WO2011065303A1 - Procédé de production de coke de résistance élevée - Google Patents

Procédé de production de coke de résistance élevée Download PDF

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Publication number
WO2011065303A1
WO2011065303A1 PCT/JP2010/070680 JP2010070680W WO2011065303A1 WO 2011065303 A1 WO2011065303 A1 WO 2011065303A1 JP 2010070680 W JP2010070680 W JP 2010070680W WO 2011065303 A1 WO2011065303 A1 WO 2011065303A1
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Prior art keywords
mass
mixture
less
caking filler
raw coal
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PCT/JP2010/070680
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English (en)
Japanese (ja)
Inventor
厚 土橋
里美 宮脇
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新日本製鐵株式会社
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Application filed by 新日本製鐵株式会社 filed Critical 新日本製鐵株式会社
Priority to BR112012012115A priority Critical patent/BR112012012115B1/pt
Priority to CN201080052844.0A priority patent/CN102666789B/zh
Priority to JP2011511554A priority patent/JP4819197B2/ja
Priority to KR1020127014163A priority patent/KR101430841B1/ko
Publication of WO2011065303A1 publication Critical patent/WO2011065303A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
    • C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying

Definitions

  • the present invention relates to a method for producing high-strength coke, particularly high-strength coke for blast furnaces.
  • Coke used as a reducing material in blast furnace operation is required to have the required strength in order to ensure air permeability in the furnace.
  • good quality caking coal is required as a raw material for coke.
  • high-quality strong caking coal is in a resource-depleted state.
  • caking filler that is liquid at room temperature, such as tar, is preferably kneaded uniformly into the raw coal.
  • the caking filler solid at room temperature such as pitch is liquefied by heating to the melting point or higher and kneaded into raw coal (for example, see Patent Document 3).
  • the liquid caking filler material may cause operational troubles such as clogging of pipes and adhesion to the kneading machine, and has a difficulty in handling.
  • the solid caking filler requires a heating device for liquefaction, and has the disadvantages that equipment costs and operating costs are added, and manufacturing costs increase.
  • Patent Document 4 a method for producing coke has been proposed in which a solid caking filler is mixed with raw coal after being pulverized (see Patent Documents 4 and 5). More specifically, for example, in Patent Document 4, a solid caking filler containing 50% or more of fine particles having a particle size of less than 3 mm is mixed in raw coal and charged into a coke oven as it is. A method for producing high strength coke to dry distillation is described. According to the method described in Patent Document 4, since the solid caking filler is uniformly dispersed in the coal particles, a strong coke structure can be obtained. Further, Patent Document 4 describes that in the particle size constitution of the solid caking filler, fine particles having a particle size of 0.3 mm or less are likely to aggregate, and therefore it is preferable that the number is as small as possible.
  • Patent Documents As a blended coal for a coke oven, a method for producing coke for a blast furnace using a mixture of a low-grade blended coal whose moisture has been dried to 5% or less and a hydrocarbon bitumen has been proposed (for example, Patent Documents). 6). According to the method described in Patent Document 6, since the bulk density of the charged coal is large, a strong coke structure can be obtained.
  • fine particles having a particle size of 0.3 mm or less are generated during pulverization.
  • fine powder particles having a particle size of 0.3 mm or less tend to aggregate.
  • Pseudo particles formed by agglomeration of fine particles of solid caking filler with a particle size of 0.3 mm or less are not easily disintegrated even when mixed with raw coal, and while mixed with raw coal It may grow and reduce the dispersibility of the solid caking filler in the raw coal.
  • a solid caking filler containing coking charcoal containing a large amount of low-quality coking coal (non-caking coal or non-caking caking coal) and fine powder particles having a particle size of 0.3 mm or less In some cases, coke having a sufficient strength cannot be obtained. Therefore, conventionally, when solid caking filler is pulverized and used, it is pulverized so that fine particles with a particle size of 0.3 mm or less are not generated as much as possible, or even if generated, the fine particles are not used as much as possible. It was.
  • a solid containing the raw coal and fine powder particles having a particle size of 0.3 mm or less is used. It aims at providing the manufacturing method of the high intensity
  • the present inventors have studied as follows. That is, the present inventors pay attention to the dispersibility of the pulverized caking filler in coking coal and the strength of coke, and pulverize the solid caking filler to include fine particles having a particle size of 0.3 mm or less.
  • the pulverized caking filler is mixed with a low-quality raw coal containing non-caking coal or non-caking caking coal, and the water content of the mixture is obtained. The content of fine particles of 3 mm or less was optimized.
  • the solid caking filler is pulverized into a pulverized caking filler containing fine particles having a particle size of 0.3 mm or less, and this is mixed with raw coal to obtain a mixture, the water content of the mixture and The dispersibility of the pulverized caking filler in the raw coal, in which the content of fine particles having a particle size of 0.3 mm or less that forms aggregated pseudo particles contained in the pulverized caking filler determines the coke strength. It was found to have a big effect on Moreover, it turned out that coke strength improves, so that there is much content of fine powder particle
  • the water content of the mixture is 8 mass% or less.
  • the pulverized caking filler containing fine powder particles having a particle size of 0.3 mm or less is mixed with the raw material charcoal to form a mixture, the water content of the mixture is 7 mass% or less.
  • the drying step is performed simultaneously with the mixing step, in this drying step, the pulverized caking filler and the raw coal are dried while being mixed, so that the water content is 0% by mass or more and 8% by mass.
  • Forming the mixture which is: In the case where the drying step is performed after the mixing step and before the carbonization step, in this drying step, the mixture is dried so that the water content of the mixture is 0% by mass or more and 8% by mass or less. To produce high strength coke.
  • the drying step is performed simultaneously with the mixing step, in this drying step, the pulverized caking filler and the raw coal are dried while being mixed, and the water content is 0% by mass or more and 7% by mass or less. Forming said mixture which is In the case where the drying step is performed after the mixing step and before the carbonization step, in this drying step, the mixture is dried so that the water content of the mixture is 0% by mass or more and 7% by mass or less. To produce high strength coke.
  • the fine powder particles of the solid caking filler having a particle size of 0.3 mm or less formed by crushing the solid caking filler are crushed caking filler and raw coal to the coke oven used in the transportation or dry distillation process. Generates dust when charging the mixture.
  • the smoke generation (dust generation) phenomenon is a phenomenon in which fine particles contained in the solid caking filler material soar into the air like smoke. The dust generation of the solid caking filler material pollutes the production environment. For this reason, the present inventors paid attention to the smoke generation (dust generation) phenomenon.
  • the solid caking filler material after grinding or the caking caking powder can be used as a method for preventing dust generation in environmental management.
  • a method for preventing dust generation by adding water to the mixture of the filler and raw coal is conceivable.
  • the present inventors paid attention to the generation of fine powder particles having a particle size of 0.3 mm or less of the solid caking filler, and pulverized caking filler and raw coal obtained by crushing the solid caking filler.
  • the mixture obtained by drying the mixture, the mixture obtained by mixing the crushed caking filler and the dried raw coal, while mixing the crushed caking filler and the raw coal The moisture content contained in the dried mixture obtained by drying was optimized. As a result, the inventors have found that the dust content of the fine particles can be prevented by setting the water content of the mixture to 6% by mass or more.
  • moisture is added so that the water content of the mixture is 6% by mass or more after the drying step and before the carbonization step. You may further provide the moisture adjustment process to add.
  • a pulverized caking filler containing 80% by mass or more of particles having a particle size of 3 mm or less may be formed in the pulverization step.
  • the raw coal is 20% by mass or more and 60% by mass of one or both of non-slightly caking coal and non-caking coal. % Or less may be included.
  • the particle diameter is 0.3 mm in the raw coal.
  • the pulverized caking filler having the following fine particles can be uniformly dispersed and the bulk density of the mixture of the pulverized caking filler and raw coal can be improved, so that high strength coke can be produced. .
  • Examples 1-1 to 1-18, 2-1 to 2-6, Comparative Examples 1-1 to 1-5, 2-1 to 2-3, 3-1 to 3-9, 4-1 to 4- 5 is a graph showing the relationship between the smoke generation time of 5 and the water content of the mixture.
  • the present inventors uniformly disperse pulverized caking filler, which is a solid caking filler containing solid powder containing fine powder (fine particles having a particle size of 0.3 mm or less) forming pseudo particles, in raw coal. If it can be mixed, it is possible to utilize fine particles having a particle size of 0.3 mm or less, which has not been utilized in the past, and based on the idea that coke strength can be further increased, a particle size of 0.3 mm We have intensively studied a method for uniformly mixing solid caking filler containing the following fine particles with raw coal.
  • the present inventors have intensively investigated the properties of pseudo particles formed by the fine particles of the solid caking filler. As a result, the following (x) to (z) were found.
  • (X) A thin film of water is formed on the surface of the fine particles of the solid caking filler. This thin film of water functions to reinforce the cohesive bond between the fine particles, and pseudo particles that do not easily collapse are formed.
  • the present inventors pulverize the solid caking filler mixed with raw coal by changing the pulverization conditions with a pulverizer, and contain fine particles having a particle size of 3 mm or less contained in the solid caking filler after pulverization.
  • the amount (% by mass) and the content (% by mass) of fine particles having a particle size of 0.3 mm or less were measured.
  • the content of fine particles of 0.3 mm or less is 30% by mass or more
  • the content of fine particles of 3 mm or less is 80% by mass or more and 3 mm or less.
  • the amount of change in the content of fine particles was small.
  • the content of fine particles of 0.3 mm or less showed a large change in content even in the region where the content of fine particles of 3 mm or less was 80% by mass or more.
  • the present inventors determined the content (% by mass) of the fine particles of the solid caking filler having a particle size of 0.3 mm or less as the properties of the crushed solid caking filler (crushed caking filler). That is, it was adopted as an index for evaluating the ability to form pseudo particles (characteristic index of solid caking filler).
  • the inventors pulverize the solid caking filler to obtain a crushed caking filler containing fine particles of 0.3 mm or less, and mix 2% by mass of the pulverized caking filler with the raw coal to form a mixture.
  • the mixture is dried with a dryer to obtain a dry mixture having a water content of 7% by mass, and the dry mixture is subjected to dry distillation to produce coke, and a property index of the solid caking filler (particle size of the solid caking filler)
  • the relationship between the content of fine particles of 0.3 mm or less) and the coke quality index was investigated.
  • a quality index of coke a weight ratio (hereinafter referred to as DI (15)) of 150 mm or more by a rotation strength test drum method defined in JIS K 2151 was used.
  • a fine powder that aggregates to form pseudo particles specifically, a particle size of 0.01 mm or more and 0 contained in a pulverized caking filler formed by pulverizing a solid caking filler.
  • FIG. 1 is a flowchart for explaining a high-strength coke manufacturing method according to the first embodiment, which is an example of the high-strength coke manufacturing method of the present invention.
  • strength coke of 1st Embodiment is equipped with grinding
  • the solid caking filler material x is pulverized to contain fine particles having a particle size of 0.01 mm or more and 0.3 mm or less in an amount of 50% by mass or more and 100% by mass or less.
  • This is a process for forming a binding filler.
  • the pulverized caking filler is a crushed caking filler x that is crushed (solid).
  • the fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler are 50% by mass or more.
  • the pulverized caking filler can be more uniformly dispersed in the raw coal, and the strength of the coke is increased. Can be improved.
  • fine particles having a particle size of 0.3 mm or less contained in the pulverized caking filler are preferable because the finer the particle size, the better the strength of the coke can be improved.
  • the particle size is set to 0.01 mm or more so that it is possible.
  • the particle size of fine particles having a particle size of 0.3 mm or less contained in the pulverized caking filler is made fine, the mixture of the pulverized caking filler and raw coal to the coke oven used during transportation or in the dry distillation process In order to easily generate dust during charging, the particle size is preferably 0.1 mm or more.
  • a pulverized caking filler containing 80% by mass or more of particles having a particle size of 3 mm or less in order to more uniformly disperse the pulverized caking filler in the raw coal, it is preferable to use a pulverized caking filler containing 80% by mass or more of particles having a particle size of 3 mm or less.
  • the solid caking filler x petroleum-based pitches or coal-based pitches that can be obtained in large quantities can be used, and those having a softening point of 180 ° C. or lower are preferably used, and those having a temperature of 140 ° C. or lower are used. Is preferred.
  • the raw coal pulverization step S2 includes 75% by mass or more of particles having a particle size of 3 mm or less by pulverizing the raw coal y before the mixing step S3, and a particle size of 0.01 mm or more and In this step, fine powder particles of 0.3 mm or less are contained in an amount of 0% by mass or more and 30% by mass or less.
  • the fine particles of the raw coal y are preferably not more than 0.3 mm in size, and it is possible to efficiently divide the particle size using a sieve. It is preferable that the particle size be 0.01 mm or more so that it is possible.
  • the fine powder particles in the above particle diameter range are contained in the raw coal y, so that the pulverized caking filler can be more uniformly dispersed in the raw coal, but it is preferably used during transportation or in the dry distillation step. Since it becomes easy to generate dust at the time of charging the mixture of the pulverized caking filler and raw coal into the coke oven, the content of fine particles in the above-mentioned grain range in the raw coal y is preferably 30% by mass or less.
  • the pulverized caking filler can be more uniformly dispersed in the raw coal by performing the raw coal pulverization step S2.
  • the raw coal pulverization step S2 in order to more uniformly disperse the crushed caking filler in the raw coal, the raw coal y is pulverized to contain 100% by mass of particles having a particle size of 3 mm or less. It is more preferable.
  • the raw coal y contains 20% by mass or more and 60% by mass or less of one or both of non-slightly caking coal and non-caking coal.
  • the content of one or both of the non-caking coal and the non-caking coal contained in the raw coal y is 20% by mass or more, the usage amount of the strong caking coal used for the raw coal y is reduced. A sufficient effect is obtained.
  • the content of one or both of the non-slightly caking coal and the non-caking coal contained in the raw coal y exceeds 60% by mass, even if a caking filler is added (DI (15) ) It becomes difficult to ensure the strength of coke of 85 or more.
  • the mixing step S3 was pulverized in the pulverized caking filler and raw material coal pulverizing step S2, which is a solid caking filler as a solid containing fine powder particles having a particle size of 0.3 mm or less that aggregate to form pseudo particles.
  • This is a step of mixing raw coal with a mixture.
  • the mixing ratio of the pulverized caking filler and the raw coal is not particularly limited, but the raw coal y containing 20% by mass or more and 60% by mass or less of one or both of non-slightly caking coal and non-caking coal is included.
  • DI (15) in order to ensure a coke strength of 85 or more, the range of 0.5% by mass: 100% by mass (crushed caking filler: raw coal) to 5% by mass: 100% by mass It is preferable that
  • the drying step S4 is a step of drying the mixture using a dryer or the like to obtain a dry mixture having a water content of 0% by mass to 8% by mass.
  • the pseudo particles formed by agglomeration of fine particles having a particle size of 0.3 mm or less contained in the solid caking filler material are suitable for uniform mixing with the raw coal. It grows beyond the thickness (particle size), leading to coarsening of the pseudo particles and inconsistent sizes (particle sizes) of the pseudo particles. For this reason, it becomes difficult for the solid caking filler to be uniformly dispersed in the raw coal, and the strength of the coke is lowered or the variation in the strength of the coke is increased.
  • the moisture content of the dry mixture necessary to form pseudo particles of solid caking filler of a size (particle size) suitable for uniform mixing with raw coal is the type of solid caking filler and the property index It depends on the content of fine particles of 0.3 mm or less contained in the pulverized caking filler obtained by crushing the solid caking filler.
  • the moisture content of the dry mixture is preferably small and more preferably 7% by mass or less in order to disperse the pulverized caking filler further uniformly in the raw coal.
  • the moisture content of the dry mixture may be 0% by mass, but the time required for drying the mixture can be shortened, the drying step S4 can be performed efficiently, and at the time of transportation. Or it is preferable that it is 6 mass% or more so that the dust generation which generate
  • moisture content of the dry mixture is 6% by mass or more
  • moisture adjustment is performed so that the moisture content of the dry mixture becomes 6% by mass or more after the drying step S4 and before the dry distillation step S6. Even without performing step S5, dust generation can be sufficiently prevented. For this reason, compared with the case where moisture adjustment process S5 is performed, coke can be manufactured efficiently.
  • drying process S4 it is preferable to heat a mixture at the temperature below the softening point of a solid caking filler. This makes it possible to efficiently obtain a dry mixture by heating the mixture at a temperature at which the solid caking filler does not liquefy or melt.
  • the temperature at which the mixture is heated in the drying step S4 is more preferably 100 ° C. or lower.
  • the temperature which heats a mixture in drying process S4 is 50 degreeC or more.
  • the moisture adjustment step S5 is a step of adding moisture so that the moisture content of the dry mixture is 6% by mass or more after the drying step S4 and before the carbonization step S6. By performing moisture adjustment process S5, it can prevent that the fine powder particle
  • the moisture adjustment step S5 may not be performed when the moisture content of the dry mixture after the drying step S4 is 6% by mass or more, or when it is not necessary to prevent dust generation.
  • the moisture content of the dry mixture is 6% by mass or more
  • the pseudo particles formed by agglomeration of fine particles having a particle size of 0.3 mm or less contained in the solid caking filler do not collapse and do not generate dust.
  • the moisture content of the dry mixture is less than 6% by mass, the pseudo-particles of the solid caking filler material collapse and a large amount of fine particles are generated, resulting in a smoke generation (dust generation) phenomenon. Therefore, the moisture content of the dry mixture necessary to prevent dust generation of the solid caking filler fine particles by forming pseudo particles in which the solid caking filler fine powder particles do not collapse is 6% by mass or more. It is estimated to be.
  • the moisture adjustment step S5 is performed,
  • the water content is preferably 6% by mass or more.
  • Table 1 shows the result of measuring the particle size distribution of the dust collection dust of charging coal (mixture of solid caking filler and raw coal) having a water content of 5.3 mass%.
  • the dry distillation step S6 is a step of dry distillation of the dry mixture.
  • the dry distillation of the dry mixture can be performed using a coke oven. As shown in FIG. 1, coke z is obtained by performing dry distillation process S6.
  • the method for producing high-strength coke according to the present embodiment is obtained by crushing solid caking filler and containing fine particles having a particle size of 0.01 mm or more and 0.3 mm or less in an amount of 50% by mass or more and 100% by mass or less.
  • a pulverization step S1 as a filling material, a mixing step S3 for mixing a pulverized caking filler material and raw coal, and a dry distillation step S6 for dry distillation of the mixture and after the mixing step S3 and a dry distillation step Before S6 (between the mixing step S3 and the carbonization step S6), the method includes a drying step S4 in which the mixture is dried so that the water content of the mixture is 0% by mass or more and 8% by mass or less.
  • strength coke of this embodiment is equipped with the water
  • a pulverized caking filler containing fine powder particles having a particle size of 0.01 mm or more and 0.3 mm or less and 50 mass% or more and 100 mass% or less is mixed with raw coal to form a mixture
  • the water content of the mixture is 0% by mass or more and 8% by mass or less
  • 30% by mass of fine powder particles having a particle size of 0.01 mm or more and 0.3 mm or less are used.
  • the pulverized caking filler containing not less than 100% and not more than 100% by mass is mixed with raw coal to make a mixture, and the moisture content of the mixture is not less than 0% by mass and not more than 7% by mass will be described.
  • the content of the fine powder particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler and the water content of the mixture is the first.
  • the same method as the embodiment can be used.
  • the method for producing high-strength coke according to the present embodiment is obtained by crushing solid caking filler and containing fine particles having a particle size of 0.01 mm or more and 0.3 mm or less in an amount of 30% by mass or more and 100% by mass or less. It comprises a pulverization step for making a filling material, a mixing step for mixing the pulverized caking filler material and raw coal, and a dry distillation step for dry distillation of the mixture. After the mixing step and before the dry distillation step (mixing) Between the step and the carbonization step), the method includes a drying step in which the mixture is dried so that the water content of the mixture is 0% by mass or more and 7% by mass or less.
  • the fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler are 30% by mass or more in order to obtain coke having sufficient strength, In order to further improve the strength of the coke, it is preferably 40% by mass or more, and more preferably 50% by mass or more.
  • the content of fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler is 30% by mass or more and 100% by mass or less. If the water content exceeds 7% by mass, pseudo particles having a particle size suitable for mixing with the raw coal are not formed, and it becomes difficult to uniformly disperse the crushed caking filler in the raw coal, and the strength of the coke. May become insufficient.
  • the moisture content of the dry mixture is preferably small in order to more uniformly disperse the pulverized caking filler in the raw coal, and more preferably 6.5% by mass or less.
  • the moisture content of the dry mixture may be 0% by mass, but the time required for drying the mixture can be shortened, the drying process can be performed efficiently,
  • the amount is preferably 6% by mass or more so as to prevent dust generation when the dry mixture is charged into the coke oven.
  • a moisture adjustment step of adding moisture so that the moisture content of the dry mixture becomes 6% by mass or more after the drying step and before the dry distillation step. Even if not performed, dust generation can be sufficiently prevented. For this reason, compared with the case where a moisture adjustment process is performed, coke can be manufactured efficiently.
  • the content of fine powder particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler is 30% by mass or more and 100% by mass or less, but the mixture is dried.
  • the pulverized caking filler containing fine powder particles having a particle size of 0.3 mm or less can be uniformly dispersed in the raw coal. .
  • blended many non-caking coal and non-caking coal was used as raw coal similarly to 1st Embodiment mentioned above.
  • the pulverized caking filler having fine particles having a particle size of 0.3 mm or less can be uniformly dispersed in the raw coal, and the bulk density of the mixture of the pulverized caking filler and raw coal Therefore, high strength coke can be produced.
  • FIG. 2 is a flowchart for explaining the method for producing high-strength coke according to the third embodiment, which is an example of the method for producing high-strength coke according to the present invention.
  • drying process S4 was performed after mixing process S3 and before dry distillation process S6, as shown in FIG. 2, the high intensity
  • the drying step S41 is performed before the mixing step S31.
  • the method for producing high-strength coke pulverizes the solid caking filler material to produce fine particles having a particle size of 0.01 mm or more and 0.3 mm or less in an amount of 50% by mass or more.
  • a pulverizing and caking additive containing 100% by mass or less (or 30% by mass and 100% by mass or less), a raw coal pulverizing step S2, and a pulverizing caking additive and raw coal are mixed.
  • a mixing step S31 to be a mixture, a moisture adjusting step S5, and a carbonization step S6 for carbonizing the mixture.
  • the raw coal is dried, and the water content of the mixture in the mixing step is 0 mass. % Or more and 8% by mass or less (when fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler are 30% by mass or more and 100% by mass or less, 0% by mass or more And 7 mass% or less
  • the raw coal pulverized using a dryer or the like is dried, and the water content of the mixture in the mixing step S31 is 0% by mass or more and 8% by mass or less (crushed caking filler) In the case where the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less are contained in 30% by mass or more and 100% by mass or less, 0% by mass to 7% by mass) is there.
  • a target value in the range of the moisture content of the raw coal after the drying step S41 is calculated in advance, and the raw coal is dried so as to be the target value.
  • the target value of the moisture content of the raw coal after the drying step S41 can be calculated as follows. That is, using the moisture content of the crushed caking filler and the content of the crushed caking filler contained in the mixture, the moisture content of the raw coal in which the moisture content of the mixture in the mixing step is within the above range. Determine the range of quantities.
  • the moisture content of the raw coal after the drying step S41 may be 0% by mass, but the time required for drying the raw coal can be shortened, and the drying step S41 can be efficiently performed. It is preferable that the water content of the mixture is 6% by mass or more so that the generation of dust during transportation or charging of the dry mixture into the coke oven can be prevented. .
  • the moisture content of the dry mixture obtained by mixing the pulverized caking filler and the raw coal after the drying step S41 is 6% by mass or more, after the drying step S41 and the dry distillation step S6 Dust generation can be sufficiently prevented without performing the moisture adjustment step S5 in which moisture is added so that the moisture content of the dry mixture becomes 6% by mass or more before. For this reason, compared with the case where moisture adjustment process S5 is performed, coke can be manufactured efficiently.
  • the drying step S41 it is preferable to heat the raw coal. As a result, the raw coal can be efficiently dried.
  • the temperature at which the raw coal is heated is not particularly limited, but in the mixing step S31 performed after the drying step S41, the solid caking filler in contact with the raw coal is prevented from being liquefied and melted.
  • the temperature is preferably below the softening point of the caking filler.
  • the mixing step S31 is pulverized in the pulverized caking filler and raw material coal pulverizing step S2, which is a solid caking filler as a solid containing fine particles having a particle size of 0.3 mm or less that aggregate to form pseudo particles, This is a step of mixing the raw coal dried in the drying step S41 to form a mixture.
  • the content of fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler in the pulverization step S1 is 50% by mass or more and 100% by mass. % Or less (or 30% by mass or more and 100% by mass or less), and in the drying step S41, the water content of the mixture in the mixing step S31 is 0% by mass or more and 8% by mass or less (particles included in the crushed caking filler)
  • the fine particles having a diameter of 0.01 mm or more and 0.3 mm or less are 30% by mass or more and 100% by mass or less, they are set to 0% by mass or more and 7% by mass or less.
  • the raw material While being able to uniformly disperse the pulverized caking filler having fine particles having a particle size of 0.3 mm or less in the charcoal, it is possible to improve the bulk density of the mixture of the pulverized caking filler and raw coal, High strength coke can be produced.
  • FIG. 3 is a flowchart for explaining a high-strength coke manufacturing method according to the fourth embodiment, which is an example of the high-strength coke manufacturing method of the present invention.
  • drying process S4 was performed after mixing process S3 and before dry distillation process S6, as shown in FIG. 3, the high intensity
  • the drying step is performed simultaneously with the mixing step S32.
  • strength coke of this embodiment it can be set as the same method as 1st Embodiment or 2nd Embodiment except performing a drying process simultaneously with mixing process S32. That is, as shown in FIG. 3, the method for producing high-strength coke according to the present embodiment pulverizes the solid caking filler, and fine particles having a particle size of 0.01 mm or more and 0.3 mm or less are contained in an amount of 50% by mass or more.
  • a pulverizing and caking additive containing 100% by mass or less (or 30% by mass and 100% by mass or less), a raw coal pulverizing step S2, and a pulverizing caking additive and raw coal are mixed.
  • a mixing step S32 to be a mixture, a moisture adjustment step S5, and a carbonization step S6 for carbonizing the mixture.
  • the mixture is dried while mixing the pulverized caking filler and raw coal, and contains moisture.
  • the amount is 0% by mass or more and 8% by mass or less (when fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler are 30% by mass or more and 100% by mass or less, 0 mass% or more and 7 quality % Or less) is a method of performing a drying step to form a mixture which is. Therefore, in this embodiment, the mixing step S32 also serves as a drying step.
  • the drying step (mixing step S32) of the present embodiment is dried using a dryer or the like while mixing the pulverized caking filler and raw coal, and has a water content of 0% by mass or more and 8% by mass or less (When the fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler are 30% by mass or more and 100% by mass or less, 0% by mass or more and 7% by mass or less) It is a process of forming a mixture.
  • the content of fine particles having a particle size of 0.01 mm or more and 0.3 mm or less contained in the pulverized caking filler in the pulverization step S1 is 50% by mass or more and 100% by mass. % Or less (or 30% by mass or more and 100% by mass or less), and in the drying step (mixing step S32), the pulverized caking filler and the raw coal are dried while mixing, and the water content is 0% by mass or more.
  • the raw material While being able to uniformly disperse the pulverized caking filler having fine particles having a particle size of 0.3 mm or less in the charcoal, it is possible to improve the bulk density of the mixture of the pulverized caking filler and raw coal, High strength coke can be produced.
  • the conditions of the examples are one example of conditions adopted for confirming the feasibility and effects of the present invention, and the present invention is limited to this one example of conditions. Is not to be done.
  • the present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.
  • Example 2 The total solid content (TS) shown in Table 2 and the petroleum-based solid caking fillers having the softening points shown in Tables 3 to 7 were pulverized, and the particle sizes of 0.01 mm or more shown in Tables 3 to 7 were obtained.
  • raw coals having blending ratios shown in Tables 3 to 7 were prepared as raw coals.
  • raw coals shown in Tables 3 to 7 some raw coals are pulverized to a ratio of particles having a particle size of 3 mm or less shown in Tables 3 to 7, and a particle size of 0.01 mm or more and 0.3 mm.
  • the ratio of the following fine powder particles was used (raw coal pulverization step).
  • FIG. 4 shows Examples 1-1 to 1-18, 2-1 to 2-6, Comparative Examples 1-1 to 1-5, 2-1 to 2-3, 3-1 to 3-9, 4- For coke of 1 to 4-5, strength (DI (15)), water content of the mixture, and content of fine powder particles having a particle size of 0.01 mm to 0.3 mm contained in the pulverized caking filler It is the graph which showed the relationship. As shown in FIG.
  • the smoke generation time which is the time during which the smoke generated when the mixture is charged into the coke oven.
  • the measurement results are shown in Tables 3 to 6 and FIG. As shown in Tables 3 to 6, the smoke generation time of all the examples was 16 seconds or less. On the other hand, in Comparative Examples 3-1 to 3-9, the smoke generation time exceeded 16 seconds.
  • FIG. 5 shows Examples 1-1 to 1-18, 2-1 to 2-6, Comparative Examples 1-1 to 1-5, 2-1 to 2-3, 3-1 to 3-9, 4- 6 is a graph showing the relationship between the smoke generation time of 1 to 4-5 and the water content of the mixture.
  • the dotted line in the horizontal direction indicates the position where the smoke generation time is 16 seconds
  • the dotted line in the vertical direction indicates the position where the moisture content is 6%.
  • the smoke generation phenomenon lasts for a longer time as the moisture content of the mixture is smaller, and becomes shorter as the moisture content of the mixture is larger. Specifically, when the water content of the mixture was 6% by mass or more, it was confirmed that the smoke generation time was 16 seconds or less. Moreover, when the moisture content in charging coal becomes less than 6 mass%, it turns out that smoke generation time may increase remarkably.
  • the present invention even if the use ratio of low-quality raw coal (non-caking coal or non-caking coal) is increased, coke having higher strength than conventional can be produced at low cost. Can do. Therefore, the present invention has high applicability in the coke manufacturing industry.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

La présente invention concerne un procédé de production de coke de résistance élevée, le procédé comprenant une étape de broyage, une étape de mélangeage, une étape de distillation à sec et une étape de séchage. Lorsque l'étape de séchage est mise en œuvre avant l'étape de mélangeage, le charbon d'entrée est séché de sorte que le mélange de l'étape de mélangeage présente une teneur en eau comprise entre 0 et 8 % en masse. De façon alternative, lorsque l'étape de séchage est mise en œuvre de façon simultanée à l'étape de mélangeage, la charge agglutinante et le charbon d'entrée préalablement broyés sont séchés pendant leur mélangeage, formant ainsi le mélange de teneur en eau comprise entre 0 et 8 % en masse. De façon alternative, lorsque l'étape de séchage est mise en œuvre après l'étape de mélangeage et avant l'étape de distillation à sec, le mélange est séché pour réduire la teneur en eau jusqu'à 0 à 8 % en masse.
PCT/JP2010/070680 2009-11-24 2010-11-19 Procédé de production de coke de résistance élevée WO2011065303A1 (fr)

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BR112012012115A BR112012012115B1 (pt) 2009-11-24 2010-11-19 método de produzir coque de alta resistência
CN201080052844.0A CN102666789B (zh) 2009-11-24 2010-11-19 高强度焦炭的制造方法
JP2011511554A JP4819197B2 (ja) 2009-11-24 2010-11-19 高強度コークスの製造方法
KR1020127014163A KR101430841B1 (ko) 2009-11-24 2010-11-19 고강도 코크스의 제조 방법

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Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS4916521B1 (fr) * 1970-01-28 1974-04-23
JPS5141701A (en) * 1974-10-07 1976-04-08 Sumitomo Metal Ind Koroyokookusuno seizoho
JPS5425922B2 (fr) * 1976-03-19 1979-08-31
JPS5767686A (en) * 1980-10-14 1982-04-24 Sumikin Coke Co Ltd Production on coke for blast furnace
JPH11116969A (ja) * 1997-10-17 1999-04-27 Sumitomo Metal Ind Ltd 乾燥石炭のコ−クス炉への装炭方法
JP2007063350A (ja) * 2005-08-30 2007-03-15 Kansai Coke & Chem Co Ltd コークス製造方法

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Publication number Priority date Publication date Assignee Title
JPH0916521A (ja) * 1995-06-30 1997-01-17 N T T Data Tsushin Kk 並列バッチ処理方式
JP4486552B2 (ja) * 2005-06-22 2010-06-23 新日本製鐵株式会社 高強度コークスの製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4916521B1 (fr) * 1970-01-28 1974-04-23
JPS5141701A (en) * 1974-10-07 1976-04-08 Sumitomo Metal Ind Koroyokookusuno seizoho
JPS5425922B2 (fr) * 1976-03-19 1979-08-31
JPS5767686A (en) * 1980-10-14 1982-04-24 Sumikin Coke Co Ltd Production on coke for blast furnace
JPH11116969A (ja) * 1997-10-17 1999-04-27 Sumitomo Metal Ind Ltd 乾燥石炭のコ−クス炉への装炭方法
JP2007063350A (ja) * 2005-08-30 2007-03-15 Kansai Coke & Chem Co Ltd コークス製造方法

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KR20120088804A (ko) 2012-08-08
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JP4819197B2 (ja) 2011-11-24
CN102666789B (zh) 2015-04-15
BR112012012115A2 (pt) 2016-04-05
TWI432564B (zh) 2014-04-01
KR101430841B1 (ko) 2014-08-18
CN102666789A (zh) 2012-09-12

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