CN205907332U - System for handle zinc furnace slag - Google Patents
System for handle zinc furnace slag Download PDFInfo
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- CN205907332U CN205907332U CN201620831276.9U CN201620831276U CN205907332U CN 205907332 U CN205907332 U CN 205907332U CN 201620831276 U CN201620831276 U CN 201620831276U CN 205907332 U CN205907332 U CN 205907332U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The utility model discloses a system for handle zinc furnace slag, include: zinc furnace slag drying device, it has the zinc furnace slag entry and zinc furnace slag dries by the fire dry discharge, breaker, it has zinc furnace slag stoving material entry and the broken material of zinc furnace slag exports, mix forming device, it has the broken material entry of zinc furnace slag, calcium class additive entry, contains the lime wash entry of aluminium oxide and mix the pelletizing export, the rotary hearth furnace forms intake zone, preheating zone, well warm area, high -temperature region, cooling space and ejection of compact district along the stove bottom rotation direction in it in proper order, and the intake zone is provided with mixed pelletizing entry, and ejection of compact district is provided with the metallized pellet export, mixes the pelletizing entry and mix the pelletizing export to link to each other, the grinding magnetic separation device, it has metallized pellet entry, the export of metal iron powder and tailing export. This system can realize the comprehensive recovery utilization of carbon among the zinc furnace slag, iron, lead and zinc to the grade of gained metal iron powder can reach more than 90%, and the volatility of zinc can reach more than 99%, and plumbous volatility can reach more than 98%.
Description
Technical field
The utility model belongs to metallurgical technology field, and specifically, what the utility model was related to a kind of process zinc kiln slag is
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 iron also enter therewith molten
Liquid, subsequently removes iron 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 iron, purification, the zinc hydrometallurgy being electrolysed,
Have the advantages that certain in the rate of recovery 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 lixiviation process.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, high in rotary kiln
Residue after the metals such as temperature lower extraction zinc, lead.Because the coke powder that Rotary Kiln is joined aborning fails to burn completely, cause portion
Point coke powder remains in kiln slag, does not reclaim, and can cause the loss of the energy, and zinc kiln slag be enriched silver-colored, golden, copper in zinc concentrate,
The valuable metals such as gallium, iron, are of great value resources.
Zinc kiln slag handling process mainly has both at home and abroad at present: beneficiation method, reduction-sulfurization method, blast furnace smelting method, melting
Chloride volatility process, smelting bath smelting process, high melt method, microwave vulcanization-flotation combined facture.But it is multiple all to there is technological process
Miscellaneous, reclaim element single or add auxiliary material excessive the problems such as it is impossible to realize the comprehensive utilization of kiln slag on a large scale.
Therefore, the existing technology processing zinc kiln slag is further improved.
Utility model content
The 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 kiln slag with a new purpose, this system can realize carbon in zinc kiln slag, iron, lead and
The comprehensive reutilization of zinc, and the grade of gained metal iron powder is up to more than 90%, the volatility of zinc up to more than 99%, lead
Volatility up to more than 98%.
In one side of the present utility model, the utility model proposes a kind of system processing zinc kiln slag.According to this reality
With new embodiment, this system includes:
Zinc kiln slag drying unit, described zinc kiln slag drying unit has zinc kiln slag entrance and zinc kiln slag dries drier outlet；
Breaker, described breaker has zinc kiln slag dries material entrance and the outlet of zinc kiln slag broken material, described zinc kiln
Slag is dried material entrance and is connected with described zinc kiln slag baking drier outlet；
Mixed-forming device, described mixed-forming device has zinc kiln slag broken material entrance, calcium class additive entrance, contains
The lime water inlet of aluminum oxide and mixing pelletizing outlet, described zinc kiln slag broken material entrance exports phase with described zinc kiln slag broken material
Even；
Rotary hearth furnace, sequentially forms feed zone, preheating zone, middle warm area, high temperature along furnace bottom rotation direction in described rotary hearth furnace
Area, cooling zone and discharge zone, described feed zone is provided with mixing pelletizing entrance, and described preheating zone is provided with flue dust outlet, described
Discharge zone is provided with metallized pellet outlet, 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 of the process zinc kiln slag according to the utility model embodiment by adding zinc kiln slag broken material with calcium class
Plus supply and carry out reduction treatment to rotary hearth furnace after agent mixing, utilize the excess carbon containing in kiln slag to be used for kiln slag as reducing agent
Middle ferriferous oxide and the drastic reduction of lead zinc compound, thus not only saving reducing agent consumption, and achieve carbon in kiln slag
Recycling, simultaneously the application add calcium class additive in dispensing stage, it is possible to reduce the internal sulfur-bearing phase of pelletizing in reduction process
With the combination of iron, thus reducing sulfur content in follow-up gained metal iron powder, and then allow gained metal iron powder as steel-making
Quality raw materials use, and pelletizing shaping after spray the limewash containing aluminum oxide, gained mixing ball not only can be improved
The intensity of group and heat-resisting quantity, prevent pelletizing soft heat bonding in rotary hearth furnace, and can generate solid sulfur material in reduction process
Phase, reduces sulphur and is volatized in flue gas, thus reducing follow-up flue gas desulfurization cost, in addition the application can realize in zinc kiln slag
The comprehensive reutilization of carbon, iron, lead and zinc, thus realizing the recycling of zinc kiln slag, solves kiln slag in prior art a large amount of
Pile up take up an area and pollution environment a difficult problem, and the grade of the application gained metal iron powder is up to more than 90%, the volatility of zinc
Up to more than 99%, the volatility of lead is up to more than 98%.
Optional, the described system processing zinc kiln slag further includes: bagroom, described bagroom has cigarette
Dirt entrance, dust outlet and gas vent, described flue dust entrance is connected with the outlet of described flue dust.
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 kiln slag according to one embodiment of the utility model；
Fig. 2 is that in system according to the process zinc kiln slag of the utility model further embodiment, the plan structure of rotary hearth furnace is shown
It is intended to；
Fig. 3 is the system structure diagram of the process zinc kiln slag according to another embodiment of the utility model；
Fig. 4 is that the method flow of the system process zinc kiln slag of the process zinc kiln slag using one embodiment of the utility model shows
It is intended to；
Fig. 5 is the method flow of the system process zinc kiln slag of the process zinc kiln slag using the utility model further embodiment
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 the utility model, and it is not intended that to the utility model
Restriction.
In description of the present utility model it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation of instruction such as " clockwise ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than the dress of instruction or hint indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Restriction.
In the 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 the utility model for the above-mentioned term can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In one side of the present utility model, the utility model proposes a kind of system processing zinc kiln slag.According to this reality
With new embodiment, with reference to Fig. 1-3, this system includes: zinc kiln slag drying unit 100, breaker 200, mixed-forming dress
Put 300, rotary hearth furnace 400 and mill ore magnetic selection device 500.
According to embodiment of the present utility model, zinc kiln slag drying unit 100 has zinc kiln slag entrance 101 and zinc kiln slag is dried
Material outlet 102, and be suitable to for zinc kiln slag to carry out drying and processing, to obtain zinc kiln slag to dry material.Thus, it is possible to after significantly improving
The volatilization efficiency of continuous reduction phase lead zinc and the organic efficiency of iron.Specifically, zinc kiln slag comes from zinc leaching residue and allocates in a large number
The waste residue that coke powder obtains through water quenching in rotary kiln after the metals such as vaporization at high temperature zinc lead gold and silver again, zinc leaching residue is mixed with coke powder
When through rotary kiln high-temperature region, slag charge is in semi-molten state to compound material, and storeroom has phenomenon adhered to one another, the oxygen in leached mud
Change iron major part and be reduced into metallic iron, due to the needs of Rotary Kiln technique, allocate substantial amounts of coal into and do not react completely, therefore kiln slag
Carbon containing is high, and slag charge is in semi-molten state simultaneously, and embedding cloth is tight mutually for each material, and in this step, gained zinc kiln slag dries material
Middle water content is 8～12wt%.
According to embodiment of the present utility model, breaker 200 has zinc kiln slag drying material entrance 201 and zinc kiln slag crushes
Material outlet 202, zinc kiln slag is dried material entrance 201 and is connected with zinc kiln slag baking drier outlet 102, and is suitable to zinc kiln obtained above
Slag is dried material and is carried out break process, obtains zinc kiln slag broken material.Specifically, breaker can be double-roll crusher, gained zinc
The particle diameter of kiln slag broken material is not higher than 4mm.
According to embodiment of the present utility model, mixed-forming device 300 has zinc kiln slag broken material entrance 301, calcium class adds
Plus agent entrance 302, the lime water inlet 303 containing aluminum oxide and mixing pelletizing outlet 304, zinc kiln slag broken material entrance 301 with
Zinc kiln slag broken material outlet 202 is connected, and is suitable to be mixed zinc kiln slag broken material and calcium class additive by obtained above
Shaping, then pelletizing surface spraying after shaping contains the limewash of aluminum oxide, obtains mixing pelletizing.Inventor finds, leads to
Cross and add calcium class additive in dispensing stage, it is possible to reduce the combination of the internal sulfur-bearing phase of pelletizing and iron in reduction process, thus dropping
Sulfur content in low follow-up gained metal iron powder, and then gained metal iron powder is used as the quality raw materials of steel-making, and
And spray the limewash containing aluminum oxide after pelletizing shaping, the intensity of gained mixing pelletizing and high temperature resistant not only can be improved
Property, prevent pelletizing soft heat bonding in rotary hearth furnace, and desulfuration product can be generated in reduction process, reduce sulphur and be volatized into
In flue gas, thus reducing follow-up flue gas desulfurization cost.
According to an embodiment of the present utility model, zinc kiln slag broken material is not subject to spy with the mixed proportion of calcium class additive
Do not limit, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, zinc kiln
Slag broken material can be 100:(5～20 with the mass ratio of calcium class additive).Inventor finds, calcium class additive addition mistake
Low it is impossible to ensure that it is fully combined with sulphur-containing substance in kiln slag, and calcium class additive addition is too high, easily causes pelletizing efflorescence
Seriously, gained green ball strength is led to reduce.
According to further embodiment of the present utility model, the particle diameter of calcium class additive is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, and the particle diameter of calcium class additive can be 75 microns～2 millimeters.Invention human hair
Existing, calcium class additive particle diameter is meticulous, easily causes pelletizing soft heat seriously, simultaneously need to increasing levigate cost, and its particle diameter is too high,
It is unfavorable for balling-up, be also unfavorable for that calcium class additive is uniformly distributed in pelletizing.
According to another embodiment of the present utility model, the particular type of calcium class additive is not particularly restricted, ability
Field technique personnel can be selected according to actual needs, and according to specific embodiment of the utility model, calcium class additive is choosing
At least one from lime stone, quick lime and calcium hydroxide.Inventor finds, can be significantly better than other using such additive
Type improves the grade of follow-up gained metal iron powder.
According to embodiment of the present utility model, with reference to Fig. 1 and 2, sequentially form along furnace bottom rotation direction in rotary hearth furnace 400
Feed zone 41, preheating zone 42, middle warm area 43, high-temperature region 44, cooling zone 45 and discharge zone 46, feed zone 41 is provided with mixing pelletizing
Entrance 401, preheating zone 42 is provided with flue dust outlet 402, and discharge zone 46 is provided with metallized pellet outlet 403, and mixing pelletizing enters
Mouthfuls 401 and mixing pelletizing outlet 304 be connected, and be suitable to supply the pelletizing that mixes obtained above to the feed zone of rotary hearth furnace, with
The rotation of furnace bottom, preheating zone, middle warm area, high-temperature region and cooling zone that mixing pelletizing sequentially passes through rotary hearth furnace are reduced, and mix
Close the fe in pelletizing3o4, pbs, zno, zns fully reduced using the c in kiln slag, obtain containing zinc oxide and lead oxide
Flue dust from preheating zone discharge, and the metallized pellet obtaining from discharge zone discharge.Inventor finds, by breaking zinc kiln slag
Particle is supplied after being mixed with calcium class additive and carries out reduction treatment to rotary hearth furnace, and the excess carbon being contained by the use of in kiln slag is as also
The former dose of drastic reduction being used for ferriferous oxide and lead zinc compound in kiln slag, thus not only save reducing agent consumption, Er Qieshi
Show the recycling of carbon in kiln slag, the comprehensive reutilization of carbon in zinc kiln slag, iron, lead and zinc can have been realized simultaneously, thus realizing
The recycling of zinc kiln slag, solves kiln slag bulk deposition in prior art and takes up an area and pollute a difficult problem for environment, and after testing,
Up to more than 99%, up to more than 98%, the ratio that sulphur is volatized into flue gas is less than 5% to the volatility of lead to the volatility of zinc.
According to an embodiment of the present utility model, the temperature of preheating zone can be 700～900 degrees Celsius, middle warm area
Temperature can be 900～1200 degrees Celsius, and the temperature of high-temperature region can be 1200～1300 degrees Celsius, and the temperature of cooling zone is permissible
For 800～900 DEG C.Thus, it is possible to improve the reduction efficiency of ferriferous oxide and lead zinc mixture further.
According to embodiment of the present utility model, mill ore magnetic selection device 500 has metallized pellet entrance 501, metal iron powder
Outlet 502 and mine tailing outlet 503, metallized pellet entrance 501 is connected with metallized pellet outlet 403, and is suitable to obtain above-mentioned
To metallized pellet be crushed to after cooling after below 2mm and carry out mill ore magnetic selection, such that it is able to separate obtain metal iron powder and
Mine tailing, and by detection, in metal iron powder, Iron grade can reach more than 90%, s content < 0.1%, cu content 2～3%, tail
In ore deposit, iron content is only 5～6%, and iron recovery reaches more than 90%.
The system of the process zinc kiln slag according to the utility model embodiment is passed through zinc kiln slag broken material and calcium class additive
Supply after mixing and carry out reduction treatment to rotary hearth furnace, utilize the excess carbon containing in kiln slag to be used for iron in kiln slag as reducing agent
Oxide and the drastic reduction of lead zinc compound, thus not only saving reducing agent consumption, and achieve in kiln slag carbon again
Using the application adds calcium class additive in dispensing stage simultaneously, it is possible to reduce the internal sulfur-bearing phase of pelletizing and iron in reduction process
Combination, thus reducing sulfur content in follow-up gained metal iron powder, so allow gained metal iron powder as steel-making excellent
Matter raw material uses, and sprays the limewash containing aluminum oxide after pelletizing shaping, not only can improve gained mixing pelletizing
Intensity and heat-resisting quantity, prevent pelletizing soft heat bonding in rotary hearth furnace, and can generate desulfuration product in reduction process, subtract
Few sulphur is volatized in flue gas, thus reducing follow-up flue gas desulfurization cost, in addition the application can realize carbon in zinc kiln slag, iron,
Lead and the comprehensive reutilization of zinc, thus realizing the recycling of zinc kiln slag, solving kiln slag bulk deposition in prior art and accounting for
Ground and a difficult problem for pollution environment, and the grade of the application gained metal iron powder is up to more than 90%, the volatility of zinc up to
More than 99%, the volatility of lead is up to more than 98%.
With reference to Fig. 3, the system of the process zinc kiln slag according to the utility model embodiment further includes: bagroom
600.
According to embodiment of the present utility model, bagroom 600 has flue dust entrance 601, dust outlet 602 and gas
Export 603, flue dust entrance 601 is connected with flue dust outlet 402, and be suitable for use with bagroom and discharge in rotary hearth furnace is contained
The flue dust of zinc oxide and lead oxide is gathered dust, thus reclaiming zinc oxide and lead oxide.
Understand for convenience, below with reference to Figure 4 and 5 to processing at the system of zinc kiln slag using the utility model embodiment
The method of reason zinc kiln slag is described in detail.According to embodiment of the present utility model, the method includes:
S100: zinc kiln slag is carried out drying and processing
According to embodiment of the present utility model, zinc kiln slag is carried out drying and processing, to obtain zinc kiln slag to dry material.By
This, can significantly improve the volatilization efficiency of sequential reduction stage lead zinc and the organic efficiency of iron.Specifically, zinc kiln slag comes from
Zinc leaching residue allocates the waste residue that a large amount of coke powders obtain through water quenching in rotary kiln after the metals such as vaporization at high temperature zinc lead gold and silver again, zinc into
When through rotary kiln high-temperature region, slag charge is in semi-molten state to the mixed material of leached mud and coke powder, and storeroom has adhered to one another
Phenomenon, the iron 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
React completely, therefore kiln slag carbon containing is high, slag charge is in semi-molten state simultaneously, embedding cloth is tight mutually for each material, and in this step,
It is 8～12wt% that gained zinc kiln slag dries water content in material.
S200: zinc kiln slag drying material is carried out break process
According to embodiment of the present utility model, zinc kiln slag obtained above drying material is carried out break process, obtains zinc kiln
Slag broken material.Specifically, zinc kiln slag drying material is crushed to particle diameter and is not higher than 4mm by sampling double-roll crusher.
S300: zinc kiln slag broken material and calcium class additive are carried out mixed-forming, contains in pelletizing surface spraying after shaping
The limewash of aluminum oxide
According to embodiment of the present utility model, zinc kiln slag broken material obtained above and calcium class additive are mixed into
Type, contains the limewash of aluminum oxide in pelletizing surface spraying after shaping, obtain mixing pelletizing.Inventor finds, by dispensing
Stage adds calcium class additive, it is possible to reduce the combination of the internal sulfur-bearing phase of pelletizing and iron in reduction process, thus reducing follow-up institute
Obtain sulfur content in metal iron powder, and then gained metal iron powder is used as the quality raw materials of steel-making, and in pelletizing
Spray the limewash containing aluminum oxide after shaping, intensity and the heat-resisting quantity of gained mixing pelletizing can be improved, prevent pelletizing from existing
Soft heat bonding in rotary hearth furnace, can also generate desulfuration product in reduction process, reduce sulphur and be volatized in flue gas, thus reducing
Follow-up flue gas desulfurization cost.
According to an embodiment of the present utility model, zinc kiln slag broken material is not subject to spy with the mixed proportion of calcium class additive
Do not limit, those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, zinc kiln
Slag broken material can be 100:(5～20 with the mass ratio of calcium class additive).Inventor finds, calcium class additive addition mistake
Low it is impossible to ensure that it is fully combined with sulphur-containing substance in kiln slag, and calcium class additive addition is too high, easily causes pelletizing efflorescence
Seriously, gained green ball strength is led to reduce.
According to further embodiment of the present utility model, the particle diameter of calcium class additive is not particularly restricted, this area skill
Art personnel can be selected according to actual needs, and the particle diameter of calcium class additive can be 75 microns～2 millimeters.Invention human hair
Existing, calcium class additive particle diameter is meticulous, easily causes pelletizing soft heat seriously, simultaneously need to increasing levigate cost, and its particle diameter is too high,
It is unfavorable for balling-up, be also unfavorable for that calcium class additive is uniformly distributed in pelletizing.
According to another embodiment of the present utility model, the particular type of calcium class additive is not particularly restricted, ability
Field technique personnel can be selected according to actual needs, and according to specific embodiment of the utility model, calcium class additive is choosing
At least one from lime stone, quick lime and calcium hydroxide.Inventor finds, can be significantly better than other using such additive
Type improves the grade of follow-up gained metal iron powder.
S400: mixing pelletizing is supplied feed zone to rotary hearth furnace so that mixing pelletizing sequentially passes through the preheating of rotary hearth furnace
Area, middle warm area, high-temperature region and cooling zone are reduced, and the flue dust containing zinc oxide and lead oxide obtaining is discharged from preheating zone,
Obtain metallized pellet to discharge from discharge zone
In this step, specifically, mixing pelletizing obtained above is supplied to the feed zone of rotary hearth furnace, turning with furnace bottom
Dynamic, preheating zone, middle warm area, high-temperature region and cooling zone that mixing pelletizing sequentially passes through rotary hearth furnace are reduced, in mixing pelletizing
fe3o4, pbs, zno, zns fully reduced using the c in kiln slag, the flue dust containing zinc oxide and lead oxide obtaining is from pre-
Hot-zone is discharged, and the metallized pellet obtaining is discharged from discharge zone.Inventor finds, by by zinc kiln slag broken material and calcium class
Supply after additive mixing and carry out reduction treatment to rotary hearth furnace, utilize the excess carbon containing in kiln slag to be used for kiln as reducing agent
The drastic reduction of ferriferous oxide and lead zinc compound in slag, thus not only saving reducing agent consumption, and achieves in kiln slag
The recycling of carbon, can realize the comprehensive reutilization of carbon in zinc kiln slag, iron, lead and zinc simultaneously, thus realizing the money of zinc kiln slag
Sourceization utilizes, and solves kiln slag bulk deposition in prior art and takes up an area and pollute a difficult problem for environment, and after testing, the volatility of zinc
Up to more than 99%, up to more than 98%, the ratio that sulphur is volatized into flue gas is less than 5% to the volatility of lead.
According to an embodiment of the present utility model, the temperature of preheating zone can be 700～900 degrees Celsius, middle warm area
Temperature can be 900～1200 degrees Celsius, and the temperature of high-temperature region can be 1200～1300 degrees Celsius, and the temperature of cooling zone is permissible
For 800～900 DEG C.Thus, it is possible to improve the reduction efficiency of ferriferous oxide and lead zinc mixture further.
S500: metallized pellet is carried out mill ore magnetic selection process
In this step, specifically, metallized pellet obtained above is crushed to after below 2mm after cooling and carries out ore grinding
Magnetic separation, such that it is able to separate obtain metal iron powder and mine tailing, and by detection, in metal iron powder Iron grade can reach 90% with
On, < 0.1%, cu content 2～3%, in mine tailing, iron content is only 5～6% to s content, and iron recovery reaches more than 90%.
The system of the process zinc kiln slag according to the utility model embodiment processes the method for zinc kiln slag by breaking zinc kiln slag
Particle is supplied after being mixed with calcium class additive and carries out reduction treatment to rotary hearth furnace, and the excess carbon being contained by the use of in kiln slag is as also
The former dose of drastic reduction being used for ferriferous oxide and lead zinc compound in kiln slag, thus not only save reducing agent consumption, Er Qieshi
Show the recycling of carbon in kiln slag, the application adds calcium class additive in dispensing stage simultaneously, it is possible to reduce ball in reduction process
The internal sulfur-bearing phase of group and the combination of iron, thus reducing sulfur content in follow-up gained metal iron powder, and then make gained metal iron powder
Can use as the quality raw materials of steel-making, and spray the limewash containing aluminum oxide after pelletizing is molded, not only can be
Generate desulfuration product in reduction process, reduce sulphur and be volatized in flue gas, thus reducing follow-up flue gas desulfurization cost, and also permissible
Improve intensity and the heat-resisting quantity of gained mixing pelletizing, prevent pelletizing soft heat bonding in rotary hearth furnace, in addition the application can be real
Carbon, the comprehensive reutilization of iron, lead and zinc in existing zinc kiln slag, thus realizing the recycling of zinc kiln slag, solve prior art
Middle kiln slag bulk deposition take up an area and pollution environment a difficult problem, and the grade of the application gained metal iron powder is up to more than 90%,
, up to more than 99%, the volatility of lead is up to more than 98% for the volatility of zinc.
With reference to Fig. 5, the method for the system process zinc kiln slag of the process zinc kiln slag according to the utility model embodiment is further
Including:
S600: the flue dust containing zinc oxide and lead oxide is collected through bagroom
In this step, specifically, using bagroom to the cigarette containing zinc oxide and lead oxide discharged in rotary hearth furnace
Dirt is gathered dust, thus reclaiming zinc oxide and lead oxide.
As described above, can be had the advantages that selected from following according to the method for the process zinc kiln slag of the utility model embodiment
At least one:
The method of the process zinc kiln slag according to the utility model embodiment does not need to add coke, can directly utilize in kiln slag
Remaining c realizes magnetic iron ore in slag, lead, the reduction of zinc sulfide；
The method of the process zinc kiln slag according to the utility model embodiment is passed through to add calcium class additive, reduces inside pelletizing
Sulfur-bearing phase and the combination of iron, can get the metal iron powder that s content is less than 0.06%, in iron powder, iron content can reach more than 90%,
Previous literature is only directly to carry out magnetic separation to kiln slag, iron content only 60% about in Iron concentrate, and sulfur content is higher than 0.5%,
Harmful element content high it is impossible to as the quality raw materials made steel；
The method of the process zinc kiln slag according to the utility model embodiment pelletizing surface spraying after shaping is salic
The limewash of powder, on the one hand can generate desulfuration product, reduce sulphur and be volatized into flue gas, the volatility of sulphur can be reduced to less than 5%,
Reduce flue gas desulfurization cost, on the other hand improve pellet strength and heat-resisting quantity, prevent pelletizing soft heat bonding；
The method process is simple of the process zinc kiln slag according to the utility model embodiment is feasible, and low cost is simple by kiln slag
Crushing need not be levigate, and formative stage is controlled by grade and the limewash of the salic powder of pelletizing surface spraying can achieve soap-free emulsion polymeization
Agent is added.
Below with reference to specific embodiment, the utility model is described, it should be noted that these embodiments are only
Descriptive, and limit the utility model never in any form.
Embodiment 1
In zinc kiln slag fe content be 38%, c content be 12%, pb content be 0.8%, zn content be 3%, zinc kiln slag is dried
Doing to moisture is 12%, then gained zinc kiln slag drying material is crushed to below 4mm and accounts for 75%, then allocates the 200 of 5% into
Purpose quick lime fine powder, the lime stone of 5% 2mm, three kinds of materials, after mixing, enter and roll-in ball machine are molded, shaping
The limewash of the salic powder of pelletizing surface spraying afterwards, obtains mixing pelletizing (agglomerate drop strength reaches more than 10 times), will
To mixing pelletizing be directly entered in rotary hearth furnace and reduced, wherein, the temperature of preheating zone is 1200 degrees Celsius, the temperature of middle warm area
Spend for 1280 degrees Celsius, the temperature of high-temperature region is 1280 degrees Celsius, the temperature < 1100 DEG C of cooling zone, the recovery time is 20min,
And collect the dust containing zno and pbo of this stage generation by bagroom, gained metallized pellet is cooled broken
To below 2mm, carry out primary grinding magnetic separation, obtain the metal iron powder containing cu, in iron powder, tfe content for 91.1%, cu content is
2.22%, s content is 0.09%, and the rate of recovery of ferro element can reach 91%, copper recovery 72%.Lead volatility rate 98.22%, zn
Volatility 99.23%, sulphur enter flue gas ratio be 3.55%.
Embodiment 2
In zinc kiln slag fe content be 38%, c content be 12%, pb content be 0.8%, zn content be 3%, zinc kiln slag is dried
Doing to moisture is 8%, then gained zinc kiln slag drying material is crushed to below 3mm and accounts for 75%, then allocates 20% 2mm into
Lime stone, material through mix after, enter roll-in ball machine is molded, the salic powder of pelletizing surface spraying after shaping
Limewash, obtains mixing pelletizing (agglomerate drop strength reaches more than 10 times), the mixing obtaining pelletizing is directly entered in rotary hearth furnace
Reduced, wherein, the temperature of preheating zone is 1200 degrees Celsius, and the temperature of middle warm area is 1280 degrees Celsius, the temperature of high-temperature region
For 1280 degrees Celsius, the temperature < 1100 DEG C of cooling zone, the recovery time is 30min, and collects this stage by bagroom
The dust containing zno and pbo generating, gained metallized pellet is cooled to be crushed to below 2mm, carries out primary grinding magnetic separation,
Obtain the metal iron powder containing cu, in iron powder tfe content be 90.3%, cu content be 2.42%, s content be 0.06%, ferro element
The rate of recovery can reach 89.2%, copper recovery 70%.Lead volatility rate 98.02%, the volatility 99% of zn, sulphur enters flue gas ratio
Rate is 4.89%.
Embodiment 3
In zinc kiln slag fe content be 26%, c content be 15%, pb content be 1.2%, zn content be 2.5%, by zinc kiln slag
Drying to moisture is 10%, then gained zinc kiln slag drying material is crushed to below 1mm and accounts for 75%, then allocates 200 mesh into
Calcium hydroxide 10%, 1mm lime stone 10%, material, after mixing, enters and roll-in ball machine is molded, the pelletizing surface after shaping
Spray the limewash of salic powder, obtain mixing pelletizing (agglomerate drop strength reaches more than 10 times), by the mixing obtaining pelletizing
It is directly entered in rotary hearth furnace and is reduced, wherein, the temperature of preheating zone is 1200 degrees Celsius, and the temperature of middle warm area is Celsius for 1280
Degree, the temperature of high-temperature region is 1280 degrees Celsius, the temperature < 1100 DEG C of cooling zone, and the recovery time is 30min, and passes through cloth bag
The dust containing zno and pbo of this stage generation collected by dust-precipitator, and gained metallized pellet is cooled to be crushed to below 2mm, enters
Row primary grinding magnetic separation, obtains the metal iron powder containing cu, and in iron powder, tfe content is 2.42%, s content for 92.3%, cu content
For 0.04%, the rate of recovery of ferro element can reach 91.2%, copper recovery 77%.Lead volatility rate 98.88%, the volatility of zn
99.34%, it is 4.5% that sulphur enters flue gas ratio.
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 kiln slag is it is characterised in that include:
Zinc kiln slag drying unit, described zinc kiln slag drying unit has zinc kiln slag entrance and zinc kiln slag dries drier outlet；
Breaker, described breaker has zinc kiln slag dries material entrance and the outlet of zinc kiln slag broken material, and described zinc kiln slag dries
Siccative entrance dries drier outlet with described zinc kiln slag and is connected；
Mixed-forming device, described mixed-forming device has zinc kiln slag broken material entrance, calcium class additive entrance, contains oxidation
The lime water inlet of aluminium and mixing pelletizing outlet, described zinc kiln slag broken material entrance is connected with the outlet of described zinc kiln slag broken material；
Rotary hearth furnace, sequentially forms feed zone, preheating zone, middle warm area, high-temperature region, cold along furnace bottom rotation direction in described rotary hearth furnace
But area and discharge zone, described feed zone is provided with mixing pelletizing entrance, and described preheating zone is provided with flue dust outlet, described discharge zone
It is provided with metallized pellet outlet, 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.
2. system according to claim 1 is it is characterised in that further include:
Bagroom, described bagroom has flue dust entrance, dust outlet and gas vent, described flue dust entrance and institute
State flue dust outlet to be connected.
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| CN201620831276.9U CN205907332U (en) | 2016-08-01 | 2016-08-01 | System for handle zinc furnace slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106119530A (en) * | 2016-08-01 | 2016-11-16 | 江苏省冶金设计院有限公司 | Process the method and system of zinc kiln slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106119530A (en) * | 2016-08-01 | 2016-11-16 | 江苏省冶金设计院有限公司 | Process the method and system of zinc kiln slag |
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