CN106367608A - System and method for treating copper slag through ore grinding and magnetic separation - Google Patents
System and method for treating copper slag through ore grinding and magnetic separation Download PDFInfo
- Publication number
- CN106367608A CN106367608A CN201611031758.7A CN201611031758A CN106367608A CN 106367608 A CN106367608 A CN 106367608A CN 201611031758 A CN201611031758 A CN 201611031758A CN 106367608 A CN106367608 A CN 106367608A
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- Prior art keywords
- rotary hearth
- hearth furnace
- mill
- discharging opening
- feeding mouth
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Classifications
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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
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a system and method for treating copper slag through ore grinding and magnetic separation. The system comprises a rotary hearth furnace and ore grinding and magnetic separation equipment. The rotary hearth furnace comprises a feed inlet, a discharge outlet, an exhaust gas outlet, a pre-reduction layer and a reduction layer, wherein the pre-reduction layer is installed in a furnace body of the rotary hearth furnace and located above the reduction layer; the pre-reduction layer is of an open loop structure and is provided with a head end and a tail end, and a gap is reserved between the head end and the tail end in the horizontal direction; and the reduction layer is formed by building refractory materials and laid on the bottom of the rotary hearth furnace. According to the system and method for treating copper slag through ore grinding and magnetic separation, pre-reduction and reduction of pellets are carried out in the rotary hearth furnace, and the reduction effect is good; zinc-rich dust is obtained by collecting generated exhaust gas, and iron and zinc in copper slag are recovered simultaneously; and the system is simple, and the treatment capacity of the rotary hearth furnace is high.
Description
Technical field
The invention belongs to twice laid field, the system and method that more particularly, to a kind of mill ore magnetic selection processes copper ashes.
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
In order to solve the above problems, the present invention proposes the system and method that a kind of mill ore magnetic selection processes copper ashes, by copper ashes system
Carry out prereduction in rotary hearth furnace prereduction layer after standby pelletizing, enter back into reducing zone and reduced, reduction effect is good, pelletizing metallizes
Rate is high, and after mill choosing, Haematite grade powder is high, collects the flue gas that rotary hearth furnace produces and obtains zinc-rich powder, realizes ferrum in copper ashes, zinc recovering,
Treating capacity is high.
An object of the present invention is the system providing a kind of mill ore magnetic selection to process copper ashes, comprising: rotary hearth furnace and ore grinding magnetic
Optional equipment,
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 reduction
Layer is formed by refractory material laying, is laid on the furnace bottom of described rotary hearth furnace；
Described mill ore magnetic selection equipment includes feeding mouth；
Described rotary hearth furnace discharging opening connects described mill ore magnetic selection equipment feeding mouth.
Rotary hearth furnace is used for prereduction and the reduction of pelletizing, and the pelletizing reduction effect processing through rotary hearth furnace is good.Mill ore magnetic selection
Equipment is used for fine grinding and the magnetic separation of metallized pellet, obtains product.
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 feeding mouth
And discharging opening, described damp mill includes feeding mouth and discharging opening, and described pelletizer includes feeding mouth and discharging opening；Described atomizer mill
Discharging opening connects described damp mill feeding mouth, and described damp mill discharging opening connects described pelletizer feeding mouth, and described pelletizer goes out
Material mouth connects described 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 mix homogeneously after binding agent.Pelletizer is used for the compound pelletizing that will mix.
As preferred embodiment, described rotary hearth furnace further includes barricade, and described barricade is vertically fixed on described turning
In the body of heater of bottom stove, described barricade is located between described head end and described tail end, and described head end, described tail end are separated.Barricade
It is arranged in the middle of head end and tail end, can prevent the pelletizing that prereduction layer falls from falling near discharging opening, prevent pelletizing from not gone back
Former just discharge rotary hearth furnace.
Specifically, reducing zone 10～20cm described in described barricade distance from bottom.
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, by described metallized pellet crush, mill ore magnetic selection obtain Iron concentrate.
In the present invention, the mass percent of granularity≤200 mesh in described copper ashes after fine grinding in step a, reducing agent, additive
More than 85%.
Specifically, in described reducing agent, the quality of carbon is divided into and is not less than 80%；Described additive be limestone, slaked lime,
One or more of sodium carbonate；Described binding agent is starch solution.
Further, in rotary hearth furnace described in step b, temperature is 1200～1350 DEG C, when described prereduction layer rotates one week
Between be 20～50min, it is 30～60min that described reducing zone rotates week age.
In the present invention, by described metallized pellet water quenching in step c, the mass percent being finely ground to granularity≤200 mesh exists
More than 80%, carry out magnetic separation in magnetic field intensity 600～1500oe.
The system and method that the mill ore magnetic selection of the present invention processes copper ashes, turn bottom by sending 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, after mill choosing, Haematite grade powder is high；
Prereduction layer makes full use of reducing zone fume afterheat, reducing energy consumption；Collect the flue gas producing and obtain zinc-rich dust, realize in copper ashes
Ferrum, zinc synchronously reclaim.
Brief description
Fig. 1 is the system schematic that mill ore magnetic selection of the present invention processes copper ashes；
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；
5- mill ore magnetic selection equipment.
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, the present invention provides a kind of mill ore magnetic selection to process the system of copper ashes, comprising: 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 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 mixing after binding agent
Uniformly.
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.
Mill ore magnetic selection equipment 5 includes feeding mouth and discharging opening.Mill ore magnetic selection equipment 5 is used for ore grinding and the magnetic of metallized pellet
Choosing, obtains 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 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 mill ore magnetic selection equipment 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 processes 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 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, by described metallized pellet crush, mill ore magnetic selection obtain Iron concentrate.
In the embodiment of the present invention, 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%.
Specifically, in described reducing agent, the quality of carbon is divided into and is not less than 80%；Described additive be limestone, slaked lime,
One or more of sodium carbonate；Described binding agent is starch solution.
Further, in rotary hearth furnace described in step b, temperature is 1200～1350 DEG C, when described prereduction layer rotates one week
Between be 20～50min, it is 30～60min that described reducing zone rotates week age.
In the embodiment of the present invention, by described metallized pellet water quenching in step c, it is finely ground to the quality hundred of granularity≤200 mesh
Divide ratio more than 80%, carry out magnetic separation in magnetic field intensity 600～1500oe.
The system and method that the mill ore magnetic selection of the present invention processes copper ashes, turn bottom by sending to after copper ashes and dispensing making pelletizing
Stove, carries out prereduction and reduction in rotary hearth furnace, and reduction effect is good, and after mill choosing, Haematite grade powder is high；Prereduction layer can be fully sharp
Use reducing zone fume afterheat, reducing energy consumption；Collect the flue gas producing and obtain zinc-rich dust, realize ferrum in copper ashes, zinc synchronously reclaims；
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 component of c: 82.06%), 8 parts of additives (limestone) be finely ground to grain
The granular mass accounting 86.35% of degree≤200 mesh, and 5 parts of binding agents mixing pelletizings, enter from rotary hearth furnace feeding mouth, rotary hearth furnace
1280 DEG C of reduction temperature, prereduction layer rotate week age 35min, reducing zone rotate week age 45min, pelletizing respectively through
Prereduction layer and reducing zone are discharged from rotary hearth furnace discharging opening, collect the flue gas acquisition zinc-rich dust that rotary hearth furnace is discharged, by rotary hearth furnace
The metallized pellet water quenching discharged crushes, the levigate granularity quality accounting 81.36% to granularity≤200 mesh, in magnetic field intensity
1500oe magnetic separation obtains Iron concentrate.
Embodiment 2
By 100 parts of copper ashes, 30 parts of reduction coal (mass component of c: 81.58%), 5 parts of additives (limestone) be finely ground to grain
The granular mass accounting 88.59% of degree≤200 mesh, and 10 parts of binding agents mixing pelletizings, enter from rotary hearth furnace feeding mouth, rotary hearth furnace
1200 DEG C of reduction temperature, prereduction layer rotate week age 20min, reducing zone rotate week age 60min, pelletizing respectively through
Prereduction layer and reducing zone are discharged from rotary hearth furnace discharging opening, collect the flue gas acquisition zinc-rich dust that rotary hearth furnace is discharged, by rotary hearth furnace
The metallized pellet water quenching discharged crushes, the levigate granularity quality accounting 82.38% to granularity≤200 mesh, in magnetic field intensity
1000oe magnetic separation obtains Iron concentrate.
Embodiment 3
By 100 parts of copper ashes, 25 parts of reduction coal (mass component of c: 83.58%), 10 parts of additives (limestone) are finely ground to
The granular mass accounting 87.49% of granularity≤200 mesh, and 8 parts of binding agents mixing pelletizings, enter from rotary hearth furnace feeding mouth, turn bottom
1350 DEG C of stove reduction temperature, prereduction layer rotates week age 50min, and reducing zone rotates week age 30min, pelletizing warp respectively
Cross prereduction layer and reducing zone to discharge from rotary hearth furnace discharging opening, collect the flue gas acquisition zinc-rich dust that rotary hearth furnace is discharged, bottom will be turned
The metallized pellet water quenching that fire grate goes out crushes, the levigate granularity quality accounting 82.35% to granularity≤200 mesh, 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 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. a kind of mill ore magnetic selection processes the system of copper ashes, comprising: rotary hearth furnace and mill ore magnetic selection equipment,
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 is formed by refractory material laying, is laid on the furnace bottom of described rotary hearth furnace；
Described mill ore magnetic selection equipment includes feeding mouth；
Described rotary hearth furnace discharging opening connects described mill ore magnetic selection equipment 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 feeding mouth and discharging opening, and described damp mill includes feeding mouth and discharging opening, described pelletizer include into
Material mouth and discharging opening；Described atomizer mill discharging opening connects described damp mill feeding mouth, makes described in described damp mill discharging opening connection
Ball machine feeding mouth, described pelletizer discharging opening connects 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, by described metallized pellet crush, mill ore magnetic selection obtain Iron concentrate.
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 by described metallized pellet water quenching in step c, be finely ground to
The mass percent of granularity≤200 mesh, more than 80%, carries out magnetic separation in magnetic field intensity 600～1500oe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN106367608A true CN106367608A (en) | 2017-02-01 |
| CN106367608B CN106367608B (en) | 2018-02-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001123211A (en) * | 1999-10-22 | 2001-05-08 | Nippon Steel Corp | Reducing method of metallic oxide and apparatus thereof |
| 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 |
-
2016
- 2016-11-22 CN CN201611031758.7A patent/CN106367608B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001123211A (en) * | 1999-10-22 | 2001-05-08 | Nippon Steel Corp | Reducing method of metallic oxide and apparatus thereof |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 范兴祥等: ""红土镍矿转底炉预还原−电炉熔分制取镍铁合金"", 《中南大学学报(自然科学版)》 * |
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| CN106367608B (en) | 2018-02-09 |
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