KR101534128B1 - Processing method for raw material, Processing apparatus for raw material and Manufacturing facilities for molten pig iron - Google Patents

Abstract

The present invention relates to a raw material treatment method and an apparatus applied thereto, and facilities for manufacturing a molten iron. The raw material treatment method of the present invention comprises the steps of: preparing a raw material containing slaked lime in a reaction bath; preparing coal and reduced iron in a melting furnace to melt the same; supplying reduced gas generated from the melting furnace to the reaction bath; manufacturing quicklime by making the reduced gas react with the raw material; and receiving the reduced gas used for manufacturing the quicklime from the reaction bath to cool the same. Accordingly, the method of the present invention enables to manufacture quicklime from the raw material by receiving waste heat from the facilities for manufacturing the molten iron, wherein the facilities for manufacturing the molten iron has improved heat efficiency by being equipped with the raw material treatment apparatus.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material processing method, a raw material processing apparatus,

The present invention relates to a raw material treatment method, a raw material treatment apparatus and a molten iron production facility, and more particularly, to a raw material treatment method for producing quicklime from a raw material by receiving waste heat from a molten iron manufacturing facility, And more particularly, to a charcoal manufacturing facility equipped with a treatment device and improved in heat efficiency.

The iron-making equipment applied to the FINEX process or the COREX process includes a reducing furnace for supplying and reducing iron ore and a melting furnace for supplying reduced iron ore to melt. The inside of the melting furnace is provided with a coal packed bed, and the coal packed bed is burnt in the melting furnace to generate a hot reducing gas. The reducing gas at a high temperature generated in the melting furnace is mixed with a cooling gas at room temperature and then supplied to a cyclone to recover the coal blended into the reducing gas. The coal collected in the cyclone is introduced into the melting furnace. A part of the reducing gas passing through the cyclone and removing the coal is supplied to the reducing furnace at a high temperature, and the remainder is supplied to a wet scrubber to be cooled. Reduced gas supplied to the reduction furnace is used in the process of reducing iron ore. The reducing gas supplied to the wet scrubber and cooled to room temperature is used in the process of cooling the reducing gas mixed with the high-temperature reducing gas generated in the melting furnace and supplied to the cyclone. The high temperature heat released from the reducing gas while the reducing gas passes through the wet scrubber can not be recovered to the equipment but is absorbed into the water used as the refrigerant in the wet scrubber and discarded.

The quicklime production facility is provided with a calcining furnace which is supplied with limestone and calcines in a high temperature atmosphere. The quicklime produced in the calcining furnace is supplied to the steelmaking plant and used as an additive for heating and refining the molten iron. The dust generated in the process of calcining limestone is collected in the water sprayed by the dust collecting device. The collected dusts react with water to produce lime lime sludge. The resulting lime lime sludge is not utilized in the facility and is transported to the outside for cement production or landfilling.

Accordingly, there is a demand for a new method for improving the productivity of the quicklime production facility and the energy efficiency of the charcoal manufacturing facility by utilizing the high-temperature heat that is discarded in the process of cooling the reducing gas for the treatment of the lime sludge.

On the other hand, the technology as a background of the present invention is disclosed in Korean Patent Registration No. 10-1428382 (Apr. 2014.08.01) and Korean Registered Patent No. 10-0775758 (Nov.

KR 10-1428382 B1 KR 10-0775758 B1

The present invention provides a raw material treatment method capable of producing quicklime from a raw material by receiving waste heat from a molten iron manufacturing facility and a raw material treatment apparatus applied thereto.

The present invention provides a molten iron manufacturing facility with improved thermal efficiency by providing a raw material treatment device capable of recovering heat from gas circulating inside the facility.

A raw material treatment method according to an embodiment of the present invention comprises the steps of: preparing a raw material containing slaked lime in a reaction tank; A process in which coal and reduced iron are prepared and melted in a melting furnace; Supplying a reducing gas generated in the melting furnace into the reaction tank; Reacting the reducing gas with the raw material to produce quicklime; And a process of cooling the reducing gas discharged from the reaction tank after the production of the quicklime and cooling the same.

Reducing the temperature of the reducing gas by mixing the cooling gas generated by cooling the reducing gas used in the manufacturing of the quicklime and the reducing gas discharged from the melting furnace before the reducing gas is supplied into the reaction tank; And a step of collecting and removing the coal powder mixed in the reduced reducing gas.

The temperature of the reducing gas supplied to the reaction tank may be 700 ° C. to 850 ° C., the temperature of the reducing gas discharged from the reaction tank may be 500 ° C. or lower, and the temperature of the cooling gas may be 100 ° C. or lower.

A raw material processing apparatus according to an embodiment of the present invention includes: a reducing gas inlet pipe connected to a melting furnace; A reaction tank having therein a space for containing a raw material containing slaked lime and connected to the reducing gas inlet pipe; And a reducing gas discharge pipe connected to the reaction tank, wherein the molten furnace is supplied with coal and reduced iron to generate a molten iron and a reducing gas.

A molten iron manufacturing facility according to an embodiment of the present invention includes a melting furnace for melting molten reduced iron to produce molten iron and a reducing gas; A raw material processing apparatus including a reducing gas inlet pipe connected to the melting furnace, a reaction tank connected to the reducing gas inlet pipe, and a reducing gas discharge pipe connected to the reaction tank; A collecting device installed to connect between the melting furnace and the reducing gas inlet pipe to collect dust; A cooler connected to the reducing gas discharge pipe to cool the reducing gas discharged from the reaction tank; And a compressor installed to connect between the cooler and the collector, and supplying a cooling gas to the collector, wherein the reaction vessel has a space in which the raw material containing slaked lime is received.

An induction pipe whose one end is connected to one side of the reducing gas inflow pipe; And a reducing furnace connected to the other end of the induction pipe and supplied with the reducing gas to produce reduced iron.

The collector may include a cyclone, and the cooler may include a wet scrubber.

According to the embodiment of the present invention, it is possible to manufacture quicklime from a raw material by receiving waste heat from a charcoal manufacturing facility. At this time, the heat recovered from the gas circulating in the charcoal manufacturing facility is used as a heat source for manufacturing the quicklime, thereby improving the heat efficiency of the charcoal manufacturing facility. In addition, as a raw material for producing quicklime, it is possible to utilize the sludge sludge as a by-product generated in the quicklime production facility, thereby improving the productivity of the process for manufacturing quicklime. That is, according to the embodiment of the present invention, it is possible to improve both the thermal efficiency of the charcoal manufacturing facility and the productivity of the quicklime production process.

1 is a flowchart of a raw material processing method according to an embodiment of the present invention.
2 is a conceptual diagram of a molten iron manufacturing facility equipped with a raw material disposal apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail 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. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. The drawings may be exaggerated in size to illustrate embodiments, and like reference numerals in the drawings designate like elements.

FIG. 1 is a flowchart for explaining a raw material disposal method according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram schematically showing a charcoal manufacturing facility equipped with a raw material disposal apparatus according to an embodiment of the present invention.

Referring to FIG. 2, a molten iron manufacturing facility equipped with a raw material disposal apparatus according to an embodiment of the present invention is applicable to FINEX or COREX processes. Iron ore and reduced gas are supplied to manufacture reduced iron A reducing gas inlet pipe 410 connected to the melting furnace 200 and a reducing gas inlet pipe 410 connected to the reducing gas inlet pipe 410. The reducing furnace 100 includes a heating furnace 200, And a reducing gas discharge pipe 430 connected to the reaction tank 420. The collector 300 is connected to the reducing gas inlet pipe 410 by connecting the melting furnace 200 and the reducing gas inlet pipe 410, A cooler 500 connected to the reducing gas discharge pipe 430 and a compressor 600 connected between the cooler 500 and the collecting device 300. The compressor 600 is connected to one side of the reducing gas inlet pipe 410, And an induction tube 700 whose other end is connected to the reducing furnace 100.

The reducing furnace 100 is a component provided to reduce or receive the iron ore in the form of spectroscopic or photochromic iron containing iron oxide. A processing space is formed in the reducing furnace 100 to receive iron ore and perform a reduction treatment. A furnace inlet for supplying iron ores into the processing space is formed at one side of the upper portion of the reducing furnace 100 by connecting the inside and the outside of the reducing furnace 100. A side wall of the reducing furnace 100 is connected to a melting furnace 200 (Not shown) for supplying a reducing gas at a predetermined temperature, for example, 700 ° C to 850 ° C, to the processing space is formed by connecting the inside and the outside of the reducing furnace 100. The iron ores supplied into the processing space of the reduction furnace 100 are reduced by the oxidation reaction of a predetermined component such as a carbon monoxide component contained in the reducing gas. The reduced iron ore, for example, reduced iron in the treatment space of the reduction furnace 100 may be discharged to the discharge unit 110 connected to the lower side of the reduction furnace 100.

The discharging unit 110 is provided to connect the processing space of the reducing furnace 100 and the storage space of a melting furnace 200 to be described later. A passage through which the reducing iron passes is formed in the discharging unit 110, The reduced iron can be uniformly supplied into the storage space of the melting furnace 200 through the passage.

In the present embodiment, the configuration and the manner of the reducing furnace 100 and the discharging unit 110 are not particularly limited. The reduction furnace 100 may be formed in various configurations and systems that can supply iron ore to the inside thereof and can be manufactured from a reduced iron. The discharge unit 110 includes a reduction furnace 100 for supplying the reduced iron to the melting furnace 200 And may be formed in various configurations and methods that can be constantly supplied into the storage space.

The melting furnace 200 is a component to be supplied with coal and reduced iron and is manufactured as a molten iron. Inside the melting furnace 200, a reducing space is formed in which the reduced iron produced in the reducing furnace 100 is accommodated and melted. For example, a lower region in which coal is stored and an upper region in which a reducing gas having a high temperature, for example, 1000 ° C or more, is generated. The upper part of the storage space of the melting furnace 200 is formed in a dome shape so as to facilitate the reduction of the flow rate of the reducing gas introduced into the upper area. By reducing the flow rate of the reducing gas, the reducing gas exhaust pipe 210, And is prevented from being lost. A discharge unit 110 for supplying reduced iron to the storage space is connected to one side of the upper portion of the melting furnace 200. A reducing gas exhaust pipe for exhausting the reducing gas in the storage space to the collecting unit 300, (Not shown). The coal filling layer provided in the lower region of the storage space is burnt by a heating means (not shown) provided to be able to heat the inside of the storage space to generate hot heat and reducing gas. Reduced iron supplied into the storage space of the melting furnace 200 is melted and reduced in the storage space by the hot heat and the reducing gas generated in the coal filling layer in the lower region of the storage space, During the production of the molten iron, the reducing gas generated in the coal-filled layer in the lower region of the storage space may be led to the upper region of the storage space and exhausted to the reducing gas exhaust pipe 210.

The reducing gas exhaust pipe 210 is a component provided to connect the upper space of the storage space of the melting furnace 200 and a collecting device 300 described later. A path through which the high-temperature reducing gas passes is formed in the reducing gas exhaust pipe 210 , The reducing gas is constantly supplied into the trapping unit 300, which will be described later, through the passage.

In the present embodiment, the configuration and the manner of the melting furnace 200 and the reducing gas exhaust pipe 210 are not particularly limited. The reducing gas exhaust pipe 210 is connected to the reducing gas exhausted from the melting furnace 200 into a collecting container 300 to be described later, And can be formed in various configurations and schemes that can be constantly supplied.

The reducing gas generated in the melting furnace 200 and exhausted to the reducing gas exhaust pipe 210 is a strong reducing gas produced by combustion of coal in the melting furnace 200 and has carbon monoxide and hydrogen as main components. In the process in which the reducing gas is introduced into the upper region from the lower storage region of the melting furnace 200, various dusts including pulverized coal and powdered iron originating from the coal filling layer are mixed in the reducing gas, The collector 300 is connected to the reducing gas exhaust pipe 210.

Meanwhile, the reducing gas flowing into the reducing gas exhaust pipe 210 from the storage space of the melting furnace 200 has a high temperature, for example, 1000 ° C or higher. When the high-temperature reducing gas is supplied to the collecting device 300, Thermal damage due to a reducing gas at a high temperature may occur. To prevent this, in the present embodiment, the cooling gas at room temperature is supplied from the cooling gas exhaust pipe 620, which is connected to the reducing gas exhaust pipe 210, to be mixed with the hot reducing gas in the reducing gas exhaust pipe 210, The temperature of the high-temperature reducing gas is controlled to a predetermined temperature, for example, 700 to 850 占 폚. From this, the trapping device 300 can be supplied with a reducing gas controlled at a predetermined temperature, for example, 700 ° C to 850 ° C, instead of a high-temperature reducing gas controlled at a temperature of 1000 ° C or higher. So that the thermal damage of the collector 300 can be prevented. Here, the cooling gas at room temperature, which is mixed with the reducing gas at a high temperature, is generated at a high temperature, which is generated in the melting furnace 200 and circulates or flows inside the charcoal manufacturing facility, except for a part of the reducing gas supplied to the reducing furnace 100 And the remaining reducing gas may be a gas that is produced by cooling to room temperature through a cooler 500 to be described later.

The collector 300, such as Cyclone, receives the reducing gas controlled at a predetermined temperature from the reducing gas exhaust pipe 210, circulates the reducing gas therein, and collects various dusts such as pulverizing and pulverizing iron from the reducing gas. The reducing gas passing through the collecting device 300 and collecting dust and the like is supplied to the reducing furnace 100 and the raw material processing apparatus 400 described later. The various dusts collected in the collecting device 300 are respectively sorted by a sorter (not shown) formed so as to be able to select pulverized coal and pulverized iron from the collected dust, and the selected pulverized coal and pulverized coal are collected by a sorter 300 and a melting furnace 200, and is supplied into the melting furnace 200 to be respectively burned and melted.

The raw material processing apparatus 400 receives a reducing gas whose temperature is controlled at a predetermined temperature, for example, 700 ° C to 850 ° C from the collector 300, and firstly reduces the reduced gas to a temperature of 500 ° C or less, Is used to produce quicklime from the raw material by utilizing the heat recovered from the raw material. On the other hand, as the reducing gas is controlled at a temperature of 700 ° C. to 850 ° C. as described above, not only the thermal damage of the trapping device 300 is prevented, but also the thermal decomposition reaction of the slaked lime component in the reaction tank 420 can actively proceed have. The raw material processing apparatus 400 includes a reducing gas inlet pipe 410 connected to the melting furnace 200 through a collector 300 and a reaction space in which a raw material containing slaked lime is received and a reducing gas inlet pipe 410 And a reducing gas discharge pipe 430 connected to the reaction tank 420. The reducing gas at a predetermined temperature to be supplied to the cooler 500 may be supplied to the cooler 500), and is used to produce quicklime from sludge sludge, which is an industrial by-product, by using the waste heat while cooling the reducing gas first.

The reducing gas inlet pipe 410 is provided to connect the collector 300 and the reaction tank 420. A path through which the reducing gas of a predetermined temperature passes is formed in the reducing gas inlet pipe 410, And is constantly supplied into the reaction tank 300 through the passage.

The reaction vessel 420 is formed to receive the raw material and the reducing gas at a predetermined temperature to produce quicklime from the raw material. Inside the reaction vessel 420, a raw material is stored and a reaction space through which the reducing gas flows . The reaction space may be formed at an atmospheric temperature of, for example, 580 DEG C or higher by a reducing gas at a predetermined temperature, for example, 700 DEG C to 850 DEG C, supplied to the reaction space, and the slaked lime component contained in the raw material fed into the reaction space, The hydroxyl group (OH) component can be completely decomposed from the component and made into quicklime. The burnt lime produced in the reaction space can be transferred to the process of manufacturing a fine-formed briquette to be reused as a binder.

In the present embodiment, the construction and the method of the reaction tank 420 are not particularly limited, and the reaction tank 420 may be formed in various configurations and systems capable of manufacturing the quicklime from the raw material supplied thereto.

The raw material supplied to the interior of the reaction tank 420 may include sludge sludge as a by-product generated in a calcination process using a quicklime production facility. Of course, the raw material may be various industrial by-products containing slaked lime and slaked lime components, and for the sake of convenience of explanation, the slaked lime sludge is exemplified as a raw material.

The calcium sulphate (Ca (OH) ₂ ) sludge is used, for example, in order to collect dust or fine calcium deposits scattered to the outside during the production of quicklime, water is injected at a predetermined position of the quicklime production facility, Or a byproduct in the quicklime storage tank is a byproduct produced by binding with moisture in the atmosphere. When the slaked lime is mixed with the lime slurry and supplied to the steelmaking process, the slaked lime sludge can be introduced into the molten steel, and the slaked lime sludge introduced into the molten steel may cause the product failure such as breakout and hydrogen embrittlement in the continuous casting process and rolling process . Thus, in the past, the lime lime sludge was collected in various ways in the process of manufacturing quick lime and excluded from the burnt lime, and the collected lime lime sludge was transferred to the outside for cement production or landfilling.

However, the lime slurry can be decomposed into water and quick lime again at an atmospheric temperature of, for example, 580 DEG C or higher. In the process of manufacturing molten iron in the charcoal manufacturing facility according to the embodiment of the present invention, The raw material processing apparatus 400 is provided with the raw material processing apparatus 400 capable of manufacturing the quicklime from the raw material by receiving the waste heat from the reducing gas, The productivity of the process and the heat efficiency of the wire manufacturing process can be increased together.

The reduction gas discharge pipe 430 is connected to the reaction tank 420 and the cooler 500. The reducing gas discharge pipe 430 is connected to the reducing gas discharge pipe 430 through a reaction tank 430, A passageway through which the gas passes is formed and the primary cooled reduced gas is constantly fed into the cooler 500 through the passageway.

The cooler 500, for example, a wet scrubber is a wet scrubber using water as a refrigerant. The wet scrubber is a wet scrubber that uses water as a refrigerant. The wet scrubber is a reducing gas that is primarily cooled to a temperature of 500 ° C or lower, And it is secondarily cooled at a temperature of 100 DEG C or less or at a temperature of 20 DEG C to 30 DEG C or at room temperature. In this embodiment, a cooler 500 for cooling the primary cooled down gas to a temperature of 100 ° C or lower is exemplified. In the process of cooling the primary cooled reduced gas to a temperature of 100 ° C or below and generating it as a cooling gas, the dust in the reducing gas can be completely removed by water as a refrigerant, and the gas cooled to a temperature of 100 ° C or less And may be supplied to a compressor 600 described later. On the other hand, in the present embodiment, since the cooler 500 is cooled by receiving the reducing gas that is first cooled, the cooling efficiency can be improved and the use of the coolant can be reduced.

The gas compressor 600 is installed to connect between the cooler 500 and the collector 300. The cooler 500 is supplied with cooling gas cooled to a temperature of 100 ° C or lower and is supplied to the reduction gas exhaust pipe 210 And a collecting device 300 connected thereto. In the present embodiment, the construction and the method of the compressor 600 are not particularly limited, and they can be formed in various configurations and systems capable of compressing various fluids and sending them at a predetermined pressure.

A cooling gas intake pipe 610 is installed in the inlet of the compressor 600 and can be connected to the cooler 500. A cooling gas exhaust pipe 620 is installed at an outlet of the compressor 600, And the gas exhaust pipe 210 may be connected to each other. A gas flow can be formed inside the reducing gas exhaust pipe 210, the reducing gas inlet pipe 410, the reducing gas exhaust pipe 430 and the cooling gas exhaust pipe 610 by the operation of the compressor 600.

The cooling gas exhaust pipe 620 is connected to one side of the reducing gas exhaust pipe 210. The cooling gas supplied through the cooling gas exhaust pipe 620 and supplied into the reducing gas exhaust pipe 210 is mixed with the hot reducing gas discharged from the melting furnace 200 to the reducing gas exhaust pipe 210, Is reduced to a predetermined temperature, so that the thermal load of the collecting pipe 400 is reduced and damage is prevented.

The induction pipe 700 has one end connected to the reducing gas inlet pipe 410 of the raw material processing apparatus 400 and the other end connected to the gas inlet of the reducing furnace 100, For example, 700 ° C to 850 ° C, into the reducing furnace 100. A passage through which the high-temperature reducing gas can pass may be formed in the induction pipe 700, and a control valve (not shown) may be provided at one end of the induction pipe 700 to control the flow rate and flow rate of the reducing gas. have.

Hereinafter, a raw material processing method according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. Herein, contents overlapping with the above description of the charcoal manufacturing facility according to the embodiment of the present invention will be briefly described or omitted.

The raw material disposal method according to an embodiment of the present invention includes a process of preparing a raw material containing slaked lime in a reaction tank 420, a process of providing coal and reduced iron in a melting furnace 200 to be melted, A process of producing a quicklime by reacting a reducing gas with a raw material, a process of producing a quicklime or a reducing gas discharged from a reaction tank 420 after the process of manufacturing quicklime is completed, And reducing the amount of the reducing gas used in the production.

The process of supplying the reducing gas generated in the melting furnace 200 into the reaction tank 420 after the process of preparing the raw material in the reaction tank 420 and the process of providing the coal and the reduced iron in the melting furnace 200 and melting the same are completed, Before proceeding, the following procedure can be further performed. That is, before the reducing gas is supplied into the reaction tank, a process of reducing the temperature of the reducing gas by mixing the cooling gas produced by cooling the reducing gas used in the production of the quicklime and the reducing gas generated and discharged from the melting furnace can be performed . Then, the step of collecting and removing the coal powder mixed in the reduced reducing gas can be performed.

First, a raw material such as slaked lime sludge is provided in the reaction tank 420 (S100). At this time, the raw material may be in a dried state or in a state containing moisture. The raw material may be stored in a reservoir (not shown) provided separately on the outside of the reaction tank 410 and may be uniformly supplied to the reaction tank 410.

Next, coal and reduced iron are provided in the melting furnace 200 and melted (S200). The details are as follows. The coal filling layer provided in the melting furnace 200 is first burnt to generate a hot reducing gas inside the melting furnace 200 and the generated reducing gas is supplied to the trapping unit 300, ) To the reducing furnace (100). At this time, when the flow rate of the reducing gas flowing into the reducing gas inlet pipe 410 through the collector 300 is taken as 100%, the flow rate of the gas supplied to the reducing furnace 100 is 80% And the remainder 20% of the reducing gas can circulate in the charcoal manufacturing facility and be cooled and used as cooling gas. Inside the reduction furnace 100, iron ore is provided, and the iron ores react with the reducing gas and are made of reduced iron. The produced reduced iron passes through the discharge portion 110 and is supplied to the melting furnace 200 and melted in the melting furnace 200 to be produced as a molten iron.

Next, the reducing gas generated in the melting furnace 200 is supplied into the reaction tank 420 (S300). At this time, the process of collecting and removing the coal blended in the reducing gas may be performed before supplying the reducing gas into the reaction tank 420. That is, the reducing gas generated in the melting furnace 200 is removed through the collector 300 before being supplied to the reaction tank 420 of the raw material processing apparatus 400. Also, the process of reducing the temperature of the reducing gas to a predetermined temperature by mixing the cooling gas and the reducing gas, which are generated by cooling the reducing gas used in the production of the quicklime, before the step of collecting and removing the coal powder contained in the reducing gas . So that the thermal damage of the collector 300 can be prevented.

Here, the cooling gas is a gas circulating inside the charcoal manufacturing facility. That is, a part of the reducing gas generated in the melting furnace 200 and supplied to the collecting device 300 and the reducing gas inlet pipe 410 is supplied to the reducing furnace 100, and the remainder is supplied to the raw material treating device 400 and the cooler 500 And the compressor 600 are sequentially cooled and then supplied to the reducing gas exhaust pipe 210 and then introduced into the collector 300 and circulated.

The reducing gas at a high temperature, for example, 1000 ° C or higher, produced in the melting furnace 200 is mixed with a cooling gas at a temperature of 100 ° C or lower and the temperature is controlled to a predetermined temperature, for example, 700 ° C to 850 ° C. .

Subsequently, the reducing gas supplied into the reaction tank 420 is reacted with the slaked lime sludge to produce calcium oxide (S400). That is, when a reducing gas whose temperature is controlled to a predetermined temperature, for example, 700 ° C. to 850 ° C., is supplied into the reaction tank 420 and the atmosphere temperature in the reaction tank 420 is set at 700 ° C. to 850 ° C., Hydroxide (OH) is decomposed from the supplied lime lime sludge and is made of burnt lime. At this time, the reducing gas can be firstly cooled to a temperature of 500 캜 or lower.

Next, the reducing gas used in the production of the quicklime after passing through the reaction tank 420 is passed through the cooler 500 and is secondarily cooled to room temperature (S500). The cooling gas, which is formed through cooling through the cooler 500 and cooled to room temperature, is transferred by the compressor 600 and mixed with the high-temperature reducing gas in the reducing gas exhaust pipe 210 and circulated.

In the embodiment of the present invention, the raw material disposal method and the raw material disposal apparatus applied to the molten iron manufacturing facility for producing molten iron using FINEX, COREX, It is possible to improve the heat efficiency and the productivity of quicklime of the charcoal manufacturing facility by preparing quicklime from the raw materials supplied.

Although the above embodiment of the present invention is applied to the case of a charcoal manufacturing facility, the present invention can be applied to a process of processing various raw materials using waste heat of a facility for processing various processed products. It should be noted, however, that the above-described embodiments of the present invention are for the purpose of explanation of the present invention and not for the purpose of limitation. It is to be understood that various modifications may be made by those skilled in the art without departing from the scope of the present invention.

100: Reduction furnace 200: Melting furnace
300: collector 400: raw material processing device
420: Reactor 500: Cooler
600: compressor 700: induction pipe

Claims (7)

Preparing a raw material containing slaked lime in a reaction tank;
A process in which coal and reduced iron are prepared and melted in a melting furnace;
Supplying a reducing gas generated in the melting furnace into the reaction tank;
Reacting the reducing gas with the raw material to produce quicklime; And
And a reducing gas discharged from the reaction tank after the production of the quicklime is supplied and cooled.
The method according to claim 1,
Before the process of supplying the reducing gas into the reaction vessel,
Reducing the temperature of the reducing gas by mixing the cooling gas generated by cooling the reducing gas used in the quicklime and the reducing gas discharged from the melting furnace; And
And collecting and removing the coal blended in the reducing gas whose temperature has been lowered.
The method of claim 2,
The temperature of the reducing gas supplied to the reaction tank is 700 ° C to 850 ° C,
The temperature of the reducing gas discharged from the reaction tank is 500 DEG C or lower,
Wherein the temperature of the cooling gas is 100 DEG C or lower.
A reducing gas inlet pipe connected to the melting furnace;
A reaction tank having therein a space for containing a raw material containing slaked lime and connected to the reducing gas inlet pipe; And
And a reducing gas discharge pipe connected to the reaction tank,
Wherein the molten furnace is supplied with coal and reduced iron to generate molten iron and a reducing gas.
A melting furnace for melting the reduced iron to produce a molten iron and a reducing gas;
A raw material processing apparatus including a reducing gas inlet pipe connected to the melting furnace, a reaction tank connected to the reducing gas inlet pipe, and a reducing gas discharge pipe connected to the reaction tank;
A collecting device installed to connect between the melting furnace and the reducing gas inlet pipe to collect dust;
A cooler connected to the reducing gas discharge pipe to cool the reducing gas discharged from the reaction tank; And
And a compressor mounted to connect between the cooler and the collecting device to supply the cooling gas to the collecting device,
Wherein the reaction tank has a space therein for containing a raw material containing slaked lime.
The method of claim 5,
An induction pipe whose one end is connected to one side of the reducing gas inflow pipe; And
And a reducing furnace connected to the other end of the induction pipe and supplied with the reducing gas to produce reduced iron.
The method of claim 6,
The collector includes a cyclone,
Wherein the cooler comprises a wet scrubber.

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