KR101504836B1 - Apparatus for producing carbon composite metal oxide briquette and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an apparatus to manufacture a carbon composite metal oxide briquette, and a manufacturing method using the same. The apparatus to manufacture a carbon composite metal oxide briquette comprises: a pulverizer to pulverize a low-rank coal; a slurry maker to mix the low-rank coal pulverized by the pulverizer with a solvent to make them into a slurry; an extraction reactor to make the slurry into soluble and insoluble matters using a solvent extraction reaction; a separator to separate the soluble matter from the insoluble matter; a dryer to make reforming coal by drying the soluble matter; a mixer to mix the reforming coal with iron ore; a briquette maker to make the mixture made by the mixer into a briquette; and a furnace to sinter the briquette.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a carbonaceous material-containing briquette,

The present invention relates to an apparatus for manufacturing a carbonaceous material-containing briquette and a manufacturing method using the same, and more particularly to a manufacturing apparatus for a carbonaceous material-containing briquetting apparatus using low carbon and a novel manufacturing method using the same.

In steelworks, iron ore and coal (coke) are used to produce molten iron in large blast furnaces. In general, iron ore and coal have been separately prepared. On the other hand, in order to improve the reaction efficiency between the coal and the iron ore, the iron ore and the coal were mixed and agglomerated (briquetted) before being charged into the large blast furnace.

In order to agglomerate the iron ore and coal, a method of compacting in hot or using a large amount of binder has been used. On the other hand, in the case of compacting in hot state, iron ore and coal have to be heated in advance, and wear of the apparatus frequently occurs even in a molding process for making compact. In addition, when a large amount of binder is used, a component (such as alkali metal or tar component) inside the binder acts as an impurity causing a problem in the blast furnace, so that a process for removing such impurities must be added. Particularly, when an inorganic binder is used, there is a problem that an additional flux is needed to increase the slag in the blast furnace and increase the basicity of the slag and control the basicity.

In addition, in the process of compacting coal and iron ore in general, high-quality coking coal has been used as the coal. However, the high-quality coking coal is problematic because its production area is limited and its reserves are gradually exhausted. Since a large blast furnace consumes a large amount of coal, cost reduction of the raw material of the coal is required.

Therefore, the development of a technology capable of manufacturing a high-strength coal while using low-grade (low-grade) low-cost bituminous coal or lignite as a raw material is actively under way. In addition, various studies have been conducted to produce a briquetting material for a blast furnace for a blast furnace, in which the strength is always kept at the same time while using low carbon.

An object of the present invention is to provide an apparatus and a method for manufacturing a carbon-bearing briquetting apparatus using low carbon.

It is another object of the present invention to provide a briquetting material for a blast furnace for a blast furnace using a novel manufacturing apparatus and a manufacturing method.

Another object of the present invention is to provide a carbonaceous material-containing briquette which is fired at a low temperature to improve its strength.

According to an aspect of the present invention, embodiments of the present invention provide a crusher for crushing low grade coal; A slurry maker for slurrying the low-carbon coal pulverized by the crusher and a solvent; An extraction reactor in which the slurried low carbon is made soluble and insoluble using a solvent extraction reaction; A separator for separating the dissolved component and the separated component; A dryer for producing the reformed coal by drying the dissolved component; A mixer for mixing the reformed coal and iron ore; A briquetting machine for producing the mixed material in the mixer as briquettes; And a firing furnace for firing the briquettes.

The slurry producing machine may include a heater for drying the moisture in the slurry.

The separator may be performed by at least one of gravity sedimentation, centrifugation, and filtration separation.

The dryer may utilize a reduced pressure or an inert gas.

The carbonaceous built-in briquet may further include a first hopper for containing the reformed carbon produced by the dryer, and a second hopper provided adjacent to the first hopper for containing the iron ore.

The first and second hoppers may each include a supply line for supplying reformed coal and iron ores to the mixer.

The briquetting machine may be a twin roll type molding machine.

The carbonaceous built-in briquette production apparatus may further include a screen for selecting the carbonaceous built-in briquettes fired in the firing furnace.

According to another aspect of the present invention, there is provided a process for producing a modified carbide according to the present invention, comprising the steps of: preparing a low carbon by dissolving reaction in liquid phase and insoluble in solid phase; Mixing the reformed coal and iron ore to form a briquette; And a firing step of low-temperature firing the briquettes at a temperature ranging from 300 ° C to 700 ° C.

In the reforming step, the low carbon may include at least one of lignite and bituminous coal.

In the reforming step, the low carbon may be pulverized, and the pulverized low carbon may be mixed with a coal derived solvent to form a slurry, followed by solvent extraction to improve the degree of cohesion.

The solvent extraction reaction may be performed by extracting the slurried lower carbon in a temperature range of 300 ° C. to 700 ° C. and a pressure range of 50 bar or less for 2 hours or less to obtain a liquid phosphorus solute and a solid insoluble matter.

When the modified carbon and iron ore are mixed in the molding step, a binder may be further added.

The binder may be an organic binder including at least one selected from tar, pitch and molasses.

The modified carbon may be mixed with iron ores and molded into briquettes in a twin-roll type briquetting machine.

The iron ores may have a particle size of 5 mm or less.

The content of the modified carbon in the mixture of the modified carbon and the iron ore may be 5 wt% to 30 wt% with respect to the total weight of the mixture.

Industrial Applicability According to the present invention, it is possible to provide an apparatus and a method for manufacturing a carbonaceous material-containing briquettes using low carbon.

Further, according to the present invention, it is possible to provide a briquetting furnace for a blast furnace using a novel manufacturing apparatus and a manufacturing method.

Further, according to the present invention, it is possible to provide a carbonaceous material-containing briquette which is fired at a low temperature to improve its strength.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an apparatus for manufacturing a carbon-bearing briquettes according to an embodiment of the present invention. FIG.
2 is a flowchart illustrating a method of manufacturing a carbon-bearing briquette according to another embodiment of the present invention.
3 is a graph showing the compressive strength measured before firing the carbonaceous material-containing briquettes.
4 is a graph showing the compressive strength measured after firing the carbon-bearing briquettes shown in Fig.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. In the following description, it is assumed that a part is connected to another part, But also indirectly connected through the medium in the middle thereof. In the drawings, parts not relating to the present invention are omitted for clarity of description, and like parts are denoted by the same reference numerals throughout the specification.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an apparatus for manufacturing a carbon-bearing briquettes according to an embodiment of the present invention. FIG.

An apparatus 10 for manufacturing a carbonaceous material-containing briquettes according to an embodiment of the present invention relates to an apparatus for manufacturing a carbonaceous material-containing briquettes P using low carbon (R) A briquetting unit 200 for briquetting the briquettes using the modified briquettes produced in the briquetting unit 100 and a briquetting unit 200 for briquetting the briquettes to improve physical properties And a firing portion 300. For example, the reforming unit 100 may include a crusher 110 for crushing low carbon (R); A slurry maker 120 for slurrying the low-carbon coal pulverized by the crusher 100 and a solvent; An extraction reactor (130) for preparing the slurried lower carbon by dissolving and insolubilizing the slurried lower carbon; A separator (140) for separating the dissolved component and the separated component, respectively; And a dryer 150 for drying the molten fraction to produce a modified carbon (a), wherein the forming unit 200 includes a mixer for mixing the modified carbon (a) produced by the reforming unit 100 with iron ores, (230); And a briquetting machine 240 for producing a mixed material in the mixer 230 as briquettes, wherein the firing unit 300 includes a firing furnace 310 for firing the briquettes obtained from the forming unit 200 .

The bark-embedded briquette manufacturing apparatus 10 according to the present embodiment can be manufactured by manufacturing low grade carbon (R) as a reformed carbon having improved physical properties such as hardenability by using a solvent extraction method or a coal liquefaction technique, The present invention relates to an apparatus for manufacturing briquettes. The carbonaceous built-in briquettes (P) manufactured by the carbonaceous material-containing briquette manufacturing apparatus (10) can be produced by using low-cost carbon (R) The same or higher strength, and the like.

The low carbon (R) is crushed in the crusher (110), and the slurry producing machine (120) can receive the crushed low carbon. Further, a solvent such as a coal-derived solvent may be put into the slurry maker 120 to be mixed with the pulverized low carbon to be slurried. At this time, the low carbon may be lignite or sub-bituminous coal. In addition, the slurry maker 120 may include a heater 121 for drying moisture in the slurry.

The heater 121 can remove moisture in the slurry by heating the slurry at a temperature higher than the boiling point of water. For example, the coal-derived solvent constituting the slurry may have a boiling point of about 200 ° C to 500 ° C, and the heater 121 may heat the water in the slurry to a boiling point or higher of water so as not to evaporate the coal- Based solvent so as to maintain a temperature lower than the boiling point of the coal-derived solvent. Further, the internal pressure of the slurry maker 120 may be controlled to prevent the coal-derived solvent from evaporating. The coal-derived solvent means a solvent derived from coal, and may include, for example, coal tar, an aromatic solvent, a water-insoluble feminine solvent and the like. The hydrogenated female solvent may use at least one of hydrogenated anthracene oil, naphthalene oil, methylnaphthalene oil, creosote oil, phenanthrene oil, tetrahydronaphthalene oil and biphenyl oil.

The extraction reactor 130 is a part for performing a solvent extraction reaction and may be made of a material having a predetermined strength so that an extraction reaction can be performed under high temperature and high pressure. The lower carbon and solvent which are pulverized in the extraction reactor 130 may be prepared by dissolving the solvent in a substantially liquid form and a solid insoluble matter by a solvent extraction reaction.

The separator 140 separates the dissolved and insoluble matter produced in the extraction reactor 130, and may be performed by one or more of gravity settling, centrifugation, and filtration separation. For example, when the mixed solution and the insoluble component are placed in a vessel, the heavy component is partially separated by gravity sedimentation, and then separated by filtration using a filter or the like to separate the component in liquid phase into insoluble component in solid phase.

The dissolved component may be dried in the dryer 150 to be manufactured as a modified carbon (a), and may be molded together with iron ores in the forming unit 200. Further, the insoluble matter may be separated from the dissolved component and dried (b) in a separate dryer 160. The dissolving dryer (150) and the insoluble solvent dryer (160) may use a reduced pressure or an inert gas.

The low carbon (R) is reformed in the reforming section (100) to produce a modified carbon (a), and the modified carbon (a) is molded together with iron ores in the forming section (200). The carbonaceous built-in briquette 10 includes a first hopper 210 for accommodating the reformed carbon (a) produced in the dryer 150 in the forming unit 200, and a second hopper 210 adjacent to the first hopper 210 And a second hopper 220 for receiving the iron ores. The reformed carbon (a) and the iron ores are stored in the first and second hoppers 210 and 220, respectively, and then the supply amount and the feed rate are separately controlled and supplied to the mixer 230. The first and second hoppers 210 and 220 may each include a supply line for supplying reformed coal and iron ores to the mixer 230. The supply lines provided in the first and second hoppers 210 and 230 may be connected to the mixer 210 separately by a kind of nozzle or may be connected to the mixer 230 as one supply line as shown in the drawing . The reformed carbon may be uniformly mixed with the iron ores in the mixer 230.

Generally, in the case of producing a carbonaceous material-containing briquettes by mixing common coking coal with iron ores, a large amount of binder or the like is used for bonding the coking coal to the iron ore. At this time, when a large amount of binder is used, the components (such as alkali metal or tar component) inside the binder act as impurities which cause problems in the blast furnace, which is a problem. Further, when an inorganic binder is used, there is a problem that the slag in the blast furnace is increased and the basicity of the slag is increased, thereby affecting the process.

On the other hand, the carbonaceous built-in briquettes according to the present embodiment have a good quality of the modified carbon by the modified part and are easily bonded to the iron ore without a separate binder. Therefore, since a large amount of binder can be omitted, an additional step such as removal of impurities is unnecessary, and the process is not affected, so that a desired product can be produced with excellent quality. In addition, the modified carbon according to the present embodiment uses low-priced low-cost carbon, which can lower the process ratio.

The reformed coal and iron ores that are uniformly mixed in the mixer 230 may be transferred to the briquetting machine 240 and molded into briquettes. For example, the briquetting machine 240 may be a twin roll type molding machine. The twin roll type molding apparatus may include a pair of press rolls and a motor for rotating the press rolls. A mixture of reformed coal and iron ore can be supplied between the pair of pressure rolls to produce briquettes.

And then may be baked at a low temperature in the firing furnace 310, for example, at a temperature ranging from 300 ° C to 700 ° C. The properties of the carbonaceous built-in briquettes (P) produced by low-temperature firing can be further improved by the low-temperature firing. Further, the carbonaceous material-containing briquette manufacturing apparatus 10 may further include a screen 320 for sorting the carbonaceous material-containing briquettes fired in the firing furnace 310.

2 is a flowchart illustrating a method of manufacturing a carbon-bearing briquette according to another embodiment of the present invention.

FIG. 2 is a view showing a method using the apparatus for manufacturing a carbonaceous briquettes shown in FIG. 1, wherein the method for producing the carbonaceous briquettes comprises the steps of preparing low-carbon by dissolving a low- A reforming step (S100) of producing a modified carbon; A forming step (S200) of mixing the modified carbon with iron ores and a binder and molding them into briquettes; And a firing step (S300) of baking the briquettes at a low temperature within a temperature range of 300 ° C to 700 ° C.

The reforming step (S100) is a step of modifying the low carbon to produce a modified carbon having improved physical properties such as a hardness. For example, the low carbon may include at least one of lignite and sub-bituminous coal. After pulverizing the low carbon, the pulverized low carbon may be mixed with a coal derived solvent to form a slurry. The coal-derived solvent may be any one of coal tar, aromatic solvent, and hydrogen donor solvent.

Low-grade carbons dispersed and slurred in a coal-derived solvent can be improved in the degree of cohesion by a solvent extraction reaction or a coal liquefaction reaction. The solvent extraction reaction is carried out in the presence of a slurry of low carbon in an extraction reactor capable of reacting at a high temperature and a high pressure, followed by extraction at a temperature range of about 300 ° C. to 700 ° C. and a pressure range of 50 bar or less for 2 hours or less, The low-grade carbon can be produced as a liquid-phase dissolved product and a solid-phase insoluble product. If the temperature range is less than 300 ° C, the solvent extraction reaction is not performed, which is a problem. If the temperature range is more than 700 ° C, unnecessarily high heat is heated in the reactor to waste energy, . The pressure range may be correlated with the temperature range. If the pressure range is 50 bar or less, the solvent extraction reaction can be sufficiently performed. However, when the pressure exceeds 50 bar, there is a problem that energy waste for maintaining the above pressure and damage to the reactor can be promoted. In addition, the solvent extraction reaction can be sufficiently carried out for 2 hours. If the reaction time exceeds 2 hours, the unnecessary reaction time is increased and the time for maintaining the high temperature and the high pressure in the reactor is increased, .

The dissolved components and the insolubles thus prepared exist in a mixed state, and they can be separated into soluble components and insoluble components by using at least one of gravity sedimentation, centrifugation and filtration. The separated insoluble matter can be dried and used in other processes. The dissolved components may be dried at reduced pressure or dried using an inert gas to produce a modified carbon having improved cohesion. That is, the low-grade coal can be produced as a reformed coal by removing the ash component in coal by using a solvent extraction reaction (or a coal liquefaction process) and improving the integrity and reactivity.

In the forming step S200, the reformed coal and iron ore sandwiched in the reforming step S100 may be mixed to form a briquette. Further, when the modified carbon and iron ore are mixed, a binder may be further added. For example, the binder may be an organic material including at least one selected from tar, pitch and molasses.

In the method for manufacturing a carbon-bearing briquette according to this embodiment, since the modified carbon itself has a cohesive nature, it can be easily combined with iron ore without adding a large amount of binder. On the other hand, a small amount of a binder may be added in order to improve the process speed, or to shorten the mixing time of the reformed coal and iron ore, or to reduce the amount of the modified carbon. At this time, the organic base material may be used as the binder so as not to affect the basicity of the process.

The modified carbon may be mixed with iron ores and molded into briquettes in a twin-roll type briquetting machine. The twin roll type brittle forming apparatus may include a pair of rotating pressure rolls and a motor for driving the pressure rolls. The mixed reformed coal and iron ore are poured into a pair of press rolls and can be passed through a rotating press roll and molded in the form of briquettes. At this time, it is preferable that the iron ores have a particle size of 5 mm or less, and the content of the modified carbon in the mixture of the modified carbon and the iron ore is 5 wt% to 30 wt% with respect to the total weight of the mixture.

When the particle size of the iron ores exceeds 5 mm, the contact area between the iron ore and the reformed carbon is not sufficient, so that the reaction efficiency is low and the effect of improving the strength of the carbonaceous briquettes after the firing step S300 may be lowered . When the content of the modified carbon is less than 5 wt%, the effect of improving the strength of the carbon-containing briquettes by the addition of the modified carbon is insignificant. When the content of the modified carbon is more than 30 wt%, the effect of improving the strength of the carbon- Not enough. Therefore, in order to sufficiently secure the strength of the carbon-bearing briquettes by the addition of the reformed carbon and at the same time to maintain the content of the iron-rich property in the carbon-bearing briquettes, it is preferable that the amount of the modified carbon is 5 wt% to 30 wt%.

In the firing step (S300), the modified carbon and iron ore mixture produced by the briquetting can be fired at a low temperature. For example, by baking the briquettes at 300 ° C to 700 ° C, physical properties such as strength of the briquettes can be further improved.

When the firing temperature of the briquetting is less than 300 占 폚 in the firing step (S300), since the cohesion of the coal is not exhibited, the effect of improving the strength can not be obtained even by firing. If the firing temperature is higher than 700 ° C., the effect of improving the strength of the briquet is insignificant, and unnecessary energy waste for improving the temperature and damage of the reactor can be caused.

Hereinafter, examples and comparative examples of the present invention will be described. However, the following examples are only a preferred embodiment of the present invention, and the scope of the present invention is not limited by the following examples.

A carbonaceous built-in briquettes were produced using the carbonaceous material-containing briquetting apparatus shown in FIG. 1 and the carbonaceous material-containing briquetting method shown in FIG.

1. Manufacture of modified coal using lignite

1-methylnaphthalene (oil), which is a solvent, and grinded lignite are mixed in a weight ratio of 1: 1 (weight ratio: 1: 1) ) To prepare a slurry state. The lignite prepared in the slurry state was provided in the high-temperature and high-pressure reactor and heated to about 100 캜 at which the water was boiling to evaporate moisture in the slurry. Solvent extraction was carried out using a 2-ring aromatic organic solvent, 1-methylnaphthalene. The extraction reaction was carried out at 10 bar for 2 hours. After completion of the reaction, the mixture was made of a mixture of a liquid component (dissolved component) and a solid component (blended component). The filtered component was separated by filtration, and the dissolved component was distilled and dried to obtain a modified carbon.

2. Manufacture of modified coal using bituminous coal

The reformed coal was prepared by using bituminous coal. Except that the lower coal was used in place of lignite in the preparation of the reformed coal using the above-described lignite, all of which were made by the same method.

In the following Table 1, in order to confirm the physical properties of the modified carbon (A, B) produced by using low-grade coal such as lignite and bituminous coal, the expansion index (FSI: Free Swelling index, total dilation (TD), and flowability of the modified carbon. In addition, it was also compared with the modified coal produced using the above-mentioned low-grade coal, lignite and bituminous coal, and the bituminous coal used as the high-grade coal used in the conventional carbonaceous internal briquettes.

The expansion index, the total expansion, and the degree of fluidity are indicators for measuring and comparing the physical properties of coal. The higher the expansion index, the total expansion and the fluidity, the more excellent the cohesion can be classified. In general, the expansion index is a physical property value of a coal which measures an exponential index when the coal is heated to about 800 DEG C, and the total expansion is a value indexed by measuring shrinkage and expansion degree of coal at a certain temperature after molding the coal, The flow rate represents the value of the viscosity measured while heating the coal.

lignite Sub-bituminous coal Premium shot (ref.) Before reforming After modification Before reforming After modification Expansion Index (FSI) 1.5 5 One 2.5 5.5 Total expansion (TD) 0 42 2 37 51 Flow (log.MF) 0 4.6 0 4.8 3.6

Lignite and sub-bituminous coal are low-grade carbons, and the expansion index, the total expansion and the fluidity are higher than that of the high-grade carbon (ref.), Which is usually used as a raw material of the carbonaceous briquettes before the reforming Low. Also, in the case of lignite, the total expansion and the degree of fluidity were 0 before the reforming, and the degree of fluidity before the reforming was 0 in the case of the bituminous coal. On the other hand, it was confirmed that the expansion index, the total expansion and the fluidity were improved after the lignite and the bituminous coal were prepared from the reformed coal. In addition, even when compared with high-grade coal, it was confirmed that the expansion index and the total expansion of the lignite and bituminous coal (after reforming) made of the modified coal were improved to be equivalent to that of the high-grade coal.

3 is a graph showing the compressive strength measured before firing the carbonaceous material-containing briquettes, and FIG. 4 is a graph showing the compressive strengths measured after firing the carbonaceous material-containing briquettes of FIG.

As shown in Table 1, carbonaceous internal briquettes were prepared by using lignite before reforming and lignite after reforming in the following manner, respectively, and bark-embedded barkets were prepared by using bituminous coal before reforming and bituminous coal after reforming, respectively. 3 shows the results of measurement of the compressive strength of each of the carbonaceous internal briquettes manufactured in this manner and the commonly used coke producing coal ( bituminous coal ) before low-temperature firing was performed. Subsequently, low-temperature firing was performed for each The compressive strength was measured and shown in Fig. Here, the compressive strength means the maximum load value which means when coal is destroyed by applying load to coal. The higher the compressive strength, the better the compressive strength.

3. Manufacturing briquettes with carbonaceous material before reforming

Before the reforming, the minerals iron powder having a grain size of 0.1 mm or less were provided in different hoppers, and then the iron ores were mixed in an amount of 20 wt%. The mixed reformed coal and iron ore were put into a briquetting type briquetting machine and made into a briquetting type. The compressive strength of the manufactured carbonaceous briquettes was measured and shown in FIG. Then, the carbonaceous briquettes were subjected to low-temperature firing at 600 DEG C in a firing machine, and the compressive strength was measured and shown in Fig.

4. Manufacturing briquettes with carbonated lignite after reforming

The carbonaceous briquettes were fabricated by using modified coal produced by using lignite. A carbonaceous built-in briquettes were produced in the same manner as the above-described method for producing the carbonaceous built-in briquettes, except that the lignite was used before the reforming. Similarly, the compressive strength after the low-temperature firing was measured and shown in Figs. 3 and 4, respectively.

5. Manufacture of bark-embedded barket with bituminous coal before reforming

Carbonaceous embedded briquettes were prepared in the same manner as described above, except that bituminous coal was used before reforming. The produced carbonaceous internal briquettes were measured for compressive strength after low-temperature firing and are shown in FIGS. 3 and 4, respectively.

6. Manufacture of bark embedded with carbon black after reforming

A carbonaceous internal briquette was manufactured in the same manner as the above-mentioned method, except that the modified carbon produced by using bituminous coal was used. The produced carbonaceous internal briquettes were measured for compressive strength after low-temperature firing and are shown in FIGS. 3 and 4, respectively.

7. Manufacture for general coke Coal (ref.)

The compressive strength of the bituminous coal before and after the low-temperature baking at 600 ° C. is shown in FIG. 3, and the compressive strength after calcination is shown in FIG.

3 and 4, both of the production coke (ref.) For general coke, the carbonaceous internal briquettes using lignite before reforming and the lignite after reforming, and the carbonaceous internal briquetting using reforming sub- It was confirmed that the compressive strength was increased.

Also, referring to FIG. 3, it was confirmed that the compressive strength was lower in the case of using the pre-reforming lignite and the pre-reforming bituminous coal than the general coke-produced coal. That is, in order to use the manufactured carbonaceous briquettes, compression strength equivalent to that of general-purpose coke coal is required. However, it has been confirmed that the carbonaceous briquettes containing carbon black before reforming and before reforming are not suitable because of low compressive strength . On the other hand, it was confirmed that when lignite and bituminous coal were manufactured as reformed coal and then the carbonaceous internal briquettes were produced, they exhibited compressive strength equal to or higher than that of general coke produced coal. That is, FIG. 3 shows that the carbonaceous material-containing briquettes made of modified coal using low carbon prior to low-temperature firing (lignite and bituminous coal) had a compressive strength corresponding to that of coke for general coke before firing.

Referring to FIG. 4, it can be seen that the low-temperature firing of the carbonaceous internal briquettes produced using pre-reforming lignite and pre-reforming bituminous coal increases the compression strength before the low-temperature firing in FIG. 3 by about 10 kgf / p. It was also confirmed that even when the carbonaceous internal briquettes produced by using the bituminous coal after reforming and the after-reforming of the bituminous coal were subjected to low-temperature firing, the compression strength before the low-temperature firing in Fig. 3 was increased by about 130 kgf / p or more. In other words, it was confirmed that the compressive strength was improved by calcining in the case of the carbonaceous internal briquettes using the bitumen before reforming and the bituminous coal before reforming, and the carbonaceous internal briquettes using the bituminous coal after the reforming and the bituminous coal after the reforming. On the other hand, the effect of increasing the strength by low temperature firing was confirmed to be more effective in compressive strength in modified carbonaceous briquettes using modified lignite and modified bituminous coal.

The low grade coal, lignite and bituminous coal, was modified and made from highly reformable modified carbon. The burying of the carbonaceous material using the modified carbon thus obtained showed a remarkable improvement in compressive strength after low temperature firing. This is attributed to the improved cohesion of the modified carbon. It has been confirmed that the modified carbon has a compressive strength equivalent to that of the generally used coconut coal produced by modifying the low carbon to improve the cohesion.

The embodiment according to the present invention can improve the cohesiveness of low carbon by preparing a reformed carbon by solvent extraction reaction using low carbon such as lignite and bituminous coal. In addition, it was confirmed that the carbonaceous internal briquettes produced using the modified carbon having improved cohesiveness as described above had strength equivalent to that of the commonly used coke-producing coal. In the case of using the modified carbon having the improved degree of closure according to the embodiment of the present invention, the bonding force with the iron ores is improved by the self-hardening property, so that a large amount of binder can be omitted. In addition, since the briquettes embedded in the carbonaceous material according to the present embodiment are abundant in reserves and use low-cost low-cost coals, it is possible to reduce the production steps of the briquettes and to cope with high- .

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10: Carbonaceous material built-in briquette production apparatus 100:
110: crusher 120: slurry maker
130: Extraction reactor 140: Separator
150: dryer 200: molding part
210: first hopper 220: second hopper
230: mixer 240: briquetting machine
300: firing portion 310: firing furnace

Claims (16)

A crusher for crushing low grade coal;
A slurry maker for slurrying the low-carbon coal pulverized by the crusher and a solvent;
An extraction reactor in which the slurried low carbon is made soluble and insoluble using a solvent extraction reaction;
A separator for separating the soluble component and the insoluble component, respectively;
A dryer for producing the reformed coal by drying the dissolved component;
A mixer for mixing the reformed coal and iron ore;
A briquetting machine for producing the mixed material in the mixer as briquettes; And
And a firing furnace for firing the briquettes,
Wherein the dryer is a low-carbon coal-fired briquette-making apparatus using reduced pressure or inert gas. The method according to claim 1,
Wherein the slurry producing machine has a heater for drying moisture in the slurry. delete The method according to claim 1,
Wherein the carbonaceous built-in briquette further comprises a first hopper for containing the reformed carbon produced by the dryer, and a second hopper provided adjacent to the first hopper for storing the iron ore. 5. The method of claim 4,
Wherein the first and second hoppers each have a supply line for supplying reformed coal and iron ore to the mixer. The method according to claim 1,
Wherein the briquetting machine is a twin roll type briquette forming machine. The method according to claim 1,
Wherein the apparatus for manufacturing a carbonaceous material-containing briquet further comprises a screen for screening the carbonaceous built-in briquettes fired in the firing furnace. A step of preparing low-grade carbon by a solvent extraction reaction as a liquid-phase soluble substance and a solid-phase insoluble substance and drying the solubilized substance to prepare a reformed carbon;
Mixing the reformed coal and iron ore to form a briquette; And
And firing the briquettes at a low temperature in a temperature range of 300 ° C to 700 ° C,
Wherein the modifying step comprises grinding the low carbon, mixing the pulverized low carbon with a coal derived solvent to form a slurry, and then improving the cohesion by solvent extraction reaction, . 9. The method of claim 8,
Wherein the low-grade coal in the reforming step is a low-grade coal including at least one of lignite and sub-bituminous coal. delete 9. The method of claim 8,
The solvent extraction reaction is carried out by extracting the slurried low carbon from 300 ° C. to 700 ° C. and a pressure range of 50 bar or less for 2 hours or less to obtain a liquid carbonate-containing solution and a solid carbonate-containing briquettes Gt; 12. The method of claim 11,
Wherein the binder is further added when the reforming coal and iron ore are mixed in the molding step. 13. The method of claim 12,
Wherein the binder is at least one selected from the group consisting of tar, pitch and molasses, and the binder is an organic binder. 9. The method of claim 8,
Wherein the reformed coal is mixed with iron ore and the briquetting is performed in a twin roll type briquetting machine. 14. The method of claim 13,
Wherein the iron ores have a particle size of 5 mm or less. 9. The method of claim 8,
Wherein the amount of the modified carbon in the mixture of the modified carbon and the iron ore is 5 wt% to 30 wt% with respect to the total weight of the mixture.

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