KR20190013150A - Coal briquette composition, coal briquette comprising the same and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a coal briquette composition comprising pulverized coal and a binder. More specifically, the present invention relates to a coal briquette composition characterized in that the binder comprises a cellulose ether and raw starch which are not gelated at 50-97 deg. C, a coal briquette comprising the same, and a method for manufacturing the same. According to the present invention, since the cellulose ether is not thermally gelated during the gelatinization process of the raw starch requiring high temperature conditions, the manufacturing process of mixing the binder and the pulverized coal at a high temperature and molding the mixture can be performed. As a result, a coal briquette excellent in falling strength and compression strength can be provided.

Description

TECHNICAL FIELD The present invention relates to a molded carbon composition, a molded carbon containing the same, and a method of manufacturing the same,

The present invention relates to a molded-on-carbon composition, a method for producing the same, and more particularly, to a method of manufacturing a molded- And to a method of manufacturing the same.

Generally, coal is used as a heat source in various fields such as thermal power plants, steel mills, small households, agricultural or industrial heating boilers. However, when the coal is pulverized coal having a diameter of 8 mm or less, its use is limited due to insufficient combustion and generation of dust. Thus, low grade pulverized coal having a particle size of 8 mm or less, especially 4 mm or less, is used after being processed into a coal briquette of a certain particle size.

In the case of processing low-grade pulverized coal having a small particle size as described above, primarily molasses was used as a binder. For example, Patent Document 1 (Korean Patent Registration No. 10-0568337) discloses a method for producing a sintered body, comprising the steps of: firstly mixing molasses, which is a binder, with pulverized coal, secondarily mixing slaked lime as a hardener to a mixture of pulverized coal and molasses, And a step of molding the molded product into a molded product.

However, since molasses has various problems such as grain supply, quality instability and odor, development of alternative binders has been required, and cellulose ether or starch has been proposed as an alternative binder.

As such a conventional method, Patent Document 2 (Korean Patent Laid-Open Publication No. 10-2016-0010316) discloses a process for producing a cellulose derivative having a viscosity of 1,000 to 80,000 cps, an alkylcellulose, a hydroxyalkylcellulose, and a hydroxyalkylalkylcellulose. Patent Document 3 (Korean Patent Laid-Open Publication No. 10-2017-0068327) discloses a binder for a molding coal containing a cellulose ether compound of at least one kind selected from the group consisting of starch, lignin, an aqueous acid solution, A method for producing pulverized coal from coal is disclosed.

As described in the prior art documents, cellulose ether or starch can be applied individually as a binder for producing pulverized coal from molded coal, but when both of them are used in combination, it is possible to produce shaped coal having even higher strength. However, starch, for example, live powders are maximized in viscosity under high temperature conditions, whereas cellulose ether has a problem of thermal gelation at low temperature to deteriorate adhesion. That is, since temperature conditions at which the adhesive force between the cellulose ether and the raw starch are maximally different are different, it is difficult to maximize the strength of the final molded battery by mixing the raw starch and the cellulose ether.

Accordingly, there is a need for a study on a method for providing a high-strength molded charcoal by mixing a cellulose ether and a raw powder as a binder for a molded shell, and by providing a molded carbon composition capable of reducing the thermal gelation of cellulosic ether .

KR 100568337 B KR 1020160010316 A KR 1020170068327 A

The present invention aims at providing a molded coal composition which can produce a molded coal excellent in falling strength and compressive strength by including a cellulose ether and a raw powder as a binder which are not gelled at 50 to 97 占 폚.

The present invention also provides a method for producing a molded carbon containing the above-mentioned molded carbon composition and a method for producing the same.

In order to solve the above-mentioned problems, the present invention provides a molded carbon composition comprising pulverized coal and a binder, wherein the binder does not gel at 50-97 ° C, and the activated charcoal composition contains the activated charcoal.

The gelation temperature of the cellulose ether may be higher than the gelation temperature of the raw starch.

The cellulose ether may be at least one selected from the group consisting of alkyl cellulose, hydroxyalkyl cellulose, hydroxyalkyl alkyl cellulose and alkyl alkyl hydroxylalkyl cellulose. Hydroxyethyl cellulose (HEC) having a hydroxyethyl substitution degree (MS) of 0.8 or more and 4.0 or less; Hydroxyethyl methyl cellulose (HEMC) having a methyl substitution degree (DS) of more than 0 and 1.3 or less and a hydroxyethyl substitution degree (MS) of 0.8 or more and 4.0 or less; And hydroxypropyl methyl cellulose (HPMC) having a methyl substitution degree (DS) of not less than 0 and not more than 1.0 and a hydroxypropyl substitution degree (MS) of not less than 0.1 and not more than 0.25 may be included. have.

The content of the cellulose ether may be 0.1-1.0 parts by weight based on 100 parts by weight of the pulverized coal, and the content of the raw powder may be 0.1-5.0 parts by weight.

The molding composition according to the present invention may further comprise water. At this time, the water may be in the form of hot water or steam having a temperature between the gelation temperature of the raw starch and the gelation temperature of the cellulose ether.

Further, the present invention provides a method of producing a molded carbon containing the above-described molding composition and a method of manufacturing the same, the method comprising: (1) providing pulverized coal; (2) introducing cellulose ether and non-gelling powders into the pulverized coal at 50 to 97 占 폚 and dry mixing them; (3) wet-mixing the dry mixture obtained according to the step (2) in a temperature environment between the gelation temperature of the raw starch and the gelation temperature of the cellulose ether; (4) mixing the wet mixture obtained in the step (3) in a high temperature environment at a temperature higher than the temperature environment of the step (3); And (5) molding the mixture obtained according to the step (4) to provide a molded charcoal.

The step (3) may be performed by injecting hot water having a temperature between the gelation temperature of the raw powder and the gelation temperature of the cellulose ether, or spraying steam. At this time, the temperature range of the hot water may be 90 to 100 ° C.

The step (4) may be carried out for 5 to 40 minutes under a high temperature environment of 100 to 150 ° C.

According to the present invention, by using a cellulose ether as a binder for a molding coal and a raw starch, a cellulose ether which is not gelled at a gelatinization temperature range of 50 to 97 DEG C of the raw starch is used, It is possible to suppress the thermal gelation of the aqueous cellulose ether solution having viscosity.

Accordingly, it is possible to carry out a manufacturing process of mixing the binder and the pulverized coal at a high temperature and molding them, and as a result, it is possible to provide a molded coal having excellent drop strength and compressive strength.

Hereinafter, the present invention will be described in detail so as to be easily carried out by those skilled in the art.

The present invention relates to a molded coal composition comprising pulverized coal and a binder, a molded coal containing the pulverized coal, and a method for producing the same. The binder includes cellulose ether and a raw powder that are not gelled at 50 to 97 ° C.

As used herein, "pulverized coal" means coal having a particle size of 8 mm or less. In order to reduce the variation in the quality of the briquette, it is preferable that the size of the fine briquettes is small and constant. For example, fine briquettes having a particle size of more than 0 mm and 4 mm or less can be preferably used. Generally, the coal is classified into peat having a carbon content of about 60%, about 70% of atan and lignite, about 70% to 80% of bituminous coal, about 80% to 90% of bituminous coal and 90% do. The type of coal used in the present invention is not particularly limited, and a single type of coal or various types of coal may be mixed and used.

The binder serves to bind the pulverized coal to form the pulverized coal. The binder serves to bind the particles of the pulverized coal to each other. In the present invention, the cellulose ether and the raw powder that do not gel at 50 to 97 ° C are mixed.

As to the principle of manifesting the adhesive force of the binder, the raw starch is first gelled under high temperature conditions, and the viscosity is maximized to exhibit the maximum adhesive force. On the other hand, the cellulose ether exhibits an adhesive force through dissolution. Specifically, the cellulose ether is dissolved in a polar solvent represented by water. During this process, the hydrophilic group contained in the cellulose ether forms a hydrogen bond with the water molecule, and the viscosity is expressed. Thereafter, the water is evaporated and the adhesive force is developed .

However, in the case of a cellulose ether substituted with a hydrophobic group, there is a property that the activity of a hydrophobic group is increased at a high temperature above a certain temperature. When high temperature water or steam above the specific temperature is used as a solvent in the dissolution process for the viscosity expression of cellulose ether, the activity of the hydrophobic group becomes higher than the hydrogen bonding of the hydrophilic group and the water molecule. As a result, the hydrogen bond which is formed in the dissolution process of the cellulose ether is broken and the thermal gelation phenomenon in which the cellulose ether is re-precipitated from the aqueous solution of the cellulose ether is caused, so that the viscosity in the solution state may be lost. At this time, the temperature is referred to as a gel point.

That is, in order to exhibit excellent adhesive strength, high temperature conditions required for gelatinization are indispensable, and accordingly, when the high temperature condition is applied, there arises a problem that the cellulose ether is thermally gelated. Thus, the inventors of the present invention have conducted intensive studies to produce a molded coal having excellent strength by using a cellulose ether and a raw powder as a binder, and as a result, it has been confirmed that it is necessary to control the gelation temperature of the cellulose ether.

Specifically, in the present invention, cellulose ether which does not gel at 50 to 97 占 폚 including the gelatinization temperature range is used. At this time, since the cellulose ether is not usually gelated at less than 50 ° C, the cellulose ether which is not gelated at 50 to 97 ° C is not gelated at the entire temperature range of 97 ° C or less. That is, the "cellulose ether which is not gelated at 50 to 97 ° C" used in the present invention is the same as "cellulose ether having gelation temperature higher than at least 97 ° C".

Preferably, the gelation temperature of the cellulose ether may be higher than the gelation temperature of the raw starch. When cellulose ether having a gelation temperature higher than the above-mentioned gelation temperature is used as a binder for a molding blend by mixing with a bioactive component, thermal gelation of the cellulose ether viscous solution can be inhibited at the same time as progress of gelatinization is promoted, It is possible to provide a briquette having falling and compressive strength.

The cellulose ether is derived from cellulose, which is a vegetable material, and is a kind of cellulose derivative in which the hydroxyl group of cellulose is etherified by using an etherifying agent. Specifically, the cellulose ether is selected from the group consisting of alkyl cellulose, hydroxyalkyl cellulose, hydroxyalkyl alkyl cellulose, and alkyl alkyl hydroxylalkyl cellulose. (MC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), hydroxyethyl methyl cellulose (HPMC), and the like. (HEMC), hydroxypropyl methyl cellulose (HPMC), ethyl hydroxyethyl cellulose (EHEC), and methyl ethyl hydroxyethyl cellulose (MEHEC). Or more can be used.

Preferably, the cellulose ether is hydroxyethyl cellulose (HEC) having a hydroxyethyl substitution degree (MS) of 0.8 or more and 4.0 or less; Hydroxyethyl methyl cellulose (HEMC) having a methyl substitution degree (DS) of more than 0 and 1.3 or less and a hydroxyethyl substitution degree (MS) of 0.8 or more and 4.0 or less; And hydroxypropyl methyl cellulose (HPMC) having a methyl substitution degree (DS) of not less than 0 and not more than 1.0 and a hydroxypropyl substitution degree (MS) of not less than 0.1 and not more than 0.25 may be included. have. The degree of substitution affects the gelation temperature of the cellulose ether. When DS and MS are included in the above ranges, it is possible to provide the cellulose ether which does not gel at 97 DEG C or lower. As a result, Can be produced. Here, the term "degree of substitution" means the average number of hydroxyl groups substituted with an alkyl group or hydroxyalkyl group per anhydroglucose unit.

The raw starch may be one or more selected from the group consisting of rice starch, wheat starch, wheat starch, corn starch, potato starch, sweet potato starch, cassava starch and tapioca starch. The raw starch is usually called? -Starch, and exhibits a fine crystalline state with a regular molecular arrangement. On the other hand, the starch is called? -Starch and shows an amorphous state with an irregular molecular arrangement. The phenomenon that the? -Starch is changed into? -Starch is called "luxury". As described above, the viable powder is maximized in viscosity under high temperature conditions and has the maximum adhesive force in this process. On the other hand, the starch is a starch that has undergone a gelatinization process, that is, a starch past the point where maximum viscosity is expressed. Thus, the starch of starch has a viscosity value lower than that of the live starch. That is, compared to the use of the starch as a binder, the present invention can provide a molded charcoal having a remarkably high strength when the powder is applied to the pulverized coal to produce an adhesive force while being gelled.

The content of the cellulose ether may be 0.1-1.0 parts by weight based on 100 parts by weight of the pulverized coal, and the content of the raw powder may be 0.1-5.0 parts by weight. When the content of the cellulose ether and the raw starch is within the above range, it is preferable to use a small amount of the cellulose ether and the raw starch to obtain a high-strength molded charcoal.

The molding composition according to the present invention may further comprise water and the water may be contained in the form of hot water or steam having a temperature between the gelatinization temperature of the cellulose ether and the gelatinization temperature of the raw starch. As the high-temperature water, distilled water having a temperature between the gelation temperature of the raw powder and the gelation temperature of the cellulose ether may be used, and high-temperature distilled water having a temperature of 90 to 100 ° C may be used. The high-temperature water may be contained in an amount of 50.0 parts by weight or less based on 100 parts by weight of the coal. When the content of the high-temperature water is within the above-mentioned range, it is possible to obtain a molded-on-a-carbon composition having an easy handling and a uniform composition.

In addition, the molding composition according to the present invention may further include an additional binder in an amount of 0 to 10,000 parts by weight based on 100 parts by weight of the cellulose ether. Examples of the additional binder include molasses, starch, modified starch, polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyacrylamide (PAM), sucrose, liquid glucose, acacia gum, tragacanth gum, (PVP), sodium polyacrylate, polyvinyl methyl ether (PLM), alginic acid, asphalt, BITUMEN, CASEIN, epoxy resin, pitch (alginic acid, alginic acid, polymethyl methacrylate, polyvinylpyrrolidone PITCH), polyamide, polyurethane, and polyvinyl acetal may be used.

On the other hand, the present invention provides a briquette containing the above-mentioned briquette composition. The briquette thus provided has a high thermal efficiency and a high drying speed and can be used as a heat source in various fields such as thermal power plants, steel mills, small households, agricultural or industrial heating boilers.

In addition, since the briquettes provided according to the present invention have excellent compressive strength, the rate at which the briquettes are broken due to self-loading in the process of being stacked or transported inside a container having a specific shape such as a storage tank and a melting furnace may be lowered. Since the briquette is excellent in drop strength, the rate of breakage due to causes such as a falling impact during the conveying process using the briquette making process, the conveyor belt, and the large vehicle can be lowered. Accordingly, the occurrence of dust due to the breakage of the molded can is suppressed, and as a result, environmental pollution due to generation of dust can be prevented.

The method for manufacturing a briquette according to the present invention comprises the steps of: (1) providing pulverized coal; (2) introducing cellulose ether and non-gelling powders into the pulverized coal at 50 to 97 占 폚 and dry mixing them; (3) wet-mixing the dry mixture obtained according to the step (2) in a temperature environment between the gelation temperature of the raw starch and the gelation temperature of the cellulose ether; (4) mixing the wet mixture obtained in the step (3) in a high temperature environment at a temperature higher than the temperature environment of the step (3); And (5) molding the mixture obtained according to the step (4) to provide a molded charcoal.

Hereinafter, a method of manufacturing a briquette according to an embodiment of the present invention will be described step by step.

(1) Powdered coal providing step

This step is to provide pulverized coal. As the pulverized coal, raw materials containing carbon such as peat, argon, lignite, bituminous coal, bituminous coal and anthracite can be used without limitation. The particle size of the pulverized coal may be 8 mm or less, for example, 0 mm or more and 4 mm or less. At this time, the pulverized coal may be pulverized or pulverized according to a conventional method, or pulverized pulverized coal may be purchased and used.

(2) Dry mixing step

In this step, the pulverized coal is charged with cellulose ether and non-gelling powders which are not gelled at 50 to 97 占 폚, followed by dry mixing. At this time, the individual characteristics such as the type and content of the cellulose ether and the raw starch are as described above.

At this stage, the pulverized coal, the cellulose ether and the raw powders are mixed in the form of solid phase powder, and then stored and transported in a dry mixture state, and then mixed with water at the final use stage. Accordingly, it becomes possible to downsize and simplify the storage facility and to simplify the transportation facility. Furthermore, there is no need to worry about freezing in winter.

(3) wet mixing step

This step is a step of wet mixing the dry mixture obtained according to the step (2) in a temperature environment between the gelation temperature of the raw starch and the gelation temperature of the cellulose ether. Such a wet mixing step may be carried out in such a manner that high temperature water having a temperature between the gelation temperature of the raw powder and the gelation temperature of the cellulose ether is injected or steam is injected and preferably the high temperature water is injected .

For example, when the high-temperature water injection method is used, the high-temperature water may be enriched with the high-temperature water, so that the viscosity can be maximized, and the cellulose ether is dissolved in the high-temperature water. Therefore, the temperature of the high-temperature water should be higher than the gelatinization temperature for gelatinization of the viable powder and lower than the gelation temperature for suppressing thermal gelation of the cellulose ether. In order to satisfy such a condition, the temperature range of the hot water may preferably be 90 to 100 ° C. As described above, when high temperature water having a temperature between the gelation temperature of the raw powder and the gelation temperature of the cellulose ether is used, the hydrogen bond formed between the hydrophilic group and the water molecule is stronger than the activity of the hydrophobic group contained in the cellulose ether, It is possible to provide a molded body having excellent drop strength and compressive strength since it can be vitrified without thermal gelation caused by breaking of the bond.

(4) High temperature mixing step

This step is a step of mixing the wet mixture obtained according to the step (3) in a high temperature environment at a temperature higher than the temperature environment of the step (3).

Specifically, this step is a step for sufficiently progressing the living process of the living body to be performed in the above (3) wet mixing step, and a conventional kneader can be used without limitation. Through such a high-temperature mixing process, the viable powder is sufficiently enriched to exhibit the maximum viscosity, thereby exhibiting the highest adhesive force.

The high-temperature mixing step may be performed at a temperature ranging from 100 to 150 ° C for 5 to 40 minutes, and as a result, the strength of the briquette produced in the subsequent process can be greatly improved.

(5) Forming step

This step is a step of molding the mixture obtained according to the step (4) to provide a molded charcoal. The briquettes can be produced by a known method, for example, by injecting a composition for forming a briquette into a mold, pressurizing the mixture at a constant pressure, and then drying.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these embodiments.

Example 1

(Production of molded-in composition)

First, 100 parts by weight of pulverized coal (particle size: 0.1 to 5 mm, manufactured by Kolon) was prepared. Subsequently, 0.5 parts by weight and 2.5 parts by weight of cellulose ether as a binder and 2.5 parts by weight as a binder were added to the pulverized coal, and the mixture was mixed in an IRRICH (R-02) mixer for 40 seconds to obtain a dry mixture. As the cellulose ether, hydroxyethyl methyl cellulose (HEMC) having a degree of methyl substitution (DS) of 0.92 and a degree of hydroxyethyl substitution (MS) of 1.01 was used as the cellulosic ether, Respectively. The gelation temperature of the HEMC 2.0 wt% aqueous solution was measured by a Rheometer (Advanced Rheometer 2000), and the gelation did not occur at a temperature range of 50 to 97 ° C.

17 parts by weight of distilled water at 95 캜 was added to the dry mixture, followed by mixing with the same Irrigation mixer (EIRICH, R-02) for 3 minutes to obtain a wet mixture.

The wet mixture was further mixed with a kneader (OPEN KNEADER) at a high temperature of 120 ° C for 15 minutes to prepare a molded carbon composition.

(Production of Molded Carbon)

Using the briquetting machine (JEI SANKI, JCB250T), the above-mentioned molded carbon composition was shaped into an elliptical shape having a size of 51 mm x 38.2 mm x 24 mm thick.

Examples 2 to 5 and Comparative Examples 1 to 5

The molded granules were prepared in the same manner as in Example 1, except that the kind, content, degree of substitution, gelation temperature, type and content of starch used were adjusted as shown in Table 1 below. In Table 1 below, the gelation temperature of the cellulose ether was measured with a rheometer (Advanced Rheometer 2000), and the value was measured with respect to cellulose ether in a 2.0 wt% aqueous solution. In the following Table 1, N / D indicates that the gelation did not occur in the temperature range of 50 to 97 占 폚.

Live meal Luxurious starch
(Parts by weight) Cellulose ether content
(Parts by weight) Luxury temperature
(° C) content
(Parts by weight) Kinds DS MS Gelation temperature
(° C) Example 1 2.5 75 - 0.5 HEMC 0.92 1.01 N / D Example 2 2.5 75 - 0.5 HEMC 1.29 1.13 N / D Example 3 2.5 75 - 0.5 HEMC 1.11 0.81 N / D Example 4 2.5 75 - 0.5 HEC 0 2.50 N / D Example 5 2.5 75 - 0.5 HEC 0 2.98 N / D Comparative Example 1 2.5 75 - 0.5 HEMC 1.35 0.22 80 Comparative Example 2 2.5 75 - 0.5 HEMC 1.24 0.79 90 Comparative Example 3 2.5 75 - 0.5 HEMC 1.31 2.21 94 Comparative Example 4 2.5 75 - 0.5 HEC 0 0.73 95 Comparative Example 5 - 2.5 0.5 HEMC 0.92 1.01 N / D

* HEMC: Lotte Fine Chemicals ㈜, MECELLOSE ^® CB-P039

* HEC: Lotte Fine Chemicals Co., Ltd., HECELLOSE ^® H100K

Ingredients: Ingredion, corn starch

* Starch Starch: Ingredion, Ecostar

<Evaluation method>

1. Drop strength (wt%)

The briquettes prepared according to Examples 1 to 5 and Comparative Examples 1 to 5 were dried in an oven at 120 ° C for 2 hours, and then 10 of the dried briquettes were freely dropped 20 times at a height of 160 cm. Subsequently, the fallen matter was sieved with a sieve having a width of X-length of 5 mm each, and the weight of the remaining residue was measured. The fallen weight was calculated as a percentage with respect to the weight of the briquette before falling, Respectively. At this time, the larger the value obtained, the greater the drop strength. The drop strength is a criterion for determining the loss rate due to dropping when falling into a conveyor belt or a large vehicle during the molding process or the transfer process.

2. Compressive strength (kg / cm ² )

The compressive strengths of the briquettes immediately after molding as prepared in Examples 1 to 5 and Comparative Examples 1 to 5 were measured using a compressive strength tester (FA-B500, manufactured by JEOL CHEMICAL CO., LTD.). The compressive strength serves as a criterion for judging the rate at which the briquette is broken by its own load in the process of being laminated or transported inside a container having a specific shape such as a storage tank and a melting furnace.

Drop strength (wt%) Compressive strength (kgf / cm ² ) Example 1 85.1 18.3 Example 2 82.7 17.7 Example 3 83.4 17.5 Example 4 84.3 19.2 Example 5 83.9 18.7 Comparative Example 1 53.7 8.2 Comparative Example 2 67.8 9.8 Comparative Example 3 70.9 10.1 Comparative Example 4 72.2 10.7 Comparative Example 5 78.2 15.4

As shown in Table 2, in the case of the molded cells produced according to Examples 1 to 5 including the cellulose ether and the raw starch which were not gelled at 50 to 97 ° C, It can be confirmed that the compression strength is excellent. In contrast, in the case of the molded charcoal produced according to Comparative Example 5 using the starch, the strength was lower than that of the molded charcoal of Examples 1 to 5, even though cellulose ether which was not gelled at 50 to 97 ° C was used, It can be seen that the viscosity is maximized and the best adhesion is exhibited during the process, and the strength of the final molded charcoal is maximized.

On the other hand, as described above, "cellulose ether which is not gelated at a temperature of 50 to 97 ° C" represents "cellulose ether having gelation temperature higher than 97 ° C". According to the present invention, cellulose ether having a gelation temperature higher than 97 占 폚, live meal having a gelatinization temperature lower than the gelation temperature (75 占 폚), and high temperature water having a temperature between the gelatinization temperature and the gelatinization temperature ), The gelation of the aqueous solution of the cellulose ether can be suppressed while the gelatinization of the raw starch is promoted, and consequently, the molded carbon having the drop strength and the compressive strength can be provided.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiment, but is to be accorded the widest scope consistent with the appended claims and their equivalents. Should be construed as being included in the scope of the present invention.

Claims (12)

A molded coal composition comprising pulverized coal and a binder,
Wherein the binder comprises a cellulose ether which is not gelled at 50 to &lt; RTI ID = 0.0 &gt; 97 C &lt; / RTI &gt; The method according to claim 1,
Wherein the gelation temperature of the cellulose ether is higher than the gelation temperature of the raw starch. The method according to claim 1,
The cellulose ether may be at least one selected from the group consisting of alkyl cellulose, hydroxyalkyl cellulose, hydroxyalkyl alkyl cellulose and alkyl alkyl hydroxylalkyl cellulose. Wherein the molding composition comprises: The method according to claim 1,
The cellulose ether is hydroxyethyl cellulose (HEC) having a hydroxyethyl substitution degree (MS) of 0.8 or more and 4.0 or less; Hydroxyethyl methyl cellulose (HEMC) having a methyl substitution degree (DS) of more than 0 and 1.3 or less and a hydroxyethyl substitution degree (MS) of 0.8 or more and 4.0 or less; And hydroxypropyl methyl cellulose (HPMC) having a methyl substitution degree (DS) of not less than 0 and not more than 1.0 and a hydroxypropyl substitution degree (MS) of not less than 0.1 and not more than 0.25 &Lt; / RTI &gt; The method according to claim 1,
Wherein the content of the cellulose ether is 0.1-1.0 parts by weight based on 100 parts by weight of the pulverized coal, and the content of the raw powder is 0.1-5.0 parts by weight. The method according to claim 1,
Wherein the molded coal composition further comprises water. The method according to claim 6,
Wherein the water is contained in the form of hot water or steam having a temperature between the gelation temperature of the raw starch and the gelation temperature of the cellulose ether. 8. A molding composition comprising the molding composition according to any one of claims 1 to 7. 9. A method of producing a molded coal according to claim 8,
(1) providing pulverized coal;
(2) introducing cellulose ether and non-gelling powders into the pulverized coal at 50 to 97 占 폚 and dry mixing them;
(3) wet-mixing the dry mixture obtained according to the step (2) in a temperature environment between the gelation temperature of the raw starch and the gelation temperature of the cellulose ether;
(4) mixing the wet mixture obtained in the step (3) in a high temperature environment at a temperature higher than the temperature environment of the step (3); And
(5) molding the mixture obtained in the step (4) to provide a molded carbon. 10. The method of claim 9,
Wherein the step (3) is carried out by injecting hot water having a temperature between the gelation temperature of the raw powder and the gelation temperature of the cellulose ether, or injecting steam. 11. The method of claim 10,
Wherein the temperature of the high-temperature water is in the range of 90 to 100 ° C. 10. The method of claim 9,
Wherein the step (4) is performed for 5 to 40 minutes under a high-temperature environment of 100 to 150 ° C.