CN207537512U - Utilize the system of laterite nickel ore and producing ferronickel alloy - Google Patents
Utilize the system of laterite nickel ore and producing ferronickel alloy Download PDFInfo
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- CN207537512U CN207537512U CN201721278736.0U CN201721278736U CN207537512U CN 207537512 U CN207537512 U CN 207537512U CN 201721278736 U CN201721278736 U CN 201721278736U CN 207537512 U CN207537512 U CN 207537512U
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Abstract
The utility model discloses using laterite nickel ore and producing ferronickel alloy system, including：Material processing device, rotary hearth furnace, hot sending device and smelting apparatus, wherein, rotary hearth furnace includes：The furnace body of annular limits furnace chamber in furnace body, and the feed zone to communicate with each other, preheating zone, reducing zone and discharge zone are limited in furnace chamber, and feed zone has feed inlet, and feed inlet is connected with molding materials outlet, and discharge zone is with discharge port；Siege, siege are located in furnace chamber, and siege passes through feed zone, preheating zone, reducing zone and discharge zone successively for carrying material；And the charging portion for adding in antioxidant into discharge zone, hot sending device are connected with discharge port；Smelting apparatus has metallized pellet entrance, ferronickel outlet and tailings outlet, and metallized pellet entrance is connected with hot sending device.Metallized pellet can be effectively prevent to be reoxidized in transmission process using the system, and follow-up melting condition can be effectively improved, reduce production process energy consumption.
Description
Technical field
The utility model is related to chemical industry metallurgical fields.In particular, the utility model is related to produce nickel using lateritic nickel ore
The system of ferroalloy.
Background technology
Nickel is a kind of important non-ferrous metal, mainly has lateritic nickel ore and nickel sulfide ore to smelt.Due to nickel in recent years
Consumption be continuously increased and nickel sulfide ore reserves are constantly reduced, the exploitation of nickel laterite is paid more and more attention.Lateritic nickel ore
Treatment process wet method or thermal process can be used according to mineral difference handle, the technique side of the pyrometallurgical smelting dilval of use
It is seriously polluted there are process environments in method, high energy consumption, the deficiencies such as heat utilization efficiency is low；In recent years, some experts and scholar in the industry
It is proposed " coal base rotary hearth furnace reduction+melting " process, the gold that rotary hearth furnace reduction temperature obtains after 1200-1400 DEG C, reduction
Category pellet drains into batch can through discharge gate and is heat-fed again to smelting furnace, further obtains dilval.Due to metallized pellet temperature
Higher, dump temperature is mostly 800-1100 degrees Celsius, and metallized pellet easily occurs again during discharge and hot sending to smelting furnace
Oxidation so as to reduce pelletizing degree of metalization and temperature, and then leads to fusion process process energy consumption height, the low problem of product index.
It would therefore be highly desirable to develop it is a kind of can effectively prevent metal pelletizing reoxidize and can high efficiente callback ferronickel new technology,
New process, new equipment, this will be that coal-based direct reduction processing lateritic nickel ore research needs the critical issue solved.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is to propose the system using laterite nickel ore and producing ferronickel alloy with a novel purpose, by using the utility model
Metallized pellet can be effectively prevent to be reoxidized in transmission process using the system of laterite nickel ore and producing ferronickel alloy, and can be with
Follow-up melting condition is effectively improved, reduces production process energy consumption.
One side according to the present utility model utilizes laterite nickel ore and producing ferronickel alloy the utility model proposes a kind of
System.Specific embodiment according to the present utility model, this is included using the system of laterite nickel ore and producing ferronickel alloy：At raw material
Device is managed, the material processing device has lateritic nickel ore entrance, reduction coal entrance, lime stone entrance and molding materials outlet；
Rotary hearth furnace, the rotary hearth furnace include：The furnace body of annular limits furnace chamber in the furnace body, limits in the furnace chamber and connect each other
Logical feed zone, preheating zone, reducing zone and discharge zone, the feed zone have feed inlet, the feed inlet and the molding
Material outlet is connected, and the discharge zone has discharge port；Siege, the siege are located in the furnace chamber, and the siege is used to carry
Material passes through the feed zone, the preheating zone, the reducing zone and the discharge zone successively；And for the discharging
The charging portion of antioxidant is added in area, is heat-fed device, the hot sending device is connected with the discharge port；Smelting apparatus, it is described
Smelting apparatus has metallized pellet entrance, ferronickel outlet and tailings outlet, and the metallized pellet entrance is filled with the hot sending
It puts connected.
As a result, in the system using laterite nickel ore and producing ferronickel alloy of the utility model embodiment, the rotary hearth furnace of use
For novel rotary hearth furnace, the charging portion for adding in antioxidant into the discharge zone is wherein provided in rotary hearth furnace, utilizes this
It charging portion can be by the high-temperature metal pellet surface spraying antioxidant that reduction roasting is handled, it is possible thereby to tentatively prevent
Metallized pellet is aoxidized in transmission process, while can also adjust slag system by the antioxidant of spraying, improves melting item
Part reduces smelting temperature and energy consumption.
In addition, the system using laterite nickel ore and producing ferronickel alloy according to the utility model above-described embodiment can also have
There is following additional technical characteristic：
In the utility model, the material processing device includes the breaker being sequentially connected, mixing arrangement, molding dress
It puts and drying unit.It is possible thereby to further improve lateritic nickel ore subsequent processing efficiency, ferro-nickel recovery rate is improved.
In the utility model, the charging portion be nozzle, the nozzle be suitable for using inert gas as carrier to it is described go out
Expect the mixing antioxidant of injection coal dust, lime stone on the metallized pellet in area.
In the utility model, the rotary hearth furnace further includes：Partition wall, the partition wall are located in the furnace body, the partition wall
For the discharge zone and the feed zone and the reducing zone to be separated.
Description of the drawings
Fig. 1 is shown according to the structure of the system using laterite nickel ore and producing ferronickel alloy of the utility model one embodiment
It is intended to.
Fig. 2 is shown according to the structure of the system using laterite nickel ore and producing ferronickel alloy of the utility model one embodiment
It is intended to.
Fig. 3 is rotary hearth furnace in the system using laterite nickel ore and producing ferronickel alloy according to the utility model one embodiment
Structure diagram.
Fig. 4 is the system production dilval using laterite nickel ore and producing ferronickel alloy using the utility model embodiment
Method flow diagram.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that the utility model
Limitation.
One side according to the present utility model utilizes laterite nickel ore and producing ferronickel alloy the utility model proposes a kind of
System.The system using laterite nickel ore and producing ferronickel alloy of the utility model specific embodiment is carried out below with reference to Fig. 1
Detailed description.Specific embodiment according to the present utility model, this is included using the system of laterite nickel ore and producing ferronickel alloy：Raw material
Processing unit 100, rotary hearth furnace 200, hot sending device 300 and smelting apparatus 400.
Wherein, the material processing device 100 has lateritic nickel ore entrance 110, reduction coal entrance 120, lime stone entrance
130 and molding materials outlet 104.
The rotary hearth furnace 200 includes furnace body 210, siege 220 and the charging portion 230 of annular, limiting in the furnace body 210
Furnace chamber 211 limits the feed zone 212 to communicate with each other, preheating zone 213, reducing zone 214 and discharge zone 215, institute in the furnace chamber
Feed zone 212 is stated with feed inlet 216, the feed inlet 216 is connected with molding materials outlet 104, the discharge zone 215
With discharge port 217；The siege 220 is located in the furnace chamber 211, the siege 220 for carry material successively pass through into
Expect area 212, preheating zone 213, reducing zone 214 and discharge zone 215；Charging portion 230 is used to add in antioxygen into the discharge zone 215
Agent.
Hot sending device 300 is connected with the discharge port 217.
Smelting apparatus 400 has metallized pellet entrance 410, ferronickel outlet 420 and tailings outlet 430, the metallization
Pelletizing entrance 410 is connected with the hot sending device 300.
As a result, in the system using laterite nickel ore and producing ferronickel alloy of the utility model embodiment, the rotary hearth furnace of use
For novel rotary hearth furnace, the charging portion for spraying into antioxidant into the discharge zone is wherein provided in rotary hearth furnace, utilizes this
It charging portion can be by the high-temperature metal pellet surface spraying antioxidant that reduction roasting is handled, it is possible thereby to tentatively prevent
Metallized pellet is aoxidized in transmission process, while can also adjust slag system by the antioxidant of spraying, improves melting item
Part reduces smelting temperature and energy consumption.
Below with reference to the accompanying drawings 1-3 carries out the system using laterite nickel ore and producing ferronickel alloy of the utility model embodiment
Detailed description.
Material processing device 100
Specific embodiment according to the present utility model, as shown in Fig. 2, material processing device 100 is broken including what is be sequentially connected
Crushing device 110, mixing arrangement 120, molding machine 130 and drying unit 140.It thus can be right respectively using breaker 110
Lateritic nickel ore, reduction coal and lime stone carry out break process, to obtain appropriate particle size, and then can further improve follow-up mixed
The rate of recovery of ferronickel in synthesis type and reducing roasting process.Further, mixing arrangement 120, molding machine 130 and baking are utilized
Equipment for drying 140 carries out mixed-forming and drying and processing to lateritic nickel ore, reduction coal and the lime stone after break process, so as to
To molding materials.Raw materials laterite nickel ore, reduction coal and lime stone are handled by above-mentioned raw materials processing unit 100 as a result,
Lateritic nickel ore subsequent processing efficiency can be further improved by obtaining molding materials, improve ferro-nickel recovery rate.
Rotary hearth furnace 200
Specific embodiment according to the present utility model, below with reference to the utilization laterite of Fig. 1-3 pairs of the utility model embodiments
Rotary hearth furnace in the system of nickel minerals production dilval is described in detail.
Specific embodiment according to the present utility model, the rotary hearth furnace 200 include annular furnace body 210, siege 220 and add
Material portion 230 limits furnace chamber 211 in the furnace body 210, the feed zone 212 to communicate with each other, preheating zone is limited in the furnace chamber
213rd, reducing zone 214 and discharge zone 215, the feed zone 212 have feed inlet 216, the feed inlet 216 and the molding
Material outlet 104 is connected, and the discharge zone 215 has discharge port 217；The siege 220 is located in the furnace chamber 211, the stove
Bed 220 passes through feed zone 212, preheating zone 213, reducing zone 214 and discharge zone 215 successively for carrying material；Charging portion 230 uses
In adding in antioxidant into the discharge zone 215.
Specific embodiment according to the present utility model, rotary hearth furnace 200 further include：Partition wall 240, the partition wall 240 are located at institute
It states in furnace body 210, the partition wall 240 is used to separate the discharge zone 215 and the feed zone 212 and the reducing zone 214.
Discharge zone 215 from there through setting partition wall is in the space being relatively isolated, is resisted when charging portion 230 is added in into discharge zone 215
When oxidant is carried out plus is protected to metallized pellet, it is ensured that the normal discharging of rotary hearth furnace, while can also avoid anti-oxidant
Agent, which enters feed zone 212 and reducing zone 214, influences the normal work in above-mentioned twoth area, it is possible thereby to avoid to the temperature in reducing zone
It is impacted with atmosphere.Certainly, partition wall 240 may be formed as other forms, such as partition wall 240 is formed as cylindrical surface and will discharge
215 be wrapped in.Need additional description, partition wall 240 can be formed as tabular, can also be formed as arc-shaped etc. other
Shape does not make limitation to the concrete shape of partition wall 240 herein.
Specific embodiment according to the present utility model, discharge zone 215 are the micro-positive pressure area of air pressure 20pa-50pa.
Specific embodiment according to the present utility model, the discharge zone 215 is in the entirely annular furnace chamber 211 of the furnace body
Central angle is 20 ° -40 °.It should be noted that if central angle is smaller, material is too short in 215 remaining time of discharge zone, gold
The temperature for belonging to pellet is unable to rapid decrease, larger to the pressure for the spiral that discharges, and is likely to cause material bonding, influences to produce
Direct motion；But if central angle is larger, then the size of reducing zone 214 can be reduced, influence the reduction effect of material.In conclusion go out
Material area 215 can be controlled in 20 ° -40 ° in the central angle of the annular furnace chamber 211 of entire furnace body 210, can both ensure that material was suitable in this way
Smooth discharge, and can ensure the reduction effect of material.Certainly, discharge zone 215 is in the annular furnace chamber 211 of entire furnace body 210
Heart angle is not limited to above range, and user can make appropriate adjustment according to actual needs.
Specific embodiment according to the present utility model is located at reducing zone 214 on furnace body 210 and is equipped with burner 250, furnace body 210
The upper preheating zone 213 that is located at is equipped with smoke outlet 260.Inner flue gas of the stove is discharged from smoke outlet 260 as a result, and fume afterheat recycling can be used
In preheating gas combustion air and Secondary Air so that flue gas has obtained secondary use, reduces energy loss.
Specific embodiment according to the present utility model, charging portion 230 are filled with the mixing of coal dust and lime stone to discharge zone 215
Antioxidant.It should be noted that lime stone is decomposed at high temperature and coal gasification reaction needs a large amount of heat, reduce
The temperature of metallized pellet, the metallized pellet that temperature reduces are not easy to be bonded mutually.In addition, the decomposition product of lime stone is oxygen
Change calcium, calcium oxide is attached on metallized pellet, can not only be prevented in transport and during being subsequently packed into other smelting apparatus
Only metallized pellet reoxidizes, and when can also continue smelting technology after entering, improves the melting condition of metallized pellet, drop
Low smelting temperature and energy consumption.Certainly in the embodiment of the utility model, antioxidant is not limited to lime stone and coal
Powder can also be other industrial antioxidants.
In some embodiments, antioxidant is covered in surface of material by charging portion 230.It is understood that by antioxygen
Agent be covered in surface of material can not only prevent discharging during metallized pellet reoxidize, can also transport and after
During continuous other smelting apparatus of loading, prevent metallized pellet from reoxidizing.
In some optional embodiments, charging portion 30 is nozzle, and nozzle is carrier towards discharge zone 215 using inert gas
The mixing antioxidant of interior injection coal dust, lime stone.It should be noted that the cooling-down effect of metallized pellet mainly by with
What lower means were realized：Decomposition of limestone is reacted and the gasification reaction of carbon is the endothermic reaction, and inert gas is sprayed onto metallization ball
Its temperature can be down to 1100 DEG C hereinafter, ensureing that metallized pellet steadily discharges, metallized pellet will not be adhered by group.This
Outside, when inert gas is sprayed onto metallized pellet, metallized pellet is surrounded by inert gas, while the gasification reaction of carbon can produce
First portion carbon monoxide, the CO gas of generation are also enclosed in around metallized pellet, and discharge zone is integrally filled with as a result,
Weak reducing atmosphere so that metallized pellet is in weak reducing atmosphere, so as to effectively prevent metallized pellet again
Oxidation.When lime stone is sprayed onto metallized pellet surface, under the high temperature action of metallized pellet, lime stone is decomposed reaction
Calcium oxide is generated, the calcium oxide of generation is coated on the surface of metallized pellet, and the calcium oxide clad generated in this way can not only
Prevent metallized pellet from being aoxidized during discharging, additionally it is possible to metallized pellet be prevented to be packed into smelting apparatus in subsequent thermal
It aoxidizes in the process, meanwhile, in fusion process, such calcium oxide clad plays the role of slag adjusting agent, without volume
It is outer to add in calcareous slag adjusting agent, and melting condition can be improved, reduce smelting temperature and energy consumption.
Specific embodiment according to the present utility model, inert gas can be strong cold inert gas.The relatively low inertia of temperature
Gas can not only reduce the temperature of high-temperature metal pellet, can also prevent metallized pellet from aoxidizing to a certain extent.
It is heat-fed device 300
Specific embodiment according to the present utility model, hot sending device 300 are connected with the discharge port 217.It is filled using hot sending
The temperature of metallized pellet can be kept by putting 300, and then can be that energy consumption is saved in follow-up melting processing, reduced melting and be processed into
This.
Smelting apparatus 400
There is metallized pellet entrance 410, ferronickel to export for specific embodiment according to the present utility model, smelting apparatus 400
420 and tailings outlet 430, the metallized pellet entrance 410 with it is described be heat-fed device 300 be connected.
Specifically, the surface of metallized pellet that hot sending device 300 conveys is formed with antioxidant protection layer, lime stone
Reaction of decomposing generates calcium oxide.Therefore, melting processing is carried out to above-mentioned metallized pellet using smelting apparatus 400 and carries nickel
Iron, slag adjusting agent can be played the role of, and then in melting processing procedure by being coated on the cao layers on metallized pellet surface
It is not required to additionally add in calcareous slag adjusting agent, and melting condition can be improved, reduces smelting temperature and energy consumption.Therefore this practicality
In the system using laterite nickel ore and producing ferronickel alloy of novel above-described embodiment, rotary hearth furnace 200, hot sending device 300 are combined
Smelting apparatus 400 has not only reached the oxidation for preventing metallized pellet in transmission process, while has further reduced at melting
The cost and energy consumption of reason.
The system using laterite nickel ore and producing ferronickel alloy of the utility model above-described embodiment, wherein for reduction roasting
The rotary hearth furnace of material pelletizing be transformation New Regenerative rotary hearth furnace, including feed zone adjacent successively, preheating zone, reducing zone and
Discharge zone, wherein, partition wall is set between the discharge zone and reducing zone, the discharge zone and cloth area setting partition wall, it is described every
Wall is extended downwardly by the roof of the rotary hearth furnace, and keeps certain intervals with the cloth ring-shaped furnace bottom of the rotary hearth furnace；It uses
Material area is in relatively independent space, and sets nozzle in soaking discharge zone furnace roof, can be by coal dust, limestone mix material using strong
Cold inert gas is sprayed onto surface of material for carrier, can using strong cold inert gas and decomposition of limestone, the gasification reaction heat absorption of carbon
Metallized pellet temperature is made to be down to 1100 DEG C hereinafter, ensureing that metallized pellet steadily discharges, in addition in inert gas environment and carbon
Gasification reaction generate part CO so that soaking discharge zone be in weakly reducing atmosphere, reoxidizing for metallized pellet can be effectively prevent；
The CaO that decomposition of limestone generates is wrapped in metallized pellet surface, and melting is packed into metallized pellet discharging process and subsequent thermal
Also reoxidizing for metallized pellet can be prevented during device, and adds in a certain amount of CaO in fusion process and can adjust slag system,
Improve melting condition, assemble conducive to ferronickel, reduce smelting temperature and energy consumption.
In order to facilitate the system using laterite nickel ore and producing ferronickel alloy of the utility model above-described embodiment, below with reference to
The method that Fig. 4 carries out the system using laterite nickel ore and producing ferronickel alloy using preceding embodiment production dilval carries out
Description.
Specific embodiment according to the present utility model, this method include：Using the material processing device by lateritic nickel ore,
Reduction coal, lime stone are located in advance, to obtain molding materials；
The molding materials are distributed into the rotary hearth furnace, and make the molding materials successively by the preheating zone, institute
It states reducing zone and the discharge zone to carry out reduction roasting processing and add protective layer processing, to obtain metallized pellet；
The metallized pellet is heat-fed to progress melting processing in the smelting apparatus using the hot sending device, so as to
Obtain ferro-nickel product and tailings.
As a result, in the method using laterite nickel ore and producing ferronickel alloy of the utility model embodiment, the rotary hearth furnace of use
For novel rotary hearth furnace, the charging portion for adding in antioxidant into the discharge zone is wherein provided in rotary hearth furnace, utilizes this
It charging portion can be by the high-temperature metal pellet surface spraying antioxidant that reduction roasting is handled, it is possible thereby to tentatively prevent
Metallized pellet is aoxidized in transmission process, while can also adjust slag system by the antioxidant of spraying, improves melting item
Part reduces smelting temperature and energy consumption.
The method using laterite nickel ore and producing ferronickel alloy of the utility model specific embodiment is described below.
Specific embodiment according to the present utility model, using the material processing device by lateritic nickel ore, reduction coal, lime
Stone is pre-processed, to obtain molding materials.
The pretreatment is included at the lateritic nickel ore, the reduction coal, lime stone progress break process, mixing
Reason, forming processes and drying process.Specifically, it can utilize first using breaker 110 respectively to lateritic nickel ore, reduction coal
Break process is carried out with lime stone, to obtain appropriate particle size, and then follow-up mixed-forming and reduction can be further improved
The rate of recovery of iron in roasting process.It is possible to further right using mixing arrangement 120, molding machine 130 and drying unit 140
Lateritic nickel ore, reduction coal and lime stone after break process carry out mixed-forming and drying and processing, to obtain molding materials.
As a result, raw materials laterite nickel ore, reduction coal and lime stone are handled to obtain molding materials by above-mentioned raw materials processing unit 100
Lateritic nickel ore subsequent processing efficiency can be further improved, improves ferro-nickel recovery rate.
Specific embodiment according to the present utility model, the quality of the lateritic nickel ore, the reduction coal and the lime stone
Than being 100：(10-20)：(8-15).It is possible thereby to further improve ferro-nickel recovery rate.From there through by laterite nickel described in raw material
Ore deposit, the reduction coal and the lime stone are mixed according to above-mentioned mass ratio, can significantly improve ferro-nickel recovery rate.
The molding materials are distributed into the rotary hearth furnace by specific embodiment according to the present utility model, and make it is described into
Type material carries out reduction roasting processing by the preheating zone, the reducing zone and the discharge zone successively and adds at protective layer
Reason, to obtain metallized pellet.Reduction roasting is carried out to molding materials by using the rotary hearth furnace in preceding embodiment system
It handles and adds protective layer processing, specifically, molding materials are preheated in preheating zone, and reduction is calcined in reducing zone, into one
Step ground is carried out in discharge zone plus protective layer processing.
Specific embodiment according to the present utility model, specific embodiment according to the present utility model, charging portion 230 is to discharging
Area 215 is filled with the mixing antioxidant of coal dust and lime stone, and then forms protective layer on the surface of metallized pellet.It needs to illustrate
, lime stone is decomposed at high temperature and coal gasification reaction needs a large amount of heat, reduces the temperature of metallized pellet
Degree, the metallized pellet that temperature reduces are not easy to be bonded mutually.In addition, the decomposition product of lime stone is calcium oxide, calcium oxide attachment
On metallized pellet, not only metallized pellet can be prevented in transport and during being subsequently packed into other smelting apparatus
It reoxidizes, when can also continue smelting technology after entering, improves the melting condition of metallized pellet, reduce smelting temperature and production
Energy consumption.Certainly in the embodiment of the utility model, antioxidant is not limited to lime stone and coal dust, can also be other works
Industry antioxidant.
In some embodiments, antioxidant is covered in surface of material by charging portion 230.It is understood that by antioxygen
Agent be covered in surface of material can not only prevent discharging during metallized pellet reoxidize, can also transport and after
During continuous other smelting apparatus of loading, prevent metallized pellet from reoxidizing.
In some optional embodiments, charging portion 30 is nozzle, it is possible thereby to use nozzle and using inert gas as load
Body is towards the mixing antioxidant of injection coal dust, lime stone in discharge zone 215.It should be noted that the cooling of metallized pellet
What effect was mainly realized by the following means：Decomposition of limestone is reacted and the gasification reaction of carbon is the endothermic reaction, by inertia
Gas, which is sprayed onto metallized pellet, can be down to its temperature 1100 DEG C hereinafter, ensureing that metallized pellet steadily discharges, and metallize ball
Group will not be adhered.In addition, when inert gas is sprayed onto metallized pellet, metallized pellet is surrounded by inert gas, together
When carbon gasification reaction can generate part carbon monoxide, the CO gas of generation is also enclosed in around metallized pellet, by
This, discharge zone has integrally been filled with weak reducing atmosphere so that metallized pellet is in weak reducing atmosphere, so as to effectively anti-
Reoxidizing for metallized pellet is stopped.When lime stone is sprayed onto metallized pellet surface, under the high temperature action of metallized pellet,
Lime stone, which decomposes to react, generates calcium oxide, and the calcium oxide of generation is coated on the surface of metallized pellet, the oxygen generated in this way
Changing calcium clad can not only prevent metallized pellet from being aoxidized during discharging, additionally it is possible to prevent metallized pellet rear
Continuous hot charging aoxidizes during entering smelting apparatus, meanwhile, in fusion process, such calcium oxide clad plays residue adjustment
The effect of agent without additionally adding in calcareous slag adjusting agent, and can improve melting condition, reduce smelting temperature and production energy
Consumption.
Specific embodiment according to the present utility model, inert gas can be strong cold inert gas.The relatively low inertia of temperature
Gas can not only reduce the temperature of high-temperature metal pellet, can specifically be down to 1000 degrees Celsius hereinafter, can also be certain
Prevent metallized pellet from aoxidizing in degree.
Specific embodiment according to the present utility model as a result, the processing of above-mentioned plus protective layer can be by with strong cold inertness
Gas sprays the mixture of coal dust and lime stone for carrier on the metallized pellet into the discharge zone, so as in the metal
Pellet surface forms anti oxidation layer, and the temperature of the metallized pellet is down to less than 1100 DEG C.
Specific embodiment according to the present utility model, the straying quatity of the lime stone are heavy for the 8-15 of the metallized pellet
Measure %.Inventor has found, if the straying quatity of lime stone is too low, can not reach the good mesh for preventing metallized pellet from aoxidizing
, if the straying quatity of lime stone is excessively high, follow-up melting will not be handled and impacted, reduced melting treatment effeciency, be added to
This.
The metallized pellet is heat-fed to described by specific embodiment according to the present utility model using the hot sending device
Melting processing is carried out in smelting apparatus, to obtain ferro-nickel product and tailings.
Specifically, the surface of metallized pellet that hot sending device 300 conveys is formed with antioxidant protection layer, lime stone
Reaction of decomposing generates calcium oxide.Therefore, melting processing is carried out to above-mentioned metallized pellet using smelting apparatus 400 and carries nickel
Iron, slag adjusting agent can be played the role of, and then in melting processing procedure by being coated on the cao layers on metallized pellet surface
It is not required to additionally add in calcareous slag adjusting agent, and melting condition can be improved, reduces smelting temperature and energy consumption.Therefore this practicality
In the system using laterite nickel ore and producing ferronickel alloy of novel above-described embodiment, rotary hearth furnace 200, hot sending device 300 are combined
Smelting apparatus 400 has not only reached the oxidation for preventing metallized pellet in transmission process, while has further reduced at melting
The cost and energy consumption of reason.
The method using laterite nickel ore and producing ferronickel alloy of the utility model above-described embodiment, wherein for reduction roasting
The rotary hearth furnace that material pelletizing uses for be transformed New Regenerative rotary hearth furnace, including feed zone adjacent successively, preheating zone, reduction
Area and discharge zone, wherein, partition wall, the discharge zone and cloth area setting partition wall, institute are set between the discharge zone and reducing zone
It states partition wall to be extended downwardly by the roof of the rotary hearth furnace, and certain intervals is kept with the cloth ring-shaped furnace bottom of the rotary hearth furnace；
Discharge zone is made to be in relatively independent space, and nozzle is set in soaking discharge zone furnace roof, coal dust, limestone mix material can be adopted
It is that carrier is sprayed onto surface of material with strong cold inert gas, is inhaled using strong cold inert gas and decomposition of limestone, the gasification reaction of carbon
Heat can make metallized pellet temperature be down to 1100 DEG C hereinafter, ensureing that metallized pellet steadily discharges, in addition in inert gas environment
And the gasification reaction of carbon generates part CO so that soaking discharge zone is in weakly reducing atmosphere, can effectively prevent metallized pellet again
Oxidation；The CaO that decomposition of limestone generates is wrapped in metallized pellet surface, is packed into metallized pellet discharging process and subsequent thermal
Also reoxidizing for metallized pellet can be prevented during smelting apparatus, and adds in a certain amount of CaO in fusion process and can adjust
Slag system improves melting condition, assembles conducive to ferronickel, reduces smelting temperature and energy consumption.
Embodiment 1
TFe20.3% is selected, the lateritic nickel ore containing Ni 1.64%, according to 100 parts by weight of lateritic nickel ore, is gone back as raw material
10 parts by weight of raw coal, the weight ratio dispensing and mixing of 8 parts by weight of lime stone, molding, molding materials are distributed into successively also original-pack
Carry out reduction roasting is put, reduction apparatus soaking discharge zone setting nozzle, coal dust, limestone mix material use strong cold inert gas
Surface of material is sprayed onto for carrier, the straying quatity for controlling lime stone is the 15% of tapping metal pellet (weight), and reduction temperature is
1200 DEG C, time 40min, metallized pellet drop temperature is obtained after reduction less than 1100 DEG C；Using sealing hot sending after discharge
Device send metallized pellet to smelting apparatus, 1600 DEG C of smelting temperature, obtains dilval and tailings, the recycling of whole process nickel
Rate 95.28%.
Embodiment 2
TFe18.5% is selected, the lateritic nickel ore containing Ni 1.78%, according to 100 parts by weight of lateritic nickel ore, is gone back as raw material
15 parts by weight of raw coal, the weight ratio dispensing and mixing of 12 parts by weight of lime stone, molding, molding materials are distributed into successively also original-pack
Carry out reduction roasting is put, reduction apparatus soaking discharge zone setting nozzle, coal dust, limestone mix material use strong cold inert gas
Surface of material is sprayed onto for carrier, the straying quatity for controlling lime stone is the 10% of tapping metal pellet (weight), and reduction temperature is
1300 DEG C, time 30min, metallized pellet drop temperature is obtained after reduction less than 1100 DEG C；Using sealing hot sending after discharge
Device send metallized pellet to smelting apparatus, 1550 DEG C of smelting temperature, obtains dilval and tailings, the recycling of whole process nickel
Rate 96.31%.
Embodiment 3
TFe23.5% is selected, the lateritic nickel ore containing Ni 1.58%, according to 100 parts by weight of lateritic nickel ore, is gone back as raw material
20 parts by weight of raw coal, the weight ratio dispensing and mixing of 15 parts by weight of lime stone, molding, molding materials are distributed into successively also original-pack
Carry out reduction roasting is put, reduction apparatus soaking discharge zone setting nozzle, coal dust, limestone mix material use strong cold inert gas
Surface of material is sprayed onto for carrier, the straying quatity for controlling lime stone is the 8% of tapping metal pellet (weight), and reduction temperature is
1400 DEG C, time 20min, metallized pellet drop temperature is obtained after reduction less than 1100 DEG C；Using sealing hot sending after discharge
Device send metallized pellet to smelting apparatus, 1500 DEG C of smelting temperature, obtains dilval and tailings, the recycling of whole process nickel
Rate 95.72%.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It is combined in an appropriate manner in any one or more embodiments or example.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of the different embodiments or examples described in this specification and different embodiments or examples
With reference to and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it is impossible to be construed as a limitation of the present invention, those of ordinary skill in the art are in the scope of the utility model
It is interior to make changes, modifications, substitutions and variations to the above described embodiments.
Claims (5)
1. a kind of system using laterite nickel ore and producing ferronickel alloy, which is characterized in that including：
Material processing device, the material processing device have lateritic nickel ore entrance, reduction coal entrance, lime stone entrance and molding
Material outlet；
Rotary hearth furnace, the rotary hearth furnace include：
The furnace body of annular limits furnace chamber in the furnace body, limited in the furnace chamber feed zone to communicate with each other, preheating zone,
Reducing zone and discharge zone, the feed zone have feed inlet, and the feed inlet is connected with molding materials outlet, the discharging
Area has discharge port；
Siege, the siege are located in the furnace chamber, and the siege is for carrying material successively by the feed zone, described pre-
Hot-zone, the reducing zone and the discharge zone；And
For adding in the charging portion of antioxidant into the discharge zone,
Device is heat-fed, the hot sending device is connected with the discharge port；
Smelting apparatus, the smelting apparatus have metallized pellet entrance, ferronickel outlet and tailings outlet, the metallized pellet
Entrance is connected with the hot sending device.
2. the system according to claim 1 using laterite nickel ore and producing ferronickel alloy, which is characterized in that at the raw material
Reason device includes the breaker, mixing arrangement, molding machine and the drying unit that are sequentially connected.
3. the system according to claim 1 using laterite nickel ore and producing ferronickel alloy, which is characterized in that the charging portion
For nozzle, the nozzle be suitable for using sprayed on the metallized pellet that strong cold inert gas be carrier into the discharge zone coal dust,
The mixing antioxidant of lime stone.
4. the system according to claim 1 using laterite nickel ore and producing ferronickel alloy, which is characterized in that the rotary hearth furnace
It further includes：Partition wall, the partition wall are located in the furnace body, and the partition wall is used for the discharge zone and the feed zone and described
Reducing zone separates.
5. the system according to claim 1 using laterite nickel ore and producing ferronickel alloy, which is characterized in that the discharge zone
It it is 20 ° -40 ° in the central angle of the annular furnace chamber of the entire furnace body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721278736.0U CN207537512U (en) | 2017-09-29 | 2017-09-29 | Utilize the system of laterite nickel ore and producing ferronickel alloy |
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| CN201721278736.0U CN207537512U (en) | 2017-09-29 | 2017-09-29 | Utilize the system of laterite nickel ore and producing ferronickel alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408795A (en) * | 2019-08-19 | 2019-11-05 | 江苏宏航机械有限公司 | A kind of side-blown furnace smelting nickel-iron equipment of lateritic nickel ore |
-
2017
- 2017-09-29 CN CN201721278736.0U patent/CN207537512U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408795A (en) * | 2019-08-19 | 2019-11-05 | 江苏宏航机械有限公司 | A kind of side-blown furnace smelting nickel-iron equipment of lateritic nickel ore |
| CN110408795B (en) * | 2019-08-19 | 2021-05-18 | 江苏宏航机械有限公司 | Nickel iron smelting equipment with laterite nickel ore side-blown furnace |
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