KR101126549B1 - Apparatus and method for recovering valuable metals from dust of steel - Google Patents

Abstract

The present invention relates to a valuable metal recovery apparatus and a method for recovering valuable metals using the same, and more particularly, to recover valuable metals from steelmaking dust generated during the melting process in an electric furnace and to remove harmful gases. At the same time, the present invention relates to a valuable metal recovery apparatus capable of recovering valuable metals and a method for recovering valuable metals using the same.
To this end, the present invention is provided with a collecting part for collecting dust generated in the melting furnace, a separating part connected to the collecting part to separate according to the particulate and vapor phase, and a cooling means connected to the separating part And a collecting part for recovering the valuable metal, a dust collecting part connected to the recovering part to remove harmful components and removing harmful components, a discharge part connected to the dust collecting part for discharging clean gas, and particles separated from the separating part. And it is characterized in that it comprises a storage unit for storing the harmful components removed from the dust collector.

Description

Apparatus for recovering valuable metals from steelmaking dust and methods for recovering valuable metals using the same {APPARATUS AND METHOD FOR RECOVERING VALUABLE METALS FROM DUST OF STEEL}

The present invention relates to a valuable metal recovery apparatus and a method for recovering valuable metals using the same, and more particularly, to recover valuable metals from steelmaking dust generated during the melting process in an electric furnace and to remove harmful gases. At the same time, the present invention relates to a valuable metal recovery apparatus capable of recovering valuable metals and a method for recovering valuable metals using the same.

In general, the steelmaking process of the electric furnace is a process in which the collected scrap iron is put into an electric furnace and melted and regenerated. The steelmaking dust generated therein includes various metallic inorganic materials such as iron oxide, zinc oxide, silicon oxide, and lead. It is classified as designated waste in the relevant legislation.

Accordingly, when the steelmaking dust is released into the atmosphere, serious air pollution is caused, and thus, the dust is collected through a dust collector and then reprocessed or disposed of.

On the other hand, in the case of zinc, which imports an enormous amount every year among the metals contained in the steelmaking dust, for example, in 1997, the import volume is 56,000 tons, and the cost is $ 47 million. It was reported that the generation amount was 652 tons per day in 1996 and increased by more than 100% to 1093 tons per day in 2005.

Therefore, recovering zinc from the steelmaking dust produces an import substitution effect of about 40,000 tons (about 30 million US dollars) when recycled.

To recover zinc contained in the steelmaking dust, the steelmaking dust is reacted and recovered after precipitation in an aqueous solution containing carbonate, or the steelmaking dust is processed into pellets and then reduced to separate by distillation, or a binder and an aluminum dross. It is developed by various methods such as thermometallurgical method, wet metallurgy method, electrolytic method, surface treatment method, etc., after mixing, into a single tube, melt-reducing and recovering the single tube, or recovering with zinc oxide.

However, these methods are not only uneconomical due to excessive costs of treatment, but also cause other harmful effects such as generating secondary pollutants. In the case of zinc, the amount of zinc in the steelmaking dust is low. In order to efficiently reach the target value, there is a technical problem of repeatedly adding the steelmaking dust, the zinc recovery is not efficient, and there is a problem in that the metals contained in the steelmaking dust are not separately stored.

The present invention collects the steelmaking dust and harmful gas generated in the melting furnace in the collecting unit to separate the particulate phase in the separation unit, recover valuable metals in the recovery unit, and remove the harmful gas in the dust collecting unit is made in the melting furnace By being made simultaneously with the melting process, there is an object to increase the valuable metal recovery efficiency.

Another object of the present invention is to separate and store valuable metals contained in the steelmaking dust according to temperature, and to reduce the cost of the reprocessing process by recovering metal zinc as well as zinc oxide.

Another object of the present invention, the recovery of valuable metals from the steelmaking dust, by blocking the recovery of valuable metals mixed with a large amount of harmful components, it is an object to increase the value of the recovered valuable metals.

Still another object of the present invention is to recover a high-purity metal zinc by adding a charcoal agent during the recovery of valuable metals.

Hereinafter, the present invention will be described.

Regarding the means for solving the problem,

The present invention is a device for recovering valuable metals from steelmaking dust, comprising: a collecting portion for collecting the steelmaking dust generated in the melting furnace; and a first duct connected to the collecting portion and provided with a first burner Separation unit having a first temperature sensor for separating the transported steelmaking dust into particulate and vapor phase according to the specific gravity, and the vapor phase is transferred through the second duct connected to the separation unit and the second burner is provided therein A recovering unit having a second temperature sensor cooled by the means to recover the valuable metals, and a dust collecting unit for removing the harmful components by transferring the harmful gases remaining after the valuable metals are recovered through the third duct connected to the recovering unit; , The discharge part connected to the dust collecting part to discharge the clean gas from which the harmful component has been removed through the fourth duct, and the particulate matter separated from the separating part and the harmfulness removed from the dust collecting part. The storage shall be characterized in that comprises section that stores separated in accordance with the temperature sensed by the first temperature sensor.

Another invention of the present invention, the storage unit is characterized in that it comprises a first reservoir for storing the particulate matter having a temperature less than 1000 ℃ and the harmful components removed from the dust collector, and a second reservoir for storing the particulate form having a temperature of 1000 ℃ or more. .

Another invention of the present invention, the recovery unit is characterized in that the valuable metal recovery is blocked when the second temperature sensor unit senses the temperature of the vapor phase cooled by the cooling means less than 500 ℃.

Another invention of the present invention is characterized in that the valuable metal is zinc oxide, the temperature of the vapor phase cooled by the cooling means is recovered in the range of 500 to 1000 ℃.

Another invention of the present invention, the valuable metal is characterized in that the second duct is further provided with a charcoal injection unit is recovered as a metal zinc in the recovery unit.

Another invention of the present invention, the metal zinc is characterized in that the temperature of the vapor phase cooled by the cooling means in the recovery unit is recovered to a high-purity metal zinc maintaining the 700 to 900 ℃ or more.

In still another aspect of the present invention, there is provided a method for recovering valuable metals using an apparatus for recovering valuable metals from steelmaking dust, the method comprising: collecting steelmaking dust generated in a melting furnace at a collecting unit; The steel dust is heated and transported to maintain a temperature of 1000 ° C. or more through the first duct provided with the separator. The steel dust is separated into the particulate and vapor phases according to specific gravity in the separation unit. The second duct is provided with the second duct. The vaporized phase heated to more than ℃ ℃ to the recovery unit is cooled to less than 500 to 1000 ℃ by the cooling means to recover the zinc oxide, and the harmful gas remaining after the zinc oxide is recovered from the vapor phase through the dust collecting unit The harmful components are removed and the clean gas from which the harmful components have been removed is discharged to the discharge portion through the fourth duct and the particulates separated from the separating portion are removed. And a second store, separated in accordance with the temperature detected by the temperature sensor 1 comprises a group separation section, the method comprising: storing the harmful components removed from the dust collecting section; characterized in that comprises a.

Another invention of the present invention, the step of recovering the zinc oxide is the recovery of the zinc oxide when the temperature of the vapor phase cooled by the cooling means is less than 500 ℃ detected by the second temperature sensor provided in the recovery unit It is characterized by blocking the.

In still another aspect of the present invention, there is provided a method for recovering valuable metals using an apparatus for recovering valuable metals from steelmaking dust, the method comprising: collecting steelmaking dust generated in a melting furnace at a collecting unit; The steel dust is heated and maintained to maintain a temperature of 1000 ℃ or more through the first duct equipped with the separation in the particulate and vapor phase according to the specific gravity in the separation unit, and the second burner and charcoal injection After the addition of the second duct is mixed with the reducing agent and the vapor phase heated to 1000 ℃ or more is transferred to the recovery unit and cooled to 500 to less than 1000 ℃ by the cooling means to recover the metal zinc, and metal zinc in the vapor phase After the recovery, the residual harmful gas is transferred to the dust collector through the third duct to remove harmful components, and the clean gas from which the harmful components are removed is passed through the fourth duct. And storing the harmful component removed from the dust collector by separating the particulates separated by the discharge unit and the particulates separated by the separator according to the temperature sensed by the first temperature sensor provided in the separator. It is characterized in that the configuration.

Another invention of the present invention, the step of storing the particulate separated from the separator and the harmful component removed from the dust collector, the temperature detected by the first temperature sensor is less than 1000 ℃ particulate and harmful components removed from the dust collector And a second step of storing a particulate form having a temperature sensed by the first temperature sensor of 1000 ° C. or more.

Another invention of the present invention, the step of recovering the metal zinc is the temperature of the vapor phase cooled by the cooling means when the second temperature sensor provided in the recovery unit is less than 500 ℃, recovery of the metal zinc It is characterized by blocking the.

Another invention of the present invention, the step of recovering the metal zinc is characterized in that the vapor phase cooled by the cooling means to recover the high purity metal zinc by maintaining a temperature of 700 to 900 ℃ or more.

First, the present invention collects the steelmaking dust and harmful gas generated in the melting furnace in the collecting unit to separate the particulate phase in the separation unit, recover valuable metals in the recovery unit, and remove the harmful gas from the dust collecting unit in the melting furnace Simultaneous with the melting process, there is an effect of increasing the valuable metal recovery efficiency.

Secondly, the present invention separates and stores valuable metals contained in the steelmaking dust according to temperature, and also reduces the cost of the reprocessing process by recovering metal zinc as well as zinc oxide.

Third, the present invention has the effect of increasing the value of the valuable metal recovered by blocking the recovery of valuable metal mixed with a large amount of harmful components when recovering the valuable metal from the steelmaking dust.

Fourth, the present invention also has the effect of recovering high-purity metal zinc by adding a charcoal agent during the recovery of valuable metals.

1 is a view schematically showing an apparatus for recovering valuable metals from steelmaking dust according to the present invention.
Figure 2 is a step showing a method for recovering zinc oxide using an apparatus for recovering valuable metals from steelmaking dust according to the present invention.
Figure 3 is a step showing a method for recovering metal zinc using a device for recovering valuable metals in steelmaking dust according to the present invention.

Hereinafter, an apparatus for recovering valuable metals from steelmaking dust according to the present invention and a method for recovering valuable metals using the same will be described with reference to the accompanying drawings.

1 is a view schematically showing an apparatus for recovering valuable metals from steelmaking dust according to the present invention, and FIG. 2 shows recovering zinc oxide using an apparatus for recovering valuable metals from steelmaking dust according to the present invention. 3 is a step diagram illustrating a method, and FIG. 3 is a step diagram illustrating a method of recovering metal zinc using an apparatus for recovering valuable metals from steelmaking dust according to the present invention.

Referring to FIG. 1, the apparatus 10 for recovering valuable metals from steelmaking dust according to the present invention includes a collecting part 100 for collecting steelmaking dust generated in a melting furnace, and an agent connected to the collecting part 100. Cooling means for separating the vapor phase conveyed through the separation unit 200 for separating the steelmaking dust conveyed through the first duct 110 into particulate and vapor phase, and the second duct 220 connected to the separation unit 200 ( A recovery unit 300 for cooling valuable metals to recover valuable metals, a dust collecting unit 400 for removing harmful components of the harmful gas transferred through the third duct 340 connected to the recovery unit 300, and the dust collecting unit The discharge unit 500 is connected to the 400 discharges the clean gas from which the harmful components have been removed, and the storage unit 600 stores the particulate matter separated from the separation unit 200 and the harmful components removed from the dust collector 400. It is configured to include).

The melting furnace is used for melting a metal at high temperature, and includes a kiln, cupola, reflection furnace, and electric furnace. In the present invention, valuable metals are recovered from steelmaking dust generated using an electric furnace, but not limited thereto, and various furnaces used as the melting furnace may be used.

The collecting unit 100 collects steelmaking dust generated in the electric furnace 20, and is provided with a suction fan (not shown) to forcibly collect steelmaking dust generated in the electric furnace 20, or naturally To be captured.

The collecting unit 100 transfers the steelmaking dust collected from one side to the separation unit 200 through the first duct 110 connected to the other side.

The first duct 110, one end is connected to the collecting unit 100, the other end is connected to the separation unit 200, the agent for heating the steelmaking dust collected and transported to the collecting unit 100 It comprises a 1 burner (111).

The first burner 111 heats the steelmaking dust conveyed through the first duct 110 so that the steelmaking dust collected by the collecting unit 100 is cooled while being transferred to the separating unit 200. Steelmaking dust is prevented from adhering to the inner walls of the collecting unit 100 and the first duct 110.

The valuable metal recovered in the apparatus 10 for recovering the valuable metal from the steelmaking dust according to the present invention is zinc, and the melting point of the metal belonging to Group 12 in the periodic table is 419.53 ° C., and the boiling point is 907 ° C.

In addition, the present invention is to recover the zinc of various valuable metals in one embodiment, but is not limited thereto.

Preferably, the first burner 111 is heated to maintain the steelmaking dust 1000 ℃ or more, the zinc vapor contained in the steelmaking dust is changed from the gaseous phase to the solid phase, the collecting part 100 and the first duct 110 To prevent it from sticking to the inner wall of the

On the other hand, since the first burner 110 requires a cost according to an operating time, the first burner 110 does not operate at all times, and is connected to the first temperature sensor 210 so that the temperature of steelmaking dust is due to the rest period of the electric furnace 20. Is rapidly cooled to 500 ° C. or lower so that the zinc vapor turns into a solid phase before being introduced into the collecting part 100, thereby preventing a large amount of impurities from being reduced.

The separation unit 200 is connected to the other end of the first duct 110 is collected from the collecting unit 100 and the steelmaking dust is conveyed through the first duct 110 and the particulate and vapor according to the specific gravity Separate steelmaking dust into phase.

Particle particles separated from the separation unit 200 falls to the lower portion of the separation unit 200, so that the first temperature sensor 210 provided in the separation unit 200 to sense the temperature of the falling particle phase. do.

The separation unit 200 is provided with a storage unit 600 at the lower part is discharged and stored in the separation of the vapor phase in the separation unit 200 inside, the storage unit 600, the The first temperature sensor 210 senses the temperature of the particulate phase and classifies and stores the particulate phase below 1000 ℃ and the particulate phase above 1000 ℃ according to the temperature.

The temperature for classifying the particulate phase in the storage unit 600 may vary the classification reference temperature by setting the first temperature sensor 210 according to a user's request, but in the present invention, the first temperature sensor 210 may vary. ) Is set to 1000 ° C so that the zinc having a boiling point of 907 ° C is present in the vapor phase, as described above, the zinc vapor turns into a solid phase and adheres to the inner wall surfaces of the collecting part 100 and the first duct 110. Prevent it.

The separation unit 200, the first drawing member 230, which the temperature detected by the first temperature sensor 210 is less than 1000 ℃ is drawn out of the first drawing member 230, and the temperature is drawn out of the particulate phase is more than 1000 ℃ Two drawing member 240 is provided.

The first drawing member 230 is provided with a first blocking member 231 interlocked with the first temperature sensor 210 to open and close the first drawing member 230.

Like the first blocking member 231, the second drawing member 240 is interlocked with the first temperature sensor 210 to open and close the second drawing member 240. Is provided.

The temperature at which the first blocking member 231 and the second blocking member 241 are driven will be described again with reference to the storage unit 600.

On the other hand, the vapor phase separated from the separation unit 200, one end is connected to the separation unit 200, the other end through the second duct 220 is connected to the recovery unit 300 through the recovery unit 300 Is transferred to).

The second duct 220 has a second burner 221 for heating the vapor phase therein and a third temperature sensor 223 for sensing the temperature of the vapor phase.

The third temperature sensor 223 senses the temperature of the vapor phase and when the temperature of the vapor phase is 1000 ° C. or lower, the second burner 221 is operated to heat the vapor phase to maintain the temperature of 1000 ° C. or higher.

The second duct 220 is further provided with a charcoal injection unit 222 for charging a charcoal to promote the reduction of the vapor phase therein.

The charcoal injection unit 222 is a carbon monoxide (CO) is generated when the gas is added to the inside of the second duct 220 as a reducing agent, and heated by the second burner 221, thereby Since the recovery atmosphere is formed inside the recovery part 300, when the zinc vapor is cooled in the recovery part 300, the recovery part 300 can be recovered in a metal zinc state instead of zinc oxide.

The carbonaceous agent is mainly added to adjust the carbon content in the steel component during steel melting, and there are three types of coal-based, oil-based, and graphite-based materials, which are well known techniques, and thus, detailed descriptions thereof will be omitted.

The recovery unit 300 recovers zinc by cooling the vapor phase transferred through the second duct 220 by the cooling unit 310.

The vapor phase cooled by the cooling means 310, the temperature is lowered, the substances that existed in the vapor phase is crystallized into a solid phase, the present invention, zinc vapor present in the vapor phase is cooled to zinc oxide or metal Phase change to zinc is dropped to the lower portion of the recovery unit 300 is recovered.

The cooling means 310 is to cool the vapor phase having a temperature of 1000 ℃ or more, the method is a variety of methods, such as oil circulation cooling, cooling with cooling water, air-cooled cooling, in the present invention, air-cooled cooling method is used It is desirable to.

The external air is circulated in the tubular shape which penetrates the inside of the recovery unit 300 and is bent in a zigzag to be penetrated through the outside to cool the vapor phase.

The cooling means 310 is a well-known technique and a detailed description thereof will be omitted.

The recovery unit 300 is provided with a second temperature sensor 320 therein to sense the temperature of the substance which has changed into a solid phase by cooling the vapor phase or the vapor phase.

The second temperature sensor 320 may be provided between the other end of the second duct 220 and the cooling means 310 in the recovery part 300, but in the present invention, the vapor phase is Since the temperature of the valuable metal, ie, zinc oxide or metal zinc, cooled by the cooling means 310 and phase-changed into a solid phase, should be sensed, it is preferable to be provided below in the recovery part 300.

In the lower portion of the recovery unit 300, a third drawing member 330 is provided to draw out the valuable metal that the vapor phase is cooled and turns into a solid phase and falls, the third temperature sensor 320 is linked to the third A third blocking member 331 for opening and closing the drawing member 330 is provided.

When the temperature of the vapor phase cooled by the cooling means 310 sensed by the second temperature sensor 320 is 500 ° C. or less, the third blocking member 331 opens the third drawing member 330. To prevent valuable metals from being recovered.

On the other hand, the vapor phase is cooled and the material, including the valuable metal that is phase-changed into the solid phase falls to the lower portion of the recovery unit 300 and the remaining vapor phase is connected to the recovery unit 300, the other end is the dust collector ( It is transferred to the dust collecting part 400 through a third duct 340 connected to 400.

The vapor phase transferred through the third duct 340 is filtered after the harmful component is collected in the dust collecting part 400, one end is connected to the dust collecting part 400, the other end is connected to the discharge part 500 It is transferred to the discharge part 500 through the duct 410.

The discharge part 500 is provided with a discharge fan 510 for forcibly suctioning the clean gas filtered out of the harmful component in the dust collector 400, the clean gas sucked by the discharge fan 510 is the discharge part 500 It is emitted to the outside through the other end of).

The discharge fan 510 is provided with a plurality of blades, and is rotated by the drive motor is already well known technology, so a detailed description thereof will be omitted.

The storage unit 600 classifies and stores the particles separated in the separation unit 200 according to a temperature, stores the harmful components filtered by the dust collecting unit 400, and stores the first storage 610 and the second storage. And 620.

The first reservoir 610 is connected to the first withdrawal member 230 and separated from the vapor phase in the separation unit 200, the particle phase of the temperature falls below 1000 ℃ and the dust collecting unit 400 The filtered harmful ingredient is stored.

The second reservoir 620 is connected to the second withdrawal member 240 to store particulates having a temperature of 1000 ° C. or more among the particulates falling from the vapor phase in the separator 200 and falling.

Hereinafter, an embodiment of a method for recovering a valuable metal using the apparatus 10 for recovering valuable metals from steelmaking dust according to the present invention will be described with reference to FIG. 2.

In order to recover the valuable metal, the present invention, in the method for recovering the valuable metal using the apparatus 10 for recovering the valuable metal from the steelmaking dust, the steelmaking dust generated in the melting furnace (collection) 100 and the steelmaking dust heated and transported to maintain a temperature of 1000 ° C. or higher through the first duct 110 provided with the first burner 111 is separated from the granules 200 according to specific gravity. The vapor phase separated into the vapor phase and heated to 1000 ° C or more through the second duct 220 provided with the second burner 221 and transferred to the recovery unit 300 are 500 to 500 by the cooling means 310. Cooling zinc oxide below 1000 ° C. to recover zinc oxide; and removing the harmful gas remaining after the zinc oxide is recovered in the vapor phase to the dust collecting part 400 through the third duct 340 to remove harmful components. Clean gas from which noxious components have been removed passes through the fourth duct 410. By discharging to the discharge part 500 and separating the particulates separated by the separator 200 according to the temperature sensed by the first temperature sensor 210 provided in the separator 200. Characterized in that it comprises a step of storing the harmful components removed from the dust collector 400.

The steelmaking dust has a particle size of 4 to 6 ㎛ is mixed with the particulate and vapor phase, it is supported by the melting furnace, that is, the upper portion of the electric furnace 20 is introduced into one end of the collecting part 100 is the recovery part ( 300).

The electric furnace 20 is in a high temperature state of about 1500 ℃ or more in order to melt the iron, the boiling point of 907 ℃ of zinc in the electric furnace 20 most of the phase change into the vapor is drawn into the collecting part 100 do.

The steelmaking dust collected in the step of collecting the steelmaking dust is transported by the first burner 111 to be separated into particulate and vapor phases so as to maintain a constant temperature in the first duct 110.

The steelmaking dust conveyed in the step of separating into the particulate and vapor phase is separated into a particulate and vapor phase according to the specific gravity, the particulate falls to the lower portion of the separation unit 200, the vapor phase is the second duct 220 Is pulled in.

In the present invention, the main material constituting the particulate form is composed of iron oxide, silicon oxide, aluminum oxide and calcium oxide, the first temperature sensor 210 provided in the separation unit 200 is the separation unit Detects the temperature of the particle phase falling within 200.

When the particulate temperature is less than 500 ° C., the first burner 111 linked to the first temperature sensor 210 operates to heat the steelmaking dust collected in the step of collecting the steelmaking dust to 1000 ° C. or more. Thus, the steel dust is prevented from being fixed to the inner walls of the collecting unit 100 and the first duct 110 in the process of being collected.

The method of storing the particulate form in the step of separating the particulate and vapor phase will be described later.

In the zinc oxide recovery step, the vapor phase separated from the particulate phase is introduced into the second duct 220 and heated to maintain a constant temperature, and then transferred to the recovery unit 300 to recover valuable metals.

In the present invention, the main material constituting the vapor phase is composed of valuable metals such as zinc, chlorine, sulfurous acid and other particulate particulate matter.

In the vapor phase introduced into the second duct 220, the third temperature sensor 223 senses the temperature of the vapor phase and maintains at least 1000 ° C. so that the vapor phase is fixed to the inner wall of the second duct 220, The second burner 221 is operated to heat the vapor phase in order to prevent phase change of the vapor zinc collected by the collecting part into a solid phase.

The vapor phase heated so that the temperature is maintained at 1000 ° C. or higher is transferred to the recovery part 300, and is cooled by the cooling means 310 provided in the recovery part 300, thereby being present in the vapor phase. When the temperature is below the boiling point, the phase change into a solid phase and valuable metals are recovered by falling in the recovery unit 300.

When the vapor phase is cooled by the cooling means 310 to reach a temperature lower than the boiling point of zinc, the vapor zinc contained in the vapor phase becomes solid, and in this process, the zinc zinc is reacted with the surrounding oxygen to recover the zinc oxide. Will fall to the bottom.

In the step of recovering zinc oxide, the temperature at which the vapor phase is cooled by the cooling means 310 is not limited, but in the present invention, the allowable cooling temperature range is 500 to 900 ° C. to recover zinc oxide from the vapor phase, The appropriate cooling temperature is 650 to 850 ° C. with a low content of impurities at 907 ° C. or lower, which is the boiling point of zinc.

In the step of recovering the zinc oxide, the zinc oxide, which cools down the vaporized zinc and falls downward in the recovery part 300, is disposed in the recovery part 300. The temperature is sensed by 320.

When the temperature of the zinc oxide sensed by the second temperature sensor 320 is 500 to 1000 ° C., the zinc oxide is transferred to the outside through the third drawing member 330 provided below the recovery part 300. When the temperature of the zinc oxide is less than 500 ° C., the third blocking member 331 provided at the upper portion of the third drawing member 330 is operated at the lower portion of the recovering part 300. Closing the third drawing member 330 blocks the recovery of zinc oxide.

In the step of recovering the zinc oxide, the zinc oxide has a purity of 70 to 80% or more, and when the temperature of the zinc oxide is less than 500 ° C., the vapor phase is cooled to lead the zinc oxide, which has changed to a solid phase, with relatively low boiling point. Since harmful components such as (Pb) and chlorine (Cl) gas may be mixed in a large amount, the temperature detected by the second temperature sensor 320 as described above should be separated by reprocessing zinc oxide separately to increase product value. If is less than 500 ℃ it is preferable to block the recovery of zinc oxide.

Meanwhile, substances including zinc oxide, in which the vapor phase introduced into the recovery unit 300 is cooled to less than 500 ° C. and changed into a solid phase, are separately recovered in the recovery unit 300 to be separately stored in the first reservoir of the storage unit 600. The zinc oxide is extracted through reprocessing, stored in 610, recovered to another route, or used as an ascon filler or brick material.

In the step of removing the harmful components, the vapor phase is cooled in the recovery unit 300 to recover zinc oxide, and subsequently remove the substances and harmful components present in the vapor phase.

The zinc oxide is recovered and the vapor phase and harmful components present in the gaseous phase are introduced into the third duct 340 and transferred to the dust collecting unit 400 to remove the harmful components and substances present in the vapor phase in the vapor phase. .

Clean gas from which harmful substances and substances present in the vapor phase are removed in the vapor phase is forcibly sucked by the discharge fan 510 provided in the discharge part 500 to discharge the discharge part through the fourth duct 410. It is transported to 500 and released into the air.

The storing of the particulate matter and the harmful component may be performed by interlocking with the first temperature sensor 210 when the temperature of the particulate matter separated from the vapor phase in the separation part 200 falls below 1000 ° C. The member 241 closes the second lead-out part 240, the first blocking member 231 is opened, and particulates are drawn out to the first lead-out member 230 and stored in the first storage 610. .

In addition, the harmful components removed in the step of removing the harmful components and other substances present in the vapor phase in the vapor phase are also stored in the first reservoir 610.

Since the particulate matter stored in the first reservoir 610 may contain a large amount of impurities, it is used as an ascon filling material or a brick raw material together with harmful components removed from the dust collecting part 400.

The storing of the particulate matter and the harmful component may be performed by interlocking with the first temperature sensor 210 when the temperature of the particulate matter separated from the vapor phase and falling in the separator 200 is 1000 ° C. or more. The member 231 closes the first drawing member 230, the second blocking member 241 is opened, and the particulate form is drawn out to the second drawing member 240 and stored in the second storage 620. do.

Particles of the main material to be stored in the second storage 620 is a material with high recycling value such as pure iron oxide and silicon oxide.

Hereinafter, another embodiment of the method for recovering the valuable metal using the apparatus 10 for recovering the valuable metal from the steelmaking dust according to the present invention will be described with reference to FIG. 3.

In order to recover the valuable metal, the present invention, in the method for recovering the valuable metal using the apparatus 10 for recovering the valuable metal from the steelmaking dust, the steelmaking dust generated in the melting furnace (collection) 100 and the steelmaking dust heated and transported to maintain a temperature of 1000 ° C. or higher through the first duct 110 provided with the first burner 111 is separated from the granules 200 according to specific gravity. Separating into the vapor phase, the steam mixed with the reducing agent through a second duct 220 provided with a second burner 221 and a charcoal injection unit 222 to heat the vapor phase heated to 1000 ℃ or more The phase is transferred to the recovery unit 300 and then cooled to 500 to less than 1000 ° C. by the cooling means 310 to recover the metal zinc, and the harmful gas remaining after the zinc oxide is recovered from the vapor phase is converted into a third duct ( 340 is transferred to the dust collecting unit 400 to remove harmful components And the clean gas from which the noxious component is removed is discharged to the discharge part 500 through the fourth duct 410, and the particulates separated from the separation part 200 are provided in the separation part 200. And storing according to the temperature detected by the first temperature sensor 210, and storing the harmful components removed from the dust collector 400.

Collecting the steelmaking dust, separating the steelmaking dust into particulates and vapor phases according to specific gravity in the separator 200, removing harmful components, discharging clean gas to the discharge part 500, and particulates. And the step of storing the harmful components includes one embodiment of a method for recovering the valuable metal using the apparatus 10 for recovering the valuable metal from the steelmaking dust according to the present invention, and other methods of recovering the valuable metal According to the embodiment, the second duct 220 further includes the peat filler injection part 222 to recover metal zinc instead of zinc oxide.

Steelmaking dust is collected by the collecting unit 100 and transferred to the separating unit 200, and the steelmaking dust transferred to the separating unit 200 is separated into particulate and vapor phases according to its specific gravity.

As described in the embodiment of the method for recovering the valuable metals, the particulates separated from the vapor phase in the separator 200 are detected by the first temperature sensor 210 to detect the particulate temperature. Particles are taken out to the extraction member 230 or the second extraction member 240 and stored in the first storage 610 or the second storage 620.

The vapor phase from which the particulate phase is separated from the separator is introduced into the second duct 220 and transferred to the recovery unit 300 to recover metal zinc.

The second duct 220 is provided with a third temperature sensor 223 for detecting the temperature of the vapor phase introduced from the separation unit 200, the phase change of the vapor zinc when the temperature of the vapor phase is less than 1000 ℃. In order to prevent the second burner 221 is operated to heat the vapor phase to maintain a temperature of 1000 ℃ or more.

At the same time, in the second duct 220, the charcoal injection unit 222 provided in the inside, the charcoal is charged and mixed with the vapor phase, and heated by the second burner 221 in a state of mixing with the charcoal. The vaporized phase is transferred to the recovery unit 300.

In the step of recovering the metal zinc, a large amount of carbon monoxide is generated in the vapor phase in which the carbonization agent is mixed to form a reducing atmosphere in the recovery part 300, whereby the zinc vapor contained in the vapor phase by the cooling means 310 When the oxygen in the recovery part 300 reacts with the carbon monoxide generated from the carbonization agent, the reaction between the zinc vapor and the oxygen is interrupted, so that the oxygen is not oxidized and falls in the recovery part 300 in the metal zinc state so that the third reaction occurs. The extraction member 330 is drawn out.

In addition, in the step of recovering the metal zinc, by controlling the cooling temperature of the second burner 221 and the cooling means 310 to allow the vapor phase to be cooled to a temperature of 700 to 900 ℃ to recover metal zinc with a purity of 70% or more It is possible to.

As such, by using the apparatus 10 for recovering valuable metals from the steelmaking dust according to the present invention, pure iron oxide, silicon oxide and zinc oxide or metal zinc are recovered from the steelmaking dust used as a conventional ascon filler or brick material. By reducing the cost of importing raw materials, preventing air pollution due to harmful gases in the steelmaking dust, and storing according to the temperature of particulates to increase the recycling efficiency of resources, recovery of valuable metals at a certain temperature By blocking, valuable metals with high purity can be recovered.

The present invention is not limited to the specific preferred embodiments described above, and any person skilled in the art to which the present invention pertains can make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

10: device for recovering valuable metals 20: electric furnace
100: collecting unit 110: the first duct
111: first burner
200: separation unit 210: the first temperature sensor
220: second duct 221: second burner
222: a petroleum filler injection unit 223: third temperature sensor
230: first drawing member 231: first blocking member
240: second drawing member 241: second blocking member
300: recovery unit 310: cooling means
320: second temperature sensor 330: third drawing member
331: third blocking member 340: third duct
400: dust collector 410: fourth duct
500: discharge part 510: discharge fan
600: storage unit 610: first storage
620: Second Repository

Claims (12)

In the apparatus for recovering valuable metals from steelmaking dust,
A collecting part for collecting the steelmaking dust generated in the melting furnace;
A separating unit having a first temperature sensor connected to the collecting unit and separating the steelmaking dust conveyed through the first duct provided with the first burner into particulate and vapor phases according to specific gravity;
A recovery unit having a second temperature sensor connected to the separation unit and having a vapor phase transferred through a second duct having a second burner therein to be cooled by a cooling unit to recover valuable metals;
A dust collecting unit for recovering the valuable metal and transporting the remaining harmful gas through the third duct connected to the collecting unit to remove harmful components;
A discharge part connected to the dust collecting part to discharge clean gas from which the harmful component is removed through a fourth duct; And
Recovering valuable metals from steelmaking dust, comprising: a storage unit for storing the particles separated from the separator and the harmful components removed from the dust collector according to the temperature detected by the first temperature sensor Device. The method of claim 1, wherein the storage unit,
A first reservoir for storing particulate matter having a temperature of less than 1000 ° C. and harmful components removed from the dust collecting part; And
And a second reservoir for storing particulates having a temperature of 1000 ° C. or higher. 2. The method of claim 1, wherein the recovery unit,
The second temperature sensor unit detects the temperature of the vapor phase cooled by the cooling means when less than 500 ℃, the valuable metal recovery device, characterized in that the recovery of valuable metals is cut off. The valuable metal of any one of claims 1 to 3, wherein
Apparatus for recovering valuable metals from steelmaking dust, characterized in that the zinc oxide is recovered in the temperature range of 500 to 1000 ℃ cooled by the cooling means. The valuable metal of any one of claims 1 to 3, wherein
Valuable metal recovery unit is further provided in the second duct is recovered as a metal zinc in the recovery unit. The method of claim 5, wherein the metal zinc,
The recovery unit recovers valuable metals from steelmaking dust, wherein the temperature of the vapor phase cooled by the cooling unit in the recovery unit maintains 700 to 900 ° C. or more. In the method of recovering valuable metals using a device for recovering valuable metals from steelmaking dust,
Collecting the steelmaking dust generated in the melting furnace at the collecting unit;
The steelmaking dust is heated and transported to maintain a temperature of 1000 ℃ or more through a first duct provided with a first burner is separated into particulate and vapor phase according to specific gravity in the separation unit;
A step of recovering zinc oxide by cooling the vapor phase which is heated to 1000 ° C. or higher and transferred to a recovery part through a second duct provided with a second burner to 500 to less than 1000 ° C. by a cooling means;
After the zinc oxide is recovered from the vapor phase, the residual harmful gas is transferred to the dust collecting unit through the third duct to remove harmful components;
Discharging the clean gas from which the noxious component is removed to a discharge part through a fourth duct; And
And storing the particulate matter separated by the separator according to the temperature sensed by the first temperature sensor provided in the separator, and storing the harmful component removed from the dust collector. Method of recovering valuable metals by using a device for recovering valuable metals from steelmaking dust. The method of claim 7, wherein the zinc oxide is recovered,
Recovering valuable metals from steelmaking dust characterized in that the recovery of the zinc oxide is blocked when the temperature of the vapor phase cooled by the cooling means is detected by the second temperature sensor provided in the recovery unit is less than 500 ℃. A method for recovering valuable metals using an apparatus. In the method of recovering valuable metals using a device for recovering valuable metals from steelmaking dust,
Collecting the steelmaking dust generated in the melting furnace at the collecting unit;
The steelmaking dust is heated and transported to maintain a temperature of 1000 ℃ or more through a first duct provided with a first burner is separated into particulate and vapor phase according to specific gravity in the separation unit;
The vapor phase, which is mixed with the reducing agent and heated to 1000 ° C. or more, is transferred to a recovery part through a second duct provided with a second burner for heating the vapor phase and a charcoal injection portion, and then cooled to 500 to less than 1000 ° C. by a cooling means. Metal zinc is recovered;
After the metal zinc is recovered in the vapor phase, the residual harmful gas is transferred to the dust collector through the third duct to remove the harmful components;
Discharging the clean gas from which the noxious component is removed to a discharge part through a fourth duct; And
And storing the particulate matter separated by the separator according to the temperature sensed by the first temperature sensor provided in the separator, and storing the harmful component removed from the dust collector. Method of recovering valuable metals by using a device for recovering valuable metals from steelmaking dust. The method of claim 7 or 9, wherein the storing of the particulate matter separated from the separation unit and the harmful component removed from the dust collecting unit,
A first step of storing particulate matter having a temperature sensed by the first temperature sensor below 1000 ° C. and harmful components removed from the dust collecting part; And
And a second step of storing the particulate matter having a temperature sensed by the first temperature sensor of 1000 ° C. or higher. 2. The method of recovering valuable metals using a device for recovering valuable metals from steelmaking dust comprising: 10. The method of claim 9, wherein the step of recovering the metal zinc,
Recovering valuable metals from steelmaking dust, characterized in that if the second temperature sensor provided inside the recovery unit detects the temperature of the vapor phase cooled by the cooling means below 500 ° C., the recovery of the metal zinc is blocked. A method for recovering valuable metals using an apparatus. The method of claim 10, wherein the metal zinc is recovered,
A method for recovering valuable metals using an apparatus for recovering valuable metals from steelmaking dust, wherein the vaporized phase cooled by the cooling means maintains a temperature of 700 to 900 ° C. or higher.

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