CN205990420U - A kind of reduction reaction system of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group - Google Patents
A kind of reduction reaction system of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group Download PDFInfo
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- CN205990420U CN205990420U CN201621051924.5U CN201621051924U CN205990420U CN 205990420 U CN205990420 U CN 205990420U CN 201621051924 U CN201621051924 U CN 201621051924U CN 205990420 U CN205990420 U CN 205990420U
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Abstract
This utility model is related to chemical industry metallurgical field and in particular to a kind of system and method for the reduction reaction of process lateritic nickel ore.For the deficiencies in the prior art, the utility model proposes a kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group is it is achieved that the low-temperature reduction of lateritic nickel ore is smelted.In this system, the preheating zone of new rotary hearth furnace adopts heating tube to heat, and for burner heating, neither affects whole reducing process, can solve the problems, such as preheating zone fume amount big blocking burner it is achieved that the low-temperature reduction of lateritic nickel ore is smelted again.And, flue is located at low-temperature reduction area by described new rotary hearth furnace, the flue gas producing thermal source directly as preheating zone and low-temperature reduction area heating tube after dedusting, the fume afterheat achieving furnace interior generation can effectively be recycled, thus, this system achieves environmental protection, indirectly reduces process energy consumption and cost.
Description
Technical field
This utility model is related to chemical industry metallurgical field.Specifically, this utility model is related to a kind of process lateritic nickel ore
The system and method for reduction reaction.
Background technology
In recent years, with the fast development of the exhausted and domestic rustless steel industry of high-grade nickel sulfide ore, 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, using direct-reduction process, the ferrum in Ore and nickel has 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, because rotary hearth furnace reduction technique has, equipment is simple, operation
Easily, with short production cycle, response speed is fast, advantages of environment protection, so rotary hearth furnace reduction technique has caused widely
Concern.The ultimate principle of rotary hearth iron making is by the flat flame burner burning positioned at furnace sidewall, and the high temperature of flame is passed by radiation
Feed layer surface pelletizing, so that the metal-oxide in carbonaceous pelletizing is reduced at high temperature, heating energy source more adopt natural gas,
Cracked gas, coke-stove gas, coal gas of converter and coal gas etc., energy sources is quite varied.Using rotary hearth furnace equipment DRI
(DRI) technique mainly includes the following steps that：Iron Ore Powder is mixed homogeneously with reducing agent coal dust, is pressed into carbonaceous pelletizing ore deposit, dry；
The carbonaceous pelletizing being dried equably is layered on rotary hearth furnace, make reduced zone in rotary hearth furnace for the carbonaceous pelletizing (temperature up to
1300 DEG C -1400 DEG C) in be reduced 15min-30min, you can obtain the metallized pellet that degree of metalization is more than 85%.Turn bottom
The advantage that furnace apparatus are used for producing DRI is, reduction temperature is high, the time is short, furnace charge keeps relative transfixion with furnace bottom, from
And avoid the problems such as rotary kiln, fluid bed bonding, shaft furnace dross.Chinese patent CN102212636A discloses a kind of laterite nickel
The iron smelting method that point stove melts point is melted in ore deposit rotary hearth furnace coal-based direct reduction combustion gas, makes after lateritic nickel ore is mixed with coal and flux
Ball, dry bulb is distributed in rotary hearth furnace and carries out direct-reduction and obtain metallized pellet, and metallized pellet feeding coal gas makees the storage of fuel
Hot type combustion gas is melted a point stove and is carried out molten point, finally gives nickelic dilval.
In prior art, rotary hearth furnace includes preheating section, reduction section and cooling section（Or omission cooling section）Three sections.Enter
Material mouth is located at the preheating section of rotary hearth furnace, and is arranged on the annular space top of rotary hearth furnace.Discharging opening is located at the cooling section of rotary hearth furnace,
And it is arranged on the bottom of rotary hearth furnace.Carbonaceous pelletizing loads the bottom of the annular space of rotary hearth furnace from rotary hearth furnace charging aperture, enters stove
Carbonaceous pelletizing turns round through rotary hearth furnace, revolves one-turn and gradually completes reduction process, finally discharges metallized pellet from discharging opening.Existing
Rotary hearth furnace is had to process in lateritic nickel ore technology, during lateritic nickel ore pelletizing is distributed into rotary hearth furnace after drying, because cloth material mouth exists
There is certain difference in height in the annular space top of rotary hearth furnace and furnace bottom, so whole whereabouts cloth process is particularly easy to fragmentation simultaneously
Form volume of smoke, these flue dust will block the burner of preheating zone, and in the life-span of impact burner, when serious, even impact is entirely given birth to
Produce.Smelted additionally, stove pelletizing will be entered in existing rotary hearth furnace process lateritic nickel ore technology be rapidly heated more than 1300 DEG C, had
The superfluous shortcoming of Energy input.Therefore, existing rotary hearth furnace processes lateritic nickel ore technology and is further improved.
Utility model content
Process, for existing rotary hearth furnace, the volume of smoke that in lateritic nickel ore technology, lateritic nickel ore dry bulb cloth process produces to block up
Plug preheating zone burner and the problem of existing rotary hearth furnace energy dissipation, the utility model proposes a kind of fume afterheat furnace interior is again
The reduction reaction system and method rolled into a ball using type lateritic nickel ore dry bulb is it is achieved that the low-temperature reduction of lateritic nickel ore is smelted.This system
In new rotary hearth furnace preheating zone adopt heating tube heat, with respect to burner heating for, neither affect whole reducing process, and
Preheating zone fume amount big blocking burner can be solved the problems, such as it is achieved that the low-temperature reduction of lateritic nickel ore is smelted.And, it is described new
Flue is located at low-temperature reduction area by rotary hearth furnace, and the flue gas of generation heats directly as preheating zone and low-temperature reduction area after dedusting
The thermal source of pipe it is achieved that the fume afterheat that furnace interior produces can effectively be recycled, thus, this system achieves green ring
Protect, indirectly reduce process energy consumption and cost.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is：
This utility model provides a kind of reduction reaction of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group
System is it is characterised in that include：Dispensing mixing device, shaped device, drying device, new rotary hearth furnace, slag sluicing system device and
Fume dust remover, wherein：
Described dispensing mixing device includes：Lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material go out
Mouthful, for lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain mixed material；
Described shaped device includes：Mixed material entrance and mixing pelletizing outlet, described mixed material entrance is mixed with described
Close material outlet to be connected, for described mixed material is carried out forming processes, obtain mixing pelletizing；
Described drying device includes：Mixing pelletizing entrance and the outlet of dry bulb group, described mixing pelletizing entrance is mixed with described
Pelletizing outlet is connected, and for described mixing pelletizing is dried process, obtains dry bulb group；
Described new rotary hearth furnace includes：Adjacent feed zone, preheating zone, low-temperature reduction area, high temperature reduction area and go out successively
Material area, wherein, described feed zone furnace wall is provided with dry bulb group entrance, and described dry bulb group entrance is exported with described dry bulb group and is connected,
Described preheating zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet, and described low-temperature reduction area furnace wall is provided with heating tube high temperature
Dedusting smoke inlet and high-temperature flue gas outlet, are provided with multiple heating inside the furnace wall in described preheating zone and described low-temperature reduction area
Pipe, for carrying out heating tube mode heating to described preheating zone and described low-temperature reduction area, inside described high temperature reduction area furnace wall
It is provided with multiple burners, for described high temperature reduction area is carried out with burner mode heating, described discharge zone furnace wall is provided with metallization
Pelletizing exports；Described rotary hearth furnace adopts zone heating mode, described preheating zone and described low-temperature reduction area to adopt heating tube mode
Heated, described high temperature reduction area is heated using burner mode；
Described slag sluicing system device includes：Metallized pellet entrance, ferro-nickel product outlet and tailings outlet, described metallization
Pelletizing entrance is connected with the outlet of described metallized pellet, for described metallized pellet is carried out slag sluicing system process, obtains nickel
Iron product and tailings；
Described fume dust remover includes：High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, described high-temperature flue gas entry
It is connected with the high-temperature flue gas outlet of described new rotary hearth furnace, for high-temperature flue gas are carried out dust removal process, obtain high-temperature dust removal cigarette
Gas, described high-temperature dust removal exhanst gas outlet is entered with the heating tube high-temperature dust removal flue gas in described preheating zone and described low-temperature reduction area respectively
Mouthful it is connected, heat the preheating zone of described new rotary hearth furnace and low for using described high-temperature dust removal flue gas as the thermal source of heating tube
The material of warm reducing zone.
Inventor finds, simple according to the system structure of this utility model embodiment, easy to operate, new turn in this system
The preheating zone of bottom stove adopts heating tube to heat, and for burner heating, neither affects whole reducing process, and can solve pre-
The problem of hot-zone fume amount big blocking burner is it is achieved that the low-temperature reduction of lateritic nickel ore is smelted.And, described new rotary hearth furnace will
Flue is located at low-temperature reduction area, the flue gas of the generation heat directly as preheating zone and low-temperature reduction area heating tube after dedusting
Source it is achieved that furnace interior produce fume afterheat can effectively be recycled, thus, this system achieves environmental protection,
Connect and reduce process energy consumption and cost.
According to embodiment of the present utility model, the horizontal cross-section of described new rotary hearth furnace is annular, described preheating zone
Annulus angle 30-90.
According to embodiment of the present utility model, the horizontal cross-section of described new rotary hearth furnace is annular, described low-temperature reduction
The annulus angle 100-150 in area.
According to embodiment of the present utility model, the horizontal cross-section of described new rotary hearth furnace is annular, described high temperature reduction
The annulus angle 100-200 in area.
The beneficial effects of the utility model are：
（1）The reduction reaction system of the fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group that this utility model provides
System and method, the preheating zone of new rotary hearth furnace adopts heating tube to heat, and for burner heating, neither affects whole reduction
Technique, can solve the problems, such as preheating zone fume amount big blocking burner again.
（2）The reduction reaction system of the fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group that this utility model provides
System and method, flue is located at low-temperature reduction area by described new rotary hearth furnace, and the flue gas of generation is after dedusting directly as preheating
The thermal source of area and low-temperature reduction area heating tube it is achieved that the fume afterheat that furnace interior produces can effectively be recycled, thus,
This system achieves environmental protection, indirectly reduces process energy consumption and cost.
（3）The reduction reaction system of the fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group that this utility model provides
Unite and method is it is achieved that the low-temperature reduction of lateritic nickel ore is smelted, reduction energy compared with conventional rotary hearth furnace process lateritic nickel ore technology
Consumption 10% ~ 20%.
Brief description
Fig. 1 is the reduction reaction system of this utility model fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group
Structure chart.
Fig. 2 is the reduction reaction system of this utility model fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group
Simple diagram.
Fig. 3 is the reduction reaction system of this utility model fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group
Workflow diagram.
Wherein, 10, heating tube, 20, burner, 30, flue, 100, dispensing mixing device, 101, lateritic nickel ore entrance, 102,
Reduction coal entrance, 103, additive entrance, 104, mixed material outlet, 200, shaped device, 201, mixed material entrance, 202,
Mixing pelletizing outlet, 300, drying device, 301, mixing pelletizing entrance, 302, the outlet of dry bulb group, 400, new rotary hearth furnace, 401,
Dry bulb group's entrance, 402, heating tube high-temperature dust removal smoke inlet, 403, metallized pellet outlet, 404, high-temperature flue gas outlet,
500th, slag sluicing system device, 501, metallized pellet entrance, 502, ferro-nickel product outlet, 503, tailings outlet, 600, flue gas removes
Dirt device, 601, high-temperature flue gas entry, 602, high-temperature dust removal exhanst gas outlet.
Specific embodiment
In order that those skilled in the art more fully understand the technical solution of the utility model, with reference to specific embodiment
The utility model is described in further detail.The embodiments described below is exemplary, is only used for explaining that this practicality is new
Type, and it is not intended that to restriction of the present utility model.Unreceipted particular technique or condition in embodiment, according in the art
The technology described by document or condition or carry out according to product description.
According to one side of the present utility model, a kind of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group
Reduction reaction system, its structure is as shown in figure 1, include：Dispensing mixing device 100, shaped device 200, drying device 300, new
Type rotary hearth furnace 400, slag sluicing system device 500 and fume dust remover 600.Fig. 2 is this utility model fume afterheat furnace interior
The simple diagram of the reduction reaction system of recycling type lateritic nickel ore dry bulb group, as illustrated, described dispensing mixing device includes：Red
Native nickel minerals entrance 101, reduction coal enter 102, additive entrance 103 and mixed material outlet 104, for by lateritic nickel ore, reduction
Coal and additive carry out dispensing mixing treatment, obtain mixed material；Described shaped device includes：Mixed material entrance 201 and mixed
Close pelletizing outlet 202, described mixed material entrance is connected with the outlet of described mixed material, for being become described mixed material
Type is processed, and obtains mixing pelletizing；Described drying device includes：Mixing pelletizing entrance 301 and the outlet 302 of dry bulb group, described mixing
Pelletizing entrance is connected with described mixing pelletizing outlet, for described mixing pelletizing is dried process, obtains dry bulb group；Described
New rotary hearth furnace includes：Adjacent feed zone, preheating zone, low-temperature reduction area, high temperature reduction area and discharge zone successively, wherein, institute
Stating rotary hearth furnace adopts zone heating mode, described preheating zone and described low-temperature reduction area to be heated using heating tube mode, institute
State high temperature reduction area to be heated using burner mode；Described slag sluicing system device includes：Metallized pellet entrance 501, ferronickel
Products export 502 and tailings outlet 503, described metallized pellet entrance is connected with the outlet of described metallized pellet；Described flue gas
Dust arrester includes：High-temperature flue gas entry 601 and high-temperature dust removal exhanst gas outlet 602, described high-temperature flue gas entry is new with described
The high-temperature flue gas outlet of rotary hearth furnace is connected, described high-temperature dust removal exhanst gas outlet respectively with described preheating zone and described low-temperature reduction area
Heating tube high-temperature dust removal smoke inlet be connected.
Inventor finds, simple according to the system structure of this utility model embodiment, easy to operate, new turn in this system
The preheating zone of bottom stove adopts heating tube to heat, and for burner heating, neither affects whole reducing process, and can solve pre-
The problem of hot-zone fume amount big blocking burner is it is achieved that the low-temperature reduction of lateritic nickel ore is smelted.And, described new rotary hearth furnace will
Flue is located at low-temperature reduction area, the flue gas of the generation heat directly as preheating zone and low-temperature reduction area heating tube after dedusting
Source it is achieved that furnace interior produce fume afterheat can effectively be recycled, thus, this system achieves environmental protection,
Connect and reduce process energy consumption and cost.
According to specific embodiment of the utility model, described new rotary hearth furnace includes：Adjacent feed zone, preheating successively
Area, low-temperature reduction area, high temperature reduction area and discharge zone.In some embodiments of the present utility model, on described feed zone furnace wall
It is provided with dry bulb group entrance 401, described dry bulb group entrance is exported with described dry bulb group and is connected, and described dry bulb group entrance is used for dry bulb
Group adds in described new rotary hearth furnace is reacted；Described preheating zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet
402, heated for delivering into heating tube high-temperature dust removal flue gas in the heating tube of described rotary hearth furnace；Described low-temperature reduction
Area furnace wall is provided with heating tube high-temperature dust removal smoke inlet 402 and high-temperature flue gas outlet 404, described heating tube high-temperature dust removal flue gas
Entrance is used for being heated in the heating tube deliver into heating tube high-temperature dust removal flue gas described new rotary hearth furnace, described high temperature
The high-temperature flue gas that exhanst gas outlet is used for producing the low-temperature reduction area of described new rotary hearth furnace are discharged；Described discharge zone sets on furnace wall
There is metallized pellet outlet 403, for discharging metallized pellet.
According to specific embodiment of the utility model, the concrete shape of described new rotary hearth furnace is not particularly limited, as long as
It is capable of carrying out reduction reaction to lateritic nickel ore dry bulb group.In some embodiments of the present utility model, described new
The horizontal cross-section of rotary hearth furnace is annular, and, the annulus angle shared by each area is not particularly limited.Preferably, described pre-
The annulus angle 30-90 of hot-zone, the annulus angle 100-150 in described low-temperature reduction area, the annulus in described high temperature reduction area
Angle 100-200 is it is ensured that good reduction effect.
According to specific embodiment of the utility model, the preheating zone of described new rotary hearth furnace and the heating side in low-temperature reduction area
Formula is not particularly limited, as long as raw material can be heated.In some embodiments of the present utility model, described preheating zone and
Described low-temperature reduction area is heated by the way of heating tube, and further, described heating tube 10 may be mounted at described pre-
Inside the furnace wall in hot-zone and described low-temperature reduction area, multiple heating tubes 10 can be set.In some embodiments of the present utility model
In, described heating tube includes body and internal heat resource, first heats body to hot mode for internal heat resource, and body is again by heat transfer
To in stove, and this process is not to furnace atmosphere disturbance.The preheating zone of described new rotary hearth furnace adopts heating tube to heat, with respect to
For burner heating, neither affect whole reducing process, preheating zone fume amount big blocking burner can be solved the problems, such as again.Thus,
Achieve the raw material to described preheating zone and described low-temperature reduction area to heat.
According to specific embodiment of the utility model, the mode of heating in the high temperature reduction area of described new rotary hearth furnace is not had
The restriction of body, as long as raw material can be heated.In some embodiments of the present utility model, described high temperature reduction area is using burning
The mode of mouth is heated, and further, described burner 20 may be mounted inside the furnace wall in described high temperature reduction area, Ke Yishe
Put multiple burners 20.In some embodiments of the present utility model, radiant heat transfer is passed through using the heat that burner combustion produces
Mode is passing to pelletizing.Because the burning of burner naked light has the advantage that burning capacity is big, heating-up temperature is high（Up to 1500
℃）, thus it is achieved that heating to the raw material in described high temperature reduction area.
According to specific embodiment of the utility model, this system also includes described fume dust remover, for high temperature cigarette
Gas carries out dust removal process, obtains high-temperature dust removal flue gas.In some embodiments of the present utility model, described fume dust remover bag
Include：The high-temperature flue gas of high-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, described high-temperature flue gas entry and described new rotary hearth furnace
Outlet is connected, and for high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal flue gas, described high-temperature dust removal exhanst gas outlet is respectively
It is connected with the heating tube high-temperature dust removal smoke inlet in described preheating zone and described low-temperature reduction area, for by described high-temperature dust removal cigarette
Gas, as the thermal source of heating tube, heats the preheating zone of described new rotary hearth furnace and the material in low-temperature reduction area.Thus, described new
Flue 30 is located at low-temperature reduction area by rotary hearth furnace, and the flue gas of generation adds directly as preheating zone and low-temperature reduction area after dedusting
The thermal source of heat pipe it is achieved that the fume afterheat that furnace interior produces can effectively be recycled, thus, this system achieves green
Environmental protection, reduces process energy consumption and cost indirectly.
According to specific embodiment of the utility model, this system also includes described slag sluicing system device, for by described gold
Belong to pellet and carry out slag sluicing system process, obtain ferro-nickel product and tailings.In some embodiments of the present utility model, described slag
Ferrum segregation apparatuss include：Metallized pellet entrance, ferro-nickel product outlet and tailings outlet, described metallized pellet entrance with described
Metallized pellet outlet is connected, and for described metallized pellet is carried out slag sluicing system process, obtains ferro-nickel product and tailings.By
This, this system achieves the efficient recovery to lateritic nickel ore, has obtained ferro-nickel product.
According to embodiment of the present utility model, the granularity of lateritic nickel ore, reduction coal and additive in described system and weight
Amount proportioning is not particularly limited.In some embodiments of the present utility model, lateritic nickel ore in described system, reduction coal and
The granularity of additive is below 100 mesh；The weight proportion of lateritic nickel ore, reduction coal and additive is lateritic nickel ore：Reduction coal：Add
Plus agent=100：5-25：3-15.Because, when the weight proportion of raw material lateritic nickel ore, reduction coal and additive is located above range
Interior, cinder viscosity can be made low, thus, be conducive to the gathering of ferronickel granule and grow up.
According to embodiment of the present utility model, the species of the additive in described system is not particularly limited, as long as energy
It is enough in and carry out reacting.In some embodiments of the present utility model, described additive is alkali metal oxide, alkali metal
At least one in salt, alkaline earth oxide and alkali salt.
In other side of the present utility model, this utility model provide one kind carried out using foregoing system red
The method of the reduction reaction of native nickel minerals, as shown in 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 is processed, so that
To mixed material.
According to embodiment of the present utility model, described system includes dispensing mixing device, for by lateritic nickel ore, reduction coal
Carry out batch mixing with additive and dispensing is processed, obtain mixed material.In some embodiments of the present utility model, in described system
Lateritic nickel ore, reduction coal and additive granularity below 100 mesh；The weight proportion of lateritic nickel ore, reduction coal and additive
For lateritic nickel ore：Reduction coal：Additive=100：5-25：3-15.Because, when the weight of raw material lateritic nickel ore, reduction coal and additive
Amount proportioning is located in above range, and cinder viscosity can be made low, thus, be conducive to the gathering of ferronickel granule and grow up.According to this reality
With new embodiment, the species of the additive in described system is not particularly limited, as long as can be used in carrying out reaction is
Can.In some embodiments of the present utility model, described additive is alkali metal oxide, alkali metal salt, alkaline-earth metal oxide
At least one in thing and alkali salt.
（2）Mixed material addition shaped device is carried out forming processes, to obtain mixing pelletizing.
（3）Mixing pelletizing is added drying device to be dried process, to obtain dry bulb group.
（4）Dry bulb group is added to new rotary hearth furnace and carries out reduction melting process, to obtain metallized pellet.
According to specific embodiment of the utility model, described new rotary hearth furnace includes：Adjacent feed zone, preheating successively
Area, low-temperature reduction area, high temperature reduction area and discharge zone, wherein, set inside the furnace wall in described preheating zone and described low-temperature reduction area
There are multiple heating tubes, for heating tube mode heating, described high temperature reduction are carried out to described preheating zone and described low-temperature reduction area
It is provided with multiple burners, for burner mode heating is carried out to described high temperature reduction area inside area furnace wall.Described new rotary hearth furnace is adopted
Zone heating mode, described preheating zone and described low-temperature reduction area is used to be heated using heating tube mode, described high temperature reduction
Area is heated using burner mode.Described dry bulb group in the course of reaction of described new rotary hearth furnace is：Enter stove dry bulb group pre-
Hot-zone first carries out pre-heating temperature elevation to 700 DEG C -900 DEG C, time of staying 5-15min, the water of crystallization in removing lateritic nickel ore；Then,
It is warmed up to 1000 DEG C -1150 DEG C in low-temperature reduction area, time of staying 10-20min, the pelletizing after removing water of crystallization is carried out low
Temperature reduction, the percent reduction of nickel to more than 90%, the percent reduction of ferrum to more than 50%；Finally, carry out drastic reduction in high temperature reduction area
Grow up with ferronickel crystal grain, high temperature reduction area temperature 1200-1400 DEG C, time of staying 10-20min, described high temperature reduction area adds
Hot mode heats for burner, and lateritic nickel ore pelletizing finally gives after drastic reduction and ferronickel crystal grain are grown up in high temperature reduction area
Metallized pellet discharges rotary hearth furnace in discharge zone.In this system, the preheating zone of new rotary hearth furnace adopts heating tube to heat, with respect to
Burner heating for, neither affect whole reducing process, can solve the problems, such as again preheating zone fume amount big blocking burner it is achieved that
The low-temperature reduction of lateritic nickel ore is smelted.
Described fume dust remover, for high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal flue gas, described high temperature
Dedusting exhanst gas outlet is connected with the heating tube high-temperature dust removal smoke inlet in described preheating zone and described low-temperature reduction area respectively, is used for
Using described high-temperature dust removal flue gas as the thermal source of heating tube, heat the preheating zone of described new rotary hearth furnace and the thing in low-temperature reduction area
Material.Thus, flue is located at low-temperature reduction area by described new rotary hearth furnace, and the flue gas of generation is after dedusting directly as preheating zone
With the thermal source of low-temperature reduction area heating tube it is achieved that the fume afterheat that furnace interior produces can effectively be recycled, thus, should
System achieves environmental protection, indirectly reduces process energy consumption and cost.
（5）Metallized pellet addition slag sluicing system device is carried out slag sluicing system process, to obtain ferro-nickel product and tail
Slag.According to embodiment of the present utility model, described slag sluicing system device, for carrying out described metallized pellet at slag sluicing system
Reason, obtains ferro-nickel product and tailings.Thus, this system achieves the effective process to lateritic nickel ore, has obtained ferro-nickel product.
Inventor finds, simple according to the system structure of this utility model embodiment, easy to operate, new turn in this system
The preheating zone of bottom stove adopts heating tube to heat, and for burner heating, neither affects whole reducing process, and can solve pre-
The problem of hot-zone fume amount big blocking burner is it is achieved that the low-temperature reduction of lateritic nickel ore is smelted.And, described new rotary hearth furnace will
Flue is located at low-temperature reduction area, the flue gas of the generation heat directly as preheating zone and low-temperature reduction area heating tube after dedusting
Source it is achieved that furnace interior produce fume afterheat can effectively be recycled, thus, this system achieves environmental protection,
Connect and reduce process energy consumption and cost.
Embodiment 1
By lateritic nickel ore（Containing Ni 1.85%）, reduction coal and sodium carbonate in mass ratio 100:5:5 in blend ingredients device
Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains mixing pelletizing, so
Afterwards mixing pelletizing is dried process in drying device and obtains dry bulb group（Aqueous 1.0%）, dry bulb is rolled into a ball in new rotary hearth furnace
In carry out reduction melting process, the annulus angle 30 of preheating zone, 700 DEG C of preheating zone temperature, time of staying 10min；Low-temperature reduction
The annulus angle 100 in area, 1000 DEG C of low-temperature reduction area temperature, time of staying 15min；The annulus angle 200 in high temperature reduction area,
1350 DEG C of high temperature reduction area temperature, time of staying 20min.The origin of heat high temperature of the heating tube in preheating zone and low-temperature reduction area is also
The high-temperature dust removal flue gas in former area, smelts the metallized pellet obtaining degree of metalization 55% after terminating, metallized pellet is sent into slag
Carry out slag sluicing system process in ferrum segregation apparatuss and obtain ferronickel powder（Containing Ni 5.62%, TFe 64.73%）And tailings, whole flow process
Nickel recovery 95%.
Embodiment 2
By the lateritic nickel ore less than 100 mesh（Containing Ni 2.45%）, reduction coal and limestone in mass ratio 100:10:15 mixed
Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains in material proportioner
To mixing pelletizing, then mixing pelletizing is dried process in drying device and obtains dry bulb group（Aqueous 1.5%）, by dry bulb
Group carries out reduction melting process, the annulus angle 50 of preheating zone, 800 DEG C of preheating zone temperature, the time of staying in new rotary hearth furnace
5min；The annulus angle 150 in low-temperature reduction area, 1100 DEG C of low-temperature reduction area temperature, time of staying 10min；High temperature reduction area
Annulus angle 150,1300 DEG C of high temperature reduction area temperature, time of staying 15min.The heating tube in preheating zone and low-temperature reduction area
The high-temperature dust removal flue gas in origin of heat high temperature reduction area, smelts the metallized pellet obtaining degree of metalization 60% after terminating, metal
Carry out slag sluicing system process in pellet feeding slag sluicing system device and obtain ferronickel powder（Containing Ni 6.82%, TFe 65.64%）And tail
Slag, whole flow process nickel recovery 96%.
Embodiment 3
By lateritic nickel ore（Containing Ni 1.12%）, reduction coal and Calx in mass ratio 100:25:9 enter in blend ingredients device
Row dispensing, mixing treatment obtain mixed material, and mixed material carries out forming processes in shaped device and obtains mixing pelletizing, then
Mixing pelletizing is dried process in drying device and obtains dry bulb group（Aqueous 0.5%）, dry bulb is rolled into a ball in new rotary hearth furnace
Carry out reduction melting process, the annulus angle 70 of preheating zone, 750 DEG C of preheating zone temperature, time of staying 10min；Low-temperature reduction area
Annulus angle 120,1150 DEG C of low-temperature reduction area temperature, time of staying 20min；The annulus angle 160 in high temperature reduction area is high
1350 DEG C of warm reducing zone temperature, time of staying 20min.The origin of heat high temperature reduction of the heating tube in preheating zone and low-temperature reduction area
The high-temperature dust removal flue gas in area, smelts the metallized pellet obtaining degree of metalization 64% after terminating, and metallized pellet is sent into slag iron and divided
Carry out slag sluicing system process and obtain ferronickel powder in device（Containing Ni 3.83%, TFe 75.83%）And tailings, whole flow process nickel returns
Yield 97%.
Embodiment 4
By the lateritic nickel ore less than 100 mesh（Containing Ni 1.85%）, reduction coal and sodium carbonate in mass ratio 100:5:5 in batch mixing
Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains in proportioner
Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing（Aqueous 1.0%）, by dry bulb group
Carry out reduction melting process, the annulus angle 40 of preheating zone, 850 DEG C of preheating zone temperature, the time of staying in new rotary hearth furnace
10min；The annulus angle 120 in low-temperature reduction area, 1050 DEG C of low-temperature reduction area temperature, time of staying 15min；High temperature reduction area
Annulus angle 180,1250 DEG C of high temperature reduction area temperature, time of staying 20min.Preheating zone and the heating tube in low-temperature reduction area
Origin of heat high temperature reduction area high-temperature dust removal flue gas, smelt terminate after the metallized pellet obtaining degree of metalization 55%, will
Carry out fusing separating treatment at 1450 DEG C in metallized pellet feeding electric furnace and obtain dilval（Containing Ni 18.62%, TFe
79.73%）With ferronickel slag, whole flow process nickel recovery 96%.
Embodiment 5
By the lateritic nickel ore less than 100 mesh（Containing Ni 2.45%）, reduction coal and limestone in mass ratio 100:20:15 mixed
Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains in material proportioner
To mixing pelletizing, then mixing pelletizing is dried process in drying device and obtains dry bulb group（Aqueous 1.5%）, by dry bulb
Group carries out reduction melting process, the annulus angle 60 of preheating zone, 900 DEG C of preheating zone temperature, the time of staying in new rotary hearth furnace
5min；The annulus angle 130 in low-temperature reduction area, 1150 DEG C of low-temperature reduction area temperature, time of staying 20min；High temperature reduction area
Annulus angle 150,1400 DEG C of high temperature reduction area temperature, time of staying 10min.The heating tube in preheating zone and low-temperature reduction area
The high-temperature dust removal flue gas in origin of heat high temperature reduction area, smelts the metallized pellet obtaining degree of metalization 60% after terminating, by gold
Carry out fusing separating treatment in genus pellet feeding electric furnace and obtain dilval（Containing Ni 24.82%, TFe 73.24%）And ferronickel
Slag, whole flow process nickel recovery 97%.
Embodiment 6
By lateritic nickel ore（Containing Ni 1.12%）, reduction coal and Calx in mass ratio 100:25:9 enter in blend ingredients device
Row dispensing, mixing treatment obtain mixed material, and mixed material carries out forming processes in shaped device and obtains mixing pelletizing, then
Mixing pelletizing is dried process in drying device and obtains dry bulb group（Aqueous 0.5%）, dry bulb is rolled into a ball in new rotary hearth furnace
Carry out reduction melting process, the annulus angle 80 of preheating zone, 900 DEG C of preheating zone temperature, time of staying 10min；Low-temperature reduction area
Annulus angle 150,1150 DEG C of low-temperature reduction area temperature, time of staying 20min；The annulus angle 140 in high temperature reduction area is high
1300 DEG C of warm reducing zone temperature, time of staying 15min.The origin of heat high temperature reduction of the heating tube in preheating zone and low-temperature reduction area
The high-temperature dust removal flue gas in area, smelts the metallized pellet obtaining degree of metalization 64% after terminating, metallized pellet is sent into electric furnace
In carry out melt separating treatment obtain dilval（Containing Ni 15.35%, TFe 82.83%）With ferronickel slag, the recovery of whole flow process nickel
Rate 98%.
It is to be understood that term " first ", " second " are only used for describing purpose in description of the present utility model, and
It is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define
The feature of " first ", " second " can be expressed or implicitly include one or more this feature.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning in this utility model for the above-mentioned term.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State that be not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combine in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area
Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered
Row combines and combines.
Although of the present utility model embodiment has been shown and described above it is to be understood that above-described embodiment is
Exemplary it is impossible to be interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model
Interior above-described embodiment can be changed, change, replacing and modification, simultaneously for one of ordinary skill in the art, foundation
The thought of the application, all will change in specific embodiments and applications.
Claims (4)
1. a kind of reduction reaction system of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group is it is characterised in that wrap
Include：Dispensing mixing device, shaped device, drying device, new rotary hearth furnace, slag sluicing system device and fume dust remover, wherein：
Described dispensing mixing device includes：Lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material outlet, use
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 carried out forming processes, 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；
Described new rotary hearth furnace includes：Adjacent feed zone, preheating zone, low-temperature reduction area, high temperature reduction area and discharge zone successively,
Wherein, described feed zone furnace wall is provided with dry bulb group entrance, and described dry bulb group entrance is exported with described dry bulb group and is connected, described pre-
Hot-zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet, and described low-temperature reduction area furnace wall is provided with heating tube high-temperature dust removal cigarette
Gas entrance and high-temperature flue gas outlet, are provided with multiple heating tubes inside the furnace wall in described preheating zone and described low-temperature reduction area, are used for
Described preheating zone and described low-temperature reduction area are carried out with heating tube mode heating, is provided with multiple inside described high temperature reduction area furnace wall
Burner, for described high temperature reduction area is carried out with burner mode heating, described discharge zone furnace wall is provided with metallized pellet outlet；
Described rotary hearth furnace adopts zone heating mode, described preheating zone and described low-temperature reduction area to be heated using heating tube mode,
Described high temperature reduction area is heated using burner mode；
Described slag sluicing system device includes：Metallized pellet entrance, ferro-nickel product outlet 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；
Described fume dust remover includes：High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, described high-temperature flue gas entry and institute
The high-temperature flue gas outlet stating new rotary hearth furnace is connected, and for high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal flue gas, institute
State the heating tube high-temperature dust removal smoke inlet phase respectively with described preheating zone and described low-temperature reduction area for the high-temperature dust removal exhanst gas outlet
Even, the preheating zone of described new rotary hearth furnace and low temperature are heated also for using described high-temperature dust removal flue gas as the thermal source of heating tube
The material in former area.
2. system according to claim 1 it is characterised in that described new rotary hearth furnace horizontal cross-section be annular, institute
State the annulus angle 30-90 of preheating zone.
3. system according to claim 1 it is characterised in that described new rotary hearth furnace horizontal cross-section be annular, institute
State the annulus angle 100-150 in low-temperature reduction area.
4. system according to claim 1 it is characterised in that described new rotary hearth furnace horizontal cross-section be annular, institute
State the annulus angle 100-200 in high temperature reduction area.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282468A (en) * | 2016-09-13 | 2017-01-04 | 江苏省冶金设计院有限公司 | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282468A (en) * | 2016-09-13 | 2017-01-04 | 江苏省冶金设计院有限公司 | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group |
| CN106282468B (en) * | 2016-09-13 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group |
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