CN106086400A - Process the method and system of lead Zn scrap returns - Google Patents
Process the method and system of lead Zn scrap returns Download PDFInfo
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- CN106086400A CN106086400A CN201610619367.0A CN201610619367A CN106086400A CN 106086400 A CN106086400 A CN 106086400A CN 201610619367 A CN201610619367 A CN 201610619367A CN 106086400 A CN106086400 A CN 106086400A
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- China
- Prior art keywords
- zinc
- kiln slag
- leaching residue
- entrance
- lead
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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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
-
- 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
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery from waste materials
-
- 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
-
- 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
- C22B58/00—Obtaining gallium or indium
-
- 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
- C22B7/04—Working-up slag
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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 invention discloses the method and system processing lead Zn scrap returns, the method includes: leaded zinc kiln slag is carried out drying and processing by (1)；(2) kiln slag is dried material and carry out levigate process；(3) zinc leaching residue is carried out drying and processing；(4) kiln slag fines, zinc leaching residue siccative, reducing agent and binding agent are mixed；(5) mixed material is carried out pelletizing process, obtain mixing pelletizing；(6) by the feed zone of mixing pelletizing supply to rotary hearth furnace, pelletizing sequentially passes through the preheating zone of rotary hearth furnace, high-temperature region is reduced to make mixing, the flue dust containing Indium sesquioxide., zinc oxide and lead oxide obtained is discharged from preheating zone, obtains metallized pellet and discharges from discharge zone；(7) metallized pellet is carried out mill ore magnetic selection process, obtain metal iron powder and mine tailing.The method can realize carbon, ferrum, lead, zinc and the comprehensive reutilization of indium in zinc leaching residue and leaded zinc kiln slag, and the volatility of lead, zinc and indium is up to more than 98%, and the response rate of ferrum is up to more than 90%.
Description
Technical field
The invention belongs to metallurgical technology field, specifically, the present invention relates to a kind of method processing lead Zn scrap returns and be
System.
Background technology
In conventional flowsheet of wet zinc smelting, in calcining, the zinc of most lead, gold, silver, indium and 15% all enters leaching
In slagging tap.Often produce one ton of electric zinc and about produce leached mud 1.05 tons.Using rotary kiln evaporation is that process zinc leaching residue is topmost
One of process, is most widely used in zinc hydrometallurgy factory of China.The productivity of kiln slag is the 64%～68% of leached mud, according to
Produce actual count, often produce lt electricity zinc about output kiln slag 0.8t.The kiln slag that current China is deposited in slag field adds up to 1000
Ten thousand more than t, not only make enterprise increase stacking expense, also pollute environment.
Kiln slag be zinc leaching residue allocate into a large amount of coke powder in rotary kiln through the high temperature reduction volatilization metal such as zinc, lead, gold, silver it
Rear water is broken and is formed.The mixed material of leached mud and coke powder is through rotary kiln high-temperature region, and slag charge is semi-molten state, thing
Having phenomenon adhered to one another between material, the ferrum oxide major part in leached mud is reduced into metallic iron.Due to the needs of Rotary Kiln technique,
Allocating substantial amounts of coal into react the most completely, therefore kiln slag carbon containing is high.Slag charge is semi-molten state, and the mutual embedding cloth of each material is tight.Burnt
The charcoal amount of allocating into is bigger than normal, has more excess carbon in kiln slag.Kiln slag directly carries out magnetic separation, owing to silver is tight at stone-like pulse middle parcel mutually
Weight so that the response rate of ferrum and silver reduces.Through magnetic separation obtain containing iron ore concentrate in iron content less than 70%, but due to silver in iron powder
Content is low, and during sale, silver metal is the most without charge, causes the waste of rare precious metal.
On the comprehensive utilization technique of kiln slag, existing technique mainly from selecting carbon and select the angle of ferrum to carry out, the ferrum obtained
Product purity relatively low generally 66%, and it also requires extract further.Possibly together with Zn, Pb etc. in the tailings produced after selecting ferrum carbon
Heavy metal, content overproof, it is still desirable to process.Zinc leaching residue is individually used to carry out reduction volatilization, owing to cadmia granularity is relatively thin, ore deposit
Thing degree of scatter is high, and the rapid aggregation needing higher reduction temperature could realize ferrum is grown up, and higher reduction temperature is easy
Cause material soft heat, cause production to have some setbacks.
Therefore, the technology of the leaded zinc kiln slag of existing process and two kinds of lead Zn scrap returns of zinc leaching residue is further improved.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention
One purpose is to propose a kind of method and system processing lead Zn scrap returns, and the method can realize zinc leaching residue and leaded zinc kiln
The comprehensive reutilization of carbon, ferrum, lead, zinc and indium in slag, and the volatility of lead, zinc and indium is up to more than 98%, the recovery of ferrum
Rate is up to more than 90%.
In one aspect of the invention, the present invention proposes a kind of method processing lead Zn scrap returns.Reality according to the present invention
Executing example, described lead Zn scrap returns is leaded zinc kiln slag and zinc leaching residue.According to one embodiment of present invention, the method includes:
(1) leaded zinc kiln slag is carried out drying and processing, in order to obtain kiln slag and dry material；
(2) described kiln slag drying material is carried out levigate process, in order to obtain kiln slag fines；
(3) described zinc leaching residue is carried out drying and processing, in order to obtain zinc leaching residue siccative；
(4) described kiln slag fines, zinc leaching residue siccative, reducing agent and binding agent are mixed, in order to obtain mixture
Material；
(5) described mixed material is carried out pelletizing process, in order to obtain mixing pelletizing；
(6) by the feed zone of described mixing pelletizing supply to rotary hearth furnace so that described mixing pelletizing sequentially passes through described turning
The preheating zone of end stove, high-temperature region are reduced, and the flue dust containing Indium sesquioxide., zinc oxide and lead oxide obtained is arranged from preheating zone
Go out, obtain metallized pellet and discharge from discharge zone；
(7) described metallized pellet is carried out mill ore magnetic selection process, in order to obtain metal iron powder and mine tailing.
Thus, the method processing lead Zn scrap returns according to embodiments of the present invention is by leaching leaded zinc kiln slag fines with zinc
Supply to rotary hearth furnace after slag siccative mixed pelletizing and carry out reduction treatment, utilize the excess carbon part contained in kiln slag to substitute reduction
Agent iron oxides and reduction of lead zinc compound in zinc leaching residue and kiln slag, it is possible to achieve zinc leaching residue and leaded zinc kiln slag
The comprehensive reutilization of middle carbon, ferrum, lead, zinc and indium, thus be possible not only to realize leaded zinc kiln slag and two kinds of lead zinc of zinc leaching residue
The recycling of waste material, and kiln slag bulk deposition in prior art can be solved and take up an area and pollute a difficult problem for environment, and
During can significantly reducing reducing process, the outer of reducing agent is joined, thus reduces processing cost, simultaneously by kiln slag is levigate, and can
So that the metallic iron phase in kiln slag is the most fully dissociated with fayalite, thus can be as in zinc leaching residue in reduction process
The nucleating agent of the new pig iron phase that iron compound reduction obtains, such that it is able to make the ferrum granule generated gather rapidly under cryogenic
Collection is grown up, and then not only reduces reduction temperature, and can reduce the hop count of follow-up mill ore magnetic selection, improves Iron grade and recovery
Rate, additionally uses the method to process zinc leaching residue and leaded zinc kiln slag two kinds containing scrap lead, it is possible to achieve lead, zinc and indium
Volatility reach more than 98%, the response rate of ferrum reaches more than 90%.
It addition, the method for process lead Zn scrap returns according to the above embodiment of the present invention can also have following additional technology
Feature:
In some embodiments of the invention, in step (1), described kiln slag is dried water content in material and is not higher than 6wt%.
Thus, it is possible to the reduction efficiency significantly improved in rotary hearth furnace.
In some embodiments of the invention, in step (2), the particle diameter of described kiln slag fines is 20～100 microns, excellent
Select 30～70 microns.Thus, by kiln slag is levigate, so that the metallic iron phase in kiln slag the most fully solves with fayalite
From, thus the nucleating agent of the new pig iron phase that can obtain as iron compound reduction in zinc leaching residue in reduction process, thus
The rapid agglomeration of ferrum granule generated can be made under cryogenic, and then not only reduce reduction temperature, and can drop
The hop count of low follow-up mill ore magnetic selection, improves Iron grade and the response rate
In some embodiments of the invention, it is characterised in that in step (3), described zinc leaching residue siccative is aqueous
Amount not higher than 6wt%.Thus, it is possible to improve the reduction efficiency in rotary hearth furnace further.
In some embodiments of the invention, in step (4), by described kiln slag fines, described zinc leaching residue siccative, institute
Stating reducing agent and described binding agent according to mass ratio is 100:(20～80): (0～15): (2～5) mix.Thus, it is possible to
The reduction volatilization of the volatile matters such as lead zinc indium is improved while the reduction ensureing ferrum and agglomeration.
In some embodiments of the invention, in step (6), the temperature of described high-temperature region is 1100～1300 Celsius
Degree, preferably 1200～1300 degrees Celsius.Thus, it is possible to significantly improve volatility and the response rate of ferrum of lead zinc indium.
In some embodiments of the invention, in step (6), the air-fuel ratio of described high-temperature region is 5～8.Thus, it is possible to
Improve volatility and the response rate of ferrum of lead zinc indium further.
In some embodiments of the invention, the method for described process lead Zn scrap returns farther includes: (8) are contained described
The flue dust of Indium sesquioxide., zinc oxide and lead oxide is collected through bagroom.
In another aspect of the invention, what the present invention proposed a kind of method implementing above-mentioned process lead Zn scrap returns is
System.According to embodiments of the invention, this system includes:
Kiln slag drying unit, described kiln slag drying unit has leaded zinc kiln slag entrance and kiln slag dries drier outlet；
Fine mill, described fine mill has kiln slag dries material entrance and the outlet of kiln slag fines, and described kiln slag dries material
Entrance dries drier outlet with described kiln slag and is connected；
Zinc leaching residue drying unit, described zinc leaching residue drying unit has zinc leaching residue entrance and zinc leaching residue siccative goes out
Mouthful；
Mixing arrangement, described mixing arrangement has kiln slag fines entrance, zinc leaching residue siccative entrance, reducing agent entrance, glues
Knot agent entrance and mixed material outlet, described kiln slag fines entrance is connected with the outlet of described kiln slag fines, and described zinc leaching residue is done
Material entrance is connected with described zinc leaching residue drier outlet；
Palletizing device, described palletizing device has mixed material entrance and mixing pelletizing outlet, described mixed material entrance
It is connected with the outlet of described mixed material；
Rotary hearth furnace, sequentially forms feed zone, preheating zone, high-temperature region and discharging along furnace bottom rotation direction in described rotary hearth furnace
District, described feed zone is provided with mixing pelletizing entrance, and described preheating zone is provided with flue dust outlet, and described discharge zone is provided with metal
Pellet exports, and described mixing pelletizing entrance is connected with the outlet of described mixing pelletizing；
Mill ore magnetic selection device, described mill ore magnetic selection device has metallized pellet entrance, metal iron powder outlet and mine tailing and goes out
Mouthful, described metallized pellet entrance is connected with the outlet of described metallized pellet.
Thus, the system processing lead Zn scrap returns according to embodiments of the present invention is by leaching leaded zinc kiln slag fines with zinc
Supply to rotary hearth furnace after slag siccative mixed pelletizing and carry out reduction treatment, utilize the excess carbon part contained in kiln slag to substitute reduction
Agent iron oxides and reduction of lead zinc compound in zinc leaching residue and kiln slag, it is possible to achieve zinc leaching residue and leaded zinc kiln slag
The comprehensive reutilization of middle carbon, ferrum, lead, zinc and indium, thus be possible not only to realize leaded zinc kiln slag and two kinds of lead zinc of zinc leaching residue
The recycling of waste material, and kiln slag bulk deposition in prior art can be solved and take up an area and pollute a difficult problem for environment, and
During can significantly reducing reducing process, the outer of reducing agent is joined, thus reduces processing cost, simultaneously by kiln slag is levigate, and can
So that the metallic iron phase in kiln slag is the most fully dissociated with fayalite, thus can be as in zinc leaching residue in reduction process
The nucleating agent of the new pig iron phase that iron compound reduction obtains, such that it is able to make the ferrum granule generated gather rapidly under cryogenic
Collection is grown up, and then not only reduces reduction temperature, and can reduce the hop count of follow-up mill ore magnetic selection, improves Iron grade and recovery
Rate, additionally uses the method to process zinc leaching residue and leaded zinc kiln slag two kinds containing scrap lead, it is possible to achieve lead, zinc and indium
Volatility reach more than 98%, the response rate of ferrum reaches more than 90%.
In some embodiments of the invention, the system of described process lead Zn scrap returns farther includes: bagroom, institute
Stating bagroom and have flue dust entrance, dust outlet and gas outlet, described flue dust entrance is connected with the outlet of described flue dust.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is the method flow schematic diagram processing lead Zn scrap returns according to an embodiment of the invention；
Fig. 2 is the method flow schematic diagram processing lead Zn scrap returns according to further embodiment of the present invention；
Fig. 3 is the system structure schematic diagram processing lead Zn scrap returns according to an embodiment of the invention；
Fig. 4 is that the plan structure according to the rotary hearth furnace in the system processing lead Zn scrap returns of further embodiment of the present invention is shown
It is intended to；
Fig. 5 is the system structure schematic diagram processing lead Zn scrap returns according to further embodiment of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In one aspect of the invention, the present invention proposes a kind of method processing lead Zn scrap returns.Reality according to the present invention
Executing example, described lead Zn scrap returns is leaded zinc kiln slag and zinc leaching residue.According to one embodiment of present invention, the method includes: (1)
Leaded zinc kiln slag is carried out drying and processing, obtains kiln slag and dry material；(2) described kiln slag drying material is carried out levigate process, in order to
Obtain kiln slag fines；(3) described zinc leaching residue is carried out drying and processing, in order to obtain zinc leaching residue siccative；(4) by described kiln slag
Fines, zinc leaching residue siccative, reducing agent and binding agent mix, in order to obtain mixed material；(5) described mixed material is entered
Row pelletizing processes, in order to obtain mixing pelletizing；(6) by the feed zone of described mixing pelletizing supply to rotary hearth furnace so that described mixed
Close pelletizing sequentially passes through the preheating zone of described rotary hearth furnace, high-temperature region is reduced, obtain containing Indium sesquioxide., zinc oxide and oxidation
The flue dust of lead is discharged from preheating zone, obtains metallized pellet and discharges from discharge zone；(7) described metallized pellet is carried out ore grinding magnetic
Choosing processes, in order to obtain metal iron powder and mine tailing.Inventor finds, by being mixed with zinc leaching residue siccative by leaded zinc kiln slag fines
Supply to rotary hearth furnace after closing pelletizing and carry out reduction treatment, utilize the excess carbon part contained in kiln slag to substitute reducing agent for zinc
Iron oxides and the reduction of lead zinc compound in leached mud and kiln slag, it is possible to achieve carbon in zinc leaching residue and leaded zinc kiln slag, ferrum,
The comprehensive reutilization of lead, zinc and indium, thus be possible not only to realize leaded zinc kiln slag and the money of two kinds of lead Zn scrap returns of zinc leaching residue
Sourceization utilizes, and can solve kiln slag bulk deposition in prior art and take up an area and pollute a difficult problem for environment, and can be notable
During reducing reducing process, the outer of reducing agent is joined, thus reduces processing cost, simultaneously by kiln slag is levigate, so that kiln
Metallic iron phase in slag is the most fully dissociated with fayalite, thus can be as iron compound in zinc leaching residue in reduction process
The nucleating agent of the new pig iron phase that reduction obtains, such that it is able to make the rapid agglomeration of ferrum granule generated under cryogenic,
And then not only reduce reduction temperature, and the hop count of follow-up mill ore magnetic selection can be reduced, improve Iron grade and the response rate, additionally adopt
By the method, zinc leaching residue and leaded zinc kiln slag two kinds are processed containing scrap lead, it is possible to achieve the volatility of lead, zinc and indium
Reaching more than 98%, the response rate of ferrum reaches more than 90%.
The method that the embodiment of the present invention processes lead Zn scrap returns below with reference to Fig. 1 and 2 is described in detail.According to this
Bright embodiment, the method includes:
S100: leaded zinc kiln slag is carried out drying and processing
According to embodiments of the invention, leaded zinc kiln slag is carried out drying and processing, obtain kiln slag and dry material.Thus, it is possible to
Significantly improve volatilization efficiency and the organic efficiency of ferrum of sequential reduction stage lead zinc indium.Concrete, leaded zinc kiln slag comes from
Zinc leaching residue allocates the waste residue that a large amount of coke powder obtains through shrend in rotary kiln after the metals such as vaporization at high temperature zinc lead gold silver again, zinc into
The mixed material of leached mud and coke powder is through rotary kiln high-temperature region, and slag charge is semi-molten state, and storeroom has adhered to one another
Phenomenon, the ferrum oxide major part in leached mud is reduced into metallic iron, due to the needs of Rotary Kiln technique, allocates substantial amounts of coal into not
Reacting completely, therefore kiln slag carbon containing is high, and slag charge is semi-molten state simultaneously, and the mutual embedding cloth of each material is tight, and in this step,
Gained kiln slag is dried water content in material and is not higher than 6wt%.
S200: kiln slag is dried material and carries out levigate process
According to embodiments of the invention, above-mentioned gained kiln slag drying material is carried out levigate process, obtains kiln slag fines.Specifically
, the particle diameter of gained kiln slag fines can be 20～100 microns, preferably 30～70 microns.Inventor finds, by being ground by kiln slag
Thin to this particle size range, so that the metallic iron phase in kiln slag is the most fully dissociated with fayalite, thus in reduction process
The nucleating agent of the new pig iron phase that can obtain as iron compound reduction in zinc leaching residue, such that it is able to make under cryogenic
The rapid agglomeration of ferrum granule generated, and then not only reduce reduction temperature, and the hop count of follow-up mill ore magnetic selection can be reduced,
Improve Iron grade and the response rate.
S300: zinc leaching residue is carried out drying and processing
According to embodiments of the invention, zinc leaching residue is carried out drying and processing, obtain zinc leaching residue siccative.Concrete, zinc
Leached mud is the leached mud using conventional wet lay zinc metallurgy flow process to obtain, and in this step, aqueous in gained zinc leaching residue siccative
Amount not higher than 6wt%.Thus, it is possible to improve the volatilization efficiency of sequential reduction stage lead zinc indium and the recovery effect of ferrum further
Rate.
S400: kiln slag fines, zinc leaching residue siccative, reducing agent and binding agent are mixed
According to embodiments of the invention, by above-mentioned obtained kiln slag fines, zinc leaching residue siccative and reducing agent and bonding
Agent mixes, and obtains mixed material.Inventor finds, by by leaded zinc kiln slag fines and zinc leaching residue siccative mixed pelletizing
Rear supply carries out reduction treatment to rotary hearth furnace, utilizes the excess carbon part contained in kiln slag to substitute reducing agent for zinc leaching residue
With iron oxides in kiln slag and the reduction of lead zinc compound, it is possible to achieve carbon, ferrum, lead, zinc in zinc leaching residue and leaded zinc kiln slag
With the comprehensive reutilization of indium, thus it is possible not only to realize the resource profit of leaded zinc kiln slag and two kinds of lead Zn scrap returns of zinc leaching residue
With, and kiln slag bulk deposition in prior art can be solved and take up an area and pollute a difficult problem for environment, and can significantly reduce also
In former technical process, the outer of reducing agent is joined, thus reduces processing cost.Those skilled in the art can be according to actual needs to also
Former dose selects with the particular type of binding agent, and such as reducing agent can be carbonaceous reducing agent etc., and binding agent can be swelling
Soil etc..
According to one embodiment of present invention, kiln slag fines, zinc leaching residue siccative, reducing agent and the mixed proportion of binding agent
Being not particularly restricted, those skilled in the art can select according to actual needs, according to a particular embodiment of the invention,
Kiln slag fines, zinc leaching residue siccative, reducing agent and binding agent can be 100:(20～80 according to mass ratio): (0～15): (2～
5) mix.Inventor finds, if zinc leaching residue siccative ratio is too low, is unfavorable for making full use of in kiln slag surplus carbon, causes C's
The wasting of resources, and if be shown experimentally that when the ratio of zinc leaching residue siccative is less than 20 parts, C in the metallized pellet after reduction
Content still will be above 8%, and if zinc leaching residue siccative is too high, in mixing pelletizing, the percentage of C is too low, less than 10%, unfavorable
In the reduction reaction of mixing pelletizing, the metallic iron ratio additionally playing nucleating agent effect in kiln slag is less than 6%, does not has promotion crystalline substance
The effect that grain length is big, and binding agent addition is too low, balling-up is poor, and if binding agent addition is too high, increase cost.According to
One concrete example of the present invention, is in terms of 100 parts by kiln slag, and cadmia ratio is 20～80 parts, preferably zinc leaching residue siccative ratio
It is 40～60%.
S500: mixed material is carried out pelletizing process
According to embodiments of the invention, the mixed material obtained by above-mentioned is carried out pelletizing process, obtain mixing pelletizing.Tool
Body, can use roll-in ball mechanism standby mixing pelletizing.
S600: by the feed zone of mixing pelletizing supply to rotary hearth furnace so that mixing pelletizing sequentially passes through the preheating of rotary hearth furnace
District, high-temperature region are reduced, and the flue dust containing Indium sesquioxide., zinc oxide and lead oxide obtained is discharged from preheating zone, obtains metal
Pellet is discharged from discharge zone
In this step, concrete, by the feed zone of mixing pelletizing obtained above supply to rotary hearth furnace, along with turning of furnace bottom
Dynamic, pelletizing sequentially passes through the preheating zone of rotary hearth furnace, high-temperature region is reduced in mixing, the Fe in mixing pelletizing3O4、PbS、ZnO、
ZnS、In2O3Utilize the C in kiln slag and join outward reducing agent and fully reduce, obtain containing Indium sesquioxide., zinc oxide and lead oxide
Flue dust from preheating zone discharge, simultaneously the metallic iron in kiln slag mutually can as in zinc leaching residue iron compound reduction obtain new
The nucleating agent of pig iron phase, such that it is able to make the rapid agglomeration of ferrum granule generated under cryogenic, obtains the ball that metallizes
Group, and the metallized pellet obtained is from discharge zone discharge, and after testing, in pelletizing, the volatility of zinc lead indium reaches more than 98%.
According to one embodiment of present invention, the temperature of high-temperature region is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to a particular embodiment of the invention, the temperature of high-temperature region can be 1100～1300 Celsius
Degree, preferably 1200～1300 degrees Celsius.Thus, it is possible to improve volatility and the response rate of ferrum of lead zinc indium further.
According to still a further embodiment, the air-fuel ratio of high-temperature region is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, the air-fuel ratio of high-temperature region can be 5～8.Invention
People finds, air-fuel ratio is too high, is unfavorable for maintaining strong reducing property atmosphere in high-temperature region, and air-fuel ratio is too low, and high-temperature region furnace temperature can not be protected
Card, Fuel Consumption is too high simultaneously.
S700: metallized pellet is carried out mill ore magnetic selection process
In this step, concrete, carry out ore grinding after metallized pellet obtained above is crushed to below 2mm after cooling
Magnetic separation, such that it is able to isolated metal iron powder and mine tailing, and by detection, the response rate of ferrum reaches more than 90%.
The method processing lead Zn scrap returns according to embodiments of the present invention is by doing leaded zinc kiln slag fines with zinc leaching residue
Supply to rotary hearth furnace after material mixed pelletizing and carry out reduction treatment, utilize the excess carbon part contained in kiln slag to substitute reducing agent and use
Iron oxides and the reduction of lead zinc compound in zinc leaching residue and kiln slag, it is possible to achieve in zinc leaching residue and leaded zinc kiln slag
The comprehensive reutilization of carbon, ferrum, lead, zinc and indium, thus it is possible not only to realize leaded zinc kiln slag and two kinds of lead zinc of zinc leaching residue give up
The recycling of material, and kiln slag bulk deposition in prior art can be solved and take up an area and pollute a difficult problem for environment, and can
Join with the outer of reducing agent during significantly reducing reducing process, thus reduce processing cost, simultaneously by kiln slag is levigate, permissible
Metallic iron phase in kiln slag is the most fully dissociated with fayalite, thus can be as ferrum in zinc leaching residue in reduction process
The nucleating agent of the new pig iron phase that compound reduction obtains, such that it is able to make the ferrum granule generated assemble rapidly under cryogenic
Grow up, and then not only reduce reduction temperature, and the hop count of follow-up mill ore magnetic selection can be reduced, improve Iron grade and the response rate,
Additionally use the method that zinc leaching residue and leaded zinc kiln slag two kinds are processed containing scrap lead, it is possible to achieve lead, zinc and indium
Volatility reaches more than 98%, and the response rate of ferrum reaches more than 90%.
With reference to Fig. 2, the method processing lead Zn scrap returns according to embodiments of the present invention farther includes:
S800: the flue dust containing Indium sesquioxide., zinc oxide and lead oxide is collected through bagroom
In this step, concrete, use bagroom in rotary hearth furnace discharge containing Indium sesquioxide., zinc oxide and oxidation
The flue dust of lead gathers dust, thus reclaims Indium sesquioxide., zinc oxide and lead oxide.
As it has been described above, the method processing lead Zn scrap returns according to embodiments of the present invention can have selected from following advantage extremely
One of few:
The method processing lead Zn scrap returns according to embodiments of the present invention may utilize excess carbon Substitute For Partial reducing agent in kiln slag,
For iron oxides and the reduction of lead zinc compound, reduce the reducing agent that technique China and foreign countries join, and the benefit of the application reducing agent
Charge is 0～15 part, far below the reducing agent amount of allocating into of existing technique.
The method processing lead Zn scrap returns according to embodiments of the present invention, makes levigate for kiln slag in kiln slag to 20～100 microns
Metallic iron phase, fayalite the most fully dissociate, the forming core of the new pig iron phase that can obtain as iron compound reduction in zinc turnover slag
Agent, can make the rapid agglomeration of ferrum granule (such as 1150 DEG C) under cryogenic, reduces follow-up mill ore magnetic selection hop count, improves ferrum product
Position and the response rate.
The method processing lead Zn scrap returns according to embodiments of the present invention may utilize the composition of the kiln slag of low valuable metal content
Characteristic, it is achieved processing the synthetical recovery of the zinc leaching residue of high tenor, kiln slag and zinc leaching residue belong to the leaded of zinc factory
Zn scrap returns, can realize the treatment of wastes with processes of wastes against one another, synthetical recovery by this technique.
In another aspect of the invention, what the present invention proposed a kind of method implementing above-mentioned process lead Zn scrap returns is
System.According to embodiments of the invention, with reference to Fig. 3 and 4, this system includes: kiln slag drying unit 100, fine mill 200, zinc soak
Slag tap drying unit 300, mixing arrangement 400, palletizing device 500, rotary hearth furnace 600 and mill ore magnetic selection device 700.
According to embodiments of the invention, kiln slag drying unit 100 has leaded zinc kiln slag entrance 101 and kiln slag is dried and expected
Mouth 102, and be suitable to leaded zinc kiln slag is carried out drying and processing, obtain kiln slag and dry material.Thus, it is possible to significantly improve sequential reduction
The volatilization efficiency of stage lead zinc indium and the organic efficiency of ferrum.Concrete, leaded zinc kiln slag comes from zinc leaching residue and allocates in a large number
The waste residue that coke powder obtains through shrend in rotary kiln after the metals such as vaporization at high temperature zinc lead gold silver again, zinc leaching residue is mixed with coke powder
Compound material is through rotary kiln high-temperature region, and slag charge is semi-molten state, and storeroom has phenomenon adhered to one another, the oxygen in leached mud
Change ferrum major part and be reduced into metallic iron, due to the needs of Rotary Kiln technique, allocate substantial amounts of coal into and react the most completely, therefore kiln slag
Carbon containing is high, and slag charge is semi-molten state simultaneously, and the mutual embedding cloth of each material is tight, and in this step, gained kiln slag is dried in material
Water content is not higher than 6wt%.
According to embodiments of the invention, fine mill 200 has kiln slag dries material entrance 201 and kiln slag fines outlet 202,
Kiln slag is dried material entrance 201 and is connected with kiln slag baking drier outlet 102, and is suitable to above-mentioned gained kiln slag drying material is carried out levigate place
Reason, obtains kiln slag fines.Concrete, the particle diameter of gained kiln slag fines can be 20～100 microns, preferably 30～70 microns.Send out
A person of good sense find, by by levigate for kiln slag to this particle size range so that the metallic iron phase in kiln slag is mutually abundant with fayalite
Dissociate, thus the nucleating agent of the new pig iron phase that can obtain as iron compound reduction in zinc leaching residue in reduction process, from
And the rapid agglomeration of ferrum granule generated can be made under cryogenic, and then not only reduce reduction temperature, and also permissible
Reduce the hop count of follow-up mill ore magnetic selection, improve Iron grade and the response rate.
According to embodiments of the invention, zinc leaching residue drying unit 300 has zinc leaching residue entrance 301 and zinc leaching residue is done
Material outlet 302, and be suitable to zinc leaching residue is carried out drying and processing, obtain zinc leaching residue siccative.Concrete, zinc leaching residue is for using
The leached mud that conventional wet lay zinc metallurgy flow process obtains, and in this step, in gained zinc leaching residue siccative, water content is not higher than
6wt%.Thus, it is possible to improve volatilization efficiency and the organic efficiency of ferrum of sequential reduction stage lead zinc indium further.
According to embodiments of the invention, mixing arrangement 400 has kiln slag fines entrance 401, zinc leaching residue siccative entrance
402, reducing agent entrance 403, binding agent entrance 404 and mixed material outlet 405, kiln slag fines entrance 401 goes out with kiln slag fines
Mouth 202 is connected, and zinc leaching residue siccative entrance 402 is connected with zinc leaching residue drier outlet 302, and is suitable to above-mentioned obtained kiln
Slag fines, zinc leaching residue siccative mix with reducing agent and binding agent, obtain mixed material.Inventor finds, by containing
Supply to rotary hearth furnace after lead zinc kiln slag fines and zinc leaching residue siccative mixed pelletizing and carry out reduction treatment, utilize in kiln slag and contain
Excess carbon part substitute reducing agent iron oxides and reduction of lead zinc compound in zinc leaching residue and kiln slag, it is possible to achieve
Carbon, ferrum, lead, zinc and the comprehensive reutilization of indium in zinc leaching residue and leaded zinc kiln slag, thus be possible not only to realize leaded zinc kiln
Slag and the recycling of two kinds of lead Zn scrap returns of zinc leaching residue, and can solve in prior art kiln slag bulk deposition take up an area and
Pollute a difficult problem for environment, and the outer of reducing agent is joined during can significantly reducing reducing process, thus reduce processing cost.This
The particular type of reducing agent and binding agent can be selected by skilled person according to actual needs, and such as reducing agent is permissible
For carbonaceous reducing agent etc., binding agent can be bentonite etc..
According to one embodiment of present invention, kiln slag fines, zinc leaching residue siccative, reducing agent and the mixed proportion of binding agent
Being not particularly restricted, those skilled in the art can select according to actual needs, according to a particular embodiment of the invention,
Kiln slag fines, zinc leaching residue siccative, reducing agent and binding agent can be 100:(20～80 according to mass ratio): (0～15): (2～
5) mix.Inventor finds, if zinc leaching residue siccative ratio is too low, is unfavorable for making full use of in kiln slag surplus carbon, causes C's
The wasting of resources, and if be shown experimentally that when the ratio of zinc leaching residue siccative is less than 20 parts, C in the metallized pellet after reduction
Content still will be above 8%, and if zinc leaching residue siccative is too high, in mixing pelletizing, the percentage of C is too low, less than 10%, unfavorable
In the reduction reaction of mixing pelletizing, the metallic iron ratio additionally playing nucleating agent effect in kiln slag is less than 6%, does not has promotion crystalline substance
The effect that grain length is big, and binding agent addition is too low, balling-up is poor, and if binding agent addition is too high, increase cost.According to
One concrete example of the present invention, is in terms of 100 parts by kiln slag, and cadmia ratio is 20～80 parts, preferably zinc leaching residue siccative ratio
It is 40～60%.
According to embodiments of the invention, palletizing device 500 has mixed material entrance 501 and mixing pelletizing outlet 502, mixed
Close material inlet 501 to be connected with mixed material outlet 405, and be suitable to above-mentioned obtained mixed material is carried out pelletizing process,
Obtain mixing pelletizing.Concrete, palletizing device can be to roller ball press.
According to embodiments of the invention, with reference to Fig. 3 and 4, in rotary hearth furnace 600, sequentially form charging along furnace bottom rotation direction
District 61, preheating zone 62, high-temperature region 63 and discharge zone 64, feed zone 61 is provided with mixing pelletizing entrance 601, and preheating zone 62 is provided with
Flue dust outlet 602, discharge zone 64 is provided with metallized pellet outlet 603, mixing pelletizing entrance 601 and mixing pelletizing outlet 405
Being connected, and be suitable to the feed zone of mixing pelletizing obtained above supply to rotary hearth furnace, along with the rotation of furnace bottom, mixing pelletizing depends on
The secondary preheating zone through rotary hearth furnace, high-temperature region are reduced, the Fe in mixing pelletizing3O4、PbS、ZnO、ZnS、In2O3Utilize kiln
C in slag and join outward reducing agent and fully reduce, the flue dust containing Indium sesquioxide., zinc oxide and lead oxide obtained is from preheating zone
Discharge, simultaneously the forming core of the new pig iron phase that the metallic iron in kiln slag can obtain as iron compound reduction in zinc leaching residue mutually
Agent, such that it is able to make the rapid agglomeration of ferrum granule generated under cryogenic, obtains metallized pellet, and obtain
Metallized pellet is discharged from discharge zone, and after testing, in pelletizing, the volatility of zinc lead indium reaches more than 98%.
According to one embodiment of present invention, the temperature of high-temperature region is not particularly restricted, and those skilled in the art are permissible
Selecting according to actual needs, according to a particular embodiment of the invention, the temperature of high-temperature region can be 1100～1300 Celsius
Degree, preferably 1200～1300 degrees Celsius.Thus, it is possible to improve volatility and the response rate of ferrum of lead zinc indium further.
According to still a further embodiment, the air-fuel ratio of high-temperature region is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, the air-fuel ratio of high-temperature region can be 5～8.Invention
People finds, air-fuel ratio is too high, is unfavorable for maintaining strong reducing property atmosphere in high-temperature region, and air-fuel ratio is too low, and high-temperature region furnace temperature can not be protected
Card, Fuel Consumption is too high simultaneously.
According to embodiments of the invention, mill ore magnetic selection device 700 has metallized pellet entrance 701, metal iron powder outlet
702 and mine tailing outlet 703, metallized pellet entrance 701 and metallized pellet outlet 603 is connected, and is suitable to obtained above
Metallized pellet carries out mill ore magnetic selection after being crushed to below 2mm after cooling, such that it is able to isolated metal iron powder and mine tailing,
And by detection, the response rate of ferrum reaches more than 90%.
The system processing lead Zn scrap returns according to embodiments of the present invention is by doing leaded zinc kiln slag fines with zinc leaching residue
Supply to rotary hearth furnace after material mixed pelletizing and carry out reduction treatment, utilize the excess carbon part contained in kiln slag to substitute reducing agent and use
Iron oxides and the reduction of lead zinc compound in zinc leaching residue and kiln slag, it is possible to achieve in zinc leaching residue and leaded zinc kiln slag
The comprehensive reutilization of carbon, ferrum, lead, zinc and indium, thus it is possible not only to realize leaded zinc kiln slag and two kinds of lead zinc of zinc leaching residue give up
The recycling of material, and kiln slag bulk deposition in prior art can be solved and take up an area and pollute a difficult problem for environment, and can
Join with the outer of reducing agent during significantly reducing reducing process, thus reduce processing cost, simultaneously by kiln slag is levigate, permissible
Metallic iron phase in kiln slag is the most fully dissociated with fayalite, thus can be as ferrum in zinc leaching residue in reduction process
The nucleating agent of the new pig iron phase that compound reduction obtains, such that it is able to make the ferrum granule generated assemble rapidly under cryogenic
Grow up, and then not only reduce reduction temperature, and the hop count of follow-up mill ore magnetic selection can be reduced, improve Iron grade and the response rate,
Additionally use the method that zinc leaching residue and leaded zinc kiln slag two kinds are processed containing scrap lead, it is possible to achieve lead, zinc and indium
Volatility reaches more than 98%, and the response rate of ferrum reaches more than 90%.
With reference to Fig. 5, the system processing lead Zn scrap returns according to embodiments of the present invention farther includes: bagroom 800.
According to embodiments of the invention, bagroom 800 has flue dust entrance 801, dust outlet 802 and gas outlet
803, flue dust entrance 801 and flue dust outlet 602 is connected, and is suitable for use with bagroom discharge in rotary hearth furnace is contained oxidation
The flue dust of indium, zinc oxide and lead oxide gathers dust, thus reclaims Indium sesquioxide., zinc oxide and lead oxide.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, and limit the present invention never in any form.
Embodiment 1
In leaded zinc kiln slag iron content be 28wt%, MFe content be 12wt%, C content is that 15wt%, Zn content is
1.5wt%；In zinc leaching residue, Zn content is 16wt%, and iron content is 22wt%, In～300g/t.Kiln slag is dried to water content
Not superelevation 4wt%, then dries gained kiln slag material pulverizing and jevigating and accounts for 95% to particle diameter 30 μm, dry zinc leaching residue to aqueous
Gained kiln slag fines and zinc leaching residue siccative, less than 5wt%, are mixed, wherein, with kiln slag fines for 100 by amount with bentonite
Part meter, is mixed into 42 parts of zinc leaching residue siccatives, adds 3 parts of bentonite, carries out mixing levigate moistening in mill equipment, is then mixed by gained
Compound material adjusts moisture and sends into roller ball press, obtains mixing pelletizing, and < pelletizing drying to moisture is sent into after 2% rotary hearth furnace
Reducing, the temperature of high-temperature region is 1150 DEG C, and the recovery time is 70min, obtain containing Indium sesquioxide., zinc oxide and lead oxide
Flue dust from preheating zone discharge, obtain metallized pellet from discharge zone discharge, gained metallized pellet is after two stage grinding magnetic separation
The available iron content metal iron powder more than 89%, iron recovery is 82%, and Zinc volatilization rate is 93%, and lead volatility rate is 92%,
Indium volatility is 93%.
Embodiment 2
In leaded zinc kiln slag iron content be 28wt%, MFe content be 12wt%, C content is that 15wt%, Zn content is
1.5wt%；In zinc leaching residue, Zn content is 16wt%, and iron content is 22wt%, In～300g/t.Kiln slag is dried to water content
Not superelevation 5wt%, then dries gained kiln slag material pulverizing and jevigating and accounts for 95% to particle diameter 30 μm, dry zinc leaching residue to aqueous
Gained kiln slag fines and zinc leaching residue siccative, less than 5wt%, are mixed by amount with anthracite, bentonite, wherein, thin with kiln slag
Material is 100 parts of meters, is mixed into 42 parts of zinc leaching residue siccatives, adds 6 parts of reducing agents, adds 3 parts of bentonite, carries out in profit mill equipment
Mix levigate, then gained mixed material is adjusted moisture and send into roller ball press, obtain mixing pelletizing, and pelletizing is dried extremely
< sending into rotary hearth furnace after 2% to reduce, the temperature of high-temperature region is 1150 DEG C to moisture, and the recovery time is 70min, and obtain contains
The flue dust of Indium sesquioxide., zinc oxide and lead oxide is discharged from preheating zone, obtains metallized pellet and discharges from discharge zone, and gained metallizes
Pelletizing is the available iron content metal iron powder more than 89% after two stage grinding magnetic separation, and iron recovery is 83%, and Zinc volatilization rate is
94%, lead volatility rate is 95%, and indium volatility is 95%.
Embodiment 3
In leaded zinc kiln slag iron content be 28wt%, MFe content be 12wt%, C content is that 15wt%, Zn content is
1.5wt%；In zinc leaching residue, Zn content is 16wt%, and iron content is 22wt%, In～300g/t.Kiln slag is dried to water content
Not superelevation 3wt%, then dries gained kiln slag material pulverizing and jevigating and accounts for 95% to particle diameter 30 μm, dry zinc leaching residue to aqueous
Gained kiln slag fines and zinc leaching residue siccative, less than 3wt%, are mixed, wherein, with kiln slag fines for 100 by amount with bentonite
Part meter, is mixed into 25 parts of zinc leaching residue siccatives, adds 3 parts of bentonite, carries out mixing levigate moistening in mill equipment, is then mixed by gained
Compound material adjusts moisture and sends into roller ball press, obtains mixing pelletizing, and < pelletizing drying to moisture is sent into after 2% rotary hearth furnace
Reducing, the temperature of high-temperature region is 1250 DEG C, and the recovery time is 40min, obtain containing Indium sesquioxide., zinc oxide and lead oxide
Flue dust from preheating zone discharge, obtain metallized pellet from discharge zone discharge, gained metallized pellet is after two stage grinding magnetic separation
The available iron content metal iron powder more than 90%, iron recovery is 87%, and Zinc volatilization rate is 96%, and lead volatility rate is 97%,
Indium volatility is 97%.
Embodiment 4
In leaded zinc kiln slag iron content be 28wt%, MFe content be 12wt%, C content is that 15wt%, Zn content is
1.5wt%；In zinc leaching residue, Zn content is 16wt%, and iron content is 22wt%, In～300g/t.Kiln slag is dried to water content
Not superelevation 4wt%, then dries gained kiln slag material pulverizing and jevigating and accounts for 95% to particle diameter 60 μm, dry zinc leaching residue to aqueous
Gained kiln slag fines and zinc leaching residue siccative, less than 3wt%, are mixed, wherein, with kiln slag by amount with anthracite and bentonite
Fines is 100 parts of meters, is mixed into 67 parts of zinc leaching residue siccatives, adds 15 parts of reducing agents, adds 3 parts of bentonite, in profit mill equipment
Carry out mixing levigate, then gained mixed material is adjusted moisture and send into roller ball press, obtain mixing pelletizing, and pelletizing is dried
Do to moisture < after 2% send into rotary hearth furnace reduce, the temperature of high-temperature region is 1250 DEG C, and the recovery time is 40min, obtains
Flue dust containing Indium sesquioxide., zinc oxide and lead oxide is discharged from preheating zone, obtains metallized pellet and discharges from discharge zone, gained gold
Belonging to pellet available iron content metal iron powder more than 90% after two stage grinding magnetic separation, iron recovery is 91%, and zinc volatilizees
Rate is 98%, and lead volatility rate is 98%, and indium volatility is 99%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. the method processing lead Zn scrap returns, described lead Zn scrap returns is leaded zinc kiln slag and zinc leaching residue, it is characterised in that bag
Include:
(1) leaded zinc kiln slag is carried out drying and processing, in order to obtain kiln slag and dry material；
(2) described kiln slag drying material is carried out levigate process, in order to obtain kiln slag fines；
(3) described zinc leaching residue is carried out drying and processing, in order to obtain zinc leaching residue siccative；
(4) described kiln slag fines, zinc leaching residue siccative, reducing agent and binding agent are mixed, in order to obtain mixed material；
(5) described mixed material is carried out pelletizing process, in order to obtain mixing pelletizing；
(6) by the feed zone of described mixing pelletizing supply to rotary hearth furnace so that described mixing pelletizing sequentially passes through described rotary hearth furnace
Preheating zone, high-temperature region reduce, the flue dust containing Indium sesquioxide., zinc oxide and lead oxide obtained from preheating zone discharge,
Discharge to metallized pellet from discharge zone；
(7) described metallized pellet is carried out mill ore magnetic selection process, in order to obtain metal iron powder and mine tailing.
Method the most according to claim 1, it is characterised in that in step (1), in described kiln slag drying material, water content is not
Higher than 6wt%.
Method the most according to claim 1 and 2, it is characterised in that in step (2), the particle diameter of described kiln slag fines is
20～100 microns, preferably 30～70 microns.
4., according to the method according to any one of claim 1-3, it is characterised in that in step (3), described zinc leaching residue is done
The water content of material is not higher than 6wt%.
5. according to the method according to any one of claim 1-4, it is characterised in that in step (4), by thin for described kiln slag
Material, described zinc leaching residue siccative, described reducing agent and described binding agent are 100:(20～80 according to mass ratio): (0～15): (2
～5) mix.
6. according to the method according to any one of claim 1-5, it is characterised in that in step (6), the temperature of described high-temperature region
Degree is 1100～1300 degrees Celsius, preferably 1200～1300 degrees Celsius.
7. according to the method according to any one of claim 1-6, it is characterised in that in step (6), the sky of described high-temperature region
Combustion ratio is 5～8.
8. according to the method according to any one of claim 1-7, it is characterised in that farther include:
(8) the described flue dust containing Indium sesquioxide., zinc oxide and lead oxide is collected through bagroom.
9. the system of the method processing lead Zn scrap returns implemented according to any one of claim 1-8, it is characterised in that bag
Include:
Kiln slag drying unit, described kiln slag drying unit has leaded zinc kiln slag entrance and kiln slag dries drier outlet；
Fine mill, described fine mill has kiln slag dries material entrance and the outlet of kiln slag fines, and described kiln slag dries material entrance
Dry drier outlet with described kiln slag to be connected；
Zinc leaching residue drying unit, described zinc leaching residue drying unit has zinc leaching residue entrance and zinc leaching residue drier outlet；
Mixing arrangement, described mixing arrangement has kiln slag fines entrance, zinc leaching residue siccative entrance, reducing agent entrance, binding agent
Entrance and mixed material outlet, described kiln slag fines entrance is connected with the outlet of described kiln slag fines, and described zinc leaching residue siccative enters
Mouth is connected with described zinc leaching residue drier outlet；
Palletizing device, described palletizing device has mixed material entrance and mixing pelletizing outlet, described mixed material entrance and institute
State mixed material outlet to be connected；
Rotary hearth furnace, sequentially forms feed zone, preheating zone, high-temperature region and discharge zone along furnace bottom rotation direction in described rotary hearth furnace,
Described feed zone is provided with mixing pelletizing entrance, and described preheating zone is provided with flue dust outlet, and described discharge zone is provided with metallization
Pelletizing exports, and described mixing pelletizing entrance is connected with the outlet of described mixing pelletizing；
Mill ore magnetic selection device, described mill ore magnetic selection device has metallized pellet entrance, metal iron powder outlet and mine tailing outlet, institute
State metallized pellet entrance to be connected with the outlet of described metallized pellet.
System the most according to claim 9, it is characterised in that farther include:
Bagroom, described bagroom has flue dust entrance, dust outlet and gas outlet, described flue dust entrance and institute
State flue dust outlet to be connected.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107190159A (en) * | 2017-06-16 | 2017-09-22 | 河北长力金属制品有限公司 | A kind of method that zinc-containing alloy is prepared containing Zn scrap returns |
| CN107881333A (en) * | 2017-12-05 | 2018-04-06 | 北京科技大学 | One kind processing chemical industry iron cement and zinc tailings process and equipment |
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| CN105648228A (en) * | 2016-03-25 | 2016-06-08 | 江苏省冶金设计院有限公司 | Rotary hearth furnace for processing lead-zinc-containing melting slag |
| CN105671328A (en) * | 2016-03-25 | 2016-06-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating lead and zinc smelting slag |
| CN205907312U (en) * | 2016-08-01 | 2017-01-25 | 江苏省冶金设计院有限公司 | System for handle plumbous zinc waste material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107190159A (en) * | 2017-06-16 | 2017-09-22 | 河北长力金属制品有限公司 | A kind of method that zinc-containing alloy is prepared containing Zn scrap returns |
| CN107190159B (en) * | 2017-06-16 | 2019-03-29 | 河北长力环保科技有限公司 | A method of zinc-containing alloy is prepared containing Zn scrap returns |
| CN107881333A (en) * | 2017-12-05 | 2018-04-06 | 北京科技大学 | One kind processing chemical industry iron cement and zinc tailings process and equipment |
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