CN107326189A - A kind of system and method for handling utilising zinc containing waste residue - Google Patents
A kind of system and method for handling utilising zinc containing waste residue Download PDFInfo
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- CN107326189A CN107326189A CN201710530658.7A CN201710530658A CN107326189A CN 107326189 A CN107326189 A CN 107326189A CN 201710530658 A CN201710530658 A CN 201710530658A CN 107326189 A CN107326189 A CN 107326189A
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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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- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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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
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
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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
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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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
- C22B7/04—Working-up slag
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
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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
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Abstract
The invention provides a kind of system and method for handling utilising zinc containing waste residue.The system includes：Dehalogenation device, is exported provided with utilising zinc containing waste residue entrance and dehalogenation material；Densifier, provided with the outlet of dehalogenation material entrance, carbon containing material entrance and densification material, dehalogenation material entrance is connected with the dehalogenation material outlet of dehalogenation device；Reduction roasting device, provided with densification material entrance, zinc-containing dust outlet and the outlet of poor material, densification material entrance is connected with the densification material outlet of densifier.The present invention removes process by carrying out fluorine, chlorine to utilising zinc containing waste residue, can effectively reduce fluorine, the chlorinity in reduction roasting device, reduces body equipment and supporting preboiler, dust collecting system are etched.Also solve utilising zinc containing waste residue and reclaim obtained zinc-containing dust because fluorine, chlorinity are high, it is impossible to be used effectively, and the Zn-ef ficiency rate of recovery it is low the problem of.
Description
Technical field
The invention belongs to metallurgical technology field, in particular it relates to a kind of system and method for handling utilising zinc containing waste residue.
Background technology
During metal smelt, a certain amount of metallurgical dust sludge and metallurgical slag, such as steel works sintering, height are often incidentally produced
The waste residue containing zinc of dedusting ash, also the metal smelt process such as zinc, lead, copper that stove, electric furnace part are produced.In these melting waste slags
Still substantial amounts of recyclable valuable metal, such as zinc, lead, iron are contained.The recycling for strengthening such metallurgical slag is conducive to carrying
The high china natural resources rate of recovery, effectively smelting process is mainly reclaimed by thermal process at present.Such as in rotary kiln, fuming
Using coal-based direct reduction as general principle in stove or rotary hearth furnace, it will be volatilized in melting waste slag after the reduction of the compound such as zinc, lead, then
Reclaimed by supporting dust collecting system, obtain zinc-containing dust.
It should be noted that in metallurgical slag in addition to containing elements such as useful lead, zinc, iron, the overwhelming majority contains one
The halogens such as a little fluorine, chlorine, these fluorides, chloride are also by being volatized into dust collecting system, not only severe corrosion equipment,
And cause fluorine chlorine in zinc-containing dust to be seriously enriched with, wherein fluorine chlorinity can reach more than 1%, have impact on this kind of zinc-containing dust
Further purification is utilized.Existing wet method dechlorination process long flow path, acid consumption is big, and dechlorination efficiency is low, and easily cause oxide powder and zinc and
The loss of ferro element in metallurgical slag, lacks efficient, the economic processing method to such utilising zinc containing waste residue.
The content of the invention
Present invention seek to address that the fluorine, the dechlorination rate that exist when utilising zinc containing waste residue is recycled in the prior art are low, equipment corrodes
Serious the problems such as.
First, the invention provides a kind of system for handling utilising zinc containing waste residue, it includes：
Dehalogenation device, is exported provided with utilising zinc containing waste residue entrance and dehalogenation material；
Densifier, provided with the outlet of dehalogenation material entrance, carbon containing material entrance and densification material, the dehalogenation material entrance takes off with described
The dehalogenation material outlet of halogen device is connected；
Reduction roasting device, provided with densification material entrance, zinc-containing dust outlet and poor material outlet, the densification material entrance with
The densification material outlet of the densifier is connected.
Preferably, said system also includes：
Leaching device, it is described provided with zinc-containing dust entrance, leaching agent entrance, containing zinc lixiviating solution outlet and leached mud outlet
Zinc-containing dust entrance is connected with the zinc-containing dust outlet of the reduction roasting device；
Electrolysis carries zinc device, provided with entrance containing zinc lixiviating solution, zinc metal sheet outlet and waste liquid outlet, the entrance containing zinc lixiviating solution
It is connected with leaching device outlet containing zinc lixiviating solution.
In addition, present invention also offers a kind of method that utilization said system handles utilising zinc containing waste residue, comprising the following steps：
Utilising zinc containing waste residue is sent into the dehalogenation device, removed under neutral or oxidizing atmosphere in the utilising zinc containing waste residue
Fluorine and chlorine, obtain dehalogenation material；The utilising zinc containing waste residue also contains water and oxygen sulfur compound；
The dehalogenation material and carbon containing material are sent into the densifier and mixed and densification, densification material is obtained；
The densification material is sent into the reduction roasting device and carries out reduction volatilization, poor material and zinc-containing dust is obtained.
Preferably, methods described also comprises the following steps：
By the zinc-containing dust sulfuric acid leaching, obtain containing zinc lixiviating solution and leached mud, leachate electrolysis carried into zinc,
Obtain zinc metal sheet.
Preferably, O in the oxidizing atmosphere2Volumn concentration >=20%.
Preferably, the weight/mass percentage composition of the utilising zinc containing waste residue reclaimed water is that 1%-30%, the weight/mass percentage composition of zinc are
1%-20%, the weight/mass percentage composition of sulphur are 0.3%-10%.
Preferably, the weight/mass percentage composition of zinc is 40%-65%, fluorine, the weight/mass percentage composition of chlorine in the zinc-containing dust
≤ 0.015%.
Preferably, temperature be 650 DEG C -800 DEG C, the time be remove under conditions of 2h-5h the utilising zinc containing waste residue fluorine and
Chlorine.
Preferably, the densification material temperature be 1100 DEG C -1300 DEG C, the time be progress under conditions of 30min-60min
Reduction volatilization.
The present invention removes process by carrying out fluorine, chlorine to utilising zinc containing waste residue, can effectively reduce fluorine, the chlorine in reduction roasting device
Content, reduces body equipment and supporting preboiler, dust collecting system are etched.Also solve utilising zinc containing waste residue reclaim obtain contain
Zinc powder dirt is high because of fluorine, chlorinity, it is impossible to be used effectively, and the Zn-ef ficiency rate of recovery it is low the problem of.
Fluorine, chlorinity seldom, can be sent directly into wet-leaching technique and can use in zinc-containing dust produced by the present invention
In the zinc leaching residue of electrolysis, the loss of quality oxide zinc is reduced.Moreover, by control moisture content in utilising zinc containing waste residue, sulfur content and
Fluorine, the removal efficiency of chlorine can reach more than 95% in temperature, time, control climate condition when fluorine, chlorine removing, raw material.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention in a kind of processing utilising zinc containing waste residue system structural representation.
Fig. 2 be the embodiment of the present invention in a kind of processing utilising zinc containing waste residue process chart.
Embodiment
Below in conjunction with drawings and examples, the embodiment to the present invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
Apply the purpose that example is only explanation, rather than limitation of the present invention.
The utilising zinc containing waste residue that the present invention is used is one or more of in steel plant's dedusting ash, sludge, lead zinc-copper melting waste slag
Mixture.Zinc, lead are typically contained in utilising zinc containing waste residue, the element separately containing the easily reduction volatilization such as micro indium, silver, germanium.
As shown in figure 1, the system for the processing utilising zinc containing waste residue that the present invention is provided includes：Dehalogenation device 1, densifier 2, reduction
Calciner 3, leaching device 4 and electrolysis carry zinc device 5.
Dehalogenation device 1 is exported provided with utilising zinc containing waste residue entrance and dehalogenation material, and the fluorine, chlorine in utilising zinc containing waste residue are in the quilt of dehalogenation device 1
Removing.In the preferred embodiment of the invention, dehalogenation device 1 can be Rotary Kiln or multiple hearth furnace.
Densifier 2 is provided with dehalogenation material entrance, carbon containing material entrance and the outlet of densification material, dehalogenation material entrance and dehalogenation device 1
Dehalogenation material outlet be connected.Dehalogenation material and carbon containing material are mixed in densifier 2, densification.
Reduction roasting device 3 is provided with densification material entrance, zinc-containing dust outlet and the outlet of poor material, densification material entrance and densification
The densification material outlet of device 2 is connected.Densification material is reduced in reduction roasting device 3, obtains zinc-containing dust and poor material.At this
In invention preferred embodiment, reduction roasting device 3 can be rotary hearth furnace.
The present invention removes process by carrying out fluorine, chlorine to utilising zinc containing waste residue, can effectively reduce fluorine, the chlorine in reduction roasting device
Content, reduces body equipment and supporting preboiler, dust collecting system are etched.Also solve utilising zinc containing waste residue reclaim obtain contain
Zinc powder dirt is high because of fluorine, chlorinity, it is impossible to be used effectively, and the Zn-ef ficiency rate of recovery it is low the problem of.
Leaching device 4 is provided with zinc-containing dust entrance, leaching agent entrance, containing zinc lixiviating solution outlet and leached mud outlet, containing zinc
Dust inlet is connected with the zinc-containing dust outlet of reduction roasting device 3.
Electrolysis carries zinc device 5 provided with entrance containing zinc lixiviating solution, zinc metal sheet outlet and waste liquid outlet, entrance containing zinc lixiviating solution and leaching
The outlet containing zinc lixiviating solution for going out device 4 is connected.
Leaching device 4 and electrolysis, which carry zinc device 5, to be used to reclaim the zinc in zinc-containing dust.In zinc-containing dust produced by the present invention
Fluorine, chlorinity seldom, can be sent directly into wet-leaching technique and obtain, available for the zinc leaching residue being electrolysed, reducing quality oxide zinc
The loss of powder.It should be noted that obtained zinc-containing dust also can be otherwise utilized, or zinc is reclaimed using other equipment or method
Powder.Leached mud can also separate the metals such as lead, indium, silver by other extract technologies.
As shown in Fig. 2 the method that the utilization said system that the present invention is provided handles utilising zinc containing waste residue, comprises the following steps：
1) utilising zinc containing waste residue is sent into dehalogenation device 1, the fluorine and chlorine in utilising zinc containing waste residue is removed in an oxidizing atmosphere, is obtained
Dehalogenation material；Utilising zinc containing waste residue also contains water and oxygen sulfur compound.
In an oxidizing atmosphere, volatiling reaction can occur in dehalogenation device 1 for the fluorine chlorine compound in utilising zinc containing waste residue, simultaneously
The fluorine chlorine for being difficult to remove in lattice also reacts with the hydrone and oxygen sulfur compound in utilising zinc containing waste residue, forms fluoride or chlorine
Compound is able to remove with flue gas.
Temperature, time, control climate condition when being removed by controlling moisture content in utilising zinc containing waste residue, sulfur content and fluorine, chlorine,
Fluorine, the removal efficiency of chlorine can reach more than 95% in raw material.
In an oxidizing atmosphere, the fluorine chlorine compound in utilising zinc containing waste residue is easier occur volatiling reaction, of the invention preferred
Embodiment in, in an oxidizing atmosphere, removing utilising zinc containing waste residue in fluorine and chlorine, wherein, O in oxidizing atmosphere2Volume hundred
Divide content >=20%, it is possible thereby to ensure there are enough O in reaction system2Defluorinate, the reaction of chlorine are participated in oxygen sulfur compound
In.
The temperature of removing fluorine and chlorine is too high or overlong time can cause zinc in utilising zinc containing waste residue, lead oxides volatilization loss；Temperature
Spend that the low or time is too short, be unfavorable in utilising zinc containing waste residue the removing of the crystallization water and high price sulfureous phase (such as ferric subsulfate etc.)
Decompose, so as to be difficult to ensure that the removing of fluorine, chlorine.It is 650 DEG C of (degrees Celsius) -800 in temperature in the preferred embodiment of the invention
DEG C, the time be to remove the fluorine and chlorine of the utilising zinc containing waste residue under conditions of 2h (hour) -5h.It is furthermore preferred that the temperature of removing fluorine and chlorine
Spend for 700 DEG C -750 DEG C, the removing time is 2h-3h.
Certain water and oxygen sulfur compound must be contained in utilising zinc containing waste residue, the content of water and oxygen sulfur compound is by utilising zinc containing waste residue
Depending on the content of middle chloride.In general, the weight/mass percentage composition of the zinc about 1%- from the utilising zinc containing waste residue that steel plant come out
20%, now, the weight/mass percentage composition of utilising zinc containing waste residue reclaimed water is preferably 1%-30%, and the weight/mass percentage composition of sulphur is preferably
0.3%-10%.It is highly preferred that the weight/mass percentage composition of utilising zinc containing waste residue reclaimed water is preferably 3%-10%, the weight/mass percentage composition of sulphur
Preferably 2%-5%.Thus it can ensure to have enough moisture and sulphur to be reacted with chloride, generation gaseous state lead chloride, chlorination
Zinc etc., at high temperature volatilization removing.
2) dehalogenation material and carbon containing material are sent into densifier 2 and mixed and densification, obtain densification material.
Carbon containing material is the reducing agent containing carbon, for the reductive dehalogenation material in follow-up reduction volatilization step.In the present invention
In preferred embodiment, carbon containing material is one or more of mixtures in bituminous coal, anthracite, coke powder or charcoal.More preferably
Ground, carbon containing material is coke powder or charcoal, and fluorine chlorinity is low in coke powder and biomass carbon, can reduce fluorine chlorinity in zinc-containing dust,
Further erosion of the reduction to equipment.
Depending on amount of the consumption of carbon containing material according to the iron, lead, zinc compound that need to be reduced in dehalogenation material, the too low nothing of consumption
Method fully reduces material to be restored in dehalogenation material, the cost of the too high increase reducing agent of materials, and easily causes block pressure
The efflorescence of close material.In the preferred embodiment of the invention, the mass ratio of dehalogenation material and carbon containing material is 100：(5-25).
3) densification material is sent into and reduction volatilization is carried out in reduction roasting device 3, obtain poor material and zinc-containing dust.
It is to be restored during reduction volatilization reaction (i.e. reduction reaction and volatile material are volatized into the process of flue)
Block densification material in carbon and zinc, lead compound occur reduction reaction generation lead, zinc metal, lead, zinc metal are waved at high temperature
Hair becomes steam, and steam obtains the zinc-containing dust of high-quality in the flue of reduction roasting device 3 by re-oxidation.
Temperature when reduction volatilization is reacted is higher or the time is longer, and reduction volatilization reaction carries out more thorough, but temperature mistake
High or overlong time meeting wasted heat, and material melting can be caused.In the preferred embodiment of the invention, densification material is in temperature
It is to carry out reduction volatilization under conditions of 30min (minute) -60min for 1100 DEG C -1300 DEG C, time.
In the preferred embodiment of the invention, when the matter that the weight/mass percentage composition of utilising zinc containing waste residue reclaimed water is 1%-30%, zinc
When amount percentage composition is that 1%-20%, the weight/mass percentage composition of sulphur are 0.3%-10%, by control 1), 2), 3) step its
His condition, the weight/mass percentage composition that can make zinc in obtained zinc-containing dust is 40%-65%, fluorine, chlorine weight/mass percentage composition it is equal
≤ 0.015%.
4) by zinc-containing dust sulfuric acid leaching, obtain containing zinc lixiviating solution and leached mud.
5) leachate electrolysis is carried into zinc, obtains zinc powder and waste liquid.
Because the content of fluorine in obtained zinc-containing dust, chlorine is few, and the content of zinc is high, therefore can directly send to wet-leaching work
Skill, is leached using sulfuric acid, and then electrolysis carries zinc.Certainly, zinc-containing dust can be otherwise utilized as previously described, or uses other works
Skill carries out carrying zinc.Equally, leached mud can also separate the metals such as lead, indium, silver by other extract technologies as previously described.
Below with reference to specific embodiment, the present invention will be described.Institute's taking technique condition value is in following embodiments
Exemplary, its desirable number range, for the technological parameter not indicated especially, can refer to often as shown in foregoing summary
Rule technology is carried out.Detection method used in following embodiments is the conventional detection method of the industry.
Embodiment 1
The present embodiment is using the system shown in Fig. 1 and the PROCESS FOR TREATMENT utilising zinc containing waste residue shown in Fig. 2, and idiographic flow is as follows：
11) by iron vitriol slag (aqueous 3wt% (weight/mass percentage composition), Zn content are that 5.2wt%, lead content are
3.3wt%, chlorinity are that 0.2wt%, sulfur content are 10wt%) in feeding Rotary Kiln (dehalogenation device 1).Temperature in kiln is
720 DEG C, material residence time in kiln is 4h, while blasting air.Fluorine chlorinity is in the dehalogenation material obtained after removing chlorine
0.005wt%, removal efficiency reaches 98%.
12) dehalogenation material is sent into densifier 2 after cooling, and is incorporated the coke powder of dehalogenation material quality 18%, by mixing,
Densification material is made after densification.
13) densification material is sent into rotary hearth furnace (reduction roasting device 3), in-furnace temperature is controlled at 1100 DEG C -1200 DEG C, instead
Lead, zinc sulfate in 40min, ferrovanadium slag is answered to be further broken into lead oxide, zinc oxide, oxide is reduced to simple substance zinc, list
Matter lead, is oxidized to lead oxide and zinc oxide again in flue, and zinc in zinc-containing dust, zinc-containing dust is obtained by dust collecting system
Content is 47wt%, and lead content is that fluorine chlorinity is respectively less than 0.01wt% in 23wt%, dust.Surplus materials in rotary hearth furnace is
Poor material.Poor material is discharged out of the furnace by the drawing mechanism of rotary hearth furnace.
14) zinc-containing dust is sent into leaching device 4, obtains containing zinc lixiviating solution and leached mud after sulfuric acid leaching.
15) leachate feeding electrolysis is carried in zinc device 5 and carries zinc for electrolysis, obtain zinc metal sheet.
Embodiment 2
The present embodiment is using the system shown in Fig. 1 and the PROCESS FOR TREATMENT utilising zinc containing waste residue shown in Fig. 2, and idiographic flow is as follows：
21) by steel plant's dirt mud, (water content is that 30wt%, Zn content are that 1.5wt%, lead content are 0.2wt%, chlorinity
It is 0.3wt% for 0.5wt%, sulfur content) send into multiple hearth furnace (dehalogenation device 1).Temperature in stove is 650 DEG C, and material is in stove
Interior residence time is 2h, while blasting air.Fluorine chlorinity is 0.01wt%, removal efficiency in the dehalogenation material obtained after removing chlorine
Reach more than 94%.
22) dehalogenation material is sent into densifier 2 after cooling, and is incorporated the coke powder of dehalogenation material quality 5%, by mixing,
Densification material is made after densification.
23) densification material is sent into rotary hearth furnace (reduction roasting device 3), in-furnace temperature is controlled at 1200 DEG C -1300 DEG C, instead
Lead, zinc sulfate in 20min, steel plant's dirt mud is answered to be further broken into lead oxide, zinc oxide, oxide is reduced to simple substance
Zinc, elementary lead, are oxidized to lead oxide and zinc oxide again in flue, and zinc-containing dust, zincilate are obtained by dust collecting system
Zn content is 42wt% in dirt, and lead content is that fluorine chlorinity is respectively less than 0.015wt% in 8wt%, dust.Residue in rotary hearth furnace
Material is poor material.Poor material is discharged out of the furnace by the drawing mechanism of rotary hearth furnace.
24) zinc-containing dust is sent into leaching device 4, obtains containing zinc lixiviating solution and leached mud after sulfuric acid leaching.
25) leachate feeding electrolysis is carried in zinc device 5 and carries zinc for electrolysis, obtain zinc metal sheet.
Embodiment 3
The present embodiment is using the system shown in Fig. 1 and the PROCESS FOR TREATMENT utilising zinc containing waste residue shown in Fig. 2, and idiographic flow is as follows：
31) by conventional zinc leaching residue, (water content is that 10wt%, Zn content are that 17.2wt%, lead content are 3.6wt%, chlorine
Content is that 0.15wt%, sulfur content are 4wt%) in feeding multiple hearth furnace (dehalogenation device 1).Temperature in stove is 650 DEG C, and material exists
Residence time is 2h in stove, while blasting air.Fluorine chlorinity is 0.01wt%, removing in the dehalogenation material obtained after removing chlorine
Rate reaches more than 90%.
32) dehalogenation material is sent into densifier 2 after cooling, and is incorporated the coke powder of dehalogenation material quality 25%, by mixing,
Densification material is made after densification.
33) densification material is sent into rotary hearth furnace (reduction roasting device 3), in-furnace temperature is controlled at 1150 DEG C -1250 DEG C, instead
Lead, zinc sulfate in 35min, conventional zinc leaching residue is answered to be further broken into lead oxide, zinc oxide, oxide is reduced to simple substance
Zinc, elementary lead, are oxidized to lead oxide and zinc oxide again in flue, and zinc-containing dust, zincilate are obtained by dust collecting system
Zn content is 62wt% in dirt, and lead content is that fluorine chlorinity is respectively less than 0.015wt% in 12wt%, dust.It is surplus in rotary hearth furnace
Excess matter is poor material.Poor material is discharged out of the furnace by the drawing mechanism of rotary hearth furnace.
34) zinc-containing dust is sent into leaching device 4, obtains containing zinc lixiviating solution and leached mud after sulfuric acid leaching.
35) leachate feeding electrolysis is carried in zinc device 5 and carries zinc for electrolysis, obtain zinc metal sheet.
Embodiment 4
The present embodiment is using the system shown in Fig. 1 and the PROCESS FOR TREATMENT utilising zinc containing waste residue shown in Fig. 2, and idiographic flow is as follows：
41) by steel plant's dirt mud, (water content is that 30wt%, Zn content are that 1.5wt%, lead content are 0.2wt%, chlorinity
It is 0.3wt% for 0.5wt%, sulfur content) send into multiple hearth furnace (dehalogenation device 1).Temperature in stove is 800 DEG C, and material is in stove
Interior residence time is 2h, while blasting air.Fluorine chlorinity is less than 0.008wt% in the dehalogenation material obtained after de- fluorine and chlorine removal,
Removal efficiency reaches more than 95%.
42) dehalogenation material is sent into densifier 2 after cooling, and is incorporated the coke powder of dehalogenation material quality 5%, by mixing,
Densification material is made after densification.
43) densification material is sent into rotary hearth furnace (reduction roasting device 3), in-furnace temperature is controlled at 1200 DEG C -1300 DEG C, instead
Lead, zinc sulfate in 20min, steel plant's dirt mud is answered to be further broken into lead oxide, zinc oxide, oxide is reduced to simple substance
Zinc, elementary lead, are oxidized to lead oxide and zinc oxide again in flue, and zinc-containing dust, zincilate are obtained by dust collecting system
Zn content is 42wt% in dirt, and lead content is that fluorine chlorinity is respectively less than 0.015wt% in 8wt%, dust.Residue in rotary hearth furnace
Material is poor material, and poor material is discharged out of the furnace by the drawing mechanism of rotary hearth furnace.
44) zinc-containing dust is sent into leaching device 4, obtains containing zinc lixiviating solution and leached mud after sulfuric acid leaching.
45) leachate feeding electrolysis is carried in zinc device 5 and carries zinc for electrolysis, obtain zinc metal sheet.
It was found from above-described embodiment, the present invention removes process by carrying out fluorine, chlorine to utilising zinc containing waste residue, can effectively reduce reduction
Fluorine, chlorinity in calciner, reduce body equipment and supporting preboiler, dust collecting system are etched.Also solve and contain
Zinc waste residue reclaims obtained zinc-containing dust because fluorine, chlorinity are high, it is impossible to be used effectively, and the Zn-ef ficiency rate of recovery it is low the problem of.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and not to embodiment
Limit.For those of ordinary skill in the field, other multi-forms can also be made on the basis of the above description
Change or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is apparent
Change or change still in protection scope of the present invention among.
Claims (9)
1. a kind of system for handling utilising zinc containing waste residue, it is characterised in that including：
Dehalogenation device, is exported provided with utilising zinc containing waste residue entrance and dehalogenation material；
Densifier, provided with the outlet of dehalogenation material entrance, carbon containing material entrance and densification material, the dehalogenation material entrance is filled with the dehalogenation
The dehalogenation material outlet put is connected；
Reduction roasting device, provided with densification material entrance, zinc-containing dust outlet and poor material outlet, the densification material entrance with it is described
The densification material outlet of densifier is connected.
2. system according to claim 1, it is characterised in that also include：
Leaching device, it is described to contain zinc provided with zinc-containing dust entrance, leaching agent entrance, containing zinc lixiviating solution outlet and leached mud outlet
Dust inlet is connected with the zinc-containing dust outlet of the reduction roasting device；
Electrolysis carries zinc device, provided with entrance containing zinc lixiviating solution, zinc metal sheet outlet and waste liquid outlet, the entrance containing zinc lixiviating solution and institute
The outlet containing zinc lixiviating solution for stating leaching device is connected.
3. a kind of method that any system handles utilising zinc containing waste residue in utilization claim 1-2, it is characterised in that including as follows
Step：
Utilising zinc containing waste residue is sent into the dehalogenation device, the fluorine and chlorine in the utilising zinc containing waste residue are removed in an oxidizing atmosphere, is obtained
Obtain dehalogenation material；The utilising zinc containing waste residue also contains water and oxygen sulfur compound；
The dehalogenation material and carbon containing material are sent into the densifier and mixed and densification, densification material is obtained；
The densification material is sent into reduction volatilization is carried out in the reduction roasting device, obtain poor material and zinc-containing dust.
4. method according to claim 3, it is characterised in that also comprise the following steps：
By the zinc-containing dust sulfuric acid leaching, obtain containing zinc lixiviating solution and leached mud, leachate electrolysis is carried into zinc, obtained
Zinc metal sheet.
5. method according to claim 3, it is characterised in that O in the oxidizing atmosphere2Volumn concentration >=
20%.
6. method according to claim 3, it is characterised in that the weight/mass percentage composition of the utilising zinc containing waste residue reclaimed water is 1%-
30%th, the weight/mass percentage composition of zinc is that 1%-20%, the weight/mass percentage composition of sulphur are 0.3%-10%.
7. method according to claim 6, it is characterised in that the weight/mass percentage composition of zinc is in the zinc-containing dust
40%-65%, fluorine, chlorine weight/mass percentage composition≤0.015%.
8. method according to claim 3, it is characterised in that in the bar that temperature is 650 DEG C -800 DEG C, the time is 2h-5h
The fluorine and chlorine of the utilising zinc containing waste residue are removed under part.
9. method according to claim 3, it is characterised in that the densification material is 1100 DEG C -1300 DEG C, time in temperature
To carry out reduction volatilization under conditions of 30min-60min.
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Cited By (1)
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