CN106435204A - System and method for treating copper slag through fuel gas melt separation - Google Patents
System and method for treating copper slag through fuel gas melt separation Download PDFInfo
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- CN106435204A CN106435204A CN201611028955.3A CN201611028955A CN106435204A CN 106435204 A CN106435204 A CN 106435204A CN 201611028955 A CN201611028955 A CN 201611028955A CN 106435204 A CN106435204 A CN 106435204A
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- rotary hearth
- hearth furnace
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/06—Making spongy iron or liquid steel, by direct processes in multi-storied furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- 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
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- 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
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a system and a method for treating copper slag through fuel gas melt separation. The system comprises a rotary hearth furnace and a fuel gas melt separation furnace, wherein the rotary hearth furnace comprises a charge hole, a discharge hole, a flue gas outlet, a pre-reducing layer and a reducing layer; the pre-reducing layer is mounted in the furnace body of the rotary hearth furnace, and is positioned above the reducing layer; the pre-reducing layer is an open loop structure, and is equipped with a head end and a tail end; a gap is formed in the horizontal direction between the head end and the tail end; and the reducing layer is built by a refractory material, and is laid on the hearth of the rotary hearth furnace. According to the system and the method disclosed by the invention, copper slag and ingredients are pre-reduced and reduced in the rotary hearth furnace after being prepared into pellets, so that reducing effect is better, a pellet metallization ratio is high, and grade of molten iron obtained after fuel gas melt separation is high; and flue gas generated by the rotary hearth furnace is collected to obtain zinc-rich dust, so that synchronous recycling of iron and zinc is realized.
Description
Technical field
The invention belongs to technical field of smelting, the system and method that office reason copper ashes is melted in more particularly, to a kind of combustion gas.
Background technology
Precious Metals Resources are rare, expensive, are increasingly subject to the most attention of countries in the world, and noble metal industrial waste is
These industrial wastes are effectively processed and profit by expensive heavy secondary resource in world today's Precious Metals Resources increasingly in short supply
With having considerable economic worth.
Copper ashes is the slag of generation during copper metallurgy, belongs to one kind of non-ferrous metal slag.Using giving up that reflection oven process copper metallurgy is discharged
Slag is reverberatory furnace copper ashes, is blast furnace copper ashes using blast furnace copper metallurgy discharge.The copper yield of China has occupied the first in the world,
In the production process of copper, create substantial amounts of copper ashes, copper ashes heap has slag field, not only land occupation but also pollute environment, even more provide
The huge waste in source.Substantial amounts of available resource is contained, the chemical composition of copper ashes is SiO in copper ashes2：30～40%, Fe：27
～35%, Zn：2～3%.
The utilization technology of copper ashes mainly includes beneficiating method, pyrogenic process and three kinds of wet method.Beneficiating method processes copper ashes and can reclaim
Certain iron ore concentrate, but gained iron concentrate grade is low, and most tailings cannot utilize, and overall recycling level is low.Fire
Method processes copper ashes due to high-temperature process high energy consumption, complex process equipment, the shortcomings of operating cost is high.In wet treatment copper ashes flow process
It is related to substantial amounts of acid-base solution, there is secondary pollution, environmental protection high cost.
Content of the invention
The invention is intended to proposing a kind of combustion gas to melt the system and method that copper ashes is managed in office, being prepared by copper ashes after pelletizing, turning bottom
Stove carries out prereduction and reduction, and more preferably, pelletizing degree of metalization is high for reduction effect, and the molten iron grade of acquisition after point stove melts point is melted in combustion gas
High.
An object of the present invention is to provide a kind of combustion gas to melt the system that copper ashes is managed in office, including：Rotary hearth furnace and combustion gas are melted
Divide stove,
Described rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet, prereduction layer and reducing zone,
Described prereduction layer is arranged in the body of heater of described rotary hearth furnace, positioned at the top of described reducing zone, described prereduction
Layer is open loop structure, is provided with head end and tail end, is provided with gap in the horizontal direction between described head end and described tail end,
Described reducing zone forms for refractory material laying, is laid on the furnace bottom of described rotary hearth furnace；
Described combustion gas is melted a point stove and is included feeding mouth；
Described rotary hearth furnace discharging opening connects described combustion gas and melts a point stove feeding mouth.
Rotary hearth furnace is used for prereduction and the reduction of pelletizing, and the pelletizing degree of metalization processing through rotary hearth furnace is higher.Combustion gas is melted
Divide stove to be used for a molten point of metallized pellet, obtain molten iron.
As preferred scheme, rotary hearth furnace feeding mouth is arranged on the top furnace roof of prereduction layer head end, is easy to material
Enter.Rotary hearth furnace discharging opening is arranged on the lower section of prereduction layer head end, the top of reducing zone, is easy to the discharge of material.Rotary hearth furnace
Exhanst gas outlet be used for collect rotary hearth furnace discharge flue gas obtain zinc-rich dust.
In the present invention, described system further includes atomizer mill, damp mill and pelletizer, and described atomizer mill includes discharging
Mouthful, described damp mill includes feeding mouth and discharging opening, and described pelletizer includes feeding mouth and discharging opening；Described atomizer mill discharging opening
Connect described damp mill feeding mouth, described damp mill discharging opening connects pelletizer feeding mouth, described pelletizer discharging opening connects institute
State rotary hearth furnace feeding mouth.
Atomizer mill is used for for copper ashes, reducing agent, additive being finely ground to the granularity needed for subsequent treatment.Damp mill is used for will be thin
Compound after mill adds binding agent mix homogeneously.Pelletizer is used for the compound pelletizing that will mix.
In the present invention, described rotary hearth furnace further includes barricade, and described barricade is vertically fixed on the body of heater of described rotary hearth furnace
Interior, described barricade is located between described head end and described tail end, and described head end, described tail end are separated.Dams setting is in head end
In the middle of tail end, can prevent the pelletizing that prereduction layer falls from falling near discharging opening, prevent pelletizing not to be reduced just discharge and turn
Bottom stove.
Specifically, reducing zone 10～20cm described in described barricade distance from bottom.Barricade bottom to reducing zone upper surface away from
Can pass through from material to be ensured.
Further.The upper surface rotation direction of described prereduction layer is contrary with the rotation direction of described reducing zone.In advance also
The upper surface rotation direction of former layer contrary with the rotation direction of described reducing zone so that material prereduction layer and reducing zone fortune
Dynamic in opposite direction, improve the reduction effect of material.
It is a further object of the present invention to provide a kind of method that utilization said system processes copper ashes, comprise the steps：
A, by 100 parts of copper ashes, 20～30 parts of reducing agents, 5～10 parts of additive fine grindings, then with 5～10 parts of binding agents mix
Even pelletizing, obtains pelletizing；
B, the described pelletizing described rotary hearth furnace of feeding is carried out prereduction and drastic reduction, obtain metallized pellet, collect and turn
The flue gas that bottom fire grate goes out obtains zinc-rich dust；
C, described metallized pellet is sent into combustion gas with addition of quick lime melt refine after the fusing of point stove, obtain molten iron, described gold
Belong to mass ratio=1 of pellet and quick lime:0.05～0.1.
As preferred scheme, the quality of granularity≤200 mesh in described copper ashes after fine grinding in step A, reducing agent, additive
Percentage ratio is more than 85%.
In the present invention, in described reducing agent, the quality of carbon is divided into and is not less than 80%；Described additive is limestone, Sal Nitri
One or more of ash, sodium carbonate；Described binding agent is starch solution.
Specifically, in rotary hearth furnace described in step B, temperature is 1200～1350 DEG C, and described prereduction layer rotates week age
For 20～50min, it is 30～60min that described reducing zone rotates week age.
Further, the time of refine described in step C is 0.5～1h.
The system and method that copper ashes is managed in office are melted in the combustion gas that the present invention provides, and copper ashes and dispensing are made feeding after pelletizing and turns
Bottom stove, rotary hearth furnace prereduction layer by prereduction, enter back into reducing zone reduction, pelletizing degree of metalization is high；Prereduction layer is abundant
Using reducing zone fume afterheat, reducing energy consumption；Combustion gas melts that the molten iron grade obtaining after point stove melts point is high, collects the flue gas producing and obtains
Obtain zinc-rich dust, realize ferrum in copper ashes, zinc synchronously reclaims.
Brief description
Fig. 1 is that the system schematic that copper ashes is managed in office is melted in combustion gas of the present invention；
Fig. 2 is the partial view of rotary hearth furnace barricade of the present invention；
Fig. 3 is the method flow diagram of the system process copper ashes of the present invention.
In figure：
1- atomizer mill；2- damp mill；3- pelletizer；4- rotary hearth furnace；
401- rotary hearth furnace feeding mouth；402- rotary hearth furnace discharging opening；403- exhanst gas outlet；
404- prereduction layer；405- reducing zone；406- barricade；
A point stove is melted in 5- combustion gas.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so that energy
The advantage enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
As shown in Figure 1, on the one hand, the embodiment of the present invention provide a kind of combustion gas melt office manage copper ashes system, including：Fine grinding
A point stove 5 is melted in machine 1, damp mill 2, pelletizer 3, rotary hearth furnace 4 and combustion gas.
Atomizer mill 1 includes feeding mouth and discharging opening.Atomizer mill 1 is used for copper ashes and dispensing are finely ground to needed for subsequent treatment
Granularity.
Damp mill 2 includes feeding mouth and discharging opening.Damp mill 2 is used for for the compound after fine grinding adding binding agent mixing all
Even.
Pelletizer 3 includes feeding mouth and discharging opening.Pelletizer 3 is used for the compound pelletizing that will mix.Spherical material is more
Beneficial to thermally equivalent in rotary hearth furnace 4.It is good that suitable pellet size makes pelletizing conduct heat, and reaches good reduction effect.
Rotary hearth furnace 4 is used for prereduction and the reduction of pelletizing.
Combustion gas is melted a point stove 5 and is included feeding mouth and discharging opening.Fusing and the refine that point stove 5 is used for metallized pellet is melted in combustion gas,
Obtain high-grade molten iron.
As depicted in figs. 1 and 2, rotary hearth furnace 4 includes feeding mouth 401, discharging opening 402, exhanst gas outlet 403, prereduction layer
404th, reducing zone 405 and barricade 406.
Rotary hearth furnace 4 constitutes annular space by body of heater and furnace bottom, and furnace bottom is rotatable.Prereduction layer 404 is arranged on rotary hearth furnace 4
In body of heater, positioned at the top of reducing zone 405.Prereduction layer 404 is open loop structure, is provided with head end and tail end, head end and tail end it
Between be provided with gap in the horizontal direction.Reducing zone 405 is formed by refractory material laying, is laid on the furnace bottom of rotary hearth furnace 4.
Prereduction layer 404 includes support and chassis.Support is arranged on body of heater, is open loop structure.The upper surface of support, under
Surface arranges multiple chassis, forms the chassis chain that head and the tail connect, and chassis chain can move along the surface of support, by being arranged on support
On power set drive.
As preferred scheme, rotary hearth furnace feeding mouth 401 is arranged on the top furnace roof of prereduction layer 404 head end, is easy to
The entrance of material.The lower section setting chute of rotary hearth furnace feeding mouth 401, so that after pelletizing is entered by rotary hearth furnace feeding mouth 401, along
Chute reaches the head end of prereduction layer 404.Rotary hearth furnace discharging opening 402 is arranged on the lower section of prereduction layer 404 head end, reducing zone
405 top, is easy to the discharge of material.The flue gas that the exhanst gas outlet 403 of rotary hearth furnace is used for collecting rotary hearth furnace 4 discharge obtains zinc-rich
Dust.
The barricade 406 of rotary hearth furnace is vertically fixed in the body of heater of rotary hearth furnace 4, connect the lateral wall of rotary hearth furnace, medial wall and
Furnace roof.Barricade 406 is located between head end and tail end, and head end, tail end are separated.Barricade 406 is arranged in the middle of head end and tail end, can
To prevent the pelletizing that prereduction layer 404 falls from falling near discharging opening 402, prevent pelletizing not just to be reduced and discharge rotary hearth furnace.
As preferred embodiment, barricade 406 bottom is 10～20cm with the distance of reducing zone 405 upper surface.
Rotary hearth furnace 4 adopts regenerative gas burner to provide heat.Regenerative gas burner is installed on rotary hearth furnace both sides
On the wall of side, above prereduction layer 404 lower section, reducing zone 405.
Atomizer mill 1 discharging opening connects damp mill 2 feeding mouth, and damp mill 2 discharging opening connects pelletizer 3 feeding mouth, pelletizer 3
Discharging opening connects rotary hearth furnace feeding mouth 401, and rotary hearth furnace discharging opening 402 connects combustion gas and melts point stove 5 feeding mouth.
Further, the upper surface rotation direction of prereduction layer 404 is contrary with the rotation direction of reducing zone 405.Fig. 1 and Tu
In 2, single arrow dotted lines represent prereduction layer 404 direction of rotation, and dashed double represents reducing zone 405 direction of rotation.Prereduction
Layer 404 upper surface rotation direction contrary with the rotation direction of reducing zone 405 so that material is in prereduction layer 404 and reducing zone
405 direction of motion is contrary, improves the reduction effect of material.
The embodiment of the present invention, first by copper ashes and the finely ground machine of dispensing 1 fine grinding, then sends into material in damp mill 2, plus
Enter binding agent mix homogeneously, afterwards material is processed through pelletizer 3, obtain pelletizing.Pelletizing is sent into by rotary hearth furnace feeding mouth 401
Rotary hearth furnace, falls in the head end of prereduction layer 404 along chute, then pelletizing rotates to the tail end of prereduction layer 404, falls in reducing zone
On 405.Pelletizing rotates a circle in reducing zone, obtains metallized pellet, discharges through rotary hearth furnace discharging opening 402.Collect in rotary hearth furnace 4
Flue gas obtain zinc-rich powder.Metallized pellet melts refine after point stove 5 fusing through combustion gas, obtains molten iron.
On the other hand, as shown in figure 3, the embodiment of the present invention provides a kind of method of utilization said system process copper ashes, bag
Include following steps：
A, by 100 parts of copper ashes, 20～30 parts of reducing agents, 5～10 parts of additive fine grindings, then with 5～10 parts of binding agents mix
Even pelletizing, obtains pelletizing；
B, the described pelletizing described rotary hearth furnace of feeding is carried out prereduction and drastic reduction, obtain metallized pellet, collect and turn
The flue gas that bottom fire grate goes out obtains zinc-rich dust；
C, described metallized pellet is sent into combustion gas with addition of quick lime melt refine after the fusing of point stove, obtain molten iron, described gold
Belong to mass ratio=1 of pellet and quick lime:0.05～0.1.
As preferred scheme, the quality of granularity≤200 mesh in described copper ashes after fine grinding in step A, reducing agent, additive
Percentage ratio is more than 85%.
In the present invention, in described reducing agent, the quality of carbon is divided into and is not less than 80%；Described additive is limestone, Sal Nitri
One or more of ash, sodium carbonate；Described binding agent is starch solution.
Specifically, in rotary hearth furnace described in step B, temperature is 1200～1350 DEG C, and described prereduction layer rotates week age
For 20～50min, it is 30～60min that described reducing zone rotates week age.
Further, refining time described in step C is 0.5～1h.
The system and method that copper ashes is managed in office are melted in the combustion gas that the present invention provides, and copper ashes and dispensing are made feeding after pelletizing and turns
Bottom stove, carries out prereduction and reduction in rotary hearth furnace, and pelletizing degree of metalization is high；Prereduction layer makes full use of more than reducing zone flue gas
Heat, reducing energy consumption；Combustion gas melts that the molten iron grade obtaining after point stove melts point is high, collects the flue gas producing and obtains zinc-rich dust, realizes
In copper ashes, ferrum, zinc synchronously reclaim；Simple system, the treating capacity of rotary hearth furnace is big.
Embodiment 1
By 100 parts of copper ashes, 20 parts of reduction coal (mass components of C：82.06%), 8 parts of additives (limestone) are finely ground to grain
The granular mass accounting 86.35% of degree≤200 mesh mixes, and 6 parts of binding agents mix pelletizing, enter from rotary hearth furnace feeding mouth, turn
1280 DEG C of bottom stove reduction temperature, prereduction layer rotates week age 30min, and reducing zone rotates week age 40min, and pelletizing is respectively
Discharge from rotary hearth furnace discharging opening through prereduction layer and reducing zone, collect the flue gas acquisition zinc-rich dust that rotary hearth furnace is discharged, will turn
The thermal state metal pellet that bottom fire grate goes out is according to mass ratio 1:0.05 enters combustion gas with addition of quick lime melts refine after point stove fusing
0.6h obtains molten iron and slag.
Embodiment 2
By 100 parts of copper ashes, 25 parts of reduction coal (mass components of C：81.58%), 5 parts of additives (limestone) are finely ground to grain
The granular mass accounting 88.59% of degree≤200 mesh mixes, and 8 parts of binding agents mix pelletizing, enter from rotary hearth furnace feeding mouth, turn
1200 DEG C of bottom stove reduction temperature, prereduction layer rotates week age 20min, and reducing zone rotates week age 60min, and pelletizing is respectively
Discharge from rotary hearth furnace discharging opening through prereduction layer and reducing zone, collect the flue gas acquisition zinc-rich dust that rotary hearth furnace is discharged, will turn
The thermal state metal pellet that bottom fire grate goes out is according to mass ratio 1:0.06 enters combustion gas with addition of quick lime melts refine after point stove fusing
0.7h obtains molten iron and slag.
Embodiment 3
By 100 parts of copper ashes, 30 parts of reduction coal (mass components of C：83.58%), 10 parts of additives (limestone) are finely ground to
The granular mass accounting 87.46% of granularity≤200 mesh mixes, and 9 parts of binding agents mix pelletizing, enter from rotary hearth furnace feeding mouth,
1350 DEG C of rotary hearth furnace reduction temperature, prereduction layer rotates week age 50min, and reducing zone rotates week age 30min, and pelletizing divides
Do not discharge from rotary hearth furnace discharging opening through prereduction layer and reducing zone, collect the flue gas acquisition zinc-rich dust that rotary hearth furnace is discharged, will
The thermal state metal pellet that rotary hearth furnace is discharged is according to mass ratio 1:0.09 enters combustion gas with addition of quick lime melts refine after point stove fusing
0.9h obtains molten iron and slag.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this in order to illustrate rather than
The scope of invention, it will be understood by those within the art that, right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.Additionally, indication unless the context
Outward, the word occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can use in conjunction with all or part of of any other embodiment.
Claims (10)
1. the system that copper ashes is managed in office is melted in a kind of combustion gas, including：A point stove is melted in rotary hearth furnace and combustion gas,
Described rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet, prereduction layer and reducing zone,
Described prereduction layer is arranged in the body of heater of described rotary hearth furnace, and positioned at the top of described reducing zone, described prereduction layer is
Open loop structure, is provided with head end and tail end, is provided with gap in the horizontal direction between described head end and described tail end,
Described reducing zone forms for refractory material laying, is laid on the furnace bottom of described rotary hearth furnace；
Described combustion gas is melted a point stove and is included feeding mouth；
Described rotary hearth furnace discharging opening connects described combustion gas and melts a point stove feeding mouth.
2. according to claim 1 system it is characterised in that described system further includes atomizer mill, damp mill and pelletizing
Machine, described atomizer mill includes discharging opening, and described damp mill includes feeding mouth and discharging opening, and described pelletizer includes feeding mouth and goes out
Material mouth；Described atomizer mill discharging opening connects described damp mill feeding mouth, and described damp mill discharging opening connects pelletizer feeding mouth, institute
State pelletizer discharging opening and connect described rotary hearth furnace feeding mouth.
3. according to claim 1 system it is characterised in that described rotary hearth furnace further includes barricade, described barricade is vertical
It is fixed in the body of heater of described rotary hearth furnace, described barricade is located between described head end and described tail end, by described head end, described tail
End separates.
4. according to claim 3 system it is characterised in that reducing zone 10～20cm described in described barricade distance from bottom.
5. according to claim 1 system it is characterised in that the upper surface rotation direction of described prereduction layer and described reduction
The rotation direction of layer is contrary.
6. a kind of arbitrary described system of utilization claim 1～5 processes the method for copper ashes it is characterised in that including step：
A, by 100 parts of copper ashes, 20～30 parts of reducing agents, 5～10 parts of additive fine grindings, then with 5～10 parts of binding agents mix to be made
Ball, obtains pelletizing；
B, the described pelletizing described rotary hearth furnace of feeding is carried out prereduction and drastic reduction, obtain metallized pellet, collect rotary hearth furnace
The flue gas discharged obtains zinc-rich dust；
C, described metallized pellet is sent into combustion gas with addition of quick lime melt refine after the fusing of point stove, obtain molten iron, described metallization
Pelletizing and mass ratio=1 of quick lime:0.05～0.1.
7. method according to claim 6 is it is characterised in that described copper ashes, reducing agent, additive after fine grinding in step A
The mass percent of middle granularity≤200 mesh is more than 85%.
8. method according to claim 6 it is characterised in that in described reducing agent the quality of carbon be divided into and be not less than 80%；
Described additive is one or more of limestone, slaked lime, sodium carbonate；Described binding agent is starch solution.
9. method according to claim 6 it is characterised in that in rotary hearth furnace described in step B temperature be 1200～1350
DEG C, it is 20～50min that described prereduction layer rotates week age, and it is 30～60min that described reducing zone rotates week age.
10. method according to claim 6 is it is characterised in that refining time described in step C is 0.5～1h.
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| CN201611028955.3A CN106435204A (en) | 2016-11-22 | 2016-11-22 | System and method for treating copper slag through fuel gas melt separation |
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| CN201611028955.3A CN106435204A (en) | 2016-11-22 | 2016-11-22 | System and method for treating copper slag through fuel gas melt separation |
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| CN201611028955.3A Pending CN106435204A (en) | 2016-11-22 | 2016-11-22 | System and method for treating copper slag through fuel gas melt separation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338339A (en) * | 2017-06-30 | 2017-11-10 | 江苏省冶金设计院有限公司 | A kind of system and method for handling copper ashes |
| CN108004365A (en) * | 2018-01-22 | 2018-05-08 | 山东钢铁股份有限公司 | A kind of bicyclic parallel rotary hearth furnace and pelletizing production technique |
Citations (4)
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| CN104928428A (en) * | 2015-04-27 | 2015-09-23 | 钢铁研究总院 | Pulverized coal melt separation and recovery method for low-grade iron resources |
| CN206143283U (en) * | 2016-11-22 | 2017-05-03 | 江苏省冶金设计院有限公司 | System for branch processing copper ashes is melted in gas |
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2016
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| US4970970A (en) * | 1989-06-26 | 1990-11-20 | Avery Solid Waste Incineration Co. | Drying and burning incinerator for trash |
| CN103627835A (en) * | 2013-11-12 | 2014-03-12 | 金川集团股份有限公司 | Method for treating nickel smelting furnace slag |
| CN104928428A (en) * | 2015-04-27 | 2015-09-23 | 钢铁研究总院 | Pulverized coal melt separation and recovery method for low-grade iron resources |
| CN206143283U (en) * | 2016-11-22 | 2017-05-03 | 江苏省冶金设计院有限公司 | System for branch processing copper ashes is melted in gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107338339A (en) * | 2017-06-30 | 2017-11-10 | 江苏省冶金设计院有限公司 | A kind of system and method for handling copper ashes |
| CN108004365A (en) * | 2018-01-22 | 2018-05-08 | 山东钢铁股份有限公司 | A kind of bicyclic parallel rotary hearth furnace and pelletizing production technique |
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