KR102147290B1 - Method and apparatus for manufacturing of molded body - Google Patents

Abstract

The present invention relates to a method and an apparatus for producing a molded article.
A method for manufacturing a molded body according to an embodiment of the present invention includes the steps of: drying some of the raw coal to prepare a dried raw coal, and collecting the dry pulverized coal scattered during this process; Mixing dry pulverized coal and a binder to prepare mixed coal; Heating the mixed coal; And forming a molded body by molding the heated mixed coal.

Description

Molded body manufacturing method and manufacturing apparatus {METHOD AND APPARATUS FOR MANUFACTURING OF MOLDED BODY}

The present invention relates to a method and an apparatus for manufacturing a molded article. More specifically, it relates to a method and an apparatus for manufacturing a compact obtained by compacting dry pulverized coal generated in the drying process of raw coal for coke production.

The most common blast furnace construction method among the molten iron manufacturing methods is to construct a high packed bed of 10 m or more, and uses high-strength sintered ore as a raw material, and high-strength coke using coking coal as a reducing agent, and pulverized coal as an auxiliary fuel. Blow in. The role of coke in blast furnace operation is very important because the cold and hot strength of coke affects the ventilation and liquid permeability of the furnace, and the representative indexes representing operating efficiency, such as starting cost, fuel cost, and gas utilization rate, are determined.

Accordingly, various technologies for increasing the quality of coke are being developed. The main technology development directions include a method through coal blending, a method using additives that can maximize caking properties, and a method of increasing the charging density using a pretreatment facility. Among these, if the moisture of charged coal is dried to a level of 4 to 7% by weight using CMCP, which is a coal drying facility, and charged into a coke oven, it is possible to increase the quality of coke by improving the charging density.

However, it is difficult to treat the pulverized coal generated by floating while drying a large amount of coal. Specifically, since the moisture of the dry pulverized coal is 2% by weight or less and the average particle size is 100 μm or less, it is difficult to directly charge the dry pulverized coal into the coke oven due to the generation of scattering dust between transports, which causes environmental problems. As a solution to this, a method of compacting and charging dry pulverized coal is being applied, but it is essential to use an appropriate binder in order to secure quality for preventing differentiation during transport and charging.

There are a wide variety of binders available for compacting dry pulverized coal. However, depending on the type of binder, the method of use is different, and thus a process or equipment configuration is required. In order to reduce the burden of the coke manufacturing cost, the compacting process and the amount of the binder should be minimized as much as possible.

A method of using molasses and quicklime has been proposed for the binder and application method applicable to compacting dry pulverized coal, but it is difficult to apply because the hot strength of coke occurs due to alkali components and quicklime present in molasses.

In addition, a method of using a polymer resin as a binder has been proposed, but as described above, it is difficult to apply due to the high generation rate of powder when charged into the coke oven after compaction. In addition, a method of utilizing tar, pitch, and petroleum pitch has been proposed. However, it is not possible to secure proper quality, and at the same time, it is a material that is harmful to the human body, so the work environment is poor.

The present invention is to provide a method and a manufacturing apparatus for manufacturing a molded article. More specifically, it is intended to provide a method and a manufacturing apparatus for manufacturing a molded body obtained by compacting dry pulverized coal generated in the drying process of raw coal for coke manufacturing.

A method for manufacturing a molded body according to an embodiment of the present invention includes the steps of: drying some of the raw coal to prepare a dried raw coal, and collecting the dry pulverized coal scattered during this process; Mixing dry pulverized coal and a binder to prepare mixed coal; Heating the mixed coal; And forming a molded body by molding the heated mixed coal.

In the step of manufacturing the mixed coal, the remaining raw coal is further mixed, and the dry pulverized coal may be 50 to 100 parts by weight based on 100 parts by weight of the sum of the remaining raw coal and the dry pulverized coal.

The remaining raw coal may contain 5 to 15% by weight of moisture.

The dry pulverized coal may contain 2% by weight or less of moisture.

In the step of manufacturing the mixed coal, the mixed coal may contain 5 to 15% by weight of moisture.

In the step of manufacturing the mixed coal, the binder may be 5 parts by weight or less (excluding 0 parts by weight) based on 100 parts by weight of the sum of the remaining raw coal and the dry pulverized coal.

The binder may include starch based on any one of wheat, corn, potato, sweet potato, and cassava.

The binder may include alpha starch or beta starch.

The binder may contain 60 to 100% by weight of starch.

The step of preparing the mixed coal may be mixing through high-speed stirring.

In the step of heating the mixed coal, the temperature of the mixed coal may be 45 to 90 °C.

Heating the mixed coal may include supplying steam to the mixed coal.

The step of manufacturing the molded body may be molding with a double-roll molding machine.

An apparatus for manufacturing a molded body according to an embodiment of the present invention includes a raw coal storage bin; A dryer for drying some of the raw coal stored in the raw coal storage bin; A collecting device for collecting dry pulverized coal scattering in the dryer; A dry pulverized coal storage bin for storing the dried pulverized coal collected by the collecting device; Binder storage bin; A mixing facility for manufacturing mixed coal by receiving and mixing dry pulverized coal and a binder from the dry pulverized coal storage bin and the binder storage bin; A heating device that receives and heats the mixed coal from the mixing facility; And a molding machine for receiving and molding the mixed coal heated from the heating device.

The mixing facility may be to manufacture mixed coal by receiving and mixing the raw coal from the raw coal storage bin.

The heating device has a steam supply pipe connected, and can heat the mixed coal by receiving steam from the steam supply pipe.

The heating device can be vertical or horizontal.

The molding machine may be in the form of a double roll.

According to an embodiment of the present invention, the function of the binder used to secure the strength of the molded article is expressed, so that differentiation does not occur when the molded article is transported and charged after compacting. Therefore, it is possible to secure the strength of the molded body at a level that can be loaded into the coke oven.

That is, by heating the mixed coal in which the dry pulverized coal and the binder are mixed to produce a molded article, the strength of the molded article is secured, so that it can be charged into a coke oven, the loading density is improved, and the coke quality improvement effect can be expected.

1 is a schematic flowchart of a method for manufacturing a molded body according to an embodiment of the present invention.
2 is a schematic view of an apparatus for manufacturing a molded body according to an embodiment of the present invention.

In this specification, terms such as first, second and third are used to describe various parts, components, regions, layers and/or sections, but are not limited thereto. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, a first part, component, region, layer or section described below may be referred to as a second part, component, region, layer or section without departing from the scope of the present invention.

In the present specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

In this specification, the terminology used is only for referring to specific embodiments, and is not intended to limit the invention. Singular forms as used herein also include plural forms unless the phrases clearly indicate the opposite. The meaning of “comprising” as used in the specification specifies a specific characteristic, region, integer, step, action, element and/or component, and the presence of another characteristic, region, integer, step, action, element and/or component, or It does not exclude additions.

In the present specification, the term "combination of these" included in the expression of the Makushi format refers to one or more mixtures or combinations selected from the group consisting of components described in the expression of the Makushi format, and the components It means to include one or more selected from the group consisting of.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein, but is only defined by the scope of the claims to be described later.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein, but is only defined by the scope of the claims to be described later.

1 is a flow chart sequentially showing a method for manufacturing a molded body according to an embodiment of the present invention.

As shown in FIG. 1, a method for manufacturing a molded body according to an embodiment of the present invention includes the steps of drying some of the raw coal to prepare the dried raw coal, and collecting the dry pulverized coal scattered during this process (S10); Mixing dry pulverized coal and a binder to prepare a mixed coal (S20); Heating the mixed coal (S30); And molding the heated mixed coal (S40). In addition, the method for manufacturing a molded body according to an embodiment of the present invention may further include additional processes in addition to the suggested processes as needed.

First, the step (S10) is a step of drying some of the raw coal to prepare the dried raw coal, and collecting the dry pulverized coal scattered during this process. The reasons for collecting dry pulverized coal are as follows. There is a method of increasing the charging density using a pretreatment facility for the purpose of increasing the quality of coke. As one of the pretreatment facilities, there is a coal drying facility. When the raw coal is dried and the dried raw coal is charged into the coke oven, the purpose of increasing the quality of coke by improving the charging density can be achieved. The charged raw coal in the coal drying facility may be dried at a moisture level of 4 to 7% by weight. At this time, during the drying process of the raw coal, a dry pulverized coal having a moisture content of 2% by weight or less and an average particle size of 100 μm or less is generated. Dried pulverized coal generates scattering dust between transports, which causes environmental problems, so it is difficult to directly load it into a coke oven. Accordingly, it is an object of the present invention to collect dry pulverized coal to form a compacted and non-differentiated molded body that can be charged into a coke oven. Therefore, in step S10, such dry pulverized coal is collected.

Next, step S20 is a step of mixing the collected dry pulverized coal and a binder to prepare a mixed coal. At this time, the remaining raw coal may be further mixed to prepare a mixed coal.

Here, the remaining raw coal refers to the remaining raw coal, that is, undried raw coal, except for some of the raw coal dried in the step of collecting the dry pulverized coal.

In addition, the dry pulverized coal may be 50 to 100 parts by weight based on 100 parts by weight of the sum of the remaining raw coal and the dry pulverized coal. Accordingly, with respect to the sum of 100 parts by weight of the remaining raw coal and the dry pulverized coal, the remaining raw coal may be 0 to 50 parts by weight. If there are too many raw coals, the moisture content increases and flowability deteriorates, causing clogging in the process.

In addition, the undried raw coal may contain 5 to 15% by weight of moisture. The dry pulverized coal may contain 2% by weight or less of moisture. If the moisture content of the raw coal is too high, it will cause adhesion in the process equipment, making continuous operation difficult, and if it is too low, it will cause environmental problems as well as decrease the strength of the molded body due to dispersion and scattering.

In step (S20), it is possible to add more water to express the binding function. In this case, the mixed coal may contain 5 to 15% by weight of moisture. If the moisture content in the mixed coal is too high, the adhesion becomes large and clogging occurs in the process equipment, and if it is too small, the binding function is not expressed because the moisture required for the starch gelatinization reaction is low.

In step S20, the binder may be 5 parts by weight or less based on 100 parts by weight of the sum of the remaining raw coal and dry pulverized coal. If the content of the binder is too high, the adhesion becomes large and clogging occurs in the process, and a molded article containing a large amount of the binder is charged, thereby deteriorating the quality of the manufactured coke.

The binder may include starch based on any one of wheat, corn, potato, sweet potato, and cassava.

Starch is a kind of carbohydrate extracted from nature, and is a natural polymer in which several glucoses are bound by glucoside bonds. Starch is present in the form of granules for energy storage in all green plants, and is found in corn, cassava, wheat, potatoes, and rice. Starch is composed of two components: amylose and amylopectin. Both are polysaccharides, and glucose is bound in a straight chain and spiral form, and amylopectin is a branched form of glucose. Although the ratio of the two is different depending on the type of plant, starch is usually composed of 20 to 30% amylose and 70 to 80% amylopectin. The starch particle structure was shown, in which a crystalline region structure in which amylopectin chains are regularly arranged and an amorphous region structure in which amylose chains are irregularly dispersed are sequentially intersected.

Meanwhile, the binder may include alpha starch or beta starch.

Alpha starch can be described as follows. Starch does not dissolve in cold water, but it dissolves in a gel form in hot water and becomes a paste. Dissolving does not simply dissolve like sugar or salt, but undergoes a more complicated process of alpha (α) or gelatinization. Starch originally had a semi-crystalline structure. However, when starch is put in hot water, water penetrates through the starch particles, causing the starch particles to swell, eventually destroying the semi-crystalline structure of the starch. At this time, the trapped amylose molecules escape from the starch particles, and as these amylose molecules are connected to each other, the viscosity of the starch solution increases and becomes sticky like glue. This is a reaction called gelatinization or gelatinization. In general, the higher the amylose content, the easier it is to gelatinize to become a paste. The starch that has undergone this process is called alpha starch, and more specifically, it is called pregelatinized alpha starch.

Beta-starch refers to a starch having a solid crystal structure, consisting of a bundle of components amylose and amylopectin, which are relatively regularly arranged, like natural raw starch particles. If alpha starch is left as it is, it has a property to return to beta starch, and this is sometimes referred to as aging of starch.

In the case of alpha starch, quality such as compressive strength and drop strength of the molded body can be secured without a separate heating process (step S30). However, the addition of the heating process (step S30) increases the level of quality assurance.

On the other hand, in the case of beta starch, it is difficult to secure the quality of the molded body without a separate heating process (step S30), but by adding a heating process (step S30), quality can be secured.

In the case of beta starch, unlike alpha starch, it does not dissolve in water at room temperature, so it can be uniformly mixed when mixing. In the case of alpha starch, on the other hand, since alpha starch has a property of soluble in water at room temperature, pseudo particles (lumps) are partially generated after mixing due to viscous expression, resulting in non-uniform mixing and deteriorating the efficiency of using the binder.

Meanwhile, the binder may have a starch content of 60 to 100% by weight. More specifically, the starch content may be 60 to 100% by weight on a dry basis. If the starch content is too small, the mixture cannot be sufficiently bonded, and the strength of the molded body and the quality of the coke containing the molded body are deteriorated due to the influence of impurities.

In addition, the binder may be provided in a powder state. If a powdery binder is used, the flowability of the raw coal, dry pulverized coal and the binder mixture is improved, and a uniform molded body can be manufactured. In addition, the powdery binder is easy to store and transport by minimizing its volume, and there is no need to worry about freezing in winter.

In contrast, when a liquid binder is used, the flowability of the binder, raw coal, and dry pulverized coal mixture decreases due to the high moisture content, resulting in adhesion phenomenon in the process of manufacturing the molded body, and the mixture is uneven in the molding machine. In some cases, a phenomenon in which the strength and shape of the molded body are uneven due to the occurrence of the charging phenomenon occurs. In addition, since the thus manufactured molded article has a high moisture content, a drying process must be additionally performed to secure the strength of the molded article, which increases the overall process time and cost, and sometimes lowers the process efficiency. In addition, the liquid binder is difficult to maintain uniformly due to layer separation, and because it freezes in winter, storage is not easy.

In step S20, mixing may be mixed through high-speed stirring. Uniform mixing becomes possible when high-speed stirring is used. Specifically, high-speed stirring refers to a method in which a mixing container and at least one rotor in the mixing container are installed, and the mixing container and the rotor rotate in the forward or reverse direction, respectively, to mix. And, the rotational speed of the mixing container may be 3rpm or more and 10rpm or less, and the rotor in the mixing container may be 100rpm or more and 400rpm or less. More specifically, the rotational speed of the mixing container may be 6rpm or more and 8rpm or less, and the rotor in the mixing container may be 200rpm or more and 350rpm or less.

Next, step S30 is a step of heating the mixed coal. For heating the mixed coal, a heating device in which a fluid heated to an appropriate temperature is circulated may be used. If there is no step of heating the mixed coal, since the binder contacts the surface moisture of the coal and lacks the heat required to develop adhesion, even if the binder is used, the strength of the molded body is not secured. On the other hand, if there is a step (S30) of heating the mixed coal, the adhesiveness of the mixed coal is expressed, and a high-strength molded body can be manufactured.

In step S30, the temperature of the mixed coal may be 45 to 90 °C by heating the mixed coal. If the temperature is too high, the mixed coal is excessively dried, and if the temperature is too low, the starch cannot be gelatinized.

Step S30 may include supplying steam to the mixed coal. When the mixed coal is heated using steam supply, the temperature of the mixed coal can be uniformly adjusted as a whole.

Next, step S40 is a step of molding the heated mixed coal. At this time, the molding can be carried out with a double-roll molding machine.

The molded body manufactured through the step (S40) is returned to the step (S10), dried together with the raw coal through a dryer, and then supplied to a coke oven together with the raw coal to be manufactured into coke. For the production of coke, a general method can be used, and a detailed description is omitted.

2 is a schematic view of an apparatus for manufacturing a molded body according to an embodiment of the present invention. The structure of the molded article manufacturing apparatus 100 of FIG. 2 is for illustrative purposes only, and the present invention is not limited thereto. Accordingly, the molded article manufacturing apparatus 100 of FIG. 2 may be modified in various forms.

As shown in Figure 2, the molded body manufacturing apparatus 100 of Figure 2 includes a raw coal storage bin 10; A dryer 20 for drying some of the raw coal stored in the raw coal storage bin; A collecting device 21 for collecting dry pulverized coal scattering in the dryer; A dry pulverized coal storage bin 30 for storing the collected dry pulverized coal; A binder storage bin 40; A mixing facility 50 for producing mixed coal by mixing dry pulverized coal and a binder; Mixed coal heating device 60; And a heated mixed coal molding machine 70. In addition, other devices may be included as necessary.

The raw coal storage bin 10 may include a facility in which raw coal is stored so as to be quantitatively mixed later, and a quantity can be cut out. Some of the raw coal in the raw coal storage bin 10 is charged to the dryer 20 and dried. At this time, scattering of dry pulverized coal may be generated, and the dry pulverized coal collecting device 21 collects it.

The dry pulverized coal collecting device 21 may be used without limitation as long as it is a device capable of separating and collecting the scattered dry pulverized coal from exhaust gas. In FIG. 2, it is shown that the collecting device 21 is installed outside the dryer 20, but is not limited thereto, and may be installed inside the dryer 20.

The dry pulverized coal collected from the dry pulverized coal collecting device 21 is stored in the dry pulverized coal storage bin 30. Likewise, the dry pulverized coal storage bin 30 may also include a facility in which dry pulverized coal is stored so that the subsequent mixing is quantitative, and the quantity can be cut out.

On the other hand, the binder storage bin 40 may include a facility in which a binder is stored so as to be quantitatively mixed later, and a quantity can be cut out.

In the mixing facility 50, dry pulverized coal and a binder are supplied from the dry pulverized coal storage bin 30 and the binder storage bin 40 and are mixed. In the mixing facility 50, the dry pulverized coal and the binder may be uniformly mixed, thereby producing mixed coal. At this time, in the mixing facility 50, the remaining raw coal may be further supplied from the raw coal storage bin 10 and mixed.

The heating device 60 receives the mixed coal from the mixing facility 50 and heats it. The heating device 60 may be connected to a steam supply pipe, and may receive steam from the steam supply pipe to heat the mixed coal. Further, the heating device may be of a vertical type or a horizontal type.

The molding machine 70 receives the heated mixed coal and molds it. The molding machine 70 may be in the form of a double roll.

Hereinafter, examples and comparative examples of the present invention will be described. However, the following examples are only examples of the present invention, and the present invention is not limited to the following examples.

Comparative Example 1 (No binder, no heating step)

85% by weight of dry pulverized coal and 15% by weight of water were mixed to prepare a molded article at room temperature without adding a binder and without heating.

Comparative Example 2 (1% by weight of alpha starch, without heating step)

85% by weight of dry pulverized coal and 15% by weight of water for the expression of the binding function were mixed, and an additional 1% by weight of alpha starch was added to prepare a molded article at room temperature without heating.

Comparative Example 3 (alpha starch 2% by weight, without heating step)

By mixing 85% by weight of dry pulverized coal and 15% by weight of water for the expression of the binding function, an additional 2% by weight of alpha starch was added to prepare a molded article at room temperature without heating.

Table 1 shows the results of measuring the compressive strength and drop strength of the molded articles of Comparative Examples 1 to 3 after a specific time.

The compressive strength was measured by measuring the maximum load until fracture by fixing 30 molded articles prepared in Comparative Examples 1 to 3 at the lower part and pressing at a constant speed from the upper part, and an average value was displayed.

The drop strength was expressed as a percentage of the weight of the total molded body by dropping the molded bodies prepared in Comparative Examples 1 to 3 4 times from 5 m above the ground and maintaining the shape with a particle size of 10 mm or more.

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Compressive strength (kgf/p) 6.3 7.2 8.9 Drop strength (%) 36.5 57.6 64.0 Mixed coal temperature before molding (℃) 23.2 23.4 22.7

Example 1 (1% by weight of alpha starch, including heating step)

By mixing 85% by weight of dry pulverized coal and 15% by weight of water for the expression of the binding function, an additional 1% by weight of alpha starch is added. After staying and heating to an appropriate temperature or higher, a molded body was manufactured.

Example 2 (alpha starch 2% by weight, including heating step)

By mixing 85% by weight of dry pulverized coal and 15% by weight of water for the expression of the binding function, an additional 2% by weight of alpha starch is added, and a mixed coal heating device in which the fluid heated to 150 ℃ circulates is used for 5 minutes. After staying and heating to an appropriate temperature or higher, a molded body was manufactured.

Example 3 (1% by weight of beta starch, including heating step)

Mix 85% by weight of dry pulverized coal and 15% by weight of water for binding function, and add 1% by weight of beta starch to use a mixed coal heating device in which the fluid heated to 150℃ circulates for 10 minutes. It was retained for a while and heated above a temperature at which beta starch can gelatinize, and then a molded article was prepared.

Example 4 (beta starch 2% by weight, including heating step)

Mixing 85% by weight of dry pulverized coal and 15% by weight of moisture for the expression of binding function, and adding 2% by weight of beta starch, using a mixed coal heating device in which the fluid heated to 150 ℃ circulates for 10 minutes It was retained for a while and heated above a temperature at which beta starch can gelatinize, and then a molded article was prepared.

Table 2 shows the results of measuring the compressive strength and drop strength of the molded articles of Examples 1 to 4 after a specific time.

The evaluation method of compressive strength and drop strength is the same as that of the comparative example.

division Example 1 Example 2 Example 3 Example 4 Compressive strength (kgf/p) 18.9 21.0 17.5 22.3 Drop strength (%) 80.0 92.0 80.7 91.8 Mixed coal temperature before molding (℃) 48.3 50.1 75.2 75.2

As shown in Table 1, as a result of Comparative Examples 1 to 3, even if alpha starch is used, the strength of the molded body is secured even if a binder is used because the alpha starch contacts the surface moisture of the coal and lacks the heat required to develop adhesion. It can be seen that it does not. In more detail, empirically, it is necessary to secure a compressive strength of 15 kgf and a dropping strength of 75% or more to minimize the differentiation between transfers for charging. It is difficult to expect a quality improvement effect.

On the other hand, as shown in Examples 1 and 2 of Table 2, it can be seen that the temperature of the mixed coal before molding was secured at 45°C or higher by using the heating device, and thus, the compressive strength of 15 kgf or more and the falling strength of 80% or more have. If not heated, the target strength could not be achieved even under the condition of 2% by weight of the binder, but it can be seen that the target strength can be secured even under the condition of 1% by weight of the binder.

In addition, as shown in Examples 3 and 4 of Table 2, even when using non-pregelatinized beta starch, it is possible to secure the same level of strength as using alpha starch under a temperature condition capable of gelatinizing starch. Through this, it can be seen that by using beta starch instead of alpha starch, it is possible to reduce the cost of manufacturing the molded body due to the difference in the unit cost of the starch itself, and eventually relieve the burden of manufacturing cost of coke.

The present invention is not limited to the above embodiments, but may be manufactured in a variety of different forms, and those of ordinary skill in the art to which the present invention pertains, other specific forms without changing the technical spirit or essential features of the present invention. It will be appreciated that it can be implemented with. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects.

10: raw coal storage bin 20: raw coal dryer
21: dry pulverized coal collector 30: dry pulverized coal storage bin
40: binder storage bin 50: mixing facility
60: heating device 70: molding machine
100: molded article manufacturing apparatus

Claims (18)

Drying some of the raw coal to prepare the dried raw coal, and collecting the dry pulverized coal scattered during this process;
Preparing mixed coal by mixing the dry pulverized coal and a binder;
Heating the mixed coal; And
Forming a molded body by molding the heated mixed coal;
Including,
In the step of preparing the mixed coal;
The mixed coal contains 5 to 15% by weight of moisture,
With respect to the sum of 100 parts by weight of the dry pulverized coal and moisture, the binder is 2 parts by weight or less (excluding 0 parts by weight).
The method of claim 1,
In the step of preparing the mixed coal;
Mix the remaining coke more,
With respect to the sum of 100 parts by weight of the remaining raw coal and the dry pulverized coal, the dry pulverized coal is 50 to 100 parts by weight of a molded body manufacturing method.
The method of claim 2,
The remaining raw coal is a method for producing a molded body containing 5 to 15% by weight of moisture.
The method of claim 1,
The dry pulverized coal is a method for producing a molded body containing less than 2% by weight of moisture.
delete The method of claim 2,
In the step of preparing the mixed coal;
With respect to the sum of 100 parts by weight of the remaining raw coal and the dry pulverized coal, the binder is 5 parts by weight or less (excluding 0 parts by weight).
The method of claim 1,
The binder is wheat, corn, potato, sweet potato, and cassava method of manufacturing a molded body comprising a starch made from any one of the raw materials.
The method of claim 1,
The binder is a method for producing a molded body containing alpha starch or beta starch.
The method of claim 1,
The binder is a method of manufacturing a molded body containing 60 to 100% by weight of starch.
The method of claim 1,
The step of preparing the mixed coal; The,
A method for producing a molded article that is mixed through high-speed stirring.
The method of claim 1,
Heating the mixed coal; In,
The temperature of the mixed coal is 45 to 90 ℃ molded body manufacturing method.
The method of claim 1,
Heating the mixed coal; The,
A method for manufacturing a molded article comprising the step of supplying steam to the mixed coal.
The method of claim 1,
The step of preparing the molded body; the,
A method for producing a molded article that is molded with a double roll type molding machine.
Coke storage bin;
A dryer for drying some of the raw coal stored in the raw coal storage bin;
A collecting device for collecting dry pulverized coal scattering in the dryer;
A dry pulverized coal storage bin for storing the dried pulverized coal collected by the collecting device;
Binder storage bin;
A mixing facility for producing mixed coal by receiving and mixing dry pulverized coal and a binder from the dry pulverized coal storage bin and the binder storage bin;
A heating device receiving and heating the mixed coal from the mixing facility; And
A molding machine for receiving and molding the mixed coal heated from the heating device;
Including,
The mixed coal contains 5 to 15% by weight of moisture,
The apparatus for manufacturing a molded body in which the binder is 2 parts by weight or less (excluding 0 parts by weight) based on 100 parts by weight of the sum of the dry pulverized coal and moisture.
The method of claim 14,
The mixing facility is a molded body manufacturing apparatus for manufacturing a mixed coal by receiving and mixing the raw coal further supplied from the raw coal storage bin.
The method of claim 14,
The heating device has a steam supply pipe connected, and receives steam from the steam supply pipe to heat the mixed coal.
The method of claim 14,
The heating device is a vertical or horizontal molded article manufacturing apparatus.
The method of claim 14,
The molding machine is an apparatus for producing a molded article in a double roll form.

Images