CN206069974U - A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system - Google Patents
A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system Download PDFInfo
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Abstract
This utility model is related to chemical industry metallurgical field, and in particular to the system and method for 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 lateritic nickel ore dry bulb group and reduction reaction system and method, the pyrolysis and the reduction melting of lateritic nickel ore of coal during lateritic nickel ore coal-based direct reduction are realized.The system can realize the pyrolysis of coal in lateritic nickel ore Direct Reduction, be reclaimed the petroleum resources of preciousness, so as to increased the side-product of rotary hearth furnace coal-based DR process, reducing process energy consumption and cost.Meanwhile, the semicoke after pyrolysis continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace and obtains metallized pellet.
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 and method for 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 a kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method, realize red
The pyrolysis and the reduction melting of lateritic nickel ore of the coal during native nickel minerals coal-based direct reduction.The system can be straight in lateritic nickel ore
The pyrolysis that reduction process realizes coal is connect, is reclaimed the petroleum resources of preciousness, so as to increased rotary hearth furnace coal base directly also
The side-product of former technique, reduces process energy consumption and cost.Meanwhile, the semicoke after pyrolysis continues laterite nickel is participated in rotary hearth furnace
The direct reduction reactor of ore deposit obtains metallized pellet.
To solve above-mentioned technical problem, the technical solution adopted in the utility model is：
This utility model provides a kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system, it is characterised in that bag
Include：Dispensing mixing device, shaped device, drying device, the rotary hearth furnace with pyrolysis and restoring function, device for recovering oil and gas and slag
Ferrum segregation apparatuss；
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
Barricade is provided between discharge zone, the partition wall is to be extended downwardly by the roof of the rotary hearth furnace with the barricade, and with it is described
The cloth tray of rotary hearth furnace keeps certain intervals；Wherein, multiple heating tubes are provided with the inside of the pyrolysis zone furnace wall, for the heat
Xie Qu carries out heating tube mode heating；Multiple burners are provided with the inside of the reducing zone furnace wall, for burning to the reducing zone
Mouth mode is heated；The feed zone furnace wall is provided with dry bulb group entrance, and the pyrolysis zone furnace wall is provided with pyrolysis oil gas vent, institute
State discharge zone furnace wall and be provided with metallized pellet outlet, 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
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 slag sluicing system device includes：Metallized pellet entrance, ferro-nickel product outlet and tailings outlet, the metallization
Pelletizing entrance is connected with metallized pellet outlet, for the metallized pellet is carried out slag sluicing system process, obtains nickel
Iron product and tailings.
Inventor has found that simple according to the system structure of this utility model embodiment, easy to operate, the system can be red
Native nickel minerals Direct Reduction realizes the pyrolysis of coal, is reclaimed the petroleum resources of preciousness, so as to increased rotary hearth furnace coal
The side-product of base directly reducing technology, reduces process energy consumption and cost.Meanwhile, the semicoke after pyrolysis continues in rotary hearth furnace internal reference
Plus the direct reduction reactor of lateritic nickel ore obtains metallized pellet.
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）This utility model provides a kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method, can
The pyrolysis of coal is realized in lateritic nickel ore Direct Reduction so that valuable petroleum resources is able to recovery and increased rotary hearth furnace coal
The side-product of base directly reducing technology, so as to reduce process energy consumption and cost.
（2）This utility model provides a kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method, pyrolysis
Semicoke afterwards continues the direct reduction reactor that lateritic nickel ore is participated in rotary hearth furnace, obtains metallized pellet.
（3）This utility model provides a kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method, can be with
In utilization, low-order coal carries out the direct-reduction production of lateritic nickel ore, reduces production cost.
Description of the drawings
Fig. 1 is the structure chart of the pyrolysis of this utility model lateritic nickel ore dry bulb group and reduction reaction system.
Fig. 2 is the simple diagram of the pyrolysis of this utility model lateritic nickel ore dry bulb group and reduction reaction system.
Fig. 3 is the workflow diagram of the pyrolysis of this utility model lateritic nickel ore dry bulb group and reduction reaction system.
Wherein, 10, heating tube, 20, partition wall, 30, burner, 40, barricade, 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, pyrolysis oil gas vent, 403, metallized pellet outlet, 500,
Device for recovering oil and gas, 501, pyrolysis oil gas entrance, 502, tar outlet, 503, gas outlet, 600, slag sluicing system device, 601,
Metallized pellet entrance, 602, ferro-nickel product outlet, 603, tailings 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 pyrolysis of lateritic nickel ore dry bulb group and goes back
Former response system, its structure as shown in figure 1, including：Dispensing mixing device 100, shaped device 200, drying device 300, have
Pyrolysis and the rotary hearth furnace 400 of restoring function, device for recovering oil and gas 500 and slag sluicing system device 600.Fig. 2 is that this utility model is red
The pyrolysis of native nickel minerals dry bulb group and the simple diagram of reduction reaction system, as illustrated, the dispensing mixing device includes：Laterite nickel
Ore deposit entrance 101, reduction coal entrance 102, additive entrance 103 and mixed material outlet 104, for by lateritic nickel ore, reduction coal
Dispensing mixing treatment is carried out with additive, mixed material is obtained；The shaped device includes：Mixed material entrance 201 and mixing
Pelletizing outlet 202, the mixed material entrance are connected with mixed material outlet, for the mixed material is carried out molding
Process, obtain mixing pelletizing；The drying device includes：Mixing pelletizing entrance 301 and dry bulb group outlet 302, the mixing ball
Group's entrance is connected with the mixing pelletizing outlet, for the mixing pelletizing is dried process, obtains dry bulb group；The tool
There are pyrolysis and the rotary hearth furnace of restoring function to include：Adjacent feed zone, pyrolysis zone, reducing zone and discharge zone successively；The oil gas
Retracting device includes：Pyrolysis oil gas entrance 501, tar outlet 502 and gas outlet 503, the pyrolysis oil gas entrance with it is described
Pyrolysis oil gas vent is connected；The slag sluicing system device includes：Metallized pellet entrance 601, ferro-nickel product outlet 602 and tailings
Outlet 603, the metallized pellet entrance are connected with metallized pellet outlet.
Inventor has found that simple according to the system structure of this utility model embodiment, easy to operate, the system can be red
Native nickel minerals Direct Reduction realizes the pyrolysis of coal, is reclaimed the petroleum resources of preciousness, so as to increased rotary hearth furnace coal
The side-product of base directly reducing technology, reduces process energy consumption and cost.Meanwhile, the semicoke after pyrolysis continues in rotary hearth furnace internal reference
Plus the direct reduction reactor of lateritic nickel ore obtains 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 20, barricade 40 is provided between the reducing zone and the discharge zone, the partition wall 20 with the barricade 40 is
Extended downwardly by the roof of the rotary hearth furnace, and certain intervals are kept with the cloth tray of the rotary hearth furnace.Thus, the reducing zone
Barricade between discharge zone can effectively separate Liang Ge areas, ensure that reducing zone atmosphere is stable.
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 pyrolysis oil gas vent 402, and the pyrolysis oil gas vent is described for pyrolysis oil gas is discharged
Rotary hearth furnace；The discharge zone furnace wall is provided with metallized pellet outlet 403, for metallized pellet is discharged.
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 10 is may be mounted in the furnace wall of the pyrolysis zone
Side, can arrange multiple heating tubes 10.In some embodiments of the present utility model, the heating tube includes body and inside heat
Source, is internal heat resource to hot mode（Fuel gas buring or electric energy）Body is heated first, body is transferred heat in stove again, and this
Process is not disturbed to furnace atmosphere.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 30 is may be mounted on the inside of the furnace wall of the reducing zone, can
To arrange multiple burners 30.In some embodiments of the present utility model, passed by radiating using the heat that burner combustion is produced
The mode of heat is passing to pelletizing.Because the burning of burner naked light is with the advantage that burning capacity is big, heating-up temperature is high（It is reachable
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 includes the device for recovering oil and gas, as long as can be to pyrolysis
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 of the rotary hearth furnace, for by heat
Solution oil gas is collected and separating treatment, obtains tar and combustion gas.Thus, effectively dust-laden pyrolysis will be produced in the rotary hearth furnace
Oil gas is recycled so that valuable petroleum resources is reclaimed, so as to increased rotary hearth furnace coal-based DR process
Side-product, reduce indirectly process energy consumption and cost.
According to specific embodiment of the utility model, the system includes the slag sluicing system device, as long as can will be described
Metallized pellet carries out slag sluicing system process.In some embodiments of the present utility model, the slag sluicing system device bag
Include：Metallized pellet entrance, ferro-nickel product outlet and tailings outlet, the metallized pellet entrance are gone out with the metallized pellet
Mouth is connected, and for the metallized pellet is carried out slag sluicing system process, obtains ferro-nickel product and tailings.
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 and reduction coal and addition in some embodiments of the present utility model, in the system
The weight proportion of agent is lateritic nickel ore：Reduction coal：Additive=100：10-40：3-15.Because, when raw material lateritic nickel ore, reduction
The weight proportion of coal and additive be located above range in, cinder viscosity can be made low, so as to, be conducive to ferronickel granule aggregation and
Grow up.
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 pyrolysis and the method for reduction reaction, as shown in figure 3, comprising 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, barricade is provided between the reducing zone and the discharge zone, the partition wall is by described turn with the barricade
The roof of bottom stove is extended downwardly, and keeps certain intervals with the cloth tray of the rotary hearth furnace.The dry bulb group is described with heat
The rotary hearth furnace of solution and restoring function carries out being pyrolyzed and the reaction temperature of reduction treatment is：Pyrolysis temperature 400-900 DEG C of pyrolysis zone,
Pyrolysis processing is carried out in the pyrolysis zone to obtain being pyrolyzed oil gas to the reduction coal that the dry bulb is rolled into a ball；The reduction temperature of reducing zone
1000-1400 DEG C, the pelletizing after pyrolysis is reduced in the reducing zone, to reach good reduction effect, finally given
Metallized pellet discharges rotary hearth furnace in discharge zone.Thus, the system can realize coal in lateritic nickel ore Direct Reduction
Semicoke after pyrolysis, also, pyrolysis continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace and obtains metallized pellet.
The system includes the device for recovering oil and gas, for the pyrolysis produced in rotary hearth furnace oil gas is collected and
Separating treatment, obtains tar and combustion gas, as a result, the petroleum resources of preciousness is reclaimed, so as to increased rotary hearth furnace coal base
The side-product of direct-reduction technique, reduces process energy consumption and cost indirectly.
（5）Metallized pellet addition slag sluicing system device is carried out into slag sluicing system process, ferro-nickel product and tailings is obtained.Root
According to specific embodiment of the utility model, the slag sluicing system device, for the metallized pellet is carried out at slag sluicing system
Reason, obtains ferro-nickel product and tailings.Thus, the system realizes the efficient recovery of lateritic nickel ore, has obtained ferro-nickel product.
Inventor has found that simple according to the system structure of this utility model embodiment, easy to operate, the system can be red
Native nickel minerals Direct Reduction realizes the pyrolysis of coal, is reclaimed the petroleum resources of preciousness, so as to increased rotary hearth furnace coal
The side-product of base directly reducing technology, reduces process energy consumption and cost.Meanwhile, the semicoke after pyrolysis continues in rotary hearth furnace internal reference
Plus the direct reduction reactor of lateritic nickel ore obtains metallized pellet.
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, pyrolysis zone annulus angle 30, pyrolysis zone temperature
500 DEG C, reducing zone annulus angle 300,1250 DEG C of reducing zone temperature, the pyrolysis oil gas for obtaining are processed by device for recovering oil and gas
To tar and combustion gas, metallized pellet is sent into slag sluicing system device and carries out slag sluicing system and process obtaining ferronickel powder（Containing Ni 5.62%,
TFe 64.73%）And tailings, whole flow process nickel recovery 95%.
Embodiment 2
By lateritic nickel ore（Containing Ni 2.45%）, brown coal（Volatile matters 40%）With limestone in mass ratio 100:25:15 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, pyrolysis zone annulus angle 40, pyrolysis zone temperature
650 DEG C, reducing zone annulus angle 290,1300 DEG C of reducing zone temperature, the pyrolysis oil gas for obtaining are processed by device for recovering oil and gas
To tar and combustion gas, metallized pellet is sent into slag sluicing system device and carries out slag sluicing system and process obtaining ferronickel powder（Containing Ni 6.82%,
TFe 65.64%）And tailings, whole flow process nickel recovery 96%.
Embodiment 3
By lateritic nickel ore（Containing Ni 1.12%）, ub-bituminous coal（Volatile matters 35%）With Calx in mass ratio 100:40:9 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, pyrolysis zone annulus angle 50, pyrolysis zone temperature
850 DEG C, reducing zone annulus angle 280,1400 DEG C of reducing zone temperature, the pyrolysis oil gas for obtaining are processed by device for recovering oil and gas
To tar and combustion gas, metallized pellet is sent into slag sluicing system device and carries out slag sluicing system and process obtaining ferronickel powder（Containing Ni 3.83%,
TFe 75.83%）And tailings, whole flow process nickel recovery 97%.
Embodiment 4
By lateritic nickel ore（Containing Ni 1.85%）, bituminous coal（Volatile matters 25%）With sodium carbonate in mass ratio 100:15:5 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, pyrolysis zone annulus angle 60, pyrolysis zone temperature
500 DEG C, reducing zone annulus angle 270,1200 DEG C of reducing zone temperature, the pyrolysis oil gas for obtaining are processed by device for recovering oil and gas
To tar and combustion gas, fusing separating treatment is carried out during metallized pellet feeding electric arc furnace is interior at 1450 DEG C and obtains dilval
（Containing Ni 18.62%, TFe 79.73%）With ferronickel slag, whole flow process nickel recovery 96%.
Embodiment 5
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, pyrolysis zone annulus angle 80, pyrolysis zone temperature
600 DEG C, reducing zone annulus angle 250,1300 DEG C of reducing zone temperature, the pyrolysis oil gas for obtaining are processed by device for recovering oil and gas
To tar and combustion gas, fusing separating treatment is carried out at 1550 DEG C in molten point of stove of metallized pellet feeding combustion gas and obtains dilval
（Containing Ni 24.82%, TFe 73.24%）And tailings, whole flow process nickel recovery 97%.
Embodiment 6
By lateritic nickel ore（Containing Ni 1.12%）, ub-bituminous coal（Volatile matters 35%）With Calx in mass ratio 100:35:9 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, pyrolysis zone annulus angle 90, pyrolysis zone temperature
700 DEG C, reducing zone annulus angle 240,1400 DEG C of reducing zone temperature, the pyrolysis oil gas for obtaining are processed by device for recovering oil and gas
To tar and combustion gas, fusing separating treatment is carried out at 1650 DEG C in metallized pellet feeding mineral hot furnace and obtains dilval（Contain
Ni 15.35%, TFe 82.83%）And tailings, whole flow process nickel recovery 98%.
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 lateritic nickel ore dry bulb is rolled into a ball pyrolysis and reduction reaction system, it is characterised in that include：Dispensing mixing device, into
Type device, drying device, the rotary hearth furnace with pyrolysis and restoring function, device for recovering oil and gas and slag sluicing system device；
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 area between be provided with barricade, the partition wall is to be extended downwardly by the roof of the rotary hearth furnace with the barricade, and with described turn
The cloth tray of bottom stove keeps certain intervals；Wherein, multiple heating tubes are provided with the inside of the pyrolysis zone furnace wall, for the pyrolysis
Area carries out heating tube mode heating；Multiple burners are provided with the inside of the reducing zone furnace wall, for burner being carried out to the reducing zone
Mode is heated；The feed zone furnace wall is provided with dry bulb group entrance, and the pyrolysis zone furnace wall is provided with pyrolysis oil gas vent, described
Discharge zone furnace wall is provided with metallized pellet outlet, and 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 slag sluicing system device includes：Metallized pellet entrance, ferro-nickel product outlet and tailings outlet, the metallized pellet
Entrance is connected with metallized pellet outlet, for the metallized pellet is carried out slag sluicing system process, obtains ferronickel product
Product and tailings.
2. a kind of lateritic nickel ore dry bulb according to claim 1 is rolled into a ball pyrolysis and reduction reaction system, it is characterised in that institute
State with pyrolysis and restoring function rotary hearth furnace horizontal cross-section be annular, the annulus angle 30-100 of the pyrolysis zone.
3. a kind of lateritic nickel ore dry bulb according to claim 1 is rolled into a ball pyrolysis and reduction reaction system, it is characterised in that institute
State with pyrolysis and restoring function rotary hearth furnace horizontal cross-section be annular, the annulus angle 240-300 of the reducing zone.
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| CN201621051883.XU CN206069974U (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system |
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| CN201621051883.XU CN206069974U (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191464A (en) * | 2016-09-13 | 2016-12-07 | 江苏省冶金设计院有限公司 | The pyrolysis of a kind of lateritic nickel ore dry bulb group and reduction reaction system and method |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191464A (en) * | 2016-09-13 | 2016-12-07 | 江苏省冶金设计院有限公司 | The pyrolysis of a kind of lateritic nickel ore dry bulb group and reduction reaction system and method |
| CN106191464B (en) * | 2016-09-13 | 2018-07-10 | 江苏省冶金设计院有限公司 | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method |
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