CN109909150B - Quartz sand production process - Google Patents
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- CN109909150B CN109909150B CN201910306486.4A CN201910306486A CN109909150B CN 109909150 B CN109909150 B CN 109909150B CN 201910306486 A CN201910306486 A CN 201910306486A CN 109909150 B CN109909150 B CN 109909150B
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Abstract
The invention relates to a quartz sand production process, which comprises the following steps: a. coarse screening: performing primary screening on the crushed quartz sand, wherein the primary screening adopts a linear vibrating screen to screen out the quartz sand with a section of 20-100 meshes; b. washing with water: putting the quartz sand with the section of 20-100 meshes into water washing equipment for cleaning and conveying out; c. and (3) dehydrating: the water washing equipment comprises a dehydration device, and the quartz sand is dehydrated after flowing out of the water washing equipment; d. drying: drying the dehydrated quartz sand; e. fine screening: and putting the dried quartz sand into a grading vibration sieve for secondary screening to screen out the quartz sand with different particle sizes. The invention has the effect of reducing heat consumption in the drying process.
Description
Technical Field
The invention relates to the technical field of quartz sand production, in particular to a quartz sand production process.
Background
The quartz sand is a silicate mineral with hardness, wear resistance and stable chemical properties, the main mineral component of the quartz sand is SiO2, the color of the quartz sand is milky white or colorless and semitransparent, and the quartz sand is an important industrial mineral raw material and is a non-chemical dangerous product. The application field of the quartz sand is very wide, the quartz sand is mainly used in the building industry, the glass manufacturing industry, the ceramic industry and the casting industry, and the demand of the quartz sand is large.
In the prior art, in the production process of quartz sand, stone is firstly primarily crushed by a coarse crusher, then the produced coarse material is conveyed to a fine crusher by a belt conveyor for further crushing, the finely crushed stone enters a vibrating screen to sieve out two kinds of stones, the stones meeting the feeding granularity of a sand making machine are made into sand by the sand making machine, and the other part of returned materials are finely crushed to prepare the quartz sand; and (3) carrying out coarse screening on the quartz sand after the fine crushing, cleaning and drying the quartz sand after the coarse screening by a sand washer, carrying out fine screening on the dried quartz sand to obtain quartz sand with various particle sizes, improving the grade of the quartz sand, and packaging the quartz sand after inspection.
However, in the prior art, the quartz sand has more surface moisture after being cleaned, and is directly dried after being cleaned, and more heat required for drying evaporates the moisture.
Disclosure of Invention
The invention aims to provide a quartz sand production process which has the effect of reducing heat consumption in the drying process.
The above object of the present invention is achieved by the following technical solutions:
a quartz sand production process comprises the following steps: a. coarse screening: performing primary screening on the crushed quartz sand, wherein the primary screening adopts a linear vibrating screen to screen out the quartz sand with a section of 20-100 meshes; b. washing with water: putting the quartz sand with the section of 20-100 meshes into water washing equipment for cleaning and conveying out; c. and (3) dehydrating: the water washing equipment comprises a dehydration device, and the quartz sand is dehydrated after flowing out of the water washing equipment; d. Drying: drying the dehydrated quartz sand; e. fine screening: and putting the dried quartz sand into a grading vibration sieve for secondary screening to screen out the quartz sand with different particle sizes.
Through adopting above-mentioned technical scheme, during the use, quartz sand is after the coarse screening, the quartz sand that will need the granularity of washing to satisfy the requirement is selected, quartz sand enters into washing equipment, washing equipment is through carrying out the washing with quartz sand, because washing equipment includes dewatering device, the quartz sand that washing equipment flowed out dewaters through dewatering device, thereby the moisture content in the quartz sand has been reduced, in follow-up stoving step, the quartz sand moisture content of stoving treatment is less, thereby the heat that needs to consume is less, can reach same stoving effect, conveniently carry out the secondary screening to quartz sand among the fine screening process, sieve out the quartz sand of different particle sizes.
The invention is further configured to: the water washing equipment comprises a water washing device, the water washing device comprises an inner cylinder, a conveying shaft and a spiral blade, the spiral blade is fixed on the conveying shaft, the center line of the conveying shaft is overlapped with the center line of the inner cylinder, the spiral blade is matched with the inner wall of the inner cylinder, and the conveying shaft is connected with a driving motor; the inner tube is arranged obliquely to the horizontal plane, one end, located at the tail end of the helical blade, of the inner tube is higher than one end, located at the starting end of the helical blade, of the inner tube, and the feed inlet is formed in the lower end of the inner tube.
By adopting the technical scheme, the feeding hole formed in the inner barrel is used for conveying the quartz sand into the inner barrel, when clear water is added into the inner barrel, the end, located at the starting end of the helical blade, of the inner barrel is lower, so that the clear water can be stored in the inner barrel, the quartz sand entering the inner barrel is soaked in the clear water, and the quartz sand is conveyed to the tail end of the inner barrel through the rotation of the helical blade on the conveying shaft.
The invention is further configured to: carry the inside hollow structure that is of axle, carry the one end that the axle kept away from driving motor to be connected with rotary joint, rotary joint is connected with the inlet tube, has seted up the apopore on the lateral wall of carrying the axle, apopore and the center intercommunication of carrying the axle.
Through adopting above-mentioned technical scheme, carry the inside of axle to be hollow structure to at the end connection who carries the axle at rotary joint, the inlet tube passes through rotary joint and carries the clear water to the inside of carrying the axle, outwards flows out by the apopore of seting up on the lateral wall of carrying the axle again, washs quartz sand, improves the cleaning performance to quartz sand.
The invention is further configured to: the dewatering device comprises a dewatering cylinder, the dewatering cylinder is conical, the central line of the dewatering cylinder coincides with the central line of the conveying shaft, the small end of the dewatering cylinder is provided with a connecting cylinder, the connecting cylinder is arranged at one end of the inner cylinder at the tail end of the spiral blade in a matching mode, the dewatering cylinder is fixed on the conveying shaft, and the inner side of the dewatering cylinder is horizontally arranged on the element line at the lowest part.
Through adopting above-mentioned technical scheme, the dewatering cylinder is the toper, and the dewatering cylinder is fixed on carrying the axle, and the connecting cylinder of the tip installation of dewatering cylinder stretches the inner tube, makes things convenient for in quartz sand enters into the dewatering cylinder through the connecting cylinder to the dewatering cylinder rotates under the drive of carrying the axle, thereby makes the quartz sand moisture content in the dewatering cylinder reduce, and at the setting of the plain line level of the inboard lower most of dewatering cylinder, reduces water and flows downwards along the dewatering cylinder inner wall.
The invention is further configured to: the water tank is arranged below the dewatering cylinder, the water tank is connected with a water outlet pipe, the water outlet pipe is connected with a water pump, and the outlet of the water pump is connected to one end, away from the rotary joint, of the water inlet pipe.
Through adopting above-mentioned technical scheme, the dewatering cylinder below sets up the water tank, and the water tank can be retrieved from dewatering cylinder water-logging down, and the water pump suction of reusing after the water of retrieving deposits in the water tank to the water consumption of saving washing process.
The invention is further configured to: at least two partition plates are arranged in the water tank, the partition plates are divided into multistage settling chambers, weir notches are formed in the upper portions of the partition plates, and the water outlet pipe is connected to the final stage settling chamber.
By adopting the technical scheme, the multistage settling chamber is formed in the water tank, and the weir crest arranged at the upper part of the partition plate is used for connecting the multistage settling chamber, so that water entering the water outlet pipe is cleaner after the water in the multistage settling chamber is settled for multiple times.
The invention is further configured to: the outer cover of inner tube is equipped with fixed sleeve, is provided with the filling tube on the fixed sleeve, and the lower extreme and the feed inlet of filling tube are corresponding, the inner tube rotates to be connected in fixed sleeve, be connected with drive assembly between inner tube and the transport axle.
Through adopting above-mentioned technical scheme, the outside of inner tube is provided with fixed sleeve, and inner tube transportation connection is provided with the filling tube on fixed sleeve, and when the inner tube rotates the round, the feed inlet homoenergetic on the inner tube can once with the feed inlet intercommunication, makes things convenient for the entering of quartz sand, and when the inner tube rotated simultaneously, can make the inside quartz sand of inner tube upwards roll to the cleaning performance who makes quartz sand is better.
The invention is further configured to: the transmission assembly comprises a gear ring, a sun wheel and a planetary wheel, the gear ring is arranged on the inner wall of the fixed sleeve, the sun wheel is coaxially and fixedly conveyed on the shaft, the planetary wheel is arranged at the end part of the inner barrel, the central line of the gear ring is coincided with the central line of the sun wheel, the planetary wheel is externally meshed with the sun wheel, and the planetary wheel is internally meshed with the gear ring.
Through adopting above-mentioned technical scheme, the sun gear is coaxial to be fixed on carrying the axle, and the sun gear is along with carrying the axle and transporting, and the ring gear is fixed, and the planet wheel setting is on the inner tube, makes the planet wheel drive the inner tube and rotates round sun gear pivoted in-process to the rotation of inner tube is convenient and the direction of rotation of carrying the axle is the same, reduces the inner tube and carries the relative speed of axle, thereby further makes the cleaning time of quartz sand in the inner tube longer, and the cleaning performance is better.
The invention is further configured to: and screening out the quartz sand with different particle sizes, carrying out manual inspection, and packaging the qualified quartz sand.
By adopting the technical scheme, the screened quartz sand with different particle sizes is packaged after being manually inspected, so that the quality of the quartz sand is improved.
In conclusion, the beneficial technical effects of the invention are as follows:
1. after the quartz sand is subjected to coarse screening, screening out the quartz sand which needs to be washed and has the granularity meeting the requirement, enabling the quartz sand to enter washing equipment, washing the quartz sand by the washing equipment, and dehydrating the quartz sand flowing out of the washing equipment by the dehydrating device because the washing equipment comprises the dehydrating device, so that the moisture content in the quartz sand is reduced, and in the subsequent drying step, the moisture content of the dried quartz sand is less, so that the heat required to be consumed is less;
2. the fixed sleeve is arranged outside the inner barrel, the inner barrel is connected to the fixed sleeve in a transfer mode, the feeding pipe is arranged on the fixed sleeve, the feeding hole in the inner barrel can be communicated with the feeding hole once when the inner barrel rotates for one circle, quartz sand can enter conveniently, and meanwhile, the quartz sand in the inner barrel can roll upwards when the inner barrel rotates, so that the cleaning effect of the quartz sand is better;
3. through the sun gear coaxial fixation on carrying the axle, the sun gear is along with carrying the axle and transporting, and the ring gear is fixed, and the planet wheel setting is on the inner tube, makes the planet wheel drive the inner tube and rotates round sun gear pivoted in-process to the rotation of inner tube is convenient the same with the direction of rotation of carrying the axle, reduces the inner tube and carries the relative speed of axle, thereby further makes the cleaning time of quartz sand in the inner tube longer, and the cleaning performance is better.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view showing a connection structure of the water washing apparatus and the dewatering apparatus;
fig. 3 is a schematic sectional view of the plane a-a in fig. 2.
In the figure, 1, a water washing device; 11. an inner barrel; 111. a feed inlet; 12. a delivery shaft; 121. a water outlet hole; 13. fixing the sleeve; 131. a feed tube; 14. a transmission assembly; 141. a ring gear; 142. a sun gear; 143. a planet wheel; 15. a helical blade; 2. a dewatering device; 21. a dewatering drum; 211. a filter layer; 212. a holder; 22. a connecting cylinder; 23. a strut; 3. a drive motor; 41. a rotary joint; 42. a water inlet pipe; 43. a water tank; 431. a partition plate; 432. a settling chamber; 433. a weir crest; 44. a water outlet pipe; 45. and (4) a water pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the quartz sand production process disclosed by the invention comprises coarse screening, water washing, dehydration, drying, fine screening, inspection and packaging, wherein the coarse screening is to perform primary screening on crushed quartz sand, a linear vibrating screen is adopted in the coarse screening process, the screening mesh number of the linear vibrating screen is 20-100 meshes, and all the quartz sand with the grain size of 20-100 meshes is screened out through the primary screening; the step of washing and dewatering adopts washing equipment, the washing equipment comprises a washing device 1 and a dewatering device 2, quartz sand is added into the washing equipment from the position of the washing device 1 and then flows out from the position of the dewatering device 2, so that the quartz sand is washed and dewatered sequentially, and the water content of the quartz sand after the washing step is reduced; drying the quartz sand after flowing out of the water washing device through a drying device, wherein the quartz sand needs to be heated in the drying process, so that the water on the surface of the quartz sand is lost, and the quartz sand is dried; the dried quartz sand is put into a grading vibrating screen, secondary screening is carried out in the grading vibrating screen, the quartz sand screened for the second time can be separated into different particle sizes, manual inspection is respectively carried out on the quartz sand with different particle sizes, the inspection is completed, the qualified quartz sand is packaged, and the transportation and the storage of the quartz sand are convenient.
Referring to fig. 2 and 3, the washing device 1 includes an inner cylinder 11, the inner cylinder 11 is disposed obliquely to a horizontal plane, a feed inlet 111 is disposed on a lower end side wall of the inner cylinder 11, the feed inlet 111 is used for adding quartz sand to be washed into a middle portion of the inner cylinder 11, a conveying shaft 12 is disposed in the middle portion of the inner cylinder 11, a center line of the conveying shaft 12 coincides with a center line of the inner cylinder 11, the conveying shaft 12 is rotatably supported on the inner cylinder 11, one end of the conveying shaft 12 close to the feed inlet 111 extends out of the inner cylinder 11, a fixing sleeve 13 is disposed outside the inner cylinder 11, the fixing sleeve 13 is supported on the ground, a center line of the fixing sleeve 13 coincides with a center line of the inner cylinder 11, the inner cylinder 11 is inserted into the fixing sleeve 13, and the inner cylinder 11 is rotatably supported in the fixing sleeve 13. A transmission component 14 is arranged between the inner cylinder 11 and the conveying shaft 12, one end of the conveying shaft 12 close to the feeding hole 111 is provided with a driving motor 3, the driving motor 3 is started, the driving motor 3 drives the conveying shaft 12 to rotate, and the conveying shaft 12 drives the inner cylinder 11 to rotate simultaneously through the transmission component 14. The clear water is added into the inner barrel 11, the clear water washes the quartz sand of the inner barrel 11, the quartz sand can rotate along with the inner wall of the inner barrel 11 from bottom to top in the rotating process of the inner barrel 11, and the quartz sand falls into the clear water when reaching a higher position, so that the cleaning effect on the quartz sand is better.
Referring to fig. 3, a spiral blade 15 is coaxially and fixedly disposed on the conveying shaft 12, the spiral blade 15 is engaged with the inner wall of the inner cylinder 11, the spiral blade 15 can convey the quartz sand along the length direction of the inner cylinder 11 during the rotation of the conveying shaft 12, the end of the spiral blade 15 is the highest point of the inner cylinder 11, and the start end of the spiral blade 15 is the lowest point of the inner cylinder 11. Carry axle 12 to be hollow structure, carry axle 12 to keep away from driving motor 3's one end and be provided with rotary joint 41, rotary joint 41 is connected with inlet tube 42, has seted up apopore 121 on carrying the lateral wall of axle 12, apopore 121 and the center intercommunication of carrying axle 12. The clean water flowing into the water inlet pipe 42 enters the conveying shaft 12 through the rotary joint 41 and is sprayed out of the water outlet hole 121 to clean the quartz sand in the inner cylinder 11, so that the cleaning efficiency of the quartz sand is improved.
Referring to fig. 2 and 3, the dewatering device 2 includes a dewatering cylinder 21, the dewatering cylinder 21 is in a cone shape, the inner layer of the dewatering cylinder 21 is a filter layer 211, and the outer layer of the dewatering cylinder 21 is a retainer 212. The central line of dehydration section of thick bamboo 21 and the coincidence of the central line of inner tube 11, the tip of dehydration section of thick bamboo 21 is provided with connecting cylinder 22, connecting cylinder 22 is connected with the tip of dehydration section of thick bamboo 21, connecting cylinder 22 stretches into in the inner tube 11, and the outer wall of connecting cylinder 22 and the inner wall laminating of inner tube 11, connecting cylinder 22 is located the one end that inner tube 11 is close to helical blade 15 end, dehydration section of thick bamboo 21 is fixed on carrying axle 12 through a plurality of branches 23 that set up in dehydration section of thick bamboo 21, when carrying axle 12 and rotating, carry axle 12 to drive dehydration section of thick bamboo 21 and rotate, make the quartz sand that is located dehydration section of thick bamboo 21 dewater, and remove to the direction of keeping away from connecting cylinder 22 along dehydration section of thick bamboo 21 at the in-process of dehydration, flow out in the dewatering device 2. In order to prevent the water in the dewatering cylinder 21 from flowing to the end of the dewatering cylinder 21 away from the connecting cylinder 22 along the inner wall of the dewatering cylinder 21, the lowest plain line of the inner wall of the dewatering cylinder 21 is horizontally arranged. When the clean water enters the dewatering cylinder 21, the clean water flows out downwards through the side wall of the dewatering cylinder 21.
Referring to fig. 2 and 3, a water tank 43 is arranged below the dewatering cylinder 21, at least two partition plates 431 are arranged in the water tank 43, the water tank 43 is divided into multiple stages of settling chambers 432 by the partition plates 431, a weir 433 is arranged on the upper portion of the partition plates 431, the settling chambers 432 are communicated through the weir 433, a water outlet pipe 44 is connected in the last stage of settling chamber 432, one end of the water outlet pipe 44, which is far away from the settling chamber 432, is connected with a water pump 45, and an outlet of the water pump 45 is connected with one end of the water inlet pipe 42, which is far away from the rotary joint 41. Can utilize in water pump 45 inhales the inlet tube 42 with the water in the water tank 43 again to in the water that flows out from dewatering cylinder 21 gets into first one-level deposit room 432, the water that flows out from the department of dewatering cylinder 21 can enter into water tank 43, and subsides through multiunit deposit room 432, reduces the waste of water resource.
Referring to fig. 3, a feed pipe 131 is fixedly disposed on a side wall of the fixed sleeve 13, and during the rotation of the inner barrel 11, a lower end of the feed pipe 131 can correspond to the feed port 111, and the quartz sand in the feed pipe 131 can enter the inner barrel 11 through the feed port 111. The transmission assembly 14 comprises a gear ring 141, a sun gear 142 and a planet gear 143, the sun gear 142 is coaxially fixed on the conveying shaft 12, the gear ring 141 is arranged on the inner wall of the fixed sleeve 13, the sun gear 142 coincides with the center line of the gear ring 141, the planet gear 143 is positioned between the sun gear 142 and the gear ring 141, the planet gear 143 is rotatably supported on the end surface of the lower end of the inner cylinder 11, the planet gear 143 is externally meshed with the sun gear 142, and the planet gear 143 is internally meshed with the gear ring 141. When the driving motor 3 drives the conveying shaft 12 to rotate, the sun gear 142 on the conveying shaft 12 rotates, the planet gear 143 drives the inner cylinder 11 to rotate, and the rotating directions of the inner cylinder 11 and the planet gear 143 are the same, so that the speed difference between the inner cylinder 11 and the conveying shaft 12 is reduced, the conveying of the quartz sand in the inner cylinder 11 is reduced under the condition that the conveying shaft 12 rotates fast to dewater, and the washing effect of the quartz sand is better.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (4)
1. A quartz sand production process is characterized in that: the method comprises the following steps:
a. coarse screening: performing primary screening on the crushed quartz sand, wherein the primary screening adopts a linear vibrating screen to screen out the quartz sand with a section of 20-100 meshes;
b. washing with water: putting the quartz sand with the section of 20-100 meshes into water washing equipment for cleaning and conveying out;
c. and (3) dehydrating: the water washing equipment comprises a dehydration device, and the quartz sand is dehydrated after flowing out of the water washing equipment;
d. drying: drying the dehydrated quartz sand;
e. fine screening: putting the dried quartz sand into a grading vibration sieve for secondary screening to screen out quartz sand with different grain diameters;
the water washing equipment comprises a water washing device (1), wherein the water washing device (1) comprises an inner barrel (11), a conveying shaft (12) and a spiral blade (15), the spiral blade (15) is fixed on the conveying shaft (12), the central line of the conveying shaft (12) is superposed with the central line of the inner barrel (11), the spiral blade (15) is matched with the inner wall of the inner barrel (11), and the conveying shaft (12) is connected with a driving motor (3); the inner cylinder (11) is arranged obliquely to the horizontal plane, one end of the inner cylinder (11) positioned at the tail end of the helical blade (15) is higher than one end positioned at the starting end of the helical blade (15), and a feed inlet (111) is formed in the lower end of the inner cylinder (11);
a fixed sleeve (13) is sleeved outside the inner cylinder (11), a feeding pipe (131) is arranged on the fixed sleeve (13), the lower end of the feeding pipe (131) corresponds to the feeding hole (111), the inner cylinder (11) is rotatably connected in the fixed sleeve (13), and a transmission assembly (14) is connected between the inner cylinder (11) and the conveying shaft (12);
the conveying shaft (12) drives the inner cylinder (11) to rotate simultaneously through the transmission component (14);
the conveying shaft (12) is internally of a hollow structure, one end, far away from the driving motor (3), of the conveying shaft (12) is connected with a rotary joint (41), the rotary joint (41) is connected with a water inlet pipe (42), a water outlet hole (121) is formed in the side wall of the conveying shaft (12), and the water outlet hole (121) is communicated with the center of the conveying shaft (12);
the dehydration device (2) comprises a dehydration cylinder (21), the dehydration cylinder (21) is conical, the central line of the dehydration cylinder (21) is superposed with the central line of the conveying shaft (12), the small end of the dehydration cylinder (21) is provided with a connecting cylinder (22), the connecting cylinder (22) is arranged at one end of the inner cylinder (11) positioned at the tail end of the spiral blade (15) in a matching way, the dehydration cylinder (21) is fixed on the conveying shaft (12), and the inner side of the dehydration cylinder (21) and the plain line positioned at the lowest part are horizontally arranged;
the transmission assembly (14) comprises a gear ring (141), a sun wheel (142) and a planetary wheel (143), the gear ring (141) is arranged on the inner wall of the fixed sleeve (13), the sun wheel (142) is coaxially and fixedly conveyed to the shaft (12), the planetary wheel (143) is arranged at the end of the inner barrel (11), the center line of the gear ring (141) is overlapped with the center line of the sun wheel (142), the planetary wheel (143) is externally meshed with the sun wheel (142), and the planetary wheel (143) is internally meshed with the gear ring (141).
2. The quartz sand production process according to claim 1, characterized in that: a water tank (43) is arranged below the dewatering cylinder (21), the water tank (43) is connected with a water outlet pipe (44), the water outlet pipe (44) is connected with a water pump (45), and the outlet of the water pump (45) is connected to one end, far away from the rotary joint (41), of the water inlet pipe (42).
3. The quartz sand production process according to claim 2, characterized in that: at least two partition plates (431) are arranged in the water tank (43), the water tank (43) is divided into a multi-stage settling chamber (432) by the partition plates (431), a weir notch (433) is formed in the upper portion of each partition plate (431), and the water outlet pipe (44) is connected to the last-stage settling chamber (432).
4. The quartz sand production process according to claim 1, characterized in that: and screening out the quartz sand with different particle sizes, carrying out manual inspection, and packaging the qualified quartz sand.
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| CN113603099A (en) * | 2021-08-17 | 2021-11-05 | 江苏金圣棋盘玻璃科技发展有限公司 | High-purity quartz sand and preparation method thereof |
| CN114100838A (en) * | 2021-10-28 | 2022-03-01 | 三峡昌耀管廊建设有限公司 | Quartz sand grading system and method applied to brick making |
| CN115978985B (en) * | 2023-03-22 | 2023-05-23 | 佛山霖诺环保科技有限公司 | Quartz sand calcination stirring mechanism and calcination device |
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| CN103911816A (en) * | 2012-12-29 | 2014-07-09 | 海尔集团技术研发中心 | Washing machine and washing machine driving method |
| CN208230103U (en) * | 2018-04-16 | 2018-12-14 | 上海宝冶集团有限公司 | Concrete waste material separation system |
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| RU2397966C1 (en) * | 2009-03-20 | 2010-08-27 | Государственное образовательное учреждение высшего профессионального образования "Сибирская государственная автомобильно-дорожная академия (СибАДИ)" | Dry construction mixture |
| CN102211854B (en) * | 2011-03-17 | 2013-07-31 | 李立和 | Dry process scale continuous production process of quartz sand |
| CN107233996A (en) * | 2017-07-23 | 2017-10-10 | 石城县华辉选矿设备制造有限公司 | A kind of double helix dolly |
| CN107385786B (en) * | 2017-08-30 | 2022-03-15 | 青岛海尔洗衣机有限公司 | Speed reducer and washing machine using the same |
| CN107348037B (en) * | 2017-08-31 | 2020-01-10 | 浮梁县瑶里茶叶有限公司 | Tea processing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911816A (en) * | 2012-12-29 | 2014-07-09 | 海尔集团技术研发中心 | Washing machine and washing machine driving method |
| CN208230103U (en) * | 2018-04-16 | 2018-12-14 | 上海宝冶集团有限公司 | Concrete waste material separation system |
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Denomination of invention: A kind of quartz sand production process Effective date of registration: 20220802 Granted publication date: 20211102 Pledgee: Bank of China Limited by Share Ltd. Zhengzhou high tech Development Zone Branch Pledgor: ZHENGZHOU XINZHENG MEIJIU INDUSTRIAL CO.,LTD. Registration number: Y2022980011763 |
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Date of cancellation: 20230825 Granted publication date: 20211102 Pledgee: Bank of China Limited by Share Ltd. Zhengzhou high tech Development Zone Branch Pledgor: ZHENGZHOU XINZHENG MEIJIU INDUSTRIAL CO.,LTD. Registration number: Y2022980011763 |
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| 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 invention: A quartz sand production process Effective date of registration: 20230830 Granted publication date: 20211102 Pledgee: Bank of China Limited by Share Ltd. Xinzheng branch Pledgor: ZHENGZHOU XINZHENG MEIJIU INDUSTRIAL CO.,LTD. Registration number: Y2023980054268 |