CN106191363A - The processing system of a kind of wet piece of lateritic nickel ore and method - Google Patents
The processing system of a kind of wet piece of lateritic nickel ore and method Download PDFInfo
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- CN106191363A CN106191363A CN201610818999.XA CN201610818999A CN106191363A CN 106191363 A CN106191363 A CN 106191363A CN 201610818999 A CN201610818999 A CN 201610818999A CN 106191363 A CN106191363 A CN 106191363A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The invention belongs to field of metallurgy, be specifically related to processing system and the method for a kind of wet piece of lateritic nickel ore.This system includes: material processing device, preheating and reduction apparatus, segregation apparatus, wherein: described material processing device, fills including the breaker being sequentially connected with, screening plant and mixing；Described preheating and reduction apparatus include: the most adjacent feed zone, drying tube preheating zone, burner on sidewall reducing zone and discharge zone；Described segregation apparatus includes: reducing material entrance, ferro-nickel product outlet and tailings outlet.The present invention can use wet block directly to enter the flow processing lateritic nickel ore of rotary hearth furnace, shortens technological process, reduces equipment investment, production cost and energy consumption；Rotary hearth furnace of the present invention can use regenerative combustion technology, can use poor quality or low-rank fuel, reduce fuel cost, can promote with the area lacking natural gas and high-grade fuel at home.
Description
Technical field
The invention belongs to field of metallurgy, be specifically related to processing system and the method for a kind of wet piece of lateritic nickel ore.
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 constantly reduce, the exploitation of nickel laterite be increasingly subject to pay attention to.Lateritic nickel ore
Being essentially divided into two classes, a class is limonite type, is positioned at the top in mineral deposit, and due to the result of weathering eluviation, ferrum is many, silicon
Few, magnesium is few, and nickel is relatively low, but the amount Han cobalt is higher, and this Ore preferably uses hydrometallurgical processes to process, the slag that smelting ferronickel produces
Production for steel；Another kind of is garnierite, is positioned at the bottom in mineral deposit, due to air slaking be enriched with, the many silicon of nickel minerals, many magnesium, low ferrum,
Cobalt, nickel content is higher, referred to as garnirite, and this Ore preferably uses fire metallurgy process to process, and produces ferronickel and produces
Slag can be used for construction material and produce chemical fertilizer.The Ore being in intermediate layer can use pyrometallurgy, it is also possible to adopts
Use hydrometallurgical processes.Use in the process of traditional pyrometallurgical smelting ferronickel and all have the disadvantage that process environments pollutes
Seriously, energy consumption is high, runs counter to the restriction of national environmental protection policy and energy policy；Require that ore has higher nickel grade；Revolution
Kiln reduction temperature ring formation low, easy；Produce finished product nickel grade low；Productivity is low.As Chinese patent CN 102212636A discloses one
The iron smelting method that point stove melts point is melted in kind of lateritic nickel ore rotary hearth furnace coal-based direct reduction combustion gas, by lateritic nickel ore and coal and flux
Pelletizing after mixing, dry bulb carries out direct-reduction and obtains metallized pellet in being distributed into rotary hearth furnace, metallized pellet feeding coal gas is made
The molten point stove of the regenerative gas of fuel carries out molten point, finally gives nickelic dilval, and this invention raw material need to carry out pelletizing, baking
Doing and wait pretreatment, complex manufacturing, equipment investment is high.In recent years, some experts and scholar propose " to turn the end with coal base in the industry
Stove process lateritic nickel ore " new method, reduction process completes in main equipment rotary hearth furnace, and the most ripe technique mostly is mixed
Material, ball processed, be dried etc. is distributed into rotary hearth furnace after pretreatment again, and before rotary hearth furnace reduction, pretreatment process is more complicated, has production technology
Long flow path, the defects such as equipment investment is big, and production cost is high, and energy consumption is high, additionally, existing rotary hearth furnace many employings burner formula heating side
Formula, but in entering stove initial stage stove due to material, Dust Capacity is relatively big, is easily caused burner blocking thus affects production direct motion.The most how to set
Count the system and method processing lateritic nickel ore that a kind of technological process is short, equipment investment is low and energy consumption is low and become this area urgently
Need to solve the technical problem that.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that the processing system of a kind of wet piece of lateritic nickel ore and method.This is
System has that technological process is short, equipment investment is low and the advantage such as energy consumption is low.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The present invention proposes the processing system of a kind of wet piece of lateritic nickel ore.According to embodiments of the invention, this system includes: raw material
Processing means, preheating and reduction apparatus, segregation apparatus, wherein: described material processing device, including the broken dress being sequentially connected with
Put, screening plant and mixing arrangement, described material processing device has lateritic nickel ore entrance, reduction coal entrance, additive entrance
And the outlet of aqueous mixture material, for described lateritic nickel ore, reducing agent and additive are mixed the most in proportion,
To aqueous mixture material；Described preheating and reduction apparatus are improved rotary hearth furnace, including: the most adjacent feed zone, are dried
Pipe preheating zone, burner on sidewall reducing zone and discharge zone, wherein, between described drying tube preheating zone and described burner on sidewall reducing zone
It is provided with partition wall, is provided with barricade, described partition wall and barricade between described burner on sidewall reducing zone and described discharge zone by described turn
The roof of end stove downwardly extends, and keeps certain intervals with the cloth ring-shaped furnace bottom of described rotary hearth furnace；Wherein, described drying tube is pre-
Multiple drying tube it is provided with, for described drying tube preheating zone is heated inside furnace wall, hot-zone；Described burner on sidewall reducing zone
Multiple burner it is provided with, for described burner on sidewall reducing zone is carried out burner mode heating inside furnace wall；Described feed zone is provided with
Aqueous mixture material entrance, described drying tube preheating zone is provided with exhanst gas outlet, and described discharge zone is provided with reducing material outlet, described
Aqueous mixture material entrance exports with the aqueous mixture material of described material processing device and is connected, for by described aqueous mixture
Material is dried in described preheating and reduction apparatus, preheats and reduction treatment, obtains reducing material；Described segregation apparatus bag
Including: reducing material entrance, ferro-nickel product outlet and tailings outlet, described reducing material entrance and described preheating and reduction apparatus are also
Raw material outlet is connected, and finally gives ferro-nickel product and tailings after described reducing material is carried out slag sluicing system.
Inventor finds, this system according to embodiments of the present invention all uses furnace wall burner on sidewall to add with conventional rotary hearth furnace
The mode of heat is compared, and sets up drying tube preheating zone in the rotary hearth furnace of the present invention, solves material and enters the stove initial stage because Dust Capacity is big
Cause the problem that burner blocks；The present invention can use wet block directly to enter the flow processing lateritic nickel ore of rotary hearth furnace, shortens work
Process flow, reduces equipment investment, production cost and energy consumption；Rotary hearth furnace of the present invention can use regenerative combustion technology, can
Use poor quality or low-rank fuel, reduce fuel cost, can promote with the area lacking natural gas and high-grade fuel at home.
According to embodiments of the invention, the horizontal cross-section of described preheating and reduction apparatus is annular, and described drying tube is pre-
Hot-zone annulus angle is 30 °-100 °.
According to embodiments of the invention, described segregation apparatus can be mill ore magnetic selection device or molten separating device.
In another aspect of the present invention, the invention provides and a kind of utilize foregoing system to process lateritic nickel ore
Method.According to embodiments of the invention, the method comprises the following steps: (1) Feedstock treating: by lateritic nickel ore, reducing agent and add
Add agent to mix in proportion after crushing, sieving, obtain aqueous mixture material；(2) preheating reduction treatment: by aqueous mixture
Material cloth in described preheating and reduction apparatus, along with described preheating and the operating of reduction apparatus furnace bottom, described mixed material depends on
Secondary be dried in drying tube preheating zone, the pre-heat treatment, then in described burner on sidewall reducing zone, carry out reduction reaction, then
Reducing material is obtained by described reducing material outlet discharge；(3) separating treatment: described reducing material is through described smelting apparatus
After carrying out slag sluicing system, obtain ferro-nickel product and tailings.
According to embodiments of the invention, described reducing agent is reduction coal.
According to embodiments of the invention, described lateritic nickel ore, reducing agent and additive be gained raw material grain after crushing, sieving
Degree is 10-40mm.
According to embodiments of the invention, raw material weight proportioning is: lateritic nickel ore 100 weight portion, reduction coal 10-30 weight
Part, additive 5-15 weight portion；Described additive is selected from alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali
One or more in earth metal salt.
According to embodiments of the invention, the drying tube preheating zone heating-up temperature of described preheating and reducing zone is 600 DEG C-1000
DEG C, the time is 20-40min；Described reducing zone uses burner on sidewall mode of heating, and reduction temperature is 1150 DEG C-1350 DEG C, the time
For 20-50min.
The present invention at least has the advantages that
1., compared with the mode that conventional rotary hearth furnace all uses furnace wall burner on sidewall to heat, in the rotary hearth furnace of the present invention, set up drying tube
Preheating zone, solves the problem that material enters the stove initial stage and causes burner to block because Dust Capacity is big.
2. the present invention can use wet block directly to enter the flow processing lateritic nickel ore of rotary hearth furnace, shortens technological process, fall
Low equipment investment, production cost and energy consumption.
Rotary hearth furnace the most of the present invention can use regenerative combustion technology, can use poor quality or low-rank fuel, reduce fuel
Cost, can promote with the area lacking natural gas and high-grade fuel at home.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention transforms rotary hearth furnace.
Fig. 2 is the system schematic that the present invention processes lateritic nickel ore.
Fig. 3 is the schematic flow sheet that the present invention 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, reducing material outlet 202, exhanst gas outlet 203, segregation apparatus S300, reducing material entrance 301, ferro-nickel product outlet 302,
Tailings outlet 303.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment to this
Invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, and is not understood that
For limitation of the present invention.
The present invention proposes the processing system of a kind of wet piece of lateritic nickel ore.According to embodiments of the invention, Fig. 1 is the present invention
The schematic diagram of transformation rotary hearth furnace, Fig. 2 is the system schematic that the present invention processes lateritic nickel ore, sees figures.1.and.2 shown, and this is
System includes: material processing device S100, preheating and reduction apparatus S200, segregation apparatus S300, wherein: described material processing device
There is lateritic nickel ore entrance 101, reduction coal entrance 102, additive entrance 103 and aqueous mixture material outlet 104, for by institute
State lateritic nickel ore, reducing agent and additive to mix the most in proportion, obtain aqueous mixture material；Described preheating and also
Original device includes: the most adjacent feed zone 1, drying tube preheating zone 2, burner on sidewall reducing zone 3 and discharge zone 4；Wherein, described
Feed zone is provided with aqueous mixture material entrance 201, and described drying tube preheating zone is provided with exhanst gas outlet 203, and described discharge zone is provided with
Reducing material outlet 202, described aqueous mixture material entrance exports with the aqueous mixture material of described material processing device and is connected,
For described aqueous mixture material is dried in described preheating and reduction apparatus, preheats and reduction treatment, reduced
Material；Described segregation apparatus includes: reducing material entrance 301, ferro-nickel product outlet 302 and tailings outlet 303, described reduzate
Material entrance and described preheating and reduction apparatus reducing material export and are connected, are used for carrying out described reducing material after slag sluicing system
Obtain ferro-nickel product and tailings eventually.
Inventor finds, this system according to embodiments of the present invention all uses furnace wall burner on sidewall to add with conventional rotary hearth furnace
The mode of heat is compared, and sets up drying tube preheating zone in the rotary hearth furnace of the present invention, solves material and enters the stove initial stage because Dust Capacity is big
Cause the problem that burner blocks；The present invention can use wet block directly to enter the flow processing lateritic nickel ore of rotary hearth furnace, shortens work
Process flow, reduces equipment investment, production cost and energy consumption；Rotary hearth furnace of the present invention can use regenerative combustion technology, can
Use poor quality or low-rank fuel, reduce fuel cost, can promote with the area lacking natural gas and high-grade fuel at home.
According to embodiments of the invention, the concrete kind of described segregation apparatus is unrestricted, if can by material according to
Demand carries out separating, and according to some embodiments of the present invention, the present invention is preferably mill ore magnetic selection device or molten separating device.
According to embodiments of the invention, described material processing device, including the breaker being sequentially connected with, screening plant and
Mixing arrangement.
According to embodiments of the invention, the concrete kind of described breaker is unrestricted, as long as can reach bulk
Material is broken into the effect of suitable particle size, can be metal breaker, stone breaker, hogging device or mould
Material breaker, according to some embodiments of the present invention, the present invention is preferably metal breaker or stone breaker.
According to embodiments of the invention, the concrete kind of described screening plant and method are unrestricted, as long as can play
With compass screen surface with holes, mixed materials different for granule size is divided into the effect of various granularity level, can be revolving screen or
Shaking screen, independent screening, auxiliary screening or dehydration screening, according to some embodiments of the present invention, the present invention is preferably revolving screen
Or auxiliary screening.
According to embodiments of the invention, described preheating and reduction apparatus are improved rotary hearth furnace, wherein, and the tool of rotary hearth furnace
Build number is unrestricted, can be heat accumulating type or non-regenerative rotary hearth furnace.The horizontal cross-section of described preheating and reduction apparatus
Concrete shape is unrestricted, and according to some embodiments of the present invention, the present invention is preferably annular, is dried it is furthermore preferred that described
Pipe preheating zone annulus angle is 30 °-100 °, and rotary hearth furnace drying tube preheating zone of the present invention annulus angle is no less than 30 °, if annulus
Angle is less than 30 °, then material is the shortest at preheating zone remaining time, lateritic nickel ore moisture removal can be caused incomplete, residual moisture
In reducing zone, removing affects material district reproducibility, reduces the percent reduction of valuable metal, but when rotary hearth furnace preheating zone annulus angle mistake
Senior general affects the reduction effect of reducing zone material, so controlling preheating zone annulus angle to be not more than 100 °.
According to embodiments of the invention, the present invention passes through to set up drying tube preheating zone in described preheating and reduction apparatus,
This drying tube is arranged at furnace wall sidewall, uses heat radiation mode preheating material, all uses furnace wall burner on sidewall with conventional rotary hearth furnace
The mode of heating is compared, and efficiently solves the problem that material enters the stove initial stage and causes burner to block because Dust Capacity is relatively big, drying tube
Heating-up temperature is 600 DEG C-1000 DEG C, can preheat mixed material, and effectively removes the table water in mixed material and crystallization
Water, enters stove lateritic nickel ore and typically contains table water and the water of crystallization of 9-14% of 12-20%, if do not removed, will affect in lateritic nickel ore
The reduction effect of nickel, reduces the response rate of nickel, so the reducing process that can meet lateritic nickel ore after the preheated process of compound is wanted
Ask.Pressure ball before decreasing rotary hearth furnace on the premise of not affecting product index and pelletizing stoving process, shorten technique stream
Journey, reduces equipment investment, has that handling process is short, equipment investment is low, equipment operation rate is high, energy consumption is low, has wide range of applications
Etc. advantage.
According to embodiments of the invention, between described drying tube preheating zone and described burner on sidewall reducing zone, it is provided with partition wall 6,
Barricade 7, described partition wall and the barricade top by described rotary hearth furnace it is provided with between described burner on sidewall reducing zone and described discharge zone
Wall downwardly extends, and keeps certain intervals with the cloth ring-shaped furnace bottom of described rotary hearth furnace.
Concrete material according to embodiments of the invention, described preheating zone and reducing zone division wall is unrestricted, if energy
Enough playing the effect of separation, can be refractory brick or fire-resistant stamp mass, according to some embodiments of the present invention, the present invention be excellent
Elect refractory brick as.
According to embodiments of the invention, the concrete material of described discharge end barricade is unrestricted, as long as stop can be played
Effect, can be refractory brick or fire-resistant stamp mass, according to some embodiments of the present invention, the present invention is the most fire-resistant
Brick.
According to embodiments of the invention, described drying tube preheating zone is provided with multiple drying tube 8 inside furnace wall, for described
Drying tube preheating zone is heated；Described burner on sidewall reducing zone is provided with multiple burner 9 inside furnace wall, for burning described sidewall
Mouth reducing zone carries out burner mode heating.
Concrete number and shape according to embodiments of the invention, described drying tube and burner are unrestricted, as long as can rise
To the effect of dry heat, wherein, the shape of described drying tube can be p-shaped, W shape or U-shaped, according to the one of the present invention
A little embodiments, drying tube of the present invention is the most U-shaped, and the concrete mode of heating of described drying tube is unrestricted, according to the present invention's
Some embodiments, the present invention be preferably electrical heating, gas heating, high-temperature flue gas waste heat one or more.
In another aspect of the present invention, the invention provides and a kind of utilize foregoing system to process lateritic nickel ore
Method.Fig. 3 is the schematic flow sheet that the present invention processes lateritic nickel ore, and with reference to shown in Fig. 3, the method comprises the following steps:
(1) Feedstock treating: lateritic nickel ore, reducing agent and additive are mixed after crushing, sieving in proportion, obtains aqueous
Mixed material.
According to embodiments of the invention, described material processing device S100 has lateritic nickel ore entrance 101, reduction coal entrance
102, additive entrance 103 and aqueous mixture material outlet 104, be used for described lateritic nickel ore, reducing agent and additive through place
Mix in proportion after reason, obtain aqueous mixture material.
According to embodiments of the invention, the concrete kind of described reducing agent is unrestricted, can be coke, semicoke or also
Raw coal, according to some embodiments of the present invention, the present invention is preferably reduction coal.
According to embodiments of the invention, raw material weight proportioning is: lateritic nickel ore 100 weight portion, reduction coal 10-30 weight
Part, additive 5-15 weight portion；Described additive is selected from alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali
One or more in earth metal salt.
According to embodiments of the invention, described lateritic nickel ore, reducing agent and additive be gained raw material after crushing, sieving
Concrete granularity is unrestricted, and according to some embodiments of the present invention, the present invention is preferably 10-40mm.
(2) preheating reduction treatment: by aqueous mixture material cloth in described preheating and reduction apparatus, along with described preheating
With the operating of reduction apparatus furnace bottom, described mixed material is dried successively in drying tube preheating zone, the pre-heat treatment, then through institute
Carry out reduction reaction in stating burner on sidewall reducing zone, then obtain reducing material by described reducing material outlet discharge.
Include according to embodiments of the invention, described preheating and reduction apparatus S200: the most adjacent feed zone 1, be dried
Pipe preheating zone 2, burner on sidewall reducing zone 3 and discharge zone 4；Wherein, described feed zone is provided with aqueous mixture material entrance 201, institute
Stating drying tube preheating zone and be provided with exhanst gas outlet 203, described discharge zone is provided with reducing material outlet 202, described aqueous mixture material
Entrance exports with the aqueous mixture material of described material processing device and is connected, and is used for described aqueous mixture material in described preheating
Be dried in reduction apparatus, preheat and reduction treatment, obtain reducing material.
According to embodiments of the invention, the drying tube preheating zone heating-up temperature of described preheating and reducing zone is 600 DEG C-1000
DEG C, the time is 20-40min；Described reducing zone uses burner on sidewall mode of heating, and reduction temperature is 1150 DEG C-1350 DEG C, the time
For 20-50min.
(3) separating treatment: described reducing material after described smelting apparatus carries out slag sluicing system, obtain ferro-nickel product and
Tailings.
According to embodiments of the invention, described segregation apparatus S300 includes: reducing material entrance 301, and ferro-nickel product exports
302 and tailings outlet 303, described reducing material entrance and described preheating and reduction apparatus reducing material export and be connected, for general
Described reducing material finally gives ferro-nickel product and tailings after carrying out slag sluicing system.
Embodiment 1:
Selecting TFe20.6%, the lateritic nickel ore containing Ni 1.65%, as raw material, crushes, is sized to 10-40mm, according to laterite nickel
Ore deposit 100 weight portion, reduction coal 10 weight portion, the part by weight dispensing of sodium carbonate 5 weight portion also mixes, by direct for mixed material cloth
Entering preheating and reduction apparatus carries out preheating reduction treatment, preheating and reduction apparatus are improved rotary hearth furnace, set up dry in stove
Dry pipe preheating zone, the temperature of heating is 600 DEG C, and the time is 40min；Reducing zone uses outboard sidewalls burner mode of heating, reduction
Temperature is 1150 DEG C, and the time is 50min, and the annulus angle of preheating zone is 30 °；The reduzate that preheating and reduction apparatus discharging obtain
Material is sent into segregation apparatus and is carried out slag sluicing system process, uses mill ore magnetic selection technique to carry out slag sluicing system, and finally giving nickel product is
The dilval of 6.2%, nickel recovery 90%.
Embodiment 2:
Selecting TFe18.7%, the lateritic nickel ore containing Ni 1.76%, as raw material, crushes, is sized to 10-40mm, according to laterite nickel
Ore deposit 100 weight portion, reduction coal 20 weight portion, the part by weight dispensing of limestone 15 weight portion also mixes, and mixed material is direct
Being distributed into preheating and reduction apparatus carries out preheating reduction treatment, preheating and reduction apparatus are improved rotary hearth furnace, set up in stove
Drying tube preheating zone, the temperature of heating is 800 DEG C, and the time is 30min；Reducing zone uses outboard sidewalls burner mode of heating, also
Former temperature is 1250 DEG C, and the time is 30min, and the annulus angle of preheating zone is 60 °；The reduction that preheating and reduction apparatus discharging obtain
Material is sent into segregation apparatus and is carried out slag sluicing system process, uses molten division technique to carry out slag sluicing system, and finally giving nickel product is 16%
Dilval, nickel recovery 95%.
Embodiment 3:
Selecting TFe29.6%, the lateritic nickel ore containing Ni 1.46%, as raw material, crushes, is sized to 10-40mm, according to laterite nickel
Ore deposit 100 weight portion, reduction coal 30 weight portion, the part by weight dispensing of quick lime 10 weight portion also mixes, and mixed material is direct
Be distributed into preheating and reduction apparatus carry out preheat reduction treatment, preheating and reduction apparatus be improved rotary hearth furnace, interior set up dry
Dry pipe preheating zone, the temperature of heating is 1000 DEG C, and the time is 20min；Reducing zone uses outboard sidewalls burner mode of heating, reduction
Temperature is 1350 DEG C, and the time is 20min, and the annulus angle of preheating zone is 100 °；The reduction that preheating and reduction apparatus discharging obtain
Material is sent into segregation apparatus and is carried out slag sluicing system process, uses molten division technique to carry out slag sluicing system, and finally giving nickel product is 15%
Dilval, nickel recovery 94%.
Inventor finds, this system according to embodiments of the present invention all uses furnace wall burner on sidewall to add with conventional rotary hearth furnace
The mode of heat is compared, and sets up drying tube preheating zone in the rotary hearth furnace of the present invention, solves material and enters the stove initial stage because Dust Capacity is big
Cause the problem that burner blocks；The present invention can use wet block directly to enter the flow processing lateritic nickel ore of rotary hearth furnace, shortens work
Process flow, reduces equipment investment, production cost and energy consumption；Rotary hearth furnace of the present invention can use regenerative combustion technology, can
Use poor quality or low-rank fuel, reduce fuel cost, can promote with the area lacking natural gas and high-grade fuel at home.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " concrete example " or " some examples " etc. means to combine this embodiment or the specific features of example description, knot
Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy
Point can combine in any one or more embodiments or example in an appropriate manner.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include one or more this feature.In describing the invention,
Except as otherwise noted, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be a connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification, simultaneously for one of ordinary skill in the art, according to the think of of the application
Think, the most all will change.
Claims (8)
1. the processing system of a wet piece of lateritic nickel ore, it is characterised in that including: material processing device, preheating and reduction apparatus,
Segregation apparatus, wherein:
Described material processing device, including the breaker being sequentially connected with, screening plant and mixing arrangement, described Feedstock treating fills
Put and there is lateritic nickel ore entrance, reduction coal entrance, additive entrance and the outlet of aqueous mixture material, for by described laterite nickel
Ore deposit, reducing agent and additive mix the most in proportion, obtain aqueous mixture material；
Described preheating and reduction apparatus are improved rotary hearth furnace, including: the most adjacent feed zone, drying tube preheating zone, side
Wall burner reducing zone and discharge zone, wherein, be provided with partition wall between described drying tube preheating zone and described burner on sidewall reducing zone, institute
State and between burner on sidewall reducing zone and described discharge zone, be provided with barricade, described partition wall and barricade by described rotary hearth furnace roof to
Lower extension, and keep certain intervals with the cloth ring-shaped furnace bottom of described rotary hearth furnace；Wherein, inside furnace wall, described drying tube preheating zone
It is provided with multiple drying tube, for described drying tube preheating zone is heated；Described burner on sidewall reducing zone is provided with inside furnace wall
Multiple burners, for carrying out burner mode heating to described burner on sidewall reducing zone；Described feed zone is provided with aqueous mixture material
Entrance, described drying tube preheating zone is provided with exhanst gas outlet, and described discharge zone is provided with reducing material outlet, described aqueous mixture material
Entrance exports with the aqueous mixture material of described material processing device and is connected, and is used for described aqueous mixture material in described preheating
Be dried in reduction apparatus, preheat and reduction treatment, obtain reducing material；
Described segregation apparatus includes: reducing material entrance, ferro-nickel product outlet and tailings outlet, described reducing material entrance and institute
State preheating to be connected with the outlet of reduction apparatus reducing material, after described reducing material is carried out slag sluicing system, finally give ferronickel
Product and tailings.
System the most according to claim 1, it is characterised in that the horizontal cross-section of described preheating and reduction apparatus is annulus
Shape, described drying tube preheating zone annulus angle is 30 °-100 °.
System the most according to claim 1, it is characterised in that described segregation apparatus can be mill ore magnetic selection device or molten point
Device.
4. one kind utilizes described in claim 1 system processes the method for lateritic nickel ore, it is characterised in that include step:
(1) Feedstock treating: lateritic nickel ore, reducing agent and additive are mixed after crushing, sieving in proportion, obtains aqueous
Mixed material；
(2) preheating reduction treatment: by aqueous mixture material cloth in described preheating and reduction apparatus, along with described preheating and also
The operating of original device furnace bottom, described mixed material is dried successively in drying tube preheating zone, the pre-heat treatment, then through described side
Carry out reduction reaction in wall burner reducing zone, then obtain reducing material by described reducing material outlet discharge；
(3) separating treatment: described reducing material, after described smelting apparatus carries out slag sluicing system, obtains ferro-nickel product and tail
Slag.
Method the most according to claim 4, it is characterised in that described reducing agent is reduction coal.
Method the most according to claim 4, it is characterised in that described lateritic nickel ore, reducing agent and additive are through broken, sieve
After point, gained raw material granularity is 10-40mm.
Method the most according to claim 4, it is characterised in that raw material weight proportioning is: lateritic nickel ore 100 weight portion, also
Raw coal 10-30 weight portion, additive 5-15 weight portion；Described additive is selected from alkali metal oxide, alkali metal salt, alkaline earth gold
Belong to one or more in oxide and alkali salt.
Method the most according to claim 4, it is characterised in that the drying tube preheating zone heating temperature of described preheating and reducing zone
Degree is 600 DEG C-1000 DEG C, and the time is 20-40min；Described reducing zone uses burner on sidewall mode of heating, and reduction temperature is 1150
DEG C-1350 DEG C, the time is 20-50min.
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