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WO2018070681A1 - Procédé de fabrication de briquette et appareil de fabrication de briquette - Google Patents

Procédé de fabrication de briquette et appareil de fabrication de briquette Download PDF

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Publication number
WO2018070681A1
WO2018070681A1 PCT/KR2017/010251 KR2017010251W WO2018070681A1 WO 2018070681 A1 WO2018070681 A1 WO 2018070681A1 KR 2017010251 W KR2017010251 W KR 2017010251W WO 2018070681 A1 WO2018070681 A1 WO 2018070681A1
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WO
WIPO (PCT)
Prior art keywords
coal
briquettes
acid
coal briquettes
weight
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/KR2017/010251
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English (en)
Korean (ko)
Other versions
WO2018070681A8 (fr
Inventor
박우일
박석인
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.)
Posco Holdings Inc
Original Assignee
Posco Co 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 Posco Co Ltd filed Critical Posco Co Ltd
Priority to CN201780063205.6A priority Critical patent/CN109804052A/zh
Priority to EP17860281.9A priority patent/EP3527646A4/fr
Publication of WO2018070681A1 publication Critical patent/WO2018070681A1/fr
Publication of WO2018070681A8 publication Critical patent/WO2018070681A8/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
    • 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
    • C10L5/22—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
    • C10L5/36—Shape
    • 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
    • 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
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
    • 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
    • C10L2250/00—Structural features of fuel components or fuel compositions, either in solid, liquid or gaseous state
    • C10L2250/06—Particle, bubble or droplet size
    • 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
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • 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 OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/50—Screws or pistons for moving along solids
    • 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
    • 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 and a method of manufacturing the same. More specifically, the present invention relates to coal briquettes to which bioplastics are applied and a method of manufacturing the same.
  • iron ore is used as a reducing furnace and a molten gasifier for melting the reduced iron ore.
  • a melt gasifier 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 provided in the melt gasifier, and then burns the coal seam layer to generate combustion gas.
  • the combustion gas is converted into a high temperature reducing gas while rising through the coal seam 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 made by mixing coal and a binder.
  • molasses is used as the binder.
  • the components of the molasses vary depending on the region of production, and it is difficult to control the components according to the sugar production process. Therefore, when the coal briquettes are manufactured using molasses as a binder, the quality of the coal briquettes cannot be constantly controlled. In particular, when molasses having high moisture is used, the quality of coal briquettes is deteriorated.
  • the present invention provides a coal briquette to which bioplastics are applied and a method of manufacturing the same.
  • Method for producing coal briquettes according to an embodiment of the step of providing pulverized coal; Mixing starch powder acid-treated with pulverized coal to prepare a blended coal; Heat treating the blended coal; And forming the coal briquettes by molding the heat-treated blended coal.
  • the acid treated starch powder is a step of pulverizing the biomass, immersing the pulverized biomass in an aqueous acid solution to separate the filtrate containing starch, the separated filtrate to pH 3 to 5.5 Washing and drying the washed filtrate.
  • the acid treated starch powder may have a pH of 3 to 5.5 when dissolved in water at a concentration of 30% by volume.
  • the acid treated starch powder may have an average particle size of 0.01 to 1 country.
  • 1 to 10 parts by weight of the acidified starch powder may be added to 100 parts by weight of pulverized coal.
  • Preparing the blended coal may be carried out at a temperature of 50 to 65 ° C.
  • the acid treated starch powder in the coal briquettes may be transformed into bioplastics by heat treatment.
  • the heat treatment step may include supplying steam to the coal blend.
  • the water in the steam may be supplied to 1 to 5 parts by weight based on 100 parts by weight of pulverized coal.
  • the temperature of the steam may be 120 to 300 ° C.
  • the temperature of the coal blend in the heat treatment step may be 60 to 200 ° C.
  • the method may further include drying the heat-treated coal blend.
  • the coal briquettes prepared may contain 1 to 10% by weight of bioplastics, 3 to 15% by weight of moisture and remainder coal, and the bioplastics may be comprised of 25 to 70% by weight of amylopectin and 30 to 75% by weight of amylose.
  • the apparatus for producing coal briquettes according to an embodiment of the present invention is charged into a dome portion of a molten gasifier in a molten gas manufacturing apparatus including a molten gasifier in which reduced iron is charged, and a reducing furnace connected to the molten gasifier and providing reduced iron.
  • An apparatus for producing coal briquettes to be heated comprising: pulverized coal supply bins; Acid treated starch powder feed bin; A mixer for receiving pulverized coal and acid treated starch powder from the pulverized coal feed bin and the acid treated starch powder feed bin and mixing them to produce a blended coal; A kneader for receiving heat from the blended coal from a mixer; And a molding machine which receives the mixed coal heat-treated from the kneader and performs molding.
  • the mixer and the kneader may further include a preheating mixer to mix while preheating the coal mixture at a temperature of 50 to 65 ° C.
  • the kneader is connected to a steam supply pipe, and receives steam from the steam supply pipe to heat-treat the coal briquettes.
  • Between the kneader and the molding machine may further include a dryer for drying the heat-treated coal coal.
  • Coal briquettes having excellent strength can be produced.
  • FIG. 1 is a schematic flowchart of a method of manufacturing coal briquettes according to an exemplary embodiment of the present invention.
  • FIG. 2 is a view schematically showing an apparatus for manufacturing coal briquettes according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an apparatus for manufacturing molten iron using the coal briquettes manufactured in FIG. 1.
  • FIG. 4 is a schematic diagram of another apparatus for manufacturing molten iron using the coal briquettes manufactured in FIG. 1.
  • UV spectrometer 5 is a result of ultraviolet spectrometer (UV spectrometer) of the remaining binder material after the coal was separated from the coal briquettes prepared in Examples and Comparative Examples.
  • first, second, and crab 3 are used to describe various parts, components, regions, and 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 invention.
  • FIG. 1 schematically shows a flowchart of a method of manufacturing coal briquettes according to the present invention and an embodiment.
  • the flowchart of the manufacturing method of the coal briquettes of FIG. 1 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 producing coal briquettes includes the steps of providing pulverized coal (S10), mixing starch powder acid-treated with pulverized coal to prepare coal briquettes (S20), and heat treating the coal briquettes (S30). ) And forming the coal briquettes by molding the heat-treated mixed coal (S40).
  • the manufacturing method may further comprise other steps.
  • step S10 pulverized coal is provided.
  • pulverized coal is crushed coal, and in general, coal has a weak carbon content depending on the degree of carbonization.
  • the particle size of pulverized coal is constant.
  • the particle size of 3mm or less is 80wt or more and the particle size is 5 ⁇ . Pulverized coal having a particle size distribution of 90 wt% or less can be used.
  • the mixed coal is prepared by mixing the starch powder treated with fine coal in the step (S20).
  • an acid-treated starch powder that is a raw material of bioplastics is blended and described later (S30).
  • bioplastics By synthesizing bioplastics in the back, it serves as a coal briquette binder.
  • the bioplastics are already mixed with pulverized coal, it is not smooth to apply them to the surface of the pulverized coal, and the process of remelting the bioplastic at high temperature is required.
  • the re-melted bioplastics have low elastic recovery force and thus have low instantaneous strength of the coal briquettes manufactured.
  • to prepare a blended coal containing the acid-treated starch powder as a raw material by synthesizing the bio-plastic in the step (S30) and the like to be described later, smoothly applied to the surface of the pulverized coal, It is possible to improve the strength immediately of the produced coal briquettes.
  • Starch is 20 to 30% by weight amylose and 70 to 80% by weight amylo pectin? It consists of 3 ⁇ 4.
  • Amylose has a linear Helix (ix) structure and is elastic and can be applied to the medium effectively. It is also very effective as a binder because it is applied at a high density.
  • Amylo pectin however, has a branched structure that is hard to apply to the material to be bound.
  • the branch structure since the branch structure has a lower density than the linear structure, the strength of the binder portion after binding is weak, so that the branch structure is susceptible to deformation due to external pressure. Viscoelastic ability is weak.
  • starch is synthesized into bioplastics in step S30 and the like, and the beneficial amylose structure is increased as a binder, and the amylopectin structure is reduced, thereby improving the cold.strength and hot strength of the coal briquettes.
  • the acid-treated powdered starch is a step of pulverizing the biomass, immersing the pulverized biomass in an aqueous acid solution to separate the filtrate containing starch, washing the separated filtrate to pH 3 to 5.5 And drying the washed filtrate.
  • the biomass may include one or more selected from the group consisting of cassava, corn, wheat, rice, barley and potatoes. Specifically, corn may be used.
  • corn If corn is used, it is immersed using 0.2-0.5% by volume sulfurous acid solution. When soaked, it swells slowly as it is absorbed and becomes saturated when the water reaches 40% by weight. As it becomes saturated, the soluble substance in the raw material begins to elute in the immersion liquid, and the lactic acid bacteria develop and the eluted sugar is fermented into lactic acid. Fermented lactic acid and sulfurous acid decompose the protein, which leads to softening of the starch and protein bonds, thereby facilitating the separation of starch. Corn immersed in the sulfurous acid solution is crushed using a crusher. Sending to the crushed article ssinun separation "is separation of starch.
  • a rotary filter using a centrifuge can be used, and the separated starch filtrate is sent to the next step.
  • the filtrate is washed to pH 3 to 5.5.
  • the drying is to include less than 15% by weight of moisture. This will result in the presence of sulfuric acid and lactic acid in some corn starch powder.
  • Sulfuric acid may contain 0.01% by weight or more
  • lactic acid may contain 0.01% by weight or more. That is, the acid treated starch powder may contain 0.01 to 1% by weight of sulfuric acid and 0.01 to 1% by weight of lactic acid.
  • the process for preparing acid-treated starch is general Compared to the process for preparing starch, rather simple, there is an advantage in the manufacturing process.
  • Acid treated starch powder should have a pH of 3 to 5.5 when dissolved in water at a concentration of 30% by volume. If the pH is too high, problems may arise in which it is difficult to adequately obtain the viscoelasticity of the bioplastics. If the pH of the binder compound is too low, the viscoelasticity of the bioplastics may be lowered and the equipment may be corroded. Therefore, pH can be adjusted in the above-described range. More specifically, the acid treated starch powder may have a pH of 4-5 when dissolved in water at a concentration of 30% by volume.
  • the acid treated starch powder may have an average particle size of 0.01 to 1 mm 3. If the average particle size of the acid-treated starch powder is too small, the acid-treated starch powder may be agglomerated, and may not be smoothly mixed with the pulverized coal. If the average particle size of the acid treated starch powder is too large, the mixing with the pulverized coal may not be smooth. Therefore, the average particle size of the starch powder acid-treated in the above-described range can be adjusted.
  • the addition amount of the acid-treated starch powder may add 1 to 10 parts by weight of the acid-treated starch powder with respect to 100 parts by weight of pulverized coal. If the amount of acid treated starch powder is added too much, it may be difficult to uniformly mix the acid treated starch powder with the pulverized coal. If too little acid treated starch powder is added, the binding effect may be negligible. Therefore, the addition amount of the acid-treated starch powder can be adjusted to the above-mentioned range. More specifically, 2 to 8 parts by weight of the acidified starch powder may be added to 100 parts by weight of pulverized coal. Step (S20) may be carried out at a temperature of 50 to 65 ° C.
  • step (S30) If the temperature is too low, it may take a long time to increase the temperature to the appropriate heat treatment temperature in step (S30) to be described later. If the temperature is too high, the acid-treated starch powder that is not closely mixed with pulverized coal may be transformed into bioplastic in step S30 to be described later.
  • step S30 the coal briquettes are heat-treated.
  • step S30 the acid treated starch powder in the coal briquettes is transformed into bioplastics by heat treatment. Describe the mechanism by which acid-treated starch powder is transformed into bioplastics.
  • Amylose and amylo pectin present in starch have a crystalline structure.
  • Amylose is linear and amylopectin is a structure with branches in the amylose structure. If you add heat and add water, the water will penetrate inside the crystal. At room temperature, water is difficult to penetrate between crystals. The water penetrated between the crystals combines amylose and amylo pectin with hydrogen bonding.
  • Amylo pectin is branched by acid to form amylose. When water penetrates into amylose crystals, hydrogen bonding occurs, and hydrophilic group hydrophilic group interaction causes hydrophilic group 0H to go out and hydrophobic group OC bond to inward, transforming to Helix structure.
  • amylo pectin is converted to amylose.
  • Amylose is composed of glucose (alpha 1, 4-bonding).
  • Amylo pectin is composed of 1, 4-bonding of main backbone, and its branched part is connected to skeletal structure through alpha 1, 6-bonding.
  • the step of heat treatment in step (S30) may include supplying steam to the coal blend.
  • steam By supplying steam, it is possible to supply the moisture and heat required for bioplastic synthesis.
  • the acid required for bioplastic synthesis is supplied in the form of an acid-treated powder rather than an aqueous solution, a large amount of moisture is not unnecessarily supplied. As a result, the moisture content in the coal briquettes is reduced, thereby improving the strength of the coal briquettes and reducing unnecessary drying steps.
  • the water in the steam may be supplied to 1 to 5 parts by weight based on 100 parts by weight of pulverized coal. If too little water is supplied, bioplastic synthesis may not be performed smoothly.
  • the temperature of the steam may be 120 to 300 ° C.
  • step (S30) Due to the heat treatment in step (S30), the temperature of the coal blend is raised to 60 to 200 ° C. When the temperature of the coal blend does not rise properly, the synthesis of bioplastics may not be performed smoothly.
  • the method may further include drying the heat-treated coal blend.
  • the coal briquettes may be dried for 3 to 10 minutes at a temperature of 50 to 200 ° C.
  • the water present in the coal briquettes can be adjusted to include 3 to 15% by weight of water relative to 100% by weight of coal briquettes. More specifically, it can be adjusted to include 5 to 9% by weight. It is possible to improve the strength of coal briquettes in the aforementioned range.
  • Such moisture may be derived from moisture present in the pulverized coal in step S10, moisture present in the starch powder acid treated in step S20 and moisture present in steam in step S30.
  • coal briquettes are heat-treated to form coal briquettes.
  • coal briquettes may be manufactured in the form of pockets or strips by charging coal briquettes between pairs rotating in opposite directions. As a result, coal briquettes having excellent hot strength and cold strength can be produced.
  • Coal briquettes produced by the above manufacturing method comprises 1 to 10% by weight of bioplastics, 3 to 15% by weight of water and the balance of coal, and bioplastics include 25 to 70% by weight of amylopectin and 30 to 75% by weight of amylose. Is done.
  • the coal briquettes may include 3 to 7 wt% of bioplastics, 5 to 9 wt% of moisture, and balance coal.
  • Coal briquettes according to an embodiment of the present invention have excellent strength due to the viscoelasticity of bioplastics.
  • FIG. 2 schematically shows a coal briquette manufacturing apparatus to which the method of manufacturing coal briquettes illustrated in FIG. 1 is applied.
  • the structure of the coal briquette manufacturing apparatus of FIG. 2 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the coal briquette manufacturing apparatus of FIG. 2 may be modified in various forms.
  • the coal briquette manufacturing apparatus 100 includes a pulverized coal supply bin 10, an acid treated starch powder supply bin 20, a pulverized coal supply bin 10, and an acid treated starch powder supply bin 20. Powdered coal and acid-treated starch powders supplied from the mixture and mixed to produce blended coal; A kneader 50 which receives a blended coal from a mixer and heat-treats it; And a molding machine 70 which receives the mixed coal heat-treated from the kneader 50 and shapes the same.
  • the coal briquette manufacturing apparatus 100 supplies the pulverized coal supply bin 10 and the acid treated starch powder supply bin 20, and the bins 1 and 20 supply the pulverized coal and the acid treated starch powder.
  • Pulverized coal and acid treated starch powder have been described above, and thus redundant description will be omitted.
  • Pulverized coal and acid treated starch powder are supplied to the mixer 30.
  • the mixer 30 receives pulverized coal and acid treated starch powder from the pulverized coal supply bin 10 and the acid treated starch powder supply bin 20, and mixes them to produce a coal blend.
  • the mixer 30 is connected to the preheat mixer 40, and can be mixed while preheating the coal briquettes at a temperature of 50 to 65 ° C.
  • the presence of the preheat mixer 40 allows the heat treatment of the coal briquettes to be rapidly performed in the kneader 50 to be described later.
  • the preheat mixer 40 may supply steam for heat treatment.
  • the kneader 50 receives heat-mixed coal from the mixer 30 or the preheating mixer 40. Acid treated starch powder due to heat treatment in kneader 50 Transformed into plastic. Since the bioplastics have been described above, overlapping descriptions will be omitted.
  • the kneader 50 is connected to a steam supply pipe 51, and receives steam from the steam supply pipe 51 to heat-treat the coal blend.
  • the steam supply pipe 51 may be provided in plural along the vertical direction of the kneader 50.
  • the plurality of installed steam supply pipes 51 may supply steam at different temperatures or different amounts of steam depending on the installation position. For example, it may be configured to supply a high temperature of the steam toward the bottom along the vertical direction, or may be configured to supply a large amount of steam toward the bottom.
  • the acid since the acid is supplied in the form of acid-treated starch powder rather than in the form of an acid aqueous solution, unnecessary moisture in the coal blend is reduced, and energy for heat treatment in the kneader 50 is reduced.
  • the acid when supplied in the form of an aqueous acid solution, the content of water in the acid aqueous solution increases, so that an additional energy supply for converting the water in the aqueous acid solution into the vapor form in the kneader is required.
  • the temperature rise for heat treatment in the kneader 50 is not made quickly. As a result, the incision reaction for bioplastic transformation does not occur effectively.
  • the rear end of the kneader 50 may be connected to a dryer 60 for drying the heat-treated coal coal.
  • Dryer 60 may dry the heat treated coal blend at a temperature of 50 to 200 ° C for 3 to 10 minutes.
  • the dryer 60 may inject hot air above 70 ° C. and install a vent so that all the moisture evaporates immediately. ⁇
  • the molding machine 70 receives the blended coal heat-treated from the kneader 50 and shapes it.
  • the molding machine 70 may charge the coal briquettes between the twin rolls rotating in opposite directions to form the coal briquettes in the form of pockets or strips.
  • Molding machine 70 can be operated above -5 ° C. More specifically, at room temperature Can work.
  • Figure 3 uses the coal briquettes prepared in Figure 1 ;
  • the molten iron manufacturing apparatus 200 is shown schematically.
  • the structure of the apparatus for manufacturing molten iron 200 of FIG. 3 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. 3 may be modified in various forms.
  • the molten iron manufacturing apparatus 200 of FIG. 3 includes a melt gasifier 110 and a reduction furnace 120. In addition, other devices may be included as needed. Iron ore is charged into the reduction furnace 120 to be reduced. Iron ore charged in the reduction furnace 120 is made of reduced iron while passing through the reduction furnace 120 after being pre-dried. Reduction furnace 120 is a layered layer type reduction furnace, receives a reducing gas from the melt gasifier 110 to form a layered layer therein.
  • coal briquettes manufactured by the manufacturing method of FIG. 1 are charged into the molten gasifier 110, a coal seam layer is formed inside the molten gasifier 110.
  • the dome part 101 is formed in the upper part of the melt gasifier 110. That is, a wider space is formed than the other parts of the melt gasification furnace 110, where there is a high temperature reducing gas. Therefore, coal briquettes charged into the dome portion 101 by the reducing silver gas can be easily differentiated.
  • the coal briquettes manufactured by the method of FIG. 1 use bioplastic as a binder, the coal briquettes have high hot strength, do not differentiate in the dome portion of the melt gasifier 110, and fall to the lower portion of the melt gasifier 110.
  • the heat generated by the pyrolysis reaction of the coal briquettes moves to the lower part of the melt gasification furnace 110 to react with the exothermic reaction with oxygen supplied through the tuyere 130.
  • the coal briquettes can be used as a heat source for keeping the melt gasifier 110 at a high temperature.
  • a large amount of gas generated in the lower portion of the melt gasifier 110 and the reduced iron supplied from the reducing furnace 120 can pass through the coal seam layer in the melt gasifier 110 more easily and uniformly. have.
  • a bulk coal material or coke may be charged into the melt gasifier 110 as necessary.
  • An air vent 130 is installed on the outer wall of the melt gasifier 110 to blow oxygen. Oxygen is blown into the coal packed bed to form a combustion zone. The coal briquettes are burned in the combustion zone to generate reducing gas. Can be.
  • FIG. 4 schematically shows an apparatus for manufacturing molten iron 300 using the coal briquettes manufactured in FIG. 1.
  • the structure of the apparatus for manufacturing molten iron 300 of FIG. 4 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the apparatus for manufacturing molten iron 300 of FIG. 4 may be modified in various shapes. Since the structure of the apparatus for manufacturing molten iron 300 of FIG. 3 is similar to that of the apparatus for manufacturing molten iron 200 of FIG. 3, the same reference numerals are used for the same parts, and a detailed description thereof will be omitted.
  • the molten iron manufacturing apparatus 300 includes a molten gasifier 110, a reducing furnace 122, a reduced iron compression device 140, and a reduced reduced iron storage tank 150. (150) may be omitted.
  • the produced coal briquettes are charged into a melt gasifier 110.
  • the coal briquettes generate a reducing gas in the melt gasifier 110 and the generated reducing gas is supplied to a fluidized bed reducing furnace.
  • the iron ore is supplied to the plurality of reducing furnaces 122 having a fluidized bed, and is made of reduced iron while flowing by the reducing gas supplied from the melt gasifier 110 to the reducing furnaces 122.
  • the reduced iron is compressed by the reduced iron compression device 140 and then stored in the reduced reduced iron storage tank 150.
  • the compressed reduced iron is supplied from the compressed reduced iron storage tank 150 to the melt gasifier 110 and melted in the melt gasifier 110.
  • 100 parts by weight of coal having an average property and having a particle size of 90% or more of 3 kPa or less was prepared from pulverized coal (water content of 10wt% or less).
  • Starch is prepared from corn flour, which is acid-treated in the manufacturing process.
  • the coal briquettes were prepared by mixing 4 parts by weight of starch powder (pH 4 when dissolved in water with 30 vol 3 ⁇ 4>).
  • the coal blend was transferred to a preheat mixer, and the steam was blown into the preheat mixer to preheat and mix to 50 ° C. or higher. This was added to the kneader again to adjust the temperature inside the kneader to 90 ° C or more. At this time, the amount of water supplied in the steam was 2 parts by weight, and the kneader residence time was 15 minutes.
  • the mixed coal discharged from the kneader was kept in the dryer Gravi ty Feeder for 3 to 5 minutes, blown with hot air at 120 ° C, and proceeded with Suct ion.
  • the coal briquettes were compressed into a press to produce briquette-shaped briquettes having a size of 64.5 mm ⁇ 25.4 mm ⁇ 19.1 mm.
  • the compressive strength and the drop strength of the coal briquettes were measured by the following evaluation method and summarized in Table 1 below.
  • the amount of water supplied in the steam was prepared in the same manner as in Experiment 1 except that it was adjusted to 4 parts by weight.
  • Kneader residence time was adjusted to 5 minutes, and was prepared in the same manner as in Experiment 1 except that the amount of water supply in the steam was adjusted to 3 parts by weight.
  • Kneader residence time was adjusted to 10 minutes, and was prepared in the same manner as in Experiment 1 except that the amount of water supply in the steam was adjusted to 3 parts by weight.
  • Kneader residence time was adjusted to 20 minutes, and was prepared in the same manner as in Experiment 1 except that the amount of water supply in the steam was adjusted to 3 parts by weight. Comparative example
  • 100 parts by weight of coal having an average property and having a particle size of 3 kPa or less was prepared from pulverized coal.
  • the coal briquettes were prepared by adding 5 parts by weight of 5% by weight aqueous acetic acid solution and 4 parts by weight of starch to the fine coal.
  • the prepared coal briquettes were put into a kneader and heat-treated, and compressed into a press to prepare briquette-shaped coal briquettes having a size of 64.5 mm X 25.4 mm X 19. 1 mm.
  • the compressive strength and the drop strength of the coal briquettes were measured by the following evaluation method and summarized in Table 1 below.
  • the weight ratio of the coal briquettes prepared in Experimental Examples 1 to 7 and the comparative example was dropped four times at a height of 5 m from the ground to maintain a shape with a particle size of 10 mm 3 or more as a percentage of the weight of the whole coal briquettes.
  • Coal briquette manufacturing apparatus 110 Melt gasification furnace 120, 122. Reduction furnace
  • Reduced iron compression device 150 Compressed reduced iron storage tank 200, 300.

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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)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Manufacture Of Iron (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une briquette, qui doit être chargée dans une partie de dôme d'un four de gazéification par fusion et être rapidement chauffée dans un appareil de fabrication de fer fondu, l'appareil comprenant : un four de gazéification par fusion dans lequel du fer réduit est chargé et un four de réduction relié au four de gazéification par fusion et produisant du fer réduit. Selon un mode de réalisation de la présente invention, le procédé de fabrication d'une briquette comprend les étapes consistant à : fournir du charbon pulvérisé ; fabriquer du charbon mixte par mélange d'une poudre d'amidon traité à l'acide avec le charbon pulvérisé ; traiter à la chaleur le charbon mixte ; et fabriquer une briquette par moulage du charbon mixte traité à la chaleur.
PCT/KR2017/010251 2016-10-12 2017-09-19 Procédé de fabrication de briquette et appareil de fabrication de briquette Ceased WO2018070681A1 (fr)

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CN201780063205.6A CN109804052A (zh) 2016-10-12 2017-09-19 型煤制备方法及型煤制备装置
EP17860281.9A EP3527646A4 (fr) 2016-10-12 2017-09-19 Procédé de fabrication de briquette et appareil de fabrication de briquette

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KR102104556B1 (ko) * 2018-08-10 2020-04-24 주식회사 포스코 성형탄 제조 방법 및 제조 장치
KR102311318B1 (ko) * 2019-11-07 2021-10-08 주식회사 포스코 성형탄, 및 이의 제조 방법
JP7415964B2 (ja) * 2021-01-21 2024-01-17 Ｊｆｅスチール株式会社 ブリケットの製造方法

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KR101827997B1 (ko) 2018-02-13
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CN109804052A (zh) 2019-05-24
EP3527646A4 (fr) 2019-10-23

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