CN106498183A - Process the system of lateritic nickel ore and its application in lateritic nickel ore is processed - Google Patents
Process the system of lateritic nickel ore and its application in lateritic nickel ore is processed Download PDFInfo
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- CN106498183A CN106498183A CN201610972281.6A CN201610972281A CN106498183A CN 106498183 A CN106498183 A CN 106498183A CN 201610972281 A CN201610972281 A CN 201610972281A CN 106498183 A CN106498183 A CN 106498183A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
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Abstract
The invention discloses processing the system of lateritic nickel ore and its application in lateritic nickel ore is processed.The system includes：Pelletizing formation system, rotary hearth furnace direct-reduction system and dry type magnetic separation system；Wherein, the feeding mouth that the discharging opening of the pelletizing formation system is reduced directly system with the rotary hearth furnace is communicated, and the discharging opening of the rotary hearth furnace direct-reduction system is communicated with the feeding mouth of the dry type magnetic separation system.Application present system processes lateritic nickel ore and can directly enter stove using aqueous lateritic nickel ore green-ball, eliminates the drying flow process of technique front end, investment reduction；Reducing energy consumption, is conducive to obtaining the higher product of nickel grade, effectively increases product quality simultaneously.
Description
Technical field
The present invention relates to the system for processing lateritic nickel ore, further to application of the system in process lateritic nickel ore,
Belong to the process field of lateritic nickel ore.
Background technology
Direct-reduction flow process is dried using material forming (pressure ball or pelletizing) more than rotary hearth furnace direct-reduction technique, into
Pelletizing after type can just be distributed into rotary hearth furnace after needing drying, therefore must be separately provided drying plant and be dried；Additionally, through turning bottom
The reduzate of stove direct-reduction, also needs to discharge outside rotary hearth furnace after supercooling, and by being arranged on rotary hearth furnace cooling section
On water-cooling wall cooled down, this also result in the waste of reduzate heat.
Lateritic nickel ore raw aqueous can reach 30%, with reducing agent, additive mixed-forming after pelletizing contain higher
Moisture, needs increase drying unit to dry pelletizing and can just enter rotary hearth furnace operation in common process.
The Chinese invention patent of Publication No. CN1235268A discloses a kind of for rotary table, especially rotary hearth furnace
Charging and distribution device.The device includes material feed mechanism, and (2,3), material transfer mechanism (304) and material gravity are toppled over
Guide groove (4), the equipment include that the staticizer of the distribution material for difference, the mechanism include the cloth for toppling over guide groove (4)
Leading edge (214), it has profile of substantially curve, and the derivative of the curve is rotary table (10) in table core
And the incremental linear function of the radius of the part between its edge.The equipment cannot process the pelletizing that does not dry, and need in pelletizing
Stage adds stoving process, increased process energy consumption；Directly using the heat entrained by flue gas cannot increase heat loss simultaneously.
The Chinese invention patent of Application No. 201510648755.7 disclose a kind of for rotary hearth furnace in cooling and baking
Dry synchronous method, comprises the following steps that：First, red for rotary hearth furnace ball is equably fallen feed end A2's by the first deflector chute
On lower floor's carrier bar, while the rotary hearth furnace green-ball is equably fallen in the upper strata carrier bar of feed end B1 by the first distributing device
On；Secondly, by adjusting the rotating speed of the upper strata carrier bar and lower floor's carrier bar, it is ensured that the rotation direction of the two is contrary；Subsequently, cold sky
The red ball that gas rises and is placed through on lower floor's carrier bar, lowers the temperature to the red ball, at the same air temperature increase transitions into
Preheated air；Then, the preheated air continues to rise, and the green-ball being then passed through on the upper strata carrier bar is dried to the green-ball, in advance
Heat, while the preheated air temperature declines, is transformed into the hot-air containing certain heat；Finally, the hot-air is extracted, and enters
Falling dust room, then the dirt pocket is entered by the falling dust room, used in proceeding to the air preheating system in rotary hearth furnace by the dirt pocket；
In the method, the red ball of rotary hearth furnace reduction product must be discharged and just can carry out cooling treatment outside rotary hearth furnace, not only need to be separately provided cold
But device, can also cause thermal losses；Additionally, cooling down using air to rotary hearth furnace reduction product, rotary hearth furnace product is easily caused
Oxidation, can reduce the degree of metalization of product, affect product quality.
The Chinese invention patent of Application No. 201510649237.7 discloses a kind of same for cooling, drying in rotary hearth furnace
The high-performance device of step, which includes：Bearing block, clutch shaft bearing, second bearing, upper network chain/carrier bar, lower network chain/carrier bar, air exhauster,
Casing, upper dividing wall, middle dividing wall, lower dividing wall, maintenance door, bellows, striker plate, bracing frame, reductor and motor；Should
The two ends of upper link plate are respectively mounted and connect the clutch shaft bearing, and the lower carrier bar is respectively mounted and connects the second bearing, and should
Clutch shaft bearing is fixedly arranged on the bearing block with the second bearing is in overlying relation；The casing is placed on the bracing frame,
The maintenance door being opened up on the casing, and the maintenance door being placed on the bracing frame, the bellows are located on the casing, the exhausting seat in the plane
Above the bellows；In the casing internal, on this, dividing wall is located on the upper link plate；In this dividing wall be located at this on network chain/
Between carrier bar and the lower carrier bar；The lower dividing wall is located at the lower section of the lower carrier bar；In the method, rotary hearth furnace reduction product must be discharged
Cooling treatment can be carried out just outside rotary hearth furnace, not only need to be separately provided cooling device, can also cause thermal losses；Additionally, right
Rotary hearth furnace reduction product is cooled down using air, is easily caused the oxidation of rotary hearth furnace product, can be reduced the degree of metalization of product, is affected
Product quality.
To sum up, in current rotary hearth furnace process, the drying of green-ball and the cooling of reduzate are respectively adopted different equipment
Processed with technique, taken up an area face greatly, technological process is long, and efficiency of utilization is low, this not only construction cost increase can also be caused energy
The problems such as consumption index is higher, production cost is higher, it would be highly desirable to improve.
Content of the invention
An object of the present invention is to provide a kind of system for processing lateritic nickel ore；
The second object of the present invention is to be applied to process lateritic nickel ore by described system.
The above-mentioned purpose of the present invention is achieved through the following technical solutions：
Present invention firstly provides a kind of system for processing lateritic nickel ore, including：Pelletizing formation system, rotary hearth furnace are directly also
Original system and dry type magnetic separation system；Wherein, the discharging opening of pelletizing formation system and rotary hearth furnace are reduced directly the feeding mouth phase of system
Logical, the discharging opening of rotary hearth furnace direct-reduction system is communicated with the feeding mouth of dry type magnetic separation system；
The rotary hearth furnace direct-reduction system includes that distribution device is dried and preheating, rotary hearth furnace are preheated and are reduced directly, turn
Bottom stove cooling and oxidation, rotary hearth furnace discharging, its structure include annular body of heater and rotatable ring-shaped furnace bottom, and the annular body of heater is by interior
All furnace walls, periphery furnace wall and annular furnace roof composition, inner circumferential furnace wall are coaxially disposed with periphery furnace wall, the inside and outside side point of annular furnace roof
The top of inner circumferential furnace wall and periphery furnace wall is not connected to, annular furnace is formed, described ring-shaped furnace bottom is correspondingly arranged at the annular furnace
The lower section of thorax；Cloth area, preheating zone, middle warm area, high-temperature region and cooling zone are circumferentially disposed with the annular furnace, and
Cooling zone and cloth area are adjacent, are separated with the barricade of radial direction, at this between cloth area and preheating zone, between high-temperature region and cooling zone
Leaving between the lower end of barricade and ring-shaped furnace bottom can be at least through the interval of one layer of material；In the preheating zone, middle warm area and height
Equipped with burner on the internal and external circumferential furnace wall of warm area, on the furnace bottom between cooling zone and cloth area, drawing mechanism is provided with；Wherein, exist
The fan-shaped guipure distributing device that horizontally set is made up of multilayer sector net conveyor on the cloth area and cooling zone；Described cold
But area is provided with gas blowing device near the internal and external circumferential furnace wall of annular furnace bottom；Above corresponding to fan-shaped guipure distributing device
Rotary hearth furnace furnace roof be provided with exhaust apparatus；Furnace roof side above the fan-shaped guipure distributing device is provided with feeder channel.
Used as a kind of preferred structure, described fan-shaped guipure distributing device is by multilayer spaced fan-shaped net transmission up and down
Band composition, adjacent fan-shaped net conveyor alternate the segment distance that staggers as last layer sector net conveyor in circumferencial direction
Blanking channel of the end to next layer of fan-shaped net conveyor head end blanking, in the corresponding following fan-shaped net of each blanking channel
The head end of conveyer belt is provided with striker plate；The fan-shaped net conveyor of the superiors is located at the lower section of feeder channel, undermost fan-shaped net
The end of conveyer belt forms blanking channel with adjacent barricade, positioned at the top in cloth area.
Preferably, per two-layer, the distance between sector net conveyor center is 80-600mm；If two guipure distances are less than
80mm, then need to arrange quantity excessively, increase cost；If distance is more than 600mm, pelletizing reaches lower net band from a guipure
Difference in height is excessive, easily causes the fragmentation of pelletizing, while the time of staying is too short on guipure, it is impossible to ensure drying effect.
Preferably, the size of the blanking channel of undermost fan-shaped net conveyor is 100-200mm；It is a discovery of the invention that under
Material channel width can make pelletizing smoothly drop down onto lower net band for 100mm～200mm.If undersized, material falling speed is excessively slow,
Affect cloth effect；If oversized, material falls to concentrating, and pelletizing can be caused to pile up.
Preferably, barricade is 60-150mm with the spacing distance of rotary furnace bottom.The barricade distance at distribution device two ends turns
Bottom stove furnace bottom is highly 60～150mm, for opening cooling zone, cloth area and other zone isolations, it is ensured that blowing gas are to height
Warm reduzate does not interfere with other zone atmospheres while cooling, and the gas after exchanging heat can up drying and preheating green-ball；
Additionally, also not interfering with the material movement in each region.If barricade is highly excessive apart from furnace bottom, it is impossible to ensure isolation effect；If high
Spend little, motion of the material in stove can be affected.
Each fan-shaped net conveyor includes support shaft, drive sprocket and fan-shaped guipure；Two support shafts distinguish radial rotating
The two ends of fan-shaped net conveyor are supported on, one drive sprocket, the sector are respectively housed at its two ends in each support shaft
Guipure is connected as closed annular band by several fan-shaped monomer carrier bars, is hinged by chain link between adjacent monomer carrier bar,
The two ends of the chain link are provided with the hole that engages with described drive sprocket, and the chain link on the both sides of the fan-shaped guipure is centered around two transmissions
Fan-shaped net conveyor is constituted on sprocket wheel；Fan-shaped guipure on each layer sector net conveyor in the running, by power set driving by
Head end terminad is moved.
Preferably, the fan-shaped net conveyor is in horizontally disposed.
Preferably, distance of the fan-shaped guipure distributing device along the two ends of the radial direction of rotary hearth furnace away from sidewall of the furnace body is respectively
100-200mm；The distance can ensure that net belt type distributing device energy up-down vibration, but will not collide the side wall of rotary hearth furnace, and may be used also
Pelletizing is covered with rotary furnace bottom.
Preferably, described feeder channel is identical with the width of fan-shaped guipure along the width of annular body of heater radial direction.
Preferably, undermost fan-shaped net conveyor is 40-80mm apart from the height of ring-shaped furnace bottom.If this is apart from excessive,
Pelletizing can be more easy to fragmentation during falling；If apart from too small, bottom is heated excessively, affects the life-span of device.
Described monomer carrier bar is radially divided into multistage, and dividing plate and annular body of heater by the dividing plate of arc in annular body of heater
For isocentric circular arc, the height of dividing plate is higher than thickness of the material on fan-shaped guipure；
Preferably, the height of dividing plate is 60-80mm；The height of dividing plate is 60～80mm, and at least than being fed pelletizing thickness
High about 20mm, thus can cause the feed pelletizing of epimere guipure all to feed hypomere guipure, and until whole clothes are to rotary hearth furnace
Furnace bottom.
Described fan-shaped guipure by wire netting or is uniformly distributed the metallic plate of pore and makes；The preferably circular gas of the pore
Hole, it is furthermore preferred that a diameter of 4-7mm of the circular pore.Hole diameter is too small, and gas is little with the contact surface of green pellets, shadow
Its drying effect is rung, hole diameter is excessive, and green pellets can leak down or be stuck in pore.
As a kind of preferred structure of the present invention, the gas blowing device blowing gas of internal and external circumferential furnace wall are arranged on
Highly higher than the thickness of the material for entering cooling zone；Described drawing mechanism is spiral discharging device.
Described system further is applied to process lateritic nickel ore by the present invention, including：
(1) after being well mixed lateritic nickel ore, reducing agent and additive aqueous green pellets is made in pelletizing formation system；
(2) aqueous green pellets by rotary hearth furnace be reduced directly system feeder channel equably cloth on fan-shaped guipure simultaneously
Operated with guipure forward；Wherein, the gas of gas blowing device injection carries out heat with the high temperature reduction product for entering into cooling zone
Exchange and produce preheating gas, up preheating gas carry out heating to the green pellets in guipure makes pelletizing obtain drying preheating；
The pelletizing of preheating reaches rotary hearth furnace cloth area by the blanking channel of orlop sector net conveyor, sequentially passes through rotary hearth furnace preheating
There is reduction reaction in area, middle warm area, high-temperature region, obtain the reduzate of high temperature；The reduzate of high temperature enters cooling zone and gas
The gas contact of body blowing device injection, the reduzate of high temperature is cooled down, while the part iron in product is aoxidized, cold
But the reduzate after is discharged out of the furnace by drawing mechanism；The preheating gas of heat exchange are carried out in barricade with high temperature reduction product
The aqueous green-ball for being used for drying in distributing device in distribution device is gone upward under effect；
(3) reduzate that discharges out of the furnace enters dry type magnetic separation system and obtains high-grade nickel iron metal granules and non magnetic
Slag；
Wherein, the moisture in aqueous green pellets described in step (1) is controlled to≤20 weight %；
Gas of the oxidizing gas of gas blowing device injection for 15～40 volume % of oxygen content in step (2).Injection
Oxidizing gas of the gas for 15～40 volume % of oxygen content, blowing gas can also while the cooling of Accelerating reduction product
There is oxidation reaction with the metal in reduzate, as metallic iron is more easy to oxidized, therefore a part of metallic iron than metallic nickel
Become oxide, and metallic nickel is unaffected, so as to improve the nickel grade of reduzate.If oxygen content is relatively low in gas, nothing
Method plays the effect of preferable oxidized metal iron within the short time contacted with high temperature reduction product；If oxygen content is higher, meeting again
Cause the oxidation of nickel, so as to affect product quality.
Lateritic nickel ore, reducing agent and additive are made aqueous green-ball, aqueous lateritic nickel ore life according to a certain percentage
Ball enters fan-shaped net conveyor by the feeder channel of distribution device, carries out hot friendship in decline process with up preheating gas
Change, dry and preheated pellets；The green-ball of drying reaches rotary hearth furnace cloth by the blanking channel of undermost fan-shaped net conveyor
Area, sequentially passes through rotary hearth furnace preheating zone, middle warm area, high-temperature region, and pelletizing will not occur obvious Decrepitation Phenomena in the process, with
Shi Fasheng reduction reactions, generate the reduzate of high temperature；Oxygen after high temperature reduction product reaches cooling zone, with gas blowing device
The property changed gas carries out heat exchange, plays the purpose of cooling reduzate, while gas is preheated.Part metals iron in the process
Generation oxidation reaction, so as to improve the nickel grade of reduzate, the reduzate after cooling and oxidation is arranged by drawing mechanism
Come out of the stove outer；Continue to dry during gas after heat exchange is up, the green-ball in preheating distribution device, subsequently produce with drying course
Raw vapor discharges rotary hearth furnace by exhaust apparatus.The barricade at distribution device two ends be used for by cooling zone, cloth area and other
Zone isolation is opened, it is ensured that blowing gas do not interfere with other zone atmospheres to high temperature reduction product while cooling, and after exchanging heat
Gas can up drying and preheating green pellets；Additionally, also not interfering with the material movement in each region.
Lateritic nickel ore is processed using present system and there can be at least one of following advantages：
(1) stove can directly be entered using aqueous lateritic nickel ore green-ball, eliminates the drying flow process of technique front end, be saved and throw
Money, while reducing energy consumption.
(2) be conducive to obtaining the higher reduzate of nickel grade, improve product quality.
Description of the drawings
Fig. 1 shows that the rotary hearth furnace of one embodiment of the invention processes the flow process of the system and method for lateritic nickel ore and illustrates
Figure.
Fig. 2 shows the schematic flow sheet of rotary hearth furnace Direct Reduction according to an embodiment of the invention.
Fig. 3 shows rotary hearth furnace overlooking the structure diagram according to an embodiment of the invention.
Fig. 4 shows mesh belt structure top view according to embodiments of the present invention.
Fig. 5 shows guipure cross-sectional view according to embodiments of the present invention.
Fig. 6 shows that middle sector guipure distributing device is in rotary hearth furnace circumferencial direction structural representation according to embodiments of the present invention.
Description of reference numerals：
1st, cloth area；2nd, preheating zone；3rd, middle warm area；4th, high-temperature region；5th, cooling zone；6th, fan-shaped net conveyor；61st, fan-shaped net
Band；7th, dividing plate；8th, pore；9th, blanking channel；10th, support shaft；11st, drawing mechanism；12nd, feeder channel；13rd, striker plate；14th, pass
Movable sprocket；15th, chain link；16th, barricade；17th, exhaust apparatus；18th, gas blowing device.
Specific embodiment
With reference to shown in Fig. 1, the invention provides a kind of system for processing lateritic nickel ore, including：Pelletizing formation system S100,
Rotary hearth furnace direct-reduction system S200, dry type magnetic separation system S300；Wherein, the discharging opening and rotary hearth furnace of pelletizing formation system S100
The feeding mouth of direct-reduction system S200 is communicated, and rotary hearth furnace is reduced directly the discharging opening of system S200 and dry type magnetic separation system S300
Feeding mouth communicate；
As shown in figures 3 to 6, rotary hearth furnace direct-reduction system S200 includes that distribution device is dried and preheated S201, turns
Bottom stove preheating and direct-reduction S202, rotary hearth furnace cooling and oxidation S203, rotary hearth furnace discharging S204, its structure include annular body of heater
With rotatable ring-shaped furnace bottom, the annular body of heater is made up of inner circumferential furnace wall, periphery furnace wall and annular furnace roof, inner circumferential furnace wall and periphery
Furnace wall is coaxially disposed, and the inside and outside side of annular furnace roof is connected to the top of inner circumferential furnace wall and periphery furnace wall, forms annular furnace
Thorax, described ring-shaped furnace bottom are correspondingly arranged at the lower section of the annular furnace；Cloth is circumferentially disposed with the annular furnace
Area 1, preheating zone 2, middle warm area 3, high-temperature region 4 and cooling zone 5, and cooling zone 5 and cloth area 1 are adjacent, cloth area 1 and preheating zone 2
Between, separated with the barricade 16 of radial direction between high-temperature region 4 and cooling zone 5, stay between the lower end of the barricade 16 and ring-shaped furnace bottom
Having can be at least through the interval of one layer of material；It is equipped with the internal and external circumferential furnace wall of the preheating zone 2, middle warm area 3 and high-temperature region 4
Burner, is provided with drawing mechanism 11 on the furnace bottom between cooling zone 5 and cloth area 1, wherein, the cloth area 1 and cooling zone 5 it
The fan-shaped guipure distributing device that upper horizontally set is made up of multilayer sector net conveyor 6；In described cooling zone 5 near ring-shaped furnace bottom
The internal and external circumferential furnace wall at place is provided with gas blowing device 18；Rotary hearth furnace furnace roof above corresponding to fan-shaped guipure distributing device sets
There is exhaust apparatus 17；Furnace roof side above the fan-shaped guipure distributing device is provided with feeder channel 12.
By multilayer, spaced fan-shaped net conveyor 6 is constituted described fan-shaped guipure distributing device up and down, adjacent sector
Net conveyor 6 alternates the segment distance that staggers in circumferencial direction and fans to next layer as 6 end of last layer sector net conveyor
The blanking channel 9 of 6 head end blanking of shape net conveyor, in the head of the corresponding following fan-shaped net conveyor 6 of each blanking channel 9
End is provided with striker plate 13；The fan-shaped net conveyor 6 of the superiors is located at the lower section of feeder channel 12, undermost fan-shaped net conveyor
6 end forms blanking channel 9 with adjacent barricade 16, positioned at the top in cloth area.
Each fan-shaped net conveyor 6 includes support shaft 10, drive sprocket 14 and fan-shaped guipure 61；10 points of two support shafts
Other radial rotating is supported on the two ends of fan-shaped net conveyor 6, respectively passes equipped with one at its two ends in each support shaft 10
Movable sprocket 14, the fan-shaped guipure 61 are connected as closed annular band by several fan-shaped monomer carrier bars, adjacent monomer carrier bar it
Between be hinged by chain link 15, be provided with the hole that engages with described drive sprocket 14 at the two ends of the chain link 15, the fan-shaped guipure 61
The chain link 15 on both sides be centered around on two drive sprockets 14 and constitute fan-shaped net conveyor 6；Fan on each layer sector net conveyor 6
Shape guipure 61 in the running, is driven by power set and is moved by head end terminad.
Described monomer carrier bar is radially divided into multistage, and dividing plate 7 and annular furnace by the dividing plate 7 of arc in annular body of heater
Body is isocentric circular arc, and the height of dividing plate 7 is higher than thickness of the material on fan-shaped guipure 61.
Described fan-shaped guipure 61 by wire netting or is uniformly distributed the metallic plate of pore 8 and makes；The pore 8 is preferably to be justified
Shape pore.
The height of gas blowing device 18 of internal and external circumferential furnace wall is arranged on higher than the material bed thickness for entering cooling zone；
Described drawing mechanism 11 is spiral discharging device.
The distance between one specific embodiment of the present invention, 6 center of two-layer sector net conveyor are 80～600mm, if
Two guipures then need to arrange quantity excessively, increase cost apart from too short；If apart from long, under pelletizing is reached from a guipure
The difference in height of layer guipure is excessive, easily causes the fragmentation of pelletizing, while the time of staying is too short on guipure, it is impossible to ensure to dry effect
Really.
One specific embodiment of the present invention, the blanking channel 9 of orlop sector net conveyor 6 are located in cloth area, away from
Highly it is 40～80mm from rotary furnace bottom；If this apart from excessive, pelletizing can be more easy to fragmentation during falling；If apart from mistake
Little, bottom is heated excessively, affects the life-span of device.
One specific embodiment of the present invention, fan-shaped guipure 61 are divided into 2～5 sections by dividing plate 7, and radian is justified with rotary hearth furnace
Radian in circumferential direction is consistent, and cross section is parallel with rotary hearth furnace radial direction；61 bottom average mark of guipure is furnished with circular pore 8,
So that the blowing gas of preheating are contacted with lateritic nickel ore green pellets, which is dried.
One specific embodiment of the present invention, a diameter of 4～7mm of circular pore 8, hole diameter be too small, gas and life
The contact surface of pelletizing is little, affects its drying effect, and hole diameter is excessive, and green pellets can leak down or be stuck in pore.
One specific embodiment of the present invention, 6 end of fan-shaped net conveyor is provided with blanking channel 9 and striker plate 13, blanking
9 width of passage is 100～200mm, makes pelletizing drop down onto lower net band.If undersized, material falling speed is excessively slow, affects cloth
Material effect；If oversized, material falls to concentrating, and pelletizing can be caused to pile up.
One specific embodiment of the present invention, the barricade 16 at distribution device two ends apart from rotary furnace bottom highly be 60～
150mm, for opening cooling zone 5, cloth area 1 and other zone isolations, it is ensured that blowing gas are cooled down to high temperature reduction product
Do not interfere with other zone atmospheres simultaneously, and the gas after exchanging heat can up drying and preheating green pellets；Additionally, also not interfering with
The material movement in each region.
One specific embodiment of the present invention, gas blowing device 18 are arranged on the cooling zone below fan-shaped guipure distributing device
5, and on the bed of material of reduzate, reduzate is blown.
One specific embodiment of the present invention, exhaust apparatus 17 are arranged on the rotary hearth furnace top above fan-shaped guipure distributing device
Wall, and near the side of guipure.
One specific embodiment of the present invention, drawing mechanism 11 are arranged in the middle of cooling zone 5 and cloth area 1.
The solution of the present invention is explained below in conjunction with embodiment.It will be understood to those of skill in the art that following
Embodiment is merely to illustrate the present invention, and should not be taken as limiting the scope of the invention.
In the examples below, unless otherwise specified, " % " expression " weight % ".
Embodiment 1
The lateritic nickel ore raw ore of nickel grade 0.89%, Iron grade 29.24% is allocated into after a certain amount of reducing agent, additive
It is well mixed, aqueous green-ball is made by pelletizing system S100, the pelletizing is distributed into by distribution device and turns bottom by water content 10%
Stove is reduced directly system S200.The distribution device is guipure distributing device, by 6 groups of about 4 layers spaced fan-shaped net conveyors
Into. each fan-shaped net conveyor 6 includes support shaft 10, drive sprocket 14 and fan-shaped guipure 61；Two support shafts 10 distinguish footpath
To the two ends for being rotatably supported in fan-shaped guipure 61, a drive sprocket is respectively housed at its two ends in each support shaft 10
14, the fan-shaped guipure 61 is connected as closed annular band by several fan-shaped monomer carrier bars, passes through between adjacent monomer carrier bar
Chain link 15 is hinged, and is provided with the hole that engages with described drive sprocket 14 at the two ends of the chain link 15, the both sides of the fan-shaped guipure 61
Chain link 15 be centered around on two drive sprockets 14 and constitute fan-shaped net conveyor 6；Fan-shaped guipure on each layer sector net conveyor 6
61 in the running, is driven by power set and is moved by head end terminad；
6 centre distance of each layer sector net conveyor is 80mm, and undermost fan-shaped net conveyor 6 is apart from rotary furnace bottom height
Spend for 40mm, the blanking channel 9 of orlop sector net conveyor 6 is located on rotary hearth furnace cloth area；Distributing device is along rotary hearth furnace footpath
It is 100mm to the distance of the two ends away from rotary hearth furnace side wall in direction；
Fan-shaped guipure 61 is divided into 3 sections by four road dividing plates 7, and every section of radian and the radian one on rotary hearth furnace circumferencial direction
Cause, cross section are parallel with rotary hearth furnace radial direction, and 7 height of dividing plate is 60mm, and 61 bottom even of fan-shaped guipure is distributed with a diameter of
The circular pore 8 of 4mm.There are width 100mm blanking channels 96 end of fan-shaped net conveyor.
Barricade 16 is highly 60mm apart from rotary furnace bottom；
Pelletizing enters rotary hearth furnace cloth area 1 by the blanking channel 9 of orlop sector net conveyor 6, sequentially passes through preheating
Area 2, middle warm area 3, high-temperature region 4, pelletizing are 22min in this stage residence time, and high-temperature region temperature is 1450 DEG C, the high temperature of generation
Reduzate reaches cooling zone 5；
Cooling zone 5 is provided with gas blowing device 18, and its blowing gas oxygen content is 15 volumes %.Blowing gas and high temperature
Reduzate is contacted, and while cooling reduzate aoxidizes part iron therein.Gas after preheating goes upward to cloth
Aqueous green-ball is carried out drying preheating by device, and the vapor that subsequent and drying course is produced is discharged from exhaust apparatus 17 together.Reduction
Product discharges rotary hearth furnace by drawing mechanism 11.
The reduzate for discharging out of the furnace enters dry type magnetic separation system S300 and obtains high-grade nickel iron metal granules and non-magnetic
Property slag；The nickel grade of wherein nickel iron metal granules is up to 7.25%.
Embodiment 2
The lateritic nickel ore raw ore of nickel grade 2.47%, Iron grade 12.95% is allocated into after a certain amount of reducing agent, additive
It is well mixed, aqueous green-ball is made by pelletizing system S100, the pelletizing is distributed into by distribution device and turns bottom by water content 15%
Stove is reduced directly system S200.The distribution device is guipure distributing device, by 6 groups of about 5 layers spaced fan-shaped net conveyors
Into. each fan-shaped net conveyor 6 includes support shaft 10, drive sprocket 14 and fan-shaped guipure 61；Two support shafts 10 distinguish footpath
To the two ends for being rotatably supported in fan-shaped net conveyor 6, a driving-chain is respectively housed at its two ends in each support shaft 10
Wheel 14, the fan-shaped guipure 61 is connected as closed annular band by several fan-shaped monomer carrier bars, leads between adjacent monomer carrier bar
Cross chain link 15 to be hinged, the hole that engages with described drive sprocket 14 is provided with the two ends of the chain link 15, the two of the fan-shaped guipure 61
The chain link 15 on side is centered around on two drive sprockets 14 and constitutes fan-shaped net conveyor 6；Fan-shaped net on each layer sector net conveyor 6
Band 61 in the running, is driven by power set and is moved by head end terminad.
6 centre distance of each layer sector net conveyor is 300mm, and orlop sector net conveyor 6 is apart from rotary furnace bottom height
Spend for 60mm, the blanking channel 9 of orlop sector net conveyor 6 is located on rotary hearth furnace cloth area.Distributing device is along rotary hearth furnace footpath
It is 150mm to the distance of the two ends away from rotary hearth furnace side wall in direction.
Fan-shaped guipure 61 is divided into 4 sections by five road dividing plates 7, and per section consistent, horizontal with the radian on rotary hearth furnace circumferencial direction
Section is parallel with rotary hearth furnace radial direction, divider height 70mm, and 61 bottom even of fan-shaped guipure is distributed with the circle of a diameter of 5mm
Pore 8.There are width 150mm blanking channels 96 end of fan-shaped net conveyor.
Barricade 16 is highly 110mm apart from rotary furnace bottom.
Pelletizing enters rotary hearth furnace cloth by the blanking channel 9 of fan-shaped guipure distributing device the most lower floor's sector net conveyor 6
Area 1, sequentially passes through preheating zone 2, middle warm area 3, high-temperature region 4, and pelletizing is 33min in this stage residence time, and high-temperature region temperature is
1400℃.The high temperature reduction product of generation reaches cooling zone 5.
Cooling zone 5 is provided with gas blowing device 18, and its blowing gas oxygen content is 30 volumes %.Blowing gas and high temperature
Reduzate is contacted, and while cooling reduzate aoxidizes part iron therein.Gas after preheating goes upward to cloth
Aqueous green-ball is carried out drying preheating by device, and the vapor that subsequent and drying course is produced is discharged from exhaust apparatus 17 together.
Reduzate discharges rotary hearth furnace by drawing mechanism 11.
The reduzate for discharging out of the furnace enters dry type magnetic separation system S300 and obtains high-grade nickel iron metal granules and non-magnetic
Property slag；The nickel grade of wherein nickel iron metal granules is up to 11.27%.
Embodiment 3
The lateritic nickel ore raw ore of nickel grade 1.35%, Iron grade 17.62% is allocated into after a certain amount of reducing agent, additive
It is well mixed, aqueous green-ball is made by pelletizing system S100, the pelletizing is distributed into by distribution device and turns bottom by water content 20%
Stove is reduced directly system S200.The distribution device is guipure distributing device, by 6 groups of about 6 layers spaced fan-shaped net conveyors
Into. each fan-shaped net conveyor 6 includes support shaft 10, drive sprocket 14 and fan-shaped guipure 61；Two support shafts 10 distinguish footpath
To the two ends for being rotatably supported in fan-shaped net conveyor 6, a driving-chain is respectively housed at its two ends in each support shaft 10
Wheel 14, the fan-shaped guipure 61 is connected as closed annular band by several fan-shaped monomer carrier bars, leads between adjacent monomer carrier bar
Cross chain link 15 to be hinged, the hole that engages with described drive sprocket 14 is provided with the two ends of the chain link 15, the two of the fan-shaped guipure 61
The chain link 15 on side is centered around on two drive sprockets 14 and constitutes fan-shaped net conveyor 6；Fan-shaped net on each layer sector net conveyor 6
Band 61 in the running, is driven by power set and is moved by head end terminad.
Each layer 6 centre distance of sector net conveyor is 600mm, and undermost guipure apart from rotary furnace bottom is highly
80mm, the blanking channel 9 of undermost fan-shaped net conveyor 6 are located on rotary hearth furnace cloth area 1.Net belt type distributing device edge turns bottom
Distance of the two ends of stove radial direction away from rotary hearth furnace side wall is 200mm.
Fan-shaped guipure 61 is divided into 2 sections by three road dividing plates 7, and every section of radian and the radian one on rotary hearth furnace circumferencial direction
Cause, cross section are parallel with rotary hearth furnace radial direction, and divider height 80mm, 61 bottom even of fan-shaped guipure are distributed with a diameter of 5mm
Circular pore 8.There are width 200mm blanking channels 96 end of fan-shaped net conveyor.
Barricade 16 is highly 150mm apart from rotary furnace bottom.
Pelletizing enters rotary hearth furnace cloth area 1 by the blanking channel 9 of fan-shaped net conveyor orlop sector net conveyor 6,
Preheating zone 2, middle warm area 3, high-temperature region 4 is sequentially passed through, pelletizing is 16min in this stage residence time, and high-temperature region temperature is 1480
℃.The high temperature reduction product of generation reaches cooling zone 5.
Cooling zone 5 is provided with gas blowing device 18, and its blowing gas oxygen content is 40 volumes %.Blowing gas and high temperature
Reduzate is contacted, and while cooling reduzate aoxidizes part iron therein.Gas after preheating goes upward to sector
Aqueous green-ball is carried out drying preheating by guipure distributing device, and the vapor that subsequent and drying course is produced is together from exhaust apparatus 17
Middle discharge.Reduzate discharges rotary hearth furnace by drawing mechanism 11.
The reduzate for discharging out of the furnace enters dry type magnetic separation system S300 and obtains high-grade nickel iron metal granules and non-magnetic
Property slag；The nickel grade of wherein nickel iron metal granules is up to 9.12%.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.For example guipure is changed into chute etc..
Claims (9)
1. a kind of process lateritic nickel ore system, it is characterised in that include：Rotary hearth furnace direct-reduction system (S200), institute
Stating rotary hearth furnace direct-reduction system (S200) includes annular body of heater and rotatable ring-shaped furnace bottom；Annular furnace in the rotary hearth furnace
Cloth area (1), preheating zone (2), middle warm area (3), high-temperature region (4) and cooling zone (5) are circumferentially disposed with thorax, and are cooled down
Area (5) and cloth area (1) are adjacent, are used between cloth area (1) and preheating zone (2), between high-temperature region (4) and cooling zone (5) respectively
The barricade (16) of radial direction separates, and leaving between the lower end of the barricade (16) and ring-shaped furnace bottom can be at least through one layer of material
Interval；Wherein, the sector that horizontally set is made up of multilayer sector net conveyor (6) on the cloth area (1) and cooling zone (5)
Guipure distributing device；Gas blowing device is provided with described cooling zone (5) on the internal and external circumferential furnace wall of annular furnace bottom
(18)；Rotary hearth furnace furnace roof above corresponding to fan-shaped guipure distributing device is provided with exhaust apparatus (17)；In the fan-shaped guipure cloth
Furnace roof side above device is provided with feeder channel (12).
2. system according to claim 1, it is characterised in that：Described fan-shaped guipure distributing device is by multilayer between the upper and lower every setting
Fan-shaped net conveyor (6) composition that puts, adjacent fan-shaped net conveyor (6) alternate the segment distance work that staggers in circumferencial direction
For blanking channel (9) from last layer sector net conveyor (6) end to next layer of fan-shaped net conveyor (6) head end blanking, per
The head end of the corresponding following fan-shaped net conveyor (6) of one blanking channel (9) is provided with striker plate (13)；The fan-shaped net of the superiors
Conveyer belt is located at the lower section of feeder channel (12), and the end of undermost fan-shaped net conveyor (6) is formed with adjacent barricade (16)
Blanking channel (9), positioned at the top of cloth area (1).
3. system according to claim 2, it is characterised in that：Each fan-shaped net conveyor (6) include support shaft (10), pass
Movable sprocket (14) and fan-shaped guipure (61)；Radial rotating is supported on the two of fan-shaped net conveyor (6) respectively for two support shafts (10)
End, is respectively equipped with a drive sprocket (14) in each support shaft (10) at its two ends, and fan-shaped guipure (61) are by some
Individual fan-shaped monomer carrier bar is connected as closed annular band, is hinged by chain link (15), in the chain link between adjacent monomer carrier bar
(15) two ends are provided with the hole that engages with described drive sprocket (14), and the chain link (15) on the both sides of fan-shaped guipure (61) is surrounded
In the fan-shaped net conveyor (6) of the upper composition of two drive sprockets (14)；Fan-shaped guipure (61) on each layer sector net conveyor (6) exists
During operating, driven by power set and moved by head end terminad.
4. system according to claim 3, it is characterised in that：Described monomer carrier bar is in annular body of heater radially by arc
Dividing plate (7) be divided into multistage, and dividing plate (7) and annular body of heater are isocentric circular arc, and the height of dividing plate (7) is higher than material in sector
Thickness on guipure (61).
5. system according to claim 3, it is characterised in that：Described fan-shaped guipure (61) by wire netting or is uniformly distributed
The metallic plate of pore (8) is made.
6. system according to claim 1, it is characterised in that：It is arranged on the gas blowing device (18) of internal and external circumferential furnace wall
Height higher than enter cooling zone material thickness.
7. the method that the system any one of a kind of utilization claim 1-6 processes lateritic nickel ore, it is characterised in that bag
Include：
The feeder channel (12) that system (S200) is reduced directly by rotary hearth furnace, will be uniform for the aqueous green pellets for passing through pretreatment
Ground cloth is upper in fan-shaped net conveyor (6) and is operated with guipure forward；Wherein, gas blowing device (18) is blown gas and entrance
High temperature reduction product to cooling zone (5) carries out heat exchange generation preheating gas, and up preheating gas are in fan-shaped guipure
(61) green pellets in carries out heating, drying is preheated pelletizing；The pelletizing of preheating is by orlop sector net conveyor (6)
Blanking channel (9) reach rotary hearth furnace cloth area (1), sequentially pass through rotary hearth furnace preheating zone (2), middle warm area (3), high-temperature region (4)
Generation reduction reaction, obtains the reduzate of high temperature；The reduzate of high temperature enters cooling zone (5) and gas blowing device (18)
The gas contact of injection, the reduzate of high temperature is cooled down, while the part iron in product is aoxidized, the reduction after cooling
Product is discharged out of the furnace by drawing mechanism (11)；With the preheating gas that high temperature reduction product carries out heat exchange barricade (16) work
The aqueous green-ball for being used for drying in distributing device in distribution device is gone upward to under；
The reduzate that discharges out of the furnace enters dry type magnetic separation system (S300) and obtains high-grade nickel iron metal granules and non magnetic
Slag.
8. in accordance with the method for claim 7, it is characterised in that：Moisture in the aqueous green pellets is≤20 weights
Amount %.
9. in accordance with the method for claim 7, it is characterised in that：The oxidisability gas that gas blowing device (18) are blown
Gas of the body for 15～40 volume % of oxygen content.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610972281.6A CN106498183A (en) | 2016-10-28 | 2016-10-28 | Process the system of lateritic nickel ore and its application in lateritic nickel ore is processed |
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| CN201610972281.6A CN106498183A (en) | 2016-10-28 | 2016-10-28 | Process the system of lateritic nickel ore and its application in lateritic nickel ore is processed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019007064A (en) * | 2017-06-28 | 2019-01-17 | 住友金属鉱山株式会社 | Refining method of oxide ore |
| JP2019019389A (en) * | 2017-07-19 | 2019-02-07 | 住友金属鉱山株式会社 | Method for smelting oxide ore |
| JP2019077905A (en) * | 2017-10-20 | 2019-05-23 | 住友金属鉱山株式会社 | Smelting method of oxide ore |
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2016
- 2016-10-28 CN CN201610972281.6A patent/CN106498183A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019007064A (en) * | 2017-06-28 | 2019-01-17 | 住友金属鉱山株式会社 | Refining method of oxide ore |
| JP2019019389A (en) * | 2017-07-19 | 2019-02-07 | 住友金属鉱山株式会社 | Method for smelting oxide ore |
| JP7052239B2 (en) | 2017-07-19 | 2022-04-12 | 住友金属鉱山株式会社 | Oxidized ore smelting method |
| JP2019077905A (en) * | 2017-10-20 | 2019-05-23 | 住友金属鉱山株式会社 | Smelting method of oxide ore |
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