150 ° C, the coal briquettes may be cracked, and volatile matters may be lost.
  • the heating for coal briquettes is carried out at a temperature of 80 to 15 CTC. Under 1 to 24 hours. The higher the coal briquette heating temperature due to the hot air can shorten the heat treatment time, but in order to shorten it within 1 hour, hot coals must be applied at a high temperature, thereby causing loss of coal briquettes. In addition, as the coal briquettes are dried at a high temperature, only the moisture content is lowered, so that the compressive strength is rather lowered. When the coal briquette heating temperature is lower than 80 degrees, the time required for heat treatment exceeds 24 hours, and the productivity is lowered.
  • the heat treatment conditions may be relaxed or enhanced depending on the moisture content of the coal briquettes introduced into the storage bin.
  • step S420 the coal briquettes are heated by hot air to evaporate moisture.
  • step S430 the heat treated coal briquettes are discharged through the bottom of the storage bin. Water vapor evaporated from the coal briquettes through heat treatment is discharged to a dust collecting facility through step S440 and processed. At this time, by adjusting the flow rate and temperature of the hot air, it is possible to prevent the generation of condensed water.
  • the coal briquettes produced by the above-described method contains 5 wt% or less of water.
  • the coal briquettes produced by the above-described method with a reduced moisture content have a compressive strength of 100 kgf or more.
  • FIG. 4 is according to this embodiment.
  • the molten iron manufacturing apparatus 100 using the produced coal briquettes is shown schematically.
  • the structure of the molten iron manufacturing apparatus 100 of FIG. 4 is only for illustration of this invention, Comprising: This invention is not limited to this. Therefore, FIG. 4 and the apparatus for manufacturing molten iron 100 may be modified in various forms.
  • the apparatus for manufacturing molten iron 100 of FIG. 4 includes a melt gasifier 10 and a packed-bed reduction furnace 20. In addition, other devices may be included as needed.
  • iron ore is charged and reduced.
  • the iron ore charged into the packed-bed reduction furnace 20 is made of reduced iron while being pre-dried and then passed through the layered-layer reduction furnace 20.
  • the layered layer reduction furnace 20 is a packed-bed reduction furnace, and receives the reducing gas from the melt gasifier 10 to form a layered layer therein. Since the coal briquettes produced according to this embodiment are charged into the melt gasifier 10, a coal seam layer is formed inside the melt gasifier 10.
  • the dome part 101 is formed in the upper part of the melt gasifier 10.
  • a bulk coal material or coke may be charged into the melt gasifier 10 as necessary.
  • An air vent 30 is provided on the outer wall of the melt gasifier 10 to blow in oxygen. Oxygen is blown into the coal packed bed to form a combustion zone.
  • the coal briquettes may be burned in a combustion zone to generate reducing gas.
  • FIG. 5 schematically shows an apparatus for manufacturing molten iron 200 using coal briquettes manufactured according to the present embodiment.
  • the structure of the apparatus for manufacturing molten iron 200 of FIG. 5 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the apparatus for manufacturing molten iron 200 of FIG. 5 may be modified in various forms. Since the structure of the apparatus for manufacturing molten iron 200 of FIG. 5 is similar to that of the apparatus for manufacturing molten iron 100 of FIG. 2, the same reference numerals are used for the same parts, and a detailed description thereof will be omitted.
  • the molten iron manufacturing apparatus 200 includes a melt gasifier 10, a fluidized bed reduction furnace 22, a reduced iron compression device 40, and a compressed reduced iron storage tank 50.
  • the reduced reduced iron storage tank 50 can be omitted.
  • the produced coal briquettes are charged into the melt gasifier 10.
  • seonghyeongtan is generated a reducing gas in the melter-gasifier (10) and "generate a reducing gas is supplied to the fluidized-bed reduction reactor 22.
  • the fine iron ores are reduced in a plurality of fluidized bed with a 22 It is made of reduced iron while being supplied and flowed by the reducing gas supplied from the melt gasifier 10 to the fluidized bed reduction furnace 22.
  • the reduced iron is compressed by the reduced iron compression device 40 and then stored in the reduced reduced iron storage tank 50. Compressed reduced iron is compressed reduced iron . Charged together with the coal briquettes from the storage tank 50 to the molten gasifier 10 is melted in the molten gasifier (10).
  • coal briquettes are supplied to the melt gasifier 10 and changed into air permeable, a large amount of gas and compressed reduced iron generated in the lower portion of the melt gasifier 10 make the coal seam layer in the melt gasifier 10 more easily and uniformly. Can pass through to provide high quality molten iron.
  • Pulverized coal for coal briquettes and a binder having an average property used for molten reduced iron were prepared and mixed. Pulverized coal has a particle size of 4 mm or less. The pulverized coal was further mixed with a carbon source additive.
  • a carbon source additive As the binder, Ferrobine TM binder provided by Sangsung Fine Chemical Co., Ltd. was used. 1 part by weight of the binder was added to 100 parts by weight of pulverized coal, and 7 parts by weight of fire was added to mix uniformly. Then, the prepared mixture was charged between a pair of rolls and compressed to prepare a coal briquette having a size of 52 ml. Detailed manufacturing process of the remaining coal briquettes can be easily understood by those of ordinary skill in the art, the detailed description thereof will be omitted.
  • the manufactured coal briquettes were heat-treated using a well-ventilated heat-treatment oven to evaporate moisture.
  • coal briquettes with an initial moisture content of 8.8 wt% and a compressive strength of 39.5 kgf were heated to heat the oven at a temperature of S 0 ° C.
  • Coal briquettes having an initial moisture content of 9.63 wt% and a compressive strength of 52.21 kgf were heat-treated at a temperature of 120 ° C. in a heat treatment oven.
  • Coal briquettes having an initial moisture content of 9.21 wt% and a compressive strength of 51.36 kgf were heat-treated at a temperature of 150 ° C. in a heat treatment oven.
  • Coal briquettes prepared in the same manner as in Example were stored at room temperature for 24 hours.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
  • Mold Materials And Core Materials (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

L'invention concerne du charbon moulé, un procédé de fabrication associé et un procédé de fabrication de fer fondu. Le charbon moulé est chargé dans la partie de dôme d'un four de fusion-gazéification, dans un appareil de production de fer fondu, et est rapidement chauffé, l'appareil de fabrication de fer fondu comprenant : i) le four de fusion-gazéification dans laquelle le fer réduit doit être chargé ; et ii) un four de réduction relié au four de fusion-gazéification et produisant du fer réduit. Le procédé de fabrication de charbon moulé comprend : i) une étape consistant à fournir des fines de charbon; ii) une étape consistant à préparer un mélange en mélangeant les fines de charbon et un liant ; iii) une étape consistant à préparer le charbon moulé en moulant le mélange ; et iv) une étape par traitement thermique d'augmentation de la résistance à la compression par chauffage du charbon moulé.
PCT/KR2016/007135 2015-09-25 2016-07-01 Charbon moulé, procédé de fabrication et appareil de fabrication associés, et procédé de fabrication de fer fondu WO2017052042A1 (fr)

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EP16848768.4A EP3354712B1 (fr) 2015-09-25 2016-07-01 Procédé de fabrication de charbon moulé et de fer fondu
CN201680055957.3A CN108138064A (zh) 2015-09-25 2016-07-01 型煤、型煤制备方法和装置及铁水制备方法
BR112018005949A BR112018005949A2 (pt) 2015-09-25 2016-07-01 briquetes de carvão, método para fabricar os mesmos, aparelho para fabricar os mesmos e método para fabricar ferro fundido

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KR10-2015-0137117 2015-09-25
KR1020150137117A KR101696628B1 (ko) 2015-09-25 2015-09-25 성형탄, 그 제조 방법과 제조 장치 및 용철 제조 방법

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KR20080062834A (ko) * 2006-12-29 2008-07-03 신병천 분광의 자동성형장치
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KR20140081514A (ko) * 2012-12-21 2014-07-01 주식회사 포스코 성형탄 및 그 제조 방법

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JPH0635623B2 (ja) * 1989-04-12 1994-05-11 日本磁力選鉱株式会社 炭素粉の製団方法
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JP2008138021A (ja) * 2006-11-30 2008-06-19 Nippon Steel Corp コークス炉の石炭事前処理方法及び装置
KR20080062834A (ko) * 2006-12-29 2008-07-03 신병천 분광의 자동성형장치
KR101259338B1 (ko) * 2011-09-23 2013-05-06 주식회사 포스코 수용성 바인더를 이용한 성형탄 및 그 제조방법
KR20140081514A (ko) * 2012-12-21 2014-07-01 주식회사 포스코 성형탄 및 그 제조 방법

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EP3354712A1 (fr) 2018-08-01
BR112018005949A2 (pt) 2018-10-09
WO2017052042A8 (fr) 2017-06-08
CN108138064A (zh) 2018-06-08
KR101696628B1 (ko) 2017-01-16
EP3354712A4 (fr) 2018-08-01

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