CN206828558U - The system for handling copper ashes - Google Patents
The system for handling copper ashes Download PDFInfo
- Publication number
- CN206828558U CN206828558U CN201720560818.8U CN201720560818U CN206828558U CN 206828558 U CN206828558 U CN 206828558U CN 201720560818 U CN201720560818 U CN 201720560818U CN 206828558 U CN206828558 U CN 206828558U
- Authority
- CN
- China
- Prior art keywords
- particle
- copper ashes
- outlet
- entrance
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses the system of processing copper ashes, system includes：Copper ashes pretreatment unit, there is copper ashes entrance and copper ashes particle outlet；Reduction coal pretreatment unit, there is reduction coal entrance and reduction coal particle outlet；Lime stone pretreatment unit, there is lime stone entrance, the outlet of coarseness limestone particle and the outlet of fine granularity limestone particle；Anoxybiotic mixing arrangement, there is copper ashes particle entrance, reduction coal particle entrance, limestone particle entrance and mixed material outlet；Pyrolysis installation, there is mixed material entrance, pyrolysis oil gas vent and pyrolysis material outlet；Reduction apparatus, there is pyrolysis material inlet and reducing material to export；Water quenching sorting unit, there is reducing material entrance, granulated iron outlet and a tailings outlet.The system can utilize the hot copper ashes sensible heat of itself, while reduce the pretreatment of lime stone and the broken process of sequential reduction material, have the advantages that handling process is short, equipment investment is low, energy consumption is low, added value of product is high.
Description
Technical field
The utility model belongs to chemical industry metallurgical field, specifically, the system that the utility model is related to processing copper ashes.
Background technology
In recent years, copper yield in the world's increases rapidly, and the copper yield in China leaps to the first in the world.In China, copper yield
More than 97% is produced by pyrometallurgical smelting, and pyrometallurgical smelting occupies leading position.Copper can the big amount temperature of output during pyrometallurgical smelting
Iron content copper ashes high, heat content is big, molten state copper ashes tapping temperature are 1200-1300 DEG C, copper ashes iron content 30~40wt% it
Between, higher than the grade of current domestic industry ore dressing iron ore.It is also valuable containing lead, zinc etc. in copper ashes because copper mine source is different
Metallic element.Cooling treatment copper ashes wastes a large amount of physical sensible heats, and is largely stored up rich in iron, the copper ashes of copper, not only causes resource
Significant wastage, and it is difficult to store up the land taken, and with the flushing of rainwater, the heavy metal contained in copper ashes can ooze
Enter earth's surface and underground water, certain pollution can be caused to water resource, hinders the sustainable development of cupper smelting.
Under the situation that ferrolite supply is nervous, price is constantly soaring current both at home and abroad, above-mentioned high-temperature fusion is developed
Copper ashes, the valuable metals such as iron therein, zinc are extracted, reduce the carrying capacity of environment of cupper smelting, the efficient synthesis to realizing copper ashes
Using, widen iron ore deposit, promote Copper making industry sustainable health development it is significant.
Therefore, the technology that further developmental research is efficient, low consumption comprehensively utilizes copper smelting slag is needed.
Utility model content
The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality
It is to propose a kind of system for handling copper ashes with a new purpose.The system can effectively utilize the hot copper ashes sensible heat of itself
To reduce energy consumption, while reduce the pretreatment of lime stone and the broken process of sequential reduction material, have handling process it is short,
The advantages that equipment investment is low, energy consumption is low, added value of product is high.
In one side of the present utility model, the utility model proposes a kind of system for handling copper ashes, according to this practicality
New embodiment, the system include：
Copper ashes pretreatment unit, the copper ashes pretreatment unit have copper ashes entrance and copper ashes particle outlet；
Reduction coal pretreatment unit, the reduction coal pretreatment unit have reduction coal entrance and reduction coal particle outlet；
Lime stone pretreatment unit, the lime stone pretreatment unit have lime stone entrance, coarseness limestone particle
Outlet and the outlet of fine granularity limestone particle；
Anoxybiotic mixing arrangement, the anoxybiotic mixing arrangement have copper ashes particle entrance, reduction coal particle entrance, lime stone
Grain entrance and mixed material outlet, the copper ashes particle entrance are connected with the copper ashes particle outlet, and the reduction coal particle enters
Mouthful be connected with the reduction coal particle outlet, the limestone particle entrance exported respectively with the coarseness limestone particle and
The fine granularity limestone particle outlet is connected；
Pyrolysis installation, the pyrolysis installation have mixed material entrance, pyrolysis oil gas vent and pyrolysis material outlet,
The mixed material entrance is connected with mixed material outlet；
Reduction apparatus, the reduction apparatus have pyrolysis material inlet and reducing material outlet, the pyrolysis
Material inlet is connected with the pyrolysis material outlet；
There is reducing material entrance, granulated iron outlet and a tailings to go out for water quenching-sorting unit, the water quenching-sorting unit
Mouthful, the reducing material entrance is connected with reducing material outlet.
According to the system of the processing copper ashes of the utility model embodiment by the way that hot copper ashes is pre-processed, closed
The copper ashes particle of thermophilic degree, appropriate reduction coal particle and different grain size limestone particle are then incorporated, and in the environment of anoxybiotic
Lower mixing, avoid reduction coal and burnt in mixing, while varigrained limestone particle can ensure mixed material through also
After the reason of original place, there is unreacted calcium oxide in reducing material, it is anti-to be advantageous to calcium oxide therein and water during reducing material water quenching
Calcium hydroxide should be generated, heat release expansion ruptures reducing material, and the reducing material of fragmentation directly sorted can obtain part granulated iron；
In pyrolysis installation using the copper ashes particle heat of itself come the reduction coal in pyrolyzed mixture material and can obtain be pyrolyzed oil gas and
In pyrolysis material, wherein pyrolysis material pyrolysis can be used as containing the semicoke reduced obtained by pyrolysis of coal, the semicoke
Material reduces in the reducing agent of sequential reduction process to iron, so as to can obtain granulated iron through follow-up water quenching-sorting process.By
This, on the premise of product index is not influenceed, the system can effectively utilize the hot copper ashes sensible heat of itself to reduce energy consumption,
The pretreatment of lime stone and the broken process of sequential reduction material are reduced simultaneously, with handling process is short, equipment investment is low, energy consumption
Low, the advantages that added value of product is high.
In addition, technology additional as follows can also be had according to the system of the processing copper ashes of the utility model above-described embodiment
Feature：
Optional, the system of above-mentioned processing copper ashes further comprises：Slag sluicing system device, the slag sluicing system device have
Tailings entrance, iron product outlet and the outlet of secondary tailings, a tailings entrance are connected with tailings outlet.
Thus, it can further improve the rate of recovery of iron.
Optional, the copper ashes pretreatment unit includes cooling device, copper ashes breaker and the copper ashes sieve being sequentially connected
Separating device.Thus, it is possible to further improve the rate of recovery of iron.
Optional, the reduction coal pretreatment unit includes the reduction coal breaker being sequentially connected and reduction coal screening dress
Put.Thus, it is possible to further improve the rate of recovery of iron.
Optional, the lime stone pretreatment unit includes the Limestone crushing device being sequentially connected and lime stone screening dress
Put.Thus, it is possible to further improve the rate of recovery of iron.
Optional, the reduction apparatus is regenerative rotary hearth furnace.Thus, be advantageous to improve the reduction effect of pyrolysis material
Rate, and then further improve the rate of recovery of iron.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the system structure diagram according to the processing copper ashes of the utility model one embodiment；
Fig. 2 is the system structure diagram according to the processing copper ashes of the utility model further embodiment；
Fig. 3 is illustrated according to the method flow of the system processing copper ashes of the processing copper ashes of the utility model one embodiment
Figure；
Fig. 4 is illustrated according to the method flow of the system processing copper ashes of the processing copper ashes of the utility model further embodiment
Figure.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limited unless otherwise clear and definite.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In one side of the present utility model, the utility model proposes a kind of system for handling copper ashes, according to this practicality
New embodiment, with reference to figure 1, the system includes：Copper ashes pretreatment unit 100, reduction coal pretreatment unit 200, lime stone
Pretreatment unit 300, anoxybiotic mixing arrangement 400, pyrolysis installation 500, reduction apparatus 600 and water quenching-sorting unit 700.
According to embodiment of the present utility model, copper ashes pretreatment unit 100 has copper ashes entrance 101 and copper ashes particle outlet
102, and suitable for copper ashes is pre-processed, to obtain copper ashes particle.It is pre- according to one embodiment of the present utility model, copper ashes
Processing unit can include cooling device, copper ashes breaker and the copper ashes screening plant being sequentially connected.It should be noted that copper
Slag is from the iron content copper ashes that the temperature obtained by copper smelting by pyrometallurgical process is high, heat content is big (temperature is 1200-1300 DEG C).Specifically,
First copper ashes is supplied and cooled down into cooling device, its temperature is down to 700~900 degrees Celsius, it is both favourable at this temperature
In carrying out follow-up broken, screening process, ensure that mixed material can be without external heat source in follow-up pyrolysis installation
In the case of be pyrolyzed it is abundant；It is then supplied in copper ashes breaker and is crushed, the copper ashes after being crushed；It is finally fed to copper
In slag screening plant, by screening, the copper ashes particle of suitable particle diameter is obtained.Thus, it is remarkably improved the ratio surface of copper ashes particle
Product, and then improve contact area of the copper ashes particle with reduction coal particle, limestone particle in anoxybiotic mixing arrangement.
According to further embodiment of the present utility model, the particle diameter of copper ashes particle is not particularly restricted, art technology
Personnel can be selected according to being actually needed, and according to a specific embodiment of the present utility model, the particle diameter of copper ashes particle can
With not higher than 2mm.Thus, the specific surface area of copper ashes particle is remarkably improved under the particle diameter, and then improves copper ashes particle in anoxybiotic
In mixing arrangement with reduction coal particle, limestone particle contact area.
According to embodiment of the present utility model, reduction coal pretreatment unit 200 has reduction coal entrance 201 and reduction coal
Grain outlet 202, it is suitable to be pre-processed reduction coal, to obtain reducing coal particle.It should be noted that reduction coal can be adopted
With low-order coal, such as can be at least one of bituminous coal, lignite and jet coal.
According to one embodiment of the present utility model, the reduction coal that reduction coal pretreatment unit can include being sequentially connected is broken
Crushing device and reduction coal screening plant.Specifically, reduction coal is first subjected to break process, the reduction coal after being crushed, then
Reduction coal after will be broken carries out screening process, obtains the reduction coal particle of suitable particle diameter.Thus, it is remarkably improved reduction coal
Grain specific surface area, and then improve reduction coal particle in anoxybiotic mixing arrangement with copper ashes particle, the contact surface of limestone particle
Product.
According to further embodiment of the present utility model, the particle diameter for reducing coal particle is not particularly restricted, this area skill
Art personnel can be selected according to being actually needed, and according to a specific embodiment of the present utility model, reduce the grain of coal particle
Footpath can be not higher than 1mm.Inventor is had found, the product of reduction coal can be significantly improved using the reduction coal particle of the particle size range
Matter, and then improve reduction effect of pyrolysis efficiency and pyrolysis product of the mixed material in pyrolysis installation in reduction apparatus
Rate.
According to embodiment of the present utility model, lime stone pretreatment unit 300 has lime stone entrance 301, coarseness stone
Limestone particles outlet 302 and fine granularity limestone particle outlet 303, and suitable for lime stone is pre-processed, it is thick to obtain
Granularity limestone particle and fine granularity limestone particle.
According to one embodiment of the present utility model, the lime stone that lime stone pretreatment unit can include being sequentially connected is broken
Crushing device and lime stone screening plant.Specifically, lime stone first is carried out into break process, the uneven broken rear lime of granularity is obtained
Stone, then broken rear lime stone is sieved, and screens out coarseness limestone particle and fine granularity limestone particle respectively,
And the lime stone of two kinds of granularities mixes obtain limestone particle by a certain percentage.Inventor has found, using varigrained stone
Limestone particles can ensure that mixed material after reduction treatment, also has unreacted calcium oxide, is advantageous to reduce in reducing material
Calcium oxide therein ruptures reducing material with water reaction generation calcium hydroxide, heat release expansion during material water quenching, the reduction of fragmentation
Material directly sorted can obtain part granulated iron, while the limestone particle of different grain size mixing can improve the ventilative of mixed material
Property, improve mixed material pyrolysis and the condition reduced.Thus, the energy consumption of lime stone pretreatment can have both been reduced, reduction can be reduced again
The treatment process of material.
According to further embodiment of the present utility model, the granularity of granular limestone particle and fine granularity limestone particle
It is not particularly restricted, those skilled in the art can be selected according to being actually needed, according to one of the present utility model tool
Body embodiment, the granularity of coarseness limestone particle are not higher than 5mm, preferably 3~5mm, and the granularity of fine granularity limestone particle is not
Higher than 0.1mm.Inventor has been surprisingly found that by many experiments, can ensure that mixed material exists using varigrained limestone particle
After reduction treatment, also have unreacted calcium oxide in reducing material, be advantageous to during reducing material water quenching calcium oxide therein with
Water reaction generation calcium hydroxide, heat release expansion rupture reducing material, and the reducing material of fragmentation directly sorted can obtain part
Granulated iron.The limestone particle of different grain size mixing simultaneously can improve the gas permeability of mixed material, improve mixed material pyrolysis and go back
Former condition.Thus, the energy consumption of lime stone pretreatment can have both been reduced, the treatment process of reducing material can be reduced again.
According to another embodiment of the present utility model, the quality of coarseness limestone particle and fine granularity limestone particle
Than being not particularly restricted, those skilled in the art can be selected according to being actually needed, according to one of the present utility model
Specific embodiment, the mass ratio of coarseness limestone particle and fine granularity limestone particle can be (0.4~0.8)：1.Invention
People has found, when granular limestone amount of allocating is too high, not only influences reduction effect, also results in the wasting of resources, when coarseness lime
Stone particle amount of allocating hour, it is impossible to realize that metallized pellet water quenching from the technique effect ruptured, increases production process energy consumption.By
This, the reduction effect of material can be improved using the mixed proportion while energy consumption is reduced.
According to embodiment of the present utility model, anoxybiotic mixing arrangement 400 has copper ashes particle entrance 401, reduction coal particle
Entrance 402, limestone particle entrance 403 and mixed material outlet 404, copper ashes particle entrance 401 and the phase of copper ashes particle outlet 102
Even, reduction coal particle entrance 402 is connected with reduction coal particle outlet 202, limestone particle entrance 403 and coarseness lime stone
Grain outlet 302 is connected with fine granularity limestone particle outlet 303, and is suitable to copper ashes particle, reduction coal particle, coarseness lime
Stone particle and fine granularity limestone particle are mixed under anoxic condition, to obtain mixed material.Specifically, will suitable temperature
The copper ashes particle and reduction coal particle, limestone particle of degree are delivered to anoxybiotic mixing arrangement and mixed according to a certain percentage, mix
Uniformly after obtain mixed material, mixing when need to be in anoxic condition under, avoid reduction coal mixing when occur burning and
Cause the loss of reduction coal.
According to one embodiment of the present utility model, the mixing ratio of copper ashes particle, reduction coal particle and limestone particle is simultaneously
It is not particularly limited, those skilled in the art can be selected according to being actually needed, specific according to one of the present utility model
Embodiment, the mass ratio of copper ashes particle, reduction coal particle and limestone particle can be 100：(30~50)：(10~15).Hair
A person of good sense has found, reduces coal particle and the too low reduction effect that can influence mixed material of limestone particle amount of allocating, amount of allocating are too high
When, the technical indicator of product can not be improved, and the reduction coal wasting of resources can be caused, improve production cost.
According to embodiment of the present utility model, pyrolysis installation 500 has mixed material entrance 501, pyrolysis oil gas vent 502
With pyrolysis material outlet 503, mixed material entrance 501 is connected with mixed material outlet 404, and suitable for mixed material is entered
Row pyrolysis processing, to obtain being pyrolyzed oil gas and pyrolysis material.Inventor is had found, copper ashes particle is utilized in pyrolysis installation
The heat of itself, which carrys out pyrolyzed mixture material, can obtain being pyrolyzed oil gas and pyrolysis material, containing also wherein in pyrolysis material
The semicoke of raw coal pyrolysis gained, the reducing agent that the semicoke can be as pyrolysis material when sequential reduction device reduces.
According to embodiment of the present utility model, there is reduction apparatus 600 pyrolysis material inlet 601 and reducing material to go out
Mouth 602, pyrolysis material inlet 601 is connected with pyrolysis material outlet 503, and suitable for pyrolysis material is gone back
Original place is managed, to obtain reducing material.Inventor has found, because containing the semicoke obtained by reduction pyrolysis of coal in pyrolysis material,
The reducing agent when semicoke can reduce as pyrolysis material reduces to iron, and thus, pyrolysis product is in pyrolysis
Reduction reaction can be completed without additionally addition reducing agent and obtains reducing material, advantageously reduce the cost of material of whole technique,
Save energy consumption.
According to one embodiment of the present utility model, reduction apparatus is not particularly restricted, and those skilled in the art can be with
Selected according to being actually needed, according to a specific embodiment of the present utility model, reduction apparatus can be that heat accumulating type turns bottom
Stove.Thus, be advantageous to improve the reduction efficiency of pyrolysis product.
According to further embodiment of the present utility model, the condition of reduction treatment is not particularly restricted, art technology
Personnel can be selected according to being actually needed, and according to a specific embodiment of the present utility model, the temperature of reduction treatment can
Think 1300~1450 degrees Celsius, the time can be 20~40 minutes.Inventor has been surprisingly found that by many experiments, if reduction temperature
Spend it is low reduction reaction can be made not thorough, cause the rate of recovery of iron to reduce, and the viscosity of slag in pyrolysis product can be increased, enter
And the aggregation of iron is influenceed, and can melt iron as temperature is too high, carbon is floated, ferrous oxide content raises in slag, the viscosity of slag
It is too low, the same aggregation for influenceing iron, and the overlong time of reduction treatment can not further increase the rate of recovery of iron, instead result in
The waste of energy consumption, and if the time it is too short, it is insufficient make it that pyrolysis product reduces in reduction apparatus.Thus, use
The utility model proposes the condition of reduction treatment be remarkably improved the reduction efficiency of pyrolysis product, be advantageous to the aggregation of iron
With grow up, while save energy consumption.
According to another embodiment of the present utility model, the orchid for being in advance 5~10mm in the bottom of reduction apparatus paving thickness
Charcoal.Inventor has found that, because the temperature of copper ashes particle direct-reduction production granulated iron technique is higher, pyrolysis material is after carrying out reduction
Clinker is in half molten state, in order to prevent the clinker of semi-molten state is bonded in reduction apparatus from influenceing discharging, so existing in advance
Complete the convenient discharging of one layer of semi-coke in reduction apparatus bottom.
According to embodiment of the present utility model, there is water quenching-sorting unit 700 reducing material entrance 701, granulated iron to export
702 and tailings outlet 703, reducing material entrance 701 is connected with reducing material outlet 602, and is suitable to enter reducing material
Water-filling is quenched-sorting process, to obtain granulated iron and a tailings.Inventor has found, because of the stone containing coarseness in mixed material
Limestone particles, it is small with the contact area of copper ashes particle and reduction coal particle, after reduction reaction, still there is unreacted calcium oxide
In the presence of when reducing material carries out Water Quenching, calcium oxide reacts with water, heat release expansion, crushes reducing material, sorted place
Part granulated iron can be directly obtained after reason, reduces the energy consumption of technique.Filled specifically, water quenching-sorting unit is granulating unit and sorting
The combined apparatus put.
According to the system of the processing copper ashes of the utility model embodiment by the way that hot copper ashes is pre-processed, closed
The copper ashes particle of thermophilic degree, appropriate reduction coal particle and different grain size limestone particle are then incorporated, and in the environment of anoxybiotic
Lower mixing, avoid reduction coal and burnt in mixing, while varigrained limestone particle can ensure mixed material through also
After the reason of original place, there is unreacted calcium oxide in reducing material, it is anti-to be advantageous to calcium oxide therein and water during reducing material water quenching
Calcium hydroxide should be generated, heat release expansion ruptures reducing material, and the reducing material of fragmentation directly sorted can obtain part granulated iron；
In pyrolysis installation using the copper ashes particle heat of itself come the reduction coal in pyrolyzed mixture material and can obtain be pyrolyzed oil gas and
In pyrolysis material, wherein pyrolysis material pyrolysis can be used as containing the semicoke reduced obtained by pyrolysis of coal, the semicoke
Material reduces in the reducing agent of sequential reduction process to iron, so as to can obtain granulated iron through follow-up water quenching-sorting process.By
This, on the premise of product index is not influenceed, the system can effectively utilize the hot copper ashes sensible heat of itself to reduce energy consumption,
The pretreatment of lime stone and the broken process of sequential reduction material are reduced simultaneously, with handling process is short, equipment investment is low, energy consumption
Low, the advantages that added value of product is high.
In addition, according to embodiment of the present utility model, with reference to figure 2, the system of above-mentioned processing copper ashes further comprises：Slag iron
Separator 800.
According to embodiment of the present utility model, there is slag sluicing system device 800 a tailings entrance 801, iron product to export
802 and secondary tailings outlet 803, a tailings entrance 801 export 703 with tailings and be connected, and be suitable to water quenching-sorting dress
A tailings for putting to obtain carries out slag sluicing system, to obtain iron product and secondary tailings.Inventor has found, by by a tail
Slag delivers to progress slag sluicing system processing in slag sluicing system device, can fully reclaim the iron product in a tailings, so as to enter one
Step improves the rate of recovery of iron.It should be noted that slag sluicing system device is not particularly restricted, those skilled in the art can root
Selected according to being actually needed, such as can be molten separating device or ore grinding-concentration equipment.
To sum up, according to embodiment of the present utility model, the system of above-mentioned processing copper ashes at least have what follows advantage it
One：
Effectively utilized as raw material by using high temperature copper ashes according to the system of the processing copper ashes of the utility model embodiment
The sensible heat pyrolysis reduction coal particle of copper ashes itself, obtains pyrolysis oil, gas, and can preheated mixture material, reduce energy consumption, carry
High product added value；
According to the system of the processing copper ashes of the utility model embodiment, reduction coal can use low-order coal, improve raw material
Using scope；
The stone mixed according to the system of the processing copper ashes of the utility model embodiment by being incorporated different grain size in the feed
Limestone particles can improve the gas permeability of mixed material, improve the condition of mixed material pyrolysis and reduction, and refer to not influenceing product
Under the premise of target, the energy resource consumption of limestone crushing and the broken process of sequential reduction material can be reduced, shortens technological process,
Reduce equipment investment and energy consumption；
Regenerative combustion technology is employed according to the system reducing device of the processing copper ashes of the utility model embodiment, can be made
With inferior or low-rank fuel, fuel cost is reduced, can be promoted at home with the area for lacking natural gas and high-grade fuel.
In order to facilitate understanding, copper ashes is handled below with reference to Fig. 3-4 pairs of systems using the above-mentioned processing copper ashes of the utility model
Method be described in detail.According to embodiment of the present utility model, with reference to figure 3, this method includes：
S100：Copper ashes is supplied into copper ashes pretreatment unit and pre-processed
In the step, copper ashes is supplied into copper ashes pretreatment unit and pre-processed, to obtain copper ashes particle.According to
One embodiment of the present utility model, copper ashes pretreatment unit can include cooling device, the copper ashes breaker being sequentially connected
With copper ashes screening plant.It should be noted that copper ashes is from the iron content copper that the temperature obtained by copper smelting by pyrometallurgical process is high, heat content is big
Slag (temperature is 1200-1300 DEG C).Cooled down specifically, first supplying copper ashes into cooling device, its temperature is down to 700
~900 degrees Celsius, not only improve carry out follow-up broken, screening process at this temperature, ensure that in follow-up pyrolysis installation
Middle mixed material can be pyrolyzed fully in the case of without external heat source；It is then supplied in copper ashes breaker and is crushed,
Copper ashes after being crushed；It is finally fed into copper ashes screening plant, by screening, obtains the copper ashes particle of suitable particle diameter.By
This, is remarkably improved the specific surface area of copper ashes particle, so improve copper ashes particle in anoxybiotic mixing arrangement with reduction coal particle,
The contact area of limestone particle.
According to further embodiment of the present utility model, the particle diameter of copper ashes particle is not particularly restricted, art technology
Personnel can be selected according to being actually needed, and according to a specific embodiment of the present utility model, the particle diameter of copper ashes particle can
With not higher than 2mm.Thus, the specific surface area of copper ashes particle is remarkably improved under the particle diameter, and then improves copper ashes particle in anoxybiotic
In mixing arrangement with reduction coal particle, limestone particle contact area.
S200：Reduction coal is supplied into reduction coal pretreatment unit and pre-processed
In the step, reduction coal is supplied into reduction coal pretreatment unit and pre-processed, to obtain reduction coal
Grain.According to one embodiment of the present utility model, reduction coal pretreatment unit can include the broken dress of reduction coal being sequentially connected
Put and reduction coal screening plant.It should be noted that reduction coal can use low-order coal, such as can be bituminous coal, lignite and long flame
At least one of coal.Specifically, reduction coal is first subjected to break process, the reduction coal after being crushed, after then crushing
Reduction coal carry out screening process, obtain the reduction coal particle of suitable particle diameter.Thus, it is remarkably improved the ratio table of reduction coal particle
Area, and then improve contact area of the reduction coal particle in anoxybiotic mixing arrangement with copper ashes particle, limestone particle.
According to one embodiment of the present utility model, the particle diameter for reducing coal particle is not particularly restricted, art technology
Personnel can be selected according to being actually needed, and according to a specific embodiment of the present utility model, reduce the particle diameter of coal particle
Can be not higher than 1mm.Inventor is had found, the product of reduction coal can be significantly improved using the reduction coal particle of the particle size range
Matter, and then improve reduction effect of pyrolysis efficiency and pyrolysis product of the mixed material in pyrolysis installation in reduction apparatus
Rate.
S300：Lime stone is supplied into lime stone pretreatment unit and pre-processed
In the step, lime stone is supplied into lime stone pretreatment unit and pre-processed, to obtain lime stone
Grain, limestone particle include coarseness limestone particle and fine granularity limestone particle.According to one of the present utility model implementation
Example, lime stone pretreatment unit can include the Limestone crushing device and lime stone screening plant being sequentially connected.Specifically, first
Lime stone is subjected to break process, the uneven broken rear lime stone of granularity is obtained, is then sieved broken rear lime stone, and
Coarseness limestone particle and fine granularity limestone particle are screened out respectively, and the lime stone of two kinds of granularities mixes by a certain percentage
Obtain limestone particle.Inventor has found, using varigrained limestone particle mixed material can be ensured through also original place
After reason, there is unreacted calcium oxide component in reducing material, it is anti-to be advantageous to calcium oxide therein and water during reducing material water quenching
Calcium hydroxide should be generated, heat release expansion ruptures reducing material, and the reducing material of fragmentation directly sorted can obtain part granulated iron.
The limestone particle of different grain size mixing simultaneously can improve the gas permeability of mixed material, improve the bar of mixed material pyrolysis and reduction
Part.Thus, the energy consumption of lime stone pretreatment can have both been reduced, the treatment process of reducing material can be reduced again.
According to one embodiment of the present utility model, the granularity of coarseness limestone particle and fine granularity limestone particle is simultaneously
It is not particularly limited, those skilled in the art can be selected according to being actually needed, specific according to one of the present utility model
Embodiment, the granularity of coarseness limestone particle are not higher than 5mm, preferably 3~5mm, and the granularity of fine granularity limestone particle is not high
In 0.1mm.Inventor has been surprisingly found that by many experiments, can ensure that mixed material is passing through using varigrained limestone particle
After reduction treatment, there is unreacted calcium oxide in reducing material, be advantageous to calcium oxide and water therein during reducing material water quenching
Reaction generation calcium hydroxide, heat release expansion rupture reducing material, and the reducing material of fragmentation directly sorted can obtain part grain
Iron.The limestone particle of different grain size mixing simultaneously can improve the gas permeability of mixed material, improve mixed material pyrolysis and reduction
Condition.Thus, the energy consumption of lime stone pretreatment can have both been reduced, the treatment process of reducing material can be reduced again.
According to further embodiment of the present utility model, the quality of coarseness limestone particle and fine granularity limestone particle
Than being not particularly restricted, those skilled in the art can be selected according to being actually needed, according to one of the present utility model
Specific embodiment, particle diameter is that 3~5mm limestone particle is not higher than 0.1mm limestone particle with particle diameter in limestone particle
Mass ratio can be (0.4~0.8)：1.Inventor has found, when granular limestone amount of allocating is too high, not only influences reduction effect
Fruit, the wasting of resources is also resulted in, when coarseness limestone particle amount of allocating is small, it is impossible to realize metallized pellet water quenching from rupture
Technique effect, increase production process energy consumption.Thus, material can be improved while energy consumption is reduced using the mixed proportion
Reduction effect.
S400：Copper ashes particle, reduction coal particle and limestone particle are supplied into anoxybiotic mixing arrangement and mixed
In the step, copper ashes particle, reduction coal particle and limestone particle are supplied into anoxybiotic mixing arrangement and mixed
Close, to obtain mixed material.Specifically, by the copper ashes particle of preference temperature and reduction coal particle, limestone particle according to one
Certainty ratio is delivered in anoxybiotic mixing arrangement and mixed under anoxic condition, mixed material is obtained after well mixed, in mixing
When need to be in anoxic condition under, avoid reduction coal mixing when occur burning and cause the loss of reduction coal.
According to one embodiment of the present utility model, the mixing ratio of copper ashes particle, reduction coal particle and limestone particle is simultaneously
It is not particularly limited, those skilled in the art can be selected according to being actually needed, specific according to one of the present utility model
Embodiment, the mass ratio of copper ashes particle, reduction coal particle and limestone particle can be 100：(30~50)：(10~15).Hair
A person of good sense has found, reduces coal particle and the too low reduction effect that can influence mixed material of limestone particle amount of allocating, amount of allocating are too high
When, the technical indicator of product can not be improved, and the reduction coal wasting of resources can be caused, improve production cost.
S500：Mixed material is supplied into pyrolysis installation and carries out pyrolysis processing
In the step, mixed material is supplied into pyrolysis installation and carries out pyrolysis processing, to obtain being pyrolyzed oil gas and to consolidate
Body heat solution material.Inventor has found, be can obtain in pyrolysis installation using the copper ashes particle heat of itself come pyrolyzed mixture material
Oil gas and pyrolysis material are pyrolyzed, can be made containing the semicoke reduced obtained by pyrolysis of coal, the semicoke wherein in pyrolysis material
For reducing agent of the pyrolysis material when sequential reduction device reduces.
S600：Pyrolysis material is supplied into reduction apparatus and carries out reduction treatment
In the step, pyrolysis material is supplied into reduction apparatus and carries out reduction treatment, to obtain reducing material.
Inventor has found that, because containing the semicoke obtained by reduction pyrolysis of coal in pyrolysis material, the semicoke can be used as pyrolysis material
Reducing agent during reduction, thus, pyrolysis product can complete reduction reaction without additionally addition reducing agent in pyrolysis and obtain
To reducing material, the cost of material of whole technique is advantageously reduced, saves energy consumption.
According to one embodiment of the present utility model, the condition of reduction treatment is not particularly restricted, people in the art
Member can be selected according to being actually needed, and according to a specific embodiment of the present utility model, the temperature of reduction treatment can be with
For 1300~1450 degrees Celsius, the time can be 20~40 minutes.Inventor has been surprisingly found that by many experiments, if reduction temperature
It is too low that reduction reaction can be made not thorough, cause the rate of recovery of iron to reduce, and the viscosity of slag in pyrolysis product can be increased, and then
The aggregation of iron is influenceed, and can melt iron as temperature is too high, carbon is floated, ferrous oxide content raises in slag, the viscosity mistake of slag
It is low, the same aggregation for influenceing iron, and the overlong time of reduction treatment can not further increase the rate of recovery of iron, instead result in energy
The waste of consumption, and if the time it is too short, it is insufficient make it that pyrolysis product reduces in reduction apparatus.Thus, using this
The condition for the reduction treatment that utility model proposes is remarkably improved the reduction efficiency of pyrolysis product, be advantageous to iron aggregation and
Grow up, while save energy consumption.
According to further embodiment of the present utility model, the orchid for being in advance 5~10mm in the bottom of reduction apparatus paving thickness
Charcoal.Inventor has found that, because the temperature of copper ashes particle direct-reduction production granulated iron technique is higher, pyrolysis material is after carrying out reduction
Clinker is in half molten state, in order to prevent the clinker of semi-molten state is bonded in reduction apparatus from influenceing discharging, so existing in advance
Complete the convenient discharging of one layer of semi-coke in reduction apparatus bottom.
S700：Reducing material is supplied to water quenching-sorting unit and carries out water quenching-sorting process
In the step, reducing material is supplied to water quenching-sorting unit and carries out water quenching-sorting process, to obtain granulated iron
With a tailings.Inventor has found, because of the limestone particle containing coarseness in mixed material, itself and copper ashes particle and reduction coal
The contact area of particle is small, and after reduction reaction, still with the presence of unreacted calcium oxide, Water Quenching is carried out in reducing material
When, calcium oxide reacts with water, heat release expansion, crushes reducing material, part granulated iron can be directly obtained after sorted processing, reduce
The energy consumption of technique.
The method of copper ashes is handled by the way that hot copper ashes is entered according to the system of the processing copper ashes of the utility model embodiment
Row pretreatment, obtains the copper ashes particle of suitable temperature, is then incorporated appropriate reduction coal particle and different grain size limestone particle,
And mixed in the environment of anoxybiotic, avoid reduction coal and burnt in mixing, while varigrained limestone particle can ensure
Mixed material also has unreacted calcium oxide after reduction treatment in reducing material, when being advantageous to reducing material water quenching wherein
Calcium oxide and water reaction generation calcium hydroxide, heat release expansion ruptures reducing material, the reducing material of fragmentation can directly through point
Choosing obtains part granulated iron；Using the copper ashes particle heat of itself come the reduction coal in pyrolyzed mixture material and can in pyrolysis installation
Obtain being pyrolyzed oil gas and pyrolysis material, the semicoke reduced obtained by pyrolysis of coal, the semicoke are contained wherein in pyrolysis material
Iron can be reduced as reducing agent of the pyrolysis material in sequential reduction process, so as to through follow-up water quenching-sorting process
It can obtain granulated iron.Thus, on the premise of product index is not influenceed, the system can effectively utilize the hot copper ashes sensible heat of itself
To reduce energy consumption, while reduce the pretreatment of lime stone and the broken process of sequential reduction material, have handling process it is short,
The advantages that equipment investment is low, energy consumption is low, added value of product is high.
In addition, according to embodiment of the present utility model, with reference to figure 4, the method for the system processing copper ashes of above-mentioned processing copper ashes
Further comprise：
S800：The tailings that S700 is obtained, which supplies, carries out slag sluicing system into slag sluicing system device
In the step, a tailings that S700 is obtained, which supplies, carries out slag sluicing system into slag sluicing system device, so as to
To iron product and secondary tailings.Inventor has found, is carried out by the way that a tailings is delivered in slag sluicing system device at slag sluicing system
Reason, can fully reclaim the iron product in a tailings, so as to further improve the rate of recovery of iron.It should be noted that slag iron
Separator is not particularly restricted, and those skilled in the art can be selected according to being actually needed, such as can be molten point
Device or ore grinding-concentration equipment.
It should be noted that the feature and advantage described by the above-mentioned system for processing copper ashes are equally applicable to the processing
The method of the system processing copper ashes of copper ashes, here is omitted.
Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only
Descriptive, without limiting the utility model in any way.
Embodiment 1
By high temperature copper ashes, (TFe contains 0.24wt% and temperature containing 0.87wt%, Zn containing 38.65wt%, Cu containing 0.52wt%, Pb
Spend for 1200-1300 DEG C) cooled down, crushed and screening process successively, the copper ashes particle that granularity is not higher than 2mm is obtained, by cigarette
Coal and lime stone carry out broken and screening process successively respectively, respectively obtain granularity as the bituminous coal particle and grain not higher than 1mm
The coarseness limestone particle and fine granularity limestone particle of the particle diameter not higher than 0.1mm for 3~5mm are spent, by above-mentioned copper ashes
Grain, bituminous coal particle and limestone particle are according to mass ratio 100：30：10 are mixed in anoxybiotic mixing arrangement, obtain mixture
Material, wherein, the mass ratio of coarseness limestone particle and fine granularity limestone particle is 0.4：1, then this mixed material is sent
It is pyrolyzed into pyrolysis installation, obtains being pyrolyzed oil gas and pyrolysis material, then pyrolysis material is distributed into successively and turns bottom
Stove carries out reduction roasting, and before pyrolysis material is distributed into rotary hearth furnace, the thick semi-cokes of one layer of 5mm are stepped into rotary furnace bottom,
The temperature of reduction treatment is 1350 degrees Celsius, time 40min, after reduction reaction terminates, reduction that rotary hearth furnace is discharged to obtain
Material is sent into water quenching-sorting unit and carries out water quenching and sorting process successively, obtains granulated iron and a tailings, one time tailings is sent again
Enter slag sluicing system device and carry out molten office to manage to obtain iron product and secondary tailings, the rate of recovery of whole flow process iron is 98.26%, two
Secondary tailings can be used as building materials raw material.
Embodiment 2
By high temperature copper ashes, (TFe contains 0.29wt% and temperature containing 0.92wt%, Zn containing 40.31wt%, Cu containing 0.55wt%, Pb
Spend for 1200-1300 DEG C) cooled down, crushed and screening process successively, the copper ashes particle that granularity is not higher than 2mm is obtained, will be brown
Coal and lime stone carry out broken and screening process successively respectively, respectively obtain granularity as the lignite particle and grain not higher than 1mm
The coarseness limestone particle and fine granularity limestone particle of the particle diameter not higher than 0.1mm for 3~5mm are spent, then by above-mentioned copper
Solid impurity particle, lignite particle and limestone particle are according to mass ratio 100：40：12 are mixed in anoxybiotic mixing arrangement, are mixed
Compound material, wherein, the mass ratio of coarseness limestone particle and fine granularity limestone particle is 0.6：1, then by this mixture
Material, which is delivered in pyrolysis installation, to be pyrolyzed, and obtains being pyrolyzed oil gas and pyrolysis material, then pyrolysis material is distributed into successively
Rotary hearth furnace carries out reduction roasting, and before pyrolysis material is distributed into rotary hearth furnace, the thick orchids of one layer of 8mm are stepped into rotary furnace bottom
Charcoal, the temperature of reduction treatment is 1400 degrees Celsius, time 30min, after reduction reaction terminates, is gone back what rotary hearth furnace discharged to obtain
Raw material is sent into water quenching-sorting unit and carries out water quenching and sorting process successively, obtains granulated iron and a tailings, a tailings is again
Feeding slag sluicing system device carries out molten office and manages to obtain iron product and secondary tailings, and the rate of recovery of whole flow process iron is 92.39%,
Secondary tailings can be used as building materials raw material.
Embodiment 3
By high temperature copper ashes, (TFe contains 0.29wt% and temperature containing 0.92wt%, Zn containing 40.31wt%, Cu containing 0.55wt%, Pb
Spend for 1200-1300 DEG C) cooled down, crushed and screening process successively, the copper ashes particle that granularity is not higher than 2mm is obtained, by length
Flame coal and lime stone carry out broken and screening process successively respectively, respectively obtain granularity for the long flame coal particle not higher than 1mm with
, then will be upper and the coarseness limestone particle that granularity is 3~5mm is not higher than 0.1mm fine granularity limestone particle with particle diameter
Copper ashes particle, long flame coal particle and limestone particle are stated according to mass ratio 100：40：15 are mixed in anoxybiotic mixing arrangement,
Mixed material is obtained, wherein, the mass ratio of coarseness limestone particle and fine granularity limestone particle is 0.8：1, then by this
Mixed material is delivered in pyrolysis installation and is pyrolyzed, and obtains being pyrolyzed oil gas and pyrolysis material, by pyrolysis material land
The continuous rotary hearth furnace that is distributed into carries out reduction roasting, and before pyrolysis material is distributed into rotary hearth furnace, one layer is stepped into rotary furnace bottom
Semi-coke thick 10mm, the temperature of reduction treatment is 1450 degrees Celsius, time 20min, after reduction reaction terminates, rotary hearth furnace is gone out
The reducing material for expecting to obtain is sent into water quenching-sorting unit and carries out water quenching and sorting process successively, obtains granulated iron and a tailings,
Tailings, which is re-fed into slag sluicing system device, to carry out molten office and manages to obtain iron product and secondary tailings, the rate of recovery of whole flow process iron
For 94.62%, secondary tailings can be used as building materials raw material.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (6)
- A kind of 1. system for handling copper ashes, it is characterised in that including：Copper ashes pretreatment unit, the copper ashes pretreatment unit have copper ashes entrance and copper ashes particle outlet；Reduction coal pretreatment unit, the reduction coal pretreatment unit have reduction coal entrance and reduction coal particle outlet；Lime stone pretreatment unit, the lime stone pretreatment unit have lime stone entrance, the outlet of coarseness limestone particle Exported with fine granularity limestone particle；There is copper ashes particle entrance, reduction coal particle entrance, limestone particle to enter for anoxybiotic mixing arrangement, the anoxybiotic mixing arrangement Mouthful and mixed material outlet, the copper ashes particle entrance is connected with the copper ashes particle outlet, the reduction coal particle entrance and The reduction coal particle outlet is connected, the limestone particle entrance respectively with the coarseness limestone particle outlet and it is described The outlet of fine granularity limestone particle is connected；Pyrolysis installation, the pyrolysis installation has mixed material entrance, pyrolysis oil gas vent and pyrolysis material outlet, described Mixed material entrance is connected with mixed material outlet；Reduction apparatus, the reduction apparatus have pyrolysis material inlet and reducing material outlet, the pyrolysis material Entrance is connected with the pyrolysis material outlet；Water quenching-sorting unit, the water quenching-sorting unit have reducing material entrance, granulated iron outlet and a tailings outlet, institute Reducing material entrance is stated with reducing material outlet to be connected.
- 2. system according to claim 1, it is characterised in that further comprise：Slag sluicing system device, the slag sluicing system device have a tailings entrance, iron product outlet and the outlet of secondary tailings, institute A tailings entrance is stated with tailings outlet to be connected.
- 3. system according to claim 1 or 2, it is characterised in that the copper ashes pretreatment unit includes what is be sequentially connected Cooling device, copper ashes breaker and copper ashes screening plant.
- 4. system according to claim 1 or 2, it is characterised in that the reduction coal pretreatment unit includes being sequentially connected Reduction coal breaker and reduction coal screening plant.
- 5. system according to claim 1 or 2, it is characterised in that the lime stone pretreatment unit includes being sequentially connected Limestone crushing device and lime stone screening plant.
- 6. system according to claim 1 or 2, it is characterised in that the reduction apparatus is regenerative rotary hearth furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720560818.8U CN206828558U (en) | 2017-05-18 | 2017-05-18 | The system for handling copper ashes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720560818.8U CN206828558U (en) | 2017-05-18 | 2017-05-18 | The system for handling copper ashes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206828558U true CN206828558U (en) | 2018-01-02 |
Family
ID=60771954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720560818.8U Expired - Fee Related CN206828558U (en) | 2017-05-18 | 2017-05-18 | The system for handling copper ashes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206828558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022664A (en) * | 2017-05-18 | 2017-08-08 | 江苏省冶金设计院有限公司 | The system and method for handling copper ashes |
-
2017
- 2017-05-18 CN CN201720560818.8U patent/CN206828558U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022664A (en) * | 2017-05-18 | 2017-08-08 | 江苏省冶金设计院有限公司 | The system and method for handling copper ashes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102719676B (en) | Method for rapidly reducing copper slags to produce iron-copper alloys in kiln in reducing atmosphere | |
| CN102363218B (en) | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly | |
| CN104404246B (en) | The method improving metallurgical slag pelletizing degree of metalization | |
| CN101403043A (en) | Method for producing ferronickel granule with direct reduction of laterite nickel mine with rotary kiln | |
| CN102634621A (en) | Device and method for treating refractory iron ore | |
| CN103667743A (en) | Treatment method of laterite-nickel ore | |
| CN103667742A (en) | Treatment method of laterite-nickel ore | |
| CN106676263A (en) | Method and system for comprehensive utilization of copper tailings and converter coarse dust ash | |
| CN101967571B (en) | Method for using red-soil nickel ore to produce nickel-iron alloy in tunnel kiln-electric furnace | |
| CN103451451A (en) | Ferro-nickel alloy production technology with laterite nickel ore processed through oxygen enrichment hot air shaft furnace | |
| CN103276294A (en) | Method for rapidly reducing nickel slag to produce iron-nickel-copper alloy powder in kiln under reducing atmosphere | |
| CN104164556A (en) | Chain grate-tandem rotary kiln whole-particle fraction magnetic roasting process for refractory low-grade iron ore | |
| CN103866115B (en) | The preparation of red soil nickel ore single stage method is containing the method for nickel and stainless steel raw material | |
| CN105907990A (en) | Method of producing ferrocolumbium | |
| CN204281821U (en) | The system of separating valuable metals from copper ashes | |
| CN206828558U (en) | The system for handling copper ashes | |
| CN106119530A (en) | Process the method and system of zinc kiln slag | |
| CN106119531A (en) | Comprehensive utilization Zinc volatilization kiln slag and the method and system of red mud | |
| CN103074484A (en) | Comprehensive treatment method of oolitic hematite containing phosphorus and red mud | |
| CN101358291A (en) | Feedstock for preparing low nickel matte | |
| CN107022664A (en) | The system and method for handling copper ashes | |
| CN101358281B (en) | Lateritic ore preprocess method | |
| CN105506209A (en) | Method for producing granular iron via direct reduction of high-phosphorus oolitic hematite by utilizing rotary hearth furnace | |
| CN206256139U (en) | The system for processing zinc leaching residue | |
| CN107217154A (en) | Handle the method and system of lateritic nickel ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20180102 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20180102 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180102 Termination date: 20190518 |