CN108546829A - A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc - Google Patents
A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc Download PDFInfo
- Publication number
- CN108546829A CN108546829A CN201810314405.0A CN201810314405A CN108546829A CN 108546829 A CN108546829 A CN 108546829A CN 201810314405 A CN201810314405 A CN 201810314405A CN 108546829 A CN108546829 A CN 108546829A
- Authority
- CN
- China
- Prior art keywords
- zinc
- sludge containing
- containing zinc
- metallurgical dust
- dust sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
-
- 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
-
- 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
- C22B19/24—Obtaining zinc otherwise than by distilling with leaching with alkaline solutions, e.g. ammonia
-
- 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
- C22B7/001—Dry processes
-
- 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
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to a kind of methods of synthetical recovery of metallurgical dust sludge containing zinc processing, belong to the technical field for the solid waste processing that metallurgical engineering is intersected with environmental project.The present invention realizes the separation of iron, zinc by the selective reduction and magnetic separation to the metallurgical dust sludge containing zinc；By the low eutectic extraction to zinc-rich powder, the coordination dissolving of zinc is realized；Again by the electrochemical extraction to leachate, the high-purity extraction of zinc is realized.The present invention has many advantages, such as simple for process, mild condition, environmental-friendly, of low cost, and iron that can be in synthetical recovery metallurgical dust sludge containing zinc, zinc metallic element realize efficiently separating and extracting for zinc.
Description
Technical field
The present invention relates to a kind of methods of synthetical recovery of metallurgical dust sludge containing zinc processing, belong to metallurgical engineering and are handed over environmental project
The technical field of the solid waste processing of fork.
Background technology
Modern steel is produced using blast furnace ironmaking, converter and electric furnace steel making as major way, is generated in process of production a large amount of
Dust and sludge.A large amount of dust is one of main pollution sources of steel plant, while being also that steel plant are utilizable secondary
Resource.Not only there are higher iron content, while also higher zinc, lead content in dust.The source of zinc mainly exists in dust
Zinc-plated steel scrap and iron, the zinc mineral intergrowth largely used in steelmaking process.Zinc in iron ore and steel scrap volatilize, aoxidize in stove and
Almost all enters dust.External electric furnace uses a large amount of zinc-plated steel scrap as raw material, therefore its electric furnace dust zinc content ratio
It is higher.For the consideration to Fe, Zn utilization of resources and environmental protection, both at home and abroad to the processing growing interest of zinc-containing dust.
The target that steel plant handle zinc-containing dust be to the metals such as iron therein, zinc, lead secondary resource carry out separation and
It recycles, while not causing secondary pollution, it is also contemplated that cost problem.Traditional processing method includes mainly Physical, wet
Direct circulation application etc. in method, pyrogenic process and factory.
Specifically, in existing research, there are following several processing schemes：
1. a kind of method and apparatus recycling metal from electric furnace dust.The method is by the total of chlorine component and zinc ingredient
It counts the electric furnace dust that mass percent is 12% or more and carries out melting and reducing using electric energy, recycle iron liquid therein and zinc oxide,
Equipment therefor is fusion reducing furnace.But the technology, using the method for electric energy melting and reducing, temperature is high, and energy consumption is big；And
Waste residue is will produce, secondary pollution is formed.
2. a kind of processing method of dust with zinc of electric furnace.The method is to carry out dust with zinc of electric furnace with carbon, pelletizing, do
It is dry, it is put into rotary hearth furnace, 60~90min of reduction roasting under 1100~1200 DEG C of temperature conditions.The Zn steam that reduction generates draws
Enter 1100~1250 DEG C of oxidizing chambers and be oxidized to ZnO, is then re-introduced into cooling chamber and collects ZnO powder.Pelletizing after reduction is cooling
To semi metallized pellet, degree of metalization 60% or so, TFe contents are more than 50%, Zn contents and are less than 2%.But the technology restores
Time is long, and semi metallized pellet degree of metalization is low, and Zn contents are higher, is not implemented further and utilizes.
3. a kind of processing method of electric furnace dust.The method is to grind electric furnace dust, slag, reducing agent respectively, is ground
It is mixed after mill, pelletizing, pelletizing is made；Pelletizing is subjected to reduction roasting, volatile matter is obtained and carries out cooling collection, obtain zinc
Powder；Pelletizing is detached through water quenching, ore grinding, magnetic separation after reduction, obtains iron powder and tailing；Iron powder briquetting obtains iron block, tailing and raw stone
Ash and bauxite carry out mixing and fritting obtains fritting tailing.But the technology is using the methods of high temperature fritting, temperature
Height, energy consumption are big；And the zinc powder grade collected is relatively low, is unfavorable for high efficiency extraction and the utilization of resource.
4. a kind of method handling electric furnace dust with ionic liquid.The method mainly by electric furnace dust be dissolved in room temperature from
In sub- liquid, a series of electrochemical techniques then are carried out to dissolved mixed liquor to extract the elements such as zinc again.Although should
Technology has the advantages such as low energy consumption, ionic liquid is can be recycled, environmental pollution is few, however, there are also some problems,
If solution rate of the electric furnace dust in ionic liquid is slower, cause process treatment time longer, while the recovery rate of zinc is relatively low.
Reason is in Zinc-Bearing Wastes that zinc mainly exists in the form of zinc oxide, zinc ferrite etc., and zinc oxide is amphoteric oxide, is soluble in
Acid or alkali, this part zinc can leach completely, and zinc ferrite has the covalent bond of the oxonium ion form of tetrahedron and solid matter, structure ten
Point temperature, it is difficult to it leaches or reduction, thus the leaching or reduction of zinc become and recycle the main of zinc from electric furnace dust in zinc ferrite
Problem.
In conclusion the high efficiency extraction of zinc and separation are metallurgical and environmental area difficulties urgently to be resolved hurrily in metallurgical dust sludge containing zinc
Topic, there is an urgent need to a kind of recovery and treatment methods energy saving, efficient, that flow is short to be used to extract the zinc resource in metallurgical dust sludge containing zinc.
Invention content
In production status and dirt mud for the resource of metallurgical dust sludge containing zinc the problem of valuable element extraction research, this
Invention provides a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing, can be carried out to iron, the zinc in metallurgical dust sludge containing zinc
Recycling, it is environmental-friendly, it not will produce secondary pollution.
The present invention discloses a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing, the described method comprises the following steps：
Step A：The selective reduction of metallurgical dust sludge containing zinc and magnetic separation separation：Using reducing agent in 600 DEG C~1000 DEG C temperature
Under the conditions of restore metallurgical dust sludge containing zinc, the mixture after reduction is crushed, and is detached using magnetic method, richness iron is obtained
Powder and zinc-rich powder；
Step B：Low eutectic solvent coordination Leaching Zinc：It is under 50 DEG C~100 DEG C temperature conditions, zinc-rich powder is molten in low eutectic
It leached, filtered and is detached in agent, obtained and contain zinc lixiviating solution and filter residue；
Step C：Leachate electrochemical extraction zinc：Under 50 DEG C~100 DEG C temperature conditions, leachate is electrolysed, is obtained
Zinc cathode product must be contained；The cathode product of gained after electrolysis is taken out, is cleaned, high-purity Zn is obtained.
Preferably, the reducing agent in the step A is solid reductant or gaseous reducing agent.It is highly preferred that described consolidates
Body reducing agent is carbon dust, coke, coal dust, and the gaseous reducing agent is CO gases, H2Gas, CO gases and H2The mixing of gas
Gas, CO gases and CO2The mixed gas of gas.
Preferably, the reduction temperature in the step A is 750 DEG C~850 DEG C, and the recovery time is 0.5~2h.
Preferably, the low eutectic solvent in the step B is choline chloride-urea admixture, wherein urea molar fraction
0.40~0.75.
Preferably, the extraction time in the step B is 1~50 hour.
Preferably, the electrolysis mode in the step C is constant-potential electrolysis, and voltage range is 0.5V~3.5V；It is highly preferred that
Electrolysis mode in the step C is pulse electrolysis, and peak voltage range is 0.5V~3.5V, and duty ratio is 0.1~10, pulse frequency
Rate is 0~1000Hz；It is further preferred that electrolysis mode in the step C is constant-current electrolysis, current density is 0.1~
15mA/cm2。
The present invention is carried out using the process of selective reduction-coordination leaching-electrochemical extraction to containing zinc metallurgical dust sludge
Synthetical recovery processing realizes the high efficiency extraction separation of iron in metallurgical dust sludge containing zinc, zinc.Compared with prior art, the present invention has
It has the advantages that：The present invention is during selective reduction by controlling reducing agent type, reduction temperature, recovery time etc.
Parameter realizes the abundant dissociation of zinc ferrite in metallurgical dust sludge containing zinc, can selectively decompose zinc ferrite at a lower temperature, reduces
Energy consumption, and iron largely exists with ferroso-ferric oxide simultaneously, is conducive to subsequent iron resource recycling；Using choline chloride-urea
This novel low eutectic solvent realizes the leaching of Low Temperature Zn, overcomes the problems in traditional acid, alkali leaching process, realizes zinc
Coordination dissolving, and low eutectic solvent is Ke Xunhuanliyong, it is environmental-friendly, it is of low cost；By the zinc in electrochemical extraction leachate,
It realizes the high efficiency extraction of zinc and obtains high-purity Zn；Entire technological process apparatus is simple, mild condition, cost it is relatively low, it can be achieved that
Continuous production realizes green metallurgical.
Description of the drawings
Fig. 1 is a kind of flow chart of the method for synthetical recovery of metallurgical dust sludge containing zinc processing.
Specific implementation mode
Below in conjunction with drawings and examples, the specific implementation mode of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
It applies example to be for illustrative purposes only, rather than limiting the invention.
Embodiment 1
A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc, flow is as shown in Figure 1, include following procedure and step
Suddenly：
The ingredient of metallurgical dust sludge containing zinc in the present embodiment is as follows：Fe2O3(content of full iron conversion)≤80wt%, ZnO≤
15wt%, other≤5wt%.Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, supplying solid reductant coal dust is filled
Point mixing, then with 850 DEG C of temperature condition reduction roastings 1 hour in closed high temperature furnace.Powder after reduction is through cooling, broken
The rich iron powder that TFe grades are 89.5% and the zinc-rich powder that Zn grades are 34.2wt% are obtained after broken, grinding, magnetic separation separation,
Wherein the recovery rate of iron is 95%, and the recovery rate of zinc is 92%.Rich iron powder is returned into direct circulation application in factory；By zinc-rich powder
End is added in the low eutectic solvent of choline chloride-urea (molar ratio 1: 2), leaching 5 hours at 85 DEG C, then filters and divides
From obtaining leachate and filter residue, the recovery rate of zinc is 90% in leachate.Leachate is electrolysed at 75 DEG C, electrolysis side
Formula is constant-current electrolysis, current density 1.5mA/cm2, electrolysis time is 5 hours, and it is the pure of 99.5wt% to obtain purity in cathode
The recovery rate of zinc, zinc is 98%.Total recovery rate of zinc is 81% in metallurgical dust sludge containing zinc, and total recovery rate of iron is 95%.
Embodiment 2
The ingredient of metallurgical dust sludge containing zinc in the present embodiment is as follows：Fe2O3(content of full iron conversion)≤60wt%, ZnO≤
25wt%, other≤15wt%.Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, supplying solid reductant carbon dust carries out
It is sufficiently mixed, then with 750 DEG C of temperature condition reduction roastings 1.5 hours in closed high temperature furnace.Powder is through cooling, broken after reduction
The rich iron powder that TFe grades are 85.6wt% and the zinc-rich powder that Zn grades are 45.2wt% are obtained after broken, grinding, magnetic separation separation
End, the wherein recovery rate of iron are 93%, and the recovery rate of zinc is 91%.Rich iron powder is returned into direct circulation application in factory；It will be rich
Zinc powder is added in the low eutectic solvent of choline chloride-urea (molar ratio 1: 2), and leaching 10 hours, then take out at 65 DEG C
Filter detaches, acquisition leachate and filter residue, and the recovery rate of zinc is 88% in leachate.Leachate is electrolysed at 70 DEG C, electricity
Solution mode is constant-potential electrolysis, and voltage range 2.5V, electrolysis time is 4 hours, and it is the pure of 98.2wt% to obtain purity in cathode
The recovery rate of zinc, zinc is 97%.Total recovery rate of zinc is 78% in metallurgical dust sludge containing zinc, and total recovery rate of iron is 93%.
Embodiment 3
The ingredient of metallurgical dust sludge containing zinc in the present embodiment is as follows：Fe2O3(content of full iron conversion)≤75wt%, ZnO≤
15wt%, other≤10wt%.Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, be then charged into closed high temperature furnace.
The CO gases for being 30% using gas volume reduction roasting 2 hours at 800 DEG C.After reduction powder through cooling, broken, grinding,
The rich iron powder that TFe grades are 82.6wt% and the zinc-rich powder that Zn grades are 29.2wt%, wherein iron are obtained after magnetic separation separation
Recovery rate be 92%, the recovery rate of zinc is 90%.Rich iron powder is returned into direct circulation application in factory；Zinc-rich powder is added
In the low eutectic solvent of choline chloride-urea (molar ratio 1: 2), then leaching 30 hours at 75 DEG C filter separation, obtain
Leachate and filter residue, the recovery rate of zinc is 85% in leachate.Leachate is electrolysed at 75 DEG C, electrolysis mode is pulse
Current electroanalysis, peak voltage range are 1.5V, and duty ratio 0.5, pulse frequency 200Hz, electrolysis time is 3 hours；In cathode
The pure zinc that purity is 98.2wt% is obtained, the recovery rate of zinc is 95%.Total recovery rate of zinc is 73% in metallurgical dust sludge containing zinc, iron
Total recovery rate be 92%.
Embodiment 4
The ingredient of metallurgical dust sludge containing zinc in the present embodiment is as follows：Fe2O3(content of full iron conversion)≤75wt%, ZnO≤
15wt%, other≤10wt%.Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, be then charged into closed high temperature furnace.
The CO gases for being 30% using gas volume reduction roasting 2 hours at 800 DEG C.After reduction powder through cooling, broken, grinding,
The rich iron powder that TFe grades are 87.6wt% and the zinc-rich powder that Zn grades are 26.1wt%, wherein iron are obtained after magnetic separation separation
Recovery rate be 90%, the recovery rate of zinc is 88%.Rich iron powder is returned into direct circulation application in factory；Zinc-rich powder is added
In the low eutectic solvent of choline chloride-urea (molar ratio 1: 2), then leaching 15 hours at 75 DEG C filter separation, obtain
Leachate and filter residue, the recovery rate of zinc is 87% in leachate.Leachate is electrolysed at 75 DEG C, electrolysis mode is pulse
Current electroanalysis, peak voltage range are 2.5V, and duty ratio 8, pulse frequency 500Hz, electrolysis time is 6 hours；It is obtained in cathode
The pure zinc that purity is 98.2wt% is obtained, the recovery rate of zinc is 99%.Total recovery rate of zinc is 76% in metallurgical dust sludge containing zinc, iron
Total recovery rate is 90%.
Embodiment 5
The ingredient of metallurgical dust sludge containing zinc in the present embodiment is as follows：Fe2O3(content of full iron conversion)≤70wt%, ZnO≤
20wt%, other≤10wt%.Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, be then charged into closed high temperature furnace.
Utilize C0 and CO2Mixed gas reduction roasting 1 hour, wherein P at 850 DEG CCO/(PCO+PCO2) control 20% or so.Reduction
Powder acquisition TFe grades are 83.1wt% after cooling, broken, grinding, magnetic separation separation rich iron powder and Zn grades is afterwards
The zinc-rich powder of 36.3wt%, the wherein recovery rate of iron are 89%, and the recovery rate of zinc is 90%.Rich iron powder is returned straight in factory
Connect cycle applications；Zinc-rich powder is added in the low eutectic solvent of choline chloride-urea (molar ratio 1: 2), leaching is stirred at 85 DEG C
Go out 20 hours, then suction filtration separation, acquisition leachate and filter residue, the recovery rate of zinc is 93% in leachate.To leaching at 80 DEG C
Go out liquid to be electrolysed, solution mode is constant-current electrolysis, current density 1.0mA/cm2, electrolysis time is 2.5 hours；It is obtained in cathode
The pure zinc that purity is 97.2wt% is obtained, the recovery rate of zinc is 97%.Total recovery rate of zinc is 81% in metallurgical dust sludge containing zinc, iron
Total recovery rate is 89%.
Embodiment 6
The ingredient of metallurgical dust sludge containing zinc in the present embodiment is as follows：Fe2O3(content of full iron conversion)≤75wt%, ZnO≤
15wt%, other≤10wt%；Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, be then charged into closed high temperature furnace.
The H for being 10% using gas volume2Gas reduction roasting 1 hour at 750 DEG C.After reduction powder through cooling, broken, grinding,
The rich iron powder that TFe grades are 80.9wt% and the zinc-rich powder that Zn grades are 22.7wt%, wherein iron are obtained after magnetic separation separation
Recovery rate be 91%, the recovery rate of zinc is 89%.Rich iron powder is returned into direct circulation application in factory；Zinc-rich powder is added
In the low eutectic solvent of choline chloride-urea (molar ratio 1: 2), then leaching 10 hours at 90 DEG C filter separation, obtain
Leachate and filter residue, the recovery rate of zinc is 96% in leachate.Leachate is electrolysed at 65 DEG C, electrolysis mode is constant pressure
Electrolysis, voltage range 1.5V, electrolysis time are 6 hours, and the pure zinc that purity is 95.2wt%, the recovery rate of zinc are obtained in cathode
It is 96%.Total recovery rate of zinc is 82% in metallurgical dust sludge containing zinc, and total recovery rate of iron is 91%.
Comparative example
The ingredient of metallurgical dust sludge containing zinc in this comparative example is as follows：Fe2O3(content of full iron conversion)≤80wt%, ZnO≤
15wt%, other≤5wt%.Zinc metallurgical dust sludge will be contained and be ground to 75 μm or less, drying, choline chloride-urea is then added and (rubs
You are than 1: 2) in low eutectic solvent, then leaching 20 hours at 80 DEG C filter separation, obtain leachate and filter residue, leaching
The recovery rate for going out zinc in liquid is 40%, and the iron overwhelming majority is in filter residue.Leachate is electrolysed at 80 DEG C, electrolysis mode is
Constant-current electrolysis, current density 1.5mA/cm2, electrolysis time is 10 hours, and the pure zinc that purity is 98.5wt% is obtained in cathode,
The recovery rate of zinc is 90%.Total recovery rate of zinc is 36% in metallurgical dust sludge containing zinc.
The recovery rate of zinc and iron is shown in Table 1 under each step in embodiment and comparative example.
Table 1
By comparing it can be found that total recovery rate of zinc is far above in comparative example in embodiment 1-6, and it is molten in low eutectic
In the step of agent is leached, the recovery rate of the zinc in embodiment 1-6 is also far above in comparative example；In addition, can also in embodiment 1-6
High efficiente callback iron, the recovery rate nearly 90% or more of iron, and iron can not be effectively recycled in comparative example.This is essentially consisted in, the present invention
The technology path that selective reduction-coordination leaching-electrochemical extraction is used in embodiment 1-6, carries out to containing zinc metallurgical dust sludge
Selective reduction realizes ferrous acid in metallurgical dust sludge containing zinc by controlling the parameters such as reducing agent type, reduction temperature, recovery time
The abundant dissociation of zinc can selectively decompose zinc ferrite at a lower temperature, reduce energy consumption, and iron is most of with four oxidations simultaneously
Three-iron exists, and is conducive to subsequent iron resource recycling；In addition, in 1-6 of the embodiment of the present invention also use choline chloride-urea this
Novel low eutectic solvent realizes the leaching of Low Temperature Zn, overcomes the problems in traditional acid, alkali leaching process, realizes the coordination of zinc
Dissolving, and low eutectic solvent is Ke Xunhuanliyong, it is environmental-friendly, it is of low cost.Metallurgical dust sludge containing zinc provided by the invention integrates back
The method for receiving processing can realize the high efficiency extraction separation of iron in metallurgical dust sludge containing zinc, zinc, and entire technological process apparatus is simple,
Mild condition, cost is relatively low, it can be achieved that continuous production, realizes green metallurgical.
It should be noted that each embodiment above by reference to described in attached drawing be merely to illustrate the present invention and unrestricted
The range of invention, it will be understood by those of ordinary skill in the art that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent replacement that the present invention carries out, should all cover within the scope of the present invention.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of is used in combination with all or part of of any other embodiment.
Claims (9)
1. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing, which is characterized in that the described method comprises the following steps：
Step A：The selective reduction of metallurgical dust sludge containing zinc and magnetic separation separation：Using reducing agent in 600 DEG C~1000 DEG C temperature conditions
Lower reduction metallurgical dust sludge containing zinc, the mixture after reduction is crushed, and is detached using magnetic method, obtain rich iron powder and
Zinc-rich powder；
Step B：Low eutectic solvent coordination Leaching Zinc：Under 50 DEG C~100 DEG C temperature conditions, by zinc-rich powder in low eutectic solvent
It leached, filtered and is detached, obtained and contain zinc lixiviating solution and filter residue；
Step C：Leachate electrochemical extraction zinc：Under 50 DEG C~100 DEG C temperature conditions, leachate is electrolysed, is contained
Zinc cathode product；The cathode product of gained after electrolysis is taken out, is cleaned, high-purity Zn is obtained.
2. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1, which is characterized in that the step
Reducing agent in rapid A is solid reductant or gaseous reducing agent.
3. a kind of method of synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1 and 2, which is characterized in that institute
The solid reductant stated is carbon dust, coke, coal dust, and the gaseous reducing agent is CO gases, H2Gas, CO gases and H2Gas
Mixed gas, CO gases and CO2The mixed gas of gas.
4. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1, which is characterized in that the step
Reduction temperature in rapid A is 750 DEG C~850 DEG C, and the recovery time is 0.5~2h.
5. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1, which is characterized in that the step
Choline-urea admixture, wherein urea molar fraction 0.40~0.75 in rapid B.
6. a kind of method of synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1 and 5, which is characterized in that institute
It is 1~50 hour to state the extraction time in step B.
7. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1, which is characterized in that the step
Electrolysis mode in rapid C is constant-potential electrolysis, and voltage range is 0.5V~3.5V.
8. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1, which is characterized in that the step
Electrolysis mode in rapid C is pulse electrolysis, and peak voltage range is 0.5V~3.5V, and duty ratio is 0.1~10, pulse frequency 0
~1000Hz.
9. a kind of method of the synthetical recovery of metallurgical dust sludge containing zinc processing according to claim 1, which is characterized in that the step
Electrolysis mode in rapid C is constant-current electrolysis, and current density is 0.1~15mA/cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810314405.0A CN108546829A (en) | 2018-04-09 | 2018-04-09 | A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810314405.0A CN108546829A (en) | 2018-04-09 | 2018-04-09 | A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108546829A true CN108546829A (en) | 2018-09-18 |
Family
ID=63514540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810314405.0A Pending CN108546829A (en) | 2018-04-09 | 2018-04-09 | A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108546829A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763821A (en) * | 2020-07-23 | 2020-10-13 | 宝武集团环境资源科技有限公司 | Method and device for treating electroplating sludge |
| CN112111655A (en) * | 2020-08-31 | 2020-12-22 | 江苏科技大学 | Method for deleading and purifying zinc-containing dust |
| CN113234934A (en) * | 2021-05-20 | 2021-08-10 | 华北理工大学 | Zinc-containing smoke leaching treatment method and device for steel plant |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627890A (en) * | 2013-04-15 | 2014-03-12 | 长沙有色冶金设计研究院有限公司 | Zinc concentrate magnetizing roasting process equipment |
| CN104451126A (en) * | 2014-12-05 | 2015-03-25 | 中南大学 | Method for intensifying selective decomposition of zinc ferrite |
| CN104499002A (en) * | 2014-12-10 | 2015-04-08 | 上海大学 | Method for preparing copper-iron nano plated layer from low-grade sulfide ore through direct electro-deposition |
| CN104878408A (en) * | 2015-05-26 | 2015-09-02 | 上海大学 | Method for directly electrodepositing zinc oxide to prepare micro-nano zinc layer at low temperature |
-
2018
- 2018-04-09 CN CN201810314405.0A patent/CN108546829A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627890A (en) * | 2013-04-15 | 2014-03-12 | 长沙有色冶金设计研究院有限公司 | Zinc concentrate magnetizing roasting process equipment |
| CN104451126A (en) * | 2014-12-05 | 2015-03-25 | 中南大学 | Method for intensifying selective decomposition of zinc ferrite |
| CN104499002A (en) * | 2014-12-10 | 2015-04-08 | 上海大学 | Method for preparing copper-iron nano plated layer from low-grade sulfide ore through direct electro-deposition |
| CN104878408A (en) * | 2015-05-26 | 2015-09-02 | 上海大学 | Method for directly electrodepositing zinc oxide to prepare micro-nano zinc layer at low temperature |
Non-Patent Citations (2)
| Title |
|---|
| 杨莹: "电炉粉尘-深共晶溶剂选择性浸出锌的实验研究", 《第十一届中国钢铁年会论文集》 * |
| 韩俊伟: "CO 还原焙烧铁酸锌的选择性分解行为", 《中国有色金属学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763821A (en) * | 2020-07-23 | 2020-10-13 | 宝武集团环境资源科技有限公司 | Method and device for treating electroplating sludge |
| CN111763821B (en) * | 2020-07-23 | 2023-10-24 | 宝武集团环境资源科技有限公司 | Electroplating sludge treatment method and device |
| CN112111655A (en) * | 2020-08-31 | 2020-12-22 | 江苏科技大学 | Method for deleading and purifying zinc-containing dust |
| CN113234934A (en) * | 2021-05-20 | 2021-08-10 | 华北理工大学 | Zinc-containing smoke leaching treatment method and device for steel plant |
| CN113234934B (en) * | 2021-05-20 | 2022-11-01 | 华北理工大学 | Zinc-containing smoke leaching treatment method and device for steel plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111575489B (en) | Method for pyrogenically treating waste automobile exhaust catalyst | |
| CN110564970A (en) | Process method for recovering potassium, sodium and zinc from blast furnace cloth bag ash | |
| CN101775619B (en) | Clean metallurgical method for bismuth or antimony by wet process | |
| JP6219325B2 (en) | Method for producing metal manganese | |
| CN109750155A (en) | A method of the Call Provision from waste lithium ion cell anode material | |
| CN108546829A (en) | A method of the processing of the synthetical recovery of metallurgical dust sludge containing zinc | |
| CN107338454A (en) | A kind of method that copper and arsenic are reclaimed from white metal | |
| CN106048251A (en) | Technological method for cleaning and efficiently treating arsenic matte | |
| CN108130422A (en) | A kind of method that valuable metal is extracted in steel plant's flue dust | |
| CN111647754A (en) | Comprehensive utilization method of zinc-containing dust and sludge in steel plant | |
| JP6648674B2 (en) | Method for producing metallic manganese | |
| CN110863219B (en) | Method for resource utilization of zinc-containing converter dust and sludge | |
| CN100586617C (en) | Method for recycling and preparing ultra-fine zinc dust from zinc dust containing material | |
| CN110295285A (en) | A method of zinc is recycled from oxygen-enriched solid sulphur reduction melting clinker | |
| KR100791513B1 (en) | Recovery method of zinc(zn) from dust generated by electric arc furnace steelmaking | |
| CN105110300B (en) | The method that a kind of compound manganese ore of Containing Sulfur manganese extracts manganese and sulphur | |
| CN109055764A (en) | A kind of comprehensive recovering process of the low zinc material of high chlorine | |
| CN108624910A (en) | A kind of zinc Whote-wet method smelting process method of energy-saving and emission-reduction | |
| CN110965079B (en) | Method for efficiently and comprehensively recycling iron-rich metallurgical tailings | |
| CN111593205A (en) | Method for recovering cobalt from cobalt-containing sulfuric acid residue | |
| CN111876607B (en) | Leaching, enriching and separating process for iron and chromium elements in electric furnace dust | |
| CN102912124B (en) | Method for recovering nickel, cobalt, manganese and iron by hydrochloric acid leaching of nickel oxide ore | |
| CN102936649B (en) | Method for recovering nickel, cobalt, manganese and iron by roasting and leaching nickel oxide ore | |
| CN106702165A (en) | Method for leaching niobium and scandium from tailings | |
| CN206986256U (en) | A kind of system for handling utilising zinc containing waste residue |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180918 |