CN206069954U - A kind of wet piece of lateritic nickel ore processing system of fume afterheat recycling type - Google Patents
A kind of wet piece of lateritic nickel ore processing system of fume afterheat recycling type Download PDFInfo
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- CN206069954U CN206069954U CN201621051734.3U CN201621051734U CN206069954U CN 206069954 U CN206069954 U CN 206069954U CN 201621051734 U CN201621051734 U CN 201621051734U CN 206069954 U CN206069954 U CN 206069954U
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Abstract
This utility model belongs to field of metallurgy, and in particular to a kind of wet piece of lateritic nickel ore processing system of fume afterheat recycling type.The system includes：Material processing device, preheating and reduction apparatus, dust arrester and segregation apparatuss, wherein：The material processing device, including the breaker, screening plant and mixing arrangement that are sequentially connected；The preheating and reduction apparatus include：Adjacent feed zone, drying tube preheating zone, burner on sidewall reducing zone and discharge zone successively；The dust arrester includes：Smoke inlet, dedusting exhanst gas outlet and dust outlet；The segregation apparatuss include：Reducing material entrance, ferro-nickel product outlet and tailings outlet.The system is passed through in drying tube as drying tube preheating zone heat source after being processed by the use of preheating and reduction apparatus high-temperature flue gas removing dust device, and fume afterheat is recycled, low with energy consumption, efficiency high and the advantages of have wide range of applications.
Description
Technical field
This utility model belongs to field of metallurgy, and in particular to a kind of wet piece of lateritic nickel ore processing system of fume afterheat recycling type
System.
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 increasingly subject to pay attention to.Lateritic nickel ore
Two classes are essentially divided into, a class is limonite type, positioned at the top in mineral deposit, due to the result of weathering eluviation, ferrum is more, silicon
Few, magnesium is few, and nickel is relatively low, but amount containing cobalt is higher, and this Ore preferably adopts hydrometallurgical processes to process, the slag that smelting ferronickel is produced
For the production of steel；Another kind of is garnierite, positioned at the bottom in mineral deposit, as air slaking are enriched with, many silicon of nickel minerals, many magnesium, low ferrum,
Cobalt, nickel content are higher, referred to as garnirite, and this Ore preferably adopts fire metallurgy process to process, and production ferronickel is produced
Slag can be used for construction material and production chemical fertilizer.Ore in intermediate layer can adopt pyrometallurgy, it is also possible to adopt
Use hydrometallurgical processes；Have the following disadvantages in process using traditional pyrometallurgical smelting ferronickel：Process environments pollute
Seriously, high energy consumption, runs counter to the restriction of national environmental protection policy and energy policy；It is required that ore has higher nickel grade；Revolution
Kiln reduction temperature is low, easy ring formation；Production finished product nickel grade is low；Low yield.In recent years, some experts and scholar propose " to use in the industry
The new method of coal base rotary hearth furnace process lateritic nickel ore ", reduction process are completed in main equipment rotary hearth furnace, work more ripe at present
Skill is distributed into rotary hearth furnace after mostly being the pretreatment such as batch mixing, ball processed, drying again, and before rotary hearth furnace reduction, pretreatment process is more complicated, has
The technological process of production is long, and equipment investment is big, and production cost is high, the defect such as energy consumption height, additionally, burner formula is adopted existing rotary hearth furnace more
Mode of heating, but as material enters in stove initial stage stove, Dust Capacity is larger, is easily caused burner blocking so as to affect to produce direct motion.Therefore
A kind of how to design that technological process is short, equipment investment is low, have wide range of applications low with energy consumption process lateritic nickel ore is
System becomes the technical problem of this area urgent need to resolve.
Utility model content
This utility model is directed to the deficiencies in the prior art, it is proposed that at a kind of wet piece of lateritic nickel ore of fume afterheat recycling type
Reason system.The system is passed through in drying tube as drying tube after being processed by the use of preheating and reduction apparatus high-temperature flue gas removing dust device
Preheating zone heat source, fume afterheat are recycled, low with energy consumption, efficiency high and the advantages of have wide range of applications.
To solve above-mentioned technical problem, the technical solution adopted in the utility model is：
The utility model proposes a kind of wet piece of lateritic nickel ore processing system of fume afterheat recycling type.It is new according to this practicality
The embodiment of type, the system include：Material processing device, preheating and reduction apparatus, dust arrester and segregation apparatuss, wherein：Institute
Material processing device is stated, including the breaker, screening plant and mixing arrangement that are sequentially connected, the material processing device has
Lateritic nickel ore entrance, reduction coal entrance, additive entrance and aqueous mixture material outlet, for by the lateritic nickel ore, reduction
Agent and additive are mixed in proportion Jing after processing, and obtain aqueous mixture material；After the preheating and reduction apparatus are for transformation
Rotary hearth furnace, including：Adjacent feed zone, drying tube preheating zone, burner on sidewall reducing zone and discharge zone successively, wherein, it is described
Be provided with partition wall between drying tube preheating zone and the burner on sidewall reducing zone, the burner on sidewall reducing zone and the discharge zone it
Between be provided with barricade, the partition wall and barricade are extended downwardly by the roof of the rotary hearth furnace, and the cloth ring with the rotary hearth furnace
Shape furnace bottom keeps certain intervals；Wherein, multiple drying tubes are provided with the inside of the furnace wall of the drying tube preheating zone, for the drying
Heated pipe preheating zone；The burner on sidewall reducing zone is provided with multiple burners on the inside of furnace wall, for the burner on sidewall also
Former area carries out burner mode heating；The feed zone is provided with aqueous mixture material entrance, and the drying tube preheating zone is set on furnace wall
Have drying tube thermal source inlet and an exhanst gas outlet, the discharge zone is provided with reducing material outlet, the aqueous mixture material entrance with
The material processing device aqueous mixture material outlet be connected, for by the aqueous mixture material in the preheating and reduction
It is dried in device, preheats and reduction treatment, obtains reducing material；The dust arrester includes：Smoke inlet, dedusting flue gas
Outlet and dust outlet, the smoke inlet are connected with the exhanst gas outlet of the preheating and reduction apparatus, and the dedusting flue gas goes out
Mouth is connected with the drying tube thermal source inlet of the preheating and reduction apparatus；The segregation apparatuss include：Reducing material entrance, ferronickel
Products export and tailings outlet, the reducing material entrance are connected with the reducing material outlet of the preheating and reduction apparatus, are used
Ferro-nickel product and tailings are finally given after the reducing material is carried out slag sluicing system.
Inventor is had found, according to the system of this utility model embodiment, is burnt using furnace wall side wall with conventional rotary hearth furnace
The mode of mouth heating is compared, and sets up drying tube preheating zone, solve material and enter the stove initial stage because of powder in rotary hearth furnace of the present utility model
The problem that dust quantity is big and causes burner to block；And this utility model can adopt wet block directly enter rotary hearth furnace flow processing it is red
Native nickel minerals, shortens technological process, reduces equipment investment, production cost and energy consumption；Simultaneously the system using preheating and
It is passed through in drying tube as drying tube preheating zone heat source, fume afterheat after the process of reduction apparatus high-temperature flue gas removing dust device
Recycle, improve equipment thermal efficiency, reduce energy consumption；Additionally, this utility model rotary hearth furnace can adopt regenerative combustion technology,
Fuel cost can be reduced using inferior or low-rank fuel, at home and natural gas can be lacked and the area of high-grade fuel pushes away
Extensively.
According to the horizontal cross-section of embodiment of the present utility model, the preheating and reduction apparatus be annular, the drying
Pipe preheating zone annulus angle is 30 ° -100 °.
According to the height that embodiment of the present utility model, the drying tube preheating zone are produced using the preheating and reduction apparatus
After warm flue gas removing dust device is processed, it is passed through in drying tube as drying tube preheating zone heat source.
This utility model at least has the advantages that：
1., compared with conventional rotary hearth furnace is by the way of the heating of furnace wall burner on sidewall, increase in rotary hearth furnace of the present utility model
If drying tube preheating zone, solve the problems, such as that material enters the stove initial stage because Dust Capacity causes greatly burner to block.
2. this utility model can adopt wet block directly to enter the flow processing lateritic nickel ore of rotary hearth furnace, shorten technique stream
Journey, reduces equipment investment, production cost and energy consumption.
3. the system is passed through in drying tube as drying by the use of after the process of preheating/reduction apparatus high-temperature flue gas removing dust device
Pipe preheating zone heat source, fume afterheat are recycled, and improve equipment thermal efficiency, reduce energy consumption.
4. this utility model rotary hearth furnace can adopt regenerative combustion technology, can be reduced using inferior or low-rank fuel
Fuel cost, can be promoted with the area for lacking natural gas and high-grade fuel at home.
Description of the drawings
Fig. 1 is the schematic diagram that this utility model transforms rotary hearth furnace.
Fig. 2 is the system schematic that this utility model processes lateritic nickel ore.
Fig. 3 is the schematic flow sheet that this utility model processes lateritic nickel ore.
Wherein, feed zone 1, drying tube preheating zone 2, burner on sidewall reducing zone 3, discharge zone 4, flue 5, preheating zone and reduction
Interval partition wall 6, discharge end barricade 7, drying tube 8, burner 9, material processing device S100, lateritic nickel ore entrance 101, reduction coal enters
Mouth 102, additive entrance 103, aqueous mixture material outlet 104, preheating and reduction apparatus S200, aqueous mixture material entrance
201, drying tube thermal source inlet 202, reducing material outlet 203, exhanst gas outlet 204, dust arrester S300, smoke inlet 301 are removed
Dirt exhanst gas outlet 302, dust outlet 303, segregation apparatuss S400, reducing material entrance 401, ferro-nickel product outlet 402, tailings goes out
Mouth 403.
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.
The utility model proposes a kind of wet piece of lateritic nickel ore processing system of fume afterheat recycling type.It is new according to this practicality
The embodiment of type, Fig. 1 transform the schematic diagram of rotary hearth furnace for this utility model, and Fig. 2 for what this utility model processed lateritic nickel ore is
System schematic diagram, sees figures.1.and.2 shown, and the system includes：Material processing device S100, preheating and reduction apparatus S200, dedusting
Device S300 and segregation apparatuss S400, wherein：The material processing device has lateritic nickel ore entrance 101, reduction coal entrance
102nd, additive entrance 103 and aqueous mixture material outlet 104, for by the lateritic nickel ore, reducing agent and additive Jing
Mixed after reason in proportion, obtained aqueous mixture material；The preheating and reduction apparatus include：Adjacent successively feed zone 1,
Drying tube preheating zone 2, burner on sidewall reducing zone 3 and discharge zone 4, wherein, the feed zone is provided with aqueous mixture material entrance
201, drying tube preheating zone furnace wall is provided with drying tube thermal source inlet 202 and exhanst gas outlet 204, and the discharge zone is provided with also
Raw material outlet 203, the aqueous mixture material entrance are connected with the aqueous mixture material outlet of the material processing device, are used
In the aqueous mixture material to be dried in the preheating and reduction apparatus, preheat and reduction treatment, reduzate is obtained
Material；The reducing material obtains ferro-nickel product and tailings after dust arrester and segregation apparatuss are processed described in.
Inventor is had found, according to the system of this utility model embodiment, is burnt using furnace wall side wall with conventional rotary hearth furnace
The mode of mouth heating is compared, and sets up drying tube preheating zone, solve material and enter the stove initial stage because of powder in rotary hearth furnace of the present utility model
The problem that dust quantity is big and causes burner to block；And this utility model can adopt wet block directly enter rotary hearth furnace flow processing it is red
Native nickel minerals, shortens technological process, reduces equipment investment, production cost and energy consumption；Simultaneously the system using preheating and
It is passed through in drying tube as drying tube preheating zone heat source, fume afterheat after the process of reduction apparatus high-temperature flue gas removing dust device
Recycle, improve equipment thermal efficiency, reduce energy consumption；Additionally, this utility model rotary hearth furnace can adopt regenerative combustion technology,
Fuel cost can be reduced using inferior or low-rank fuel, at home and natural gas can be lacked and the area of high-grade fuel pushes away
Extensively.
According to embodiment of the present utility model, the material processing device, including the breaker, screening dress that are sequentially connected
Put and mixing arrangement.
According to embodiment of the present utility model, the concrete species of the breaker is unrestricted, if can reach by
The effect of the broken powdering of lump material, can be metal breaker, stone breaker, hogging device or modeling
Material breaker, according to some embodiments of the present utility model, this utility model is preferably metal breaker or stone is broken
Device.
According to embodiment of the present utility model, the concrete species of the screening plant and method are unrestricted, as long as can
Play a part of granule size different mixed materials is divided into various granularity level with compass screen surface with holes, can be turn
Sieve or shaking screen, independent screening, auxiliary screening or dehydration screening, according to some embodiments of the present utility model, this utility model
Preferably revolving screen or auxiliary screening.
According to embodiment of the present utility model, the preheating and reduction apparatus are improved rotary hearth furnace, wherein, rotary hearth furnace
Concrete model it is unrestricted, can be heat accumulating type or non-regenerative rotary hearth furnace.The level of the preheating and reduction apparatus is cut
The concrete shape in face is unrestricted, and according to some embodiments of the present utility model, this utility model is preferably annular, more preferably
, the drying tube preheating zone annulus angle is 30 ° -100 °, and this utility model rotary hearth furnace drying tube preheating zone annulus angle is not
30 ° are should be less than, if annulus angle is less than 30 °, material is too short in preheating zone remaining time, can cause lateritic nickel ore moisture removal
Not exclusively, residual moisture affects material area reproducibility in reducing zone removing, reduces the percent reduction of valuable metal, but when rotary hearth furnace is pre-
Hot-zone annulus angle crosses senior general affects the reduction effect of reducing zone material, so control preheating zone annulus angle is not more than 100 °.
According to embodiment of the present utility model, by drying tube preheating zone is set up in rotary hearth furnace, this does this utility model
Dry pipe is arranged at furnace wall side wall, using heat radiation mode preheating material, is heated using furnace wall burner on sidewall with conventional rotary hearth furnace
Mode compare, efficiently solve the problems, such as material enter the stove initial stage because Dust Capacity is larger cause burner block, drying tube heating
Temperature is 600 DEG C -1000 DEG C, and mixed material can be preheated, and effectively removes table water and water of crystallization in mixed material, is entered
Stove lateritic nickel ore typically contains the table water and the water of crystallization of 9-14% of 12-20%, if do not removed, by affect nickel in lateritic nickel ore also
Former effect, reduces the response rate of nickel, so the reducing process requirement of lateritic nickel ore can be met after the preheated process of compound.Not
Pressure ball and pelletizing stoving process before rotary hearth furnace are reduced on the premise of affecting product index, technological process is shortened, is reduced
Equipment investment, has the advantages that handling process is short, equipment investment is low, equipment operation rate is high, energy consumption is low, has wide range of applications.
According to the height that embodiment of the present utility model, the drying tube preheating zone are produced using the preheating and reduction apparatus
After warm flue gas removing dust device is processed, fume afterheat is recycled, and is passed through in drying tube as drying tube preheating zone heat source, is carried
High equipment thermal efficiency, reduces energy consumption.
According to embodiment of the present utility model, be provided between the drying tube preheating zone and the burner on sidewall reducing zone every
Wall 6, is provided with barricade 7 between the burner on sidewall reducing zone and the discharge zone, the partition wall and barricade are by the rotary hearth furnace
Roof extend downwardly, and keep certain intervals with the cloth ring-shaped furnace bottom of the rotary hearth furnace.
It is unrestricted according to the concrete material of embodiment of the present utility model, the preheating zone and reducing zone division wall, only
Separation can be played a part of, can be refractory brick or fire resisting stamp mass, according to some embodiments of the present utility model,
This utility model is preferably refractory brick.
According to embodiment of the present utility model, the concrete material of the discharge end barricade is unrestricted, as long as can play
The effect of stop, can be refractory brick or fire resisting stamp mass, according to some embodiments of the present utility model, this utility model
Preferably refractory brick.
According to embodiment of the present utility model, the drying tube preheating zone is provided with multiple drying tubes 8 on the inside of furnace wall, for right
Heated the drying tube preheating zone；The burner on sidewall reducing zone is provided with multiple burners 9 on the inside of furnace wall, for the side
Wall burner reducing zone carries out burner mode heating.
It is unrestricted according to the concrete number and shape of embodiment of the present utility model, the drying tube and burner, as long as
Dry heat can be played a part of, wherein, the shape of the drying tube can be p-shaped, W shapes or U-shaped, according to this practicality
Some new embodiments, this utility model drying tube are preferably U-shaped.
According to embodiment of the present utility model, the dust arrester includes：Smoke inlet 301, dedusting exhanst gas outlet 302 and
Dust outlet 303, the smoke inlet are connected with the preheating and the exhanst gas outlet of reduction apparatus, the dedusting exhanst gas outlet and
The preheating is connected with the drying tube thermal source inlet of reduction apparatus.
According to the height that embodiment of the present utility model, the drying tube preheating zone are produced using the preheating and reduction apparatus
After warm flue gas removing dust device is processed, fume afterheat is recycled, and is passed through in drying tube as drying tube preheating zone heat source, is carried
High equipment thermal efficiency, reduces energy consumption.
According to embodiment of the present utility model, the segregation apparatuss include：Reducing material entrance 401, ferro-nickel product is exported
402 and tailings outlet 403, the reducing material entrance with it is described preheating and reduction apparatus reducing material export be connected, be used for
Ferro-nickel product and tailings are finally given after the reducing material is carried out slag sluicing system.
In other side of the present utility model, this utility model provides a kind of red using the process of foregoing system
The method of native nickel minerals.Fig. 3 is the schematic flow sheet that this utility model processes lateritic nickel ore, with reference to shown in Fig. 3, the method include with
Lower step：
（1）Feedstock treating：Lateritic nickel ore, reducing agent and additive are mixed in proportion Jing after broken, screening, is obtained
Aqueous mixture material.
According to embodiment of the present utility model, the lateritic nickel ore, the reducing agent and additive gained Jing after broken, screening is former
The concrete granularity of material is unrestricted, and according to some embodiments of the present utility model, this utility model is preferably 10-40mm.
According to embodiment of the present utility model, the material processing device has lateritic nickel ore entrance 101, reduction coal entrance
102nd, additive entrance 103 and aqueous mixture material outlet 104, for by the lateritic nickel ore, reducing agent and additive Jing
Mixed after reason in proportion, obtained aqueous mixture material.
According to embodiment of the present utility model, the concrete species of the reducing agent is unrestricted, can for coke, semicoke or
Person's reduction coal, according to some embodiments of the present utility model, this utility model is preferably reduction coal.
According to embodiment of the present utility model, raw material weight proportioning of soup processed is：100 weight portion of lateritic nickel ore, reduction coal 10-30 weights
Amount part, additive 5-15 weight portions；The additive be selected from alkali metal oxide, alkali metal salt, alkaline earth oxide and
One or more in alkali salt.
（2）Preheating reduction treatment：By aqueous mixture material to cloth in the preheating and reduction apparatus, with the preheating
With the operating of reduction apparatus furnace bottom, the aqueous mixture material is dried in drying tube preheating zone successively, the pre-heat treatment, then
Reduction reaction is carried out in burner on sidewall reducing zone described in Jing, wherein, drying tube preheating zone is produced using the preheating and reduction apparatus
After raw high-temperature flue gas removing dust device is processed, it is passed through in drying tube as drying tube preheating zone heat source, then, by institute
State reducing material outlet discharge and obtain reducing material.
According to embodiment of the present utility model, the preheating and reduction apparatus include：Adjacent successively feed zone 1, it is dried
Pipe preheating zone 2, burner on sidewall reducing zone 3 and discharge zone 4, wherein, the feed zone is provided with aqueous mixture material entrance 201, institute
State drying tube preheating zone furnace wall and be provided with drying tube thermal source inlet 202 and exhanst gas outlet 204, the discharge zone is provided with reducing material
Outlet 203, the aqueous mixture material outlet of the aqueous mixture material entrance and the material processing device are connected, for by institute
State aqueous mixture material to be dried in the preheating and reduction apparatus, preheat and reduction treatment, obtain reducing material.
According to embodiment of the present utility model, in the preheating and reduction apparatus, the temperature of drying tube preheating zone heating is
600 DEG C -1000 DEG C, the time is 20-40min；Reducing zone adopt outboard sidewalls burner mode of heating, reduction temperature be 1150 DEG C-
1350 DEG C, the time is 20-50min.
（3）Separating treatment：The reducing material, after carrying out slag sluicing system, obtains ferro-nickel product and tailings.
According to embodiment of the present utility model, the dust arrester includes：Smoke inlet 301, dedusting exhanst gas outlet 302 and
Dust outlet 303, the smoke inlet are connected with the preheating and the exhanst gas outlet of reduction apparatus, the dedusting exhanst gas outlet and
The preheating is connected with the drying tube thermal source inlet of reduction apparatus.
According to the height that embodiment of the present utility model, the drying tube preheating zone are produced using the preheating and reduction apparatus
After warm flue gas removing dust device is processed, fume afterheat is recycled, and is passed through in drying tube as drying tube preheating zone heat source, is carried
High equipment thermal efficiency, reduces energy consumption.
According to embodiment of the present utility model, the segregation apparatuss include：Reducing material entrance 401, ferro-nickel product is exported
402 and tailings outlet 403, the reducing material entrance with it is described preheating and reduction apparatus reducing material export be connected, be used for
Ferro-nickel product and tailings are finally given after the reducing material is carried out slag sluicing system.
The concrete species of the slag sluicing system technique is unrestricted, as long as can be separated material as desired i.e.
Can, according to some embodiments of the present utility model, this utility model is preferably mill ore magnetic selection technique or molten division technique.
Embodiment 1：
From TFe20.6%, the lateritic nickel ore containing Ni 1.65% is crushed, is sized to 10-40mm, according to red as raw material
100 weight portion of native nickel minerals, 10 weight portion of reduction coal, the part by weight dispensing of 5 weight portion of sodium carbonate are simultaneously mixed, by aqueous mixture
Expect the cloth into the preheating and reduction apparatus, with the preheating and the operating of reduction apparatus furnace bottom, the aqueous mixture
Material is dried in drying tube preheating zone successively, carries out reduction reaction in the pre-heat treatment, then burner on sidewall reducing zone described in Jing,
Wherein, after drying tube preheating zone is processed using the high-temperature flue gas removing dust device that the preheating and reduction apparatus are produced, it is passed through dry
As drying tube preheating zone heat source in dry pipe, then, discharge is exported by the reducing material and obtains reducing material, preheated
It is improved rotary hearth furnace with reduction apparatus, sets up drying tube preheating zone in stove, the temperature of heating is 600 DEG C, the time is
40min；Reducing zone adopts outboard sidewalls burner mode of heating, and reduction temperature is 1150 DEG C, and the time is 50min, the circle of preheating zone
Ring angle is 30 °；The reducing material that preheating and reduction apparatus discharging are obtained sends into segregation apparatuss carries out slag sluicing system process, adopts
Mill ore magnetic selection technique carries out slag sluicing system, finally gives the ferronickel powder of nickel grade 6.3%, nickel recovery 91%.
Embodiment 2：
From TFe18.7%, the lateritic nickel ore containing Ni 1.76% is crushed, is sized to 10-40mm, according to red as raw material
100 weight portion of native nickel minerals, 20 weight portion of reduction coal, the part by weight dispensing of 15 weight portion of limestone are simultaneously mixed, by aqueous mixing
Material is preheated and cloth in reduction apparatus to described, with the preheating and the operating of reduction apparatus furnace bottom, the aqueous mixing
Material is dried in drying tube preheating zone successively, it is anti-to carry out in the pre-heat treatment, then burner on sidewall reducing zone described in Jing reducing
Should, wherein, after drying tube preheating zone is processed using the high-temperature flue gas removing dust device that the preheating and reduction apparatus are produced, it is passed through
As drying tube preheating zone heat source in drying tube, then, discharge is exported by the reducing material and obtains reducing material, in advance
Heat and reduction apparatus are improved rotary hearth furnace, set up drying tube preheating zone in stove, and the temperature of heating is 800 DEG C, and the time is
30min；Reducing zone adopts outboard sidewalls burner mode of heating, and reduction temperature is 1250 DEG C, and the time is 30min, the circle of preheating zone
Ring angle is 60 °；The reducing material that preheating and reduction apparatus discharging are obtained sends into segregation apparatuss carries out slag sluicing system process, adopts
Molten division technique carries out slag sluicing system, finally gives the dilval of nickel grade 17%, nickel recovery 96%.
Embodiment 3：
From TFe29.6%, the lateritic nickel ore containing Ni 1.46% is crushed, is sized to 10-40mm, according to red as raw material
100 weight portion of native nickel minerals, 30 weight portion of reduction coal, the part by weight dispensing of 10 weight portion of quick lime are simultaneously mixed, by aqueous mixing
Material is preheated and cloth in reduction apparatus to described, with the preheating and the operating of reduction apparatus furnace bottom, the aqueous mixing
Material is dried in drying tube preheating zone successively, it is anti-to carry out in the pre-heat treatment, then burner on sidewall reducing zone described in Jing reducing
Should, wherein, after drying tube preheating zone is processed using the high-temperature flue gas removing dust device that the preheating and reduction apparatus are produced, it is passed through
As drying tube preheating zone heat source in drying tube, then, discharge is exported by the reducing material and obtains reducing material, in advance
Heat and reduction apparatus are improved rotary hearth furnace, set up drying tube preheating zone interior, and the temperature of heating is 1000 DEG C, and the time is
20min；Reducing zone adopts outboard sidewalls burner mode of heating, and reduction temperature is 1350 DEG C, and the time is 20min, the circle of preheating zone
Ring angle is 100 °；The reducing material that preheating and reduction apparatus discharging are obtained sends into segregation apparatuss carries out slag sluicing system process, adopts
Slag sluicing system is carried out with molten division technique, the dilval of nickel grade 15%, nickel recovery 95% is finally given.
Inventor is had found, according to the system of this utility model embodiment, is burnt using furnace wall side wall with conventional rotary hearth furnace
The mode of mouth heating is compared, and sets up drying tube preheating zone, solve material and enter the stove initial stage because of powder in rotary hearth furnace of the present utility model
The problem that dust quantity is big and causes burner to block；And this utility model can adopt wet block directly enter rotary hearth furnace flow processing it is red
Native nickel minerals, shortens technological process, reduces equipment investment, production cost and energy consumption；Simultaneously the system using preheating and
It is passed through in drying tube as drying tube preheating zone heat source, fume afterheat after the process of reduction apparatus high-temperature flue gas removing dust device
Recycle, improve equipment thermal efficiency, reduce energy consumption；Additionally, this utility model rotary hearth furnace can adopt regenerative combustion technology,
Fuel cost can be reduced using inferior or low-rank fuel, at home and natural gas can be lacked and the area of high-grade fuel pushes away
Extensively.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features, the knot described with reference to the embodiment or example
Structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, to above-mentioned art
The schematic representation of language is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or
Person's feature can be combined in one or more any embodiment or example in an appropriate manner.
In description of the present utility model, it is to be understood that term " first ", " second " are only used for describing purpose, and
It is not intended that indicating or implying relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define
The feature of " first ", " second " can be expressed or implicitly include one or more this feature.Of the present utility model
In description, unless otherwise stated, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be mechanically connected, or put connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in this utility model.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to restriction of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, be changed, being replaced and modification, simultaneously for one of ordinary skill in the art, foundation
The thought of the application, will change in specific embodiments and applications.
Claims (3)
1. wet piece of lateritic nickel ore processing system of a kind of fume afterheat recycling type, it is characterised in that include：Material processing device,
Preheating and reduction apparatus, dust arrester and segregation apparatuss, wherein：
The material processing device, including the breaker, screening plant and mixing arrangement that are sequentially connected, the Feedstock treating dress
Put and export with lateritic nickel ore entrance, reduction coal entrance, additive entrance and aqueous mixture material, for by the laterite nickel
Ore deposit, reducing agent and additive are mixed in proportion Jing after processing, and obtain aqueous mixture material；
The preheating and reduction apparatus are improved rotary hearth furnace, including：Adjacent feed zone, drying tube preheating zone, side successively
Wall burner reducing zone and discharge zone, wherein, partition wall is provided between the drying tube preheating zone and the burner on sidewall reducing zone, institute
State and between burner on sidewall reducing zone and the discharge zone, be provided with barricade, the partition wall and barricade by the rotary hearth furnace roof to
Lower extension, and certain intervals are kept with the cloth ring-shaped furnace bottom of the rotary hearth furnace；Wherein, on the inside of the furnace wall of the drying tube preheating zone
Multiple drying tubes are provided with, for heating to the drying tube preheating zone；The burner on sidewall reducing zone is provided with the inside of furnace wall
Multiple burners, for carrying out burner mode heating to the burner on sidewall reducing zone；The feed zone is provided with aqueous mixture material
Entrance, drying tube preheating zone furnace wall are provided with drying tube thermal source inlet and exhanst gas outlet, and the discharge zone is provided with reduzate
Material outlet, the aqueous mixture material outlet of the aqueous mixture material entrance and the material processing device are connected, for by institute
State aqueous mixture material to be dried in the preheating and reduction apparatus, preheat and reduction treatment, obtain reducing material；
The dust arrester includes：Smoke inlet, dedusting exhanst gas outlet and dust outlet, the smoke inlet with it is described preheating and
The exhanst gas outlet of reduction apparatus is connected, the drying tube thermal source inlet phase of the dedusting exhanst gas outlet and the preheating and reduction apparatus
Even；
The segregation apparatuss include：Reducing material entrance, ferro-nickel product outlet and tailings outlet, the reducing material entrance and institute
State to preheat and be connected with the reducing material outlet of reduction apparatus, for nickel being finally given after the reducing material is carried out slag sluicing system
Iron product and tailings.
2. system according to claim 1, it is characterised in that the horizontal cross-section of the preheating and reduction apparatus is annulus
Shape, the drying tube preheating zone annulus angle is 30 ° -100 °.
3. system according to claim 1, it is characterised in that the drying tube preheating zone is using the preheating and also original-pack
After putting the high-temperature flue gas removing dust device process of generation, it is passed through in drying tube as drying tube preheating zone heat source.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106381381A (en) * | 2016-09-13 | 2017-02-08 | 江苏省冶金设计院有限公司 | Flue gas waste heat recycling type wet block laterite nickel ore processing system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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