CN206940443U - A kind of calciner plant that high whiteness soft talcum is produced using black talc - Google Patents
A kind of calciner plant that high whiteness soft talcum is produced using black talc Download PDFInfo
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- CN206940443U CN206940443U CN201720759308.3U CN201720759308U CN206940443U CN 206940443 U CN206940443 U CN 206940443U CN 201720759308 U CN201720759308 U CN 201720759308U CN 206940443 U CN206940443 U CN 206940443U
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- rotating cylinder
- oxygen
- oxygen supply
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- discharging
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Abstract
A kind of calciner plant that high whiteness soft talcum is produced using black talc, including：Feeding mechanism, rotary kiln and discharging mechanism；The rotating cylinder of rotary kiln horizontally rotates setting, including feed zone, bringing-up section and discharging section；Feed zone is connected with feeding mechanism, and discharging section is connected with discharging mechanism；Rotary kiln includes combustion chamber, for heating the calcining of the powdery black talc raw material in bringing-up section；Also include oxygen supply circle, be sheathed on outside feed zone, there is oxygen intake and oxygen chamber；Multiple oxygen supply blast caps are provided with rotating cylinder, oxygen outlet is set on oxygen supply blast cap, are set with oxygen supply circle gas connection.The utility model oxidizing atmosphere low temperature calcination, talcum not phase transformation and whiteness are high.
Description
Technical field
The utility model is related to the black talc mineral manufacture field in nonmetallic ore, and in particular to using black talc for original
Material, produce the calciner plant of high whiteness soft talcum.
Background technology
Black talc is the general designation to black, grey black talcum, includes the main reason for organic matter is its blackening.Black talc
In essential mineral be talcum, its content is more than 92%, in addition containing 5% or so quartz and 2% or so organic matter.China
Black talc resource very abundant, the ore deposit point currently verified are mainly distributed on the ALFISOL IN CENTRAL and southwest in China, proportionately ore deposit
Geologic feature can be divided into regional metamorphism type, hydrothermal metasomatism type and weathering appositional pattern three major types type.
For stone is whitened, the purposes limitation of black talc is big, so price is relatively low.The price of talcum is mainly white by its
Degree and hardness determines, its application of whiteness is higher, hardness is lower talcum is more extensive, so price is higher.But whiten stone
Resource is more rare, therefore whitens stone by the way of being calcined to black talc to obtain mostly at present.It is now widely available
Calcining technology be that black talc is milled to 200 ~ 325 mesh, then cylindrical or square block is made, and in annular kiln with 900 ~
1150 DEG C of temperature carries out 8 ~ 24h of calcining（Or the longer time）, its whiteness is 75% ~ 85% after cooling, is finally milled again to 325 mesh
Sale.
At present, the carbon of domestic relatively conventional black talc mine is thin in high rotten carbon, disseminated grain size.By above-mentioned existing
Black talc can be made to bleach although brightening calcine technology, because calcining heat is higher, and talcum can be sent out when more than 850 DEG C
Raw phase transformation generation enstatite, enstatite will be fully converted into more than 950 DEG C times more than 0.5h.
Therefore, the product after calcining has not been anatase structure by mineralogical analysis, and has been changed into high stupid of hardness
Fiery pyroxene（Mohs' hardness 5.5）, lose talcum（Mohs' hardness 1）Hardness is low, greasy feeling is good, lubricity is good and helps stream good etc.
Feature, so as to lose it is many require using talcum characteristic field applications, as plastics, medicine, food, cosmetics, coating,
The application of the industries such as paint, papermaking, waterproof material, it is set to lose the due value of talcum.In addition, prior art is in order to improve
Whiteness, brightening agent generally can be all added, not only effect is general, can also etching apparatus.
Therefore, how to solve above-mentioned the shortcomings of the prior art, become as the class to be researched and solved of the utility model
Topic.
The content of the invention
The purpose of this utility model is to provide a kind of calciner plant that high whiteness soft talcum is produced using black talc.
To reach above-mentioned purpose, the technical solution adopted in the utility model is：
A kind of calciner plant that high whiteness soft talcum is produced using black talc, including in the horizontal direction from front to back according to
Feeding mechanism, rotary kiln and the discharging mechanism of secondary setting；
Wherein, the rotary kiln has single-revolution cylinder, rotating cylinder accumbency in the horizontal direction, and turns along its center line
It is dynamic to set；The rotating cylinder includes feed zone, bringing-up section and discharging section successively from front to back；
The feed zone of the rotating cylinder is connected with the feeding mechanism, the discharging section of the rotating cylinder and the discharging
Mechanism is connected with；Powdery black talc raw material is sent into the feed zone by the feeding mechanism, and the bringing-up section through the rotating cylinder is forged
Turn into talc product after burning, then the discharging mechanism is moved to by the discharging section, and complete to discharge by the discharging mechanism；
The rotary kiln also includes a combustion chamber, and the bringing-up section of the rotating cylinder is arranged in the combustion chamber；It is described
Combustion chamber is used to heat the bringing-up section, and then the powdery black talc raw material in the bringing-up section is calcined；
Wherein, the rotary kiln also includes an oxygen supply circle, and the oxygen supply circle is annularly sheathed on entering for the rotating cylinder
Expect outside section；The oxygen supply circle is fixed with respect to ground, and the rotating cylinder rotates the inner side for being arranged at the oxygen supply circle, and described
The outer wall of the outer wall of rotating cylinder and the oxygen supply circle is tightly connected；Wherein, the oxygen supply circle has an oxygen intake, the oxygen
Entrance connects the oxygen chamber inside the oxygen supply circle；The inwall of the rotating cylinder corresponds to the oxygen chamber and is arranged at intervals
Have multiple oxygen supply blast caps, each oxygen supply blast cap along rotating cylinder circumferentially, and towards the inside of the rotating cylinder
Extension；Also, an oxygen outlet is offered backward on each oxygen supply blast cap, the barrel that the oxygen outlet passes through the rotating cylinder
On the oxygen chamber gas connection of the stomata that opens up and the oxygen supply circle set.
Relevant content in above-mentioned technical proposal is explained as follows：
1. in such scheme, by the horizontal accumbency of the rotating cylinder and setting is rotated, so as to the black cunning in rotating cylinder
Stone raw material thermally equivalent.
2. in such scheme, " oxygen intake connects the oxygen chamber inside the oxygen supply circle ", for introducing height
The oxygen of pressure high concentration is into the oxygen chamber." the gas that oxygen outlet opens up on the barrel by the rotating cylinder
The oxygen chamber gas connection of hole and the oxygen supply circle is set ", for by the oxygen of high pressure high concentration from the oxygen chamber
In be injected into rotating cylinder, make to form oxidizing atmosphere in rotating cylinder.
3. in such scheme, described " offering an oxygen outlet on oxygen supply blast cap backward ", the purpose opened up backward is
The black talc raw material moved from front to back in rotating cylinder is avoided, in order to avoid blocking oxygen outlet, avoids causing rotating cylinder internal oxidition
Atmosphere is not up to standard.
4. in such scheme, multiple lifting blades are arranged at intervals with the inwall of the rotating cylinder bringing-up section, it is each described to raise
Flitch along rotating cylinder circumferentially, and towards the rotating cylinder inside extend；
Wherein, the outer end of the lifting blade is fixedly arranged on the inwall of the rotating cylinder, the lifting blade it is inner formed with
One crook, and the crook is set towards the rotation direction of the rotating cylinder, is designed whereby, when rotating cylinder rotates,
Each lifting blade is constantly kicked up powdery black talc raw material in suspension by crook, is not only added beneficial to the uniform of raw material
Heat, the oxygen being more conducive to fully in contact cylinder are fully calcined to realize.
5. in such scheme, the feeding mechanism includes a charging aperture, and be correspondingly arranged in below the charging aperture one
First screw feeding bar, first screw feeding bar are horizontally disposed with, for the powdery black talc that will be put into by the charging aperture
Raw water horizontal sliding is delivered in the feed zone of the rotating cylinder；
The discharging mechanism includes a discharging opening, and is correspondingly arranged in one second screw feeding below the discharging opening
Bar, second screw feeding bar are horizontally disposed with, for the talc product level in the discharging section of the rotating cylinder to be pushed out
Material.
6. in such scheme, in addition to supporting part, support roller portion, pedestal and drive mechanism；The supporting part is fixedly arranged on ground
Face, the upper end of supporting part are fixedly connected with the pedestal；The support roller portion is fixedly arranged on the pedestal, and is returned described in rotational support
Drum body；The drive mechanism drive connection support roller portion, for driving the rotating cylinder to be rotated.
7. in such scheme, the discharging section that the rotary kiln corresponds to the rotating cylinder is additionally provided with a hood, the exhaust
Cover on the outside of the discharging section, and connected with the discharging section gas circuit, for discharging in calcination process in rotating cylinder
Caused waste gas；
Also, the outer wall of the outer wall of the hood and the rotating cylinder is tightly connected, to ensure in rotating cylinder
Waste gas only discharged by waste gas outlet on hood, other gases will not be produced and returned, and then kept in rotating cylinder
Atmosphere.
Utility model works principle and advantage are as follows：
Mainly by setting an oxygen supply circle, the oxygen supply circle is annularly sheathed on outside the feed zone of rotating cylinder the utility model
Portion, the oxygen intake of oxygen supply circle connects the oxygen chamber inside oxygen supply circle, for being introduced into high density and high pressure oxygen into oxygen chamber；
Meanwhile the inwall of rotating cylinder is provided with multiple oxygen supply blast caps, oxygen outlet is offered on each oxygen supply blast cap, each oxygen outlet is by returning
The oxygen chamber gas connection of stomata and oxygen supply circle in drum body is set, for high density and high pressure oxygen to be injected from oxygen supply circle
Into rotating cylinder, make to form oxidizing atmosphere in rotating cylinder.
Compared to existing technologies, the utility model is by black talc feed particles ultra fine, it is ultra-fine after powdery it is black
Talcum uses oxidizing atmosphere low temperature calcination in calciner plant, makes carbon of the talcum in black talc is burnt up on the premise of not producing phase transformation
Element, obtain high whiteness（≥80%）Talcum mineral facies superfine talcum powder.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment calciner plant；
Accompanying drawing 2 is Q directions view in Fig. 1；
Accompanying drawing 3 is A-A profile structure diagram in Fig. 1；
Accompanying drawing 4 is B-B cross-section structure diagram in Fig. 1；
Accompanying drawing 5 is H directions view in Fig. 1；
Accompanying drawing 6 is partial enlarged drawing at I in Fig. 1；
Accompanying drawing 7 is partial enlarged drawing at III in Fig. 3；
Accompanying drawing 8 is partial enlarged drawing at II in Fig. 1.
In the figures above：1. feeding mechanism；2. rotary kiln；3. discharging mechanism；4. rotating cylinder；5. feed zone；6. heating
Section；7. discharging section；8. combustion chamber；9. oxygen supply circle；10. oxygen intake；11. oxygen chamber；12. oxygen supply blast cap；13. oxygen outlet；
14. lifting blade；15. crook；16. charging aperture；17. the first screw feeding bar；18. discharging opening；19. the second screw feeding bar；
20. supporting part；21. support roller portion；22. pedestal；23. drive mechanism；24. hood；25. waste gas outlet；26. combustion nozzle system；27.
Airtight and watertight padding；28. stomata.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the utility model：
Embodiment：As shown in Figure 1, 2, the calciner plant includes the charger set gradually from front to back in the horizontal direction
Structure 1, rotary kiln 2 and discharging mechanism 3；
The rotary kiln 2 has single-revolution cylinder 4, the accumbency in the horizontal direction of rotating cylinder 4, and is rotated along its center line
Set；The rotating cylinder 4 includes feed zone 5, bringing-up section 6 and discharging section 7 successively from front to back；Pass through the rotating cylinder
4 horizontal accumbency simultaneously rotate setting, so as to the black talc raw material thermally equivalent in rotating cylinder 4.
The feed zone 5 of the rotating cylinder 4 is connected with the feeding mechanism 1, the discharging section 7 of the rotating cylinder 4 and institute
Discharging mechanism 3 is stated to be connected with；Powdery black talc raw material is sent into the feed zone 5 by the feeding mechanism 1, through the rotating cylinder 4
Bringing-up section 6 calcine after turn into talc product, then the discharging mechanism 3 is moved to by the discharging section 7, and pass through the discharging
Mechanism 3 completes discharging；
The rotary kiln 2 includes a combustion chamber 8, and the bringing-up section 6 of the rotating cylinder 4 is arranged in the combustion chamber 8；Institute
State combustion chamber 8 to be used to heat the bringing-up section 6, the powdery black talc raw material in the bringing-up section 6 is entered by combustion nozzle system 26
Row calcining（See Fig. 4）.
As shown in figure 3, the rotary kiln 2 also includes an oxygen supply circle 9, the oxygen supply circle 9 is annularly sheathed on the revolution
Outside the feed zone 5 of cylinder 4；The oxygen supply circle 9 is fixed with respect to ground, and the rotating cylinder 4 rotates and is arranged at the oxygen supply circle 9
Inner side, and the outer wall of the outer wall of the rotating cylinder 4 and the oxygen supply circle 9 is tightly connected by airtight and watertight padding 27（See Fig. 6）；
Wherein, the oxygen supply circle 9 has an oxygen intake 10, and the oxygen intake 10 connects the oxygen chamber inside the oxygen supply circle 9
11, for introducing the oxygen of high pressure high concentration；
As shown in figure 3, the inwall of the rotating cylinder 4, which corresponds to the oxygen chamber 11, is arranged at intervals with multiple oxygen supply blast caps
12, each oxygen supply blast cap 12 in a tubular form, and prolongs along rotating cylinder 4 circumferentially towards the inside of the rotating cylinder 4
Stretch；Also, as shown in fig. 7, offering an oxygen outlet 13 backward on each oxygen supply blast cap 12, the oxygen outlet 13 is by described
The gas connection of oxygen chamber 11 of the stomata 28 that is opened up on the barrel of rotating cylinder 4 and the oxygen supply circle 9 is set, for by high pressure
In the oxygen injection rotating cylinder 4 of power high concentration, make to form oxidizing atmosphere in rotating cylinder 4.The oxygen outlet 13 opens up backward
Purpose in the black talc raw material moved from front to back in rotating cylinder 4 is avoided, in order to avoid blocking oxygen outlet 13, avoid causing back
The internal oxidition atmosphere of drum body 4 is not up to standard.
It is each described to raise as shown in figure 4, be arranged at intervals with multiple lifting blades 14 on the inwall of the bringing-up section 6 of rotating cylinder 4
Flitch 14 along rotating cylinder 4 circumferentially, and towards the rotating cylinder 4 inside extend；Outside the lifting blade 14
End is fixedly arranged on the inwall of the rotating cylinder 4, and the inner of the lifting blade 14 is formed with a crook 15, and the court of crook 15
To the rotation direction of the rotating cylinder 4（Rotate counterclockwise）Set, design whereby, when rotating cylinder 4 rotates, it is each described in raise
Flitch 14 is constantly kicked up powdery black talc raw material in suspension by crook 15, not only beneficial to the uniform heating of raw material, more
It is fully calcined to realize beneficial to the oxygen in abundant contact Rotating cylinder 4.
Wherein, as shown in Fig. 2 the feeding mechanism 1 includes a charging aperture 16, and it is correspondingly arranged under the charging aperture 16
One first screw feeding bar 17 of side, first screw feeding bar 17 is horizontally disposed, is put into for that will pass through the charging aperture 16
Powdery black talc raw water horizontal sliding deliver in the feed zone 5 of the rotating cylinder 4；
As shown in figure 5, the discharging mechanism 3 includes a discharging opening 18, and it is correspondingly arranged in the lower section of discharging opening 18
One second screw feeding bar 19, second screw feeding bar 19 is horizontally disposed, for by the discharging section 7 of the rotating cylinder 4
The horizontal push discharging of talc product.
Wherein, in addition to supporting part 20, support roller portion 21, pedestal 22 and drive mechanism 23；The supporting part 20 is fixedly arranged on
Ground, the upper end of supporting part 20 are fixedly connected with the pedestal 22；The support roller portion 21 is fixedly arranged on the pedestal 22, and is rotated
Support the rotating cylinder 4；The drive mechanism 23 is connected the support roller portion 21, for driving the rotating cylinder 4 to enter
Row rotates.The drive mechanism 23 can use form of the motor with driving chain or the ability with said function
Other drive mechanisms known to field technique personnel.
Wherein, as shown in figure 5, the discharging section 7 of the corresponding rotating cylinder 4 of the rotary kiln 2 is additionally provided with a hood 24,
The hood 24 covers at the outside of discharging section 7, and is connected with the gas circuit of discharging section 7, for discharging in calcination process
Caused waste gas in rotating cylinder 4；
Also, as shown in figure 8, the outer wall of the outer wall of the hood 24 and the rotating cylinder 4 passes through airtight and watertight padding 27
It is tightly connected, to ensure that the waste gas in rotating cylinder 4 is only discharged by the waste gas outlet 25 on hood 24, it will not be produced
He returns gas, and then keeps the atmosphere in rotating cylinder 4.
Now the operation principle of the present apparatus is described as follows：
With rotary kiln 2 for calciner plant main body, the rotating cylinder 4 of rotary kiln 2, which rotates, to be set, the bringing-up section 6 of rotating cylinder 4
It is arranged in combustion chamber 8, makes the temperature control of combustion chamber 8 in combustion chamber 8 by burning gases or liquid fuel at 200 ~ 850 DEG C
Scope, the bringing-up section 6 of uniform heating rotary cylinder 4.Feeding mechanism 1 provides the first screw feeding bar 17 and supplied into rotating cylinder 4
Material（Powdery black talc raw material）, material sealing rotating cylinder 4, make external seal in rotating cylinder 4.Oxygen supply circle 9 is sealed in revolving drum
Outside body 4, into rotating cylinder 4, malleation is oxygenated.Under malleation oxygen-enriched atmosphere of the black talc raw material in rotating cylinder 4, by returning
The thermally equivalent of drum body 4 makes black talc raw material in cylinder that oxidation reaction occur with oxygen, generates carbon dioxide, reaches except de-black is slided
The purpose of carbonaceousfuel component in stone, make black talc become to whiten stone, and do not generate enstatite.
For above-described embodiment only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement according to this, the scope of protection of the utility model can not be limited with this.
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover the scope of protection of the utility model it
It is interior.
Claims (4)
- A kind of 1. calciner plant that high whiteness soft talcum is produced using black talc, it is characterised in that：Including the feeding mechanism, rotary kiln and discharging mechanism set gradually from front to back in the horizontal direction；Wherein, the rotary kiln has single-revolution cylinder, rotating cylinder accumbency in the horizontal direction, and rotates and set along its center line Put；The rotating cylinder includes feed zone, bringing-up section and discharging section successively from front to back；The feed zone of the rotating cylinder is connected with the feeding mechanism, the discharging section of the rotating cylinder and the discharging mechanism It is connected with；Powdery black talc raw material is sent into the feed zone by the feeding mechanism, after the heating section calcining of the rotating cylinder As talc product, then the discharging mechanism is moved to by the discharging section, and passes through the discharging mechanism and complete discharging；The rotary kiln also includes a combustion chamber, and the bringing-up section of the rotating cylinder is arranged in the combustion chamber；The burning Room is used to heat the bringing-up section, and then the powdery black talc raw material in the bringing-up section is calcined；Wherein, the rotary kiln also includes an oxygen supply circle, and the oxygen supply circle is annularly sheathed on the feed zone of the rotating cylinder It is outside；The oxygen supply circle is fixed with respect to ground, and the rotating cylinder rotates the inner side for being arranged at the oxygen supply circle, and the revolution The outer wall of the outer wall of cylinder and the oxygen supply circle is tightly connected；Wherein, the oxygen supply circle has an oxygen intake, the oxygen intake Connect the oxygen chamber inside the oxygen supply circle；The inwall of the rotating cylinder correspond to the oxygen chamber be arranged at intervals with it is more Individual oxygen supply blast cap, each oxygen supply blast cap along rotating cylinder circumferentially, and towards the rotating cylinder inside extend； Also, an oxygen outlet is offered backward on each oxygen supply blast cap, the oxygen outlet is opened on the barrel by the rotating cylinder If the oxygen chamber gas connection of stomata and the oxygen supply circle set.
- 2. calciner plant according to claim 1, it is characterised in that：It is spaced and sets on the inwall of the rotating cylinder bringing-up section It is equipped with multiple lifting blades, each lifting blade circumferentially, and prolongs along rotating cylinder towards the inside of the rotating cylinder Stretch；Wherein, the outer end of the lifting blade is fixedly arranged on the inwall of the rotating cylinder, and the inner of the lifting blade is formed with a hook Shape portion, and the crook is set towards the rotation direction of the rotating cylinder.
- 3. calciner plant according to claim 1, it is characterised in that：The feeding mechanism includes a charging aperture, and right One first screw feeding bar that should be arranged at below the charging aperture, first screw feeding bar is horizontally disposed with, for that will pass through institute The powdery black talc raw water horizontal sliding that charging aperture is put into is stated to deliver in the feed zone of the rotating cylinder；The discharging mechanism includes a discharging opening, and is correspondingly arranged in one second screw feeding bar below the discharging opening, should Second screw feeding bar is horizontally disposed with, for the horizontal push of talc product in the discharging section of the rotating cylinder to be discharged.
- 4. calciner plant according to claim 1, it is characterised in that：Also include supporting part, support roller portion, pedestal and driving Mechanism；The supporting part is fixedly arranged on ground, and the upper end of supporting part is fixedly connected with the pedestal；The support roller portion is fixedly arranged on described On pedestal, and rotating cylinder described in rotational support；The drive mechanism drive connection support roller portion, for driving the revolution Cylinder is rotated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720759308.3U CN206940443U (en) | 2017-06-27 | 2017-06-27 | A kind of calciner plant that high whiteness soft talcum is produced using black talc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720759308.3U CN206940443U (en) | 2017-06-27 | 2017-06-27 | A kind of calciner plant that high whiteness soft talcum is produced using black talc |
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| Publication Number | Publication Date |
|---|---|
| CN206940443U true CN206940443U (en) | 2018-01-30 |
Family
ID=61367395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720759308.3U Withdrawn - After Issue CN206940443U (en) | 2017-06-27 | 2017-06-27 | A kind of calciner plant that high whiteness soft talcum is produced using black talc |
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| Country | Link |
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| CN (1) | CN206940443U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140655A (en) * | 2017-06-27 | 2017-09-08 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of utilization black talc produces the calcine technology and device of high whiteness soft talcum |
| CN109179432A (en) * | 2018-09-27 | 2019-01-11 | 内蒙古超牌建材科技有限公司 | Low calcium calcines black talc production equipment, low calcium calcining black talc and preparation method thereof |
-
2017
- 2017-06-27 CN CN201720759308.3U patent/CN206940443U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140655A (en) * | 2017-06-27 | 2017-09-08 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of utilization black talc produces the calcine technology and device of high whiteness soft talcum |
| CN107140655B (en) * | 2017-06-27 | 2023-08-01 | 苏州中材非金属矿工业设计研究院有限公司 | Calcination process and device for producing high-whiteness low-hardness talcum by using black talcum |
| CN109179432A (en) * | 2018-09-27 | 2019-01-11 | 内蒙古超牌建材科技有限公司 | Low calcium calcines black talc production equipment, low calcium calcining black talc and preparation method thereof |
| CN109179432B (en) * | 2018-09-27 | 2020-03-13 | 内蒙古超牌建材科技有限公司 | Low-calcium calcined black talc production equipment, low-calcium calcined black talc and preparation method thereof |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230801 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230801 |
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| AV01 | Patent right actively abandoned |