KR101648686B1 - Pulverized coal injection device, blast furnace comprising same, and pulverized coal supply method - Google Patents

Abstract

The operation cost of the blast furnace facility is reduced and the production cost of the pig iron is reduced.
The pulverized coal receiving device 5A is configured to blow pulverized coal together with heated and compressed intake air from a bullet hole 8 of the blast furnace main body 2 and as a raw material of the pulverized coal, Is used. A heat exchanger 25a is formed as a heat transfer means for transferring the heat generated by the self-heating action of the reformed coal to a portion requiring heat. The heat exchanger 25a heats the intake air by heat-exchanging the heat generated by the self-heating action of the reformed coal passing through the pulverized coal supply pipe 22 with, for example, the air sucked into the take-in air feeder 23 . It is also possible to provide a deactivation means for deactivating the reformed coal to such an extent that the self-heating effect remains a predetermined amount.

Description

TECHNICAL FIELD [0001] The present invention relates to a pulverized coal drawing apparatus, a furnace furnace equipped with the same, and a pulverized coal supplying apparatus,

The present invention relates to a pulverized coal drawing machine, a blast furnace equipped with the same, and a pulverized coal supplying method.

Pulverized coal injection (PCI) as auxiliary fuel in the blast furnace facility is a low-cost auxiliary fuel supply method that replaces heavy oil injection, which has been performed until the 1970s. Important conditions as pulverized coal for injecting blast furnace (PCI charcoal) is that it has excellent combustion ability with low water content and low volatile content, that burning rate is as high as that of heavy oil, that less unburned carbon burns and ash, 6500 kcal / kg Or less, and the content of sulfur and phosphorus (phosphorus content) is small.

In order to satisfy these conditions, in the present situation, as shown in Patent Document 1, raw coal of relatively high quality and high price such as bituminous coal is used as a raw material for PCI coals. Such raw coal is pulverized to a predetermined particle size by a pulverizer to be pulverized coal, and is transported and stored in a storage tank provided in the vicinity of the blast furnace body by high-pressure air, nitrogen or the like. Then, from the tuyere formed in the lower part of the main body of the blast furnace, it is blown into the blast furnace body together with hot air of heated high-pressure air, and is supplied to the combustion.

Japanese Laid-Open Patent Publication No. 2012-173241

However, as described above, since the high-quality and high-priced raw coal is required as the raw material for the PCI coal to be blown into the interior of the blast furnace body as the auxiliary fuel, the operation cost of the blast furnace facility is increased. As a result, Resulting in an increase in manufacturing cost.

In addition, the pulverized coal is blown into the blast furnace together with the compressed air. In order to prevent the furnace from being cooled by the compressed air at the time of the blowing, the compressed air must be heated to about 1200 ° C by a burner or the like in advance. This requires a large amount of fuel, such as heavy oil, which has been a cause of increasing the operation cost of the blast furnace facility.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a pulverized coal drawing apparatus, a blast furnace facility having the same, and a pulverized coal supplying method capable of reducing the manufacturing cost of the pig iron by reducing the operating cost of blast furnace facilities do.

In order to solve the above problems, the present invention employs the following means.

That is, the pulverized coal receiving apparatus according to the first aspect of the present invention is a pulverized coal receiving apparatus configured to take pulverized coal together with heated and compressed intake air from a worm of a blast furnace main body, wherein the pulverized coal receiving apparatus is modified from low- A self-extinguishing reformed carbon is used.

According to the pulverized coal receiving apparatus, since the reformed coal, which is significantly lower in cost than the raw coal such as bituminous coal which is generally used, is used as the raw material of the pulverized coal to be blown as the auxiliary fuel into the blast furnace main body, The operating cost can be reduced and the production cost of the pig iron can be reduced.

In addition, the heat of the reformed carbon can be effectively used in other regions requiring heat, contributing to energy saving.

In the pulverized coal receiving apparatus according to the first aspect of the present invention, it is preferable to form the heat transfer means for transferring the heat generated by the self-heating action of the reformed coal to a portion requiring heat.

In the case of the above configuration, since the heat due to the self-heating action of the reformed carbon is transferred to the portion requiring heat by the heat transfer means, the fuel and electric power consumed for generating heat at the portion Thereby reducing the operating cost of the blast furnace facility and further reducing the manufacturing cost of the pig iron.

In addition, since the heat of the reformed carbon is transferred by the heat transfer means, the reformed carbon is cooled, thereby preventing the reformed carbon from spontaneously igniting.

In the pulverized coal receiving apparatus according to the first aspect of the present invention, it is preferable that the heat transfer means is configured to heat exchange the blown air before being compressed with the reformed coal.

According to the above arrangement, the blown air is appropriately heated by heat exchange with the reformed carbon before being heated by the dedicated heating means. This can save energy for further heating the incoming air. Particularly, since the cold blown air before compression is exchanged with the reformed carbon, the cooling effect of the reformed carbon is enhanced, the rate of generation of the compressed heat of the blown air is increased, and the energy required for heating the blown air is increased Can be reduced.

In the pulverized coal receiving apparatus according to the first aspect of the present invention, it is preferable that the heat transfer means is configured to transfer the heat of the reformed carbon to the reforming device for reforming the low carbon.

According to the above configuration, since part of the heat required in the reforming apparatus for reforming the low-grade carbon is supplied by the heat of the reformed carbon, the energy consumed in the reforming apparatus can be saved.

The pulverized coal receiving apparatus according to the first aspect of the present invention preferably includes a deactivation means for deactivating the modified carbon in such a manner that a predetermined amount of the self heating effect remains.

According to the above configuration, since the self-heating effect of the reformed carbon is weakened, the necessity of transporting the reformed carbon in a nitrogen atmosphere is suppressed so that the reformed carbon does not spontaneously ignite, and the utilization rate of the nitrogen supply device can be lowered. Therefore, the operating cost of the blast furnace facility can be reduced, and the production cost of the pig iron can be reduced.

In the pulverized coal drawing apparatus according to the first aspect of the present invention, in the above-described structure, the pulverized coal made of the modified carbon and the pulverized coal made of the generally used raw coal are mixed, , And the pulverized coal comprising the raw coal is dried by the self-heating action of the reformed coal.

In the case of the above configuration, the pulverized coal composed of the raw coal having a water content higher than that of the reformed coal is mixed with the pulverized coal made of the reformed coal, whereby the pulverized coal made of the raw coal is dried by the heat of the reformed coal having self-heating ability. Therefore, the drying process of the raw coal can be partially omitted or simplified. As a result, the equipment, energy, personnel, etc. related to the drying process can be reduced to reduce the operating cost of the blast furnace facility, and the production cost of the pig iron can be reduced.

The blast furnace apparatus according to the second aspect of the present invention comprises the pulverized coal receiving apparatus of any of the configurations described above.

According to this blast furnace facility, the cost of the auxiliary fuel is reduced to reduce the operating cost of the blast furnace facility, and the manufacturing cost of the pig iron can be reduced. Together, the heat at the time of the self-heating of the reformed coal can be effectively used.

The pulverized coal supplying method according to the third aspect of the present invention is a pulverized coal supplying method for pulverizing pulverized coal together with heated and compressed charged air from a wick of a main body of a blast furnace as a raw material of the pulverized coal, Using a reformed carbon, the heat generated by the self-heating action of the modified carbon is transferred to a site requiring heat.

According to this pulverized coal supplying method, since the pulverized coal charged as the auxiliary fuel into the blast furnace body becomes an inexpensive reformed coal, the cost of the auxiliary fuel can be lowered and the production cost of the pig iron can be reduced. In addition, the heat generated by the self-heating effect of the reformed coal is transferred to a region requiring heat and effectively used, and fuel and electric power consumed to generate heat at the site are reduced, And the production cost of the pig iron can be reduced.

The pulverized coal supply method according to the third aspect of the present invention is preferably such that in the above method, the reformed coal is deactivated to such an extent that its self heating function remains a predetermined amount.

According to this method, since the self-heating action of the reformed carbon is weakened, the necessity of transporting the reformed carbon in a nitrogen atmosphere is suppressed so that the reformed carbon does not spontaneously ignite, and the use rate of the nitrogen supply apparatus can be lowered. Therefore, the operating cost of the blast furnace facility can be reduced, and the production cost of the pig iron can be reduced.

A pulverized coal supplying method according to a fourth aspect of the present invention is a pulverized coal supplying method for pulverizing pulverized coal from a primary bladder of a main body of a blast furnace together with heated and compressed charged air and pulverized coal comprising reformed coal modified with low- The pulverized coal comprising the raw coal which is generally used is mixed and the pulverized coal comprising the raw coal is dried by the self-heating action of the reformed coal.

According to the pulverized coal supplying method, since the pulverized coal made of the raw coal having a moisture content higher than that of the reformed coal is mixed with the pulverized coal made of the reformed coal, the pulverized coal made of the raw coal is dried by the heat of the reformed coal having self- Can be omitted or simplified. As a result, the equipment, energy, personnel, etc. related to the drying process can be reduced to reduce the operating cost of the blast furnace facility, and the production cost of the pig iron can be reduced.

INDUSTRIAL APPLICABILITY As described above, according to the pulverized coal drawing apparatus, the furnace installation having the same, and the pulverized coal supplying method according to the present invention, it is possible to reduce the manufacturing cost of the pig iron by reducing the operation cost of the blast furnace facility.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic block diagram of a blast furnace installation equipped with a pulverized coal receiving device according to a first embodiment of the present invention; FIG.
2 is a schematic block diagram of a blast furnace installation equipped with a pulverized coal receiving device according to a second embodiment of the present invention.
3 is a schematic configuration diagram of a blast furnace installation equipped with a pulverized coal receiving device according to a third embodiment of the present invention.
4 is a schematic block diagram of a blast furnace installation equipped with a pulverized coal receiving device according to a fourth embodiment of the present invention.
5 is a schematic block diagram of a blast furnace installation equipped with a pulverized coal receiving device according to a fifth embodiment of the present invention.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to Figs. 1 to 5. Fig.

[First Embodiment]

Fig. 1 is a schematic configuration diagram of a blast furnace plant 1A including a pulverized coal loading device 5A according to a first embodiment of the present invention. The blast furnace 1A is composed of a blast furnace main body 2, a raw material quantity supply device 3, a loading conveyor 4 and a pulverized coal receiving device 5A.

The blast furnace main body 2 has a general structure, in which a furnace top hopper 7 is formed at its top portion, and a wick 8 and an outlet 9 are formed in a lower portion thereof. A blow pipe 11 is connected to the blowhole 8 and the injection lance 12 is connected to the blow pipe 11 so as to be joined at an oblique angle.

The charging conveyor 4 is installed so as to rise from the vicinity of the base of the blast furnace main body 2 toward the open hopper 7. The downstream end (upper end) of the charging conveyor 4 in the carrying direction is located above the open hopper 7 And a raw material quantity feeder 3 is provided immediately above the upstream end (lower end) in the conveying direction.

The raw material quantitative feeder 3 is configured to feed the raw materials such as iron ore as the main raw material of the pig iron 14 to be smelted in the blast furnace main body 2, the coke as the fuel and the reducing material and the limestone as the impurity removing material at a constant feeding rate The raw materials are charged into the blast furnace main body 2 from the open hopper 7 by the charging conveyor 4 and the smelted pig iron 14 is supplied to the bottom portion of the blast furnace main body 2 Storage. The smeltred pig iron 14 is taken out from the exit 9.

On the other hand, the pulverized coal receiving device 5A blows the pulverized coal (PCI coal), which is the auxiliary fuel, together with the heated and compressed hot air blown air from the bulb 8 (blow pipe 11) of the blast furnace main body 2 , And the temperature in the blast furnace main body 2 is raised. This pulverized coal loading device 5A is provided with a reforming device 16, a loading line 17, a nitrogen gas feeding device 18, a cyclone separator 19, a storage tank 21, a pulverized coal supply pipe 22, (23), and the like.

The reforming device 16 and the cyclone separator 19 are connected by the charging line 17 and the nitrogen gas feeding device 18 is connected to the upstream portion of the charging line 17. [ Between the storage tank 21 and the injection lance 12 is connected by a pulverized coal supply pipe 22. In addition, the hot air blowing air generated by the blowing air feeding device 23 is supplied to the blow pipe 11. [

Although the detailed description of the reforming device 16 is well known in the art, the characteristics of the low-grade carbon such as inexpensive sub-bituminous coal and lignite are modified to be suitable for the auxiliary fuel of the blast furnace body 2 Together with pulverizing it to produce pulverized coal for auxiliary fuel (PCI coal). In the reforming apparatus 16, the low-grade carbon fed from the receiving hopper 24 is dried and heat-treated a plurality of times to cool and remove moisture and volatile components, and is pulverized by the mill, do.

The blowing air feeding device 23 compresses the air sucked from the air suction pipe 25 by a compressor (not shown), and this air is heated to about 1200 ° C. by a heater or a burner (not shown) Is a device for generating high temperature, high pressure and dried blown air for blowing.

The middle portion of the air suction pipe 25 is formed into a helical shape, for example, around the pulverized coal supply pipe 22, and the helical portion serves as a heat exchanger 25a. In the heat exchanger 25a, the heat generated by the self-heating action of the reformed coal passing through the interior of the pulverized coal supply pipe 22 is transferred to a portion requiring heat, for example, And serves as a heat transfer means for transferring the heat.

In the pulverized coal receiving apparatus 5A configured as described above, the pulverized coal made of the reformed carbon modified from the low-grade carbon by the reforming apparatus 16 is sent to the loading line 17 and the nitrogen supplied from the nitrogen gas feeding apparatus 18 Gas and is fed to the cyclone separator 19 in an inert atmosphere of nitrogen gas. The cyclone separator 19 is a kind of centrifugal separator that separates and deaerates nitrogen gas from pulverized coal by centrifugal force, and nitrogen gas is discharged or recovered to the outside. Thereafter, the pulverized coal is stored in the storage tank 21 and supplied to the injection lance 12 from the pulverized coal supply pipe 22 by a required amount.

On the other hand, when the air (ambient air) sucked from the air suction pipe 25 and supplied to the blowing air feed device 23 passes through the heat exchanger 25a formed in the middle of the air suction pipe 25, The temperature is increased by exchanging heat with the heat generated by the self-heating effect of the pulverized coal which is made of the reformed coal which precipitates at a relatively slow speed, and is supplied to the blowing air feeding device 23 while carrying the heat. , And hot air having a high temperature and a high pressure around 1200 DEG C is heated. In short, the blowing air is heat-exchanged with the reforming coal before being compressed and heated by the blowing-in air feeding device 23. [

The pulverized coal (reformed coal) supplied to the injection lance 12 is mixed with the blowing air supplied to the blow pipe 11, and the pulverized coal is ignited and burnt by contacting with the blowing air of the hot air having a high temperature. To form a raceway, thereby burning the coke charged into the blast furnace main body 2. As shown in Fig. As a result, the iron ore charged together with the coke is reduced to iron (charcoal) 14 and taken out from the outlet 9.

The pulverized coal receiving apparatus 5A configured as described above is a pulverized coal which is taken in together with the incoming air heated and compressed from the bulb 8 of the blast furnace main body 2 and is made of reformed carbon which is modified from low- Use pulverized coal. Since the reformed carbon is remarkably lower in price than the raw coal such as bituminous coal generally used, the cost of the auxiliary fuel is lowered, and the operation cost of the blast furnace facility 1A is reduced, thereby reducing the production cost of the pig iron. In addition, the heat of the reformed carbon can be effectively used in other regions requiring heat, contributing to energy saving.

In this embodiment, as one example of the heat transfer means for transferring the heat due to the self-heating action of the pulverized coal produced from the reformed coal to another portion requiring heat, the air introduced into the blowing air feeding device 23 A heat exchanger 25a is formed at an intermediate portion of the air suction pipe 25 through which the air passes and the heat is exchanged with the heat of the pulverized coal passing through the inside of the pulverized coal supply pipe 22. [ Therefore, the blowing air is appropriately heated by heat exchange with the pulverized coal before the blowing.

Therefore, energy such as fuel and electric power consumed for further heating the blown air in the blowing-in air feeding device 23 can be greatly reduced, the operation cost of the blast furnace facility 1A can be further reduced, . ≪ / RTI > In addition, since the heat of the reformed carbon passing through the pulverized coal supply pipe 22 is transferred by the heat exchanger 25a, the reformed carbon is cooled, thereby preventing the reformed carbon from spontaneously igniting.

Particularly, since the cold drawn air before being compressed by the blowing air feeding device 23 is heat-exchanged with the reformed coal, the cooling effect of the reformed coal in the pulverized coal supply pipe 22 is enhanced, The heat generation rate can be increased, and the energy for heating the blown air can be further reduced.

[Second Embodiment]

Fig. 2 is a schematic block diagram of a blast furnace installation 1B equipped with a pulverized coal loading device 5B according to a second embodiment of the present invention.

The pulverized coal drawing device 5B differs from the pulverized coal drawing device 5A of the first embodiment (Fig. 1) in that a heat transfer pipe 32 (heat transferring means) extending from the reforming device 16 And the heat transfer pipe 32 is arranged so as to circulate around the pulverized coal supply pipe 22 a plurality of times and return to the reformer 16 again. The main portion of the heat transfer pipe 32 is the same heat exchanger 32a as the heat exchanger 25a of the pulverized coal drawing device 5A of the first embodiment. Inside the heat transfer pipe (32), fluid serving as a heat medium circulates. The structure of the other parts is the same as that of the pulverized coal drawing machine 5A of the first embodiment, and therefore, the same reference numerals are given to the respective parts, and a description thereof will be omitted.

The heat generated by the self-heating action of the reformed carbon passing through the interior of the pulverized coal supply pipe 22 is thermally transferred to the reforming apparatus 16 by the heat medium flowing in the heat transfer pipe 32 and the heat exchanger 32a . In the reforming apparatus 16, this heat is used, for example, in the step of drying the low-grade carbon. This saves the energy consumed to dry the low-grade carbon.

[Third embodiment]

3 is a schematic configuration diagram of a blast furnace installation 1C including a pulverized coal drawing device 5C according to a third embodiment of the present invention.

The pulverized coal drawing device 5C differs from the pulverized coal drawing device 5A of the first embodiment (Fig. 1) in that the deactivation device 42 (deactivation means) is provided downstream of the reforming device 16, And the structure of the other parts is the same as that of the pulverized coal drawing device 5A. Therefore, the same parts are denoted by the same reference numerals, and a description thereof will be omitted.

In the deactivation device 42, the reforming device modified from the low-grade carbon is deactivated by the reforming device 16 to such an extent that the self-heating action thereof remains a predetermined amount. Specifically, in the deactivation method, the coal that has been carbonized at 300 ° C to 500 ° C in the reforming apparatus 16 and then cooled is exposed to the oxygen-containing processing gas atmosphere in the deactivation device 42, (Permeation) of oxygen is performed. By adjusting the adsorption amount of the oxygen, the degree of the self-heating effect of the reformed carbon can be adjusted.

In this embodiment, in the deactivation device 42, after the deactivation process is completed and the reformed carbon sent to the loading line 17 is heated to a certain degree to self-heat, The degree of processing is set.

Since the self-heating effect of the reformed carbon can be weakened by forming such an inactivation device 42, it is possible to eliminate the necessity of transporting the reformed carbon in a nitrogen atmosphere so that the reformed carbon does not spontaneously ignite, have. Therefore, the operating rate of the nitrogen gas feeder 18 is reduced, the operating cost of the blast furnace 1C is reduced, and the manufacturing cost of the pig iron can be reduced.

[Fourth Embodiment]

Fig. 4 is a schematic configuration diagram of a blast furnace installation 1D equipped with a pulverized coal loading device 5D according to a fourth embodiment of the present invention.

The pulverized coal drawing device 5A differs from the pulverized coal drawing device 5A of the first embodiment (Fig. 1) in that the pulverized coal drawing device 5A is constructed such that, in the pulverized coal drawing device 5A, Only the pulverized coal is supplied to the blast furnace main body 2 while the pulverized coal made of the reformed coal and the pulverized coal made of the generally used raw coal are supplied to the blast furnace main body 2 in this pulverized coal drawing machine 5D It is a point.

A mixing pipe 52 (mixing portion) is formed at a downstream portion of the pulverized coal drawing device 5D and two cyclone separators 19A and 19B are provided in the pulverized coal drawing device 5D. Respectively. The structure of the other parts is the same as that of the pulverized coal drawing machine 5A, so that the same reference numerals are given to the respective parts, and a description thereof will be omitted.

In this pulverized coal drawing apparatus 5D, pulverized coal made of modified carbon modified by the reforming apparatus 16 is supplied to the cyclone separator 19A from the charging line 17. The pulverized coal made of raw coal is supplied to the cyclone separator 19B by a feeder (not shown). In the mixing tube 52, two types of pulverized coal are mixed and stored in the storage tank 21. Thereafter, the two types of pulverized coal are supplied to the blast furnace main body 2 together with the hot air blown air supplied from the blown air feeder 23 via the pulverized coal supply pipe 22 in a mixed state.

In the above configuration, since the pulverized coal made of reformed coal and the pulverized coal made of the raw coal are mixed in the mixing pipe 52, in the mixing pipe 52 and the storage tank 21 and the pulverized coal supply pipe 22 on the downstream side , The moisture contained in the pulverized coal composed of the raw coal is dried by the self-heating action of the pulverized coal made of the reformed coal.

Therefore, the drying process of the pulverized coal made of raw coal or the raw coal itself can be partially omitted or simplified. Thus, the equipment, energy, personnel, etc. related to the drying process of the raw coal can be reduced, and the operating cost of the blast furnace 1D can be reduced, thereby reducing the production cost of the pig iron.

[Fifth Embodiment]

5 is a schematic configuration diagram of a blast furnace installation 1E including a pulverized coal loading device 5E according to a fifth embodiment of the present invention.

The pulverized coal drawing device 5E is provided with the deactivation device 42 formed in the pulverized coal drawing device 5C of the third embodiment (Fig. 3) in the pulverized coal drawing device 5D of the fourth embodiment (Fig. 4) . The reforming device modified from the low-grade carbon by the reforming device (16) is deactivated by the deactivation device (42) to such an extent that the self-heating action thereof remains a predetermined amount. The structure of the other parts is the same as that of the pulverized coal drawing device 5D.

The reformed carbon is completely deactivated in the deactivation device 42 and the pulverized coal composed of the reformed coal and the pulverized coal made of the raw coal is mixed with the mixed gas 52 ) To the blast furnace main body 2 through the pulverized coal supply pipe 22, the moisture contained in the pulverized coal made of the raw coal is dried by the self heating of the pulverized coal made of the reformed coal.

According to this pulverized coal drawing machine 5E, the operation cost of the blast furnace 1E can be reduced by cutting out or partially simplifying the drying process of the raw coal, thereby reducing the equipment, energy, personnel and the like related to the drying process of the raw coal, The manufacturing cost can be reduced.

In addition, since the self-heating effect of the reformed carbon can be weakened by the deactivation device 42, it is possible to eliminate the necessity of conveying the reformed carbon in a nitrogen atmosphere so as not to spontaneously ignite, or to reduce the amount of the nitrogen gas used. Therefore, the operating rate of the nitrogen gas feeder 18 is lowered, and the operating cost of the blast furnace 1E can be reduced also from this point of view, thereby contributing to the reduction of the production cost of the pig iron.

As described above, according to the pulverized coal drawing devices 5A to 5E and the pulverized coal charging method according to the respective embodiments described above, the operation cost of the blast furnace plants 1A to 1E can be reduced, and the manufacturing cost of the pig iron can be reduced .

It is to be understood that the invention is not limited to the details of the embodiments described above and that various changes and modifications may be appropriately made without departing from the spirit of the invention, Are included in the scope of the present invention.

For example, the place where the heat generated by the self-heating of the reformed coal is conveyed may not necessarily be the inside of the blast furnace, and the heat may be transferred to the adjacent plant or another facility. The constitution of each embodiment may be appropriately combined.

1A, 1B, 1C, 1D, 1E: Blast Furnace Facilities
2: Blast furnace body
3: Raw material supply device
4: Loading conveyor
5A, 5B, 5C, 5D, 5E: Pulverized coal drawing device
7: open hopper
8: Wushu
9: Outpost
11: blow pipe
12: Injection lance
14: Pig iron
16: reforming device
17: Loading line
18: Nitrogen gas feeding device
19, 19A, 19B: cyclone separator
21: Storage tank
22: Pulverized coal supply pipe
23: Blower for blown air
24: Receiving hopper
25: air suction pipe
25a: Heat exchanger (heat transfer means)
32: Heat transfer tube (heat transfer means)
32a: Heat exchanger (heat transfer means)
42: Deactivation device (deactivation means)
52: mixing tube (mixing part)

Claims (11)

A pulverized coal drawing apparatus configured to draw pulverized coal together with heated and compressed intake air from a master cylinder of a blast furnace main body,
A reforming apparatus for reforming low-grade carbon and generating a reformed carbon having self-exothermicity,
A pulverized coal supply pipe for supplying the reformed coal discharged from the reforming apparatus to the blast furnace as the pulverized coal,
And heat transfer means for exchanging heat with the pulverized coal supply pipe and transferring the heat generated by the self-heating of the reformed coal to a region requiring heat. The method according to claim 1,
Wherein the heat transfer means is configured to heat exchange the blown air before being compressed with the reformed coal. The method according to claim 1,
And the heat transfer means is configured to transfer heat of the reformed carbon to the reforming apparatus. 4. The method according to any one of claims 1 to 3,
And a deactivation means for deactivating the reformed coal to a degree that the self-heating action remains a predetermined amount. The method according to claim 1,
And a mixing portion for mixing the pulverized coal made of the modified carbon and the pulverized coal made of the generally used raw coal and drying the pulverized coal made of the raw coal by the self heating effect of the mixed portion and the downstream side thereof Pulverized coal intake system. A blast furnace installation equipped with the pulverized coal receiving device according to any one of claims 1 to 5. A pulverized coal supply method for pulverizing coal with heating and compressed intake air from a master cylinder of a blast furnace main body,
A reforming step of reforming the low-grade carbon and generating a reformed carbon having self-
A pulverized coal supply step of supplying the reformed coal as the pulverized coal to the blast furnace,
And a heat transfer step of transferring heat due to the self-heating action of the reformed coal to a site requiring heat by performing heat exchange in the pulverized coal supplying step. 8. The method of claim 7,
And a deactivation step of deactivating the reformed carbon to a degree that the self-heating effect remains a predetermined amount. A pulverized coal supply method for pulverizing coal with heating and compressed intake air from a master cylinder of a blast furnace main body,
A reforming step of reforming the low-grade carbon and generating a reformed carbon having self-
A pulverized coal supply step of supplying the reformed coal as the first pulverized coal to the blast furnace,
A raw coal supplying step of supplying a second pulverized coal made of generally used raw coal to the blast furnace,
And a drying step of mixing the first pulverized coal and the second pulverized coal and drying the second pulverized coal by self-heating of the first pulverized coal. A blast furnace installation equipped with the pulverized coal receiving device according to claim 4. delete

Images