CN106367608B - A kind of system and method for mill ore magnetic selection processing copper ashes - Google Patents
A kind of system and method for mill ore magnetic selection processing copper ashes Download PDFInfo
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- CN106367608B CN106367608B CN201611031758.7A CN201611031758A CN106367608B CN 106367608 B CN106367608 B CN 106367608B CN 201611031758 A CN201611031758 A CN 201611031758A CN 106367608 B CN106367608 B CN 106367608B
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- rotary hearth
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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
-
- 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
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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
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
- C21B13/146—Multi-step reduction without melting
-
- 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
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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
- C22B1/248—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
- C22B19/30—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
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The present invention discloses a kind of system and method for mill ore magnetic selection processing copper ashes.The system includes rotary hearth furnace and mill ore magnetic selection equipment, the rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet, prereduction layer and reducing zone, the prereduction layer is arranged in the body of heater of the rotary hearth furnace, positioned at the top of the reducing zone, the prereduction layer is open loop structure, provided with head end and tail end, is provided with gap between the head end and the tail end in the horizontal direction, the reducing zone is formed by refractory material laying, is laid on the furnace bottom of the rotary hearth furnace.The system and method for the mill ore magnetic selection processing copper ashes of the present invention, carry out the prereduction and reduction of pelletizing, reduction effect is good in rotary hearth furnace；Flue gas caused by collection obtains zinc-rich dust, realizes that iron in copper ashes, zinc synchronously reclaim；Simple system, the treating capacity of rotary hearth furnace are big.
Description
Technical field
The invention belongs to twice laid field, more particularly to a kind of system and method for mill ore magnetic selection processing copper ashes.
Background technology
Precious Metals Resources are rare, expensive, are increasingly by the most attention of countries in the world, noble metal industrial waste
Expensive heavy secondary resource in world today's Precious Metals Resources increasingly in short supply, these industrial wastes are effectively handled and sharp
With having considerable economic value.
Copper ashes is caused slag during copper metallurgy, belongs to one kind of non-ferrous metal slag.Using the useless of reflection oven process copper metallurgy discharge
Slag is reverberatory furnace copper ashes, use blast furnace copper metallurgy discharge for blast furnace copper ashes.The copper yield in China has occupied the first in the world,
In the production process of copper, substantial amounts of copper ashes is generated, copper ashes heap has slag field, not only land occupation but also has polluted environment, has even more provided
The huge waste in source.Containing substantial amounts of available resource in copper ashes, the chemical composition of copper ashes is SiO2：30~40%, Fe：27
~35%, Zn：2~3%.
The utilization technology of copper ashes mainly includes three kinds of beneficiating method, pyrogenic process and wet method.Beneficiating method processing copper ashes can reclaim
Certain iron ore concentrate, but gained iron concentrate grade is low, and most tailings can not utilize, and overall recycling level is low.Fire
The shortcomings of method handles copper ashes due to high-temperature process high energy consumption, complex process equipment, and operating cost is high.In wet-treating copper ashes flow
It is related to substantial amounts of acid-base solution, secondary pollution is present, environmentally friendly cost is high.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of system and method for mill ore magnetic selection processing copper ashes, by copper ashes system
Prereduction is carried out in rotary hearth furnace prereduction layer after standby pelletizing, reducing zone is entered back into and is reduced, reduction effect is good, pelletizing metallization
Rate is high, and Iron concentrate grade is high after mill choosing, collects flue gas caused by rotary hearth furnace and obtains zinc-rich powder, realizes iron, the zinc recovering in copper ashes,
Treating capacity is high.
An object of the present invention is to provide a kind of system of mill ore magnetic selection processing copper ashes, including：Rotary hearth furnace and ore grinding magnetic
Optional equipment,
The rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet, prereduction layer and reducing zone,
The prereduction layer is arranged in the body of heater of the rotary hearth furnace, positioned at the top of the reducing zone, the prereduction
Layer is open loop structure, provided with head end and tail end, is provided with gap, the reduction between the head end and the tail end in the horizontal direction
Layer is formed by refractory material laying, is laid on the furnace bottom of the rotary hearth furnace；
The mill ore magnetic selection equipment includes feeding mouth；
The rotary hearth furnace discharging opening connects the mill ore magnetic selection equipment feeding mouth.
Rotary hearth furnace is used for the prereduction and reduction of pelletizing, and the pelletizing reduction effect handled by rotary hearth furnace is good.Mill ore magnetic selection
Equipment is used for the fine grinding and magnetic separation of metallized pellet, obtains product.
As preferable scheme, rotary hearth furnace feeding mouth is arranged on the top furnace roof of prereduction layer head end, is easy to material
Into.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, the system further comprises atomizer mill, damp mill and pelletizer, and the atomizer mill includes feeding mouth
And discharging opening, the damp mill include feeding mouth and discharging opening, the pelletizer includes feeding mouth and discharging opening；The atomizer mill
Discharging opening connects the damp mill feeding mouth, and the damp mill discharging opening connects the pelletizer feeding mouth, and the pelletizer goes out
Material mouth connects the rotary hearth furnace feeding mouth.
Atomizer mill is used to for copper ashes, reducing agent, additive to be finely ground to the granularity needed for subsequent treatment.Damp mill is used for will be thin
Compound after mill is well mixed after adding binding agent.Pelletizer is used for the compound pelletizing of mixing.
As preferred embodiment, the rotary hearth furnace further comprises barricade, and the barricade is fixed on described turn vertically
In the body of heater of bottom stove, the barricade separates the head end, the tail end between the head end and the tail end.Barricade
It is arranged among head end and tail end, can prevents the pelletizing that prereduction layer is fallen from falling near discharging opening, prevents pelletizing from not gone back
Former just discharge rotary hearth furnace.
Specifically, 10~20cm of reducing zone described in the barricade distance from bottom.
Further, the upper surface rotation direction of the prereduction layer is opposite with the rotation direction of the reducing zone.It is pre- to go back
The upper surface rotation direction of former layer is opposite with the rotation direction of the reducing zone so that fortune of the material in prereduction layer and reducing zone
It is 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 copper ashes is handled using said system, comprise the following steps：
A, by 100 parts of copper ashes, 20~30 parts of reducing agents, 5~10 parts of additive fine grindings, then mixed with 5~10 parts of binding agents
Even pelletizing, obtain pelletizing；
B, the pelletizing is sent into the rotary hearth furnace and carries out prereduction and drastic reduction, obtain metallized pellet, collected and turn
The flue gas that bottom fire grate goes out obtains zinc-rich dust；
C, the metallized pellet is crushed, mill ore magnetic selection obtains Iron concentrate.
In the present invention, the mass percent of the mesh of granularity in the copper ashes, reducing agent, additive after fine grinding in step A≤200
More than 85%.
Specifically, the quality of carbon is divided into not less than 80% in the reducing agent；The additive be lime stone, calcium hydroxide,
One or more in sodium carbonate；The binding agent is starch solution.
Further, temperature is 1200~1350 DEG C in rotary hearth furnace described in step B, when the prereduction layer rotates one week
Between be 20~50min, it is 30~60min that the reducing zone, which rotates week age,.
In the present invention, by the metallized pellet water quenching in step C, the mass percent for being finely ground to the mesh of granularity≤200 exists
More than 80%, carry out magnetic separation in 600~1500Oe of magnetic field intensity.
The system and method for the mill ore magnetic selection processing copper ashes of the present invention, turn bottom by being sent to after copper ashes and dispensing making pelletizing
Stove, rotary hearth furnace prereduction layer by prereduction, enter back into reducing zone reduction, reduction effect is good, and Iron concentrate grade is high after mill choosing；
Prereduction layer makes full use of reducing zone fume afterheat, reduces energy consumption；Flue gas caused by collection obtains zinc-rich dust, realizes in copper ashes
Iron, zinc synchronously reclaim.
Brief description of the drawings
Fig. 1 is the system schematic of mill ore magnetic selection processing copper ashes 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 processing copper ashes of the present invention.
In figure：
1- atomizer mills；2- damp mills；3- pelletizers；4- rotary hearth furnaces；
401- rotary hearth furnace feeding mouths；402- rotary hearth furnace discharging openings；403- exhanst gas outlets；
404- prereduction layers；405- reducing zones；406- barricades；
5- mill ore magnetic selection equipment.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only, rather than limitation of the present invention.
As shown in figure 1, the present invention provides a kind of system of mill ore magnetic selection processing copper ashes, including：Atomizer mill 1, damp mill 2,
Pelletizer 3, rotary hearth furnace 4 and mill ore magnetic selection equipment 5.
Atomizer mill 1 includes feeding mouth and discharging opening.Atomizer mill 1 is used to copper ashes and dispensing being finely ground to needed for subsequent treatment
Granularity.
Damp mill 2 includes feeding mouth and discharging opening.Damp mill 2 is used to after the compound after fine grinding is added into binding agent mix
Uniformly.
Pelletizer 3 includes feeding mouth and discharging opening.Pelletizer 3 is used for the compound pelletizing of mixing.Spherical material is more
Beneficial to the thermally equivalent in rotary hearth furnace 4.Suitable pellet size makes pelletizing heat transfer good, reaches good reduction effect.
Rotary hearth furnace 4 is used for the prereduction and reduction of pelletizing.
Mill ore magnetic selection equipment 5 includes feeding mouth and discharging opening.Mill ore magnetic selection equipment 5 is used for the ore grinding and magnetic of metallized pellet
Choosing, obtain product.
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 forms 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, 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 sets multiple chassis, forms the chassis chain of head and the tail connection, chassis chain can move along the surface of support, by installed in support
On power set driving.
As preferable scheme, rotary hearth furnace feeding mouth 401 is arranged on the top furnace roof of the head end of prereduction layer 404, is easy to
The entrance of material.The lower section of rotary hearth furnace feeding mouth 401 sets chute, after being entered so as to pelletizing 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 the head end of prereduction layer 404, reducing zone
405 top, it is easy to the discharge of material.The flue gas that the exhanst gas outlet 403 of rotary hearth furnace is used to collect the discharge of rotary hearth furnace 4 obtains zinc-rich
Dust.
The barricade 406 of rotary hearth furnace is fixed in the body of heater of rotary hearth furnace 4 vertically, connect the lateral wall of rotary hearth furnace, madial wall and
Furnace roof.Barricade 406 separates head end, tail end between head end and tail end.Barricade 406 is arranged among head end and tail end, can
To prevent the pelletizing that prereduction layer 404 is fallen from falling near discharging opening 402, pelletizing is prevented not to be reduced just discharge rotary hearth furnace.
As preferred embodiment, the distance of the bottom of barricade 406 and the upper surface of reducing zone 405 is 10~20cm.
Rotary hearth furnace 4 provides heat using regenerative gas burner.Regenerative gas burner is installed on rotary hearth furnace both sides
In side wall, above the lower section of prereduction layer 404, reducing zone 405.
The discharging opening of atomizer mill 1 connects the feeding mouth of damp mill 2, the discharging opening of the damp mill 2 connection feeding mouth of pelletizer 3, pelletizer 3
Discharging opening connection rotary hearth furnace feeding mouth 401, rotary hearth furnace discharging opening 402 connects the feeding mouth of mill ore magnetic selection equipment 5.
Further, the upper surface rotation direction of prereduction layer 404 is opposite with the rotation direction of reducing zone 405.Fig. 1 and figure
In 2, single arrow dotted lines represent the direction of rotation of prereduction layer 404, and dashed double represents the direction of rotation of reducing zone 405.Prereduction
The upper surface rotation direction of layer 404 is opposite with the rotation direction of reducing zone 405 so that material is in prereduction layer 404 and reducing zone
405 direction of motion is on the contrary, improve the reduction effect of material.
The embodiment of the present invention, first by copper ashes and the finely ground fine grinding of machine 1 of dispensing, then material is sent into damp mill 2, added
Enter binding agent to be well mixed, afterwards handle material through pelletizer 3, obtain pelletizing.Pelletizing is sent into by rotary hearth furnace feeding mouth 401
Rotary hearth furnace, fall the head end in prereduction layer 404 along chute, then pelletizing is rotated to the tail end of prereduction layer 404, is fallen in reducing zone
On 405.Pelletizing rotates a circle in reducing zone, obtains metallized pellet, is discharged through rotary hearth furnace discharging opening 402.Collect in rotary hearth furnace 4
Flue gas obtain zinc-rich powder.Metallized pellet handles through mill ore magnetic selection equipment 5 and obtains Iron concentrate.
On the other hand, as shown in figure 3, the embodiment of the present invention provides a kind of method that copper ashes is handled using said system, 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 mixed with 5~10 parts of binding agents
Even pelletizing, obtain pelletizing；
B, the pelletizing is sent into the rotary hearth furnace and carries out prereduction and drastic reduction, obtain metallized pellet, collected and turn
The flue gas that bottom fire grate goes out obtains zinc-rich dust；
C, the metallized pellet is crushed, mill ore magnetic selection obtains Iron concentrate.
In the embodiment of the present invention, the quality of the mesh of granularity in the copper ashes, reducing agent, additive after fine grinding in step A≤200
Percentage is more than 85%.
Specifically, the quality of carbon is divided into not less than 80% in the reducing agent；The additive be lime stone, calcium hydroxide,
One or more in sodium carbonate；The binding agent is starch solution.
Further, temperature is 1200~1350 DEG C in rotary hearth furnace described in step B, when the prereduction layer rotates one week
Between be 20~50min, it is 30~60min that the reducing zone, which rotates week age,.
In the embodiment of the present invention, by the metallized pellet water quenching in step C, the quality hundred of the mesh of granularity≤200 is finely ground to
Divide ratio more than 80%, magnetic separation is carried out in 600~1500Oe of magnetic field intensity.
The system and method for the mill ore magnetic selection processing copper ashes of the present invention, turn bottom by being sent to after copper ashes and dispensing making pelletizing
Stove, prereduction and reduction are carried out in rotary hearth furnace, reduction effect is good, and Iron concentrate grade is high after mill choosing；Prereduction layer can be fully sharp
With reducing zone fume afterheat, energy consumption is reduced；Flue gas caused by collection obtains zinc-rich dust, realizes that iron in copper ashes, zinc synchronously reclaim；
Simple system, the treating capacity of rotary hearth furnace are big.
Embodiment 1
By 100 parts of copper ashes, 20 parts of reduction coal (C mass components：82.06%), 8 parts of additives (lime stone) are finely ground to grain
The granular mass accounting 86.35% of≤200 mesh is spent, and 5 parts of binding agents mix pelletizing, enter from rotary hearth furnace feeding mouth, rotary hearth furnace
1280 DEG C of reduction temperature, prereduction layer rotate week age 35min, and reducing zone rotates week age 45min, and pelletizing passes through respectively
Prereduction layer and reducing zone are discharged from rotary hearth furnace discharging opening, and the flue gas for collecting rotary hearth furnace discharge obtains zinc-rich dust, by rotary hearth furnace
The metallized pellet water quenching of discharge is broken, the levigate granularity quality accounting 81.36% to the mesh of granularity≤200, in magnetic field intensity
1500Oe magnetic separation obtains Iron concentrate.
Embodiment 2
By 100 parts of copper ashes, 30 parts of reduction coal (C mass components：81.58%), 5 parts of additives (lime stone) are finely ground to grain
The granular mass accounting 88.59% of≤200 mesh is spent, and 10 parts of binding agents mix pelletizing, enter from rotary hearth furnace feeding mouth, rotary hearth furnace
1200 DEG C of reduction temperature, prereduction layer rotate week age 20min, and reducing zone rotates week age 60min, and pelletizing passes through respectively
Prereduction layer and reducing zone are discharged from rotary hearth furnace discharging opening, and the flue gas for collecting rotary hearth furnace discharge obtains zinc-rich dust, by rotary hearth furnace
The metallized pellet water quenching of discharge is broken, the levigate granularity quality accounting 82.38% to the mesh of granularity≤200, in magnetic field intensity
1000Oe magnetic separation obtains Iron concentrate.
Embodiment 3
By 100 parts of copper ashes, 25 parts of reduction coal (C mass components：83.58%), 10 parts of additives (lime stone) are finely ground to
The granular mass accounting 87.49% of the mesh of granularity≤200, and 8 parts of binding agents mix pelletizings, enter from rotary hearth furnace feeding mouth, turn bottom
1350 DEG C of stove reduction temperature, prereduction layer rotate week age 50min, and reducing zone rotates week age 30min, and pelletizing passes through respectively
Cross prereduction layer and reducing zone to discharge from rotary hearth furnace discharging opening, the flue gas for collecting rotary hearth furnace discharge obtains zinc-rich dust, will turn bottom
Metallized pellet water quenching that fire grate goes out is broken, the levigate granularity quality accounting 82.35% to the mesh of granularity≤200, in magnetic field intensity
600Oe magnetic separation obtains Iron concentrate.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this to illustrate rather than
The scope of invention, it will be understood by those within the art that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent substitution that the present invention is carried out, all should cover within the scope of the present invention.It is in addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can combine any other embodiment all or part of use.
Claims (10)
1. a kind of system of mill ore magnetic selection processing copper ashes, including：Rotary hearth furnace and mill ore magnetic selection equipment,
The rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet, prereduction layer and reducing zone,
The prereduction layer is arranged in the body of heater of the rotary hearth furnace, and positioned at the top of the reducing zone, the prereduction layer is
Open loop structure, provided with head end and tail end, gap is provided between the head end and the tail end in the horizontal direction,
The reducing zone is formed by refractory material laying, is laid on the furnace bottom of the rotary hearth furnace；
The mill ore magnetic selection equipment includes feeding mouth；
The rotary hearth furnace discharging opening connects the mill ore magnetic selection equipment feeding mouth.
2. system according to claim 1, it is characterised in that the system further comprises atomizer mill, damp mill and pelletizing
Machine, the atomizer mill include feeding mouth and discharging opening, and the damp mill includes feeding mouth and discharging opening, the pelletizer include into
Material mouth and discharging opening；The atomizer mill discharging opening connects the damp mill feeding mouth, is made described in the damp mill discharging opening connection
Ball machine feeding mouth, the pelletizer discharging opening connect the rotary hearth furnace feeding mouth.
3. system according to claim 1, it is characterised in that the rotary hearth furnace further comprises barricade, and the barricade is vertical
It is fixed in the body of heater of the rotary hearth furnace, the barricade is between the head end and the tail end, by the head end, the tail
End separates.
4. system according to claim 3, it is characterised in that 10~20cm of reducing zone described in the barricade distance from bottom.
5. system according to claim 1, it is characterised in that the upper surface rotation direction of the prereduction layer and the reduction
The rotation direction of layer is opposite.
A kind of 6. method for handling copper ashes using any system of Claims 1 to 55, 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 mix and make with 5~10 parts of binding agents
Ball, obtain pelletizing；
B, the pelletizing is sent into the rotary hearth furnace and carries out prereduction and drastic reduction, obtain metallized pellet, collect rotary hearth furnace
The flue gas of discharge obtains zinc-rich dust；
C, the metallized pellet is crushed, mill ore magnetic selection obtains Iron concentrate.
7. according to the method for claim 6, it is characterised in that the copper ashes, reducing agent, additive after fine grinding in step A
The mass percent of the mesh of middle granularity≤200 is more than 85%.
8. according to the method for claim 6, it is characterised in that the quality of carbon is divided into not less than 80% in the reducing agent；
The additive is the one or more in lime stone, calcium hydroxide, sodium carbonate；The binding agent is starch solution.
9. according to the method for claim 6, it is characterised in that temperature is 1200~1350 in rotary hearth furnace described in step B
DEG C, it is 20~50min that the prereduction layer, which rotates week age, and it is 30~60min that the reducing zone, which rotates week age,.
10. according to the method for claim 6, it is characterised in that by the metallized pellet water quenching in step C, be finely ground to
The mass percent of the mesh of granularity≤200 carries out magnetic separation more than 80%, in 600~1500Oe of magnetic field intensity.
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| CN201611031758.7A CN106367608B (en) | 2016-11-22 | 2016-11-22 | A kind of system and method for mill ore magnetic selection processing copper ashes |
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| CN201611031758.7A CN106367608B (en) | 2016-11-22 | 2016-11-22 | A kind of system and method for mill ore magnetic selection processing copper ashes |
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| JP2001123211A (en) * | 1999-10-22 | 2001-05-08 | Nippon Steel Corp | Reducing method of metallic oxide and apparatus thereof |
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| CN204574771U (en) * | 2015-04-20 | 2015-08-19 | 安徽省六安市佳瑞粉末冶金有限公司 | A kind of vertical sponge iron sintering equipment |
| 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 |
| CN206256138U (en) * | 2016-11-22 | 2017-06-16 | 江苏省冶金设计院有限公司 | The system that a kind of mill ore magnetic selection processes copper ashes |
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