KR20040039079A - Method and apparatus for processing electric arc furnace dust - Google Patents

Abstract

PURPOSE: An electric arc furnace dust treating apparatus is provided which recovers zinc (Zn) and iron (Fe) in the metal state from constituents of the electric arc furnace dust generated during steelmaking operation in an electric arc furnace, and an electric arc furnace dust treating method corresponding to operation of the apparatus is provided. CONSTITUTION: The apparatus for treating EAFD (electric arc furnace dust) comprises a cleaning means for removing chloride constituent that is a valuable metal recovery interrupting constituent contained in the EAFD; a granulator(20) for granulating the mixture into a certain size by mixing the chloride constituent removed EAFD, coke and limestone; a dryer(30) for drying the granulated raw material; a melting furnace(40) for respectively discharging the separated iron and zinc by separating iron in the molten state and separating zinc in the gas state by reducing the dried raw material at a certain temperature using coke; and a separation means for solidifying gas phase zinc into liquid phase by rapidly cooling the discharged zinc reduced gas using a lead spraying solution having a certain temperature, and manufacturing zinc in the metal state by separating the solidified zinc liquid and lead solution from each other, wherein the apparatus further comprises a refining means for performing refining process for increasing purity of the zinc in the metal state manufactured by the separation means, wherein the cleaning means is a solid/liquid separator(10), and wherein the separation means comprises a condenser(50) for converting gas phase zinc into liquid phase zinc, and a separator(60) for separating zinc and lead solution from zinc vapor collected lead solution.

Description

Steelmaking dust treatment apparatus and method for electric furnace {Method and apparatus for processing electric arc furnace dust}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating electric arc furnace dust (hereinafter referred to as EAFD) and a method thereof, wherein zinc (Zn) and iron (Fe) in a metal state among the components of EAFD generated during an electric furnace steelmaking operation. The present invention relates to an electric furnace EAFD treatment apparatus and a method for recovering the same.

In general, EAFD is composed of oxide, iron, zinc oxide, silica, calcium oxide, etc., and it is a specific waste that contains a large amount of pollutants such as oxidation and cadmium oxide. It must be handled by appropriate methods.

Globally, the treatment method of EAFD combines recovery of valuable metals such as Zn and Fe contained in the EAFD, detoxification treatment and landfill treatment.

Unfortunately, in Korea, there is no valuable metal recovery technology, which is an appropriate treatment method for EAFD, which generates 300,000 tons per year, so most of the amount is landfilled, and about 60,000 tons and 10,000 tons of zinc and lead, which are valuable resources contained in EAFD, It is being buried together.

The recovery of metal zinc, iron, and lead from landfilled EAFDs, which can be used as effective resources, can reduce the cost of waste disposal and contribute to economic recovery of valuable metal resources from waste.

Globally, the recovery of valuable metals from EAFD is carried out by the wet method and the dry method. The appropriate process is adopted according to the circumstances and circumstances of each country.

However, Korea has not yet adopted the proper treatment method of EAFD due to the large investment cost and technical difficulties in the treatment of EAFD.

Therefore, in order to increase domestic electric furnace companies' continuous growth and recycling of effective resources, it is urgent to secure the most economical, environmentally harmless, and resource-efficient treatment methods in view of domestic conditions.

There are two techniques for recovering valuable metals from EAFD: wet method and dry method.

The wet method is a process that produces about 80% of the globally produced zinc metals, which leach zinc concentrate with sulfuric acid and hydrochloric acid to produce metal zinc using electrical force. However, this method is not used as a method for producing metal zinc in EAFD.

As a result of investigating the state of the compound of zinc contained in the EAFD, about 60-70% is present in the form of oxide, and about 20-30% is present in the insoluble ZnFe ₂ O ₄ (Zinc Ferrite) state. It is known that the recovery rate and economical efficiency are poor.

Dry methods include the Waelz method using Kiln, the plasma method using an electric furnace, and the electric furnace method using electric furnaces, which account for about 80% of the EAFD processing methods that are processed worldwide.

The Waelz process is a method developed at the German Waelz plant, and it is a method of recovering 60-70% of zinc oxide (ZnO) with a reduction and oxidation process in a Rotry Kiln by mixing EAFD with coke and limestone. .

The produced zinc oxide is then refined in a zinc refining plant and is made of zinc in the form of metal used for industrial activities. Therefore, in the dry method, metal zinc is produced through two processes, and thus, a large investment cost and economical efficiency are deteriorated.

Therefore, the present invention has been made in order to solve the above problems, an object of the present invention, the electric furnace for recovering the metal state of zinc (Zn), iron (Fe), etc. among the components of the EAFD generated during the steelmaking operation An EAFD processing apparatus is provided.

In addition, another object of the present invention is to provide a method for treating steelmaking dust with an electric furnace corresponding to the operation of the apparatus.

1 is a view showing a connection configuration for an electric furnace steel dust treatment apparatus according to the present invention.

2 is a flowchart illustrating an operation of an electric furnace steelmaking dust treatment method according to the present invention;

Explanation of symbols on the main parts of the drawings

10: solid / liquid separator 20: granulator

30: dryer 40: melting furnace

50: condenser 60: separator

70: refiner 80: combustion tower

90 heat exchanger 100 dust collector

110: stack

Electrical furnace steel dust treatment apparatus and method according to the present invention for achieving the above object is to harmless EAFD and economically produce zinc and iron in the metal state, the process of the EAFD first cleaning process Cl and Na, which act as interferences, are removed, and EAFD from which Cl and Na are removed is reduced and gasified in a melting furnace with reducing agents such as coke at 1000-1500 ° C. By recovering zinc in the metal state rather than zinc (ZnO), the method of producing zinc in the metal state in the secondary zinc refining plant after the production of primary zinc oxide, which is a problem with the existing dry method, is reduced to one economically. It is characterized by the fact that it can be processed and resourceized.

According to an aspect of an electric furnace steel dust treatment apparatus according to the present invention, the cleaning means for removing the chlorine component which is a valuable metal recovery interference component contained in the EAFD; Granulating means for granulating the EAFD from which the chlorine component is removed, coke and limestone through the washing means, and granulating the coarse and limestone to a predetermined size; Drying means for drying the granulated raw material through the granulating means; Dissolving means for reducing the dried raw material by using coke at a predetermined temperature to separate iron in a molten state and zinc in a gaseous state and to discharge them respectively; By using the lead spray liquid of a predetermined temperature to the discharged zinc reducing gas to rapidly cool the zinc of the gas phase to the liquid phase, and separating the solidified zinc liquid and lead solution, respectively, may include a separation means for producing zinc in the metallic state have. Here, the chlorine component to be cleaned in the cleaning means may include at least one or more of the Cl, Na component.

Further comprising a refining means for performing a refining process to increase the purity of the metal zinc state produced by the separating means.

The cleaning means, by mixing the EAFD and water to dissolve the chlorine components contained in the EAFD and transfer the dissolved liquid chlorine components to the wastewater treatment device, the solid state EAFD through the conveyor, such as coke and limestone Solid / liquid separator which is discharged to the granulating means.

The said drying means can use the waste gas of a hermetically sealed melting furnace.

And the dissolving means, by heating the raw material dried through the drying means to a temperature of about 1000-1500 ℃ coke is produced in the CO under reducing conditions, the iron oxide and zinc oxide is reduced to the metal state by the generated CO gas Be sure to

The separating means injects a lead solution of about 400 ° C. to the metal reducing zinc gas provided from the dissolving means to drastically reduce the temperature inside the apparatus, so that the gaseous zinc vapor is trapped in the lead solution to form a gaseous phase. A condenser for converting zinc into liquid zinc; A zinc solution provided from the condensation means may include a separator separating zinc lead and zinc solution from each other.

Further, according to another aspect of the electric furnace EAFD treatment apparatus according to the present invention, the cleaning means for removing the chlorine component which is a valuable metal recovery interference component contained in the EAFD; Granulating means for granulating the EAFD from which the chlorine component is removed, coke and limestone through the washing means, and granulating the coarse and limestone to a predetermined size; Drying means for drying the granulated raw material through the granulating means; Dissolving means for reducing the dried raw material by using coke at a predetermined temperature to separate iron in a molten state and zinc in a gaseous state and to discharge them respectively; A lead solution of about 400 ° C. is sprayed onto the zinc reducing gas in the metal state provided by the dissolution means to drastically reduce the temperature inside the apparatus, so that the gaseous zinc vapor is collected in the lead solution, thereby converting the gaseous zinc into liquid zinc. Cooling means for converting to; Separating means for separating the lead solution trapped with zinc vapor provided from the cooling means into zinc and lead solution; Refining means for performing a refining process to increase the purity of the metal zinc state produced by the separating means.

In addition, according to one aspect of the electric steelmaking dust treatment method according to the present invention, the step of washing the EAFD by mixing the EAFD and water to remove the chlorinated material as a valuable metal recovery interference component contained in the EAFD; Granulating the EAFD from which the chlorinated material is removed through the washing process, coke, and limestone to a predetermined size; Drying the granulated raw material using waste gas in a closed melting furnace; The dried raw material is reduced by using coke to reduce the EAFD at a temperature of 1000-1500 ℃ in a closed furnace, the iron is discharged to the bottom of the melting furnace in the molten state and the zinc is discharged in the gas state; The discharged reducing gas solidifies the gaseous zinc in the liquid phase under the condition of lead spraying liquid and temperature and pressure in a rapid cooling device, and separates the solidified zinc liquid and lead solution into lead and zinc through a separation device to produce zinc. It may include a step.

And performing a refining process to increase the purity of zinc in the separated metal state.

In the preparing of the zinc, a lead solution of about 500 ° C. is injected into the discharged zinc reducing gas of the metal state to drastically reduce the temperature inside the apparatus so that the gaseous zinc vapor is collected in the lead solution to form a gas phase. Converting zinc into liquid zinc; And separating the lead solution in which the zinc vapor provided is separated into zinc and lead solution.

In addition, according to another aspect of the electric furnace EAFD treatment method according to the present invention, the step of mixing the EAFD and water to clean the EAFD to remove the chloride material which is a valuable metal recovery interference component contained in the EAFD; Granulating the EAFD from which the chlorinated material is removed through the washing process, coke, and limestone to a predetermined size; Drying the granulated raw material using waste gas in a closed melting furnace; The dried raw material is reduced by using coke to reduce the EAFD at a temperature of 1000-1500 ℃ in a closed furnace, the iron is discharged to the bottom of the melting furnace in the molten state and the zinc is discharged in the gas state; A lead solution of about 500 ° C. is injected into the discharged zinc reducing gas of the metal state to drastically lower the temperature inside the apparatus so that the gaseous zinc vapor is collected in the lead solution to convert gaseous zinc into liquid zinc. step; Separating the lead solution in which the provided zinc vapor is collected into zinc and lead solution; And performing a refining process to increase the purity of zinc in the separated metal state.

First, steelmaking works in general furnaces are mainly broken into scrap metal, which is the main raw material, into an electric furnace, and put into the furnace. Coke and other subsidiary materials are added to dissolve with hot arc heat (1500-1650 ℃) to make the molten iron. The molten iron is then adjusted to produce semi-finished products.

Electric furnace steelmaking dust (EAFD) is a waste product which is incidentally discharged when melting iron and producing iron. Hazardous heavy metals and other constituents contained in the iron are transported together with dust from the electric furnace. These hazardous components are included and classified as designated wastes in the waste classification.

In the EAFD, 40 to 45% of Fe, 20 to 25% of Zn, and other heavy metals such as Pb, Cd, and Cr, Na, Si, and Cl are contained. It is shown in Table 1 below.

Chemical composition (wt%) main ingredient Al203 Si02 Fe203 CaO MnO MgO Na2O ZnO Cl 0.75 4.31 41.51 4.05 2.51 1.83 8.68 24.27 4.30 Other Ingredients K2O = 2.48, PbO = 2.36, SO3 = 1.08, F = 0.34, CdO = 0.14

Hereinafter, with reference to the accompanying drawings, the electric steelmaking dust treatment apparatus and method thereof according to the present invention will be described in detail.

1 is a block diagram showing a steelmaking dust treatment apparatus according to the present invention, the solid / liquid separator 10, granulator 20, dryer 30, melting furnace 40, condenser 50, separator 60, the refiner 70, the combustion tower 80, the heat exchanger 90, the dust collector 100 and the stack 110 may be configured.

The solid / liquid separator 10 is agitated by mixing the EAFD and water to remove the Cl component contained in the EAFD, and the liquid (water) containing the Cl component in the stirred mixture is transferred to a wastewater treatment apparatus (not shown). The separated EAFD (Cl removed steelmaking dust) is supplied to the granulator 20 through the conveyor 11, such as coke and lime, for the next process. That is, since the solid / liquid separator 10 is injected with the EAFD is mixed with water, Cl component contained in the EAFD is dissolved in water and discharged to the wastewater treatment apparatus, so that the Cl component contained in the EAFD is removed. In addition, in the solid / liquid separator 10, not only the Cl component but also pre-treatment of materials acting as a barrier for recovering valuable metals.

The granulator 20 mixes EAFD from which the Cl component is removed, coke, limestone, etc. to be used as a reducing agent and a heat source, and granulates the granules to a size of a predetermined size and is introduced into the dryer 30 through the discharge hopper.

The dryer 30 is dried by using the waste gas of the closed melting furnace to dry the material introduced through the input hopper to have a constant moisture retention and strength.

The melting furnace 40 is the raw material dried through the dryer 30 is heated to a temperature of about 1000-1500 ℃ to produce coke as CO under reducing conditions, the iron oxide and zinc oxide to the metal state by the generated CO gas To be reduced. Since the reduced iron is only dissolved in the liquid state at 1000-1500 ° C, it is discharged to the iron reservoir (not shown) through the discharge hopper 41 at the bottom of the closed furnace, and the reduced gas of metal zinc is maintained at about 1000 ° C condenser. It is conveyed through the discharge hopper 42 to (quick cooling device) (50).

The condenser 50 injects a lead solution of about 400 ° C. to the zinc reducing gas in the metal state provided from the melting furnace 40, and scatters like a mist, thereby rapidly decreasing the temperature inside the apparatus. When the internal temperature drops sharply, gaseous zinc vapor is collected in the lead solution, and the gaseous zinc is converted into a liquid phase and discharged to the separator 60.

The separator 60 separates the lead solution in which zinc vapor provided from the condenser 50 is collected into zinc and lead solution. In other words, the lead solution and the zinc solution are separated by the difference in specific gravity. The high specific gravity lead solution is submerged, and the low specific gravity zinc solution is separated on the lead solution. The zinc solution thus separated is 96-98% pure.

The zinc solution separated in this way is to be refined through the refining process 70 to increase its purity to increase the purity to about 99.9955% to be manufactured as zinc for plating.

The gaseous substances passing through the condenser 50 completely burns incompletely burned CO gas in the combustion tower 80 to remove air pollutants, and removes the remaining air pollutants through the heat exchanger 90 and the bag filter 100. After removal is to be discharged to the outside through the stack (110).

The operation of the steelmaking dust treatment apparatus according to the present invention configured as described above will be described in more detail.

First, in order to recover valuable metals from the EAFD, the substances acting as obstructions must be removed by pretreatment in advance. For example, Na may be combined with a reducing agent and iron in a closed furnace to condense inside the furnace, preventing the zinc in the EAFD from evaporating, thus reducing the recovery of metal zinc.

In addition, Cl is believed to lead to corrosion of internal refractory, outer wall and other equipment by converting it into gaseous phase in high temperature furnace, which shortens the lifetime of the furnace and equipment and so production cost by stopping production operation and repairing equipment. This will have a significant impact on the company.

In order to remove the interference material, the mixed EAFD and water are mixed and stirred, and the stirred mixture is passed through the solid / liquid separator 10 to transfer water to the wastewater treatment device, and the separated EAFD is passed through the belt conveyor 11. Transfer to granulator 20.

EAFD from which the interference substance is removed is mixed with coke, limestone, etc. to be used as a reducing agent and a heat source, and granulated in the granulator 20 to a size of a certain size.

When EAFD, coke, limestone, etc., which are not granulated in the granulator 20 are directly introduced into a closed melting furnace, dust particles are scattered in the melting furnace, preventing the reduction of zinc oxide, and the scattered dust is introduced into the condenser 50. Significant impacts on the recovery of zinc reduce the economics of recovering valuable metals from EAFD.

The raw material granulated in the granulator 20 is provided to the dryer 30 through an input hopper and dried. That is, the raw material introduced through the input hopper is dried by using the waste gas of the closed melting furnace to dry to maintain a constant moisture and strength.

The raw material which passed through the dryer 30 is thrown into the closed melting furnace 40 of 1000-1500 degreeC. The melting furnace 40 is to use a closed melting furnace so that air is not introduced in order to reduce the zinc oxide and iron oxide to a metal state, it is to be adjusted so that the air is not introduced even when the raw material input.

In the raw material introduced into the melting furnace 40, coke is generated as CO under reducing conditions, and iron oxide and zinc oxide are reduced to a metal state by the generated CO gas. Since the reduced iron is only dissolved in the liquid state at 1000-1500 ℃ discharged to the iron reservoir (not shown) through the discharge hopper 41 of the lower part of the closed furnace, the reduced gas of metal zinc maintains about 1000 ℃ A rapid chiller, ie condenser 50, is conveyed through the discharge hopper 42.

The transferred zinc reducing gas in the condenser 50, by distributing the lead solution in the condenser 50, the temperature inside the device is rapidly lowered, the gaseous zinc vapor is trapped in the sprayed lead solution to change the gaseous zinc into a liquid phase. At this time, the temperature in the condenser 50 is dropped to approximately 400 ℃.

The lead solution in which the liquid zinc solution thus changed is collected is provided to the separator 60. Separator 60 is to be separated by the difference between the specific gravity of the lead solution and the zinc solution, the high specific gravity lead solution will sink to the lower side, the zinc solution having a lower specific gravity than the lead solution will float to the lead solution upper side. Therefore, the lead solution and the zinc solution are separated according to the difference in specific gravity.

The purity of the metal zinc thus separated is about 96-98%. Therefore, in order to increase the purity of the metal zinc by transferring the separated metal zinc to the refiner 70 to undergo a refining process, it is to improve the purity. At this time, the purity of the metal zinc through the refining process is approximately 99.9955%.

In other words, zinc used for industrial use is mainly used for plating and is used for galvanizing steel products. The purity of zinc used for zinc plating should be recognized as the highest level of 99.9955% to be recognized as commercial. Therefore, the metal zinc separated through the separator 60 is once again made of high purity zinc through the refining process through the refiner 70.

The gaseous substances passing through the condenser 50 completely burns incompletely burned CO gas in the combustion tower 80 to remove air pollutants, and the remaining air pollutants are removed from the heat exchanger 90 and the bag filter 100. To remove it.

Hereinafter, an electric furnace steelmaking dust treatment method according to the present invention corresponding to the operation of the electric furnace steelmaking dust treatment apparatus according to the present invention will be described step by step with reference to FIG. 2.

2 is a flowchart illustrating an operation of an electric furnace steelmaking dust treatment method according to the present invention.

First, as shown in FIG. 2, a cleaning process is performed to remove chlorides such as Cl and Na, which are organic metal recovery interference components contained in the EAFD. That is, to remove the chloride (Cl, Na) contained in the EAFD through the solid / liquid separator 10 as shown in Figure 1 (S101). That is, the liquid (water) containing the Cl component in the mixed EAFD and water to be mixed is transferred to a wastewater treatment device (not shown).

Subsequently, the EAFD, coke and limestone, in which Cl and chloride are removed through the washing process, are mixed and granulated to a predetermined size (S102).

Thus granulated raw material is dried using the waste gas of the closed melting furnace (S103).

The dried raw material is reduced by using coke to reduce the EAFD at a temperature of 1000-1500 ℃ in a closed furnace, iron is discharged to the bottom of the furnace in a molten state and zinc is transferred to a rapid cooling device in a gas state (S104).

In this way, the reduced gas is solidified in a liquid spray under the conditions of lead spraying liquid and temperature and pressure in a rapid cooling system, and the solidified zinc liquid and lead solution are separated into lead and zinc through a separation device (S105). . Here, the separation principle of lead solution and zinc solution uses the difference in specific gravity. In other words, the high specific gravity lead is settled down, and the low specific gravity zinc solution is floated on the lead solution to separate.

Since the zinc in the separated metal state is about 96-98% pure, the purity is slightly low for industrial use, the metal zinc used for industrial refining is refined through a refining facility (S106).

The other gaseous materials that pass through the rapid cooling system completely burn incompletely burned CO gas in the combustion tower, remove the remaining air pollutants through the scrubber and the dust collector (bag filter), and then discharge them through the stack.

Electric furnace steel dust treatment apparatus and method according to the present invention as described above to produce the zinc and iron in a metal state, harmless to the EAFD, and the EAFD in the first step through the cleaning process through the cleaning process Cl and Na are removed, and EAFD from which Cl and Na are removed is reduced and gasified in a melting furnace with reducing agent such as coke at 1000-1500 ℃. By recovering to zinc in the form of metal rather than), the method of producing zinc in the form of metal in the secondary zinc refining plant after the production of primary crude zinc oxide, which is a problem of the existing dry method, is reduced to one and economically treated with EAFD. It is to be done.

It will also have a significant impact on the disposal of hazardous waste, which generates about 300,000 tonnes per year and the recovery of valuable resources that are discarded. In addition, in dealing with EAFD globally, Korea can also accumulate valuable metal recovery technology and make it the most economical, environmentally harmless, and resource-friendly resource in Korea.

Claims (12)

In the electric furnace EAFD processing apparatus, Cleaning means for removing a chlorine component which is a valuable metal recovery hindering component contained in the EAFD; Granulating means for granulating the EAFD from which the chlorine component is removed, coke and limestone through the washing means, and granulating the coarse and limestone to a predetermined size; Drying means for drying the granulated raw material through the granulating means; Dissolving means for reducing the dried raw material by using coke at a predetermined temperature to separate iron in a molten state and zinc in a gaseous state and to discharge them respectively; A rapid cooling by using a lead spray liquid at a predetermined temperature to the discharged zinc reducing gas to solidify the gaseous zinc into a liquid phase, and to separate the solidified zinc liquid and lead solution, respectively; EAFD processing unit. The method of claim 1, EAFD processing apparatus further comprising a refining means for performing a refining process to increase the purity of the metal zinc state produced by the separating means. The method of claim 1, The chlorine component to be cleaned in the cleaning means is an electric EAFD processing apparatus comprising at least one component of Cl, Na component. The method of claim 1, The cleaning means, The EAFD and water are mixed to dissolve the chlorine component contained in the EAFD, and the dissolved liquid chlorine component is transferred to a wastewater treatment device, and the solid EAFD is discharged to the granulating means through a conveyor such as coke and lime. Furnace EAFD Treatment Device which is a solid / liquid separator. The method of claim 1, The drying means, An electric furnace EAFD treatment device that dries using waste gas from a closed furnace. The method of claim 1, The dissolution means, The raw material dried by the drying means is heated to a temperature of about 1000-1500 ℃ to produce coke in the CO under reducing conditions, the electric EAFD treatment to reduce the iron oxide and zinc oxide to the metal state by the generated CO gas Device. The method of claim 1, The separating means, A lead solution of about 400 ° C. is injected into the zinc reducing gas in the metal state provided by the dissolving means to drastically reduce the temperature inside the apparatus, so that the gaseous zinc vapor is collected in the lead solution to convert the zinc gaseous into liquid zinc. A condenser to convert it into; An electric furnace EAFD processing apparatus comprising a separator for separating the lead solution trapped by the zinc vapor provided from the condensation means with zinc and lead solution. In the electric furnace EAFD processing apparatus, Cleaning means for removing a chlorine component which is a valuable metal recovery hindering component contained in the EAFD; Granulating means for granulating the EAFD from which the chlorine component is removed, coke and limestone through the washing means, and granulating the coarse and limestone to a predetermined size; Drying means for drying the granulated raw material through the granulating means; Dissolving means for reducing the dried raw material by using coke at a predetermined temperature to separate iron in a molten state and zinc in a gaseous state and to discharge them respectively; A lead solution of about 400 ° C. is injected into the zinc reducing gas in the metal state provided by the dissolving means to drastically reduce the temperature inside the apparatus, so that the gaseous zinc vapor is collected in the lead solution to convert the zinc gaseous into liquid zinc. Cooling means for converting to; Separating means for separating the lead solution trapped with zinc vapor provided from the cooling means into zinc and lead solution; EAFD processing apparatus comprising a refining means for performing a refining process to increase the purity of the metal zinc state produced by the separating means. In the electric furnace EAFD treatment method, Mixing the EAFD and water to clean the EAFD to remove chloride, which is an interfering organic metal recovery component contained in the EAFD; Granulating the EAFD from which the chlorinated material is removed through the washing process, coke, and limestone to a predetermined size; Drying the granulated raw material using waste gas in a closed melting furnace; The dried raw material is reduced by using coke to reduce the EAFD at a temperature of 1000-1500 ℃ in a closed furnace, the iron is discharged to the bottom of the melting furnace in the molten state and the zinc is discharged in the gas state; The discharged reducing gas solidifies the gaseous zinc in the liquid phase under the condition of lead spraying liquid and temperature and pressure in a rapid cooling device, and separates the solidified zinc liquid and lead solution into lead and zinc through a separation device to produce zinc. Furnace EAFD treatment method comprising the step. The method of claim 9, EAFD treatment method comprising the step of performing a refining process to increase the purity of the zinc in the separated metal state. The method of claim 9, The step of preparing zinc, A lead solution of about 500 ° C. is injected into the discharged zinc reducing gas of the metal state to drastically lower the temperature inside the apparatus so that the gaseous zinc vapor is collected in the lead solution to convert gaseous zinc into liquid zinc. step; The EAFD treatment method of the electric furnace comprising the step of separating the lead solution in which the zinc vapor collected is provided with zinc and lead solution. In the electric furnace EAFD treatment method, Mixing the EAFD and water to clean the EAFD to remove chloride, which is an interfering organic metal recovery component contained in the EAFD; Granulating the EAFD from which the chlorinated material is removed through the washing process, coke, and limestone to a predetermined size; Drying the granulated raw material using waste gas in a closed melting furnace; The dried raw material is reduced by using coke to reduce the EAFD at a temperature of 1000-1500 ℃ in a closed furnace, the iron is discharged to the bottom of the melting furnace in the molten state and the zinc is discharged in the gas state; A lead solution of about 500 ° C. is injected into the discharged zinc reducing gas of the metal state to drastically lower the temperature inside the apparatus so that the gaseous zinc vapor is collected in the lead solution to convert gaseous zinc into liquid zinc. step; Separating the lead solution in which the provided zinc vapor is collected into zinc and lead solution; EAFD treatment method comprising the step of performing a refining process to increase the purity of the zinc in the separated metal state.