CN103069023A - Method and apparatus for recovering metal from electric furnace dust - Google Patents
Method and apparatus for recovering metal from electric furnace dust Download PDFInfo
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- CN103069023A CN103069023A CN2010800684773A CN201080068477A CN103069023A CN 103069023 A CN103069023 A CN 103069023A CN 2010800684773 A CN2010800684773 A CN 2010800684773A CN 201080068477 A CN201080068477 A CN 201080068477A CN 103069023 A CN103069023 A CN 103069023A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/34—Obtaining zinc oxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Obtained are a method and an apparatus for recovering a metal from electric furnace dust, which are capable of recovering the metal with high efficiency without causing problems such as occlusion of the apparatus. An apparatus (1) for recovering a metal from electric furnace dust of the present invention, which recovers molten iron and zinc oxide by melting and reducing electric furnace dust, which contains not less than 12% by mass of a chlorine content and a zinc content in total, mainly by electrical energy. The apparatus (1) for recovering a metal from electric furnace dust comprises: a melting/reduction furnace (3); a secondary combustion chamber (5) in which the exhaust gas from the melting/reduction furnace (3) is caused to form an upward flow at an ascending rate of 0.5-2.0 m/s (inclusive); a coarse-grained dust recovery device (7) for recovering coarse-grained dust that settles in the lower part of the secondary combustion chamber (5); and a fine dust recovery device (9) which is disposed on the exhaust gas exit side of the secondary combustion chamber (5) for the purpose of recovering fine dust.
Description
Technical field
The present invention relates to a kind of method and apparatus that reclaims metal from electric furnace dust, it is from take waste material, reduced iron, the pig iron etc. as raw material and the dust (hereinafter referred to as " electric furnace dust ") that the electric furnace (for example, steel-making arc stove) makes steel produces is smelted in their fusings carried out the metal ingredient recovery.
Background technology
Make the electric furnace dust that produces in the electric furnace of steel take the iron waste material as main raw material and on the basis of containing 20～30% ferric oxide, 10～30% zinc oxide, also contain 2～7% chlorine.
In order to reclaim the zinc composition from this electric furnace dust, adopt widely rotary kiln.In the technique of having used this rotary kiln, electric furnace dust and reductive agent are heated in stove, the metallic zinc steam is generated, make zinc fume oxidation in exhaust, with the form recovery zinc of zinc oxide fine particles.
But the reduction of ferrous components is insufficient in the method, the residual zinc that has about 1～3% in by the ferric oxide of partial reduction.For ferrous components being reduced fully and carrying out the separation of zinc composition with high-level efficiency, the Heating temperature of raw material need to be increased to more than the melt temperature of ferric oxide, but during the rising Heating temperature, exist to be difficult to problem that the semi-melting thing is discharged from reduction apparatus.
In addition, also proposed to make the complete melting of electric furnace dust, the form of ferrous components with iron liquid reclaimed, with the technique of zinc composition with the form recovery of the zinc oxide fine particles in the exhaust.Disclosed in No. 3317137 communique of Japanese Patent " reclaiming the device of zinc oxide from the ironmaking dust " is one of them example (with reference to patent documentation 1).
In this technique, the part of the raw material dust that is supplied to is not melted reduction, and disperses from stove with the form of exhaust with zinc oxide fine particles.
Disclosed in this patent documentation 1 " reclaiming the device of zinc oxide from the ironmaking dust ", for the electric furnace dust before the fractional melting and turn back to raw material, No. the 1st particle collector (40) is set.In addition, No. the 2nd particle collector (41) is set in the downstream of the 1st particle collector, in order to reclaim the zinc oxide as particulate.
Patent documentation 1: No. 3317137 communique of Japanese Patent
Summary of the invention
The particle collector of the exhaust gas treatment device of explanation for example is illustrated as the dry type swirler in the above-mentioned patent documentation 1.
But, in physical device, because therefore the high concentration cl composition in the exhaust is difficult to carry out the operate continuously of this particle collector.It the reasons are as follows described.
The chlorine component of 2～7% in the electric furnace dust exists with the form of the metal chlorides such as ZnCl2, NaCl, KCl.In the electric furnace dust melting and under the temperature of reducing iron oxides, zinc oxide, these metal chlorides become steam and discharge from melting furnace with exhaust.With metal chloride under atmospheric pressure melting temperature and boiling temperature shown in the table 1.
Table 1
| ? | Molten some temperature (℃) | Boiling temperature (℃) |
| ZnCl 2 | 318 | 732 |
| NaCl | 801 | 1465 |
| KCl | 772 | 1407 |
As seen from the above table, the condensation (liquefaction) of metal chloride occurs at coolant exhaust and in the process of dedusting and solidify, condensation (liquefaction), the metal chloride that solidifies are attached to exhaust gas treatment device and cause the exhaust gas treatment device obstruction.
In addition, because the metal reduction reaction in the reduction furnace causes exhaust to contain carbon monoxide (CO) gas of high density, this carbon monoxide need to utilize secondary air to make its burning and generates carbonic acid gas (CO before discharge to system outside
2).By secondary combustion exhaust temperature is become and surpass 1300 ℃ high temperature, need gas quench system, but in above-mentioned patent documentation 1, for not record of gas quench system is set, can not carry out the operation of physical device.
The present invention makes in order to solve this problem, and its purpose is, obtains can be in the situation of the problems such as generation device obstruction not reclaiming the method and apparatus of metal with what high-level efficiency realized metal recovery from electric furnace dust.
(1) involved in the present inventionly reclaiming the method for metal from electric furnace dust, it is characterized in that, is that electric furnace dust 12% or more mainly carries out melting and reducing with electric energy with the total quality % of chlorine component and zinc composition, recovery iron liquid and zinc oxide,
Make the upstream speed of the melting and reducing heater exhaust in the secondary combustion chamber of fusion reducing furnace become the upwelling of 0.5m/s～2.0m/s, separate and subside reclaims particle dust the raw material of smelting as zinc to coarse dust and the non-settling particle dust of above-mentioned secondary combustion chamber bottom.
(2) involved in the present inventionly reclaiming the device of metal from electric furnace dust, it is characterized in that, is that electric furnace dust 12% or more mainly carries out melting and reducing with electric energy with the total quality % of chlorine component and zinc composition, recovery iron liquid and zinc oxide,
It possesses fusion reducing furnace, make the exhaust upstream speed of this fusion reducing furnace become the upwelling of 0.5m/s～2.0m/s secondary combustion chamber, reclaim the coarse dust retrieving arrangement of the coarse dust that is deposited to above-mentioned secondary combustion chamber bottom and be arranged on the exhaust outlet side of above-mentioned secondary combustion chamber and reclaim the particle dust retrieving arrangement of particle dust.
(3) in addition, involved in the present invention reclaiming the device of metal from electric furnace dust, it is characterized in that, is that electric furnace dust 12% or more mainly carries out melting and reducing with electric energy with the total quality % of chlorine component and zinc composition, recovery iron liquid and zinc oxide,
It possesses fusion reducing furnace, make the exhaust upstream speed of this fusion reducing furnace become 0.5m/s～2.0m/s upwelling secondary combustion chamber and be arranged on the exhaust outlet side of above-mentioned secondary combustion chamber and reclaim the particle dust retrieving arrangement of particle dust,
With above-mentioned secondary combustion chamber with this secondary combustion chamber overlook area more than 50% with the stove of above-mentioned fusion reducing furnace in overlapping mode be configured in above-mentioned fusion reducing furnace top.
(4) in addition, such as above-mentioned (2) or (3) the described device that reclaims metal from electric furnace dust, it is characterized in that, above-mentioned particle dust retrieving arrangement possesses cooling from the multitube gas cooler of the katabatic drainage structure of the exhaust of above-mentioned secondary combustion chamber discharge, and this multitube gas cooler is cooled to temperature out with the exhaust that is imported into to be become below 600 ℃.
Be below 600 ℃ by the temperature out that makes exhaust, solidify thereby can make as main muriatic NaCl and KCl, and make it be set in the pipe internal surface of multitube gas cooler.
In the present invention, in the secondary combustion chamber of fusion reducing furnace, make the melting and reducing heater exhaust become the upwelling that upstream speed is 0.5m/s～2.0m/s, the coarse dust that is deposited to above-mentioned secondary combustion chamber bottom is reclaimed, separates, non-settling particle dust is reclaimed the raw material of smelting as zinc, therefore can in the situation of the problems such as generation device obstruction not, realize high efficiency metal recovery in addition, having the effect of the long-time stabilization of operation that makes melting and reducing equipment.The coarse dust that is deposited to the secondary combustion chamber bottom and is recovered also can recycle in material system.
Description of drawings
Fig. 1 be embodiments of the present invention 1 related reclaim the explanatory view of the device of metal from electric furnace dust.
Fig. 2 is the chart of size-grade distribution ratio and the accumulative total ratio of expression particle dust.
Fig. 3 is the chart of size-grade distribution ratio and the accumulative total ratio of expression coarse dust.
Fig. 4 is the chart of the settling velocity of the particle in the expression gas.
Fig. 5 be embodiments of the present invention 2 related reclaim the explanatory view of the device of metal from electric furnace dust.
Nomenclature
1 apparatus for recovering metal
3 fusion reducing furnaces
5 secondary combustion chambers
7 coarse dust retrieving arrangements
9 particle dust retrieving arrangements
11 hoppers
13 electrode devicies
15 primary air introducing ports
17 iron liquid relief outlets
19 slag relief outlets
21 exhaust outlets
23 connecting passages
25 the 1st secondary combustion air introducing ports
27 exhaust introducing ports
28 relief outlets
29 the 2nd secondary combustion air introducing ports
31 spiral conveyers
33 coarse dust relief outlets
35 multitube gas coolers
37 deep bed filter
41 apparatus for recovering metal
Embodiment
［ embodiment 1 ］
Based on Fig. 1 the embodiments of the present invention 1 related device from electric furnace dust recovery metal is described.
The device 1 from electric furnace dust recovery metal of present embodiment, it is characterized in that, be that total quality % with chlorine component and zinc composition is that electric furnace dust more than 12% mainly carries out melting and reducing with electric energy, that reclaims iron liquid and zinc oxide reclaims the device 1 of metal from electric furnace dust
It possesses: fusion reducing furnace 3, make the exhaust upstream speed of this fusion reducing furnace 3 become the upwelling of 0.5m/s～2.0m/s secondary combustion chamber 5, reclaim the coarse dust retrieving arrangement 7 of the coarse dust that is deposited to above-mentioned secondary combustion chamber 5 bottoms and be arranged on relief outlet 28 sides of above-mentioned secondary combustion chamber 5 and reclaim the particle dust retrieving arrangement 9 of particle dust.
＜fusion reducing furnace＞
Be provided with for the iron liquid relief outlet 17 of discharging iron liquid with for the slag relief outlet 19 of discharging slag in the bottom of fusion reducing furnace 3.
Be provided with exhaust outlet 21 on the top of fusion reducing furnace 3.Exhaust outlet 21 is situated between and is communicated with secondary combustion chamber 5 by connecting passage 23.
Be provided with for the 1st secondary combustion air introducing port 25 that imports secondary combustion air at connecting passage 23.
＜secondary combustion chamber＞
The furnace wall of secondary combustion chamber 5 is made as water-cooled (also can be the part structure of refractory).
Be provided with coarse dust retrieving arrangement 7 in the bottom of secondary combustion chamber 5.
Be directed to particle in the exhaust of secondary combustion chamber 5 and be the mixture of the thicker coarse dust that electric furnace dust directly disperses and the particle dust (zinc oxide and metal chloride) of separating out by gas phase.
For secondary combustion chamber 5, because the flow velocity of the upwelling in the secondary combustion chamber 5 is set as the flow velocity of regulation, so have the function that is classified into thicker coarse dust and particle dust.With regard to the method that the flow velocity with the upwelling in the secondary combustion chamber 5 is set as the regulation flow velocity, determined owing to being directed to amount, primary combustion air capacity, the secondary combustion air amount of the free air delivery of secondary combustion chamber 5 by the electric furnace dust that carries out melting treatment, so undertaken by as the basis sectional area of secondary combustion chamber 5 being set as prescribed value take these.
The flow velocity of the upwelling by the exhaust in the suitable setting secondary combustion chamber 5, the coarse dust that is mainly electric furnace dust and reductive agent powdered carbon falls to secondary combustion chamber 5 bottoms, and the particle dust that mainly is made of zinc oxide and metal chloride is discharged from secondary combustion chamber 5 tops with air-flow.
The coarse dust that falls to the bottom of secondary combustion chamber 5 is reclaimed, is separated by coarse dust retrieving arrangement 7.The particle dust of discharging from secondary combustion chamber 5 tops on the other hand, is reclaimed by multitube gas cooler 35 bottoms, the deep bed filter 37 in downstream.
Flow velocity for the upwelling of the exhaust in the secondary combustion chamber 5 describes.
Fig. 2 is the chart of size distribution ratio and the accumulative total ratio of the particle dust of expression take zinc oxide as principal constituent, transverse axis represents particle diameter (mm), the longitudinal axis in left side represents the part by weight (%) of size-grade distribution, and the longitudinal axis on right side represents the part by weight of aggregate-value (%).
Fig. 3 is the chart of the size distribution of the coarse dust of expression take ferric oxide as principal constituent, and transverse axis represents particle diameter (mm), and the longitudinal axis in left side represents the part by weight of size-grade distribution (%), and the longitudinal axis on right side represents the part by weight of aggregate-value (%).
Fig. 4 is the chart of the particle velocity under 950 ℃ that are illustrated in as the exemplary gases temperature in the secondary combustion chamber 5, and the longitudinal axis represents settling velocity (m/s), and transverse axis represents particle diameter (mm).
According to chart shown in Figure 2,90% of the weight of particle dust is below the particle diameter 0.1mm.Therefore, for the ground of not sedimentation more than 90% of particle dust is discharged from secondary combustion chamber 5 tops with air-flow, as long as the upwelling speed of secondary combustion chamber 5 is set as with more than the corresponding settling velocity of particle diameter 0.1mm.According to the chart of Fig. 4, this upwelling speed is more than the 0.5m/s.
In addition, according to chart shown in Figure 3,90% of coarse dust weight is more than the particle diameter 0.22mm.Therefore, for coarse dust be not deposited to secondary combustion chamber 5 bottoms with not dispersing more than 90%, as long as upwelling speed is set as with below the corresponding settling velocity of particle diameter 0.22mm.According to the chart of Fig. 4, this speed is below the 2.0m/s.
In sum, in order to make the dust classification at the secondary combustion chamber 5 interior gravity settlings that utilize, with discharging from secondary combustion chamber 5 tops more than 90% of particle dust, make being deposited to secondary combustion chamber 5 bottoms more than 90% of coarse dust and reclaim, as long as be 0.5m/s～2.0m/s with the upstream Speed Settings in the secondary combustion chamber 5.
＜coarse dust retrieving arrangement＞
Coarse dust retrieving arrangement 7 is positioned at the bottom of secondary combustion chamber 5, reclaims the coarse dust of the bottom that is deposited in secondary combustion chamber 5.Particularly, can enumerate as shown in Figure 1, possess the spiral conveyer 31 of the bottom that is arranged on secondary combustion chamber 5 and discharge the coarse dust retrieving arrangement 7 that the coarse dust relief outlet 33 of the coarse dust of being carried by worm conveyor 31 forms.With regard to the coarse dust retrieving arrangement, except utilizing the continuous method of discharging of worm conveyor, also can consider in the bottom of secondary combustion chamber 5 returnable to be set, the method for discharging together with container at any time.
＜particle dust retrieving arrangement＞
Particle dust retrieving arrangement 9 is arranged on the downstream side of secondary combustion chamber 5, reclaims the particle dust take zinc oxide as principal constituent from the exhaust that secondary combustion chamber 5 is discharged.
Particularly, possess the exhaust that cooling imports from secondary combustion chamber 5 vertical katabatic drainage structure multitube gas cooler 35 and be arranged on the deep bed filter 37 in the downstream side of this multitube gas cooler 35.
Zinc oxide in the particulate falls to the bottom of multitube gas cooler 35 and is recovered.
Will be from multitube gas cooler 35 expellant gas atmospheric dilutions, be cooled to that the deep bed filter 37 that is configured in the downstream side can rationally turn round below 200 ℃.
To do not reclaimed by the zinc oxide in the particulate of multitube gas cooler 35 recovery with deep bed filter 37.
The metal recovery processes of the apparatus for recovering metal 1 of the present embodiment of formation describes to having used as mentioned above.
From hopper 11 to the fusion reducing furnace continuous supplying to reductive agents such as electric furnace dust and coke.In stove, utilize electric-arc heating, resistive heating to carry out heating and melting, reducing metal oxide this electric furnace dust.Ferric oxide in the electric furnace dust accumulates in the stove with the form of iron liquid, and zinc oxide is discharged to secondary combustion chamber 5 sides with the form of particulate.
From the high-temperature gas that fusion reducing furnace 3 is discharged, except containing zinc oxide fine particles, also contain CO (carbon monoxide converter) gas, carbon powder of reducing agent, metal vapors etc. and do not fire composition, metal chloride and the raw material dust etc. that disperses.With regard to this high-temperature gas, at first utilize secondary combustion air to make not fire into divided combustion in that secondary combustion chamber 5 is interior.As mentioned above, secondary combustion chamber 5 becomes to have the mode of sufficient residence time and forms the structure that vertical uplift flows, two in the gas
The English class obtains thermolysis.
Particle in the electric furnace dust is the thicker raw material dust and separate out the mixture of the particle dust (zinc oxide and metal chloride) of generation by gas phase of dispersing, and this dust utilizes the flow velocity of the upwelling in the secondary combustion chamber 5 to carry out classification.
That is, fall to secondary combustion chamber 5 bottoms as the coarse dust of electric furnace dust and reductive agent powdered carbon, reclaim, separate by coarse dust retrieving arrangement 7.In addition, the particle dust of discharging from secondary combustion chamber 5 tops with air-flow mainly is made of zinc oxide and metal chloride, is reclaimed by bottom and the deep bed filter 37 of the multitube gas cooler 35 in the downstream side of secondary combustion chamber 5.
As mentioned above, according to present embodiment, can be from containing the muriatic high-temperature exhaust air from fusion reducing furnace 3 of high density, in the situation of the problems such as generation device obstruction not, reclaim metal with high-level efficiency, and can make the long-time stabilization of operation of melting and reducing equipment.
［ embodiment 2 ］
Based on Fig. 5 embodiments of the present invention 2 are described.In Fig. 5, give identical symbol for the part identical with Fig. 1 of expression embodiment 1.
With regard to related the reclaiming with regard to the device 41 of metal from electric furnace dust of present embodiment, for the coarse dust that falls in secondary combustion chamber 5 is directly turned back in the fusion reducing furnace 3, overlapping mode when overlooking disposes with secondary combustion chamber 5 and fusion reducing furnace 3.Particularly, with secondary combustion chamber 5 overlook area more than 50% with the stove of fusion reducing furnace 3 in overlapping mode, secondary combustion chamber 5 is configured in fusion reducing furnace 3 tops.
According to present embodiment, the coarse dust of sedimentation directly turns back to fusion reducing furnace 3 in secondary combustion chamber 5, outside system, do not discharge, carry and turn back to the such coarse dust retrieving arrangement 7 of fusion reducing furnace 3 so do not need to arrange separately the coarse dust that will in secondary combustion chamber 5, fall shown in the embodiment 1, the formation of device is oversimplified, and reclaim reliably coarse dust, so can the good metal recovery of implementation efficiency.
Embodiment
Below illustrate the embodiment 1 of Fig. 1 related reclaim the concrete basic specification of the device of metal from electric furnace dust.
Specified electric furnace dust treatment capacity: 5 tons/hour
Stove internal diameter: 4m φ
Power supply capacity: 12MVA
Secondary combustion chamber size: internal diameter 2.5m φ * height 9m
Multitube gas cooler size: caliber 0.3m φ * length 7m * 12 piece
The secondary combustion chamber scale of construction and temperature: the 6500Nm that works off one's feeling vent one's spleen
3/ h * 720 ℃
The multitube gas cooler scale of construction and temperature: the 6500Nm that works off one's feeling vent one's spleen
3/ h * 390 ℃
Deep bed filter inlet gas amount and temperature: 15000Nm
3/ h * 180 ℃
Iron liquid yield: 1.25 tons/hour
Tutty yield: 2.0 tons/hour
ZnO:65 in the tutty～73%
Power lifetime: 3～5 days
Claims (4)
1. one kind is reclaimed the method for metal from electric furnace dust, it is characterized in that, and be that electric furnace dust 12% or more mainly carries out melting and reducing with electric energy with the total quality % of chlorine component and zinc composition, recovery iron liquid and zinc oxide,
Make the upstream speed of the melting and reducing heater exhaust in the secondary combustion chamber of fusion reducing furnace become the upwelling of 0.5m/s～2.0m/s, recovery is deposited to the coarse dust of described secondary combustion chamber bottom, separate with non-settling particle dust, particle dust is reclaimed the raw material of smelting as zinc.
2. one kind is reclaimed the device of metal from electric furnace dust, it is characterized in that, and be that electric furnace dust 12% or more mainly carries out melting and reducing with electric energy with the total quality % of chlorine component and zinc composition, recovery iron liquid and zinc oxide, described device possesses:
Fusion reducing furnace,
Secondary combustion chamber makes the exhaust upstream speed of this fusion reducing furnace become the upwelling of 0.5m/s～2.0m/s,
The coarse dust retrieving arrangement reclaims the coarse dust that is deposited to described secondary combustion chamber bottom, and
The particle dust retrieving arrangement is arranged on the exhaust outlet side of described secondary combustion chamber and reclaims particle dust.
3. one kind is reclaimed the device of metal from electric furnace dust, it is characterized in that, and be that electric furnace dust 12% or more mainly carries out melting and reducing with electric energy with the total quality % of chlorine component and zinc composition, recovery iron liquid and zinc oxide, described device possesses:
Fusion reducing furnace,
Secondary combustion chamber makes the exhaust upstream speed of this fusion reducing furnace become the upwelling of 0.5m/s～2.0m/s, and
The particle dust retrieving arrangement is arranged on the exhaust outlet side of described secondary combustion chamber and reclaims particle dust,
With described secondary combustion chamber with this secondary combustion chamber overlook area more than 50% with the stove of described fusion reducing furnace in overlapping mode be disposed at described fusion reducing furnace top.
4. according to claim 2 or the 3 described devices that reclaim metal from electric furnace dust, it is characterized in that, described particle dust retrieving arrangement possesses cooling from the multitube gas cooler of the katabatic drainage structure of the exhaust of described secondary combustion chamber discharge, and this multitube gas cooler is cooled to temperature out with the exhaust that is imported into to be become below 600 ℃.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2010/065809 WO2012035611A1 (en) | 2010-09-14 | 2010-09-14 | Method and apparatus for recovering metal from electric furnace dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103069023A true CN103069023A (en) | 2013-04-24 |
Family
ID=45831113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800684773A Pending CN103069023A (en) | 2010-09-14 | 2010-09-14 | Method and apparatus for recovering metal from electric furnace dust |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5541736B2 (en) |
| KR (1) | KR101434846B1 (en) |
| CN (1) | CN103069023A (en) |
| WO (1) | WO2012035611A1 (en) |
Cited By (3)
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|---|---|---|---|---|
| CN105483395A (en) * | 2016-01-19 | 2016-04-13 | 北京科技大学 | Method for selectively and efficiently extracting zinc and removing iron from zinc-containing electric furnace dust |
| CN107497224A (en) * | 2017-08-29 | 2017-12-22 | 太仓贝斯特机械设备有限公司 | One kind inhales bits equipment |
| CN108456786A (en) * | 2018-03-23 | 2018-08-28 | 新疆八钢铁股份有限公司 | The method that Ou Yelu disposes metallurgy industry solid waste containing zinc |
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| US20130300038A1 (en) * | 2012-05-10 | 2013-11-14 | Alstom Technology Ltd | Integrated gas cooling system for electric arc furnace |
| CN104596307A (en) * | 2015-01-31 | 2015-05-06 | 江西新金叶实业有限公司 | Smoke dust cooling and settling system |
| CN111945010B (en) * | 2020-08-24 | 2024-03-22 | 河南省德耀节能科技股份有限公司 | Efficient mine thermosetting waste recycling system and method |
| CN114350959A (en) * | 2021-12-03 | 2022-04-15 | 中冶赛迪技术研究中心有限公司 | Device and process flow for preparing zinc powder from zinc-containing electric furnace ash |
| CN117427450B (en) * | 2023-12-15 | 2024-04-12 | 云南乘风有色金属股份有限公司 | Dust metal recovery device of tin-smelting electric furnace |
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| CN101092664A (en) * | 2007-06-28 | 2007-12-26 | 南京钢铁联合有限公司 | Method for processing dust with zinc of electric furnace |
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| JPH0770662A (en) * | 1993-08-31 | 1995-03-14 | Sumitomo Metal Ind Ltd | Device for removing zinc in zinc-containing dust |
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| JP2008101826A (en) * | 2006-10-18 | 2008-05-01 | Nippon Spindle Mfg Co Ltd | Recycling method of electric furnace dust |
| JP2008291333A (en) * | 2007-05-26 | 2008-12-04 | Jfe Steel Kk | Method for producing molten iron by using vertical scrap-melting furnace |
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2010
- 2010-09-14 KR KR20127032557A patent/KR101434846B1/en active IP Right Grant
- 2010-09-14 CN CN2010800684773A patent/CN103069023A/en active Pending
- 2010-09-14 WO PCT/JP2010/065809 patent/WO2012035611A1/en active Application Filing
- 2010-09-14 JP JP2010540747A patent/JP5541736B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101680044A (en) * | 2007-06-04 | 2010-03-24 | 住友重机械工业株式会社 | Reduction treatment apparatus and method of reduction treatment |
| CN101092664A (en) * | 2007-06-28 | 2007-12-26 | 南京钢铁联合有限公司 | Method for processing dust with zinc of electric furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105483395A (en) * | 2016-01-19 | 2016-04-13 | 北京科技大学 | Method for selectively and efficiently extracting zinc and removing iron from zinc-containing electric furnace dust |
| CN107497224A (en) * | 2017-08-29 | 2017-12-22 | 太仓贝斯特机械设备有限公司 | One kind inhales bits equipment |
| CN108456786A (en) * | 2018-03-23 | 2018-08-28 | 新疆八钢铁股份有限公司 | The method that Ou Yelu disposes metallurgy industry solid waste containing zinc |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130028755A (en) | 2013-03-19 |
| JPWO2012035611A1 (en) | 2014-01-20 |
| WO2012035611A1 (en) | 2012-03-22 |
| KR101434846B1 (en) | 2014-08-27 |
| JP5541736B2 (en) | 2014-07-09 |
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