CN208275059U - A kind of high energy scrubber of the positive persursor material of lithium electricity - Google Patents

A kind of high energy scrubber of the positive persursor material of lithium electricity Download PDF

Info

Publication number
CN208275059U
CN208275059U CN201820469800.1U CN201820469800U CN208275059U CN 208275059 U CN208275059 U CN 208275059U CN 201820469800 U CN201820469800 U CN 201820469800U CN 208275059 U CN208275059 U CN 208275059U
Authority
CN
China
Prior art keywords
filter
plate
high energy
lithium electricity
persursor material
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
Application number
CN201820469800.1U
Other languages
Chinese (zh)
Inventor
陈荣宇
赵世贞
刘澧浦
李健
田吉平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGMEN CHANCSUN UMICORE INDUSTRY Co Ltd
Original Assignee
JIANGMEN CHANCSUN UMICORE INDUSTRY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JIANGMEN CHANCSUN UMICORE INDUSTRY Co Ltd filed Critical JIANGMEN CHANCSUN UMICORE INDUSTRY Co Ltd
Priority to CN201820469800.1U priority Critical patent/CN208275059U/en
Application granted granted Critical
Publication of CN208275059U publication Critical patent/CN208275059U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Cleaning By Liquid Or Steam (AREA)

Abstract

The utility model discloses a kind of high energy scrubbers of positive persursor material of lithium electricity, including rack, rack is provided with girder, one end of girder is provided with thrust plate, the other end of girder is provided with pressure plate and connects the hydraulic device of pressure plate, thrust plate is provided with first charging aperture, filter assemblies are provided between thrust plate and pressure plate, filter assemblies include the filter plate that several horizontal directions stack, filter chamber is formed between adjacent filter plate, adjacent filter chamber connection, filter chamber close to thrust plate is connected to first charging aperture, filter cloth is provided in filter chamber, filter cloth is connect with filter plate, several filter plates are slidably connected with girder, the filter plate or pressure plate for being bonded pressure plate are provided with second charging aperture.A kind of high energy scrubber of the positive persursor material of lithium electricity of the utility model, avoids feed inlet from blocking, keeps charging abundant.

Description

A kind of high energy scrubber of the positive persursor material of lithium electricity
Technical field
The utility model relates to the production equipment of the positive persursor material of lithium electricity more particularly to a kind of positive presomas of lithium electricity The high energy scrubber of material.
Background technique
In the prior art, lithium electricity anode persursor material be make lithium electricity anode intermediate product, mainly containing nickel, The compound of cobalt and manganese, the compound of nickel, cobalt and manganese is in industry referred to as ternary precursor again.Manufacture the process of ternary precursor Solution is usually first produced, the means such as then filtered, evaporated and producing solid ternary precursor.
To improve production efficiency, the filter press of sewage treatment industry is gradually applied to lithium electricity by existing manufacturing enterprise The production process of the persursor material of anode, makes ternary precursor form filter cake between the filter plate of filter press, to accelerate to reduce Moisture.
When using filter press, usually also it can be passed through again washing water after forming filter cake, filter cake is cleaned, removal filter Impurity in cake, thus, filter press is referred to as washer again in lithium electricity industry.
However, ternary precursor is easy deposition, feed inlet can be blocked, causes to feed insufficient, the filter cake size of formation is not One, reduce the production efficiency of washer.
Utility model content
The utility model aims to solve the problem that above-mentioned mentioned technical problem, provides a kind of height of positive persursor material of lithium electricity Washer is imitated, feed inlet is avoided to block, keeps charging abundant.
The utility model is realized through the following technical scheme:
A kind of high energy scrubber of the positive persursor material of lithium electricity, including rack, rack are provided with girder, one end of girder It is provided with thrust plate, the other end of girder is provided with pressure plate and connects the hydraulic device of pressure plate, and thrust plate is provided with first Feed inlet, is provided with filter assemblies between thrust plate and pressure plate, filter assemblies include the filter plate that several horizontal directions stack, phase Filter chamber, adjacent filter chamber connection are formed between adjacent filter plate, the filter chamber close to thrust plate is connected to first charging aperture, sets in filter chamber It is equipped with filter cloth, filter cloth is connect with filter plate, and several filter plates are slidably connected with girder, and the filter plate or pressure plate for being bonded pressure plate are provided with Second charging aperture.
Preferably, the diameter of second charging aperture is less than the diameter of first charging aperture.
Preferably, pressure plate is provided with limit spring backwards to the side of filter plate.
Preferably, girder is provided with the wiper mechanism for cleaning filter cloth, and wiper mechanism is slidably connected with girder.
Further, wiper mechanism includes spray tube, the lifting assembly for driving spray tube lifting, the branch for connecting lifting assembly Frame, bracket are connect with girder by rack-and-pinion.
Further, the length direction of spray tube and several filter plates stack that direction is vertical, the radially-outer surface of spray tube It is provided with several spray apertures.
Further, lifting assembly is provided with the lifting cylinder of connection spray tube, and the bottom of spray tube is provided with for inciting somebody to action The first scraper plate that filter cake strikes off from filter plate.
Preferably, the bottom of girder is provided with panel turnover mechanism, and panel turnover mechanism is connect with rack, and panel turnover mechanism is turned over including first Plate, the second turnover panel, the Power Component for driving the first turnover panel and the rotation of the second turnover panel.
Further, the center of rotation of the first turnover panel is lower than the center of rotation of the second turnover panel, and the second turnover panel can be overlapped in On first turnover panel.
Further, the first turnover panel is provided with sink backwards to the side of the second turnover panel, and connection spray tube is provided in sink Outlet pipe and water pump.
Beneficial effect is: compared with prior art, a kind of positive persursor material of lithium electricity of the utility model is efficiently washed Wash device by fitting pressure plate filter plate or direct pressure plate on be provided with second charging aperture, realize washer it is two-way into Material avoids difficult feed problem caused by blocking first charging aperture, and washer is made to feed uniformly abundant, the filter cake size of formation Unanimously, the ability of washer is given full play to;Also by setting second charging aperture, the convenient first charging aperture to blocking carries out anti- Blow, the case where convenient for releasing first charging aperture blocking so that washer can be applied to easy deposit remove moisture solution.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used briefly describes.
Obviously, described attached drawing is a part of the embodiment of the utility model, rather than whole embodiments, this field Technical staff without creative efforts, can also be obtained according to these attached drawings other design schemes and attached Figure.
Fig. 1 is a kind of structural schematic diagram of the high energy scrubber of the positive persursor material of lithium electricity of the utility model;
Fig. 2 is the other direction view of Fig. 1 washer.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.
Obviously, described embodiment is a part of the embodiment of the utility model, rather than whole embodiments, is based on The embodiments of the present invention, those skilled in the art's other implementations obtained without creative efforts Example, belongs to the protection scope of the utility model.
In addition, all connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific reality Situation is applied, by adding or reducing connection auxiliary, to form more preferably connection structure.Each technology in the utility model is special Sign, can be with combination of interactions under the premise of not conflicting conflict.
As shown in Figure 1, a kind of high energy scrubber of the positive persursor material of lithium electricity, including rack 1, rack 1 are provided with master Beam 2.
One end of girder 2 is provided with thrust plate 3, and the other end of girder 2 is provided with pressure plate 4 and connects the liquid of pressure plate 4 Pressure device.
Thrust plate 3 is provided with first charging aperture 31, is provided with filter assemblies between thrust plate 3 and pressure plate 4.
Filter assemblies include the filter plate 5 that several horizontal directions stack, and filter chamber, adjacent filter are formed between adjacent filter plate 5 Room connection.
Filter chamber close to thrust plate 3 is connected to first charging aperture 31, filter cloth is provided in filter chamber, filter cloth is connect with filter plate 5. Several filter plates 5 are slidably connected with girder 2.
When using washer, pressure plate 4 pushes the filter plate 5 to scatter to thrust plate 3, and filter plate 5 is mutually close to, adjacent filter plate Filter chamber is formed between 5.Then, the solution containing ternary precursor is entered by first charging aperture 31 close to thrust under the drive of pump The filter chamber of plate 3, then solution continues to flow, until flowing into the filter chamber close to pressure plate 4.
In filter chamber, filter cloth separates the solid matter in solution with liquid substance, and solid matter forms filter in filter chamber Cake, liquid are discharged.
The water hole realization that can directly begin to rehearse by filter plate 5 is discharged in liquid, is also possible to filter plate 5 and opens up drainage hole, drains Through-hole is interconnected to form drainage pipeline, and liquid is discharged together from drainage pipeline.
Commonly drainage pipeline is connect with thrust plate 3, and the drainage hole of communicated drainage pipeline is arranged in thrust plate 3, convenient Drainpipe outside connection.
Drainage pipeline should select one of those as cleaning solution entrance to be multiple, then select one to export for cleaning solution.When Filter cake formed certain thickness when, cleaning solution entrance is passed through cleaning solution, filter cake is washed, remove impurity, last cleaning solution from Cleaning solution outlet discharge.
To make full use of cleaning solution, it is additionally provided with filter device, cleaning solution is recycled.
Since ternary precursor contains three kinds of nickel, cobalt, manganese ingredients, it is easy to deposit, will lead to the blocking of first charging aperture 31 Or filter chamber blocking, easily there is a situation where the filter chamber close to pressure plate 4 is not filled with solution or filling is discontented.
To prevent first charging aperture 31 from blocking or filter chamber blocking, the present embodiment passes through the filter plate 5 or pressure in fitting pressure plate 4 Tight plate 4 is provided with the solution of second charging aperture 41.
The present embodiment is realized by being provided with second charging aperture 41 on the filter plate 5 or pressure plate 4 of fitting pressure plate 4 The bidirectional feed of washer avoids difficult feed problem caused by blocking first charging aperture 31, fills washer charging uniformly Point, the filter cake of formation is in the same size, gives full play to the ability of washer.
The present embodiment also passes through setting second charging aperture 41, and the convenient first charging aperture 31 to blocking carries out blowback, is convenient for Release the case where first charging aperture 31 blocks so that washer can be applied to easy deposit remove moisture solution.
The filter plate 5 for being bonded pressure plate 4 is different from conventional filter plate 5, usually only cooperatively forms filter chamber, general not have routine The structures such as filter cloth set by filter plate 5, drainage hole.
The filter plate 5 or pressure plate 4 for being bonded pressure plate 4 are provided with second charging aperture 41, refer to the filter plate 5 of fitting pressure plate 4 It is provided with second charging aperture 41, alternatively, pressure plate 4 is provided directly with second charging aperture 41.
Since position and space limit, the outer profile of the filter plate 5 of fitting pressure plate 4 can only be arranged in second charging aperture 41 Place, alternatively, pressure plate 4 can only be arranged in second charging aperture 41 outer profile or pressure plate 4 are backwards to 5 side of filter plate.
It, can be with to reduce the influence for opening up second charging aperture 41 to the intensity of the filter plate 5 of pressure plate 4 and fitting pressure plate 4 The diameter of second charging aperture 41 is set to be less than the diameter of first charging aperture 31.
The feed pipe that second charging aperture 41 is connected when to avoid 4 return of pressure plate collides with hydraulic device, can make Pressure plate 4 is provided with limit spring backwards to the side of filter plate 5.
Just filter cloth need to once be cleaned after producing filter cake due to washer, traditional cleaning formulations are needed filter plate 5 It removes, then cleans one by one, cleaning efficiency is low, also causes washer production and pauses.
To solve the problems, such as that cleaning is inconvenient, girder 2 can be made to be provided with the wiper mechanism 6 for cleaning filter cloth, cleaning machine Structure 6 is slidably connected with girder 2.
To realize automatic cleaning, the lifting group that wiper mechanism 6 can be made to include spray tube 61, spray tube 61 is driven to go up and down Part, the bracket for connecting lifting assembly, bracket are connect with girder 2 by rack-and-pinion.
To ensure that spray tube 61 can uniformly clean up filter cloth, can make the length direction of spray tube 61 with it is several Filter plate 5 stacks that direction is vertical, and the radially-outer surface of spray tube 61 is provided with several spray apertures.
Since filter cake would generally attach on filter cloth, it usually needs manually remove filter cake, expend more time.
To improve the efficiency for removing filter cake, the function of wiper mechanism 6 can be expanded, that is, lifting assembly can be made to be arranged There is the lifting cylinder 63 of connection spray tube 61, the bottom of spray tube 61 is provided with first for striking off filter cake from filter plate 5 Scraper plate 62.
Make wiper mechanism 6 that there is the function of removing filter cake from filter cloth, first need only be arranged in the bottom of spray tube 61 Scraper plate 62, simple for structure, increased amount of parts is few, keeps washer compact-sized.
Since filter cake can be fallen on the conveyer belt below washer after filter cloth separation, it is transported away by conveyer belt.
As shown in Fig. 2, the bottom of girder 2 can be made to be provided with panel turnover mechanism to fall filter cake accurately on the conveyor belt 7, panel turnover mechanism 7 is connect with rack 1, and panel turnover mechanism 7 includes the first turnover panel 71, the second turnover panel 72, drives the first turnover panel 71 and the The Power Component of two turnover panels 72 rotation.
In general, the first turnover panel 71 and the second turnover panel 72 are identical, and installation site is identical, 71 He of the first turnover panel to be easily installed Second turnover panel 72 cooperate it is V-shaped so that filter cake is accurately fallen on the conveyor belt.
However, when wiper mechanism 6 cleans filter cloth, cleaning water used can also fall along the moving line of filter cake, then It has accurately fallen on conveyer belt, conveyer belt is caused to get wet, be easy to make the operation of conveyer belt to lead to the problem of, also be easy to cause filter cake Again it absorbs water.
To solve the problem that cleaning water used falls in conveyer belt, the center of rotation of the first turnover panel 71 can be made low In the center of rotation of the second turnover panel 72, the second turnover panel 72 can be overlapped on the first turnover panel 71.
That is, the position of the second turnover panel 72 is higher than the first turnover panel 71, after the water of cleaning is fallen on panel turnover mechanism 7, by the Two turnover panels 72 flow to the first turnover panel 71, finally flow to the side of washer.
To recycle the water energy of cleaning enough, the first turnover panel 71 can be made to be provided with backwards to the side of the second turnover panel 72 Sink is provided with the outlet pipe and water pump of connection spray tube 61 in sink.
Sink, outlet pipe and water pump are not drawn into.
Above embodiments are not limited to the technical solution of the embodiment itself, can be incorporated between embodiment new Embodiment.Above embodiments are only to illustrate the technical solution of the utility model and are not intended to limit it, all without departing from this Any modification of utility model spirit and scope or equivalent replacement should all cover the range in technical solutions of the utility model It is interior.

Claims (10)

1. a kind of high energy scrubber of the positive persursor material of lithium electricity, including rack (1), rack (1) are provided with girder (2), main One end of beam (2) is provided with thrust plate (3), and the other end of girder (2) is provided with pressure plate (4) and connects the liquid of pressure plate (4) Pressure device, thrust plate (3) are provided with first charging aperture (31), are provided with filter assemblies between thrust plate (3) and pressure plate (4), Filter assemblies include the filter plate (5) that several horizontal directions stack, and filter chamber is formed between adjacent filter plate (5), and adjacent filter chamber connects Logical, the filter chamber close to thrust plate (3) is connected to first charging aperture (31), filter cloth is provided in filter chamber, filter cloth and filter plate (5) are even It connects, several filter plates (5) are slidably connected with girder (2), which is characterized in that the filter plate (5) or pressure plate (4) of fitting pressure plate (4) It is provided with second charging aperture (41).
2. a kind of high energy scrubber of the positive persursor material of lithium electricity according to claim 1, which is characterized in that described the The diameter of two feed inlets (41) is less than the diameter of first charging aperture (31).
3. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 1, which is characterized in that the pressure Tight plate (4) is provided with limit spring backwards to the side of filter plate (5).
4. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 1, which is characterized in that the master Beam (2) is provided with the wiper mechanism (6) for cleaning filter cloth, and wiper mechanism (6) is slidably connected with girder (2).
5. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 4, which is characterized in that described clear Washing machine structure (6) includes spray tube (61), the lifting assembly for driving spray tube (61) lifting, the bracket for connecting lifting assembly, bracket It is connect with girder (2) by rack-and-pinion.
6. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 5, which is characterized in that the spray The length direction of shower pipe (61) and several filter plates (5) stack that direction is vertical, spray tube (61) if radially-outer surface be provided with Dry spray apertures.
7. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 5, which is characterized in that the liter Part of coming down to a lower group is provided with the lifting cylinder (63) of connection spray tube (61), the bottom of spray tube (61) be provided with for by filter cake from filter The first scraper plate (62) struck off on plate (5).
8. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 1, which is characterized in that the master The bottom of beam (2) is provided with panel turnover mechanism (7), and panel turnover mechanism (7) is connect with rack (1), and panel turnover mechanism (7) includes the first turnover panel (71), the second turnover panel (72), the Power Component for driving the first turnover panel (71) and the second turnover panel (72) to rotate.
9. a kind of high energy scrubber of the positive persursor material of lithium electricity according to claim 8, which is characterized in that described the The center of rotation of one turnover panel (71) is lower than the center of rotation of the second turnover panel (72), and the second turnover panel (72) can be overlapped in the first turnover panel (71) on.
10. a kind of high energy scrubber of positive persursor material of lithium electricity according to claim 9, which is characterized in that described First turnover panel (71) is provided with sink backwards to the side of the second turnover panel (72), and the water outlet of connection spray tube (61) is provided in sink Pipe and water pump.
CN201820469800.1U 2018-03-30 2018-03-30 A kind of high energy scrubber of the positive persursor material of lithium electricity Expired - Fee Related CN208275059U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820469800.1U CN208275059U (en) 2018-03-30 2018-03-30 A kind of high energy scrubber of the positive persursor material of lithium electricity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820469800.1U CN208275059U (en) 2018-03-30 2018-03-30 A kind of high energy scrubber of the positive persursor material of lithium electricity

Publications (1)

Publication Number Publication Date
CN208275059U true CN208275059U (en) 2018-12-25

Family

ID=64750383

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820469800.1U Expired - Fee Related CN208275059U (en) 2018-03-30 2018-03-30 A kind of high energy scrubber of the positive persursor material of lithium electricity

Country Status (1)

Country Link
CN (1) CN208275059U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110420487A (en) * 2019-08-30 2019-11-08 湖南省康多利油脂有限公司 An anti-clogging filter press for oil processing that is convenient for scraping inner wall materials
CN111589198A (en) * 2020-05-21 2020-08-28 南京山河环境科技有限公司 Waste water recovery device used after cleaning of filter press and working method thereof
CN111643938A (en) * 2020-06-28 2020-09-11 中国恩菲工程技术有限公司 Separation device for ternary lithium-ion battery precursor
CN114405085A (en) * 2022-01-25 2022-04-29 泉州市创绿机械工贸有限公司 Bidirectional parallel voltage-stabilizing feeding type circular plate filter press
CN115663290A (en) * 2022-09-29 2023-01-31 中国恩菲工程技术有限公司 Washing and separating automatic control system for ternary lithium ion battery precursor and use method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110420487A (en) * 2019-08-30 2019-11-08 湖南省康多利油脂有限公司 An anti-clogging filter press for oil processing that is convenient for scraping inner wall materials
CN110420487B (en) * 2019-08-30 2021-07-20 湖南省康多利油脂有限公司 An anti-blocking filter press for grease processing that is convenient for scraping off inner wall materials
CN111589198A (en) * 2020-05-21 2020-08-28 南京山河环境科技有限公司 Waste water recovery device used after cleaning of filter press and working method thereof
CN111643938A (en) * 2020-06-28 2020-09-11 中国恩菲工程技术有限公司 Separation device for ternary lithium-ion battery precursor
CN114405085A (en) * 2022-01-25 2022-04-29 泉州市创绿机械工贸有限公司 Bidirectional parallel voltage-stabilizing feeding type circular plate filter press
CN114405085B (en) * 2022-01-25 2023-02-10 泉州市创绿机械工贸有限公司 Bidirectional parallel voltage-stabilizing feeding type circular plate filter press
CN115663290A (en) * 2022-09-29 2023-01-31 中国恩菲工程技术有限公司 Washing and separating automatic control system for ternary lithium ion battery precursor and use method thereof
CN115663290B (en) * 2022-09-29 2025-11-25 中国恩菲工程技术有限公司 Automatic control system for washing and separating ternary lithium-ion battery precursors and its usage method

Similar Documents

Publication Publication Date Title
CN208275059U (en) A kind of high energy scrubber of the positive persursor material of lithium electricity
CN104358176B (en) A kind of mthod of white water from paper making recovery system
CN212731313U (en) Flat-disc filter
CN109967446A (en) A kind of coal production cleaned coal dehydration reclaimer
CN214262945U (en) Sand washing barrel for sand washing equipment
CN107675772B (en) An automatic drainage system for flushing the sediment in the oil tank area
CN205627610U (en) Two alkaline process desulfurization system
CN208018273U (en) A kind of slag-soil truck cleaning waste water circulation utilized device
CN207727720U (en) A kind of engineering drainage device easy to use
CN208743211U (en) A kind of mining ore cleaning device
CN218709266U (en) Organic wastewater treatment device
CN219579948U (en) Assembled self-flushing ash precipitation device
CN210772250U (en) High-pressure back-flushing type scraper slag conveyor for power plant
CN204079745U (en) A kind of Novel stack spiral shell water extracter
CN213132280U (en) Water recycling system
CN211513552U (en) Efficient gravity type valveless filter
CN215276157U (en) Automatic flushing structure for environment-friendly and energy-saving construction site engineering truck
CN209807087U (en) Discharging device of fruit and vegetable cleaning machine
CN112482513A (en) Environment-friendly washing basin capable of saving and recycling water resources
CN201660715U (en) Polysilicon raw material rinsing bath
CN112715624A (en) High-pressure cleaning device is used in goose processing
CN105858251B (en) A kind of P-hydroxybenzoic acid collection device
CN217745936U (en) High-efficient solid-liquid separation device for sewage treatment
CN218474928U (en) Circulating water filter
CN112121472A (en) An integrated system for precipitation and dehydration after coal washing

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20181225

CF01 Termination of patent right due to non-payment of annual fee