CN215408755U - Sand making and filling equipment for tailless mine construction - Google Patents
Sand making and filling equipment for tailless mine construction Download PDFInfo
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- CN215408755U CN215408755U CN202121950962.5U CN202121950962U CN215408755U CN 215408755 U CN215408755 U CN 215408755U CN 202121950962 U CN202121950962 U CN 202121950962U CN 215408755 U CN215408755 U CN 215408755U
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- 238000011049 filling Methods 0.000 title claims abstract description 63
- 239000004576 sand Substances 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 24
- 238000012546 transfer Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 238000003860 storage Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 239000004566 building material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 238000005429 filling process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000007726 management method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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Abstract
The utility model discloses sand making and filling equipment for tailings-free mine construction, which comprises a tailing concentration device, a cyclone, a transfer belt, a slurry tank, a cementing material bin, a stirring tank and an automatic dosing machine, wherein the top of the left side of the tailing concentration device is connected with a fine tailing transmission pipe through a bolt, the bottom of the fine tailing transmission pipe is connected with a slurry pump through a bolt, the left end of the slurry pump is connected with the slurry tank through a pipeline, the top of the slurry tank is connected with a high-frequency vibration dewatering screen through a pipeline, the top of the high-frequency vibration dewatering screen is provided with the cyclone, the bottom of the high-frequency vibration dewatering screen is provided with the transfer belt, the left side of the bottom of the tailing concentration device is provided with a water tank, the right end of the water tank is provided with a water pump, the water pump and the tailing concentration device are both connected with the stirring tank through pipelines, the technical field of the sand making and filling equipment is improved in the utilization rate of mine tailings, the potential safety hazard problems of mine release pollution and tailing storage are reduced.
Description
Technical Field
The utility model relates to the technical field of sand making and filling equipment, in particular to sand making and filling equipment for tailless mine construction.
Background
In a production system for filling a mine, a filling process is an important design link, the maximized tailing consumption can realize the operation of the mine without a tailing pond on the premise of ensuring the strength of a filling body, and the problems of difficult expropriation of construction land of the mine tailing pond, strict approval and slow period can be solved for a newly-built mine; the problems of short service life of the tailing pond and difficulty in building the tailing pond can be solved for technically improved mines, and meanwhile, the management and maintenance cost of the tailing pond in operation is saved;
in recent years, a series of related policies are issued by countries and related provinces and cities to support tailless mine construction, such as: (1) the 4-month national institute of health and safety service of 2020 prints action plan for national safety production for three years, and requires total amount control on the tailings pond, and in principle, the quantity is only reduced but not increased, and the requirements of treatment, shutdown, management and control and the like are provided for the existing tailings pond; (2) the Shandong province emergency management hall and the like jointly issue a work implementation scheme for preventing and chemically solving the safety risk of the tailings pond in the Shandong province in 4 months in 2020, and the total amount of the tailings pond in the local area is required to be controlled, and the total amount is basically reduced or not increased; (3) the 12-month national institute of 2016 issued the "thirteen-five" ecological environmental protection planning ", proposed the technology of popularizing and implementing tailing pond filling mining, etc., and built a batch of" tailless mines "(realize the mines without tailings or only with few tailings land occupation stockpiling by effective means); (4) in 2013, seven departments such as the State administration of safety supervision and the like jointly release a scheme for deeply developing comprehensive treatment action of the tailing pond, and propose to deeply develop the headquarters closing attack and solidness fight of the tailing pond, accelerate the promotion of comprehensive utilization of tailing resources, realize green development, cyclic development and low-carbon development, promote ecological civilization construction,
meanwhile, the construction of the tailless mine is a necessary condition for the mine to reach the green mine construction, so the sand making and filling equipment in the construction of the tailless mine is very important, but the existing sand making and filling equipment for the construction of the tailless mine still has a lot of problems.
The existing sand making and filling equipment for the construction of the tailless mine has the following problems:
1. the sand making and filling equipment has the problem of insufficient utilization rate of mine tailings;
2. meanwhile, the problems of mine environmental pollution and potential safety hazard of tailing storage exist.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides the sand making and filling equipment for the construction of the tailless mine, which improves the utilization rate of mine tailings and reduces the problems of mine relief pollution and potential safety hazard of tailing storage.
(II) technical scheme
In order to achieve the purpose, the utility model is realized by the following technical scheme: a sand making and filling device for tailless mine construction comprises a tailing concentrating device, a cyclone, a transfer belt, a slurry box, a cementing material bin, a stirring box and an automatic dosing machine, wherein the top of the left side of the tailing concentrating device is connected with a fine tailing transmission pipe through a bolt, the bottom of the fine tailing transmission pipe is connected with a slurry pump through a bolt, the left end of the slurry pump is connected with the slurry box through a pipeline, the top of the slurry box is connected with a high-frequency vibration dewatering screen through a pipeline, the top of the high-frequency vibration dewatering screen is provided with the cyclone, the bottom of the high-frequency vibration dewatering screen is provided with the transfer belt, the left side of the bottom of the tailing concentrating device is provided with a water tank, the right end of the water tank is provided with a water pump, the water pump and the tailing concentrating device are both connected with the stirring box through pipelines, the bottom of the tailing concentrating device is provided with an emptying valve close to the middle end through a pipeline, and the right end of the emptying valve is provided with a bottom flow pump, the left end of the top of the stirring box is provided with an electric regulating valve through a pipeline, and the left end of the electric regulating valve is provided with an electric knife gate valve.
Preferably, the transfer belt and the slurry box are connected with the coarse sand preparation unit through lines, and the cyclone and the high-frequency vibration dewatering screen are connected with the coarse sand preparation unit through lines.
Preferably, the tailing concentrating device and the automatic dosing machine are connected with a fine-grade filling unit through lines, and the cementing bin and the stirring box are connected with the fine-grade filling unit through lines.
Preferably, the left end of the top of the tailing concentrating device is provided with a recycling discharge pipe, and the top of the tailing concentrating device is connected with an automatic dosing machine through a pipeline.
Preferably, the bottom of the stirring tank is provided with a flowmeter near the rear end, the bottom of the stirring tank is provided with a concentration meter near the front end, and the bottom of the stirring tank is connected with a drilling filling port through a pipeline.
Preferably, the right side of the top of the cementing bin is connected with the tank car through a pipeline, and the left end of the bottom of the cementing bin is connected with the stirring box through a pipeline.
(III) advantageous effects
The utility model provides a sand making and filling device for tailless mine construction. The method has the following beneficial effects:
(1) the main principle of the sand making and filling equipment for the construction of the tailless mine is that the mine tailings can be completely utilized by adopting a mode of fine-grain tailings filling and coarse-grain tailings comprehensive utilization, a filling process design for the construction of the mine without the tailings pond adopts fine-grain tailings for filling and coarse-grain tailings comprehensive utilization, low-cost classification and coarse-grain dehydration of the whole tailings are realized, the balance of the tailings for filling and high-efficiency concentration of the fine-grain tailings are ensured, in order to obtain the coarse tailings in the whole tailings, a sand making process with the most mature cost is selected by combining the mine filling and sand making process, namely a cyclone and a high-frequency vibration dehydration screen process, and a classification boundary is determined according to the filling sand consumption ratio, determining the specification of equipment according to the processing capacity, classifying the whole tailings, discharging coarse fraction from the underflow of a cyclone, directly dropping the coarse fraction onto a dewatering screen, performing vibration water filtration to prepare coarse tailings, discharging fine fraction tailings from the overflow of the cyclone, concentrating the fine fraction tailings to the maximum saturated concentration by using a fine fraction concentration device for filling, and mutually matching and operating through related structural parts, so that the utilization rate of mine tailings is improved;
(2) the sand making and filling equipment for the tailless mine construction is provided with a tailing concentrating device, a coarse sand preparation unit and a fine-grained filling unit, after operation, a mine can be operated without a tailing pond for discharging tailings, the mine construction investment, the enterprise land, the management and maintenance cost and the exemption of environmental protection tax can be saved, meanwhile, the mine environmental pollution and the potential safety hazard existing in the tailing pond can be reduced, fine-grained tailings are filled through a solid waste base cementing material, the cementing effect of the solid waste base cementing material has obvious advantages compared with cement, the manufacturing cost is within a bearable range, coarse-grained tailings are used for manufacturing building materials or replacing part of building materials, fine tailings produced by grading in a sorting plant are used as filling aggregates during mining by adopting a filling method, coarse-grained tailings are used for manufacturing building materials or replacing part of building materials, a tailless mine construction scheme can be realized, and the traditional filling process of grading coarse tailings as the aggregates can be overturned, the tailing pond is not needed to be arranged during the mine construction or the tailing pond is used in the mine, so that the potential safety hazard is reduced, and the potential safety hazard problems of pollution and tailing storage of the mine are reduced by the mutual matching of related structural parts.
Drawings
FIG. 1 is an overall structural view of the present invention;
FIG. 2 is a grit preparation unit of the present invention;
fig. 3 shows a fine fraction packing unit according to the utility model.
In the figure: the system comprises a tailing concentrating device-1, a cyclone-2, a transfer belt-3, a slurry tank-4, a slurry pump-5, a cementing bin-6, a tank car-7, an air release valve-8, a underflow pump-9, a stirring tank-10, a coarse sand preparation unit-11, a fine grain filling unit-12, a recycling discharge pipe-13, a high-frequency vibration dewatering screen-14, a fine tailing conveying pipe-15, an automatic chemical adding machine-16, a water tank-17, a water pump-18, an electric knife gate valve-19, an electric regulating valve-20, a flow meter-21, a concentration meter-22 and a drilling filling opening-23.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention provides a technical solution: a sand making and filling device for non-tailing mine construction comprises a tailing concentration device 1, a swirler 2, a transfer belt 3, an ore pulp tank 4, a cementing bin 6, a stirring tank 10 and an automatic chemical adding machine 16, wherein the top of the left side of the tailing concentration device 1 is connected with a fine tailing transmission pipe 15 through a bolt, the fine tailing concentration device 1 can be responsible for continuously receiving and transmitting fine tailings in an area, the bottom of the fine tailing transmission pipe 15 is connected with a slurry pump 5 through a bolt, the left end of the slurry pump 5 is connected with the ore pulp tank 4 through a pipeline, the arrangement of the slurry pump 5 and the ore pulp tank 4 can keep the pressurization and actuation stability during transmission, the top of the ore pulp tank 4 is connected with a high-frequency vibration dewatering screen 14 through a pipeline, the top of the high-frequency vibration dewatering screen 14 is provided with the swirler 2, and the mine tailings can be completely utilized by adopting a mode of fine-fraction tailing filling and coarse-fraction tailing comprehensive utilization, a filling process design for mine construction application without a tailing pond adopts fine-fraction tailings for filling and comprehensive utilization of coarse-fraction tailings, realizes low-cost classification and coarse-fraction dehydration of full tailings, ensures the quantity balance of the tailings for filling and high-efficiency concentration of the fine-fraction tailings, a transfer belt 3 is arranged at the bottom of a high-frequency vibration dewatering screen 14 and can continuously receive and transfer the tailings from the bottom end, a water tank 17 is arranged on the left side of the bottom of a tailing concentrating device 1, a water pump 18 is arranged at the right end of the water tank 17, the water tank 17 and the water pump 18 can continuously provide water required for operation for equipment, the water pump 18 and the tailing concentrating device 1 are both connected with a stirring box 10 through pipelines, final mixing and stirring can be carried out in the region of the stirring box 10, an emptying valve 8 is arranged at the position close to the middle end of the bottom of the tailing concentrating device 1 through a pipeline, a bottom flow pump 9 is arranged at the right end of the emptying valve 8, and the bottom flow pump 9 are matched to keep the transmission stability between the tailing concentrating device 1 and the stirring box 10, the left end of the top of the stirring box 10 is provided with an electric regulating valve 20 through a pipeline, the left end of the electric regulating valve 20 is provided with an electric knife gate valve 19, and the electric regulating valve 20 is matched with the electric knife gate valve to keep quick termination and quick opening control during transmission.
The conveyer belt 3 and the slurry box 4 are connected with a coarse sand preparation unit 11 through lines, the cyclone 2 and the high-frequency vibration dewatering screen 14 are connected with the coarse sand preparation unit 11 through lines, and the regional multi-device assembly can be controlled by the coarse sand preparation unit 11 in an electric automatic mode.
The tailing concentrating device 1 and the automatic dosing machine 16 are connected with the fine-grain filling unit 12 through lines, the cementing bin 6 and the stirring box 10 are connected with the fine-grain filling unit 12 through lines, and the regional multi-device assembly can be controlled by the fine grains and the filling unit in an electric automatic mode.
1 top left end of tailings enrichment facility is equipped with reuse discharge pipe 13, 1 top of tailings enrichment facility passes through pipe connection automatic reagent feeding machine 16, and reuse discharge pipe 13 can discharge the sand material, returns factory's reuse, and automatic reagent feeding machine 16 can continuously carry out the interpolation of auxiliary medicine to tailings enrichment facility 1.
The right side of the top of the cementing bin 6 is connected with a tank truck 7 through a pipeline, the left end of the bottom of the cementing bin 6 is connected with a stirring box 10 through a pipeline, the tank truck 7 can transfer and transport sand in the cementing bin 6 externally, and the region of the stirring box 10 can continuously receive the sand from the cementing bin 6.
The working principle is as follows: when in operation, the tailing concentrating device 1, the coarse sand preparation unit 11 and the fine-grain filling unit 12 are arranged, so that mine construction of a tailing pond or tailing discharge to the tailing pond can be avoided, the main principle is that the fine-grain tailing filling and coarse-grain tailing comprehensive utilization modes are adopted to realize the complete utilization of mine tailings, the filling process design applied to mine construction without a tailing pond adopts the fine-grain tailing filling and coarse-grain tailing comprehensive utilization modes to realize the low-cost classification and coarse-grain dehydration of the whole tailing, ensure the balance of the tailing amount for filling and the high-efficiency concentration of the fine grain, in order to obtain the coarse tailing in the whole tailing, the most mature and most economical dehydration process of the dehydration process, namely the '2 + high-frequency vibration sieve 14' process is selected in combination with the mine filling and sand preparation process, the classification boundary is determined according to the filling sand consumption ratio, the equipment specification is determined according to the processing capacity, after the whole tailings are classified, coarse fraction is discharged from the underflow of the cyclone 2 and then directly falls onto a dewatering screen, coarse tailings can be prepared after vibration water filtration, fine fraction tailings are discharged through the overflow of the cyclone 2 and need to be concentrated to the maximum saturated concentration by a fine fraction concentrating device for filling, after operation, a mine can be used for discharging tailings without a tailing pond, mine construction investment, enterprise land, management and maintenance cost and exemption from environmental protection tax are saved, meanwhile, mine environmental pollution and potential safety hazards of the tailing pond can be reduced, fine fraction tailings are filled by solid waste base cementing materials, the cementing effect of the solid waste base cementing materials is obviously superior to that of cement, the manufacturing cost is within a bearable range, the coarse fraction tailings are used for manufacturing building materials or replacing part of building materials, and the fine tailings produced by classification in a factory are used as filling aggregates when mining is adopted in a filling method, the coarse fraction is used for manufacturing building materials or replacing part of building materials, a tailless mine construction scheme can be realized, the traditional filling process of using classified coarse tailings as aggregates is overturned, a tailing pond can be omitted during mine construction, or tailing discharge can be omitted when the mine is in use, so that potential safety hazards are reduced.
The utility model comprises the following steps: a tailing concentrating device-1, a swirler-2, a transfer belt-3, a slurry tank-4, a slurry pump-5, a cementing bin-6, a tank car-7, an emptying valve-8, a underflow pump-9, a stirring tank-10, a coarse sand preparation unit-11, a fine grain filling unit-12, a recycling discharge pipe-13, a high-frequency vibration dewatering screen-14, a fine tailing transmission pipe-15, an automatic chemical adding machine-16, a water tank-17, a water pump-18, an electric knife gate valve-19, an electric regulating valve-20, a flow meter-21, a concentration meter-22 and a drilling filling opening-23, wherein the parts are all universal standard parts or parts known by technical personnel in the field, and the structure and the principle of the parts can be known by technical manuals or conventional experimental methods, the utility model solves the problems that 1, the prior sand making and filling equipment for the construction of the tailless mine has insufficient help of the sand making and filling equipment for the utilization rate of mine tailings, and 2, the prior sand making and filling equipment for the construction of the tailless mine has the problems of mine environmental pollution and potential safety hazard of tailing inventory.
While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a system sand filling equipment for there is not tail mine construction which characterized in that: comprises a tailing concentrating device (1), a cyclone (2), a transfer belt (3), a slurry tank (4), a cementing bin (6), a stirring box (10) and an automatic dosing machine (16), wherein the top of the left side of the tailing concentrating device (1) is connected with a fine tailing transmission pipe (15) through a bolt, the bottom of the fine tailing transmission pipe (15) is connected with a slurry pump (5) through a bolt, the left end of the slurry pump (5) is connected with the slurry tank (4) through a pipeline, the top of the slurry tank (4) is connected with a high-frequency vibration dewatering screen (14) through a pipeline, the top of the high-frequency vibration dewatering screen (14) is provided with the cyclone (2), the bottom of the high-frequency vibration dewatering screen (14) is provided with the transfer belt (3), the left side of the bottom of the tailing concentrating device (1) is provided with a water pool (17), the right end of the water pool (17) is provided with a water pump (18), the water pump (18) and the tailing concentrating device (1) are both connected with the stirring box (10) through pipelines, the tail sand concentrating device is characterized in that an emptying valve (8) is arranged at the bottom of the tail sand concentrating device (1) close to the middle end through a pipeline, an underflow pump (9) is arranged at the right end of the emptying valve (8), an electric regulating valve (20) is arranged at the left end of the top of the stirring box (10) through a pipeline, and an electric knife gate valve (19) is arranged at the left end of the electric regulating valve (20).
2. The sand making and filling apparatus for tailless mine construction according to claim 1, wherein: transport belt (3) and ore pulp case (4) and all through line connection coarse sand preparation unit (11), swirler (2) all through line connection coarse sand preparation unit (11) with high-frequency vibration dewatering screen (14).
3. The sand making and filling apparatus for tailless mine construction according to claim 1, wherein: the tailing concentrating device (1) and the automatic dosing machine (16) are connected with a fine-grain filling unit (12) through lines, and the cementing bin (6) and the stirring box (10) are connected with the fine-grain filling unit (12) through lines.
4. The sand making and filling apparatus for tailless mine construction according to claim 1, wherein: the left end of the top of the tailing concentrating device (1) is provided with a recycling discharge pipe (13), and the top of the tailing concentrating device (1) is connected with an automatic dosing machine (16) through a pipeline.
5. The sand making and filling apparatus for tailless mine construction according to claim 1, wherein: agitator tank (10) bottom is close to rear end department and is equipped with flowmeter (21), agitator tank (10) bottom is close to front end department and is equipped with concentration meter (22), agitator tank (10) bottom is through tube coupling drilling fill opening (23).
6. The sand making and filling apparatus for tailless mine construction according to claim 1, wherein: the left end of the bottom of the cementing bin (6) is connected with the stirring box (10) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121950962.5U CN215408755U (en) | 2021-08-19 | 2021-08-19 | Sand making and filling equipment for tailless mine construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121950962.5U CN215408755U (en) | 2021-08-19 | 2021-08-19 | Sand making and filling equipment for tailless mine construction |
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| Publication Number | Publication Date |
|---|---|
| CN215408755U true CN215408755U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121950962.5U Active CN215408755U (en) | 2021-08-19 | 2021-08-19 | Sand making and filling equipment for tailless mine construction |
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| CN (1) | CN215408755U (en) |
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2021
- 2021-08-19 CN CN202121950962.5U patent/CN215408755U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A kind of sand making and filling equipment for tailless mine construction Effective date of registration: 20220729 Granted publication date: 20220104 Pledgee: Postal Savings Bank of China Limited Yantai Laishan District sub branch Pledgor: JINJIAN ENGINEERING DESIGN Co.,Ltd. Registration number: Y2022980011612 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20220104 Pledgee: Postal Savings Bank of China Limited Yantai Laishan District sub branch Pledgor: JINJIAN ENGINEERING DESIGN Co.,Ltd. Registration number: Y2022980011612 |