CN108344295A - A kind of novel rotary kiln of distributed heating - Google Patents
A kind of novel rotary kiln of distributed heating Download PDFInfo
- Publication number
- CN108344295A CN108344295A CN201710062389.6A CN201710062389A CN108344295A CN 108344295 A CN108344295 A CN 108344295A CN 201710062389 A CN201710062389 A CN 201710062389A CN 108344295 A CN108344295 A CN 108344295A
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- Prior art keywords
- areas
- warm
- shao
- burner
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- 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.)
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- 238000009826 distribution Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000003345 natural gas Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 239000008188 pellet Substances 0.000 abstract description 7
- 230000004069 differentiation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- NNGHIEIYUJKFQS-UHFFFAOYSA-L hydroxy(oxo)iron;zinc Chemical compound [Zn].O[Fe]=O.O[Fe]=O NNGHIEIYUJKFQS-UHFFFAOYSA-L 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- 206010057362 Underdose Diseases 0.000 description 1
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/10—Rotary-drum furnaces, i.e. horizontal or slightly inclined internally heated, e.g. by means of passages in the wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
- F27B7/3205—Charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/34—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
- F27B2007/3282—Details
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a kind of novel rotary kilns of distributed heating,It include the blanking bin for blanking,Material in the blanking bin enters the areas Dai Shao by expects pipe,The baffle for control material amount is equipped in the areas Dai Shao,The top in the areas Dai Shao is communicated with wind turbine by air hose,The other end of wind turbine is communicated with dust-removal cloth-bag,The wind turbine is equipped with control switch corresponding thereto,Control switch is electrically connected with wind turbine and external power supply respectively,The pellet in the areas Dai Shao enters cooling area after four warm areas and discharges,Four warm areas are from left to right followed successively by the first warm area,Second warm area,Third warm area and four-temperature region,The inside of four warm areas is equipped with burner and thermocouple,The novel rotary kiln of this distribution heating is by designing the areas Dai Shao and being carried out with controller using mechanics sensor reasonably combined,Control stable discharge quantity,Avoid product differentiation caused by since discharge quantity is excessive excessive.
Description
Technical field
The present invention relates to manganese-zinc ferrite technical field, specially a kind of novel rotary kiln of distributed heating.
Background technology
In the production of existing ferrite powder, commonly used method is mainly dry and wet, and dry method was due to producing
Cheng Jieneng, process control and by extensive use, dry production have main steps that first by iron oxide, manganese oxide, zinc oxide by
Then pelletizing after certain proportion is mixed carries out pre-burning through rotary kiln, most afterwards through being sanded plus glue, mist projection granulating obtain finally
Product, and pre-burning is only one chemical reaction process in whole process, and determines the important link of properties of product quality,
The purpose of pre-burning is the ferrite life for making that a degree of solid phase reaction occurs between each raw material of ferrite, and reache a certain level
Yield, effect have：1 improves the compressibility of ferrite powder, and the latter made granular materials apparent density of pre-burning increases, mobility
It is good, it is easy to fill in a mold, compression ratio reduces；2 reduce the contraction and deformation of product, due to ferrite have been carried out according to
Secondary advance solid phase reaction, therefore in sintering, the contraction of magnetic core will reduce, the influence that kiln furnitures and temperature gradient etc. deform it
It can reduce, thus its deflection also reduces；3 eliminate the harmful effect of abnormal expansion when generating ZnFe2O4, when generating ZnFe2O4,
Expansion is will produce, the stress being consequently formed will cause magnetic core to crack, and in burn-in process, the production quantity of ZnFe2O4 determines
The key quality problems such as the sintered shape variations of final products, cracking, therefore, the property of preburning equipment and technique to Ferrite Material
There can be considerable effect, in actual production, due to the requirement of yield, the bigger charging of general control in production process
Amount, excessively high feeding quantity has prodigious adverse effect to the service life of kiln, first, excessive feeding quantity allows boiler tube to bear bigger
Pressure and frictional force, and boiler tube is just bearing 1000 DEG C of high temperature in burn-in process, then more easily causes boiler tube shape and becomes exclusive or liner
Damage, influences the boiler tube service life；Second is that due to existing kiln using point heat by the way of, material in sintering process it is difficult to ensure that
It is heated evenly, causes same batch products otherness larger；Third, since pelletizing mixes a large amount of moisture, ball is into kiln
The moment of pipe can burst because of a large amount of exclusions of vapor, and viscous wall influence in-furnace temperature distribution and product process is caused to become
It is different.
Invention content
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of novel rotation of distributed heating
Kiln controls discharge quantity and stablizes, and burner and warm area are reasonably distributed, cost are greatly saved, can effectively solve in background technology
The problem of.
To achieve the above object, the present invention provides the following technical solutions：A kind of novel rotary kiln of distributed heating, including
For the blanking bin of blanking, the material in the blanking bin enters the areas Dai Shao by expects pipe, is equipped in the areas Dai Shao for controlling object
The top of the baffle of doses, the areas Dai Shao is communicated with wind turbine by air hose, and the other end of wind turbine is communicated with dust-removal cloth-bag, described
Wind turbine is equipped with control switch corresponding thereto, and control switch is electrically connected with wind turbine and external power supply respectively, the areas Dai Shao
Pellet enter cooling area after four warm areas and discharge, four warm areas are from left to right followed successively by the first warm area, the second warm area, the
The inside of three-temperature-zone and four-temperature region, four warm areas is equipped with burner and thermocouple.
As a preferred technical solution of the present invention, filled out inside the natural gas line being connected to burner
Material, the burner is by being connected on pre-burning cellar for storing things.
As a preferred technical solution of the present invention, the burner is in the first warm area, the second warm area and third warm area
Distribution mode is tight distribution, and distribution mode of the burner in four-temperature region is loose distribution.
As a preferred technical solution of the present invention, the gas discharge for entering four warm areas is four-temperature region ＜
First warm area ＜ the second warm area ＜ third warm areas.
Compared with prior art, the beneficial effects of the invention are as follows：The novel rotary kiln of this distribution heating, 1, pass through design
The areas Dai Shao are simultaneously reasonably combined using mechanics sensor and controller progress, control stable discharge quantity, avoid due to discharge quantity mistake
Product differentiation caused by big is excessive；
2, the distribution of burner and warm area are divided etc. according to carrying out classifying rationally after theory analysis, control gas discharge and
The layout of burner greatly extends the service life of kiln pipe to reduce since kiln pipe hardening cracks caused by burner irrational distribution；
3, by reasonably designing nozzle structure, the uniformity of kiln temperature distribution is improved, to reduce due to natural gas
Temperature difference caused by difference in flow, is also greatly saved cost in the long term.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is nozzle structure schematic diagram of the present invention.
In figure：1 blanking bin, 2 wind turbines, 3 baffles, 4 dust-removal cloth-bags, 5 first warm areas, 6 second warm areas, 7 third warm areas, 8
Four-temperature region, 9 burners, 10 thermocouples, 11 cooling areas, 12 buckles, 13 fillers.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of novel rotary kiln of distributed heating, including with
The areas Dai Shao are entered by expects pipe in the material in the blanking bin 1 of blanking, blanking bin 1, is equipped in the areas Dai Shao and is used for control material amount
Baffle 3, the top in the areas Dai Shao is communicated with wind turbine 2 by air hose, and the other end of wind turbine 2 is communicated with dust-removal cloth-bag 4, on wind turbine 2
Equipped with control switch corresponding thereto, control switch is electrically connected with wind turbine 2 and external power supply respectively, and material is by under blanking bin 1
After material, into the areas Dai Shao, when discharge quantity is excessive, the areas Dai Shao can be gathered in, when the areas Dai Shao, inventory reaches 3 position of baffle,
Pressure output to controller can then be suspended blanking by the mechanics sensor in damper shaft, when inventory properly after restore blanking,
Avoid due to discharge quantity it is excessive caused by glue wall and friction wall liner the problems such as, while material being allowed to be gathered in the another of the areas Dai Shao
One effect is that the aqueous pellet in the areas hot wind Neng Jiangdaishao through high-temperature region is allowed fully dry, and avoids enter into the pellet of pre- firing
It is burst because of overly moist, in addition baffle 3 can also play the role of allowing hot wind water conservancy diversion, avoid 2 face pellet of wind turbine by surface of material
Powder all siphons away, and reduces product waste, and the pellet in the areas Dai Shao enters cooling area 11 after four warm areas and discharges, four temperature
Area is from left to right followed successively by the first warm area 5, the second warm area 6, third warm area 7 and four-temperature region 8, and mode of heating is divided again
Match, by original n nozzle of n warm area, new temperature field point is obtained after carrying out finite element analysis fitting by ANSYS softwares
Each warm area is divided into m new temperature fields, by being carried out to existing warm area the rational deployment in small temperature field by cloth
Adjustment, to obtain uniform distribution of temperature field and the rational furnace temperature of energy lifting, the inside of four warm areas is equipped with burner 9 and heat
Galvanic couple 10.
Filler 13 is filled with inside the natural gas line being connected to burner 9, burner 9 is connected to pre-burning by buckle 12 and stores
On, natural gas enters the effect due to filler 13 after pipeline, momentum of the natural gas to center is significantly reduced, so as to make
Gas discharge into three burners 9 is almost the same, avoid natural gas shunting it is uneven cause local temperature higher or
Relatively low, the effect for buckling 12 is to snap into burner 9 in pre- firing, avoids boiler tube caused by being in direct contact due to pre- burner and kiln
It hardening cracks or even burner 9 falls and causes safety accident etc., the burner 9 after shunting is not necessarily three, can be more.
Burner 9 is tight distribution in the distribution mode of the first warm area 5, the second warm area 6 and third warm area 7, and burner 9 is the 4th
The distribution mode of warm area 8 is loose distribution.
Gas discharge into four warm areas is 5 the second warm areas of ＜ of the first warm area, 6 ＜ thirds warm area 7, four-temperature region 8
Gas discharge is minimum.
When in use：After material is by 1 blanking of blanking bin, into the areas Dai Shao, when discharge quantity is excessive, it can be gathered in and wait burning
Area, when the areas Dai Shao, inventory reaches 3 position of baffle, mechanics sensor in damper shaft can by pressure output to controller, after
And suspend blanking, when inventory properly after restore blanking, avoid due to discharge quantity it is excessive caused by glue wall and friction wall in
The problems such as lining, while it is to allow the aqueous material in the areas hot wind Neng Jiangdaishao through high-temperature region to allow material to be gathered in another effect in the areas Dai Shao
Ball carries out fully dry, and the pellet for avoiding enter into pre- firing is burst because of overly moist, and in addition baffle 3, which can also play, allows hot wind water conservancy diversion
Effect, avoid 2 face pellet of wind turbine from all siphoning away surface of material powder, reduce product waste, natural gas enters pipeline
Afterwards due to the effect of filler 13, momentum of the natural gas to center is significantly reduced, so as to make the day into three burners 9
Right throughput is almost the same, avoids the uneven of natural gas shunting and causes local temperature higher or relatively low, buckles 12 effect
It is to snap into burner 9 in pre- firing, avoids that boiler tube caused by being in direct contact with kiln due to pre- burner is hardening cracked or even burner 9 falls
It falls and causes safety accident etc., the burner 9 after shunting is not necessarily three, can be more.
The present invention by design the areas Dai Shao and using the progress of mechanics sensor and controller it is reasonably combined, control it is stable under
Doses avoids product differentiation caused by since discharge quantity is excessive excessive；By the distribution of burner 9 and warm area division etc. according to theory
Classifying rationally is carried out after analysis, the layout of gas discharge and burner 9 is controlled, to reduce due to 9 irrational distribution of burner
Caused by kiln pipe hardening crack, greatly extend the service life of kiln pipe；By reasonably designing 9 structure of burner, kiln temperature distribution is improved
Cost is also greatly saved to reduce due to temperature difference caused by gas discharge difference in uniformity in the long term.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of novel rotary kiln of distributed heating, includes the blanking bin (1) for blanking, it is characterised in that：The blanking
Material in storehouse (1) enters the areas Dai Shao by expects pipe, and the baffle (3) for control material amount is equipped in the areas Dai Shao, described to wait burning
The top in area is communicated with wind turbine (2) by air hose, and the other end of wind turbine (2) is communicated with dust-removal cloth-bag (4), on the wind turbine (2)
Equipped with control switch corresponding thereto, control switch is electrically connected with wind turbine (2) and external power supply respectively, the material in the areas Dai Shao
Ball warp enters cooling area (11) discharging after crossing four warm areas, and four warm areas are from left to right followed successively by the first warm area (5), the second warm area
(6), the inside of third warm area (7) and four-temperature region (8), four warm areas is equipped with burner (9) and thermocouple (10).
2. a kind of novel rotary kiln of distributed heating according to claim 1, it is characterised in that：Described and burner (9)
Filler (13) is filled with inside the natural gas line of connection, the burner (9) is connected to by buckle (12) on pre-burning cellar for storing things.
3. a kind of novel rotary kiln of distributed heating according to claim 1, it is characterised in that：The burner (9) exists
The distribution mode of first warm area (5), the second warm area (6) and third warm area (7) is tight distribution, and burner (9) is in four-temperature region (8)
Distribution mode be loose distribution.
4. a kind of novel rotary kiln of distributed heating according to claim 1, it is characterised in that：It is described to enter four temperature
The gas discharge in area is four-temperature region (8) the first warm areas of ＜ (5) the second warm areas of ＜ (6) ＜ thirds warm area (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710062389.6A CN108344295A (en) | 2017-01-23 | 2017-01-23 | A kind of novel rotary kiln of distributed heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710062389.6A CN108344295A (en) | 2017-01-23 | 2017-01-23 | A kind of novel rotary kiln of distributed heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108344295A true CN108344295A (en) | 2018-07-31 |
Family
ID=62963362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710062389.6A Pending CN108344295A (en) | 2017-01-23 | 2017-01-23 | A kind of novel rotary kiln of distributed heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108344295A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181712A1 (en) * | 2019-03-14 | 2020-09-17 | 金刚新材料股份有限公司 | Rotary kiln having segmented temperature control capability |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202793043U (en) * | 2012-08-13 | 2013-03-13 | 镇江金港磁性元件有限公司(中外合资） | Magnetic material sintering system |
| CN103981355A (en) * | 2014-04-16 | 2014-08-13 | 宁国东方碾磨材料股份有限公司 | Steel ball heat treatment quenching line |
| CN104061790A (en) * | 2014-06-24 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Pre-burning kiln with constant sintering amount |
| CN105622111A (en) * | 2014-10-29 | 2016-06-01 | 自贡市江阳磁材有限责任公司 | Sintering technology of high-performance permanent magnetic ferrite |
| CN206618257U (en) * | 2017-01-23 | 2017-11-07 | 临沂春光磁业有限公司 | A kind of novel rotary kiln of distributed heating |
-
2017
- 2017-01-23 CN CN201710062389.6A patent/CN108344295A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202793043U (en) * | 2012-08-13 | 2013-03-13 | 镇江金港磁性元件有限公司(中外合资） | Magnetic material sintering system |
| CN103981355A (en) * | 2014-04-16 | 2014-08-13 | 宁国东方碾磨材料股份有限公司 | Steel ball heat treatment quenching line |
| CN104061790A (en) * | 2014-06-24 | 2014-09-24 | 无锡市崇安区科技创业服务中心 | Pre-burning kiln with constant sintering amount |
| CN105622111A (en) * | 2014-10-29 | 2016-06-01 | 自贡市江阳磁材有限责任公司 | Sintering technology of high-performance permanent magnetic ferrite |
| CN206618257U (en) * | 2017-01-23 | 2017-11-07 | 临沂春光磁业有限公司 | A kind of novel rotary kiln of distributed heating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181712A1 (en) * | 2019-03-14 | 2020-09-17 | 金刚新材料股份有限公司 | Rotary kiln having segmented temperature control capability |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180731 |