CN108911663A - A method of Thistle board is produced using calcium lignosulfonate and naphthalene system composite water-reducing agent - Google Patents
A method of Thistle board is produced using calcium lignosulfonate and naphthalene system composite water-reducing agent Download PDFInfo
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- CN108911663A CN108911663A CN201810754683.8A CN201810754683A CN108911663A CN 108911663 A CN108911663 A CN 108911663A CN 201810754683 A CN201810754683 A CN 201810754683A CN 108911663 A CN108911663 A CN 108911663A
- Authority
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- Prior art keywords
- water
- reducing agent
- calcium lignosulfonate
- ripe powder
- naphthalene
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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.)
- Pending
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 51
- 229920005551 calcium lignosulfonate Polymers 0.000 title claims abstract description 37
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 title claims abstract description 37
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 241000132536 Cirsium Species 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 24
- 239000010440 gypsum Substances 0.000 claims abstract description 24
- 238000001354 calcination Methods 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 22
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 10
- 230000009467 reduction Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 230000011218 segmentation Effects 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000004615 ingredient Substances 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 abstract description 10
- 230000008020 evaporation Effects 0.000 abstract description 10
- 238000012858 packaging process Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 14
- 238000007792 addition Methods 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000006071 cream Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000002790 naphthalenes Chemical class 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 240000001579 Cirsium arvense Species 0.000 description 1
- 235000005918 Cirsium arvense Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920000867 polyelectrolyte Polymers 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Proposed by the present invention is a kind of method using calcium lignosulfonate and naphthalene system composite water-reducing agent production Thistle board.Desulfurized gypsum is subjected to raw material admixture, raw material after admixture enters the mixing of silo material homogenizer, it is clinker that raw material after mixing, which carries out first step calcining, the calcined clinker of the first step carries out second calcining, ripe powder enters ripe powder grinding in ball mill, and quantitative calcium lignosulfonate water-reducing agent is added by auger conveyor；Ripe powder enters storage bin and places the ripe powder ageing of progress, and after ripe powder ageing plus water ingredient carries out slurry preparation, while quantitatively naphthalene water reducer is added；Complete the production of Thistle board after slurry preparation with packaging process through gypsum sheet metal forming, drying and segmentation.The present invention, which is used, adds calcium lignosulfonate water-reducing agent by auger conveyor before the grinding of ripe powder, and reduction land plaster mark is thick, reduces the evaporation capacity for using water；Naphthalene water reducer is added by auger conveyor during slurry preparation, reduces the water consumption of production.It is suitable for the method application as production Thistle board.
Description
Technical field
Proposed by the present invention is the production method of building field Thistle board, mainly applies calcium lignosulfonate and naphthalene system is compound subtracts
Aqua.Specifically a kind of method using calcium lignosulfonate and naphthalene system composite water-reducing agent production Thistle board.
Background technique
Thistle board is a kind of widely used building and ornament materials, has that light, sound insulation, intensity be high, construction speed
Spend fast feature.The use of the natural gypsum or Commercial modified gypsum is raw material, by calcining powder, stirring pulping, foaming sticky paper at
Type, drying, segmentation, packaging process.
But traditional gypsum board manufacture water requirement is big, evaporation capacity is big so that water resource waste is more, energy consumption is high, production capacity by
Limit.Based on this status, there is an urgent need to a kind of methods of reduction water consumption and the energy-saving production Thistle board of evaporation capacity.
Summary of the invention
In order to reduce water consumption and evaporation capacity in Thistle board produces, calcium lignosulfonate is applied the invention proposes a kind of
With the method for naphthalene system composite water-reducing agent production Thistle board.This method passes through addition calcium lignosulfonate water-reducing agent, material before ripe powder is ground
Slurry adds naphthalene water reducer in preparing, and reduces the thick reduction of land plaster mark, evaporation capacity；While keeping slurry fluidity, water cream
Than reducing, water consumption is reduced, solves the technical issues of reducing water consumption and evaporation capacity in Thistle board production.
The technical proposal for solving the technical problem of the invention is：
Different sources desulfurized gypsum is subjected to raw material admixture by a certain percentage, it is mixed that the raw material after admixture enters silo material homogenizer
Even, it is clinker that the raw material after mixing, which carries out the quick first step calcining of high temperature, and the control crystallization water is after 10%~11%, first step calcining
Clinker carry out low temperature at a slow speed second calcining, calcination time 25min, out powder temperature control at 155 DEG C, through the first step calcining and
Second calcining after-ripening powder enters ripe powder grinding in ball mill, and is added and is determined by auger conveyor before ripe powder enters ball mill
Measure calcium lignosulfonate water-reducing agent；Ripe powder after grinding enters storage bin and places the ripe powder ageing of progress, and after ripe powder ageing plus water ingredient is expected
Slurry is prepared, while quantitative naphthalene water reducer is added by auger conveyor；Through gypsum sheet metal forming, drying and segmentation after slurry preparation
The production of Thistle board is completed with packaging process.
The calcium lignosulfonate water-reducing agent dosage is 0.2%~0.3%（Mass ratio）, preferably 0.25%（Mass ratio）, ground in ripe powder
Preceding addition calcium lignosulfonate water-reducing agent, so that ripe powder is uniformly mixed with calcium lignosulfonate water-reducing agent, the thick reduction of land plaster mark.
The naphthalene water reducer dosage is 12-30g/ ㎡（Mass ratio）, naphthalene water reducer is added in slurry preparation, is acted on
Time is fast, feedback cycle is short, is regulated and controled according to the slurry fluidity in production.
Good effect, since the present invention uses first step calcination method and second calcination method, and it is logical before the grinding of ripe powder
Auger conveyor addition calcium lignosulfonate water-reducing agent is crossed, reduction land plaster mark is thick, reduces the evaporation capacity for using water；Lead to during slurry preparation
Auger conveyor addition naphthalene water reducer is crossed, water paste ratio is reduced, reduces the water consumption of production.Using composite water-reducing agent, save
Resource and the energy, improve energy-saving efficiency.It is suitable for the method application as production Thistle board.
Detailed description of the invention
Fig. 1 is production procedure schematic diagram of the present invention.
In figure, 1. raw materials are added, 2. material homogenizers, and the calcining of 3. first steps, the calcining of 4. second steps, 5. clinker grindings, 6. is ripe
Material ageing, 7. slurry preparations, 8. gypsum sheet metal formings, 9. drying, 10. segmentations and packaging, 11. auger conveyors.
Specific embodiment
According to the figure, different sources desulfurized gypsum is carried out to raw material by a certain percentage and adds 1, the raw material after admixture enters cylinder
Storehouse material homogenizer 2 mixes, and it is clinker that raw material after mixing, which carries out the quick first step calcining 3 of high temperature, the control crystallization water 10%~
11%, the calcined clinker of the first step carries out low temperature second calcining 4, calcination time 25min at a slow speed, and the control of powder temperature is 155 out
DEG C, enter ripe powder grinding 5 in ball mill through first step calcining and second calcining after-ripening powder, and lead to before ripe powder enters ball mill
It crosses auger conveyor 11 and quantitative calcium lignosulfonate water-reducing agent is added；Ripe powder after grinding enters storage bin and places the ripe powder ageing 6 of progress, ripe powder
After ageing plus water ingredient carries out slurry preparation 7, while quantitative naphthalene water reducer is added by auger conveyor；It is passed through after slurry preparation
The production of Thistle board is completed in gypsum sheet metal forming 8, drying 9 and segmentation with 10 processes of packaging.
The calcium lignosulfonate water-reducing agent dosage is 0.2%~0.3%（Mass ratio）, preferably 0.25%（Mass ratio）, ground in ripe powder
Preceding addition calcium lignosulfonate water-reducing agent, so that ripe powder is uniformly mixed with calcium lignosulfonate water-reducing agent, the thick reduction of land plaster mark.
The naphthalene water reducer dosage is 12-30g/ ㎡（Mass ratio）, naphthalene water reducer is added in slurry preparation, is acted on
Time is fast, feedback cycle is short, is regulated and controled according to the slurry fluidity in production.
The working principle of the invention：
Calcium lignosulfonate is anionic high molecular surfactant, it can make molecular property and alternate interaction of molecules spy on interface
Property has greatly changed.Calcium lignosulfonate mix land plaster in, after land plaster is mixed with water, calcium lignosulfonate be dissociated into macromolecular anion with
Metal cation calcium ion.The macromolecular Anion-adsorption of stronger surface-active is presented on the surface of gypsum particle, makes stone
Cream grain subband negative electrical charge disperses gypsum particle since identical charges are mutually exclusive.Simultaneously as calcium lignosulfonate is hydrophilic, suction
The film of solvation of the attached layer around gypsum particle can also hinder gypsum to agglomerate, and cause steric restriction, thus make gypsum particle and
Secondary aggregation particle spreads out, and releases water and air contained in gelinite, and such free water increases, and makes the stream of calcium plaster
Dynamic degree improves.In addition, since calcium lignosulfonate can reduce gas-liquid surface tension, and there is certain bleed, the rolling of microbubble and floating
Hold in the palm the improved effect workability of calcium plaster.Finally, containing slow setting group in the molecule of itself in calcium lignosulfonate other than containing sugar
Hydroxyl and ehter bond, therefore have deferred action.This inhibiting effect to gypsum initial stage aquation reduces chemical bonding water, and opposite
Free water increase, make calcium plaster fluidity improve.Addition calcium lignosulfonate water-reducing agent can make the thick reduction of land plaster mark before the milling, by original
102% 90% is reduced to be averaged（Mass ratio）, while land plaster intensity improves, evaporation capacity reduces.Addition calcium lignosulfonate subtracts before the milling
It is long to the land plaster action period after aqua, land plaster quality can be made to significantly improve by ageing.
Naphthalene series high-efficiency water-reducing agent molecule belongs to few branch linear structure, and sulfonic group is a kind of stub formula to gypsum particle absorption
Absorption shape, space multistory repulsive force is smaller, and dispersion force is mainly determined by electrostatic repulsion, and feature is that adsorbance is more but adsorption capacity
It is weaker；Diminishing agent molecule easily acts on various factors such as progress, Brownian movement, gravity and the mechanical stirrings of aquation and is detached from gypsum
Particle surface causes to agglomerate acceleration between particle, it is big macroscopically to show as fluidity gradual loss.Poly carboxylic acid series super plasticizer belongs to
Polyelectrolyte contains carboxyl, sulfonic group isopolarity group in chemical structure, and has the polyethylene oxide side chains of certain length, in stone
It is tooth form absorption on cream particle, feature is small for adsorbance, but because the steric hindrance that its branch generates prevents particle from close to each other,
To make gypsum particle disperse and stablize.The naphthalene series high-efficiency water-reducing agent for having added synthesized co-poly carboxylic acid remains naphthalene system
Water-reducing agent assigns the preferable dispersion stabilization of gypsum particle to the higher dispersibility of gypsum, this is electrostatic repulsion and three-dimensional effect
The result for answering comprehensive function is from the perspective of from the angle of colloid chemistry, is protective effect of the high molecular surfactant to colloid.Gypsum is inhaled
Attached naphthalene water reducer molecule so that particle dispersion mixes polycarboxylic acids molecule therein and is also adsorbed, but since content is very low,
It does not play a leading role to dispersion, they form hydrogen using multiple ethyoxyl ehter bonds on dentation absorption shape and its side chain and hydrone
Key and form hydrophily solid protective membrane, play the role of increasing intensity and thickness to water-reducing agent adsorption layer, within a certain period of time may be used
The mutual coalescence for preventing particle, plays the effect for keeping dispersion stable.The naphthalene water reducer action period is added when slurry preparation
Short to produce, it can be achieved that quickly adjusting, when same fluidity is 160, water requirement is significantly reduced, and normally adds in calcium lignosulfonate water-reducing agent
In the case of, water paste ratio reduces to 60% by original 65%（Mass ratio）.
The features of the present invention：
1, due to the addition before ripe powder is ground of calcium lignosulfonate water-reducing agent, so can preferably mix with ripe powder, calcium lignosulfonate water-reducing agent is uniform
It is dispersed in ripe powder, the thick reduction of land plaster mark, evaporation capacity reduces.
2, due to adding naphthalene water reducer in slurry preparation, action time is fast, and feedback cycle is short, it is possible to according to life
Situation in production regulates and controls the fluidity of slurry at any time.
3, due to using two kinds of compound additions of water-reducing agent, pulp flow is kept in the case where low water demand so being more advantageous to
Dynamic degree, when calcium lignosulfonate water-reducing agent normally adds, when fluidity is 160, water requirement is significantly reduced, and water paste ratio is by original
65% reduces to 60%（Mass ratio）, the water consumption and evaporation capacity in Thistle board production process are significantly reduced, energy conservation is improved
Efficiency meets production requirement.
Claims (3)
1. a kind of method using calcium lignosulfonate and naphthalene system composite water-reducing agent production Thistle board, it is characterized in that：
Different sources desulfurized gypsum is subjected to raw material admixture by a certain percentage（1）, the raw material after admixture enters silo material homogenizer
（2）It mixes, the raw material after mixing carries out the quick first step calcining of high temperature（3）For clinker, the crystallization water is controlled 10%~11%, first
It walks calcined clinker and carries out low temperature second calcining at a slow speed（4）, calcination time 25min, the control of powder temperature is at 155 DEG C out, warp
First step calcining and second calcining after-ripening powder enter ripe powder grinding in ball mill（5）, and pass through before ripe powder enters ball mill
Auger conveyor（11）Quantitative calcium lignosulfonate water-reducing agent is added；Ripe powder after grinding enters storage bin and places the ripe powder ageing of progress（6）, ripe
After powder ageing plus water ingredient carries out slurry preparation（7）, while quantitative naphthalene water reducer is added by auger conveyor；Slurry preparation
By gypsum sheet metal forming（8）, drying（9）With segmentation and packaging（10）The production of process completion Thistle board.
2. a kind of method using calcium lignosulfonate and naphthalene system composite water-reducing agent production Thistle board according to claim 1,
It is characterized in：
The calcium lignosulfonate water-reducing agent dosage is 0.2%~0.3%（Mass ratio）, preferably 0.25%（Mass ratio）, add before the grinding of ripe powder
Add calcium lignosulfonate water-reducing agent, so that ripe powder is uniformly mixed with calcium lignosulfonate water-reducing agent, the thick reduction of land plaster mark.
3. a kind of method using calcium lignosulfonate and naphthalene system composite water-reducing agent production Thistle board according to claim 1,
It is characterized in：
The naphthalene water reducer dosage is 12-30g/ ㎡（Mass ratio）, naphthalene water reducer, action time are added in slurry preparation
Fastly, feedback cycle is short, is regulated and controled according to the slurry fluidity in production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754683.8A CN108911663A (en) | 2018-07-11 | 2018-07-11 | A method of Thistle board is produced using calcium lignosulfonate and naphthalene system composite water-reducing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754683.8A CN108911663A (en) | 2018-07-11 | 2018-07-11 | A method of Thistle board is produced using calcium lignosulfonate and naphthalene system composite water-reducing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108911663A true CN108911663A (en) | 2018-11-30 |
Family
ID=64411424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810754683.8A Pending CN108911663A (en) | 2018-07-11 | 2018-07-11 | A method of Thistle board is produced using calcium lignosulfonate and naphthalene system composite water-reducing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108911663A (en) |
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|---|---|---|---|---|
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|---|---|---|---|---|
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| Title |
|---|
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Application publication date: 20181130 |
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