CN107619924B - The system and method that a kind of microwave substep strengthens dry lateritic nickel ore - Google Patents
The system and method that a kind of microwave substep strengthens dry lateritic nickel ore Download PDFInfo
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- CN107619924B CN107619924B CN201710900892.4A CN201710900892A CN107619924B CN 107619924 B CN107619924 B CN 107619924B CN 201710900892 A CN201710900892 A CN 201710900892A CN 107619924 B CN107619924 B CN 107619924B
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Abstract
The present invention provides the system and method that a kind of microwave substep strengthens dry lateritic nickel ore, the method that microwave substep strengthens dry lateritic nickel ore allows the lateritic nickel ore of processing to be dried to pass sequentially through the first microwave drier in system, powder mixing arrangement is made in extruding and the second microwave drier implementation substep is dry, increase a broken mixing in two drying steps with addition of metallurgical dust technique, mixing is conducive to microwave evenly drying, improves the effective use efficiency and drying effect of energy；In addition, being passed through anti-oxidation gas into microwave dryer can take vapor a large amount of in furnace out of in time, reduces the vapour pressure in micro-wave oven and the evaporation of vapor is carried out towards forward direction；And do not need to consume additional water resource in entire treatment process, environmental pollution will not be caused；Therefore, the system and method that microwave of the invention substep strengthens dry lateritic nickel ore solve in the prior art the problems such as complex process, production efficiency are low, energy consumption is high, pollution is big, drying effect is poor.
Description
Technical field
The present invention relates to chemical metallurgy mineral technical field of drying, and in particular to a kind of dry laterite nickel of microwave substep reinforcing
The system and method for mine.
Background technique
Due to stainless steel has excellent corrosion resistance and by favor, military, industry or it is civilian in suffer from extensively
Application.Indispensable important source material of the ferronickel as stainless steel smelting, as the continuous growth of world's stainless steel demand pushes away
Ferronickel demand has been moved greatly to improve.But compared with huge nickel demand, China belongs to the country of nickel resources scarcity.
As the exhaustion of nickel sulfide ore resource promotes the utilization of laterite, the ratio of the annual import Philippine laterite of China is also substantially
It improves.Laterite aqueous (free water, crystallization water) is more, and nickel distribution disperse, crystal grain are tiny, it is difficult to be enriched with, and smelt difficult, processing
Energy consumption is high, and laterite must be dried in pyrometallurgical smelting.
The excessively high progress for directly affecting follow-up sintering technique of laterite water content, leading to that production efficiency is low, energy consumption is high etc. asks
Topic is to perplex a series of general character problems of enterprises of producing stainless steel.Current drying process is to pass through traditional heating side using rotary kiln
Formula is thermally dried.Cardinal principle is the environment with coal circumference, with the radiation of heat or passes through the side of hot-air convection
Formula heats the surface of object, and the inside of object is then conducted heat to by heat transfer, so that moisture gradually evaporates.
It is this that there are operating processes is complicated, high energy consumption and efficiency is low, the time is long by table to inner heat exchange pattern heating means, heating not
Uniformly, rupture that pollution is big, working condition is poor, material easily crusts influences rotary kiln service life, dry the disadvantages of being not thorough, serious to hinder
The further promotion of Business Economic Benefit is hindered.
Therefore a kind of new easily operated, energy consumption and at low cost, high-efficient lateritic nickel ore drying process are needed.
Summary of the invention
Aiming at the above shortcomings existing in the prior art, the purpose of the present invention is to provide a kind of microwave substeps to strengthen drying
The system of lateritic nickel ore is used to by way of microwave heating carry out lateritic nickel ore the drying process of multiple step format, to reach
Low energy consumption, high efficiency, cleaning, free of contamination drying process effect, and easy to use and operation, it is dry to advantageously reduce lateritic nickel ore
Dry processing cost can be dried complicated operating process, energy consumption and at high cost, effect to solve lateritic nickel ore in the prior art
Rate is low, pollution is big, dry the problems such as being not thorough.
To achieve the above object, present invention employs the following technical solutions:
The system that a kind of microwave substep strengthens dry lateritic nickel ore, including the first microwave drier, the second microwave drying
Powder mixing arrangement is made in device and extruding positioned there between；
First microwave drier includes whole in vertically arranged the first cylindric dryness storehouse, the first dryness storehouse
It is inside laid with microwave generator, is equipped with first annular conveyer belt in the inside bottom surface of the first dryness storehouse, and the first dryness storehouse
Top is equipped with first material feed inlet and first row port, is equipped with first material discharge at the sidewall bottom position of the first dryness storehouse
Mouth and the first air inlet；
It includes integrally making powder mixing bunker in vertically arranged cylindrical shape that powder mixing arrangement is made in the extruding, makes powder mixing bunker
Inside bottom surface on be equipped with the second endless belt conveyer, and make in powder mixing bunker on the transmission zone face of the second endless belt conveyer
Side is horizontally arranged with milling roller, and the transverse extent of milling roller covers the conveyer belt of its second endless belt conveyer position of place
Face width, and matched with the transmission zone face of the second endless belt conveyer position where it and roll face so that transmitting zone face and being used as, it makes
It is adjacent at top position where being located at milling roller on the top of powder mixing bunker on front side of the transmission of the second endless belt conveyer position to set
It is equipped with second material feed inlet and powder feed inlet, the sidewall bottom for making powder mixing bunker is located at the second annular transmission where milling roller
Second material discharge gate is equipped at transmission rearward position with position；
Second microwave drier includes whole in vertically arranged the second cylindric dryness storehouse, the second dryness storehouse
It is inside laid with microwave generator, is equipped with third endless belt conveyer in the inside bottom surface of the second dryness storehouse, and the second dryness storehouse
Top is equipped with third material feed inlet and second exhaust port, is equipped with third material discharge at the sidewall bottom position of the second dryness storehouse
Mouth and the second air inlet；
The first material feed inlet of first microwave drier is as lateritic nickel ore feed inlet, the first microwave drying dress
The first material discharge gate set is connected with the second material feed inlet for making powder mixing arrangement is squeezed, and powder mixing arrangement is made in extruding
Second material discharge gate is connected with the third material feed inlet of the second microwave drier, the third of the second microwave drier
Discharge port of the material discharge gate as lateritic nickel ore material after drying；First air inlet of the first microwave drier and second micro-
Second air inlet of wave drying device is respectively communicated to the air taking port of an anti-oxidation gas storage tank；The first annular transmission
Band, the second endless belt conveyer, third endless belt conveyer and milling roller pass through the drive of drive assembly structure Yu a driving motor
Moving axis is connected, and passes through the driving rotation of drive assembly structure by the driving motor.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, preferably, the first annular transmission
Band, the second endless belt conveyer and third endless belt conveyer transmission zone face be disposed as low skewed of inner ring side height, outer rim side
State.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, preferably, first microwave drying
It is equipped at the first material discharge gate position of device and laterally prolongs from first material discharge gate to the first dryness storehouse inner hub location
The the first discharge block stretched, and the transmission zone face of the lower end surface of the first discharge block and first annular conveyer belt in the first dryness storehouse
It fits, enables and elapsed with the mobile material of first annular conveyer belt operation by the first discharge block in the first dryness storehouse
To first material discharge gate；
It is described squeeze to make be equipped at the second material discharge gate position of powder mixing arrangement from second material discharge gate to making powder
The second discharge block that mixing bunker inner hub location is laterally extended, and the lower end surface of the second discharge block and make in powder mixing bunker
The transmission zone face of second endless belt conveyer fits, so that making in powder mixing bunker with the object that the operation of the second endless belt conveyer is mobile
Material can be elapsed by the second discharge block to second material discharge gate；
It is equipped at the third material discharge gate position of second microwave drier from third material discharge gate to second
The third discharge block that dryness storehouse inner hub location is laterally extended, and in the lower end surface of third discharge block and the second dryness storehouse
The transmission zone face of third endless belt conveyer fits, so that with the object that the operation of third endless belt conveyer is mobile in the second dryness storehouse
Material can be elapsed by the first discharge block to third material discharge gate.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, micro- as a kind of optional scheme, described first
Wave drying device, extruding make powder mixing arrangement and the second microwave drier, and from top to bottom successively vertical array is arranged；
The drive assembly structure includes the vertically arranged vertical drive rod being connected with the drive shaft of driving motor, institute
It states vertical drive rod to penetrate to the first dryness storehouse with being total to axial line, make in powder mixing bunker and the second dryness storehouse, and is threaded through respectively
On the central rotating shaft of first annular conveyer belt, the second endless belt conveyer and third endless belt conveyer, to drive first annular transmission
Band, the second endless belt conveyer and the rotation of third endless belt conveyer；Drive assembly structure further include setting make in powder mixing bunker with
Milling roller it is coaxially connected roll drive shaft, drive shaft and the vertical drive rod of rolling passes through bevel gear right-angle drive structure biography
Dynamic connection.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, as the optional scheme of another kind, described first
Powder mixing arrangement and the second microwave drier successively transversely arranged arrangement are made in microwave drier, extruding；
The drive assembly structure includes the lateral drive rod being laterally arranged being connected with driving motor drive shaft, with
And it respectively penetrates to the first dryness storehouse, make the first vertical drive rod in powder mixing bunker and the second dryness storehouse, the second vertical transmission
Bar and the vertical drive rod of third, the first vertical drive rod, the second vertical drive rod and the vertical drive rod of third are worn respectively
On the central rotating shaft of first annular conveyer belt, the second endless belt conveyer and third endless belt conveyer, to drive first annular biography
Send band, the second endless belt conveyer and the rotation of third endless belt conveyer, and the first vertical drive rod, the second vertical drive rod and third
Vertical drive rod passes through first bevel gear right-angle drive structure respectively and the lateral drive rod is sequentially connected；Drive assembly structure
Further include be arranged in make in powder mixing bunker with milling roller it is coaxially connected roll drive shaft, the drive shaft and second vertical of rolling
Drive rod is connected by second bevel gear right-angle drive structure driven.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, preferably, first microwave drying
The first row port of device and the second exhaust port of the second microwave drier are respectively communicated to the mixed of a dehumidification drying device
Close gas air inlet, and the dry exhaust mouth of dehumidification drying device be respectively communicated to the first microwave drier the first air inlet and
Second air inlet of the second microwave drier.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, preferably, first microwave drying
The third endless belt conveyer in first annular conveyer belt and the second microwave drier in device is ceramics, quartz glass or rubber
Glue material matter；It is hard metal material that the second endless belt conveyer in powder mixing arrangement is made in the extruding.
Above-mentioned microwave substep is strengthened in the system of dry lateritic nickel ore, preferably, first microwave drying
In device, the top that the first dryness storehouse is arranged in first material feed inlet corresponds at the position above first material discharge gate,
And first is located in dryness storehouse immediately below first material feed inlet and is fixedly installed the first sloping baffle, first sloping baffle by
Up to lowerly towards the linear velocity direction inclination of first annular conveyer belt operation rotation at its following position directly；Second microwave
In drying device, the top that the second dryness storehouse is arranged in third material feed inlet corresponds to the position above third material discharge gate
Place, and be located at immediately below third material feed inlet in the second dryness storehouse and be fixedly installed the second sloping baffle, the second inclination gear
Plate from top to bottom is tilted towards the linear velocity direction of first annular conveyer belt operation rotation at its following position directly.
Correspondingly, the present invention also provides the systems for strengthening dry lateritic nickel ore using above-mentioned microwave substep to implement laterite nickel
The method that mine is dried；For this purpose, the present invention provides the following technical solutions:
A kind of method that microwave substep strengthens dry lateritic nickel ore strengthens dry lateritic nickel ore using above-mentioned microwave substep
System implement be dried, include the following steps:
1) start each microwave generator operation in the first microwave drier and the second microwave drier, and start and drive
Dynamic motor, so that driving motor drives first annular conveyer belt, the second endless belt conveyer, third annular by drive assembly structure
Conveyer belt and milling roller operation rotation, and open anti-oxidation gas storage tank and pass through the first air inlet and the second air inlet respectively
Anti-oxidation gas is continually fed into the first dryness storehouse and the second dryness storehouse；
2) lateritic nickel ore of processing to be dried is fed through the of the first microwave drier by first material feed inlet
After one dryness storehouse, lateritic nickel ore is mobile with first annular conveyer belt in the first dryness storehouse, and under anti-oxidation gaseous environment into
The micro-wave drying of row first time, the first dryness storehouse is discharged from first row port with anti-oxidation gas in vapor, until laterite
Nickel minerals is sent by first annular conveyer belt to the first material discharge gate discharge of the first microwave drier, through second material feed inlet
Powder mixing arrangement is made into extruding；
3) it is passed through containing metal iron particle powder in the powder feed inlet that powder mixing arrangement is made in extruding to lateritic nickel ore, so that into
Enter to squeeze the lateritic nickel ore made in powder mixing bunker for making powder mixing arrangement to pass together with containing metal iron particle powder with the second annular
Send band mobile, rolled through milling roller and be mixed into granular lateritic nickel ore mixed material, then by the second endless belt conveyer send to
The second material discharge gate discharge for making powder mixing arrangement is squeezed, enters the second microwave drier through third material feed inlet；
4) lateritic nickel ore mixed material is mobile with third endless belt conveyer in the second dryness storehouse, and in anti-oxidation Ring
Secondary micro-wave drying is carried out under border, the second dryness storehouse is discharged from second exhaust port with anti-oxidation gas in vapor, directly
The third material discharge gate to the second microwave drier is sent to be discharged simultaneously by third endless belt conveyer to lateritic nickel ore mixed material
It is collected, completes the drying process to lateritic nickel ore.
Above-mentioned microwave substep is strengthened in the method for dry lateritic nickel ore, preferably, in the step 1), starting
After each microwave generator operation in first microwave drier and the second microwave drier, in the first dryness storehouse of control and the
Microwave power in two dryness storehouses is 200 ~ 1000kW；And starting driving motor drives first annular conveyer belt, the second annular to pass
After sending band, third endless belt conveyer and milling roller operation rotation, first annular conveyer belt, the second endless belt conveyer, the are controlled
The revolving speed of three endless belt conveyers is 0.02-0.2r/min.
Compared with the prior art, the invention has the following beneficial effects:
1, microwave of the invention substep strengthens the system and method for dry lateritic nickel ore, utilizes microwave drying prereduction laterite
Nickel minerals raw mineral materials.This clean energy resource drying and prereducing lateritic nickel ore of microwave has uniform drying, and the thermal efficiency is high, cleans without dirt
Contaminate, start and stop heating it is very fast, energy dissipation is few.Production efficiency can be significantly improved, energy consumption is reduced, improves production item
Part, the incomparable advantage of traditional heating modes such as increase economic efficiency.
2, microwave of the invention substep is strengthened in the system and method for dry lateritic nickel ore, due to object in microwave drying process
Matter more evenly drying effect is better, so implementation substep is dry, increases a broken mixing in two drying steps with addition of smelting
Bronze dirt technique, mixing are conducive to microwave evenly drying, are conducive to auxiliary with addition of metallurgical dust and inhale wave raising drying efficiency, improve
The effective use efficiency and drying effect of energy.It can be by water a large amount of in furnace in addition, being passed through gas into microwave dryer
Steam is taken out of in time, reduces the vapour pressure in micro-wave oven and the evaporation of vapor is carried out towards forward direction.
3, microwave substep of the invention is strengthened in the system and method for dry lateritic nickel ore, can be to generating in drying process
Large quantity of moisture recycling and reusing, further save water resources consumption.
4, microwave of the invention substep strengthens the system and method for dry lateritic nickel ore, for the dry laterite of high-efficiency cleaning low consumption
Nickel minerals provides a kind of new process, solves in the prior art that complex process, production efficiency are low, energy consumption is high, pollution is big, dry effect
The problems such as fruit is poor.
Detailed description of the invention
Fig. 1 is a kind of embodiment structure schematic diagram for the system that microwave substep of the present invention strengthens dry lateritic nickel ore.
Fig. 2 is the another embodiment structural schematic diagram for the system that microwave substep of the present invention strengthens dry lateritic nickel ore.
Fig. 3 is the XRD object phasor of preparation gained primary drying laterite sample in the embodiment of the present invention one.
Fig. 4 is the XRD object phasor of preparation gained redrying laterite sample in the embodiment of the present invention one.
Specific embodiment
It is directed to lateritic nickel ore in the prior art and is dried complicated operating process, energy consumption and at high cost, low efficiency, drying
The problems such as being not thorough, the present invention are dried lateritic nickel ore by the way of microwave heating.Micro-wave drying is different
In traditional drying mode, heat transfer direction is identical as moisture diffusion direction.Compared with traditional drying mode, micro-wave drying
Big, energy conservation, high production efficiency, uniform drying, clean manufacturing, easily realization automation control and raising product matter with rate of drying
The advantages that amount.Therefore, micro-wave drying can be used in high volume dry lateritic nickel ore, and current enterprises of producing stainless steel is overcome to exist
A series of dry problems faced of lateritic nickel ore.Also, in order to preferably guarantee to be dried effect, improves drying and be not thorough
The problem of, present invention employs the design schemes of multiple step format micro-wave drying, and targetedly devise microwave substep and strengthen
The system and corresponding processing method of dry lateritic nickel ore.
The overall system architecture that microwave substep of the invention strengthens dry lateritic nickel ore is as depicted in figs. 1 and 2, including first
Powder mixing arrangement 20 is made in microwave drier 10, the second microwave drier 30 and extruding positioned there between.Wherein,
One microwave drier 10 includes whole the first dryness storehouse 11 in vertically arranged cylindrical shape, is laid in the first dryness storehouse 11
Microwave generator 40, is equipped with first annular conveyer belt 12 in the inside bottom surface of the first dryness storehouse 11, and the first dryness storehouse 11
Top is equipped with first material feed inlet 13 and first row port 14, is equipped with the first object at the sidewall bottom position of the first dryness storehouse 11
Expect discharge gate 15 and the first air inlet 16.It includes that entirety is mixed in vertically arranged cylindric powder of making that powder mixing arrangement 20 is made in extruding
Storehouse 21 is closed, makes and is equipped with the second endless belt conveyer 22 in the inside bottom surface of powder mixing bunker 21, and makes and is located at the in powder mixing bunker 21
It is horizontally arranged with milling roller 23 above the transmission zone face of second ring conveyer belt, and the transverse extent of milling roller 23 covers its institute
Transmission zone face width in the second endless belt conveyer position, and match with the transmission zone face of the second endless belt conveyer position where it
It closes and rolls face so that transmitting zone face and being used as, make the second endless belt conveyer position where being located at milling roller on the top of powder mixing bunker 21
Transmission on front side of top position at be disposed adjacent second material feed inlet 24 and powder feed inlet 25, make powder mixing bunker 21
Second material discharge gate 26 is equipped with where sidewall bottom is located at milling roller at the transmission rearward position of second endless belt conveyer position.
Second microwave drier 30 includes whole the second dryness storehouse 31 in vertically arranged cylindrical shape, is laid in the second dryness storehouse
Microwave generator 40, is equipped with third endless belt conveyer 32 in the inside bottom surface of the second dryness storehouse 31, and the second dryness storehouse 31
Top is equipped with third material feed inlet 33 and second exhaust port 34, is equipped with third object at the sidewall bottom position of the second dryness storehouse 31
Expect discharge gate 35 and the second air inlet 36.The first material feed inlet 13 of first microwave drier 10 is fed as lateritic nickel ore
Mouthful, the first material discharge gate 15 of the first microwave drier 10 makes the second material feed inlet 24 of powder mixing arrangement 20 with squeezing
It is connected, the third material for squeezing the second material discharge gate 26 and the second microwave drier 30 of making powder mixing arrangement 20 is fed
Mouth 33 is connected, discharging of the third material discharge gate 35 of the second microwave drier 30 as lateritic nickel ore material after drying
Mouthful；First air inlet 16 of the first microwave drier 10 and the second air inlet 36 of the second microwave drier 30 are respectively communicated with
To the air taking port of an anti-oxidation gas storage tank 50；The first annular conveyer belt 12, the second endless belt conveyer 22, third ring
Shape conveyer belt 32 and milling roller 23 are connected by drive assembly structure with the drive shaft of a driving motor 60, by the driving
Motor 60 passes through the driving rotation of drive assembly structure.
It should be noted that being the transmission fortune relative to conveyer belt on front side of the transmission, on rear side of transmission in the present invention
For line direction；On front side of the transmission of certain designated position, refer in conveyer belt operational process, is reached along conveyer belt traffic direction
The position that can pass through before the designated position；On front side of the transmission of certain designated position, then refer in conveyer belt operational process, along biography
It send and reaches the position that can pass through after the designated position with traffic direction.
In the system that microwave substep of the present invention strengthens dry lateritic nickel ore, the first microwave drier, extruding are made powder and are mixed
Attach together set, the second microwave drier three can using vertical array arrangement or transversely arranged arrangement distribution form.If such as
Shown in Fig. 1, the first microwave drier 10, extruding make powder mixing arrangement 20 and the second microwave drier 30 using from top to bottom
The successively mode of vertical array arrangement, then drive assembly structure can be designed as including the vertically arranged drive with driving motor 60
The vertical drive rod 61 that moving axis is connected, the vertical drive rod 61 is penetrated to the first dryness storehouse 11 with being total to axial line, to make powder mixed
It closes in storehouse 21 and the second dryness storehouse 31, and is threaded through first annular conveyer belt 12, the second endless belt conveyer 22 and third ring respectively
On the central rotating shaft of shape conveyer belt 32, to drive first annular conveyer belt 12, the second endless belt conveyer 22 and the transmission of third annular
Band 32 rotates；Meanwhile drive assembly structure further include be arranged in make in powder mixing bunker 21 with milling roller 23 is coaxially connected rolls
Drive shaft 23a, this rolls drive shaft 23a and is connect with vertical drive rod 61 by bevel gear right-angle drive structure driven, to stone roller
Drive shaft is pressed to form driving.And if as shown in Fig. 2, the first microwave drier 10, extruding make powder mixing arrangement 20 and second
The mode of the successively transversely arranged arrangement of microwave drier 30, then drive assembly structure can be designed as include laterally be arranged with
The lateral drive rod 62 that the drive shaft of driving motor 60 is connected, and respectively penetrate to the first dryness storehouse 11, make powder mixing bunker
21 and the second the first vertical drive rod 63, the second vertical drive rod 64 and vertical drive rod 65 of third in dryness storehouse 31, it is described
First vertical drive rod 63, the second vertical drive rod 64 and the vertical drive rod 65 of third are threaded through first annular conveyer belt respectively
12, on the central rotating shaft of the second endless belt conveyer 22 and third endless belt conveyer 32, to drive first annular conveyer belt 12, second
Endless belt conveyer 22 and third endless belt conveyer 32 rotate, and the first vertical drive rod 63, the second vertical drive rod 64 and third
Vertical drive rod 65 is sequentially connected by first bevel gear right-angle drive structure and the lateral drive rod 62 respectively；Equally, it passes
Dynamic assembly structure further include be arranged in make in powder mixing bunker 21 with milling roller 23 it is coaxially connected roll drive shaft, 23a should be rolled
Drive shaft 23a is connect with the second vertical drive rod 64 by second bevel gear right-angle drive structure driven, with to rolling drive shaft
Form driving.Certainly, if the first microwave drier, extruding make powder mixing arrangement and the second microwave drier using Fig. 2 institute
The transversely arranged arrangement shown, since the first material discharge gate of the first microwave drier and extruding make powder mixing arrangement
Between second material feed inlet, squeeze make powder mixing arrangement second material discharge gate and the second microwave drier third object
There is difference in height between material feed inlet, therefore carries out connection connection, and feeding screw energy preferably with feeding screw
Enough rates of feed of control material transfer, to be more advantageous to according to the rate of drying to lateritic nickel ore and correspondingly adjust spiral
The rate of feed of feed appliance.
As preferred design method, as depicted in figs. 1 and 2, strengthen dry lateritic nickel ore in microwave substep of the present invention
First microwave drier 10 of system is squeezed and is made in powder mixing arrangement 20 and the second microwave drier 30, first annular biography
Sending band 12, the second endless belt conveyer 22 to be disposed as with the transmission zone face of third endless belt conveyer 32, inner ring side is high, outer rim side is low
Heeling condition so that material can lean on outer ring side mobile on inclined transmission zone face, so that it is dry first to be conducive to material
11 in dry storehouse, makes powder mixing bunker 21, is moved at respective material discharge gate position in transportational process in the second dryness storehouse 31 and be
It is easy to be discharged.
Alternatively, as another preferred design mode, it can be in the first material discharge gate position of the first microwave drier
The place of setting is equipped with the first discharge block being laterally extended from first material discharge gate to the first dryness storehouse inner hub location, and first
The lower end surface of discharge block and the transmission zone face of first annular conveyer belt in the first dryness storehouse fit, so that in the first dryness storehouse
The interior material mobile with the operation of first annular conveyer belt can be elapsed by the first discharge block to first material discharge gate；It is squeezing
It makes and is equipped at the second material discharge gate position of powder mixing arrangement from second material discharge gate to making powder mixing bunker inside center position
It sets the second discharge block being laterally extended, and the lower end surface of the second discharge block and makes the second endless belt conveyer in powder mixing bunker
Transmission zone face fits, and enables and is making in powder mixing bunker with the mobile material of the second endless belt conveyer operation by the second discharge
Block is elapsed to second material discharge gate；It is equipped at the third material discharge gate position of the second microwave drier from third object
The third discharge block that material discharge gate is laterally extended to the second dryness storehouse inner hub location, and the lower end surface of third discharge block
It fits with the transmission zone face of third endless belt conveyer in the second dryness storehouse, so that being transmitted in the second dryness storehouse with third annular
It can be elapsed by the first discharge block to third material discharge gate with the mobile material of operation；All increase in three warehouses as a result,
Respective discharge stop block structure is added, has further helped material in the first dryness storehouse, makes powder mixing bunker, in the second dryness storehouse
Discharge is passed in transportational process.
In addition, as depicted in figs. 1 and 2, the microwave generator 40 in the first microwave drier 10 can be designed as uniformly
Distribution is arranged on the side wall and top surface of the first dryness storehouse 11, equally, the microwave generator 40 in the second microwave drier 30
It may be designed in and be uniformly set on the side wall and top surface of the second dryness storehouse 31, to guarantee the first microwave drier 10
It is balanced with the microwave field in the second microwave drier 30, guarantee that material is filled in the first microwave drier and the second microwave drying
It can be in thermally equivalent under microwave field in setting.
First annular conveyer belt and the second microwave drier in view of the difference of purposes, in the first microwave drier
In third endless belt conveyer preferably with ceramics, quartz glass or rubber material, because of the first dryness storehouse and the second dryness storehouse
Environment in have microwave field, if metal material can absorb microwave energy and generate heat, not only metal using the conveyer belt of metal material
Conveyer belt is easy temperature distortion damage, also results in the microwave loss of energy；Ceramics, quartz glass or rubber material under microwave field then
It not will cause temperature distortion and microwave loss of energy problem, and can preferably realize material transmission function.And it squeezes and makes powder mixing
The second endless belt conveyer in device rolls then preferably with hard metal material because the second endless belt conveyer needs to be used as
The characteristics such as hard, non-friable, wear-resisting that it is necessary to have matter in face, thus be suitable for using hard metal material, and be not suitable for using ceramics,
Quartz glass or rubber material.
As further Optimal Structure Designing mode, in the first microwave drier of present system, first material
Feed inlet can be set to be corresponded at the position above first material discharge gate at the top of the first dryness storehouse, and the first dryness storehouse
It is interior be located at immediately below first material feed inlet be fixedly installed the first sloping baffle, first sloping baffle from top to bottom direction
The linear velocity direction inclination of first annular conveyer belt operation rotation at its following position directly so that from first material feed inlet into
The material for entering the first dryness storehouse can be transferred to position corresponding to first material discharge gate by the blocking of the first sloping baffle
First annular conveyer belt operate rear；Equally, in the second microwave drier, third material feed inlet be can be set
The top of two dryness storehouses corresponds at the position above third material discharge gate, and is located at third material in the second dryness storehouse and feeds
It is fixedly installed the second sloping baffle immediately below mouthful, second sloping baffle is from top to bottom towards at its following position directly first
The linear velocity direction inclination of endless belt conveyer operation rotation, so that entering the material of the second dryness storehouse from third material feed inlet
The third endless belt conveyer fortune of position corresponding to third material discharge gate can be transferred to by the blocking of the second sloping baffle
Turn rear.It, can be in storehouse with first annular after material can be made to enter the first dryness storehouse/second dryness storehouse since in this way
Conveyer belt/third endless belt conveyer operating is discharged out of my cabin again after a week, so that material is in the first dryness storehouse/second dryness storehouse
There is the enough micro-wave drying time.
The process being dried is implemented using the system that microwave of the present invention substep strengthens dry lateritic nickel ore as shown in figure 3,
Include the following steps:
1) start each microwave generator operation in the first microwave drier and the second microwave drier, and start and drive
Dynamic motor, so that driving motor drives first annular conveyer belt, the second endless belt conveyer, third annular by drive assembly structure
Conveyer belt and milling roller operation rotation, and open anti-oxidation gas storage tank and pass through the first air inlet and the second air inlet respectively
Anti-oxidation gas is continually fed into the first dryness storehouse and the second dryness storehouse.Wherein, the anti-oxidation gas being passed through can choose nitrogen
Gas, argon gas, carbon monoxide, carbon dioxide, hydrogen, methane etc., it is therefore an objective to avoid lateritic nickel ore dry in the first dryness storehouse/second
It is oxidized when in storehouse by heated drying.And start each microwave generator in the first microwave drier and the second microwave drier
After operation, preferably controlling the microwave power in the first dryness storehouse and in the second dryness storehouse is 200 ~ 1000kW；Meanwhile starting driving
It is best after the first annular conveyer belt of motor driven, the second endless belt conveyer, third endless belt conveyer and milling roller operation rotation
Control first annular conveyer belt, the second endless belt conveyer, third endless belt conveyer revolving speed be 0.02-0.2r/min so that red
Native nickel minerals material can stop off field dry 5 in 200 ~ 1000kW microwave power in the first dryness storehouse/second dryness storehouse ~
50min, to guarantee the drying effect to lateritic nickel ore material.
2) lateritic nickel ore of processing to be dried is fed through the of the first microwave drier by first material feed inlet
After one dryness storehouse, lateritic nickel ore is mobile with first annular conveyer belt in the first dryness storehouse, and under anti-oxidation gaseous environment into
The micro-wave drying of row first time, the first dryness storehouse is discharged from first row port with anti-oxidation gas in vapor, until laterite
Nickel minerals is sent by first annular conveyer belt to the first material discharge gate discharge of the first microwave drier, through second material feed inlet
Powder mixing arrangement is made into extruding.
3) it is passed through containing metal iron particle powder in the powder feed inlet that powder mixing arrangement is made in extruding to lateritic nickel ore, so that into
Enter to squeeze the lateritic nickel ore made in powder mixing bunker for making powder mixing arrangement to pass together with containing metal iron particle powder with the second annular
Send band mobile, rolled through milling roller and be mixed into granular lateritic nickel ore mixed material, then by the second endless belt conveyer send to
The second material discharge gate discharge for making powder mixing arrangement is squeezed, enters the second microwave drier through third material feed inlet.It should
The containing metal iron particle powder being added in step can be metallurgical dust, sintering dust, blast furnace gas dust, converter dust, electricity
Furnace dust etc..Containing metal iron particle powder is added during rolling processing to lateritic nickel ore execution, it is therefore an objective to so that rolling
Lateritic nickel ore partial size is refined, and can be mutually mixed with containing metal iron particle powder, thus subsequent
In second of micro-wave drying processing, the lateritic nickel ore particle of small particle is easier to be heated evenly under microwave field, and by
Containing metal iron particle powder assist absorption microwave power, further increases the effective use efficiency and drying effect of microwave energy.
4) lateritic nickel ore mixed material is mobile with third endless belt conveyer in the second dryness storehouse, and in anti-oxidation Ring
Secondary micro-wave drying is carried out under border, the second dryness storehouse is discharged from second exhaust port with anti-oxidation gas in vapor, directly
The third material discharge gate to the second microwave drier is sent to be discharged simultaneously by third endless belt conveyer to lateritic nickel ore mixed material
It is collected, completes the drying process to lateritic nickel ore.
It can see by above-mentioned process, the system that microwave substep of the invention strengthens dry lateritic nickel ore uses micro-
The mode of Wave heating carries out the drying process of multiple step format to lateritic nickel ore.Microwave is as a kind of new cleaning fuel, and microwave is dry
When dry red soil nickel minerals, the electromagnetic field effects that the water isopolarity molecule mainly in laterite is changed by high frequency, warm-up movement aggravation, from
And be the thermal energy of evaporation water by electromagnetic energy, and microwave power is higher, and electromagnetic field intensity is bigger, and it is interior at the same time,
The laterite sample ore of same quality can obtain more electromagnetic energy, so that it is converted to the more thermal energy to dry laterite sample ore,
Accelerate the drying process of laterite.This heating method of microwave macroscopically belongs to internal heating method, and electromagnetic energy directly acts on
It is converted into thermal energy in hydrone, and material inside and outside medium can be made while being heated, does not need heat transfer, and inside lacks heat sink strip
Part causes internal temperature to be higher than external temperature gradient distribution, forms driving steam pressure difference of the internal moisture to surface penetration, adds
The speed migration evaporation rate of moisture.Rate of drying compares the raising that traditional heating can be hundreds times, reaches in a short time equal
Even drying, thermal efficiency height, cleanliness without any pollution, start and stop heating it is very fast, energy dissipation is few, can significantly improve production
Efficiency reduces energy consumption, improves working condition, the incomparable advantage of traditional heating modes such as increase economic efficiency.Simultaneously as
Substance more evenly drying effect is better in microwave drying process, so carrying out substep drying, increases by one in two drying steps
Item is broken to be mixed with addition of metallurgical dust technique, and mixing is conducive to microwave evenly drying, is conducive to auxiliary suction wave with addition of metallurgical dust
Drying efficiency is improved, the effective use efficiency and drying effect of energy are improved.In addition, being passed through oxygen into microwave dryer
Changing gas can take vapor a large amount of in furnace out of in time, and the vapour pressure reduced in micro-wave oven makes the evaporation of vapor towards just
To progress.And do not need to consume additional water resource in entire treatment process, environmental pollution will not be caused.Therefore, of the invention
Microwave substep strengthen dry lateritic nickel ore system and method be the dry lateritic nickel ore of high-efficiency cleaning low consumption provide it is a kind of newly
Technique solves in the prior art the problems such as complex process, production efficiency are low, energy consumption is high, pollution is big, drying effect is poor.
In addition, can see by above-mentioned process, the effect for being passed through anti-oxidation gas is to take vapor out of and be expelled directly out
First dryness storehouse/the second dryness storehouse, to guarantee drying effect.And as energy-saving and emission-reduction from the point of view of, microwave substep strengthen
In the system of dry lateritic nickel ore, as depicted in figs. 1 and 2, the first of the first microwave drier 10 can be further designed
The second exhaust port 37 of exhaust outlet 14 and the second microwave drier 30 is respectively communicated to the mixing of a dehumidification drying device 70
Gas air inlet, and the dry exhaust mouth of dehumidification drying device 70 is respectively communicated to the first air inlet of the first microwave drier 10
16 and second microwave drier 30 the second air inlet 36, using dehumidification drying device to dry from the first dryness storehouse/second
After the steam-laden anti-oxidation gas of storehouse discharge is dried, returns to the first dryness storehouse/second dryness storehouse and continue to use, from
And system discharge amount can be further reduced, save the consuming cost of anti-oxidation gas.
The present invention is described in further detail with specific example with reference to the accompanying drawing.
Embodiment:
The present embodiment use water content (free water, crystallization water) for 42.5% lateritic nickel ore, according to the method for the present invention substep
Microwave drying lateritic nickel ore, the specific steps are as follows:
1) start each microwave generator operation in the first microwave drier and the second microwave drier, and start and drive
Dynamic motor, so that driving motor drives first annular conveyer belt, the second endless belt conveyer, third annular by drive assembly structure
Conveyer belt and milling roller operation rotation, and open anti-oxidation gas storage tank and pass through the first air inlet and the second air inlet respectively
Anti-oxidation gas is continually fed into the first dryness storehouse and the second dryness storehouse.In the present embodiment, control micro- in the first dryness storehouse
Wave power is 200kW, and the microwave power in the second dryness storehouse is 300kW；Control first annular conveyer belt, the second annular transmission
Band, third endless belt conveyer revolving speed be 0.2r/min so that lateritic nickel ore material can the first dryness storehouse 200kW it is micro-
Wave power stops dry 5min off field, and the 300kW microwave power in the second dryness storehouse stops dry 5min off field, dry to guarantee
Dry effect.
2) lateritic nickel ore of processing to be dried is fed through the of the first microwave drier by first material feed inlet
After one dryness storehouse, lateritic nickel ore is mobile with first annular conveyer belt in the first dryness storehouse, and under anti-oxidation gaseous environment into
The micro-wave drying of row first time, the first dryness storehouse is discharged from first row port with anti-oxidation gas in vapor, until laterite
Nickel minerals is sent by first annular conveyer belt to the first material discharge gate discharge of the first microwave drier, through second material feed inlet
Powder mixing arrangement is made into extruding.During the present embodiment, take out what part was discharged after the first microwave drier is dry
Lateritic nickel ore detects XRD object phase, and gained XRD object phase result is as shown in Figure 3.
3) it is passed through containing metal iron particle powder in the powder feed inlet that powder mixing arrangement is made in extruding to lateritic nickel ore, so that into
Enter to squeeze the lateritic nickel ore made in powder mixing bunker for making powder mixing arrangement to pass together with containing metal iron particle powder with the second annular
Send band mobile, rolled through milling roller and be mixed into granular lateritic nickel ore mixed material, then by the second endless belt conveyer send to
The second material discharge gate discharge for making powder mixing arrangement is squeezed, enters the second microwave drier through third material feed inlet.
4) lateritic nickel ore mixed material is mobile with third endless belt conveyer in the second dryness storehouse, and in anti-oxidation Ring
Secondary micro-wave drying is carried out under border, the second dryness storehouse is discharged from second exhaust port with anti-oxidation gas in vapor, directly
The third material discharge gate to the second microwave drier is sent to be discharged simultaneously by third endless belt conveyer to lateritic nickel ore mixed material
It is collected, completes the drying process to lateritic nickel ore.XRD object phase, gained XRD are detected to the lateritic nickel ore for completing to be dried
Object phase result is as shown in Figure 4.
Comparison diagram 3 and Fig. 4 can be seen that the lateritic nickel ore crystallization water whole quilt during redrying of the method for the present invention
Smoothly removing.
In addition, also verifying proves through a large number of experiments, the microwave function in the first dryness storehouse of control and in the second dryness storehouse
Rate is 200 ~ 1000kW, and the revolving speed of the first annular conveyer belt of control control, the second endless belt conveyer, third endless belt conveyer is
0.02-0.2r/min can obtain preferable lateritic nickel ore drying effect.
In conclusion microwave substep of the invention strengthens the system and method for dry lateritic nickel ore, pass through microwave heating
Mode carries out the drying process of multiple step format to lateritic nickel ore, has reached low energy consumption, efficient drying process effect well, and
Easy to use and operation, advantageously reduces lateritic nickel ore drying process cost, provides for the dry lateritic nickel ore of high-efficiency cleaning low consumption
A kind of new process, can to solve lateritic nickel ore in the prior art be dried complicated operating process, energy consumption and it is at high cost,
Low efficiency, dry the problems such as being not thorough.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. the system that a kind of microwave substep strengthens dry lateritic nickel ore, which is characterized in that including the first microwave drier, second
Powder mixing arrangement is made in microwave drier and extruding positioned there between；
First microwave drier includes whole the first dryness storehouse in vertically arranged cylindrical shape, cloth in the first dryness storehouse
Equipped with microwave generator, first annular conveyer belt, and the top of the first dryness storehouse are equipped in the inside bottom surface of the first dryness storehouse
Be equipped with equipped with first material feed inlet and first row port, at the sidewall bottom position of the first dryness storehouse first material discharge gate and
First air inlet；
It includes integrally making powder mixing bunker in vertically arranged cylindrical shape that powder mixing arrangement is made in the extruding, makes the interior of powder mixing bunker
It is equipped with the second endless belt conveyer on the bottom surface of side, and makes horizontal above the transmission zone face of the second endless belt conveyer in powder mixing bunker
To being provided with milling roller, and the transverse extent of milling roller cover it where the second endless belt conveyer position transmission zone face it is wide
Degree, and matched with the transmission zone face of the second endless belt conveyer position where it and roll face so that transmitting zone face and being used as, it is mixed to make powder
It closes and has been disposed adjacent at the top position where being located at milling roller on the top in storehouse on front side of the transmission of the second endless belt conveyer position
Second material feed inlet and powder feed inlet, the sidewall bottom for making powder mixing bunker are located at the second endless belt conveyer position where milling roller
Second material discharge gate is equipped at the transmission rearward position set；
Second microwave drier includes whole the second dryness storehouse in vertically arranged cylindrical shape, cloth in the second dryness storehouse
Equipped with microwave generator, third endless belt conveyer, and the top of the second dryness storehouse are equipped in the inside bottom surface of the second dryness storehouse
Be equipped with equipped with third material feed inlet and second exhaust port, at the sidewall bottom position of the second dryness storehouse third material discharge gate and
Second air inlet；
The first material feed inlet of first microwave drier as lateritic nickel ore feed inlet, the first microwave drier
First material discharge gate is connected with the second material feed inlet for making powder mixing arrangement is squeezed, and extruding makes the second of powder mixing arrangement
Material discharge gate is connected with the third material feed inlet of the second microwave drier, the third material of the second microwave drier
Discharge port of the discharge gate as lateritic nickel ore material after drying；The first air inlet and the second microwave of first microwave drier are dry
Second air inlet of dry device is respectively communicated to the air taking port of an anti-oxidation gas storage tank；The first annular conveyer belt,
Second endless belt conveyer, third endless belt conveyer and milling roller pass through the drive shaft of drive assembly structure Yu a driving motor
It is connected, the driving rotation of drive assembly structure is passed through by the driving motor.
2. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that first ring
It is low that the transmission zone face of shape conveyer belt, the second endless belt conveyer and third endless belt conveyer is disposed as inner ring side height, outer rim side
Heeling condition.
3. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that described first is micro-
It is equipped at the first material discharge gate position of wave drying device from first material discharge gate to the first dryness storehouse inner hub location
The first discharge block being laterally extended, and the biography of the lower end surface of the first discharge block and first annular conveyer belt in the first dryness storehouse
It send zone face to fit, enables and kept off with the mobile material of first annular conveyer belt operation by the first discharge in the first dryness storehouse
Block is elapsed to first material discharge gate；
The extruding is made to be equipped at the second material discharge gate position of powder mixing arrangement from second material discharge gate to powder is made and be mixed
The second discharge block that storehouse inner hub location is laterally extended, and the lower end surface of the second discharge block and make second in powder mixing bunker
The transmission zone face of endless belt conveyer fits, and enables and is making in powder mixing bunker with the material that the operation of the second endless belt conveyer is mobile
It is enough to be elapsed by the second discharge block to second material discharge gate；
It is equipped at the third material discharge gate position of second microwave drier dry from third material discharge gate to second
The third discharge block that storehouse inner hub location is laterally extended, and third in the lower end surface of third discharge block and the second dryness storehouse
The transmission zone face of endless belt conveyer fits, and enables in the second dryness storehouse with the material that the operation of third endless belt conveyer is mobile
It is enough to be elapsed by the first discharge block to third material discharge gate.
4. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that described first is micro-
Wave drying device, extruding make powder mixing arrangement and the second microwave drier, and from top to bottom successively vertical array is arranged；
The drive assembly structure includes the vertically arranged vertical drive rod being connected with the drive shaft of driving motor, described perpendicular
It penetrates to the first dryness storehouse with being total to axial line, made in powder mixing bunker and the second dryness storehouse to drive rod, and be threaded through first respectively
On the central rotating shaft of endless belt conveyer, the second endless belt conveyer and third endless belt conveyer, to drive first annular conveyer belt,
Second ring conveyer belt and the rotation of third endless belt conveyer；Drive assembly structure further includes that setting is being made in powder mixing bunker and milling roller
Coaxially connected rolls drive shaft, and drive shaft and the vertical drive rod of rolling is connected by bevel gear right-angle drive structure driven
It connects.
5. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that described first is micro-
Powder mixing arrangement and the second microwave drier successively transversely arranged arrangement are made in wave drying device, extruding；
The drive assembly structure includes the lateral drive rod being laterally arranged being connected with driving motor drive shaft, Yi Jifen
Do not penetrate to the first dryness storehouse, make the first vertical drive rod in powder mixing bunker and the second dryness storehouse, the second vertical drive rod and
The vertical drive rod of third, the first vertical drive rod, the second vertical drive rod and the vertical drive rod of third are threaded through respectively
On the central rotating shaft of one endless belt conveyer, the second endless belt conveyer and third endless belt conveyer, with drive first annular conveyer belt,
Second endless belt conveyer and the rotation of third endless belt conveyer, and the first vertical drive rod, the second vertical drive rod and third are vertical
Drive rod passes through first bevel gear right-angle drive structure respectively and the lateral drive rod is sequentially connected；Drive assembly structure is also wrapped
Include be arranged in make in powder mixing bunker with milling roller it is coaxially connected roll drive shaft, it is described to roll drive shaft and the second vertical transmission
Bar is connected by second bevel gear right-angle drive structure driven.
6. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that described first is micro-
The first row port of wave drying device and the second exhaust port of the second microwave drier are respectively communicated to a removal moisture drying dress
The mixed gas inlet set, and the dry exhaust mouth of dehumidification drying device be respectively communicated to the first of the first microwave drier into
Second air inlet of port and the second microwave drier.
7. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that described first is micro-
The third endless belt conveyer in first annular conveyer belt and the second microwave drier in wave drying device is ceramics, quartzy glass
Glass or rubber material；It is hard metal material that the second endless belt conveyer in powder mixing arrangement is made in the extruding.
8. the system that microwave substep according to claim 1 strengthens dry lateritic nickel ore, which is characterized in that described first is micro-
In wave drying device, the top that the first dryness storehouse is arranged in first material feed inlet corresponds to the position above first material discharge gate
Place is set, and is located at immediately below first material feed inlet in the first dryness storehouse and is fixedly installed the first sloping baffle, first inclination
Baffle from top to bottom is tilted towards the linear velocity direction of first annular conveyer belt operation rotation at its following position directly；Described
In two microwave driers, the top that the second dryness storehouse is arranged in third material feed inlet corresponds to above third material discharge gate
Position at, and the second dryness storehouse in be located at third material feed inlet immediately below be fixedly installed the second sloping baffle, this second
Sloping baffle from top to bottom is tilted towards the linear velocity direction of first annular conveyer belt operation rotation at its following position directly.
9. a kind of method that microwave substep strengthens dry lateritic nickel ore, which is characterized in that use microwave as described in claim 1
The system that substep strengthens dry lateritic nickel ore is implemented to be dried, and includes the following steps:
1) start each microwave generator operation in the first microwave drier and the second microwave drier, and start driving electricity
Machine, so that driving motor drives first annular conveyer belt, the second endless belt conveyer, the transmission of third annular by drive assembly structure
Band and milling roller operation rotation, and open anti-oxidation gas storage tank and pass through the first air inlet and the second air inlet respectively to the
Anti-oxidation gas is continually fed into one dryness storehouse and the second dryness storehouse；
2) by the lateritic nickel ore of processing to be dried by first material feed inlet be fed through the first microwave drier it is first dry
Behind dry storehouse, lateritic nickel ore is mobile with first annular conveyer belt in the first dryness storehouse, and carries out under anti-oxidation gaseous environment the
Primary micro-wave drying, the first dryness storehouse is discharged from first row port with anti-oxidation gas in vapor, until lateritic nickel ore
It is sent by first annular conveyer belt to the first material discharge gate discharge of the first microwave drier, enters through second material feed inlet
Powder mixing arrangement is made in extruding；
3) it is passed through containing metal iron particle powder in the powder feed inlet that powder mixing arrangement is made in extruding to lateritic nickel ore, is squeezed so that entering
Press the lateritic nickel ore made in powder mixing bunker for making powder mixing arrangement together with containing metal iron particle powder with the second endless belt conveyer
It is mobile, it is rolled through milling roller and is mixed into granular lateritic nickel ore mixed material, then sent by the second endless belt conveyer to extruding
The second material discharge gate discharge for making powder mixing arrangement, enters the second microwave drier through third material feed inlet；
4) lateritic nickel ore mixed material is mobile with third endless belt conveyer in the second dryness storehouse, and under anti-oxidation gaseous environment
Secondary micro-wave drying is carried out, the second dryness storehouse is discharged from second exhaust port with anti-oxidation gas in vapor, until red
Native nickel minerals mixed material send the third material discharge gate to the second microwave drier to be discharged and be subject to by third endless belt conveyer
It collects, completes the drying process to lateritic nickel ore.
10. the method that microwave substep according to claim 9 strengthens dry lateritic nickel ore, which is characterized in that the step
1) in, after starting each microwave generator operation in the first microwave drier and the second microwave drier, control first is dry
Microwave power in dry storehouse and in the second dryness storehouse is 200 ~ 1000kW；And the first annular conveyer belt of starting driving motor driving,
After second endless belt conveyer, third endless belt conveyer and milling roller operation rotation, first annular conveyer belt, the second annular are controlled
Conveyer belt, third endless belt conveyer revolving speed be 0.02-0.2r/min.
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| CN201527160U (en) * | 2009-08-05 | 2010-07-14 | 张文华 | Heated-air circulation microwave belt dryer |
| CN102419077A (en) * | 2011-12-20 | 2012-04-18 | 湖南省中晟热能科技有限公司 | Microwave and steam hybrid heating belt type drying kiln |
| CN203203861U (en) * | 2013-03-05 | 2013-09-18 | 南京梅山冶金发展有限公司 | Device for drying iron ore raw ores by using microwaves |
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