CN106191464A - The pyrolysis of a kind of lateritic nickel ore dry bulb group and reduction reaction system and method - Google Patents
The pyrolysis of a kind of lateritic nickel ore dry bulb group and reduction reaction system and method Download PDFInfo
- Publication number
- CN106191464A CN106191464A CN201610819162.7A CN201610819162A CN106191464A CN 106191464 A CN106191464 A CN 106191464A CN 201610819162 A CN201610819162 A CN 201610819162A CN 106191464 A CN106191464 A CN 106191464A
- Authority
- CN
- China
- Prior art keywords
- pyrolysis
- reduction
- nickel ore
- lateritic nickel
- coal
- 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.)
- Granted
Links
Classifications
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/021—Obtaining nickel or cobalt by dry processes by reduction in solid state, e.g. by segregation processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
-
- 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
Abstract
The present invention relates to chemical industry metallurgical field, be specifically related to a kind of system and method utilizing lateritic nickel ore pyrolysis and reduction reaction.The petroleum resources not accounting in lateritic nickel ore technology in Direct Reduction reclaims reduction coal is processed for existing rotary hearth furnace, the present invention proposes pyrolysis and the reduction reaction system and method for a kind of lateritic nickel ore dry bulb group, realizes pyrolysis and the reduction melting of lateritic nickel ore of coal during lateritic nickel ore coal-based direct reduction.This system can achieve the pyrolysis of coal at lateritic nickel ore Direct Reduction, makes the petroleum resources of preciousness be reclaimed, thus, add the side-product of rotary hearth furnace coal-based DR process, reduce process energy consumption and cost.Meanwhile, 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
The present invention relates to chemical industry metallurgical field.In particular it relates to one utilizes lateritic nickel ore pyrolysis and reduction
The system and method for reaction.
Background technology
In recent years, along with the exhausted of high-grade nickel sulfide ore and the fast development of domestic rustless steel industry, low-grade laterite
Nickel minerals has become as the primary raw material producing 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, uses direct-reduction process that the ferrum in Ore and nickel have been reduced into metallic iron and metallic nickel, then warp
Superfusion point or mill choosing make nickel be enriched in ferro-nickel product.
Now, coal-based DR process has multiple, and wherein, owing to rotary hearth furnace reduction technique has, equipment is simple, operation
Easily, with short production cycle, response speed fast, advantages of environment protection, so rotary hearth furnace reduction technique has caused widely
Pay close attention to.The ultimate principle of rotary hearth iron making is that the high temperature of flame is passed by radiation by being positioned at the burning of the flat flame burner of furnace sidewall
To the pelletizing on bed of material surface, the metal-oxide in carbonaceous pelletizing is made at high temperature to be reduced, heating energy source many employings natural gas,
Cracked gas, coke-stove gas, coal gas of converter and coal gas etc., energy sources is quite varied.Use rotary hearth furnace equipment DRI
(DRI) technique mainly comprises the steps that and Iron Ore Powder is mixed homogeneously with reducing agent coal dust, is pressed into carbonaceous pelletizing ore deposit, dries；
Dry carbonaceous pelletizing is layered on rotary hearth furnace equably, make carbonaceous pelletizing reduced zone in rotary hearth furnace (temperature up to
1300 DEG C～1400 DEG C) in be reduced 15min-30min, i.e. can get the metallized pellet that degree of metalization is more than 85%.Turn
End furnace apparatus is for the advantage producing DRI, the transfixion that reduction temperature is high, the time is short, furnace charge is relative with furnace bottom holding,
Thus avoid the problems such as rotary kiln, fluid bed bonding, shaft furnace dross.Chinese patent CN 102212636A discloses a kind of red
The iron smelting method that point stove melts point is melted in soil nickel minerals rotary hearth furnace coal-based direct reduction combustion gas, is mixed with coal and flux by lateritic nickel ore
Rear pelletizing, dry bulb carries out direct-reduction and obtains metallized pellet in being distributed into rotary hearth furnace, 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 processes in lateritic nickel ore technology and yet suffers from some problems.Reduction coal dust is at lateritic nickel ore
Rotary hearth furnace Direct Reduction only serves reduction mineral and the effect of part supply heat, the oil gas of self preciousness
Resource does not obtain more efficiently utilization.Therefore, existing rotary hearth furnace process lateritic nickel ore technology is further improved.
Summary of the invention
Process in lateritic nickel ore technology for existing rotary hearth furnace and do not account in Direct Reduction reclaims reduction coal
Petroleum resources, the present invention proposes pyrolysis and the reduction reaction system and method for a kind of lateritic nickel ore dry bulb group, realizes laterite nickel
The pyrolysis of the coal during pit coal base directly reducing and the reduction melting of lateritic nickel ore.This system can at lateritic nickel ore directly also
Former process achieves the pyrolysis of coal, makes the petroleum resources of preciousness be reclaimed, thus, add rotary hearth furnace coal-based direct reduction work
The side-product of skill, reduces process energy consumption and cost.Meanwhile, the semicoke after pyrolysis continues to participate in lateritic nickel ore in rotary hearth furnace
Direct reduction reactor obtains metallized pellet.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The invention provides pyrolysis and the reduction reaction system of a kind of lateritic nickel ore dry bulb group, it is characterised in that including: dispensing is mixed
Expect device, shaped device, drying device, there is pyrolysis and the rotary hearth furnace of restoring function, device for recovering oil and gas and slag sluicing system dress
Put；
Described dispensing mixing device includes: lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material outlet, uses
In lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain mixed material；
Described shaped device includes: mixed material entrance and mixing pelletizing outlet, described mixed material entrance and described mixture
Material outlet is connected, and for described mixed material is shaped process, obtains mixing pelletizing；
Described drying device includes: mixing pelletizing entrance and the outlet of dry bulb group, described mixing pelletizing entrance mixes pelletizing with described
Outlet is connected, and for described mixing pelletizing is dried process, obtains dry bulb group；
The described rotary hearth furnace with pyrolysis and restoring function includes: the most adjacent feed zone, pyrolysis zone, reducing zone and discharging
District, wherein, described pyrolysis zone respectively and is provided with partition wall between described feed zone, described reducing zone, described reducing zone with described go out
Material district between be provided with barricade, described partition wall and described barricade are all to be downwardly extended by the roof of described rotary hearth furnace, and with described turn
The cloth tray of end stove keeps certain intervals；Wherein, it is provided with inside furnace wall, described pyrolysis zone and multiple adds heat pipe, for described pyrolysis
District carries out adding heat pipe mode and heats；Described reducing zone is provided with multiple burner inside furnace wall, for described reducing zone is carried out burner
Mode heats；Described feed zone furnace wall is provided with dry bulb group entrance, and furnace wall, described pyrolysis zone is provided with pyrolysis oil gas vent, described
Furnace wall, discharge zone is provided with metallized pellet outlet, and described dry bulb group entrance exports with described dry bulb group and is connected；
Described device for recovering oil and gas includes: pyrolysis oil gas entrance, tar outlet and gas outlet, described pyrolysis oil gas entrance and institute
State pyrolysis oil gas vent to be connected, for being collected and separating treatment by described pyrolysis oil gas, obtain tar and combustion gas；
Described slag sluicing system device includes: the outlet of metallized pellet entrance, ferro-nickel product and tailings outlet, described metallized pellet
Entrance is connected with the outlet of described metallized pellet, for described metallized pellet is carried out slag sluicing system process, obtains ferronickel and produces
Product and tailings.
Inventor finds, system structure according to embodiments of the present invention is simple, and easy to operate, this system can be at laterite nickel
Ore deposit Direct Reduction achieves the pyrolysis of coal, makes the petroleum resources of preciousness be reclaimed, thus, add rotary hearth furnace coal base straight
Connect the side-product of reducing process, reduce process energy consumption and cost.Meanwhile, the semicoke continuation after pyrolysis is participated in red in rotary hearth furnace
The direct reduction reactor of soil nickel minerals obtains metallized pellet.
According to embodiments of the invention, described in there is pyrolysis and restoring function the horizontal cross-section of rotary hearth furnace be annular,
The annulus angle 30-100 of described pyrolysis zone.
According to embodiments of the invention, described in there is pyrolysis and restoring function the horizontal cross-section of rotary hearth furnace be annular,
The annulus angle 240-300 of described reducing zone.
In another aspect of the present invention, the invention provides one and utilize foregoing system to carry out lateritic nickel ore heat
Solve and the method for reduction reaction, it is characterised in that comprise the following steps:
(1) lateritic nickel ore, reduction coal and additive addition dispensing mixing device is carried out batch mixing and dispensing processes, obtain mixture
Material；
(2) mixed material adds shaped device be shaped processing, obtain mixing pelletizing；
(3) mixing pelletizing addition drying device is dried process, obtains dry bulb group；
(4) dry bulb group is joined have pyrolysis and restoring function rotary hearth furnace in carry out being pyrolyzed and reduction treatment, be pyrolyzed
Oil gas and metallized pellet；
(5) metallized pellet is added slag sluicing system device and carry out slag sluicing system process, obtain ferro-nickel product and tailings.
According to embodiments of the invention, the reduction coal in described step (1) is middle low-order coal, and volatile matter is not less than 20%, excellent
Select brown coal.
According to embodiments of the invention, the additive in described step (1) be selected from alkali metal oxide, alkali metal salt,
At least one in alkaline earth oxide and alkali salt.
According to embodiments of the invention, the lateritic nickel ore in described step (1) and reduction coal and the weight proportion of additive
For lateritic nickel ore: reduction coal: additive=100:10-40:3-15.
According to embodiments of the invention, in described step (4), dry bulb group enters at the rotary hearth furnace with pyrolysis and restoring function
The reaction temperature of row pyrolysis and reduction treatment is: pyrolysis temperature 400-900 DEG C, reduction temperature 1000-1400 DEG C.
The beneficial effects of the present invention is:
(1) the invention provides pyrolysis and the reduction reaction system and method for a kind of lateritic nickel ore dry bulb group, it is possible at laterite nickel
Ore deposit Direct Reduction realizes the pyrolysis of coal so that valuable petroleum resources is able to recovery and adds rotary hearth furnace coal base directly also
The side-product of former technique, thus, reduce process energy consumption and cost.
(2) the invention provides pyrolysis and the reduction reaction system and method for a kind of lateritic nickel ore dry bulb group, after pyrolysis
Semicoke continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace, obtains metallized pellet.
(3) the invention provides pyrolysis and the reduction reaction system and method for a kind of lateritic nickel ore dry bulb group, it is possible to use
Middle low-order coal carries out the direct-reduction of lateritic nickel ore and produces, and reduces production cost.
Accompanying drawing explanation
Fig. 1 is pyrolysis and the structure chart of reduction reaction system of lateritic nickel ore dry bulb of the present invention group.
Fig. 2 is pyrolysis and the simple diagram of reduction reaction system of lateritic nickel ore dry bulb of the present invention group.
Fig. 3 is pyrolysis and the workflow diagram of reduction reaction system of lateritic nickel ore dry bulb of the present invention group.
Wherein, 10, add heat pipe, 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, there is heat
Solve and the rotary hearth furnace of restoring function, 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.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment to this
Invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, and is not understood that
For limitation of the present invention.Unreceipted concrete technology or condition in embodiment, according to the skill described by the document in this area
Art or condition or carry out according to product description.
According to an aspect of the present invention, the invention provides pyrolysis and the reduction reaction system of a kind of lateritic nickel ore dry bulb group
System, its structure is as it is shown in figure 1, include: dispensing mixing device 100, shaped device 200, drying device 300, have pyrolysis and also
The rotary hearth furnace 400 of former function, device for recovering oil and gas 500 and slag sluicing system device 600.Fig. 2 is lateritic nickel ore of the present invention dry bulb group
Pyrolysis and the simple diagram of reduction reaction system, as it can be seen, described dispensing mixing device includes: lateritic nickel ore entrance 101, also
Raw coal entrance 102, additive entrance 103 and mixed material outlet 104, for carrying out lateritic nickel ore, reduction coal and additive
Dispensing mixing treatment, obtains mixed material；Described shaped device includes: mixed material entrance 201 and mixing pelletizing outlet 202,
Described mixed material entrance is connected with the outlet of described mixed material, for described mixed material is shaped process, is mixed
Close pelletizing；Described drying device includes: mixing pelletizing entrance 301 and the outlet 302 of dry bulb group, described mixing pelletizing entrance is with described
Mixing pelletizing outlet is connected, and for described mixing pelletizing is dried process, obtains dry bulb group；Described have pyrolysis and reduction
The rotary hearth furnace of function includes: the most adjacent feed zone, pyrolysis zone, reducing zone and discharge zone；Described device for recovering oil and gas includes:
Pyrolysis oil gas entrance 501, tar outlet 502 and gas outlet 503, described pyrolysis oil gas entrance and described pyrolysis oil gas vent phase
Even；Described slag sluicing system device includes: metallized pellet entrance 601, ferro-nickel product outlet 602 and tailings outlet 603, described gold
Belong to pellet entrance to be connected with the outlet of described metallized pellet.
Inventor finds, system structure according to embodiments of the present invention is simple, and easy to operate, this system can be at laterite nickel
Ore deposit Direct Reduction achieves the pyrolysis of coal, makes the petroleum resources of preciousness be reclaimed, thus, add rotary hearth furnace coal base straight
Connect the side-product of reducing process, reduce process energy consumption and cost.Meanwhile, the semicoke continuation after pyrolysis is participated in red in rotary hearth furnace
The direct reduction reactor of soil nickel minerals obtains metallized pellet.
According to a particular embodiment of the invention, the rotary hearth furnace described in pyrolysis and restoring function includes: the most adjacent
Feed zone, pyrolysis zone, reducing zone and discharge zone, wherein, described pyrolysis zone respectively and sets between described feed zone, described reducing zone
Having partition wall 20, be provided with barricade 40 between described reducing zone and described discharge zone, described partition wall 20 is all by institute with described barricade 40
The roof stating rotary hearth furnace downwardly extends, and keeps certain intervals with the cloth tray of described rotary hearth furnace.Thus, described reducing zone with go out
Barricade between material district can separate Liang Ge district effectively, it is possible to ensures that reducing zone atmosphere is stable.
According to a particular embodiment of the invention, described feed zone furnace wall is provided with dry bulb group entrance 401, and described dry bulb group enters
Mouth is rolled into a ball outlet with described dry bulb and is connected, and described dry bulb group entrance reacts in dry bulb is rolled into a ball the described rotary hearth furnace of addition；Institute
Stating furnace wall, pyrolysis zone and be provided with pyrolysis oil gas vent 402, described pyrolysis oil gas vent turns the end described in being discharged by pyrolysis oil gas
Stove；Furnace wall, described discharge zone is provided with metallized pellet outlet 403, for being discharged by metallized pellet.
According to a particular embodiment of the invention, the concrete shape of the rotary hearth furnace described in pyrolysis and restoring function is not had
Body limits, as long as being capable of being pyrolyzed lateritic nickel ore dry bulb group and reduction reaction.Some enforcements in the present invention
In example, described in have the horizontal cross-section of rotary hearth furnace of pyrolysis and restoring function be annular, and, the annulus folder shared by each district
Angle is not particularly limited.Preferably, the annulus angle 30-100 of described pyrolysis zone, the annulus angle 240 of described reducing zone-
300, it is ensured that good pyrolysis effect and reduction effect.
According to a particular embodiment of the invention, there is described in the heating side of the pyrolysis zone of the rotary hearth furnace of pyrolysis and restoring function
Formula is the most particularly limited, as long as hot charge can be added.In some embodiments of the invention, described pyrolysis zone uses and adds
The mode of heat pipe heats, further, described in add heat pipe 10 and may be mounted at inside the furnace wall of described pyrolysis zone, Ke Yishe
Put and multiple add heat pipe 10.In some embodiments of the invention, described in add heat pipe and include body and internal heat resource, to hot mode be
Internal heat resource (fuel gas buring or electric energy) first heats body, and body transfers heat in stove again, and this process is not in stove
Atmosphere disturbance.Thus, it is achieved that the raw material of described pyrolysis zone is heated.
According to a particular embodiment of the invention, there is described in the heating side of the reducing zone of the rotary hearth furnace of pyrolysis and restoring function
Formula is the most particularly limited, as long as hot charge can be added.In some embodiments of the invention, described reducing zone uses and burns
The mode of mouth heats, and further, described burner 30 may be mounted at inside the furnace wall of described reducing zone, can arrange many
Individual burner 30.In some embodiments of the invention, the heat using burner combustion to produce passes by the way of radiant heat transfer
Pass pelletizing.Because the burning of burner naked light has the advantage (up to 1500 DEG C) that burning capacity is big, heating-up temperature is high, thus, real
Show the raw material to described reducing zone to heat.
According to a particular embodiment of the invention, this system includes described device for recovering oil and gas, as long as can be to pyrolysis oil gas
Carry out reclaiming.In some embodiments of the invention, described device for recovering oil and gas includes: pyrolysis oil gas entrance, tar go out
Mouth and gas outlet, described pyrolysis oil gas entrance is connected with the pyrolysis oil gas vent of described rotary hearth furnace, for being entered by pyrolysis oil gas
Row is collected and separating treatment, obtains tar and combustion gas.Thus, effectively carry out described rotary hearth furnace produces dust-laden pyrolysis oil gas
Recycling so that valuable petroleum resources is reclaimed, thus, add the by-product of rotary hearth furnace coal-based DR process
Product, reduce process energy consumption and cost indirectly.
According to a particular embodiment of the invention, this system includes described slag sluicing system device, as long as can be by described metal
Pellet carries out slag sluicing system and processes.In some embodiments of the invention, described slag sluicing system device includes: metallization
The outlet of pelletizing entrance, ferro-nickel product and tailings outlet, described metallized pellet entrance is connected with the outlet of described metallized pellet, uses
In described metallized pellet is carried out slag sluicing system process, obtain ferro-nickel product and tailings.
According to embodiments of the invention, the weight proportion of lateritic nickel ore, reduction coal and additive in described system is not subject to
Concrete restriction.In some embodiments of the invention, the lateritic nickel ore in described system and reduction coal and the weight of additive
Proportioning is lateritic nickel ore: reduction coal: additive=100:10-40:3-15.Because, when raw material lateritic nickel ore, reduction coal and interpolation
The weight proportion of agent is positioned at above-mentioned scope, and cinder viscosity can be made low, thus, the beneficially gathering of ferronickel granule and growing up.
According to embodiments of the invention, reduction coal and the kind of additive in described system are the most particularly limited, only
Can be used in carrying out reacting.In some embodiments of the invention, described reduction coal is middle low-order coal, described additive
For at least one in alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali salt.Further, described
The volatile matter of reduction coal is not less than 20%, it is preferred that for brown coal.
In another aspect of the present invention, the invention provides one and utilize foregoing system to carry out lateritic nickel ore heat
Solve and the method for reduction reaction, as it is shown on figure 3, comprise the following steps:
(1) lateritic nickel ore, reduction coal and additive addition dispensing mixing device is carried out batch mixing and dispensing processes, obtain mixture
Material.
According to embodiments of the invention, described system includes dispensing mixing device, is used for lateritic nickel ore, reduction coal and adds
Add agent and carry out batch mixing and dispensing process, obtain mixed material.In some embodiments of the invention, the laterite nickel in described system
Ore deposit is lateritic nickel ore with the weight proportion of reduction coal and additive: reduction coal: additive=100:10-40:3-15.Because, when
The weight proportion of raw material lateritic nickel ore, reduction coal and additive is positioned at above-mentioned scope, and cinder viscosity can be made low, thus, favorably
In the gathering of ferronickel granule with grow up.According to embodiments of the invention, reduction coal in described system and the kind of additive are not
Particularly limited, as long as can be used in carrying out pyrolytic reaction.In some embodiments of the invention, described reduction coal is
Middle low-order coal, described additive be in alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali salt at least
A kind of.Further, the volatile matter of described reduction coal is not less than 20%, it is preferred that for brown coal.
(2) mixed material adds shaped device be shaped processing, obtain mixing pelletizing.
(3) mixing pelletizing addition drying device is dried process, obtains dry bulb group.
(4) dry bulb group is joined have pyrolysis and restoring function rotary hearth furnace in carry out being pyrolyzed and reduction treatment, obtain
Pyrolysis oil gas and metallized pellet.
According to a particular embodiment of the invention, the rotary hearth furnace described in pyrolysis and restoring function includes: the most adjacent
Feed zone, pyrolysis zone, reducing zone and discharge zone, wherein, described pyrolysis zone respectively and sets between described feed zone, described reducing zone
Having partition wall, be provided with barricade between described reducing zone and described discharge zone, described partition wall and described barricade are all by described rotary hearth furnace
Roof downwardly extend, and keep certain intervals with the cloth tray of described rotary hearth furnace.Described dry bulb group described have pyrolysis and
The rotary hearth furnace of restoring function carries out the reaction temperature of pyrolysis and reduction treatment: pyrolysis temperature 400-900 DEG C of pyrolysis zone, in institute
State reduction coal pyrolysis zone rolled into a ball by described dry bulb carry out pyrolysis processing obtain be pyrolyzed oil gas；The reduction temperature 1000-of reducing zone
1400 DEG C, in described reducing zone, the pelletizing after pyrolysis is reduced, to reach good reduction effect, finally give metallization
Pelletizing discharges rotary hearth furnace in discharge zone.Thus, this system can achieve the pyrolysis of coal at lateritic nickel ore Direct Reduction, and
And, the semicoke after pyrolysis continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace and obtains metallized pellet.
This system includes described device for recovering oil and gas, for by described rotary hearth furnace produce pyrolysis oil gas be collected and
Separating treatment, obtains tar and combustion gas, thus so that valuable petroleum resources is reclaimed, thus, add rotary hearth furnace coal base
The side-product of direct-reduction technique, reduces process energy consumption and cost indirectly.
(5) metallized pellet is added slag sluicing system device and carry out slag sluicing system process, obtain ferro-nickel product and tailings.Root
According to the specific embodiment of the present invention, described slag sluicing system device, for described metallized pellet is carried out slag sluicing system process, obtain
To ferro-nickel product and tailings.Thus, this system achieves the efficient recovery of lateritic nickel ore, has obtained ferro-nickel product.
Inventor finds, system structure according to embodiments of the present invention is simple, and easy to operate, this system can be at laterite nickel
Ore deposit Direct Reduction achieves the pyrolysis of coal, makes the petroleum resources of preciousness be reclaimed, thus, add rotary hearth furnace coal base straight
Connect the side-product of reducing process, reduce process energy consumption and cost.Meanwhile, the semicoke continuation after pyrolysis is participated in red in rotary hearth furnace
The direct reduction reactor of soil nickel minerals obtains metallized pellet.
Embodiment 1
By lateritic nickel ore (containing Ni 1.85%), bituminous coal (volatile matter 25%) and sodium carbonate 100:10:5 in mass ratio at blend ingredients
Carry out dispensing in device, mixing treatment obtains mixed material, and mixed material is shaped process in shaped device and is mixed
Pelletizing, is then dried mixing pelletizing process in drying device and obtains dry bulb group (aqueous 1.0%), by dry bulb group at tool
Have in the rotary hearth furnace of pyrolysis and restoring function and carry out being pyrolyzed and reduction treatment, pyrolysis zone annulus angle 30, pyrolysis zone temperature 500
DEG C, reducing zone annulus angle 300, reducing zone temperature 1250 DEG C, the pyrolysis oil gas obtained is processed by device for recovering oil and gas and obtains Jiao
Oil and combustion gas, metallized pellet feeding slag sluicing system device carries out slag sluicing system process and obtains 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 matter 40%) and limestone 100:25:15 in mass ratio at blend ingredients
Carry out dispensing in device, mixing treatment obtains mixed material, and mixed material is shaped process in shaped device and is mixed
Pelletizing, is then dried mixing pelletizing process in drying device and obtains dry bulb group (aqueous 1.5%), by dry bulb group at tool
Have in the rotary hearth furnace of pyrolysis and restoring function and carry out being pyrolyzed and reduction treatment, pyrolysis zone annulus angle 40, pyrolysis zone temperature 650
DEG C, reducing zone annulus angle 290, reducing zone temperature 1300 DEG C, the pyrolysis oil gas obtained is processed by device for recovering oil and gas and obtains Jiao
Oil and combustion gas, metallized pellet feeding slag sluicing system device carries out slag sluicing system process and obtains 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 matter 35%) and Calx 100:40:9 in mass ratio at blend ingredients
Carry out dispensing in device, mixing treatment obtains mixed material, and mixed material is shaped process in shaped device and is mixed
Pelletizing, is then dried mixing pelletizing process in drying device and obtains dry bulb group (aqueous 0.5%), by dry bulb group at tool
Have in the rotary hearth furnace of pyrolysis and restoring function and carry out being pyrolyzed and reduction treatment, pyrolysis zone annulus angle 50, pyrolysis zone temperature 850
DEG C, reducing zone annulus angle 280, reducing zone temperature 1400 DEG C, the pyrolysis oil gas obtained is processed by device for recovering oil and gas and obtains Jiao
Oil and combustion gas, metallized pellet feeding slag sluicing system device carries out slag sluicing system process and obtains 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 matter 25%) and sodium carbonate 100:15:5 in mass ratio at blend ingredients
Carry out dispensing in device, mixing treatment obtains mixed material, and mixed material is shaped process in shaped device and is mixed
Pelletizing, is then dried mixing pelletizing process in drying device and obtains dry bulb group (aqueous 1.0%), by dry bulb group at tool
Have in the rotary hearth furnace of pyrolysis and restoring function and carry out being pyrolyzed and reduction treatment, pyrolysis zone annulus angle 60, pyrolysis zone temperature 500
DEG C, reducing zone annulus angle 270, reducing zone temperature 1200 DEG C, the pyrolysis oil gas obtained is processed by device for recovering oil and gas and obtains Jiao
Oil and combustion gas, carry out melting separating treatment at 1450 DEG C and obtain dilval (containing Ni during metallized pellet feeding electric arc furnace is interior
18.62%, TFe 79.73%) and ferronickel slag, whole flow process nickel recovery 96%.
Embodiment 5
By lateritic nickel ore (containing Ni 2.45%), brown coal (volatile matter 40%) and limestone 100:20:15 in mass ratio at blend ingredients
Carry out dispensing in device, mixing treatment obtains mixed material, and mixed material is shaped process in shaped device and is mixed
Pelletizing, is then dried mixing pelletizing process in drying device and obtains dry bulb group (aqueous 1.5%), by dry bulb group at tool
Have in the rotary hearth furnace of pyrolysis and restoring function and carry out being pyrolyzed and reduction treatment, pyrolysis zone annulus angle 80, pyrolysis zone temperature 600
DEG C, reducing zone annulus angle 250, reducing zone temperature 1300 DEG C, the pyrolysis oil gas obtained is processed by device for recovering oil and gas and obtains Jiao
Oil and combustion gas, metallized pellet is sent into and is carried out melting separating treatment in molten point of stove of combustion gas at 1550 DEG C and obtain dilval and (contain
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 matter 35%) and Calx 100:35:9 in mass ratio at blend ingredients
Carry out dispensing in device, mixing treatment obtains mixed material, and mixed material is shaped process in shaped device and is mixed
Pelletizing, is then dried mixing pelletizing process in drying device and obtains dry bulb group (aqueous 0.5%), by dry bulb group at tool
Have in the rotary hearth furnace of pyrolysis and restoring function and carry out being pyrolyzed and reduction treatment, pyrolysis zone annulus angle 90, pyrolysis zone temperature 700
DEG C, reducing zone annulus angle 240, reducing zone temperature 1400 DEG C, the pyrolysis oil gas obtained is processed by device for recovering oil and gas and obtains Jiao
Oil and combustion gas, carry out melting separating treatment at 1650 DEG C in metallized pellet feeding mineral hot furnace and obtain dilval (containing Ni
15.35%, TFe 82.83%) and tailings, whole flow process nickel recovery 98%.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include one or more this feature.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to concrete feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification, simultaneously for one of ordinary skill in the art, according to the think of of the application
Think, the most all will change.
Claims (8)
1. the pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system, it is characterised in that including: dispensing mixing device, one-tenth
Type device, drying device, have pyrolysis and the rotary hearth furnace of restoring function, device for recovering oil and gas and slag sluicing system device；
Described dispensing mixing device includes: lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material outlet, uses
In lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain mixed material；
Described shaped device includes: mixed material entrance and mixing pelletizing outlet, described mixed material entrance and described mixture
Material outlet is connected, and for described mixed material is shaped process, obtains mixing pelletizing；
Described drying device includes: mixing pelletizing entrance and the outlet of dry bulb group, described mixing pelletizing entrance mixes pelletizing with described
Outlet is connected, and for described mixing pelletizing is dried process, obtains dry bulb group；
The described rotary hearth furnace with pyrolysis and restoring function includes: the most adjacent feed zone, pyrolysis zone, reducing zone and discharging
District, wherein, described pyrolysis zone respectively and is provided with partition wall between described feed zone, described reducing zone, described reducing zone with described go out
Material district between be provided with barricade, described partition wall and described barricade are all to be downwardly extended by the roof of described rotary hearth furnace, and with described turn
The cloth tray of end stove keeps certain intervals；Wherein, it is provided with inside furnace wall, described pyrolysis zone and multiple adds heat pipe, for described pyrolysis
District carries out adding heat pipe mode and heats；Described reducing zone is provided with multiple burner inside furnace wall, for described reducing zone is carried out burner
Mode heats；Described feed zone furnace wall is provided with dry bulb group entrance, and furnace wall, described pyrolysis zone is provided with pyrolysis oil gas vent, described
Furnace wall, discharge zone is provided with metallized pellet outlet, and described dry bulb group entrance exports with described dry bulb group and is connected；
Described device for recovering oil and gas includes: pyrolysis oil gas entrance, tar outlet and gas outlet, described pyrolysis oil gas entrance and institute
State pyrolysis oil gas vent to be connected, for being collected and separating treatment by described pyrolysis oil gas, obtain tar and combustion gas；
Described slag sluicing system device includes: the outlet of metallized pellet entrance, ferro-nickel product and tailings outlet, described metallized pellet
Entrance is connected with the outlet of described metallized pellet, for described metallized pellet is carried out slag sluicing system process, obtains ferronickel and produces
Product and tailings.
A kind of system utilizing lateritic nickel ore pyrolysis and reduction reaction the most according to claim 1, it is characterised in that described
The horizontal cross-section of the rotary hearth furnace with pyrolysis and restoring function is annular, the annulus angle 30-100 of described pyrolysis zone.
A kind of system utilizing lateritic nickel ore pyrolysis and reduction reaction the most according to claim 1, it is characterised in that described
The horizontal cross-section of the rotary hearth furnace with pyrolysis and restoring function is annular, the annulus angle 240-300 of described reducing zone.
4. utilize the system described in any one of claim 1-3 to carry out lateritic nickel ore pyrolysis and a method for reduction reaction, its
It is characterised by, comprises the following steps:
(1) lateritic nickel ore, reduction coal and additive addition dispensing mixing device is carried out batch mixing and dispensing processes, obtain mixture
Material；
(2) mixed material adds shaped device be shaped processing, obtain mixing pelletizing；
(3) mixing pelletizing addition drying device is dried process, obtains dry bulb group；
(4) dry bulb group is joined have pyrolysis and restoring function rotary hearth furnace in carry out being pyrolyzed and reduction treatment, be pyrolyzed
Oil gas and metallized pellet；
(5) metallized pellet is added slag sluicing system device and carry out slag sluicing system process, obtain ferro-nickel product and tailings.
Method the most according to claim 4, it is characterised in that the reduction coal in described step (1) is middle low-order coal, volatilization
Divide and be not less than 20%, preferably brown coal.
Method the most according to claim 4, it is characterised in that the additive in described step (1) is selected from alkali metal oxygen
At least one in compound, alkali metal salt, alkaline earth oxide and alkali salt.
Method the most according to claim 4, it is characterised in that the lateritic nickel ore in described step (1) and reduction coal and add
The weight proportion adding agent is lateritic nickel ore: reduction coal: additive=100:10-40:3-15.
Method the most according to claim 4, it is characterised in that in described step (4), dry bulb group has pyrolysis and reduction
The rotary hearth furnace of function carries out the reaction temperature of pyrolysis and reduction treatment: pyrolysis temperature 400-900 DEG C, reduction temperature 1000-
1400℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610819162.7A CN106191464B (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610819162.7A CN106191464B (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106191464A true CN106191464A (en) | 2016-12-07 |
| CN106191464B CN106191464B (en) | 2018-07-10 |
Family
ID=58067469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610819162.7A Active CN106191464B (en) | 2016-09-13 | 2016-09-13 | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106191464B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083478A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | A kind of utilization red mud prepares the method and system of metallized pellet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010007182A (en) * | 2008-05-30 | 2010-01-14 | Jfe Steel Corp | Method for producing reduced iron |
| CN102634621A (en) * | 2012-04-09 | 2012-08-15 | 北京神雾环境能源科技集团股份有限公司 | Device and method for treating refractory iron ore |
| CN103667742A (en) * | 2013-09-16 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN103667675A (en) * | 2013-08-01 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN103667743A (en) * | 2013-09-16 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| 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 |
| CN105907405A (en) * | 2016-06-15 | 2016-08-31 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating low-rank coal and iron-containing materials |
| CN206069974U (en) * | 2016-09-13 | 2017-04-05 | 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 |
-
2016
- 2016-09-13 CN CN201610819162.7A patent/CN106191464B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010007182A (en) * | 2008-05-30 | 2010-01-14 | Jfe Steel Corp | Method for producing reduced iron |
| CN102634621A (en) * | 2012-04-09 | 2012-08-15 | 北京神雾环境能源科技集团股份有限公司 | Device and method for treating refractory iron ore |
| CN103667675A (en) * | 2013-08-01 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN103667742A (en) * | 2013-09-16 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN103667743A (en) * | 2013-09-16 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| 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 |
| CN105907405A (en) * | 2016-06-15 | 2016-08-31 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating low-rank coal and iron-containing materials |
| CN206069974U (en) * | 2016-09-13 | 2017-04-05 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083478A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | A kind of utilization red mud prepares the method and system of metallized pellet |
| CN107083478B (en) * | 2017-05-25 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of method and system preparing metallized pellet using red mud |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106191464B (en) | 2018-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101538632B (en) | Preparation process and device of sponge iron | |
| CN104404189B (en) | Utilize the method that chromite powder two-step method melting and reducing produces ferrochrome | |
| CN110195156A (en) | A kind of iron ore rotary kiln coal base hydrogen metallurgical technology and its device | |
| CN106893867A (en) | A kind of method that muffle shaft furnace treatment feed powder containing zinc-iron dirt reclaims zinc | |
| CN105908061A (en) | Method for producing high-carbon ferrochrome | |
| CN101575654B (en) | Process and device for preparing iron alloy containing nickel and nickel-chromium | |
| CN104152165A (en) | Gas cycle coal full-particle diameter grading, pyrolyzing and coupling metallurgy reduction technology and system thereof | |
| CN106244758A (en) | A kind of system and method efficiently utilizing body of heater fume afterheat to process iron-containing resource | |
| CN102689882A (en) | Method for producing yellow phosphorus by virtue of low grade phosphate rotary hearth furnace method | |
| CN106282468B (en) | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group | |
| CN102409126A (en) | Integrated reduction ironmaking furnace and integrated reduction ironmaking process | |
| CN104878148A (en) | High reducing atmosphere rotary hearth furnace iron making method | |
| CN105087913B (en) | The metallurgical method of pellet | |
| CN106191464B (en) | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method | |
| 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 | |
| CN206069974U (en) | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system | |
| CN206069973U (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system | |
| CN205990417U (en) | A kind of pyrolysis of high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system | |
| 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 | |
| CN205990419U (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore block and reduction reaction system | |
| CN110184405A (en) | A kind of method and device thereof using acid carbonaceous metallized pellet production molten iron | |
| 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 | |
| CN106222355A (en) | The pyrolysis of a kind of high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system and method | |
| CN205990416U (en) | A kind of utilization body of heater fume afterheat the system of high efficiente callback iron-containing resource | |
| CN206279226U (en) | The system for processing iron content greasy filth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20180710 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20180710 |
|
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20220102 Granted publication date: 20180710 |