CN205907324U - System for handle zinc leaching residue - Google Patents
System for handle zinc leaching residue Download PDFInfo
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- CN205907324U CN205907324U CN201620899824.1U CN201620899824U CN205907324U CN 205907324 U CN205907324 U CN 205907324U CN 201620899824 U CN201620899824 U CN 201620899824U CN 205907324 U CN205907324 U CN 205907324U
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- leaching residue
- flue dust
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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
The utility model discloses a system for handle zinc leaching residue, include: drying device, it has zinc leaching residue entry and zinc leaching residue dry discharge, mixing arrangement, it has zinc leaching residue drier entry, anthracite entry and mixed material outlet, the rotary kiln, it has mixture inlet, the export of hot kiln slag and contains the export of zinc smoke and dust, hot pressing is in block puts, and it has hot kiln slag entry, blue charcoal entry, lime stone entry and the export of hot pressing pelletizing, the rotary hearth furnace, its smoke and dust export that has hot pressing pelletizing entry, the export of metal cluster piece and contain zinc oxide, lead oxide and silver, the dry separation device, it has metal cluster piece entry, metallic iron export and tailings export. This system can realize zinc leaching residue chinese railway, silver, zinc and plumbous comprehensive recovery to the volatility of sulphur reaches more than 80%, and the rate of recovery of iron reaches more than 90%, and zinc evaporation rate reaches more than 99%, and plumbous volatility reaches more than 98%, and silver -colored volatility reaches more than 85%.
Description
Technical field
This utility model belongs to metallurgical technology field, and specifically, this utility model is related to a kind of process zinc leaching residue
System.
Background technology
The smelting of zinc mainly has pyrogenic process and wet method two ways.Pyrogenic process is with high temperature fuming volatilization, in the form of zno flue dust
Return to leach and reclaim zinc therein；Wet method is high temperature high acidic oils, make zinc enter solution, simultaneously substantial amounts of ferrum also enter therewith molten
Liquid, subsequently removes ferrum using jarosite process, goethite process or hematite process, makes liquid containing zinc again return to neutral leaching and reclaims wherein
Zinc.For many years it was verified that with neutral leachings, high temperature high acid treatment leached mud, except ferrum, purification, the zinc hydrometallurgy being electrolysed,
Have the advantages that certain in the response rate of zinc, comprehensively recovering valuable metal, energy-conservation and environmental protection compared with pyrogenic process.So far zinc hydrometallurgy becomes
Produce the main method of zinc, in the total output of world's zinc, about 80% is to use wet production.
In Zinc Hydrometallurgy Process, two kinds of techniques are typically had to be reclaimed using two sections of neutral cadmias obtaining that leach, one is
Pyrogenic process, that is, adopt rotary kiln evaporation method；Another kind is wet method, i.e. hot acid solvent extraction method.Rotary kiln evaporation method is China's zinc hydrometallurgy
The typical process that Slag treatment uses, the domestic development through more than 30 years, its technology is ripe, existing with strain smelting as representative
More zine-smelting plant adopts.Zinc kiln slag is the leached mud coke powder with addition of 40%～50% again during zinc hydrometallurgy, operating condition difference
Need to allocate into 80%～100% coke powder, extract the residue after the metals such as zinc, lead under high temperature in rotary kiln.By by kiln
Slag is leached again, and acid consumption is huge.In addition, 92～94% zinc and 82～84% lead can be reclaimed by rotary kiln fuming volatilization
With 10% about silver, Zn content about 2～3% in kiln slag, lead 1%, ferrum 35～40%, especially silver content can reach 200
～350g/t, c content 12～18%, also very high value.
Rotary kiln technology, during processing zinc leaching residue, also has additive due to adding substantial amounts of coke, leads to
The yield of kiln slag is larger, and because content of beary metal is still exceeded, major part is directly stored up, and also has and transports to cement plant on a small quantity, causes
The waste of resource.The ferrum of kiln slag reclaims, silver recovery and lead zinc recycling difficulty are larger, and multiple technologies process route is feasible, but warp
Ji property is poor.
Therefore, the existing technology processing zinc leaching residue is further improved.
Utility model content
This utility model is intended at least solve one of technical problem in correlation technique to a certain extent.For this reason, this reality
Be to propose a kind of system processing zinc leaching residue with a new purpose, this system can realize ferrum in zinc leaching residue, silver,
Zinc and the synthetical recovery of lead, and the volatility of sulfur reaches more than 80%, and the response rate of ferrum reaches more than 90%, and Zinc volatilization rate reaches 99%
More than, lead volatility rate reaches more than 98%, and silver-colored volatility reaches more than 85%.
In one side of the present utility model, the utility model proposes a kind of system processing zinc leaching residue.According to this
The embodiment of utility model, this system includes:
Drying unit, described drying unit has zinc leaching residue entrance and zinc leaching residue drier outlet；
Mixing arrangement, described mixing arrangement has zinc leaching residue siccative entrance, anthracite entrance and mixed material outlet, institute
State zinc leaching residue siccative entrance to be connected with described zinc leaching residue drier outlet；
Rotary kiln, described rotary kiln has mixed material entrance, the outlet of hot kiln slag and zinc smoke outlet, described mixing
Material inlet is connected with the outlet of described mixed material；
Hot pressing block assembly, described hot pressing block assembly has hot kiln slag entrance, semi-coke entrance, limestone entrance and hot pressing ball
Group's outlet, described hot kiln slag entrance is exported with described hot kiln slag and is connected；
Rotary hearth furnace, described rotary hearth furnace have hot pressing pelletizing entrance, granular metal outlet and containing zinc oxide, lead oxide and
The flue dust outlet of silver, described hot pressing pelletizing entrance is connected with the outlet of described hot pressing pelletizing；
Dry separation device, described dry separation device has granular metal entrance, metallic iron outlet and tailings outlet, described metal group
Block entrance is connected with the outlet of described granular metal.
Thus, the system of the process zinc leaching residue according to this utility model embodiment pass through by zinc leaching residue siccative with smokeless
Supply and carry out pre-reduction treatment to rotary kiln after coal mixing, and by reducing anthracitic amount of allocating it is ensured that in rotary kiln
Preheating section is oxidizing atmosphere, thus promoting the volatilization of the decomposition of sulfate and sulfur dioxide in zinc leaching residue, ensures kiln simultaneously
Interior is weak reducing atmosphere for pre-reduction stage, thus reduce zinc sulfide generation so that most of zinc in zinc leaching residue and
Lead volatility carries out being recovered in the form of zinc oxide and lead oxide in flue, secondly by hot for gained in rotary kiln kiln slag and semi-coke
Carry out hot wafering process with limestone, the sensible heat of hot kiln slag not only can be made full use of, and the addition of semi-coke can ensure that
It is reducing atmosphere in rotary hearth furnace, more of the prior art hot for gained kiln slag is carried out carrying out drying and processing after Water Quenching again
Compare, the application not only eliminates the water quenching technology in original technique, and eliminates the drying cost of kiln slag after water quenching, and
The addition of semi-coke can realize remaining zinc and the reduction of low price iron oxides and the reduction of silver and volatilization in kiln slag, thus in fall
Improve ferrum, the reduction efficiency of silver, zinc and lead in secondary reduction processing procedure, in addition after being added in of limestone while low energy consumption
The effect of flux not only can be played during continuous, and the agglomeration of iron particle in reduction process can be promoted, thus
Ensure that gained granular metal has higher degree of metalization while reducing energy consumption, and by being obtained using hot pressing form
Hot pressing pelletizing supply and carry out secondary reduction process to rotary hearth furnace, the utilization rate of reducing agent can be significantly improved, and warp again
Dry separation processes and can achieve slag sluicing system.Thus, ferrum in zinc leaching residue, silver, zinc and lead can be realized using the system of the application
Synthetical recovery, and the volatility of sulfur reaches more than 80%, and the response rate of ferrum reaches more than 90%, and Zinc volatilization rate reaches more than 99%,
Lead volatility rate reaches more than 98%, and silver-colored volatility reaches more than 85%.
Optional, the described system processing zinc leaching residue further includes: waste-heat recovery device, described waste-heat recovery device
Have flue dust entrance and cooling flue dust outlet, described flue dust entrance respectively with described zinc smoke outlet and described containing oxidation
Zinc, lead oxide are connected with the flue dust outlet of silver；Chiller, described chiller has cooling flue dust entrance and cooling flue dust goes out
Mouthful, described cooling flue dust entrance is connected with described cooling flue dust outlet；Bagroom, described bagroom has cooling cigarette
Dirt entrance, dust outlet and gas outlet, described cooling flue dust entrance is connected with described cooling flue dust outlet.
Additional aspect of the present utility model and advantage will be set forth in part in the description, partly will be from explained below
In become obvious, or recognized by practice of the present utility model.
Brief description
Above-mentioned and/or additional aspect of the present utility model and advantage will from reference to the description to embodiment for the accompanying drawings below
Become obvious and easy to understand, wherein:
Fig. 1 is the system structure diagram of the process zinc leaching residue according to one embodiment of this utility model；
Fig. 2 is the system structure diagram of the process zinc leaching residue according to this utility model further embodiment；
Fig. 3 is that the system of the process zinc leaching residue using one embodiment of this utility model is implemented to process the side of zinc leaching residue
Method schematic flow sheet；
Fig. 4 is that the system of the process zinc leaching residue using this utility model further embodiment is implemented to process zinc leaching residue
Method flow schematic diagram.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of described embodiment is shown in the drawings, wherein ad initio
To the element that same or similar label represents same or similar element or has same or like function eventually.Below by ginseng
The embodiment examining Description of Drawings is exemplary it is intended to be used for explaining this utility model, and it is not intended that to this utility model
Restriction.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limit unless otherwise clear and definite.Common skill for this area
For art personnel, concrete meaning in this utility model for the above-mentioned term can be understood as the case may be.
In one side of the present utility model, the utility model proposes a kind of system processing zinc leaching residue.According to this
The embodiment of utility model, with reference to Fig. 1 and 2, this system includes: drying unit 100, mixing arrangement 200, rotary kiln 300, hot pressing
Block assembly 400, rotary hearth furnace 500 and dry separation device 600.
According to embodiment of the present utility model, drying unit 100 has zinc leaching residue entrance 101 and zinc leaching residue siccative goes out
Mouth 102, and be suitable to for zinc leaching residue to carry out drying and processing, obtain zinc leaching residue siccative.Thus, it is possible to significantly improve subsequently in advance also
The volatilization efficiency of former stage sulfur and the organic efficiency of zinc and lead.Specifically, in gained zinc leaching residue siccative, water content is not higher than
10wt%.
According to embodiment of the present utility model, mixing arrangement 200 has zinc leaching residue siccative entrance 201, anthracite entrance
202 and mixed material outlet 203, zinc leaching residue siccative entrance 201 is connected with zinc leaching residue drier outlet 102, and be suitable to will be upper
State the zinc leaching residue siccative obtaining to be mixed with anthracite, obtain mixed material.Specifically, mixing arrangement can be given for disk
Material machine.
According to an embodiment of the present utility model, zinc leaching residue siccative is not especially limited with anthracite mixed proportion
System, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, zinc leaching residue
Siccative is 100:(20～30 with anthracite according to mass ratio) mixed.Inventor finds, if anthracite amount of allocating is too high, no
Method ensures that in rotary kiln, preheating section is oxidizing atmosphere, thus being unfavorable for the decomposition of sulfate and sulfur dioxide in zinc leaching residue
Volatilization, and anthracite amount of allocating is too high surplus carbon can be led in the hot kiln slag of follow-up gained too high and increase reducing agent cost, and
And the fuel availability in rotary kiln is low, it is not suitable for adding excessive anthracite in this stage, and if anthracite amount of allocating mistake
Low, do not have the effect of prereduction.Thus, by being 100:(20～30 by zinc leaching residue siccative and anthracite according to mass ratio)
Mixed, reducing agent cost not only can be saved, and can ensure that in kiln as pre-reduction stage is weak reducing atmosphere, from
And reduce zinc sulfide generation so that after most of zinc in zinc leaching residue and lead reduce volatilization carry out in flue to aoxidize
The form of zinc and lead oxide is recovered.
According to embodiment of the present utility model, rotary kiln 300 has mixed material entrance 301, hot kiln slag exports 302 and
Zinc smoke outlet 303, mixed material entrance 301 is connected with mixed material outlet 203, and is suitable to mixture obtained above
Material supply carries out pre-reduction treatment to rotary kiln, obtains hot kiln slag and zinc smoke.Specifically, anthracitic by reducing
Amount of allocating it is ensured that in rotary kiln preheating section be oxidizing atmosphere, thus promoting the decomposition of sulfate and titanium dioxide in zinc leaching residue
The volatilization of sulfur, guarantee kiln is interior simultaneously is weak reducing atmosphere for pre-reduction stage, thus reducing the generation of zinc sulfide so that zinc soaks
Volatilization after the most of zinc slagged tap and lead reduce carries out being recovered in the form of zinc oxide and lead oxide in flue, obtains final product
Arrive the zinc smoke containing zinc oxide and lead oxide.According to specific embodiment of the utility model, the temperature of pre-reduction treatment can
Think 800～1150 degrees Celsius.Thus, the recovery in the volatilization efficiency improving pre-reduction stage sulfur further and zinc and lead is imitated
Effectively prevent the fusing of material bonding and ring formation of rotary kiln while rate, so that material is lumpd less, be conducive to follow-up hot wafering work
Skill.And through detection, the volatility of sulfur reaches more than 80%, and Zinc volatilization rate reaches more than 99%, lead volatility rate reaches more than 98%, silver
Volatility reaches more than 85%.
According to embodiment of the present utility model, hot pressing block assembly 400 have hot kiln slag entrance 401, semi-coke entrance 402,
Limestone entrance 403 and hot pressing pelletizing outlet 404, hot kiln slag entrance 401 and hot kiln slag outlet 302 is connected, and be suitable to by
Hot kiln slag obtained above carries out hot wafering process with semi-coke and limestone, obtains hot pressing pelletizing.Inventor finds, by inciting somebody to action
In rotary kiln, the hot kiln slag of gained and semi-coke and limestone carry out hot wafering process, not only can make full use of the aobvious of hot kiln slag
Hot for gained kiln slag more of the prior art is entered by heat, and the addition of semi-coke can ensure that in rotary hearth furnace to be reducing atmosphere
Carry out drying and processing after row Water Quenching again to compare, the application not only eliminates the water quenching technology in original technique, and saves
The drying cost of kiln slag after water quenching, and the addition of semi-coke can realize the reduction of remaining zinc and low price iron oxides in kiln slag
And the reduction of silver and volatilization, thus improve while reducing energy consumption ferrum, silver, zinc and lead in secondary reduction processing procedure also
Former efficiency, in addition limestone be added in the effect that not only can play flux in subsequent process, and can promote reduce
During iron particle agglomeration, thus while reducing energy consumption ensure gained granular metal there is higher metallization
Rate, and carry out secondary reduction process, Ke Yixian to rotary hearth furnace by supplying the hot pressing obtaining using hot pressing form pelletizing
Write the utilization rate improving reducing agent, and process i.e. achievable slag sluicing system through dry separation again.In this step, specifically, rotary kiln
The hot kiln slag of 800 DEG C of middle gained carries out hot wafering with semi-coke and limestone again through air-cooled being cooled to after less than 500 DEG C, thus can
To be prevented effectively from the scaling loss of semi-coke.
According to an embodiment of the present utility model, hot kiln slag is not subject to especially with the mixed proportion of semi-coke and limestone
Limit, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, hot kiln
Slag can be 100:(10～20 according to mass ratio with semi-coke and limestone): (5～25) are mixed.Thus, using this mixing
Ratio, not only can significantly improve the utilization ratio of reducing agent, and can realize remaining zinc and low price iron oxides in kiln slag
Reduction and the reduction of silver and volatilization, thus improve while reducing energy consumption ferrum in secondary reduction processing procedure, silver, zinc and
The reduction efficiency of lead, and then obtain the granular metal of higher metal rate.
According to embodiment of the present utility model, rotary hearth furnace 500 have hot pressing pelletizing entrance 501, granular metal outlet 502 with
And the flue dust containing zinc oxide, lead oxide and silver exports 503, hot pressing pelletizing entrance 501 is connected with hot pressing pelletizing outlet 404, and
It is suitable to supply hot pressing pelletizing obtained above and carries out secondary reduction process to rotary hearth furnace, obtain granular metal and containing oxidation
The flue dust of zinc, lead oxide and silver.Inventor finds, carries out reduction treatment by supplying hot pressing pelletizing, wherein to rotary hearth furnace
Semi-coke can realize in kiln slag remaining zinc and the reduction of low price iron oxides and the reduction of silver and volatilization, obtain granular metal
And the flue dust containing zinc oxide, lead oxide and silver (wherein thing in flue dust for the silver is mutually silver oxide, Argentous sulfide. and silver-colored simple substance),
Thus improving ferrum, the reduction efficiency of silver, zinc and lead in secondary reduction processing procedure, in addition limestone while reducing energy consumption
Be added in the effect that not only can play flux in subsequent process, and can promote iron particle in reduction process gathering long
Greatly, thus ensureing that while reducing energy consumption gained granular metal has higher degree of metalization, and by will be using hot pressing
The hot pressing pelletizing that form obtains supplies and carries out secondary reduction process to rotary hearth furnace, can significantly improve the utilization rate of reducing agent,
And process through dry separation again and can achieve slag sluicing system.After testing, the volatility of sulfur reaches more than 80%, Zinc volatilization rate reach 99% with
On, lead volatility rate reaches more than 98%, and silver-colored volatility reaches more than 85%.According to specific embodiment of the utility model, secondary reduction
The temperature of processing procedure can be 1250～1400 DEG C, and the time can be 15～40 minutes.Thus, it is possible to significantly improve secondary going back
The reduction efficiency of former processing procedure.
According to embodiment of the present utility model, dry separation device 600 has granular metal entrance 601, metallic iron exports 602 and
Tailings outlet 603, granular metal entrance 601 is connected with granular metal outlet 502, and is suitable to enter granular metal obtained above
Row dry separation is processed, and obtains metallic iron and tailings.
Specifically, by can achieve after cooled for gained granular metal, broken, dry type magnetic separation metal iron powder and mine tailing point
From.After testing, the response rate of metallic iron reaches more than 90%.
The system of the process zinc leaching residue according to this utility model embodiment is by mixing zinc leaching residue siccative and anthracite
Supply after conjunction and carry out pre-reduction treatment to rotary kiln, and by reducing anthracitic amount of allocating it is ensured that preheating in rotary kiln
Section is oxidizing atmosphere, thus promoting the volatilization of the decomposition of sulfate and sulfur dioxide in zinc leaching residue, is in guarantee kiln simultaneously
Pre-reduction stage is weak reducing atmosphere, thus reducing the generation of zinc sulfide so that the most of zinc in zinc leaching residue and lead are waved
Send out and carry out being recovered in the form of zinc oxide and lead oxide in flue, secondly by hot for gained in rotary kiln kiln slag and semi-coke and stone
Lime stone carries out hot wafering process, not only can make full use of the sensible heat of hot kiln slag, and the addition of semi-coke can ensure that and turns bottom
It is reducing atmosphere in stove, more of the prior art hot for gained kiln slag is carried out carrying out drying and processing phase after Water Quenching again
The application not only eliminates the water quenching technology in original technique to ratio, and eliminates the drying cost of kiln slag after water quenching, and blue
The addition of charcoal can realize remaining zinc and the reduction of low price iron oxides and the reduction of silver and volatilization in kiln slag, thus reducing
Improve ferrum, the reduction efficiency of silver, zinc and lead in secondary reduction processing procedure while energy consumption, in addition limestone be added in follow-up
During not only can play the effect of flux, and the agglomeration of iron particle in reduction process can be promoted, thus
Ensure while reducing energy consumption that gained granular metal has a higher degree of metalization, and by being obtained using hot pressing form
Hot pressing pelletizing supplies and carries out secondary reduction process to rotary hearth furnace, can significantly improve the utilization rate of reducing agent, and again through dry
Choosing processes and can achieve slag sluicing system.Thus, ferrum in zinc leaching residue, silver, zinc and lead can be realized using the system of the application
Synthetical recovery, and the volatility of sulfur reaches more than 80%, and the response rate of ferrum reaches more than 90%, and Zinc volatilization rate reaches more than 99%, lead
Volatility reaches more than 98%, and silver-colored volatility reaches more than 85%.
With reference to Fig. 2, the system of the process zinc leaching residue according to this utility model embodiment further includes: waste heat boiler
700th, chiller 800 and bagroom 900.
According to embodiment of the present utility model, waste heat boiler 700 has flue dust entrance 701 and cooling flue dust outlet 702, cigarette
Dirt entrance 701 is connected with zinc smoke outlet 303 and the outlet of the flue dust containing zinc oxide, lead oxide and silver 503 respectively, and is suitable to
Rotary kiln is obtained zinc smoke and the flue dust containing zinc oxide, lead oxide and silver that rotary hearth furnace obtains carries out waste heat recovery,
Obtain flue dust of lowering the temperature.Thus, remaining by carrying out to obtained zinc smoke and the flue dust containing zinc oxide, lead oxide and silver
This part of waste heat can be used for generating electricity by recuperation of heat, and the temperature of flue dust of lowering the temperature is down to 400 DEG C about, thus realizing resource
Maximally utilize.
According to embodiment of the present utility model, chiller 800 has cooling flue dust entrance 801 and cooling flue dust outlet
802, cooling flue dust entrance 801 is connected with cooling flue dust outlet 702, and is suitable to carry out cooling flue dust obtained above at cooling
Reason, can be cooled flue dust.Specifically, chiller can be surface-cooler, and flue dust of lowering the temperature is through surface-cooler
Temperature is down to 250 DEG C about afterwards.
According to embodiment of the present utility model, bagroom 900 has cooling flue dust entrance 901, dust outlet 902 and
Gas access 903, cooling flue dust entrance 901 is connected with cooling flue dust outlet 802, and is suitable to enter cooling flue dust obtained above
Row bag collection, such that it is able to collect dust.
Understand for convenience, below with reference to the system to the process zinc leaching residue using this utility model embodiment for the Fig. 3 and 4
The method implementing to process zinc leaching residue is described in detail, and according to embodiment of the present utility model, the method includes:
S100: zinc leaching residue is carried out drying and processing
According to embodiment of the present utility model, zinc leaching residue is carried out drying and processing, obtain zinc leaching residue siccative.Thus,
The volatilization efficiency of follow-up pre-reduction stage sulfur and the organic efficiency of zinc and lead can be significantly improved.Specifically, gained zinc leaches
In slag siccative, water content is not higher than 10wt%.
S200: zinc leaching residue siccative is mixed with anthracite
According to embodiment, zinc leaching residue siccative obtained above is mixed with anthracite, is obtained mixed material.Tool
Body, zinc leaching residue siccative can be mixed in disk feeder with anthracite.
According to an embodiment of the present utility model, zinc leaching residue siccative is not especially limited with anthracite mixed proportion
System, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, zinc leaching residue
Siccative is 100:(20～30 with anthracite according to mass ratio) mixed.Inventor finds, if anthracite amount of allocating is too high, no
Method ensures that in rotary kiln, preheating section is oxidizing atmosphere, thus being unfavorable for the decomposition of sulfate and sulfur dioxide in zinc leaching residue
Volatilization, and anthracite amount of allocating is too high surplus carbon can be led in the hot kiln slag of follow-up gained too high and increase reducing agent cost, and
And the fuel availability in rotary kiln is low, it is not suitable for adding excessive anthracite in this stage, and if anthracite amount of allocating mistake
Low, do not have the effect of prereduction.Thus, by being 100:(20～30 by zinc leaching residue siccative and anthracite according to mass ratio)
Mixed, reducing agent cost not only can be saved, and can ensure that in kiln as pre-reduction stage is weak reducing atmosphere, from
And reduce zinc sulfide generation so that after most of zinc in zinc leaching residue and lead reduce volatilization carry out in flue to aoxidize
The form of zinc and lead oxide is recovered.
S300: mixed material is supplied and carries out pre-reduction treatment to rotary kiln
According to embodiment of the present utility model, mixed material obtained above is supplied and carries out at prereduction to rotary kiln
Reason, obtains hot kiln slag and zinc smoke.Specifically, by reducing anthracitic amount of allocating it is ensured that preheating section is in rotary kiln
Oxidizing atmosphere, thus promoting the volatilization of the decomposition of sulfate and sulfur dioxide in zinc leaching residue, ensures to go back for pre- in kiln simultaneously
The former stage is weak reducing atmosphere, thus reducing the generation of zinc sulfide so that the most of zinc in zinc leaching residue and lead occur also
After former, volatilization carries out being recovered in the form of zinc oxide and lead oxide in flue, that is, obtain containing zinc oxide and lead oxide containing zinc
Flue dust.According to specific embodiment of the utility model, the temperature of pre-reduction treatment can be 800～1150 degrees Celsius.Thus, exist
Effectively prevent material bonding from melting while the organic efficiency of the volatilization efficiency of raising pre-reduction stage sulfur and zinc and lead further
Change and ring formation of rotary kiln, so that material is lumpd less, be conducive to follow-up hot wafering technique.And through detection, the volatility of sulfur
Reach more than 80%, Zinc volatilization rate reaches more than 99%, lead volatility rate reaches more than 98%, and silver-colored volatility reaches more than 85%.
S400: hot kiln slag is carried out hot wafering process with semi-coke and limestone
According to embodiment of the present utility model, hot kiln slag obtained above is carried out at hot wafering with semi-coke and limestone
Reason, obtains hot pressing pelletizing.Inventor finds, by hot for gained in rotary kiln kiln slag is carried out hot wafering with semi-coke and limestone
Process, the sensible heat of hot kiln slag not only can be made full use of, and the addition of semi-coke can ensure that in rotary hearth furnace to be reproducibility gas
Atmosphere, more of the prior art hot for gained kiln slag is carried out carrying out drying and processing after Water Quenching again comparing, the application not only saves
Remove the water quenching technology in original technique, and eliminated the drying cost of kiln slag after water quenching, and the addition of semi-coke can be real
Remaining zinc and the reduction of low price iron oxides and the reduction of silver and volatilization in existing kiln slag, thus improve while reducing energy consumption
The reduction efficiency of ferrum, silver, zinc and lead in secondary reduction processing procedure, in addition being added in subsequent process of limestone not only can
Play the effect of flux, and the agglomeration of iron particle in reduction process can be promoted, thus while reducing energy consumption
Ensure gained granular metal there is higher degree of metalization, and by by the hot pressing being obtained using hot pressing form pelletizing supply to
Carry out secondary reduction process in rotary hearth furnace, the utilization rate of reducing agent can be significantly improved, and can achieve through dry separation process again
Slag sluicing system.In this step, specifically, in rotary kiln, the hot kiln slag of 800 DEG C of gained is cooled to after less than 500 DEG C through air-cooled again
Carry out hot wafering with semi-coke and limestone, such that it is able to be prevented effectively from the scaling loss of semi-coke.
According to an embodiment of the present utility model, hot kiln slag is not subject to especially with the mixed proportion of semi-coke and limestone
Limit, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, hot kiln
Slag can be 100:(10～20 according to mass ratio with semi-coke and limestone): (5～25) are mixed.Thus, using this mixing
Ratio, not only can significantly improve the utilization ratio of reducing agent, and can realize remaining zinc and low price iron oxides in kiln slag
Reduction and the reduction of silver and volatilization, thus improve while reducing energy consumption ferrum in secondary reduction processing procedure, silver, zinc and
The reduction efficiency of lead, and then obtain the granular metal of higher metal rate.
S500: hot pressing pelletizing is supplied and carries out secondary reduction process to rotary hearth furnace
According to embodiment of the present utility model, hot pressing pelletizing obtained above is supplied and carries out at secondary reduction to rotary hearth furnace
Reason, obtains granular metal and the flue dust containing zinc oxide, lead oxide and silver.Inventor finds, by supplying hot pressing pelletizing
Carry out reduction treatment to rotary hearth furnace, semi-coke therein can realize in kiln slag remaining zinc and low price iron oxides reduction and
The reduction of silver and volatilization, obtain granular metal and (the wherein thing in flue dust for the silver of the flue dust containing zinc oxide, lead oxide and silver
It is mutually silver oxide, Argentous sulfide. and silver-colored simple substance), thus improving ferrum, silver, zinc in secondary reduction processing procedure while reducing energy consumption
With the reduction efficiency of lead, in addition limestone be added in the effect that not only can play flux in subsequent process, and permissible
Promote the agglomeration of iron particle in reduction process, thus it is higher to ensure that while reducing energy consumption gained granular metal has
Degree of metalization, and carry out secondary reduction process by supplying the hot pressing obtaining using hot pressing form pelletizing to rotary hearth furnace,
The utilization rate of reducing agent can be significantly improved, and process i.e. achievable slag sluicing system through dry separation again.After testing, the volatility of sulfur
Reach more than 80%, Zinc volatilization rate reaches more than 99%, lead volatility rate reaches more than 98%, and silver-colored volatility reaches more than 85%.According to this reality
With new specific embodiment, the temperature of secondary reduction processing procedure can be 1250～1400 DEG C, and the time can be 15～40
Minute.Thus, it is possible to significantly improve the reduction efficiency of secondary reduction processing procedure.
S600: granular metal is carried out dry separation process, to obtain metallic iron and tailings
According to embodiment of the present utility model, granular metal obtained above is carried out dry separation process, obtain metallic iron and
Tailings.
Specifically, by can achieve after cooled for gained granular metal, broken, dry type magnetic separation metal iron powder and mine tailing point
From.After testing, the response rate of metallic iron reaches more than 90%.
Being passed through using the method that the system of the process zinc leaching residue of this utility model embodiment implements process zinc leaching residue will
Zinc leaching residue siccative is supplied after being mixed with anthracite and carries out pre-reduction treatment to rotary kiln, and by reducing anthracitic joining
Enter amount it is ensured that preheating section is oxidizing atmosphere in rotary kiln, thus promoting the decomposition of sulfate and sulfur dioxide in zinc leaching residue
Volatilization, simultaneously ensure kiln in for pre-reduction stage be weak reducing atmosphere, thus reduce zinc sulfide generation so that zinc leaching
Most of zinc in slag and lead volatility carry out being recovered in the form of zinc oxide and lead oxide in flue, secondly by institute in rotary kiln
Obtain hot kiln slag and carry out hot wafering process with semi-coke and limestone, the sensible heat of hot kiln slag, Er Qielan not only can be made full use of
The addition of charcoal can ensure that in rotary hearth furnace to be reducing atmosphere, more of the prior art hot for gained kiln slag is carried out Water Quenching
Carry out drying and processing afterwards again to compare, the application not only eliminates the water quenching technology in original technique, and eliminates kiln after water quenching
The drying cost of slag, and the addition of semi-coke can realize in kiln slag the reduction of remaining zinc and low price iron oxides and silver also
Former and volatilization, thus while reducing energy consumption improve secondary reduction processing procedure in ferrum, the reduction efficiency of silver, zinc and lead, separately
Outer limestone be added in the effect that not only can play flux in subsequent process, and ferrum in reduction process can be promoted
The agglomeration of grain, thus ensureing that while reducing energy consumption gained granular metal has higher degree of metalization, and passes through
The hot pressing pelletizing being obtained using hot pressing form is supplied to rotary hearth furnace, carries out secondary reduction process, reducing agent can be significantly improved
Utilization rate, and again through dry separation process i.e. can achieve slag sluicing system.Thus, zinc can be realized using the system of the application to leach
The synthetical recovery of ferrum, silver, zinc and lead in slag, and the volatility of sulfur reaches more than 80%, and the response rate of ferrum reaches more than 90%, and zinc is waved
The rate of sending out reaches more than 99%, and lead volatility rate reaches more than 98%, and silver-colored volatility reaches more than 85%.
With reference to Fig. 4, the system using the process zinc leaching residue of this utility model embodiment is implemented to process the side of zinc leaching residue
Method further includes:
S700: zinc smoke and the flue dust containing zinc oxide, lead oxide and silver are carried out waste heat recovery
According to embodiment of the present utility model, s300 is obtained zinc smoke and s500 obtains containing zinc oxide, oxygen
Change lead and the flue dust of silver carries out waste heat recovery, obtain flue dust of lowering the temperature.Thus, by obtained zinc smoke and containing aerobic
The flue dust changing zinc, lead oxide and silver carries out waste heat recovery, can be used for generating electricity by this part of waste heat, and the temperature of flue dust of lowering the temperature
It is down to 400 DEG C about, thus realizing maximally utilizing of resource.
S800: cooling flue dust is carried out cooling treatment
According to embodiment of the present utility model, cooling flue dust obtained above is carried out cooling treatment, can be cooled
Flue dust.Specifically, cooling flue dust temperature after surface-cooler obtained above is down to 250 DEG C about.
S900: cooling flue dust is carried out bag collection
According to embodiment of the present utility model, cooling flue dust obtained above is carried out bag collection, such that it is able to collect
Dust.
As described above, implementing to process the side of zinc leaching residue using the system of the process zinc leaching residue of this utility model embodiment
Method can have the advantages that selected from least one following:
Be can achieve using the method that the system of the process zinc leaching residue of this utility model embodiment implements to process zinc leaching residue
The comprehensive reutilization of ferrum, silver, zinc, lead in zinc leaching residue, the response rate of achievable ferrum is more than 90%, and Zinc volatilization rate is more than
99%, lead volatility rate is more than 98%, the technical specification that silver-colored volatility is more than 85%.
Being passed through using the method that the system of the process zinc leaching residue of this utility model embodiment implements process zinc leaching residue will
The kiln slag obtaining in rotary kiln carries out hot wafering, it is possible to reduce water quenching technology in original technique, saves moisture in kiln slag and is dried into
This, make full use of kiln slag sensible heat for the reduction of rotary hearth furnace, save the energy consumption of whole technique.
The method implementing to process zinc leaching residue using the system of the process zinc leaching residue of this utility model embodiment is more existing
0.65 ton of kiln slag is produced using 1 ton of zinc leaching residue of rotary kiln evaporation PROCESS FOR TREATMENT, the big problem of secondary solid waste amount is compared, the application
By reducing rotary kiln coal amount of allocating, rotary hearth furnace volatilizees in kiln slag remaining zinc lead sulfur after reclaiming abrasive grit again, and 1 ton of cadmia is
Only produce 0.30 ton of tailings eventually, cadmia CER is greatly improved.
Pass through to subtract using the method that the system of the process zinc leaching residue of this utility model embodiment implements to process zinc leaching residue
Few rotary kiln stage anthracite amount of allocating, adds semi-coke grain it is ensured that preheating in rotary kiln and reduction section during hot wafering
Atmosphere, the volatility of sulfur can bring up to more than 80% by original 60%, decreases the generation of zinc sulfide or iron sulfide.
Implement to process the method for zinc leaching residue using heat using the system of the process zinc leaching residue of this utility model embodiment
Swaging formula reduces the utilization rate that improve carbonaceous reducing agent in rotary hearth furnace, decreases due to the carbon scaling loss causing of burning.
Below with reference to specific embodiment, this utility model is described, it should be noted that these embodiments are only
Descriptive, and limit this utility model never in any form.
Embodiment 1
Zinc leaching residue is dried to aqueous < then 10wt% is allocated into the 30% of dry slag weight anthracite, given by disk
Material machine supplies after mixing and carries out prereduction to rotary kiln, and pre-reduction temperature control, at 800～1100 DEG C, obtains zinc smoke
With hot kiln slag, in hot kiln slag, < 3wt%, the volatility of sulfur is more than Zn content in 65%, and hot kiln slag and is sulfur content
6wt%, kiln slag state is more loose, does not have harder caking, then by the 800 DEG C of hot kiln slags discharged from rotary kiln kilneye through wind
Cold be cooled to less than 500 DEG C, add 20% limestone of kiln slag weight, 10% semi-coke grain to carry out hot wafering, and will obtain
Hot pressing pelletizing is sent into high temperature rotary furnace bottom by conveyer device and is carried out secondary reduction, control temperature in rotary hearth furnace be 1250 DEG C～
1300 DEG C, the recovery time, in 30min, obtains granular metal and the flue dust containing zinc oxide, lead oxide and silver, after reduction terminates
Obtain content of Pb＆Zn < 0.1% in motlten metal agglomerate, silver content < 0.005%, and by obtained motlten metal agglomerate through cold
But, crush, obtain abrasive grit and tailings after dry type magnetic separation, iron recovery can reach more than 81%.
Embodiment 2
Zinc leaching residue is dried to aqueous < then 10wt% is allocated into the 20% of dry slag weight anthracite, given by disk
Material machine supplies after mixing and carries out prereduction to rotary kiln, and pre-reduction temperature control, at 900～1150 DEG C, obtains zinc smoke
With hot kiln slag, in hot kiln slag, < 3wt%, the volatility of sulfur is more than Zn content in 70%, and hot kiln slag and is sulfur content
7wt%, kiln slag has a small amount of caking, then by the 800 DEG C of hot kiln slags discharged from rotary kiln kilneye through air-cooled be cooled to 500 DEG C with
Under, add 20% limestone of kiln slag weight, 15% semi-coke grain to carry out hot wafering, and the hot pressing obtaining pelletizing is passed through conveying
Device is sent into high temperature rotary furnace bottom and is carried out secondary reduction, controls temperature in rotary hearth furnace to be 1350 DEG C～1400 DEG C, the recovery time
In 20min, obtain granular metal and the flue dust containing zinc oxide, lead oxide and silver, reduction obtains motlten metal group after terminating
Content of Pb＆Zn < 0.07% in block, silver content < 0.003%, and by cooled, broken for obtained motlten metal agglomerate, dry type magnetic
Abrasive grit and tailings is obtained, iron recovery can reach more than 93% after choosing.
Embodiment 3
Zinc leaching residue is dried to aqueous < then 10wt% is allocated into the 20% of dry slag weight anthracite, given by disk
Material machine supplies after mixing and carries out prereduction to rotary kiln, and pre-reduction temperature control, at 900～1150 DEG C, obtains zinc smoke
With hot kiln slag, in hot kiln slag, < 3wt%, the volatility of sulfur is more than Zn content in 70%, and hot kiln slag and is sulfur content
7wt%, kiln slag has a small amount of caking, then by the 800 DEG C of hot kiln slags discharged from rotary kiln kilneye through air-cooled be cooled to 500 DEG C with
Under, add 10% limestone of kiln slag weight, 5% semi-coke grain to carry out hot wafering, and the hot pressing obtaining pelletizing is passed through conveying
Device is sent into high temperature rotary furnace bottom and is carried out secondary reduction, controls temperature in rotary hearth furnace to be 1350 DEG C～1400 DEG C, the recovery time
In 20min, obtain granular metal and the flue dust containing zinc oxide, lead oxide and silver, reduction obtains motlten metal group after terminating
Content of Pb＆Zn < 0.3% in block, silver content < 0.009%, and by cooled, broken for obtained motlten metal agglomerate, dry type magnetic separation
After obtain abrasive grit and tailings, iron recovery can reach more than 93%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
Any one or more embodiments or example combine in an appropriate manner.Additionally, in the case of not conflicting, this area
Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered
Row combines and combines.
Although of the present utility model embodiment has been shown and described above it is to be understood that above-described embodiment is
Exemplary it is impossible to be interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model
Interior above-described embodiment can be changed, change, replacing and modification.
Claims (2)
1. a kind of system processing zinc leaching residue is it is characterised in that include:
Drying unit, described drying unit has zinc leaching residue entrance and zinc leaching residue drier outlet；
Mixing arrangement, described mixing arrangement has zinc leaching residue siccative entrance, anthracite entrance and mixed material outlet, described zinc
Leached mud siccative entrance is connected with described zinc leaching residue drier outlet；
Rotary kiln, described rotary kiln has mixed material entrance, the outlet of hot kiln slag and zinc smoke outlet, described mixed material
Entrance is connected with the outlet of described mixed material；
Hot pressing block assembly, described hot pressing block assembly has hot kiln slag entrance, semi-coke entrance, limestone entrance and hot pressing pelletizing and goes out
Mouthful, described hot kiln slag entrance is exported with described hot kiln slag and is connected；
Rotary hearth furnace, described rotary hearth furnace has hot pressing pelletizing entrance, granular metal exports and containing zinc oxide, lead oxide and silver
Flue dust exports, and described hot pressing pelletizing entrance is connected with the outlet of described hot pressing pelletizing；
Dry separation device, described dry separation device has granular metal entrance, metallic iron outlet and tailings outlet, and described granular metal enters
Mouth is connected with the outlet of described granular metal.
2. system according to claim 1 is it is characterised in that further include:
Waste-heat recovery device, described waste-heat recovery device has flue dust entrance and cooling flue dust outlet, and described flue dust entrance is respectively
It is connected with the outlet of described zinc smoke and the described outlet of the flue dust containing zinc oxide, lead oxide and silver；
Chiller, described chiller has cooling flue dust entrance and cooling flue dust outlet, described cooling flue dust entrance and institute
State cooling flue dust outlet to be connected；
Bagroom, described bagroom has cooling flue dust entrance, dust outlet and gas outlet, described cooling flue dust
Entrance is connected with described cooling flue dust outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620899824.1U CN205907324U (en) | 2016-08-18 | 2016-08-18 | System for handle zinc leaching residue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620899824.1U CN205907324U (en) | 2016-08-18 | 2016-08-18 | System for handle zinc leaching residue |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191450A (en) * | 2016-08-18 | 2016-12-07 | 江苏省冶金设计院有限公司 | Process the method and system of zinc leaching residue |
| CN114410985A (en) * | 2022-02-10 | 2022-04-29 | 兰州有色冶金设计研究院有限公司 | Zinc leaching slag treatment system and treatment method |
-
2016
- 2016-08-18 CN CN201620899824.1U patent/CN205907324U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191450A (en) * | 2016-08-18 | 2016-12-07 | 江苏省冶金设计院有限公司 | Process the method and system of zinc leaching residue |
| CN114410985A (en) * | 2022-02-10 | 2022-04-29 | 兰州有色冶金设计研究院有限公司 | Zinc leaching slag treatment system and treatment method |
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