TWI432564B - Method for producing high-strength coke - Google Patents

Description

High strength coke manufacturing method Field of invention

This invention relates to a method of high strength coke, particularly high strength coke for the manufacture of blast furnaces.

The present invention claims priority based on Japanese Patent Application No. 2009-266567, filed on Jan.

Background of the invention

The coke used as the reducing material in the blast furnace operation is required to ensure the required strength of the air permeability in the furnace. In order to produce high-strength coke, it is necessary to use a strong cohesive charcoal as a raw material for coke. However, the good quality of the sticky charcoal is depleted in resources.

Therefore, many proposals have been made in the past to disclose techniques for producing high-strength coke using low-quality non-bonded carbon and non-micro-bonded carbon.

When coke is produced by using non-bonded carbon and non-micro-bonded carbon, coke strength is increased when a bonding filler (bonding filler) is added (for example, refer to Patent Documents 1 and 2).

Usually, as a bonding filler, tar, asphalt, petroleum-based cement, and the like are used. It is preferable that the tar or the like is a liquid-filled filler material at a normal temperature, and is uniformly kneaded to the raw material carbon. In addition, it is preferable that the binder is a solid filler which is solid at room temperature, and is heated to a melting point or higher to be liquidified and kneaded to the raw material carbon (see, for example, Patent Document 3).

However, the liquid-bonded filler has troubles such as clogging of the pipe and adhesion to the inside of the kneading machine, and the handling property is difficult. Further, the solid bonded filler is necessary for the heating device for liquefying, and the equipment cost and the running cost are added, which has the disadvantage of an increase in manufacturing cost.

In these cases, there has been proposed a method for producing coke in which a solid binder filler is pulverized and mixed with a raw material carbon in a solid state (see Patent Documents 4 and 5).

More specifically, for example, Patent Document 4 describes a method for producing high-strength coke in which a solid binder filler containing 50% or more of fine particles having a particle diameter of less than 3 mm is mixed in a solid state in a raw material carbon, and It is directly charged into a coke oven for dry distillation. According to the method described in Patent Document 4, since the solid-bonding filler is uniformly dispersed in the coal particles, a strong coke structure can be obtained.

Further, Patent Document 4 describes the particle size configuration of the solid bonded filler, and the fine particles having a particle diameter of 0.3 mm or less tend to aggregate, and are preferably as small as possible.

In addition, a method of producing coke for a blast furnace has been proposed as a method for producing a coke oven, and a mixture of low-quality blended carbon and hydrocarbon-based asphalt which has a moisture content of 5% or less is used (for example, see Patent Document 6). ). According to the method described in Patent Document 6, since the bulk density of the charged carbon is large, a strong coke structure can be obtained.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 11-241072

[Patent Document 2] JP-A-2001-262155

[Patent Document 3] JP-A-57-67686

[Patent Document 4] JP-A-2007-002052

[Patent Document 5] JP-A-2007-063350

[Patent Document 6] JP-A-51-41701

However, when the solid bonded filler is pulverized and used in a solid state, fine powder particles having a particle diameter of 0.3 mm or less are generated during pulverization. As described above, the fine powder particles having a particle diameter of 0.3 mm or less are easily aggregated. The quasi-particles formed by the aggregation of the fine powder particles of the solid-bonding filler having a particle diameter of 0.3 mm or less are not easily collapsed even when mixed with the raw material carbon, and are grown during the mixing with the raw material carbon, and are made into the raw material carbon. The solid dispersion of the filler material is reduced in the dispersion. Therefore, as a solid-bonding filler, for example, even if fine particles containing a particle diameter of less than 3 mm are finely pulverized, the dispersibility of the solid-bonding filler in the raw material carbon cannot be effectively improved. Therefore, the prior art has insufficient effect of improving the coke strength by finely pulverizing the solid bonded filler.

As a result, the prior art has not been able to obtain coke by using a large amount of raw material carbon mixed with low-quality raw material carbon (non-bonded carbon and non-micro-bonded carbon) and a solid-bonded filler material containing fine particles having a particle diameter of 0.3 mm or less. The case of coke with sufficient strength. Therefore, when the solid-bonded filler material was previously pulverized and used, it was pulverized so as not to cause fine particles having a particle diameter of 0.3 mm or less, or even if it was produced, it was tried not to use the fine powder particles.

The present invention provides a method for producing a high-strength coke, which is capable of producing a high-strength coke even when a large amount of low-quality non-bonded carbon and non-micro-bonded carbon are used as raw material carbon. High-strength coke is produced by using a raw material carbon and a solid-bonded filler material containing fine powder particles having a particle diameter of 0.3 mm or less.

In order to solve the above problems, the inventors of the present invention have conducted research as described below.

In other words, the inventors of the present invention focused on the dispersibility of the pulverized and bonded filler material in the raw material carbon and the strength of the coke, and pulverized the solid-bonded filler material into a pulverized bonded filler material containing fine powder particles having a particle diameter of 0.3 mm or less. The water content of the mixture obtained by mixing with the low-quality raw material carbon containing non-bonded carbon and non-micro-bonded carbon, and the content of the fine powder particles having a particle diameter of 0.3 mm or less in the pulverized bonded filler are optimized.

As a result, the solid-bonded filler material is pulverized into a pulverized bonded filler material containing fine powder particles having a particle diameter of 0.3 mm or less, and when mixed with the raw material carbon to form a mixture, the moisture content of the mixture and the pulverized bonded filler material are clearly understood. The content of the fine powder particles (which are aggregated to form quasiparticles) having a particle diameter of 0.3 mm or less contained therein has a significant influence on the dispersibility (the strength of the left and right coke) of the pulverized and bonded filler in the raw material carbon. Further, it was found that the more the content of the fine powder particles having a particle diameter of 0.3 mm or less, the higher the coke strength.

In addition, it has been found that the content of the fine powder particles having a particle diameter of 0.3 mm or less contained in the pulverized bonded filler material and the moisture content of the mixture are within a predetermined range, and the fine powder particles of the solid bonded filler having a particle diameter of 0.3 mm or less are aggregated. The particle size of the quasi-particles is increased, and it is suitable for mixing with the raw material carbon, and the pulverized and bonded filler can be uniformly dispersed in the raw material carbon, and the bulk density of the mixture can be increased to obtain high-strength coke.

Specifically, when the pulverized bonded filler containing 50% by mass or more of the fine particles having a particle diameter of 0.3 mm or less is mixed with the raw material carbon to form a mixture, the moisture content of the mixture is preferably 8% by mass or less. When the pulverized bonded filler containing 30% by mass or more of the fine particles having a particle diameter of 0.3 mm or less is mixed with the raw material carbon to form a mixture, the moisture content of the mixture may be 7% by mass or less.

The present invention has been made based on the above new knowledge, and the gist thereof is as follows.

(1) A method for producing high-strength coke, comprising:

a pulverization step of pulverizing a solid binder filler to form a pulverized cement filler containing 50% by mass or more and 100% by mass or less of fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less; and a mixing step of pulverizing a mixture of a binder filler and a raw material carbon to prepare a mixture; a dry distillation step of dry distillation of the mixture; and a drying step before the foregoing mixing step, at the same time as the foregoing mixing step, or after the foregoing mixing step and before the dry distillation step When the drying step is performed before the mixing step, the raw material carbon is dried in the drying step so that the moisture content of the mixture in the mixing step is 0% by mass or more and 8% by mass. When the drying step is performed simultaneously with the mixing step, in the drying step, the pulverized cemented filler and the raw material carbon are mixed and dried to form a moisture content of 0% by mass or more and 8% by mass or less. The aforementioned mixture, the aforementioned drying step is carried out after the aforementioned mixing step and before the aforementioned dry distillation step When, in this drying step, the Department of the mixture was dried, the moisture content of the mixture is more than 0 mass% to 8 mass%.

(2) A method for producing high-strength coke, which has:

a pulverization step of pulverizing the solid binder filler to form a pulverized cement filler containing 30% by mass or more and 100% by mass or less of fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less; and a mixing step of pulverizing a mixture of a binder filler and a raw material carbon to prepare a mixture; a dry distillation step of dry distillation of the mixture; and a drying step before the foregoing mixing step, at the same time as the foregoing mixing step, or after the foregoing mixing step and before the dry distillation step When the drying step is performed before the mixing step, the raw material carbon is dried in the drying step so that the moisture content of the mixture in the mixing step is 0% by mass or more and 7% by mass. When the drying step is performed simultaneously with the mixing step, the moisture content is 0% by mass or more and 7% by mass or less by drying the pulverized cemented filler and the raw material carbon while the drying step is performed. The aforementioned mixture, the aforementioned drying step is carried out after the aforementioned mixing step and before the aforementioned dry distillation step When, in this drying step, the Department of the mixture was dried, the moisture content of the mixture is more than 0 mass% and 7 mass% or less.

Further, the fine powder particles of the solid bonded filler having a particle diameter of 0.3 mm or less obtained by pulverizing the solid bonded filler are loaded into the pulverized bonded filler and the raw material char in the coke oven used in the dry distillation step. Dust when the mixture is in use. The phenomenon of fuming (dusting) is a phenomenon in which fine particles contained in a solid bonded filler material fly into the air like smoke. The dusting of the fine powder particles of the solid bonded filler material can contaminate the manufacturing environment. Therefore, the inventors of the present invention focused on the phenomenon of smoking (dusting).

In order to avoid the dust-contaminated manufacturing environment of the micro-powder particles of the solid-bonded filler material, as a method for preventing dust generation in environmental management, it is considered to be a solid-bonded filler material after pulverization, or a mixture of pulverizing the bonded filler material and the raw material carbon. Add moisture to prevent dusting.

However, in order to prevent dust generation of the fine powder particles having a particle diameter of 0.3 mm or less and to add moisture, the fine powder particles of the solid-bonding filler are aggregated to form quasi-particles, and the solid-bonded filler material is finely ground. The effect of pulverization to increase the strength of coke becomes insufficiently obtained. In addition, when the water is added to the fine powder particles of the solid-bonding filler to prevent dust generation, the bulk density of the pulverized filler filler and the raw material carbon is lowered, and the coke strength may be insufficient.

Therefore, the inventors of the present invention focused on the generation of dust by the fine powder particles having a particle diameter of 0.3 mm or less of the solid-bonded filler, and optimized the moisture content contained in the following mixture, including: pulverizing the solid bonded filler material. a bonded filler material mixed with the raw material carbon and dried to obtain a dried mixture; a mixture obtained by mixing the pulverized bonded filler material with the dried raw material carbon; and drying while mixing the pulverized bonded filler material with the raw material carbon The resulting dried mixture is obtained.

As a result, it was found that the dust content of the fine powder particles can be prevented by setting the moisture content of the mixture to 6% by mass or more. (3) The method for producing a high-strength coke according to the above (1) or (2), further comprising a moisture adjustment step of: after the drying step and before the dry distillation step, the moisture content of the mixture is Water is added in a manner of 6 mass% or more. (4) The method for producing a high-strength coke according to the above (1) or (2), wherein the pulverization bonding filler containing 80% by mass or more of particles having a particle diameter of 3 mm or less is formed in the pulverization step. (5) The method for producing high-strength coke according to the above (1) or (2), wherein the raw material carbon may contain one of 20% by mass or more and 60% by mass or less of non-bonded carbon and non-micro-bonded carbon. Or both parties. (6) The method for producing high-strength coke according to the above (1) or (2), wherein in the drying step, the mixture is heated at a temperature lower than a softening point of the solid bonded filler.

According to the above aspects of the present invention, even if a low-quality one in which non-bonded carbon and non-micro-bonded carbon are blended in a large amount is used as the raw material carbon, the pulverized bonded filler having the fine particle diameter of 0.3 mm or less can be made uniform. The method is capable of producing a high-strength coke by dispersing it in the raw material carbon and increasing the bulk density of the mixture of the pulverized bonded filler and the raw material carbon.

Simple illustration

Fig. 1 is a flow chart for explaining a method for producing a high-strength coke according to an embodiment of the present invention, which is an example of a method for producing high-strength coke according to the present invention.

Fig. 2 is a flow chart for explaining a method for producing high-strength coke according to a third embodiment of the present invention, which is an example of a method for producing high-strength coke.

Fig. 3 is a flow chart for explaining a method for producing high-strength coke according to a fourth embodiment of the present invention, which is an example of a method for producing high-strength coke.

Fig. 4 shows Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9. 4-1 to 4-5, a graph showing the relationship between the coke strength (D(15)), the moisture content of the mixture, and the content of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler.

Fig. 5 shows Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9. A graph showing the relationship between the smoking time of 4-1 to 4-5 and the moisture content of the mixture.

Form for implementing the invention

Each embodiment of the present invention will be described in detail.

The inventors of the present invention have been able to use the solid-bonded filler which is a solid state filler containing fine particles (particles having a particle diameter of 0.3 mm or less) in a solid state, that is, the pulverized cement filler can be uniformly dispersed in the raw material carbon and mixed. In the case of fine particles having a particle diameter of 0.3 mm or less which have not been used in the past, the coke strength can be further improved, and a method of uniformly mixing the solid binder filler containing fine particles having a particle diameter of 0.3 mm or less in the raw material carbon is carried out. Heart research.

The inventors of the present invention intensively investigated the properties of the quasi-particles forming the fine particles of the solid-bonding filler. As a result, the following (x) to (z) are clearly understood.

(x) A film in which water is formed on the surface of the fine particles of the solid bonded filler. The film of water has an effect of enhancing aggregation and bonding between fine particles, and forms quasi-particles which are not easily collapsed.

(y) The film of water on the surface of the fine particles of the solid bonded filler is easily removed by heating. Further, when the film of water on the surface of the fine particles disappears, the quasi-particles collapse.

(z) by adjusting the amount of water in the solid-bonding filler material containing the fine particles forming the quasi-particles, and/or the moisture content in the mixture of the solid-bonding filler and the raw material carbon containing the fine particles forming the quasiparticles The size (particle diameter) of the quasiparticles is adjusted so as to prevent dust generation of the fine powder particles of the solid-bonding filler, and is suitable for the size (particle diameter) uniformly mixed with the raw material carbon.

Based on the above knowledge (x) to (z), before the solid bonded filler material is mixed with the raw material carbon, the solid bonded filler material and the raw material carbon are mixed, and the solid bonded filler material is mixed with the raw material carbon to form a uniform mixing with the raw material carbon. When the solid particles of the particle size are bonded to the quasi-particles of the fine particles of the filler, it is possible to uniformly disperse the solid-bonded filler containing the fine particles having a particle diameter of 0.3 mm or less which forms the quasi-particles while preventing dust generation of the fine particles. In the raw material charcoal. As a result, high-strength coke can be obtained.

In addition, the inventors of the present invention pulverized the solid-bonded filler material in which the raw material carbon was mixed, and changed the pulverization conditions using a pulverizer, and measured the content of fine particles having a particle diameter of 3 mm or less contained in the solid-bonded filler material after pulverization ( Content (% by mass) and content (% by mass) of fine particles having a particle diameter of 0.3 mm or less.

When the content of the fine particles of 0.3 mm or less is 30% by mass or more, the content of the fine particles of 3 mm or less is 80% by mass or more, and the content of the fine particles of 3 mm or less is changed. small. On the other hand, the content of the fine particles of 0.3 mm or less is in a region where the content of the fine particles of 3 mm or less is 80% by mass or more, and the amount of change in the content is large.

Therefore, the present inventors have set the content (% by mass) of the fine particles of the solid bonded filler having a particle diameter of 0.3 mm or less as the property of evaluating the pulverized solid bonded filler (pulverized bonded filler), that is, the quasi-particle forming ability. It is used as an indicator (a indicator of the properties of a solid bonded filler).

In addition, the inventors of the present invention pulverized the solid-bonded filler material into a pulverized bonded filler material containing fine particles of 0.3 mm or less, and mixed the raw material carbon by 2% by mass to form a mixture, and a dryer was used. The mixture was dried to obtain a dry mixture having a moisture content of 7% by mass, and the dried mixture was dry-distilled to produce coke, and the property index of the solid-bonded filler was investigated (the content of fine particles having a particle diameter of 0.3 mm or less of the solid-bonded filler) Relationship with coke indicators. In addition, as a quality index of coke, a weight ratio of 15 mm or more (hereinafter referred to as DI (15)) of 150 rotation in accordance with the rotation strength test drum method prescribed in JIS K2151 is used.

As a result, when the pulverized filler-filled material contains 33.9% by mass of fine particles of 0.3 mm or less, high coke strength (DI(15)) can be secured. In addition, when the content of fine particles of 0.3 mm or less contained in the pulverized bonded filler is increased from 33.9 mass% to 48.3% by mass, the coke strength (DI(15)) is improved.

By increasing the content of fine particles of 0.3 mm or less contained in the pulverized bonded filler, the coke strength (DI(15)) is improved and other qualities are improved, and it is presumed that under appropriate water content, fine particle formation is suitable. The quasi-particles mixed with the raw material carbon cause the pulverized and bonded filler material to be uniformly dispersed in the raw material carbon.

In the present embodiment, the following adjustments are made to the basic technical idea in the required range: (i) agglomerated to form a fine powder of quasi-particles, specifically, a pulverized bonded filler material obtained by pulverizing a solid bonded filler material. The content of the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less; and (ii) the moisture content contained in the mixture obtained by mixing and pulverizing the bonded filler and the raw material carbon.

[First Embodiment]

Fig. 1 is a flow chart for explaining a method for producing a high-strength coke according to an embodiment of the present invention, which is an example of a method for producing high-strength coke according to the present invention.

As shown in Fig. 1, the method for producing high-strength coke according to the first embodiment includes a pulverization step S1, a raw material carbon pulverization step S2, a mixing step S3, a drying step S4, a moisture adjustment step S5, and a dry distillation step S6.

The pulverization step S1 is a step of pulverizing the solid-bonded filler material x into a pulverized bonded filler material containing fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less and having a particle diameter of 50% by mass or more and 100% by mass or less as shown in Fig. 1 . . The pulverized bonded filler is a state in which the solid is bonded to the pulverized material (solid state).

In the present embodiment, in order to obtain coke having a sufficient strength, the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler are 50% by mass or more. In addition, the more the content of the fine particles having a particle diameter of 0.3 mm or less contained in the pulverized filler material, the more the coagulated filler can be more uniformly dispersed in the raw material carbon, the coke strength can be improved, which is preferable. .

Moreover, it is preferable to pulverize the fine particles having a particle diameter of 0.3 mm or less contained in the bonded filler to increase the coke strength as the particle size is finer. In order to be efficiently classified using a sieve, the particle diameter is set to have a particle diameter of 0.01 mm or more. In addition, when the particle size of the fine particles having a particle diameter of 0.3 mm or less contained in the pulverized bonded filler material is made fine, the coke oven used in the dry distillation step is loaded with the pulverized cement filler and the raw material carbon. It is easy to generate dust, and it is preferable that the particle diameter is 0.1 mm or more.

In addition, in the pulverization step S1, in order to further uniformly disperse the pulverized-bonding filler in the raw material carbon, it is preferable to use a pulverized-bonded filler containing 80% by mass or more of particles having a particle diameter of 3 mm or less.

As the solid bonded filler x, a petroleum-based pitch which can be obtained in a large amount, and a coal-based pitch can be used, and it is preferable to use a softening point of 180 ° C, and it is more preferable to use 140 ° C or less.

In the raw material carbon pulverization step S2, as shown in Fig. 1, the raw material carbon y is pulverized to have a particle diameter of 3 mm or less and a particle diameter of 3 mm or less, and is contained in an amount of 0% by mass or more and 30% by mass or less. The step of finely pulverizing particles having a particle diameter of 0.01 mm or more and 0.3 mm or less.

In order to further uniformly disperse the pulverized and bonded filler material in the raw material carbon, the fine powder particles of the raw material carbon y preferably have a particle diameter of 0.3 mm or less, and the particle size can be classified efficiently by using a sieve to have a particle diameter of 0.01 mm. The above is better. Further, when the raw material carbon y contains the fine powder particles in the above particle size range, it is preferable to further disperse the pulverized and bonded filler material in the raw material carbon, but it is preferably used during transportation and in the dry distillation step. When the coke oven is charged with the pulverized bonded filler and the raw material carbon, dust generation is likely to occur, and the content of the fine powder particles in the above-mentioned particle size range of the raw material carbon y is preferably 30% by mass or less.

Although the raw material carbon pulverization step S2 may not be performed, the pulverized filler filler material can be further uniformly dispersed in the raw material carbon by the raw material carbon pulverization step S2. In the raw material carbon pulverization step S2, it is more preferable to pulverize the raw material carbon y to 100% by mass of particles having a particle diameter of 3 mm or less in order to more uniformly disperse the pulverized filler filler in the raw material carbon.

Further, the raw material carbon y is preferably one or both of non-bonded carbon and non-micro-bonded carbon containing 20% by mass or more and 60% by mass or less. When the content of one or both of the non-bonded carbon and the non-micro-bonded carbon contained in the raw material carbon y is 20% by mass or more, the amount of strongly-bonded carbon used in the raw material carbon y can be sufficiently reduced. effect.

In addition, when the content of one or both of the non-bonded carbon and the non-micro-bonded carbon contained in the raw material carbon y is more than 60% by mass, it is difficult to secure a coke of (DI(15)) 85 or more even if a bonded filler is added. strength.

In the mixing step S3, the solid-bonded filler in a solid state, that is, the pulverized bonded filler (containing fine particles having a particle diameter of 0.3 mm or less which is aggregated to form a quasi-particle), and the raw material carbon pulverized in the raw material carbon pulverizing step S2 The step of mixing into a mixture.

The mixing ratio of the pulverized bonded filler to the raw material carbon is not particularly limited, and when a raw material carbon y containing one or both of non-bonded carbon and non-micro-bonded carbon of 20% by mass or more and 60% by mass or less is used, in order to secure ( DI (15)) 85 or more is preferably 0.5% by mass: 100% by mass (pulverized bonded filler: raw material carbon) to 5% by mass: 100% by mass.

The drying step S4 is a step of drying the mixture into a dry mixture having a moisture content of 0% by mass or more and 8% by mass or less using a dryer or the like.

When the moisture content of the dry mixture is excessive, the fine particles formed by agglomerating fine particles having a particle diameter of 0.3 mm or less contained in the solid-bonding filler are grown in excess of the size (particle diameter) suitable for uniformly mixing with the raw material carbon, resulting in growth. The coarsening of the quasiparticles causes inconsistencies in the quasiparticle size (particle size). Therefore, the solid-bonded filler material becomes difficult to be uniformly dispersed in the raw material carbon, resulting in a decrease in coke strength or a variation in coke strength.

The moisture content of the dry mixture necessary for forming the quasi-particles of the solid-bonded filler material of a size (particle size) uniformly mixed with the raw material carbon depends on the type and character of the solid-bonded filler material, that is, The content of fine particles having a particle diameter of 0.3 mm or less contained in the pulverized bonded filler material obtained by pulverizing the solid bonded filler.

When the moisture content of the dry mixture exceeds 8% by mass, the quasiparticles having a particle diameter suitable for uniformly mixing with the raw material carbon cannot be formed, and it is difficult to uniformly disperse the pulverized filler filler in the raw material carbon, so that the strength of the coke is insufficient. In order to further uniformly disperse the pulverized and bonded filler material in the raw material carbon, the moisture content of the dry mixture is preferably less, and particularly preferably 7% by mass or less.

In addition, although the moisture content of the dry mixture may be 0% by mass, in order to enable the drying time of the mixture to be short, the drying step S4 can be efficiently performed, and at the time of transportation and coke can be prevented. When the furnace is charged with a dry mixture, dust is generated, and it is preferably 6 mass% or more. In addition, when the moisture content of the dry mixture is 6% by mass or more, even after the drying step S4 and before the dry distillation step S6, the moisture content of the dry mixture is not more than 6 mass%, and the moisture content of the dry mixture is not more than 6 mass%. Fully prevent dusting. Therefore, coke can be efficiently produced compared to when the moisture adjustment step S5 is performed.

In the drying step S4, it is preferred to heat the mixture at a temperature below the softening point of the solid bonded filler. Thereby, the dry mixture can be efficiently obtained by heating the mixture at a temperature at which the solid-bonded filler material does not liquefy-melt. Specifically, the temperature at which the mixture is heated in the drying step S4 is preferably 100 ° C or lower. Further, in order to dry the mixture efficiently, the temperature at which the mixture is heated in the drying step S4 is preferably 50 ° C or higher.

The moisture adjustment step S5 is a step of adding water so that the moisture content of the dry mixture is 6 mass% or more after the drying step S4 and before the dry distillation step S6. By performing the moisture adjustment step S5, it is possible to prevent dust generation of the fine powder particles having a particle diameter of 0.3 mm or less contained in the pulverized and bonded filler of the dry mixture. Moreover, the moisture adjustment step S5 may be performed when the moisture content of the dry mixture after the drying step S4 is 6% by mass or more, and may not be performed.

When the moisture content of the dry mixture is 6% by mass or more, the fine particles formed by agglomerating fine particles having a particle diameter of 0.3 mm or less contained in the solid-bonding filler do not collapse and do not generate dust. However, when the moisture content of the dry mixture is less than 6% by mass, the quasi-particles of the solid-bonded filler material collapse and a large amount of fine particles are generated, and a smoke (dusting) phenomenon appears. Therefore, by forming the quasi-particles in which the fine powder particles of the solid-bonding filler do not collapse, it is estimated that the moisture content of the dry mixture necessary for preventing dust generation of the fine powder particles of the solid-bonding filler is 6 mass% or more.

When the quasi-particles of the solid-bonded filler material collapse and a large amount of fine particles are generated and smoke is generated, the solid-bonded filler in the dry mixture disappears and contaminates the working environment. Therefore, from the viewpoint of suppressing the phenomenon of fuming (dusting) when the coke oven is charged with a dry mixture of the solid bonded filler and the raw material carbon, the moisture content of the dry mixture is 6 mass% from the moisture adjustment step S5. The above is better. By setting the moisture content of the dry mixture to 6% by mass or more, the smoking time when the coke oven is charged into the dry mixture can be set to 16 seconds or less of the reference value of the Clean Air Act.

In addition, as described below, fine particles having a particle diameter of 0.3 mm or less contained in the solid bonded filler can be treated as fine particles forming quasiparticles. The reason for this is explained using Table 1.

Table 1 shows the results of measuring the particle size distribution of the dust collected dust (mixture of solid bonded filler and raw material carbon) having a moisture content of 5.3%.

The carbon content (the humidity-control moisture) shown in Table 1 is 6% by mass or less, and is generated when the coke oven is charged. In addition, it is considered that the dust-collecting dust-based quasi-particles charged with carbon shown in Table 1 collapsed. As shown in Table 1, the particle size of the dust collecting dust is 300 μm or less (=0.3 mm [refer to the particle diameter in the leftmost column in Table 1)). From this, it is estimated that fine particles having a particle diameter of 0.3 mm or less form a quasiparticle. Therefore, the fine particles having a particle diameter of 0.3 mm or less contained in the solid-bonding filler can be treated to form fine particles of the quasi-particles. s

The dry distillation step S6 is a step of dry distillation of the dry mixture. The dry distillation of the dry mixture can be carried out using a coke oven. As shown in Fig. 1, coke z can be obtained by performing the dry distillation step S6.

The method for producing a high-strength coke according to the present embodiment includes a pulverization step S1 in which the solid-bonded filler is pulverized to a fine particle content of 50% by mass or more and 100% by mass or less and a particle diameter of 0.01 mm or more and 0.3 mm or less. a pulverizing and bonding filler; a mixing step S3 of mixing the pulverized cemented filler material and the raw material carbon into a mixture; and a carbonization step S6, which is a dry distillation of the mixture; and a method of the S4 drying step, which is in the mixing step S3 Thereafter, before the dry distillation step S6 (between the mixing step S3 and the dry distillation step S6), the mixture is dried to set the moisture content of the mixture to 0% by mass or more and 8% by mass or less. Therefore, even if a large amount of low-quality non-bonded carbon and non-micro-bonded carbon are used as the raw material carbon, the pulverized bonded filler having the fine powder particles having a particle diameter of 0.3 mm or less can be uniformly dispersed in the raw material carbon. At the same time, the bulk density of the mixture of the pulverized bonded filler and the raw material carbon can be increased, so that high-strength coke z can be produced.

In addition, the method of producing the high-strength coke according to the present embodiment includes a water-removing step S5, in which the moisture content of the dry mixture is 6% by mass or more after the drying step S4 and before the dry distillation step S6. Therefore, by using a pulverized bonded filler material containing raw material carbon and fine powder particles having a particle diameter of 0.3 mm or less, it is possible to prevent the generation of dust of the fine powder particles which are pulverized and bonded, and to produce high-strength coke z.

[Second Embodiment]

In the above-described first embodiment, the pulverized bonded filler material containing 50% by mass or more and 100% by mass or less of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less is mixed with the raw material carbon to form a mixture, and is exemplified. The case where the water content of the mixture is 0% by mass or more and 85% by mass or less is described as an example. In the present embodiment, the particle diameter of 30% by mass or more and 100% by mass or less is 0.01 mm or more and 0.3 mm. The pulverized-bonded filler of the following fine powder particles is mixed with the raw material carbon to form a mixture, and the case where the moisture content of the mixture is 0% by mass or more and 75% by mass or less is described.

In the method for producing a high-strength coke according to the present embodiment, the content of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less and the moisture content of the mixture, which are contained in the pulverized filler filler, can be set as the first The same method as in the embodiment.

The method for producing a high-strength coke according to the present embodiment includes a pulverization step of pulverizing the solid-bonded filler into fine particles having a particle diameter of 0.01% or more and 0.3 mm or less of 30% by mass or more and 100% by mass or less. a pulverizing filler filler; a mixing step of mixing the pulverized bonded filler material and the raw material carbon into a mixture; and a dry distillation step S6 of dry distillation of the mixture; and a method of drying the step after the mixing step and the foregoing dry distillation Before the step (between the mixing step and the dry distillation step), the mixture is dried to set the moisture content of the mixture to 0% by mass or more and 7% by mass or less.

In the present embodiment, in order to further increase the strength of the coke, the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less which are contained in the pulverized bonded filler are 30% by mass or more, in order to further increase the strength of the coke. It is preferably 40% by mass or more, and more preferably 50% by mass or more.

In addition, in the present embodiment, the content of the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized filler filler is 30% by mass or more and 100% by mass or less, and the moisture content of the dried mixture exceeds 7 mass%. In this case, it is impossible to form a quasiparticle of a particle diameter suitable for mixing with the raw material carbon, and it is difficult to uniformly disperse the pulverized cement filler in the raw material carbon, and the coke strength may be insufficient.

In order to further uniformly disperse the pulverized bonded filler in the raw material carbon, the moisture content of the dry mixture is preferably less, and particularly preferably 6.5 mass% or less.

In addition, although the moisture content of the dry mixture may be 0% by mass, in order to allow the time required for drying the mixture to be short, the drying step can be efficiently performed, and at the time of transportation, and in the coke oven can be prevented. When the dry mixture is charged, dust is generated, and it is preferably 6 mass% or more. In addition, when the moisture content of the dry mixture is 6% by mass or more, the moisture content of the dry mixture is not more than 6 mass%, and the moisture content of the dry mixture can be sufficiently prevented even after the drying step and before the dry distillation step. Dust. Therefore, coke can be efficiently produced compared to when the moisture adjustment step is performed.

In the present embodiment, the content of the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized filler material is 30% by mass or more and 100% by mass or less, and the mixture is dried to have a moisture content of 0% by mass. The dry mixture of % or more and 7% by mass or less can uniformly disperse the pulverized and bonded filler containing fine particles having a particle diameter of 0.3 mm or less in the raw material carbon.

Therefore, in the method of producing high-strength coke according to the present embodiment, similarly to the first embodiment, even when a large amount of low-quality non-bonded carbon and non-micro-bonded carbon are used as the raw material carbon, it is possible to The pulverized bonded filler containing fine particles having a particle diameter of 0.3 mm or less is uniformly dispersed in the raw material carbon, and at the same time, the bulk density of the mixture of the pulverized bonded filler and the raw material carbon can be increased, so that high-strength coke can be produced.

[Third embodiment]

Fig. 2 is a flow chart for explaining a method for producing high-strength coke according to a third embodiment of the present invention, which is an example of a method for producing high-strength coke. In the first embodiment and the second embodiment described above, the drying step S4 is performed after the mixing step S3 and before the carbonization step S6, and the method for producing the high-strength coke according to the third embodiment is as shown in Fig. 2 The drying step S41 is performed before the mixing step S31.

The method for producing high-strength coke according to the present embodiment can be the same as the first embodiment or the second embodiment except that the drying step S41 is performed before the mixing step S31.

In other words, the method for producing high-strength coke according to the present embodiment includes a pulverization step S1 in which the solid-bonded filler is pulverized to be contained in an amount of 50% by mass or more and 100% by mass or less (or 30% by mass or more and 100% by mass or less of the finely pulverized filler filler having a particle diameter of 0.01 mm or more and 0.3 mm or less; a raw material carbon pulverization step S2; and a mixing step S31 of mixing the pulverized bonded filler material and the raw material carbon And a mixture; a moisture adjustment step S5; and a dry distillation step S6, which is a dry distillation of the mixture; and a method of drying the step S41 before the mixing step S41, the drying step S41 is to dry the raw material char and to make the mixture in the mixing step The content of the water content is 0% by mass or more and 8% by mass or less. When the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler are 30% by mass or more and 100% by mass or less, the content is 0% by mass. Above and 7 mass% or less).

In the drying step S41 of the present embodiment, the pulverized raw material carbon is dried by a dryer or the like, and the moisture content of the mixture in the mixing step 31 is 0% by mass or more and 8% by mass or less (including in the pulverized bonded filler). When the fine particles having a particle 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, the content is 0% by mass or more and 7% by mass or less.

In the drying step S41, the target value of the moisture content range of the raw material carbon after the drying step S41 is calculated in advance, and the raw material carbon is dried so as to become the target value. The target value of the moisture content range of the raw material carbon after the drying step S41 can be calculated as follows. That is, the moisture content of the pulverized bonded filler and the content of the pulverized bonded filler contained in the mixture are used to determine the moisture content of the raw material carbon in the mixture in the mixing step within the above range.

In addition, although the moisture content of the raw material carbon after the drying step S41 is 0% by mass, the drying step S41 can be efficiently performed in order to prevent the time required for drying the raw material carbon to be short. Dust is generated during transportation and when the dry mixture is charged in the coke oven, so that the moisture content of the mixture is preferably 6% by mass or more.

In addition, when the moisture content of the dry mixture obtained by mixing the pulverized bonded filler and the raw material carbon after the drying step S41 is 6% by mass or more, the moisture is not added after the drying step S41 and before the dry distillation step S6. In the adjustment step S5, the moisture content of the dry mixture is 6% by mass or more, and dust generation can be sufficiently prevented. Therefore, coke can be efficiently produced compared to when the moisture adjustment step S5 is performed.

In the drying step S41, it is preferred to heat the raw material carbon. Thereby, the raw material carbon can be dried efficiently. The temperature at which the raw material carbon is heated is not particularly limited, and in order to prevent the mixing step S31 performed after the drying step S41, the solid-bonded filler material after contact with the raw material carbon is liquefied-melted, and the temperature below the softening point of the solid-bonded filler material is formed. It is better.

The mixing step S31 is a step of mixing a solid bonded filler in a solid state, that is, a pulverized bonded filler and a raw material carbon, into a mixture, and the pulverized bonded filler material contains fine powder particles having a particle diameter of 0.3 mm or less which is aggregated to form a quasiparticle; The raw material carbon is pulverized in the raw material carbon pulverizing step S2 and dried in the drying step S41.

In the pulverization step S1, the content of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler is 50% by mass or more and 100% by mass in the pulverization step S1. % or less (or 30% by mass or more and 100% by mass or less), in the drying step S41, the moisture content of the mixture in the mixing step S31 is 0% by mass or more and 8% by mass or less (in the pulverized bonded filler) When the fine particles having a particle 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, it is 0% by mass or more and 7% by mass or less. Therefore, similarly to the above-described first embodiment and the second embodiment, even when a large amount of low-quality non-adhesive carbon and non-micro-bonded carbon are used as the raw material carbon, the particle diameter can be made 0.3 mm or less. The pulverized and bonded filler material of the fine powder particles is uniformly dispersed in the raw material carbon, and at the same time, the bulk density of the mixture of the pulverized bonded filler material and the raw material carbon can be increased, so that high-strength coke can be produced.

[Fourth embodiment]

Fig. 3 is a flow chart showing a method for producing high-strength coke according to a fourth embodiment of the method for producing high-strength coke according to the present invention. In the first embodiment and the second embodiment described above, the drying step S4 is performed after the mixing step S3 and before the dry distillation step 6. As shown in Fig. 3, the method for producing the high-strength coke according to the third embodiment is The drying step is carried out simultaneously with the mixing step S32.

The method for producing high-strength coke according to the present embodiment can be the same as the first embodiment or the second embodiment except that the drying step is performed simultaneously with the mixing step S32.

In other words, the method for producing high-strength coke according to the present embodiment includes a pulverization step S1 in which the solid-bonded filler is pulverized to be contained in an amount of 50% by mass or more and 100% by mass or less (or 30% by mass or more and 100% by mass or less of the finely pulverized filler filler having a particle diameter of 0.01 mm or more and 0.3 mm or less; a raw material carbon pulverization step S2; and a mixing step S32 of mixing the pulverized bonded filler material and the raw material carbon And a mixture; a moisture adjustment step S5; and a dry distillation step S6, which is a dry distillation of the mixture; and a drying step is performed simultaneously with the mixing step S32, and the mixture is pulverized and bonded to the raw material carbon to be dried to form moisture. The content is 0% by mass or more and 8% by mass or less (when the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less which are contained in the pulverized filler-filled material are 30% by mass or more and 100% by mass or less, the content is 0% by mass or more. A mixture of 7 mass% or less. Therefore, in the present embodiment, the mixing step S32 has a drying step.

In the drying step (mixing step 32) of the present embodiment, the pulverized bonded filler and the raw material carbon are dried by using a dryer or the like to form a moisture content of 0% by mass or more and 8% by mass or less (in the pulverized bonded filler material). When the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less are contained in a mixture of 30% by mass or more and 100% by mass or less, the mixture is 0% by mass or more and 7% by mass or less.

In the pulverization step S1, the content of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler is 50% by mass or more and 100% by mass in the pulverization step S1. % or less (or 30% by mass or more and 100% by mass or less), in the drying step (mixing step 32), the pulverized cemented filler and the raw material carbon are mixed and dried using a dryer or the like to form a moisture content of 0% by mass. 8% by mass or more (when the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less are contained in the viscous bonded filler, 30% by mass or more and 100% by mass or less, 0% by mass or more and 7% by mass or less) a mixture. Therefore, similarly to the above-described first embodiment and the second embodiment, even when a large amount of low-quality non-adhesive carbon and non-micro-bonded carbon are used as the raw material carbon, the particle diameter can be made 0.3 mm or less. The pulverized and bonded filler material of the fine powder particles is uniformly dispersed in the raw material carbon, and at the same time, the bulk density of the mixture of the pulverized bonded filler material and the raw material carbon can be increased, so that high-strength coke can be produced.

[Examples]

Subsequently, the embodiments of the present invention will be described. In order to confirm the implementation possibilities and effects of the present invention, the conditions of the examples are based on a conditional example, but the present invention is not limited by the conditional example. The present invention can achieve various objects without departing from the gist of the present invention.

(Example)

The petroleum-based solid-bonding filler of the total sulfur content (TS) shown in Table 2 and the softening point shown in Tables 3 to 7 is pulverized to obtain a pulverized bonded filler, and the particle size of the pulverized bonded filler is 0.01 mm or more. The content of the fine particles of 0.3 mm or less and the content of the particles having a particle diameter of 3 mm or less are shown in Tables 3 to 7. (shredding step)

In addition, as the raw material carbon, the raw material carbons of the mixing ratios shown in Tables 3 to 7 are prepared, and among the raw material carbons shown in Tables 3 to 7, a part of the raw material carbons are pulverized to form Tables 3 to 7. The ratio of the particles having a particle diameter of 3 mm or less and the ratio of the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less (the raw material carbon pulverization step).

Next, the raw material carbons of Examples 5-1 to 5 to 5 and Comparative Examples 5-1 to 5-5 were placed in a dryer and dried (drying step). Subsequently, the dried raw material carbon and the pulverized bonded filler shown in Table 5 were mixed at a ratio shown in Table 5 to obtain a mixture of moisture contents shown in Table 5 (mixing step).

Subsequently, water (moisture adjustment step) was added to the mixture of Examples 5-1 to 5-5 and Comparative Examples 5-1 to 5-5 to obtain a mixture of moisture contents shown in Table 5. Subsequently, the mixture obtained in this manner was subjected to dry distillation using a coke oven to obtain coke (dry distillation step) of Examples 5-1 to 5-5 and Comparative Examples 5-1 to 5-5.

Further, the raw material carbons of Examples 6-1 to 6-5, Examples 7-1 to 7-5, Comparative Examples 6-1 to 6-5, and Comparative Examples 7-1 to 7-5, and Table 6 and The pulverized bonded filler shown in Table 7 was placed in a dryer using the ratios shown in Tables 6 and 7, and dried while mixing to obtain a mixture of moisture contents shown in Tables 6 and 7 (mixing step and drying step).

Subsequently, only the mixture of Examples 6-1 to 6-5 and Comparative Examples 6-1 to 6-5 was added with water (moisture adjustment step) to obtain a mixture of moisture contents shown in Table 6. Subsequently, the mixture thus obtained was subjected to dry distillation using a coke oven to give Examples 6-1 to 6-5, Examples 7-1 to 7-5, Comparative Examples 6-1 to 6-5, and Comparative Example 7 -1 to 7-5 of coke (dry distillation step).

Further, the raw material carbons of Examples 1-1 to 1-18, 2-1 to 2-6, Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9 were used. The pulverized bonded fillers shown in Tables 3 and 4 were mixed at a ratio shown in Tables 3 and 4 to form a mixture (mixing step). Subsequently, the mixture was dried in a dryer to obtain a mixture of moisture contents shown in Tables 3 and 4 (drying step).

Subsequently, the moisture of the mixture of Examples 1-1 to 1-18, 2-1 to 2-6, Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9 was added. (Moisture adjustment step).

Subsequently, the mixture obtained in this manner was subjected to dry distillation using a coke oven to obtain Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2--1. ~2-3, 3-1 to 3-9 coke (dry distillation step).

Further, the raw material carbons of Comparative Examples 4-1 to 4-5 and the pulverized bonded fillers shown in Table 4 were mixed at a ratio shown in Table 4 to obtain a mixture of moisture contents shown in Table 4.

Subsequently, the obtained mixture was subjected to dry distillation using a coke oven to obtain coke of Comparative Examples 4-1 to 4-5 (dry distillation step).

The coke strength of all of the examples and all of the comparative examples obtained in this manner was measured. Further, DI (15) was measured as an index of coke strength. The measurement results are shown in Tables 3 to 6, and FIG.

As shown in Tables 3 to 6, in all the examples, the coke strength was remarkably enhanced as compared with all of the comparative examples.

Fig. 4 shows Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9. 4-1 to 4-5, a graph showing the relationship between the coke strength (D(15)), the moisture content of the mixture, and the content of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler.

As shown in Fig. 4, when the pulverized bonded filler containing 50% by mass or more of the fine particles having a particle diameter of 0.01 mm or more and 0.3 mm or less is mixed with the raw material carbon to form a mixture, the moisture content of the mixture is set to 8 mass. When the content of the water content of the mixture is 7% by mass or less, when the mixture is mixed with the raw material carbon to form a mixture, if the mixture is mixed with the raw material carbon to form a mixture. It can be confirmed that the coke strength of (DI(15)) 85 or more can be ensured.

Further, in order to obtain the coke of all the examples and all of the comparative examples, the duration of the generation of the smoke generated when the mixture was charged into the coke oven was investigated, that is, the time of smoking. The measurement results are shown in Tables 3 to 6, and Fig. 5.

As shown in Tables 3 to 6, the smoking time of all the examples was 16 seconds or less. In contrast, Comparative Examples 3-1 to 3-9 have a smoking time of more than 16 seconds. Fig. 5 shows Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9. A graph showing the relationship between the smoking time of 4-1 to 4-5 and the moisture content of the mixture. Further, in Fig. 5, the horizontal dotted line indicates the position where the smoking time is 16 seconds, and the vertical broken line indicates the position where the moisture content is 6%.

As shown in Fig. 5, the smoking phenomenon is such that the smaller the moisture content of the mixture, the longer the time is, and the shorter the moisture content of the mixture, the shorter the time. Specifically, when the moisture content of the mixture is 6% by mass or more, the smoking time is 16 seconds or less. Further, when the amount of water charged in the carbon is less than 6% by mass, the smoking time is remarkably increased.

Industry availability

As described above, according to the present invention, even if the use ratio of the low-quality raw material carbon (non-bonded carbon and non-micro-bonded carbon) is increased, the above-described high-strength coke can be produced at low cost. Therefore, the present invention is highly likely to be utilized in the coke manufacturing industry.

S1. . . Smashing step

S2. . . Raw material carbon pulverization step

S3, S31, S31. . . Mixing step

S4, S41. . . Drying step

S5. . . Moisture adjustment step

S6. . . Dry distillation step "Certificate of deposit confirmation"

x. . . Raw material charcoal

y. . . Crushing bonded filler

z. . . Coke

Fig. 1 is a flow chart for explaining a method for producing a high-strength coke according to an embodiment of the present invention, which is an example of a method for producing high-strength coke according to the present invention.

Fig. 2 is a flow chart for explaining a method for producing high-strength coke according to a third embodiment of the present invention, which is an example of a method for producing high-strength coke.

Fig. 3 is a flow chart for explaining a method for producing high-strength coke according to a fourth embodiment of the present invention, which is an example of a method for producing high-strength coke.

Fig. 4 shows Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9. 4-1 to 4-5, a graph showing the relationship between the coke strength (D(15)), the moisture content of the mixture, and the content of the fine powder particles having a particle diameter of 0.01 mm or more and 0.3 mm or less contained in the pulverized bonded filler.

Fig. 5 shows Examples 1-1 to 1-18, 2-1 to 2-6, and Comparative Examples 1-1 to 1-5, 2-1 to 2-3, and 3-1 to 3-9. A graph showing the relationship between the smoking time of 4-1 to 4-5 and the moisture content of the mixture.

S1. . . Smashing step

S2. . . Raw material carbon pulverization step

S3. . . Mixing step

S4. . . Drying step

S5. . . Moisture adjustment step

S6. . . Dry distillation step "Certificate of deposit confirmation"

x. . . Raw material charcoal

y. . . Crushing bonded filler

z. . . Coke

Claims (6)

A method for producing high-strength coke, comprising the step of pulverizing a solid-bonding filler to form a fine particle having a particle diameter of 50% by mass or more and 100% by mass or less of 0.01 mm or more and 0.3 mm or less a pulverizing and bonding filler of particles; a mixing step of mixing the pulverized bonded filler material and the raw material carbon to prepare a mixture; a dry distillation step of dry distillation of the mixture; and a drying step before the foregoing mixing step, and the foregoing The mixing step is carried out simultaneously, or after the aforementioned mixing step and before the dry distillation step; when the drying step is performed before the mixing step, in the drying step, the raw material carbon is dried to make the mixing step In the case where the water content of the mixture is 0% by mass or more and 8% by mass or less, and the drying step is performed simultaneously with the mixing step, the pulverizing and bonding filler and the raw material carbon are mixed while the drying step is performed. Drying to form the aforementioned mixture having a moisture content of 0% by mass or more and 8% by mass or less, When carried out the drying and pyrolysis step prior to the step after the mixing step, the drying step, the mixture is based the% water content the dried mixture is less than the 0 and 8% by mass or less by mass. A method for producing a high-strength coke, comprising: a pulverization step of pulverizing a solid binder filler to form fine particles having a particle diameter of 30% by mass or more and 100% by mass or less and a particle diameter of 0.01 mm or more and 0.3 mm or less a pulverizing and bonding filler; a mixing step of mixing the pulverized cemented filler material and the raw material carbon to prepare a mixture; a dry distillation step of dry-distilling the mixture; and a drying step of mixing with the foregoing before the mixing step The step is carried out simultaneously, or after the foregoing mixing step and before the dry distillation step; when the drying step is performed before the mixing step, in the drying step, the raw material carbon is dried to be in the foregoing mixing step When the moisture content of the mixture is 0% by mass or more and 7% by mass or less, and the drying step is performed simultaneously with the mixing step, in the drying step, the pulverized cemented filler and the raw material carbon are mixed while being dried. To form the aforementioned mixture having a moisture content of 0% by mass or more and 7% by mass or less, before When carried out the drying and pyrolysis step prior to the step after the mixing step, the drying step, the Department of the moisture content of the dried mixture the mixture is not less than 0 mass% and 7 mass% or less. The method for producing a high-strength coke according to the first or second aspect of the invention, further comprising a water-conditioning step, wherein the moisture content of the mixture is 6% by mass or more after the drying step and before the dry distillation step Add moisture to the way. The method for producing high-strength coke according to claim 1 or 2, wherein in the pulverizing step, a pulverized bonded filler containing 80% by mass or more of particles having a particle diameter of 3 mm or less is formed. The method for producing a high-strength coke according to the first or second aspect of the invention, wherein the raw material carbon contains one or both of non-micro-bonded carbon and non-bonded carbon of 20% by mass or more and 60% by mass or less. The method for producing high-strength coke according to claim 1 or 2, wherein in the drying step, the mixture is heated at a temperature lower than a softening point of the solid bonded filler.