CN108855634B - Novel flotation machine - Google Patents
Novel flotation machine Download PDFInfo
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- CN108855634B CN108855634B CN201810706476.5A CN201810706476A CN108855634B CN 108855634 B CN108855634 B CN 108855634B CN 201810706476 A CN201810706476 A CN 201810706476A CN 108855634 B CN108855634 B CN 108855634B
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- rotating shaft
- hollow rotating
- air inlet
- inlet pipe
- rubber ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/16—Flotation machines with impellers; Subaeration machines
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- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention relates to a novel flotation machine which comprises a box body, a stirring mechanism and an inflating mechanism, wherein a first support frame is arranged on the outer side of the right wall surface of the box body, a motor is arranged at the upper end of the support frame, a driving wheel is arranged on an output shaft of the motor, the stirring mechanism comprises a hollow rotating shaft, the hollow rotating shaft is vertically arranged, the upper part of the hollow rotating shaft extends out of the box body, a bearing body is arranged at the upper end of the box body, the bearing body is sleeved on the hollow rotating shaft, a driven belt wheel is arranged above the bearing body, the driven belt wheel is sleeved on the hollow rotating shaft, the middle lower part of the hollow rotating shaft is arranged in the box body, a turbulence cover is arranged at the lower part of the hollow rotating shaft. According to the invention, the traditional inflation mode is changed, so that pressurized air is more directly conveyed into the flotation machine, and the inflation effect is better.
Description
Technical Field
The invention relates to the technical field of ore dressing equipment manufacturing, in particular to a novel flotation machine.
Background
The flotation machine is a mineral processing device, and the flotation machine adopted in the non-ferrous metal, ferrous metal and non-metallic mineral separation industry generally consists of a motor device, a main shaft part and a tank body part. When the flotation machine works, the motor device drives the main shaft impeller to rotate and stir the ore pulp in the tank body, meanwhile, the air filled in the tank body is cut into small bubbles, the bubbles collide with mineral particles in the ore pulp and are attached to form mineralized bubbles, the mineralized bubbles rise to the liquid level of the ore pulp to form a foam layer, and the flotation process is completed, since the gas charged to the interior of the flotation machine has a certain pressure, which is related to the depth of submersion of the impeller, in general, the larger the flotation machine is, the larger the immersion depth of the impeller is, the higher the pressure required by the gas filled in the flotation machine is, when the existing flotation machine is filled with gas, the pressurized air firstly enters the main shaft bearing body, this puts a high demand on the sealing effect between the bearing body and the main shaft, the manufacturing cost will be increased, meanwhile, the subsequent operation cost is also influenced to be higher, and the processing difficulty of the main shaft and the bearing body of the flotation machine is high by adopting the inflation mode.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the novel flotation machine changes the traditional inflation mode, so that pressurized air is conveyed to the interior of the flotation machine more directly, and the inflation effect is better.
In order to solve the technical problems, the invention adopts the following technical scheme:
a novel flotation machine comprises a box body, a stirring mechanism and an inflating mechanism, wherein a first support frame is arranged on the outer side of the right wall surface of the box body, a motor is arranged at the upper end of the support frame, a driving wheel is arranged on an output shaft of the motor, the stirring mechanism comprises a hollow rotating shaft, the hollow rotating shaft is vertically arranged, the upper part of the hollow rotating shaft extends out of the box body, a bearing body is arranged at the upper end of the box body, the bearing body is sleeved on the hollow rotating shaft, a driven belt wheel is arranged above the bearing body, the driven belt wheel is sleeved on the hollow rotating shaft, the middle lower part of the hollow rotating shaft is arranged in the box body, a turbulence cover is arranged at the lower part of the hollow rotating shaft, the turbulence cover is sleeved on the hollow rotating shaft, a first support plate is arranged below the turbulence cover, a second support plate is arranged below, a plurality of exhaust holes are distributed on the outer circumferential surface of the lower part of the hollow rotating shaft;
the inflation mechanism comprises a first air inlet pipe, a sleeve, a second air inlet pipe and an air inlet connecting pipe, the lower end of the first air inlet pipe is in threaded connection with the air inlet connecting pipe, the air inlet connecting pipe is communicated with the upper end of the sleeve, a plurality of bearings are arranged in the sleeve from top to bottom, and the inner ring of each bearing is provided with the second air inlet pipe; the air inlet connecting pipe is buckled and connected with the second air inlet pipe through a sealing structure, the bottom end of the air inlet connecting pipe is provided with a first sealing baffle, a sealing element bracket and a first rubber ring annular groove, and the top end of the first sealing baffle is vulcanized with a first rubber ring; a second sealing baffle plate and a second rubber ring annular groove are arranged at the top end of the second air inlet pipe, a second rubber ring is vulcanized at the bottom end of the second sealing baffle plate, the first rubber ring is abutted in the second rubber ring annular groove, and the second rubber ring is abutted in the first rubber ring annular groove; a sealing element supported by a sealing element bracket is arranged between the inner peripheral side of the air inlet connecting pipe and the outer peripheral side of the second air inlet pipe, and a sealing element lip edge is arranged on the outer peripheral side of the second air inlet pipe; the lower end of the second air inlet pipe is in threaded connection with the hollow rotating shaft 4, and a sealing ring is arranged between the bearing and the second air inlet pipe.
The end surface evenly sets up a plurality of draw-in grooves along circumference under the hollow rotating shaft, and hollow rotating shaft below is provided with filter cartridge assembly, and filter cartridge assembly includes end cover and filter sieve, and the vertical setting of filter sieve is provided with a plurality of buckles in the end cover up end along circumference, and the buckle setting is in the filter sieve outside, the quantity and the position and the draw-in groove looks adaptation that the buckle set up.
Preferably, 2-4 card slots are provided.
Preferably, 2-4 snap fasteners are provided.
Preferably, a seal ring is provided between the bearing and the second intake pipe.
Preferably, a sleeve is fixedly arranged at the upper end of the turbulence cover and sleeved on the hollow rotating shaft.
Preferably, the sleeve is connected with the spoiler cover by a bolt.
Preferably, the driven pulley is sleeved on the hollow rotating shaft in a key connection mode.
Compared with the prior art, the invention has the beneficial effects that: according to the stirring mechanism, the first supporting plate and the second supporting plate are arranged, the stirring blades are arranged between the first supporting plate and the second supporting plate, the stirring range is enlarged, the stirring efficiency is improved, the air inlet mechanism is arranged, the rotation of the hollow rotating shaft can be guaranteed while air is fed, pressurized air can be directly conveyed to the bottom of the flotation machine through the exhaust hole in the lower end of the hollow rotating shaft, the aeration effect is improved, meanwhile, the air does not need to pass through the bearing body, a sealing element in the bearing body only serves the purposes of oil sealing and dust prevention and does not need to prevent the leakage of the pressurized air, and the sealing difficulty between the bearing body and the main shaft is greatly reduced; further set up and filter a subassembly, can prevent that mineral from blockking up the exhaust hole, further set up buckle and draw-in groove, convenient to detach filters a subassembly with changing, further sets up the sleeve, can protect hollow pivot by mineral wearing and tearing, improve the life-span that equipment used. According to the invention, the traditional inflation mode is changed, so that pressurized air is more directly conveyed into the flotation machine, and the inflation effect is better.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an air intake mechanism according to the present invention;
FIG. 3 is an enlarged view of a portion of the intake mechanism of FIG. 2;
FIG. 4 is a schematic view of the vent of the present invention;
FIG. 5 is a schematic structural view of a filter cartridge assembly according to the present invention;
fig. 6 is a bottom view of the hollow rotary shaft of the present invention.
In the figure: 1. the device comprises a first air inlet pipe 2, a sleeve 3, a second air inlet pipe 4, a hollow rotating shaft 4-1, an exhaust hole 4-2, a clamping groove 5, a driven belt wheel 6, a bearing body 7, a box body 8, a sleeve 9, a turbulent flow cover 10, a first supporting plate 11, a stirring blade 12, a second supporting plate 13, an end cover 13-1, a buckle 14, a first supporting frame 15, a motor 16, a driving belt wheel 17, a filter sieve 18, a bearing 19, a sealing ring 20, an air inlet connecting pipe 21, a first sealing baffle 22, a sealing piece 23, a sealing piece bracket 24, a first rubber ring annular groove 25 and a first rubber ring.
Detailed Description
Example (b): as shown in figures 1 to 6, a novel flotation machine comprises a box body 7, a stirring mechanism and an inflating mechanism, wherein a first support frame 14 is arranged on the outer side of the right wall surface of the box body 7, a motor 15 is arranged at the upper end of the support frame, a driving belt wheel 16 is arranged on an output shaft of the motor 15, the stirring mechanism comprises a hollow rotating shaft 4, the hollow rotating shaft 4 is vertically arranged, the upper part of the hollow rotating shaft 4 extends out of the box body 7, a bearing body 6 is arranged at the upper end of the box body 7, the bearing body 6 is sleeved on the hollow rotating shaft 4, a driven belt wheel 5 is arranged above the bearing body 6, the driven belt wheel 5 is sleeved on the hollow rotating shaft 4 in a key connection mode, the middle lower part of the hollow rotating shaft 4 is arranged in the box body 7, a turbulence cover 9 is arranged at the lower part of the hollow rotating shaft 4, a first support plate 10 is arranged, the first supporting plate 10 and the second supporting plate 12 are sleeved on the hollow rotating shaft 4, a plurality of stirring blades 11 are arranged between the first supporting plate 10 and the second supporting plate 12, a plurality of exhaust holes 4-1 are distributed on the outer circumferential surface of the lower part of the hollow rotating shaft 4, a sleeve 8 is fixedly arranged at the upper end of the turbulence cover 9, the sleeve 8 is sleeved on the hollow rotating shaft 4, and the sleeve 8 is connected with the turbulence cover 9 through bolts;
the inflation mechanism comprises a first air inlet pipe 1, a sleeve 2, a second air inlet pipe 3 and an air inlet connecting pipe 20, the lower end of the first air inlet pipe 1 is in threaded connection with the air inlet connecting pipe 20, the air inlet connecting pipe 20 is communicated with the upper end of the sleeve 2, a plurality of bearings 18 are arranged in the sleeve 2 from top to bottom, and the second air inlet pipe 3 is arranged on the inner ring of each bearing 18; the air inlet connecting pipe 20 is connected with the second air inlet pipe 3 in a buckling mode through a sealing structure, a first sealing baffle 21, a sealing element bracket 23 and a first rubber ring annular groove 24 are arranged at the bottom end of the air inlet connecting pipe 20, and a first rubber ring 25 is vulcanized at the top end of the first sealing baffle 21; a second sealing baffle plate and a second rubber ring annular groove are arranged at the top end of the second air inlet pipe 3, a second rubber ring is vulcanized at the bottom end of the second sealing baffle plate, the first rubber ring 25 is abutted in the second rubber ring annular groove, and the second rubber ring is abutted in the first rubber ring annular groove 24; a seal member 22 supported by a seal member bracket 23 is provided between the inner peripheral side of the intake connecting pipe 20 and the outer peripheral side of the second intake pipe 3, and a lip of the seal member 22 is provided on the outer peripheral side of the second intake pipe 3; the lower end of the second air inlet pipe 3 is in threaded connection with the hollow rotating shaft 4, and a sealing ring 19 is arranged between the bearing 18 and the second air inlet pipe 3. Through the baffle and the rubber circle that set up each other on air inlet connection pipe 20 and the second intake pipe 3 and the sealing action of rubber circle annular, can improve the gas tightness between the junction, guarantee that high-pressure air directly carries to inside the flotation machine, set up sealing member 22 in addition between air inlet connection pipe 20 internal week side and second intake pipe 3 periphery side, can further improve the gas tightness of junction.
The lower end face of the hollow rotating shaft 4 is uniformly provided with a plurality of clamping grooves 4-2 along the circumferential direction, a filter cylinder assembly is arranged below the hollow rotating shaft 4 and comprises an end cover 13 and a filter sieve 17, the filter sieve 17 is vertically arranged at the upper end of the end cover 13, the upper end face of the end cover 13 is provided with a plurality of buckles 13-1 along the circumferential direction, the buckles 13-1 are arranged at the outer side of the filter sieve 17, the number and the positions of the buckles 13-1 are matched with those of the clamping grooves 4-2, 2-4 clamping grooves 4-2 are arranged, and 2-4 buckles 13-1 are arranged.
When the invention is implemented, the motor 15 is started, the motor 15 drives the driving belt pulley 16 to rotate, the driving belt pulley 16 drives the driven belt pulley 5 to rotate through the conveying belt, the driven belt pulley 5 drives the hollow rotating shaft 4 to rotate, the upper end of the hollow rotating shaft 4 is connected with the second air inlet pipe 3 through threads, the second air inlet pipe 3 is connected with the sleeve 2 to rotate, the hollow rotating shaft 4 can rotate while air is ensured to be admitted, pressurized air is directly discharged into the flotation machine through the air outlet hole 4-1 at the lower part of the hollow rotating shaft 4, the filter cylinder assembly is clamped at the lower end of the hollow rotating shaft 4 through the matching of the buckle 13-1 and the clamping groove 4-2, the outer diameter of the filter sieve 17 is the same as the inner diameter of the hollow rotating shaft 4, the height of the filter sieve 17 is matched with the set length of the air outlet hole 4-1, the driven, the air and mineral liquid are mixed more uniformly.
In conclusion, the stirring mechanism provided by the invention has the advantages that the first supporting plate and the second supporting plate are arranged, the stirring blades are arranged between the first supporting plate and the second supporting plate, the stirring range is enlarged, the stirring efficiency is improved, the air inlet mechanism is arranged, the rotation of the hollow rotating shaft can be ensured while air is fed, pressurized air can be directly conveyed to the bottom of the flotation machine through the exhaust hole at the lower end of the hollow rotating shaft, the aeration effect is improved, meanwhile, the air does not need to pass through the bearing body, the sealing element in the bearing body only serves the functions of oil sealing and dust prevention and does not need to prevent the leakage of the pressurized air, and the sealing difficulty between the bearing body and the main shaft is greatly reduced; further set up and filter a subassembly, can prevent that mineral from blockking up the exhaust hole, further set up buckle and draw-in groove, convenient to detach filters a subassembly with changing, further sets up the sleeve, can protect hollow pivot by mineral wearing and tearing, improve the life-span that equipment used. According to the invention, the traditional inflation mode is changed, so that pressurized air is more directly conveyed into the flotation machine, and the inflation effect is better.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (1)
1. A new flotation machine is characterized in that: comprises a box body (7), a stirring mechanism and an inflating mechanism, wherein a first support frame (14) is arranged on the outer side of the right wall surface of the box body, a motor (15) is arranged at the upper end of the first support frame (14), a driving belt wheel (16) is arranged on an output shaft of the motor (15), the stirring mechanism comprises a hollow rotating shaft (4), the hollow rotating shaft (4) is vertically arranged, the upper part of the hollow rotating shaft (4) extends out of the box body (7), a bearing body (6) is arranged at the upper end of the box body (7), the bearing body (6) is sleeved on the hollow rotating shaft (4), a driven belt wheel (5) is arranged above the bearing body (6), the driven belt wheel (5) is sleeved on the hollow rotating shaft (4), the middle lower part of the hollow rotating shaft (4) is arranged in the box body (7), a turbulence cover (9) is arranged at the lower part of the hollow rotating shaft (4), the, a second supporting plate (12) is arranged below the first supporting plate, the first supporting plate (10) and the second supporting plate (12) are sleeved on the hollow rotating shaft (4), a plurality of stirring blades (11) are arranged between the first supporting plate (10) and the second supporting plate (12), and a plurality of exhaust holes (4-1) are distributed on the outer circumferential surface of the lower part of the hollow rotating shaft (4);
the inflation mechanism comprises a first air inlet pipe (1), a sleeve (2), a second air inlet pipe (3) and an air inlet connecting pipe (20), the lower end of the first air inlet pipe (1) is in threaded connection with the air inlet connecting pipe (20), the air inlet connecting pipe (20) is communicated with the upper end of the sleeve (2), a plurality of bearings (18) are arranged in the sleeve (2) from top to bottom, and the second air inlet pipe (3) is arranged on the inner ring of each bearing (18); the air inlet connecting pipe (20) is connected with the second air inlet pipe (3) in a buckling mode through a sealing structure, a first sealing baffle (21), a sealing element bracket (23) and a first rubber ring groove (24) are arranged at the bottom end of the air inlet connecting pipe (20), and a first rubber ring (25) is vulcanized at the top end of the first sealing baffle (21); a second sealing baffle plate, a second rubber ring annular groove and a second rubber ring are arranged at the top end of the second air inlet pipe (3), the bottom end of the second sealing baffle plate is vulcanized with the second rubber ring, the first rubber ring (25) is abutted against the inside of the second rubber ring annular groove, and the second rubber ring is abutted against the inside of the first rubber ring annular groove (24); a sealing element (22) supported by a sealing element bracket (23) is arranged between the inner circumferential side of the air inlet connecting pipe (20) and the outer circumferential side of the second air inlet pipe (3), and the lip edge of the sealing element (22) is arranged on the outer circumferential side of the second air inlet pipe (3); the lower end of the second air inlet pipe (3) is in threaded connection with the hollow rotating shaft (4), and a sealing ring (19) is arranged between the bearing (18) and the second air inlet pipe (3);
a plurality of clamping grooves (4-2) are uniformly formed in the lower end face of the hollow rotating shaft (4) along the circumferential direction, a filter cylinder assembly is arranged below the hollow rotating shaft (4), the filter cylinder assembly comprises an end cover (13) and a filter sieve (17), the filter sieve (17) is vertically arranged at the upper end of the end cover (13), a plurality of buckles (13-1) are arranged on the upper end face of the end cover (13) along the circumferential direction, the buckles (13-1) are arranged on the outer side of the filter sieve (17), and the number and the positions of the buckles (13-1) are matched with the clamping grooves (4-2);
2-4 clamping grooves (4-2) are arranged;
2-4 buckles (13-1) are arranged;
a sealing ring is arranged between the bearing (18) and the second air inlet pipe (3);
a sleeve (8) is fixedly arranged at the upper end of the turbulence cover (9), and the sleeve (8) is sleeved on the hollow rotating shaft (4);
the sleeve (8) is connected with the turbulence cover (9) through a bolt;
the driven belt wheel (5) is sleeved on the hollow rotating shaft (4) in a key connection mode;
when the method is implemented, a motor (15) is started, the motor (15) drives a driving belt wheel (16) to rotate, the driving belt wheel (16) drives a driven belt wheel (5) to rotate through a conveying belt, the driven belt wheel (5) drives a hollow rotating shaft (4) to rotate, the upper end of the hollow rotating shaft (4) is in threaded connection with a second air inlet pipe (3), the second air inlet pipe (3) is in rotational connection with a sleeve (2), the hollow rotating shaft (4) can rotate while air is ensured to be fed, pressurized air is directly discharged into a flotation machine through an air outlet hole (4-1) at the lower part of the hollow rotating shaft (4), a filtering cylinder assembly is clamped at the lower end of the hollow rotating shaft (4) through the matching of a buckle (13-1) and a clamping groove (4-2), the outer diameter of a filtering sieve (17) is the same as the inner diameter of the hollow rotating shaft (4), and the height of the filtering sieve (17) is, driven pulley (5) drive hollow pivot (4) and rotate, and hollow pivot (4) are through stirring vane (11) stirring liquid, make air and mineral liquid mix more evenly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706476.5A CN108855634B (en) | 2018-07-02 | 2018-07-02 | Novel flotation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810706476.5A CN108855634B (en) | 2018-07-02 | 2018-07-02 | Novel flotation machine |
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| Publication Number | Publication Date |
|---|---|
| CN108855634A CN108855634A (en) | 2018-11-23 |
| CN108855634B true CN108855634B (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810706476.5A Active CN108855634B (en) | 2018-07-02 | 2018-07-02 | Novel flotation machine |
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| CN (1) | CN108855634B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114210467B (en) * | 2021-11-10 | 2024-01-23 | 淮北矿业股份有限公司 | Coal slurry flotation device for coal washing and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733199A (en) * | 2009-12-10 | 2010-06-16 | 北京矿冶研究总院 | Air distributor for flotation machine |
| CN202398434U (en) * | 2011-11-23 | 2012-08-29 | 北矿机电科技有限责任公司 | Upper inflating system of flotation machine and flotation machine with same |
| CN202937820U (en) * | 2012-11-28 | 2013-05-15 | 灵宝金源矿业股份有限公司 | Shaft protection device of flotation machine |
| CN203686139U (en) * | 2013-12-26 | 2014-07-02 | 重庆建设摩托车股份有限公司 | All-terrain axle transmission sealing structure |
| EP3025786A1 (en) * | 2014-11-28 | 2016-06-01 | Omya International AG | Apparatus for simultaneous grinding and froth flotation |
| CN206652613U (en) * | 2016-12-02 | 2017-11-21 | 福建省建瓯市闽佳矿业有限公司 | A kind of environmentally friendly flotation unit of Pb-Zn deposits |
| CN207188011U (en) * | 2017-05-26 | 2018-04-06 | 南召中釉新材料有限公司 | A kind of ore dressing flotation device of energy-conserving and environment-protective |
-
2018
- 2018-07-02 CN CN201810706476.5A patent/CN108855634B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733199A (en) * | 2009-12-10 | 2010-06-16 | 北京矿冶研究总院 | Air distributor for flotation machine |
| CN202398434U (en) * | 2011-11-23 | 2012-08-29 | 北矿机电科技有限责任公司 | Upper inflating system of flotation machine and flotation machine with same |
| CN202937820U (en) * | 2012-11-28 | 2013-05-15 | 灵宝金源矿业股份有限公司 | Shaft protection device of flotation machine |
| CN203686139U (en) * | 2013-12-26 | 2014-07-02 | 重庆建设摩托车股份有限公司 | All-terrain axle transmission sealing structure |
| EP3025786A1 (en) * | 2014-11-28 | 2016-06-01 | Omya International AG | Apparatus for simultaneous grinding and froth flotation |
| CN206652613U (en) * | 2016-12-02 | 2017-11-21 | 福建省建瓯市闽佳矿业有限公司 | A kind of environmentally friendly flotation unit of Pb-Zn deposits |
| CN207188011U (en) * | 2017-05-26 | 2018-04-06 | 南召中釉新材料有限公司 | A kind of ore dressing flotation device of energy-conserving and environment-protective |
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| CN108855634A (en) | 2018-11-23 |
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Effective date of registration: 20200915 Address after: 265400 No. 599, Wenquan Road, Zhaoyuan, Shandong, Yantai Applicant after: ZHAOYUAN JINFENG GOLD MINING MACHINERY EQUIPMENT Co.,Ltd. Address before: 450000 Unit 702, Building 7, Phase 1, Jinhe Garden, West Fourth Ring Road and Mentang Road Intersection, Zhengzhou High-tech Industrial Development Zone, Henan Province Applicant before: ZHENGZHOU ZHIJIN ELECTRONIC TECHNOLOGY Co.,Ltd. |
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