CN203848656U - Wet rotary kiln for permanent magnetic ferrite pre-burned clinker - Google Patents
Wet rotary kiln for permanent magnetic ferrite pre-burned clinker Download PDFInfo
- Publication number
- CN203848656U CN203848656U CN201420288180.3U CN201420288180U CN203848656U CN 203848656 U CN203848656 U CN 203848656U CN 201420288180 U CN201420288180 U CN 201420288180U CN 203848656 U CN203848656 U CN 203848656U
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- kiln body
- drying
- section
- wet process
- 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
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 36
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910000746 Structural steel Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000005453 pelletization Methods 0.000 abstract 5
- 238000010792 warming Methods 0.000 abstract 4
- 230000000694 effects Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model discloses a wet rotary kiln for permanent magnetic ferrite pre-buried clinker, and belongs to the technical field of ferrite pre-burned clinker rotary kilns. The wet rotary kiln comprises a rotary kiln body, a baffle, a feed inlet and a burner. The rotary kiln body is of a cylindrical structure and comprises a drying pelletizing section and a warming roasting section. The front end of the drying pelletizing section is provided with the feed inlet, the inner side wall of the drying pelletizing section is provided with the baffle, the baffle is spirally distributed on the inner side wall of the drying pelletizing section, the rear end of the warming roasting section is provided with a discharge outlet, the burner is installed on the discharge outlet, the inner side wall of the warming roasting section is provided with a fireproof layer in a laying mode, the length of the drying pelletizing section accounts for one third to one second of the whole length of the rotary kiln body, the length of the warming roasting section accounts for one second to two thirds of the whole length of the rotary kiln body, and the ratio of the whole length to the inner diameter of the rotary kiln body ranges from 15 to 20. Compared with an existing wet rotary kiln with the same inner diameter and length as the wet rotary kiln, the productivity can be improved by 30%, and the energy consumption level of a dry rotary kiln can be achieved.
Description
Technical field
The utility model relates to a kind of wet process rotary kiln, belongs in particular the technical field of permanent ferrite prefiring material rotary kiln.
Background technology
Permanent-magnet ferrite production process comprises the master operations such as batching, pre-burning, pulverizing, fine grinding, moulding, sintering and mill processing.Pre-burning divides two kinds of dry method and wet methods, and the pre-burning of high-performance permanent magnetic ferrite material generally selects wet process rotary kiln to carry out pre-burning.Energy consumption that conventional wet rotary kiln major defect shows as specific yield is high, cost is high.In order to reduce specific energy consumption, can adopt the method that improves charging pulp density, by centrifugal dehydration or filter-press dehydration, improve pulp density, the upper limit that present stage dehydration concentration can reach is 60%～70%.Although the method to a certain extent, played the effect that reduces specific energy consumption, but because the feature of the too high high viscosity having of pulp density, free settling, make it enter agglomerating being heated after wet process rotary kiln, easily be heated inhomogeneous, heat-transfer effect is bad, produce agglomerating surperficial the slip excessive and agglomerating inner slip that is heated and be heated insufficiently, or agglomerating high concentration ground paste is fast by rotary kiln, the fully problem of pre-burning.
China Patent No. 96119442.1, the applying date: on September 24th, 1996, invention and created name is ferrite prefiring material rotary kiln, includes the cylindrical shell of two inclinations in this patent, have coaxial line, and the next linking is upper; The support roller of cylindrical shell, active roller station is connected with transmission device, the reciprocal rotation of cylindrical shell, its frequency and the amplitude of oscillation are adjustable; Fire-resistant kiln lining surface on stockline scribbles black matrix layer; In cylindrical shell, in kiln thorax, have silicon carbon rod, and the spacing of the ratio low-temperature zone of high temperature section is large; There is the fire-resistant kiln lining endosexine at temperature flex point place, temperature thermocouple is housed; Upper cylindrical shell has apparatus of oxygen supply.This rotary kiln is in kiln body turning course, and the flow velocity of ferrite in kiln body is too fast, and ferrite prefiring material retention time in kiln body is shorter, is unfavorable for the pre-burning of ferrite prefiring material.
China Patent No. 200820082664.7, January 22 2008 applying date, invention and created name is wet process rotary kiln, this patent comprises kiln body, kiln body from entrance point to the downward-sloping setting of the port of export, kiln intracoelomic cavity between entrance point and the port of export is by the first isometrical chamber, the second isometrical chamber and chamber, C grade footpath form, wherein, the diameter in the first isometrical chamber is greater than the diameter in the second isometrical chamber, the diameter in the second isometrical chamber is greater than the diameter in chamber, C grade footpath, between the first isometrical chamber and the second isometrical chamber, pass through the first annular step transition, between the second isometrical chamber and chamber, C grade footpath, pass through the second ring-shaped step transition.This patent has solved the problems such as the pre-burning that is unfavorable for ferrite prefiring material that existing ferrite prefiring material rotary kiln exists and cleaning to a certain extent, but this patent just slows down slip flow velocity by the ring-shaped step between three isometrical chambeies, do not solve the slip inhomogeneous problem of being heated, energy consumption is higher, and because three isometrical chamber diameters are different, make this rotary structure complicated, install and use and maintenance process in all make troubles.
Utility model content
1. the technical problem that utility model will solve
The utility model is the deficiency in existence aspect pre-burning cost and efficiency for current high performance permanent-magnet ferrite, and there is the inhomogeneous technical problem of being heated while heating in wet process rotary kiln in high concentration ground paste, a kind of permanent ferrite prefiring material wet process rotary kiln is provided, solved slip that in prior art, wet process rotary kiln exists be heated inequality, heat-transfer effect is bad, pre-burning cost is high, production efficiency is low technical problem.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
A kind of permanent ferrite prefiring material wet process rotary kiln of the present utility model, comprise rotary kiln body, baffle plate, charging aperture and burner, rotary kiln body is cylinder-like structure, this rotary kiln body comprises drying and granulating section and intensification furnace zone, the front end of drying and granulating section offers charging aperture, on the madial wall of this drying and granulating section, baffle plate is installed, this baffle plate is distributed on the madial wall of drying and granulating section in the shape of a spiral; The rear end of intensification furnace zone offers discharging opening, and this discharging opening place is provided with burner, intensification furnace zone madial wall on built flame retardant coating by laying bricks or stones; Drying and granulating segment length accounts for 1/3～1/2 of rotary kiln body overall length, and intensification furnace zone accounts for 1/2～2/3 of rotary kiln body overall length, and the overall length of this rotary kiln body is 15～20 with internal diameter ratio.
As of the present utility model, further improve, drying and granulating section material is stainless steel 2520; Intensification furnace zone outer tube wall material is Q235 carbon structural steel, and the material of flame retardant coating is alumina firebrick.
As of the present utility model, further improve, kiln body angle of inclination is 1～2 °, and wherein drying and granulating section, higher than intensification furnace zone, is convenient to slip flowing in kiln body.
As of the present utility model, further improve, kiln body angle of inclination is 1.5 °, slip being heated and discharging best results in kiln body.
As of the present utility model, further improve, the baffle plate of installing on drying and granulating section madial wall is equidistant arrangement.
3. beneficial effect
The technical scheme that adopts the utility model to provide, compared with prior art, has following beneficial effect:
(1) a kind of permanent ferrite prefiring material wet process rotary kiln of the present utility model, its rotary kiln drying granulation section madial wall is provided with baffle plate, can advance uniformly slip, and the agglomerating of high concentration ground paste can be broken up, play the effect of certain stirring slip, slip is heated evenly, solved agglomerating surperficial the slip excessive and agglomerating inner slip that is heated and be heated insufficient, or agglomerating high concentration ground paste is fast by rotary kiln, the fully problem of pre-burning.
(2) a kind of permanent ferrite prefiring material wet process rotary kiln of the present utility model, its drying and granulating segment length accounts for 1/3～1/2 of rotary kiln body overall length, larger than the drying and granulating section proportion length of general wet process rotary kiln, slip is heated more abundant.
(3) a kind of permanent ferrite prefiring material wet process rotary kiln of the present utility model, drying and granulating section material is stainless steel 2520, and heat-transfer effect is good, and slip is heated fully, pre-burning cost.
(4) a kind of permanent ferrite prefiring material wet process rotary kiln of the present utility model, the outer tube wall material of its intensification furnace zone is Q235 carbon structural steel, the inside alumina firebrick of inlaying, slip high insulating effect, shorten drying time, and production efficiency improves.
(5) the utility model reasonable in design, principle is simple, is convenient to promote the use of.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of permanent ferrite prefiring material wet process rotary kiln of the present utility model.
Label declaration in schematic diagram:
1, drying and granulating section; 2, intensification furnace zone; 3, baffle plate; 4, flame retardant coating; 5, charging aperture; 6, burner.
The specific embodiment
For further understanding content of the present utility model, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.
Embodiment 1
As shown in Figure 1, a kind of permanent ferrite prefiring material wet process rotary kiln of the present embodiment, comprises rotary kiln body, also comprises baffle plate 3, charging aperture 5 and burner 6.Described rotary kiln body is cylinder-like structure, this rotary kiln body comprises drying and granulating section 1 and intensification furnace zone 2, the front end of drying and granulating section 1 offers charging aperture 5, baffle plate 3 is installed on the madial wall of this drying and granulating section 1, this baffle plate 3 is equidistantly distributed on the madial wall of drying and granulating section 1 in the shape of a spiral, ingenious property setting due to baffle plate, can advance uniformly slip, and the agglomerating of high concentration ground paste can be broken up, play the effect of certain stirring slip, slip is heated evenly, having solved agglomerating surperficial the slip excessive and agglomerating inner slip that is heated is heated insufficient, or agglomerating high concentration ground paste passes through rotary kiln fast, the abundant problem of pre-burning.Specifically in the present embodiment, be arranged on the baffle plate 3 of drying and granulating section 1 for detachable, after long use, baffle plate 3 has wearing and tearing unavoidably, and detachable design makes the replacing of baffle plate 3 safeguard convenient.The material of drying and granulating section 1 is stainless steel 2520, and heat-transfer effect is good, and slip is heated fully, pre-burning cost.The rear end of intensification furnace zone 2 offers discharging opening, and this discharging opening place is provided with burner 6, has built flame retardant coating 4 on the madial wall of intensification furnace zone 2 by laying bricks or stones; The outer tube wall material of described intensification furnace zone 2 is Q235 carbon structural steel, and the material of flame retardant coating 4 is alumina firebrick again, makes slip high insulating effect, and shorten drying time, and production efficiency improves.The present embodiment is in order to improve automatic control level, in drying and granulating section 1, the first temperature sensor and the first pressure sensor are installed, at intensification furnace zone 2, the second temperature sensor and the second pressure sensor are installed, the first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor are all connected with control system, by this control system, can directly learn temperature and the barometric information of inner each section of rotary kiln, conveniently make in time technique adjustment.
Drying and granulating section 1 length of the present embodiment accounts for 1/3 of rotary kiln body overall length, and intensification furnace zone 2 accounts for 2/3 of rotary kiln body overall length, and the overall length of this rotary kiln body is 15 with internal diameter ratio; Described rotary kiln body is inclined, and whole inclination angle is 1 °, and drying and granulating section 1 is higher than intensification furnace zone 2.
Embodiment 2
A kind of permanent ferrite prefiring material wet process rotary kiln of the present embodiment, its basic structure is with embodiment 1, difference is: drying and granulating section 1 length in the present embodiment accounts for 1/2 of rotary kiln body overall length, intensification furnace zone 2 accounts for 1/2 of rotary kiln body overall length, and the overall length of this rotary kiln body is 20 with internal diameter ratio; Kiln body is inclined, and whole inclination angle is 2 °, and drying and granulating section 1 is higher than intensification furnace zone 2.
Embodiment 3
A kind of permanent ferrite prefiring material wet process rotary kiln of the present embodiment, its basic structure is with embodiment 1, difference is: drying and granulating section 1 length in the present embodiment accounts for 5/12 of rotary kiln body overall length, intensification furnace zone 2 accounts for 7/12 of rotary kiln body overall length, and the overall length of this rotary kiln body is 18 with internal diameter ratio; Kiln body is inclined, and whole inclination angle is 1.5 °, and drying and granulating section 1 is higher than intensification furnace zone 2.
A kind of permanent ferrite prefiring material wet process rotary kiln of embodiment 1～3, during whole device operation, burner 6 first heats up to whole wet process rotary kiln, be warmed up to after the required temperature of technique, slip enters into wet process rotary kiln drying and granulating section 1 by charging aperture 5, because whole kiln body has inclination angle, and drying and granulating section 1 is higher than intensification furnace zone 2, under the effect of Action of Gravity Field and baffle plate 3, slip is interior slowly the advancing at the uniform velocity of wet process rotary kiln drying and granulating section 1, be delivered to wet process rotary kiln intensification furnace zone 2 always, slip moves to rotary kiln discharging opening slowly under Action of Gravity Field in intensification furnace zone 2, until discharging.Because the utility model rotary kiln drying granulation section 1 madial wall is provided with baffle plate 3, baffle plate 3 can advance slip uniformly, and plays the effect of certain stirring slip, slip is heated evenly, and drying and granulating section 1 material is stainless steel 2520, heat-transfer effect is good, and slip is heated fully.The external barrel material of intensification furnace zone 2 kiln is Q235 carbon structural steel, the inside flame retardant coating 4 of inlaying, and flame retardant coating 4 materials are alumina firebrick, slip high insulating effect, shorten drying time.Measuring and calculating through technical staff, use the rotary kiln of this embodiment 1～3, than traditional rotary kiln production capacity, improve more than 30%, with 22 meters of the length of length same volume, the rotary kiln of 2 meters of diameters, by this utility model rotary kiln day production capacity, can reach 40 tons, and same volume only have 25 tons with the day production capacity of traditional rotary kiln of length.
Below schematically the utility model and embodiment thereof are described, this description does not have restricted, and shown in accompanying drawing is also one of embodiment of the present utility model, and actual structure is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that not departing from the utility model creation aim, without the creationary frame mode similar to this technical scheme and the embodiment of designing, all should belong to protection domain of the present utility model.
Claims (6)
1. a permanent ferrite prefiring material wet process rotary kiln, comprise rotary kiln body, charging aperture (5) and burner (6), described rotary kiln body is cylinder-like structure, this rotary kiln body comprises drying and granulating section (1) and intensification furnace zone (2), the front end of described drying and granulating section (1) offers charging aperture (5), the rear end of described intensification furnace zone (2) offers discharging opening, this discharging opening place is provided with burner (6), it is characterized in that: also comprise baffle plate (3), on the madial wall of described drying and granulating section (1), baffle plate (3) is installed, this baffle plate (3) is distributed on the madial wall of drying and granulating section (1) in the shape of a spiral, on the madial wall of described intensification furnace zone (2), built flame retardant coating (4) by laying bricks or stones, described drying and granulating section (1) length accounts for 1/3～1/2 of rotary kiln body overall length, and intensification furnace zone (2) accounts for 1/2～2/3 of rotary kiln body overall length, and the overall length of this rotary kiln body is 15～20 with internal diameter ratio.
2. a kind of permanent ferrite prefiring material wet process rotary kiln according to claim 1, is characterized in that: the material of described drying and granulating section (1) is stainless steel 2520.
3. a kind of permanent ferrite prefiring material wet process rotary kiln according to claim 1, is characterized in that: the outer tube wall material of described intensification furnace zone (2) is Q235 carbon structural steel, and the material of flame retardant coating (4) is alumina firebrick.
4. according to a kind of permanent ferrite prefiring material wet process rotary kiln described in claim 2 or 3, it is characterized in that: the angle of inclination of described rotary kiln body is 1～2 °, wherein drying and granulating section (1) is higher than intensification furnace zone (2).
5. a kind of permanent ferrite prefiring material wet process rotary kiln according to claim 4, is characterized in that: the angle of inclination of described rotary kiln body is 1.5 °.
6. a kind of permanent ferrite prefiring material wet process rotary kiln according to claim 5, is characterized in that: the baffle plate (3) on described drying and granulating section (1) madial wall is equidistantly spaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288180.3U CN203848656U (en) | 2014-05-30 | 2014-05-30 | Wet rotary kiln for permanent magnetic ferrite pre-burned clinker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288180.3U CN203848656U (en) | 2014-05-30 | 2014-05-30 | Wet rotary kiln for permanent magnetic ferrite pre-burned clinker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203848656U true CN203848656U (en) | 2014-09-24 |
Family
ID=51561663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420288180.3U Expired - Fee Related CN203848656U (en) | 2014-05-30 | 2014-05-30 | Wet rotary kiln for permanent magnetic ferrite pre-burned clinker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203848656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218801A (en) * | 2017-06-12 | 2017-09-29 | 南京新中磁电技术工程有限公司 | A kind of novel energy-conserving internal heat type wet process rotary kiln |
-
2014
- 2014-05-30 CN CN201420288180.3U patent/CN203848656U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218801A (en) * | 2017-06-12 | 2017-09-29 | 南京新中磁电技术工程有限公司 | A kind of novel energy-conserving internal heat type wet process rotary kiln |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107487994B (en) | Clinker cooler waste heat recovery rotary kiln oxygen supply system | |
| CN103754889B (en) | High-purity quartz sand purification method and special rotating device | |
| CN103234339B (en) | Device for ilmenite concentrate microwave drying and application method thereof | |
| CN102636021B (en) | Efficient and energy-saving magnetizing roasting rotary kiln | |
| CN104194809A (en) | Continuous microwave-heating cracking equipment for biomass and organic wastes | |
| CN204454890U (en) | Cement material pulverizes dry whipping appts | |
| CN103922355B (en) | A kind of device and preparation technology producing triphane | |
| CN203848656U (en) | Wet rotary kiln for permanent magnetic ferrite pre-burned clinker | |
| CN203928697U (en) | A kind of continuous powdery sintering rotary furnace | |
| CN203768043U (en) | Roasting transformation, distributing and cooling-recovery production device of spodumene | |
| CN204529316U (en) | Two section type graphitizing furnace equipment | |
| CN206593460U (en) | Continous way roller lithium cell cathode material heating furnace | |
| CN204039329U (en) | A kind of continuous-type microwave heating biological matter and organic waste cracking apparatus | |
| CN104673953B (en) | A kind of kiln device of multitube DRI and method | |
| CN203848657U (en) | High-concentration slurry preburning system for dehydrated permanent magnetic ferrite | |
| CN207006824U (en) | A kind of dynamic calcining equipment of powder body material | |
| CN105271353A (en) | Calcination method for raising daily output of rare earth carbonate | |
| CN106839759A (en) | Production line is automatically fired for producing magnetic material | |
| CN204478801U (en) | A kind of can from kiln the cement rotary kiln of more changeable liner | |
| CN204665880U (en) | Half-dried refractory powder drying device | |
| CN103396095A (en) | Lake sludge brick-making technology | |
| CN207877556U (en) | A kind of sludge solid waste high-efficiency heat pump dehumidifier | |
| CN203561157U (en) | Drying apparatus for production of ceramsite sands | |
| CN203550526U (en) | Cascading type rotary kiln | |
| CN203550450U (en) | Recycling and drying equipment for alkali-deweighting wastewater residues of printing and dyeing industry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140924 Termination date: 20210530 |