CN206069973U - A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system - Google Patents
A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system Download PDFInfo
- Publication number
- CN206069973U CN206069973U CN201621051881.0U CN201621051881U CN206069973U CN 206069973 U CN206069973 U CN 206069973U CN 201621051881 U CN201621051881 U CN 201621051881U CN 206069973 U CN206069973 U CN 206069973U
- Authority
- CN
- China
- Prior art keywords
- pyrolysis
- rotary hearth
- outlet
- zone
- hearth furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
This utility model is related to chemical industry metallurgical field, and in particular to the system of a kind of utilization lateritic nickel ore pyrolysis and reduction reaction.Process for existing rotary hearth furnace do not account for the petroleum resources in reduction coal being reclaimed in Direct Reduction in lateritic nickel ore technology, the utility model proposes a kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system and method, pyrolysis and the reduction melting production ferronickel powder of lateritic nickel ore of coal during lateritic nickel ore coal-based direct reduction are realized.Semicoke after being pyrolyzed in the system continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace and obtains metallized pellet.The system can realize the pyrolysis of coal in lateritic nickel ore Direct Reduction, reclaimed the petroleum resources of preciousness, increased the side-product of rotary hearth furnace coal-based DR process, and, the fume afterheat that furnace interior is produced effectively can be recycled, so as to realizing environmental protection, reducing indirectly process energy consumption and cost.
Description
Technical field
This utility model is related to chemical industry metallurgical field.Specifically, this utility model is related to a kind of using lateritic nickel ore heat
The system of solution and reduction reaction.
Background technology
In recent years, with high-grade nickel sulfide ore exhausted and domestic rustless steel industry fast development, low-grade laterite
Nickel minerals has become the primary raw material of production ferro-nickel product.In order to solve the Rational Utilization of lateritic nickel ore, with lateritic nickel ore
For raw material, coal dust is reducing agent, and the ferrum and nickel in Ore has been reduced into metallic iron and metallic nickel, then Jing using direct-reduction process
Superfusion point or mill choosing make nickel be enriched in ferro-nickel product.
Now, coal-based DR process has various, wherein, as rotary hearth furnace reduction technique has, equipment is simple, operation
Easily, with short production cycle, response speed is fast, advantages of environment protection, so rotary hearth furnace reduction technique has been caused widely
Concern.The ultimate principle of rotary hearth iron making is burnt by the flat flame burner positioned at furnace sidewall, and the high temperature of flame is passed by radiating
The pelletizing of feed layer surface, makes the metal-oxide in carbonaceous pelletizing be reduced at high temperature, more than heating energy source using natural gas,
Cracked gas, coke-stove gas, coal gas of converter and coal gas etc., energy sources is quite varied.Using rotary hearth furnace equipment DRI
(DRI) technique is mainly included the following steps that：Iron Ore Powder is mixed homogeneously with reducing agent coal dust, carbonaceous pelletizing ore deposit is pressed into, is dried；
Dry carbonaceous pelletizing is equably layered on rotary hearth furnace, (temperature is reachable to make reduced zone of the carbonaceous pelletizing in rotary hearth furnace
1300 DEG C～1400 DEG C) in be reduced 15min-30min, you can obtain the metallized pellet that degree of metalization is more than 85%.Turn
It is that reduction temperature is high, the transfixion that the time is short, furnace charge is relative with furnace bottom holding that bottom furnace apparatus are used to produce the advantage of DRI,
The problems such as so as to avoid rotary kiln, fluid bed bonding, shaft furnace dross.Chinese patent CN 102212636A disclose a kind of red
The iron smelting method that point stove melts point is melted in native nickel minerals rotary hearth furnace coal-based direct reduction-combustion gas, and lateritic nickel ore is mixed with coal and flux
Pelletizing afterwards, dry bulb are distributed in rotary hearth furnace and carry out direct-reduction and obtain metallized pellet, and metallized pellet feeding coal gas makees fuel
Molten point of stove of regenerative gas carry out molten point, finally give nickelic dilval.
But, existing rotary hearth furnace yet suffers from some problems in processing lateritic nickel ore technology.Reduction coal dust is in lateritic nickel ore
It is only to serve reduction mineral and a part of effect for supplying heat, the oil gas of itself preciousness in rotary hearth furnace Direct Reduction
Resource does not obtain more efficiently utilization.Therefore, existing rotary hearth furnace processes lateritic nickel ore technology and is further improved.
Utility model content
Process for existing rotary hearth furnace and do not account for reclaiming in reduction coal in Direct Reduction in lateritic nickel ore technology
Petroleum resources, the utility model proposes the pyrolysis and reduction of a kind of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group
Response system and method, realize the pyrolysis and the reduction melting of lateritic nickel ore of coal during lateritic nickel ore coal-based direct reduction
Production ferronickel powder.Semicoke after being pyrolyzed in the system continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace and obtains gold
Category pellet.The system can realize the pyrolysis of coal in lateritic nickel ore Direct Reduction, be able to the petroleum resources of preciousness
Reclaim, increased the side-product of rotary hearth furnace coal-based DR process, also, more than the flue gas of rotary hearth furnace furnace interior generation
Heat effectively can be recycled, so as to the system realizes environmental protection, reduces indirectly process energy consumption and cost.
To solve above-mentioned technical problem, the technical solution adopted in the utility model is：
This utility model provides a kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and goes back
Former response system, it is characterised in that include：Dispensing mixing device, shaped device, drying device, with pyrolysis and restoring function
Rotary hearth furnace, device for recovering oil and gas, mill ore magnetic selection device and fume dust remover, wherein：
The dispensing mixing device includes：Lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material go out
Mouthful, for lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain mixed material；
The shaped device includes：Mixed material entrance and mixing pelletizing outlet, the mixed material entrance are mixed with described
Close material outlet to be connected, for the mixed material is carried out forming processes, obtain mixing pelletizing；
The drying device includes：Mixing pelletizing entrance and the outlet of dry bulb group, the mixing pelletizing entrance are mixed with described
Pelletizing outlet is connected, and for the mixing pelletizing is dried process, obtains dry bulb group；
The rotary hearth furnace with pyrolysis and restoring function includes：Adjacent feed zone, pyrolysis zone, reducing zone and go out successively
Material area, wherein, the pyrolysis zone is provided with partition wall respectively between the feed zone, the reducing zone, the reducing zone with it is described
Partition wall is provided between discharge zone, the partition wall is extended downwardly by the roof of the rotary hearth furnace, and the cloth tray with the rotary hearth furnace
Keep certain intervals；Wherein, multiple heating tubes are provided with the inside of the pyrolysis zone furnace wall, for heating tube being carried out to the pyrolysis zone
Mode is heated；Multiple burners are provided with the inside of the reducing zone furnace wall, for burner mode heating is carried out to the reducing zone；It is described
Feed zone furnace wall is provided with dry bulb group entrance, and the pyrolysis zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet and pyrolysis oil
Gas is exported, and the reducing zone furnace wall is provided with high-temperature flue gas outlet, and the discharge zone furnace wall is provided with metallized pellet outlet, institute
State dry bulb group's entrance and export with dry bulb group and be connected；
The device for recovering oil and gas includes：Pyrolysis oil gas entrance, tar outlet and gas outlet, the pyrolysis oil gas entrance
It is connected with the pyrolysis oil gas vent, for the pyrolysis oil gas is collected and separating treatment, obtains tar and combustion gas；
The mill ore magnetic selection device includes：Metallized pellet entrance, ferronickel powder outlet and tailings outlet, the metallization ball
Group's entrance is connected with metallized pellet outlet, for the metallized pellet is carried out mill ore magnetic selection process, obtains ferronickel
Powder and tailings；
The fume dust remover includes：High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, the high-temperature flue gas entry
It is connected with the high-temperature flue gas outlet of the rotary hearth furnace, for the high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal cigarette
Gas, the high-temperature dust removal exhanst gas outlet are connected with the heating tube high-temperature dust removal smoke inlet of the rotary hearth furnace, for high temperature is removed
Thermal source of the cloud of dust gas as heating tube, heats the material of rotary hearth furnace pyrolysis zone.
Inventor has found, simple according to the system structure of this utility model embodiment, easy to operate, the semicoke after pyrolysis after
The direct reduction reactor for continuing the participation lateritic nickel ore in rotary hearth furnace obtains metallized pellet.The system can be direct in lateritic nickel ore
Reduction process realizes the pyrolysis of coal, is reclaimed the petroleum resources of preciousness, increased rotary hearth furnace coal-based DR process
Side-product, also, the rotary hearth furnace furnace interior produce fume afterheat effectively can be recycled, so as to the system reality
Show environmental protection, reduce indirectly process energy consumption and cost.
According to embodiment of the present utility model, the horizontal cross-section with pyrolysis and the rotary hearth furnace of restoring function is annulus
Shape, the annulus angle 30-100 of the pyrolysis zone.
According to embodiment of the present utility model, the horizontal cross-section with pyrolysis and the rotary hearth furnace of restoring function is annulus
Shape, the annulus angle 240-300 of the reducing zone.
The beneficial effects of the utility model are：
（1）The pyrolysis and reduction of the fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group that this utility model is provided
Response system and method, can realize the pyrolysis of coal in lateritic nickel ore Direct Reduction so that valuable petroleum resources is able to
Reclaim, increased the side-product of rotary hearth furnace coal-based DR process, so as to reduce indirectly process energy consumption and cost.
（2）The pyrolysis and reduction of the fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group that this utility model is provided
Response system and method, the semicoke after pyrolysis continue the direct reduction reactor that lateritic nickel ore is participated in rotary hearth furnace, so as to obtain
Metallized pellet.
（3）The pyrolysis and reduction of the fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group that this utility model is provided
Response system and method, rotary hearth furnace heat heating tube using high-temperature dust removal flue gas so that the cigarette that rotary hearth furnace furnace interior is produced
Gas waste heat effectively can be recycled, so as to the system realizes energy-saving and emission-reduction, and environmental protection reduces cost.
Description of the drawings
Fig. 1 is the structure chart of the pyrolysis of this utility model high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system.
Fig. 2 is the simple diagram of the pyrolysis of this utility model high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system.
Wherein, 10, heating tube, 20, partition wall, 30, burner, 40, flue, 100, dispensing mixing device, 101, lateritic nickel ore
Entrance, 102, reduction coal entrance, 103, additive entrance, 104, mixed material outlet 200, shaped device, 201, mixed material
Entrance, 202, mixing pelletizing outlet, 300, drying device, 301, mixing pelletizing entrance, 302, the outlet of dry bulb group, 400, with heat
Solution and restoring function rotary hearth furnace, 401, dry bulb group entrance, 402, metallized pellet outlet, 403, pyrolysis oil gas vent, 404,
High-temperature flue gas outlet, 405, heating tube high-temperature dust removal smoke inlet, 500, device for recovering oil and gas, 501, pyrolysis oil gas entrance,
502nd, tar outlet, 503, gas outlet, 600, mill ore magnetic selection device, 601, metallized pellet entrance, 602, ferronickel powder outlet,
603rd, tailings outlet, 700, fume dust remover, 701, high-temperature flue gas entry, 702, high-temperature dust removal exhanst gas outlet.
Specific embodiment
In order that those skilled in the art more fully understand the technical solution of the utility model, with reference to specific embodiment
The utility model is described in further detail.The embodiments described below is exemplary, is only used for explaining that this practicality is new
Type, and it is not intended that to restriction of the present utility model.Unreceipted particular technique or condition in embodiment, according in the art
Document described by technology or condition or carry out according to product description.
According to one side of the present utility model, this utility model provides a kind of fume afterheat furnace interior recycling type
Lateritic nickel ore dry bulb group pyrolysis and reduction reaction system, its structure as shown in figure 1, including：Dispensing mixing device 100, molding
Device 200, drying device 300, the rotary hearth furnace 400 with pyrolysis and restoring function, device for recovering oil and gas 500, mill ore magnetic selection dress
Put 600 and fume dust remover 700.Fig. 2 is the pyrolysis of this utility model high efficiente callback lateritic nickel ore dry bulb group and reduction reaction
The simple diagram of system, as illustrated, the dispensing mixing device includes：Lateritic nickel ore entrance 101, reduction coal entrance 102, addition
Agent entrance 103 and mixed material outlet 104, for lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain
Mixed material；The shaped device includes：Mixed material entrance 201 and mixing pelletizing outlet 202, the mixed material entrance with
The mixed material outlet is connected, and for the mixed material is carried out forming processes, obtains mixing pelletizing；The drying device
Including：Mixing pelletizing entrance 301 and dry bulb group outlet 302, the mixing pelletizing entrance are connected with the mixing pelletizing outlet, are used
In the mixing pelletizing is dried process, dry bulb group is obtained；The rotary hearth furnace with pyrolysis and restoring function includes：According to
Secondary adjacent feed zone, pyrolysis zone, reducing zone and discharge zone；The device for recovering oil and gas includes：Pyrolysis oil gas entrance 501, Jiao
Oil export 502 and gas outlet 503, the pyrolysis oil gas entrance are connected with the pyrolysis oil gas vent；The mill ore magnetic selection dress
Put including：Metallized pellet entrance 601, ferronickel powder outlet 602 and tailings outlet 603, the metallized pellet entrance with it is described
Metallized pellet outlet is connected；The fume dust remover includes：High-temperature flue gas entry 701 and high-temperature dust removal exhanst gas outlet 702,
The high-temperature flue gas entry is connected with the high-temperature flue gas outlet of the rotary hearth furnace, and the high-temperature dust removal exhanst gas outlet turns bottom with described
The heating tube high-temperature dust removal smoke inlet of stove is connected.
Inventor has found, simple according to the system structure of this utility model embodiment, easy to operate, the semicoke after pyrolysis after
The direct reduction reactor for continuing the participation lateritic nickel ore in rotary hearth furnace obtains metallized pellet.The system can be direct in lateritic nickel ore
Reduction process realizes the pyrolysis of coal, is reclaimed the petroleum resources of preciousness, increased rotary hearth furnace coal-based DR process
Side-product, also, the rotary hearth furnace furnace interior produce fume afterheat effectively can be recycled, so as to the system reality
Show environmental protection, reduce indirectly process energy consumption and cost.
According to specific embodiment of the utility model, the rotary hearth furnace with pyrolysis and restoring function includes：Phase successively
Adjacent feed zone, pyrolysis zone, reducing zone and discharge zone, wherein, the pyrolysis zone respectively with the feed zone, the reducing zone it
Between be provided with partition wall 20, partition wall 20, roof of the partition wall by the rotary hearth furnace are provided between the reducing zone and the discharge zone
Extend downwardly, and certain intervals are kept with the cloth tray of the rotary hearth furnace.
According to specific embodiment of the utility model, the feed zone furnace wall is provided with dry bulb group entrance 401, the dry bulb
Group's entrance is rolled into a ball outlet with the dry bulb and is connected, and dry bulb group's entrance is carried out in the rotary hearth furnace instead for dry bulb group is added
Should；The pyrolysis zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet 405 and pyrolysis oil gas vent 403, the heating tube
High-temperature dust removal smoke inlet is for will be heated in the heating tube of heating tube high-temperature dust removal flue gas feeding described rotary hearth furnace, described
Pyrolysis oil gas vent is used to for pyrolysis oil gas to discharge the rotary hearth furnace；The reducing zone furnace wall is provided with high-temperature flue gas outlet 404,
Discharge for the high-temperature flue gas that the reducing zone by the rotary hearth furnace produces；The discharge zone furnace wall is provided with metallized pellet outlet
402, for metallized pellet is discharged.Thus, flue 40 is located at reducing zone by the rotary hearth furnace, and the flue gas of generation is through dedusting
Afterwards directly as the thermal source of pyrolysis zone heating tube, the fume afterheat for realizing furnace interior generation effectively can be recycled, from
And, the system realizes environmental protection, reduces indirectly process energy consumption and cost.
According to specific embodiment of the utility model, the concrete shape with pyrolysis and the rotary hearth furnace of restoring function is not
It is particularly limited, as long as can realize being pyrolyzed and reduction reaction lateritic nickel ore dry bulb group.Of the present utility model
In some embodiments, the horizontal cross-section with pyrolysis and the rotary hearth furnace of restoring function is annular, also, shared by each area
Annulus angle be not particularly limited.Preferably, the annulus angle 30-100 of the pyrolysis zone, the annulus folder of the reducing zone
Angle 240-300, it is ensured that good pyrolysis effect and reduction effect.
According to specific embodiment of the utility model, the pyrolysis zone with pyrolysis and the rotary hearth furnace of restoring function plus
Hot mode is not particularly limited, as long as raw material can be heated.In some embodiments of the present utility model, the pyrolysis
Area is heated by the way of heating tube, and further, the heating tube is may be mounted on the inside of the furnace wall of the pyrolysis zone,
Multiple heating tubes 10 can be set.In some embodiments of the present utility model, the heating tube includes body and internal heat resource,
Body is first heated for internal heat resource to hot mode, body is transferred heat in stove again, and this process is not disturbed to furnace atmosphere
It is dynamic.So as to realizing and the raw material of the pyrolysis zone being heated.
According to specific embodiment of the utility model, the reducing zone with pyrolysis and the rotary hearth furnace of restoring function plus
Hot mode is not particularly limited, as long as raw material can be heated.In some embodiments of the present utility model, the reduction
Area is heated by the way of burner, and further, the burner is may be mounted on the inside of the furnace wall of the reducing zone, can be with
Multiple burners 30 are set.In some embodiments of the present utility model, radiant heat transfer is passed through using the heat that burner combustion is produced
Mode passing to pelletizing.Because the burning of burner naked light is with the advantage that burning capacity is big, heating-up temperature is high（Up to 1500
℃）, so as to realizing and the raw material of the reducing zone being heated.
According to specific embodiment of the utility model, the system also includes the device for recovering oil and gas, as long as can be to heat
Solution oil gas is reclaimed.In some embodiments of the present utility model, the device for recovering oil and gas includes：Pyrolysis oil gas enters
Mouthful, tar outlet and gas outlet, the pyrolysis oil gas entrance is connected with the pyrolysis oil gas vent, for by the pyrolysis oil
Gas is collected and separating treatment, obtains tar and combustion gas, is reclaimed the petroleum resources of preciousness.Thus, effectively by institute
Producing pyrolysis oil gas to be recycled in stating rotary hearth furnace, being reclaimed the petroleum resources of preciousness, so as to increased rotary hearth furnace
The side-product of coal-based DR process, reduces process energy consumption and cost indirectly.
According to specific embodiment of the utility model, the system also includes the fume dust remover, for high temperature cigarette
Gas carries out dust removal process, obtains high-temperature dust removal flue gas.In some embodiments of the present utility model, the fume dust remover bag
Include：High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, the high-temperature flue gas outlet of the high-temperature flue gas entry and the rotary hearth furnace
It is connected, for the high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal flue gas, the high-temperature dust removal exhanst gas outlet and institute
The heating tube high-temperature dust removal smoke inlet for stating rotary hearth furnace is connected, and, heats as the thermal source of heating tube for using high-temperature dust removal flue gas
The material of rotary hearth furnace pyrolysis zone.Thus, the fume afterheat that the rotary hearth furnace furnace interior is produced effectively can be recycled, from
And, the system realizes environmental protection, reduces cost.
According to specific embodiment of the utility model, the system also includes the mill ore magnetic selection device, for by the gold
Category pellet carries out mill ore magnetic selection process, obtains ferronickel powder and tailings.In some embodiments of the present utility model, the ore grinding
Concentration equipment includes：Metallized pellet entrance, ferronickel powder outlet and tailings outlet, the metallized pellet entrance and the metal
Pellet outlet is connected, and for the metallized pellet is carried out mill ore magnetic selection process, obtains ferronickel powder and tailings.Thus, should
System realizes the effective process to lateritic nickel ore, has obtained ferro-nickel product.
According to embodiment of the present utility model, the weight proportion of lateritic nickel ore, reduction coal and additive in the system
It is not particularly limited.Lateritic nickel ore, reduction coal and additive in some embodiments of the present utility model, in the system
Weight proportion be lateritic nickel ore：Reduction coal：Additive=100：10-40：3-15.Because, when raw material lateritic nickel ore, reduction coal
It is located in above range with the weight proportion of additive, cinder viscosity can be made low, so as to be conducive to aggregation and the length of ferronickel granule
Greatly.
According to embodiment of the present utility model, the species of reduction coal and additive in the system is not specifically limited
System, as long as can be used in being reacted.In some embodiments of the present utility model, the reduction coal is middle low-order coal,
The additive is at least one in alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali salt.Enter one
Step, the volatile matters of the reduction coal are not less than 20%, it is preferred that for brown coal.
In other side of the present utility model, this utility model is carried out red there is provided one kind using foregoing system
Native nickel minerals dry bulb pyrolysis and the method for reduction reaction, comprise the following steps：
（1）Lateritic nickel ore, reduction coal and additive addition dispensing mixing device is carried out into batch mixing and dispensing is processed, mixed
Compound material.
According to embodiment of the present utility model, the system includes dispensing mixing device, for by lateritic nickel ore, reduction coal
Batch mixing is carried out with additive and dispensing is processed, obtain mixed material.In some embodiments of the present utility model, in the system
Lateritic nickel ore and reduction coal and the weight proportion of additive be lateritic nickel ore：Reduction coal：Additive=100：10-40：3-15.
Because when the weight proportion of raw material lateritic nickel ore, reduction coal and additive is located in above range, cinder viscosity can be made low, from
And, be conducive to the aggregation of ferronickel granule and grow up.According to embodiment of the present utility model, the reduction coal and addition in the system
The species of agent is not particularly limited, as long as can be used in carrying out pyrolytic reaction.In some embodiments of the present utility model
In, the reduction coal is middle low-order coal, and the additive is alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali
At least one in earth metal salt.Further, the volatile matters of the reduction coal are not less than 20%, it is preferred that for brown coal.
（2）Mixed material addition shaped device is carried out into forming processes, obtains mixing pelletizing.
（3）Add drying device to be dried process mixing pelletizing, obtain dry bulb group.
（4）Dry bulb group is added in the rotary hearth furnace with pyrolysis and restoring function and is pyrolyzed and reduction treatment, obtained
Pyrolysis oil gas and metallized pellet.
According to specific embodiment of the utility model, the rotary hearth furnace with pyrolysis and restoring function includes：Phase successively
Adjacent feed zone, pyrolysis zone, reducing zone and discharge zone, wherein, the pyrolysis zone respectively with the feed zone, the reducing zone it
Between be provided with partition wall, partition wall is provided between the reducing zone and the discharge zone, the partition wall is downward by the roof of the rotary hearth furnace
Extend, and certain intervals are kept with the cloth tray of the rotary hearth furnace.Dry bulb group is described with pyrolysis and restoring function
Rotary hearth furnace carries out being pyrolyzed and the reaction temperature of reduction treatment is：Pyrolysis temperature 400-900 DEG C of pyrolysis zone, in the pyrolysis zone pair
The reduction coal of the dry bulb group carries out pyrolysis processing and obtains being pyrolyzed oil gas；1000-1400 DEG C of the reduction temperature of reducing zone, described
Reducing zone is reduced to the pelletizing after pyrolysis, to reach good reduction effect, finally gives metallized pellet in discharge zone
Discharge rotary hearth furnace.Thus, the system can realize the pyrolysis of coal in lateritic nickel ore Direct Reduction, also, after being pyrolyzed
Semicoke continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace and obtains metallized pellet.
The device for recovering oil and gas, for the pyrolysis oil gas is collected and separating treatment, obtains tar and combustion gas,
Reclaimed the petroleum resources of preciousness.Thus, effectively will produce pyrolysis oil gas to be recycled in the rotary hearth furnace, make
Valuable petroleum resources is reclaimed, so as to increased the side-product of rotary hearth furnace coal-based DR process, reducing indirectly work
Artistic skill consumes and cost.The fume dust remover, for the high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal cigarette
Gas, the high-temperature dust removal exhanst gas outlet are connected with the heating tube high-temperature dust removal smoke inlet of the rotary hearth furnace, for high temperature is removed
Thermal source of the cloud of dust gas as heating tube, heats the material of rotary hearth furnace pyrolysis zone.Thus, the cigarette that the rotary hearth furnace furnace interior is produced
Gas waste heat effectively can be recycled, so as to the system realizes environmental protection, reduces cost.
（5）Metallized pellet is entered into mill ore magnetic selection device carries out mill ore magnetic selection process, obtains ferronickel powder and tailings.Root
According to embodiment of the present utility model, the mill ore magnetic selection device, for the metallized pellet is carried out mill ore magnetic selection process, obtain
To ferronickel powder and tailings.Thus, the system realizes the efficient recovery to lateritic nickel ore, has obtained ferro-nickel product.
Inventor has found, simple according to the system structure of this utility model embodiment, easy to operate, the semicoke after pyrolysis after
The direct reduction reactor for continuing the participation lateritic nickel ore in rotary hearth furnace obtains metallized pellet.The system can be direct in lateritic nickel ore
Reduction process realizes the pyrolysis of coal, is reclaimed the petroleum resources of preciousness, increased rotary hearth furnace coal-based DR process
Side-product, also, the rotary hearth furnace furnace interior produce fume afterheat effectively can be recycled, so as to the system reality
Show environmental protection, reduce indirectly process energy consumption and cost.
Embodiment 1
By lateritic nickel ore（Containing Ni 1.85%）, bituminous coal（Volatile matters 25%）With sodium carbonate in mass ratio 100:10:5 in batch mixing
Dispensing, mixing treatment are carried out in proportioner and obtains mixed material, mixed material carries out forming processes in shaped device and obtains
Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing（Aqueous 1.0%）, by dry bulb group
It is pyrolyzed and reduction treatment in the rotary hearth furnace with pyrolysis and restoring function, the annulus angle 30 of pyrolysis zone, pyrolysis zone temperature
400 DEG C of degree, the annulus angle 300 of reducing zone, 1000 DEG C of reducing zone temperature, the high temperature of the origin of heat rotary hearth furnace of heating tube are removed
Cloud of dust gas, the pyrolysis oil gas for obtaining obtain tar and combustion gas by device for recovering oil and gas process, and metallized pellet sends into mill ore magnetic selection
Mill ore magnetic selection process is carried out in device and obtains ferronickel powder（Containing Ni 5.62%, TFe 64.73%）And tailings, the recovery of whole flow process nickel
Rate 95%, recycles high-temperature dust removal flue gas energy-conservation 15%.
Embodiment 2
By lateritic nickel ore（Containing Ni 2.45%）, brown coal（Volatile matters 40%）With limestone in mass ratio 100:20:15 in batch mixing
Dispensing, mixing treatment are carried out in proportioner and obtains mixed material, mixed material carries out forming processes in shaped device and obtains
Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing（Aqueous 1.5%）, by dry bulb group
It is pyrolyzed and reduction treatment in the rotary hearth furnace with pyrolysis and restoring function, the annulus angle 60 of pyrolysis zone, pyrolysis zone temperature
600 DEG C of degree, the annulus angle 270 of reducing zone, 1250 DEG C of reducing zone temperature, the high temperature of the origin of heat rotary hearth furnace of heating tube are removed
Cloud of dust gas, the pyrolysis oil gas for obtaining obtain tar and combustion gas by device for recovering oil and gas process, and metallized pellet sends into mill ore magnetic selection
Mill ore magnetic selection process is carried out in device and obtains ferronickel powder（Containing Ni 6.82%, TFe 65.64%）And tailings, the recovery of whole flow process nickel
Rate 96%, recycles high-temperature dust removal flue gas energy-conservation 10%.
Embodiment 3
By lateritic nickel ore（Containing Ni 1.12%）, ub-bituminous coal（Volatile matters 35%）With Calx in mass ratio 100:30:9 in batch mixing
Dispensing, mixing treatment are carried out in proportioner and obtains mixed material, mixed material carries out forming processes in shaped device and obtains
Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing（Aqueous 0.5%）, by dry bulb group
It is pyrolyzed and reduction treatment in the rotary hearth furnace with pyrolysis and restoring function, the annulus angle 100 of pyrolysis zone, pyrolysis zone
900 DEG C of temperature, the annulus angle 240 of reducing zone, 1400 DEG C of reducing zone temperature, the high temperature of the origin of heat rotary hearth furnace of heating tube
Dedusting flue gas, the pyrolysis oil gas for obtaining obtain tar and combustion gas by device for recovering oil and gas process, and metallized pellet sends into ore grinding magnetic
Mill ore magnetic selection process is carried out in screening device and obtains ferronickel powder（Containing Ni 3.83%, TFe 75.83%）And tailings, whole flow process nickel time
Yield 97%, recycles high-temperature dust removal flue gas energy-conservation 10%.
In description of the present utility model, it is to be understood that term " first ", " second " are only used for describing purpose, and
It is not intended that indicating or implying relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define
The feature of " first ", " second " can be expressed or implicitly include one or more this feature.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, it is for example, it may be fixedly connected, or be detachably connected or integral；Can be
It is mechanically connected, or electrically connects；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in this utility model.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
Example ", or the description of " some examples " etc. mean specific features with reference to the embodiment or example description, structure, material or spy
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State that be not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combined in any one or more embodiments or example in an appropriate manner.Additionally, in the case of not conflicting, this area
Technical staff the feature of the different embodiments or example described in this specification and different embodiment or example can be entered
Row is combined and is combined.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to restriction of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, be changed, being replaced and modification, simultaneously for one of ordinary skill in the art, foundation
The thought of the application, will change in specific embodiments and applications.
Claims (3)
1. a kind of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb is rolled into a ball pyrolysis and reduction reaction system, its feature exist
In, including：Dispensing mixing device, shaped device, drying device, the rotary hearth furnace with pyrolysis and restoring function, petroleum vapor recovery dress
Put, mill ore magnetic selection device and fume dust remover, wherein：
The dispensing mixing device includes：The outlet of lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material, uses
In lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, mixed material is obtained；
The shaped device includes：Mixed material entrance and mixing pelletizing outlet, the mixed material entrance and the mixture
Material outlet is connected, and for the mixed material is carried out forming processes, obtains mixing pelletizing；
The drying device includes：Mixing pelletizing entrance and the outlet of dry bulb group, the mixing pelletizing entrance mix pelletizing with described
Outlet is connected, and for the mixing pelletizing is dried process, obtains dry bulb group；
The rotary hearth furnace with pyrolysis and restoring function includes：Adjacent feed zone, pyrolysis zone, reducing zone and discharging successively
Area, wherein, the pyrolysis zone is provided with partition wall respectively between the feed zone, the reducing zone, the reducing zone with it is described go out
Material is provided with partition wall between area, and the partition wall is extended downwardly by the roof of the rotary hearth furnace, and protects with the cloth tray of the rotary hearth furnace
Hold certain intervals；Wherein, multiple heating tubes are provided with the inside of the pyrolysis zone furnace wall, for heating tube side being carried out to the pyrolysis zone
Formula is heated；Multiple burners are provided with the inside of the reducing zone furnace wall, for burner mode heating is carried out to the reducing zone；It is described enter
Material area furnace wall is provided with dry bulb group entrance, and the pyrolysis zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet and pyrolysis oil gas
Outlet, the reducing zone furnace wall are provided with high-temperature flue gas outlet, and the discharge zone furnace wall is provided with metallized pellet outlet, described
Dry bulb group's entrance is exported with dry bulb group and is connected；
The device for recovering oil and gas includes：Pyrolysis oil gas entrance, tar outlet and gas outlet, the pyrolysis oil gas entrance and institute
State pyrolysis oil gas vent to be connected, for the pyrolysis oil gas is collected and separating treatment, obtain tar and combustion gas；
The mill ore magnetic selection device includes：Metallized pellet entrance, ferronickel powder outlet and tailings outlet, the metallized pellet enter
Mouthful with the metallized pellet outlet be connected, for the metallized pellet is carried out mill ore magnetic selection process, obtain ferronickel powder with
Tailings；
The fume dust remover includes：High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, the high-temperature flue gas entry and institute
The high-temperature flue gas outlet for stating rotary hearth furnace is connected, and for the high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal flue gas, institute
State high-temperature dust removal exhanst gas outlet to be connected with the heating tube high-temperature dust removal smoke inlet of the rotary hearth furnace, for by high-temperature dust removal flue gas
As the thermal source of heating tube, the material of rotary hearth furnace pyrolysis zone is heated.
2. system according to claim 1, it is characterised in that the level with pyrolysis and the rotary hearth furnace of restoring function
Section is annular, the annulus angle 30-100 of the pyrolysis zone.
3. system according to claim 1, it is characterised in that the level with pyrolysis and the rotary hearth furnace of restoring function
Section is annular, the annulus angle 240-300 of the reducing zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051881.0U CN206069973U (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051881.0U CN206069973U (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206069973U true CN206069973U (en) | 2017-04-05 |
Family
ID=58438032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621051881.0U Expired - Fee Related CN206069973U (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206069973U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222447A (en) * | 2016-09-13 | 2016-12-14 | 江苏省冶金设计院有限公司 | The pyrolysis of a kind of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system and method |
-
2016
- 2016-09-13 CN CN201621051881.0U patent/CN206069973U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222447A (en) * | 2016-09-13 | 2016-12-14 | 江苏省冶金设计院有限公司 | The pyrolysis of a kind of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system and method |
| CN106222447B (en) * | 2016-09-13 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110195156A (en) | A kind of iron ore rotary kiln coal base hydrogen metallurgical technology and its device | |
| CN104152165B (en) | The metallurgical reducing process of coal gas circulation coal wholegrain radial sector pyrolysis coupling and system | |
| CN101538632A (en) | Preparation process and device of sponge iron | |
| CN205856558U (en) | A kind of refractory iron ore stone powder magnetizing roast system | |
| CN106011457B (en) | A kind of refractory iron ore mountain flour magnetizing roast system and technique | |
| CN106635067A (en) | Shaft furnace process for producing iron coke | |
| CN109136539A (en) | A kind of fluidized bed two stage gasification and flash light-calcined magnesite integral process | |
| CN106282467B (en) | A kind of iron ore fine coal base production direct-reduction facilities and method | |
| CN106244758A (en) | A kind of system and method efficiently utilizing body of heater fume afterheat to process iron-containing resource | |
| CN206069973U (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system | |
| CN106282468B (en) | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group | |
| CN206069974U (en) | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system | |
| CN205990448U (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system | |
| CN206069972U (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore wet bulb group and reduction reaction system | |
| CN205990419U (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore block and reduction reaction system | |
| CN106222447B (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system and method | |
| CN106222448B (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore wet bulb group and reduction reaction system and method | |
| CN205990417U (en) | A kind of pyrolysis of high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system | |
| CN106191464B (en) | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method | |
| CN110106368A (en) | A kind of method of lateritic nickel ore indirect heating compound roasting-floating and enriching nickel cobalt | |
| CN205990416U (en) | A kind of utilization body of heater fume afterheat the system of high efficiente callback iron-containing resource | |
| CN205990420U (en) | A kind of reduction reaction system of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group | |
| CN106191431B (en) | A kind of reduction reaction system and method for the aqueous pelletizing of lateritic nickel ore | |
| CN205990447U (en) | A kind of reduction reaction system of the aqueous pelletizing of efficient process lateritic nickel ore | |
| CN106222449B (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20170405 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20170405 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 Termination date: 20180913 |