CN111170609A - Inflation anti-blocking system and method for grading fine screen mesh - Google Patents
Inflation anti-blocking system and method for grading fine screen mesh Download PDFInfo
- Publication number
- CN111170609A CN111170609A CN202010054468.4A CN202010054468A CN111170609A CN 111170609 A CN111170609 A CN 111170609A CN 202010054468 A CN202010054468 A CN 202010054468A CN 111170609 A CN111170609 A CN 111170609A
- Authority
- CN
- China
- Prior art keywords
- screen
- air
- fine
- mesh
- grading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/55—Cleaning with fluid jets
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
Abstract
The invention relates to an inflation anti-blocking hole system and method for a grading fine screen mesh, and belongs to the technical field of grading of particle materials. The technical scheme is as follows: arranging an aerating device below a screen of the grading fine screen, and intermittently aerating below the screen to enable the screen to swell and fall back; after the meshes of the screen are blocked, the air charging device charges air downwards to the screen, the screen is swelled after the air charging, the meshes of the screen are enlarged after the swelling, fine particle materials clamped in the meshes are discharged, and the meshes of the screen are recovered smoothly; stopping aerating, releasing and falling the screen mesh, and continuously grading the granular materials. The invention has the beneficial effects that: the problem of hole plugging is solved, the grading efficiency is high, and the hole plugging rate of the screen is reduced from more than 80% to less than 20%.
Description
Technical Field
The invention relates to an inflation anti-blocking hole system and method for a grading fine screen mesh, and belongs to the technical field of grading of particle materials.
Background
The vibration grading sieve is an industrially important grading device, and is suitable for screening and grading raw materials and finished products in various industries such as grain, food, chemical industry, sugar manufacturing, mines, coal mines, metallurgy, paper making and the like. The electromagnetic exciting screen in the vibration grading screen is widely applied to product grading in industries such as mines, building materials, traffic, energy, chemical engineering and the like, for example: the fine particle coal (coal slime) of the wet coal preparation process is efficiently dehydrated and dried, and in order to meet the process requirements, the meshes of the screen mesh of the high-frequency fine screen are often selected to be very small (mostly below 80 meshes). The prior art has the following problems: because the mesh size of the grading fine screen is smaller, the screen is easy to block, and the dehydration efficiency is reduced to below 20 percent (the through hole rate is below 20 percent) after the holes are generally blocked, thereby influencing the normal operation of industrial production.
Disclosure of Invention
The invention aims to provide an inflation anti-blocking hole system and method for a grading fine screen mesh.
The technical scheme of the invention is as follows:
the utility model provides a hierarchical fine screen cloth aerifys prevents stifled hole system, contains screen frame, screen cloth and aerating device, and the screen cloth is located the screen frame, is equipped with aerating device below the screen cloth, and aerating device is to the intermittent type inflation of screen cloth down, makes the screen cloth swell and fall back.
The air charging device comprises a spray head, an air blower and a pipeline, wherein the spray head is positioned below the screen and is connected with the air blower through the pipeline.
The screen body is an electromagnetic screen body, and the screen is an electromagnetic screen mesh; more than one set of air charging device is arranged below each electromagnetic screen, the number of the spray heads of each air charging device is more than one, and a plurality of spray heads are randomly arranged and comprise being arranged in a row, being uniformly distributed and the like.
Be equipped with the radome fairing on the shower nozzle, the radome fairing is tubaeform, and the opening is towards the electromagnetic screen cloth.
An aeration anti-blocking hole method for a grading fine screen mesh comprises the following steps:
arranging an aerating device below a screen of the grading fine screen, and intermittently aerating below the screen to enable the screen to swell and fall back; after the meshes of the screen are blocked, the air charging device charges air downwards to the screen, the screen is swelled after the air charging, the meshes of the screen are enlarged after the swelling, fine particle materials clamped in the meshes are discharged, and the meshes of the screen are recovered smoothly; stopping aerating, releasing and falling the screen mesh, and continuously grading the granular materials.
The aerating device regularly inflates air downwards the screen mesh intermittently, so that the screen mesh regularly swells and falls back, and the breathing of the human body is similar to fluctuation. Setting proper intermittent time and inflation time according to the blocking rule of the screened materials to ensure normal production; and the intermittent time and the inflation time can be adjusted in real time according to the change of the on-site logistics.
The air charging device is provided with a nozzle, and air flow is sprayed to the screen to swell the screen.
The grading fine screen is a high-frequency electromagnetic screen and is used for wet coal separation and dewatering and drying fine-particle coal (coal slime). By using the invention, the dehydration efficiency reaches more than 80 percent.
In the wet coal separation, the screen and the screen body form a quasi-seal, in the working process of the screening machine, the coal slime water and the well-tensioned and laid screen make the screening machine in a quasi-seal state, and the screen cannot be completely blocked and cannot be completely sealed due to the drainage pipeline and the like, so the screening machine is called as the quasi-seal; in a quasi-sealing state, the lower surface of the screen is inflated, and the screen swells in a short period after inflation; the aeration is stopped and the screen is released to fall back.
The high-frequency electromagnetic screen adopts a chain screen and consists of a plurality of (for example, six) screens, an air charging device is respectively arranged below each screen, and each screen forms independent swelling and falling. The mesh of the expanded screen is enlarged, fine particles clamped in the mesh are discharged, the inflating device is positioned below the material flow, the fine particle materials separated from the mesh are blown, the fine particle materials are washed away along with water on the screen surface, and the problem of screen hole blockage is solved.
The invention is used for various grading fine sieves, and is particularly suitable for wet screening, concentration and dehydration of high-frequency electromagnetic fine sieves.
The amount of water deposited on the screen increases as the amount of material deposited on the screen increases with the production process. At the moment, the aerating device starts to aerate under the lower screen, the screen is swelled, deposited and blocked materials disappear quickly under the dual actions of aeration and water flushing, and the water amount on the screen is also reduced quickly; stopping aeration, gradually increasing the amount of the blocked materials deposited on the screen along with the production process, and aerating again; the steps are repeated in such a circulating way, and the air inflation and anti-blocking holes of the grading fine screen are realized.
The invention has the beneficial effects that: the air is filled under the screen, the screen is bulged after the air is filled, the meshes of the screen are enlarged after the bulging, fine particle materials clamped in the meshes are discharged and blown, the hole plugging problem is solved, the grading efficiency is high, and the hole plugging rate of the screen is reduced from more than 80% to less than 20%.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of an inflator according to an embodiment of the present invention;
FIG. 3 is a schematic top view of an inflator according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a multi-layer screen according to an embodiment of the present invention;
in the figure: the device comprises a fairing 1, a spray head 2, a pipe hoop 3, a short pipe 4, a rubber hose 5, a first bolt 6, a screen bottom 7, a second bolt 8, a pipe clamp 9, an electromagnetic valve 10, an electromagnetic valve fixing frame 11, a blower 12, a support 13, an electromagnetic screen 14, a hitting belt 15, an electromagnetic screen body 16, a first screen body 17, a second screen body 18, a third screen body 19 and a fourth screen body 20.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
The utility model provides a hierarchical fine screen cloth aerifys prevents stifled hole system, contains screen frame, screen cloth and aerating device, and the screen cloth is located the screen frame, is equipped with aerating device below the screen cloth, and aerating device is to the intermittent type inflation of screen cloth down, makes the screen cloth swell and fall back.
The air charging device comprises a spray head 2, an air blower 12 and a pipeline, wherein the spray head 2 is positioned below the screen mesh and is connected with the air blower 12 through the pipeline.
The screen body is an electromagnetic screen 16, and the screen is an electromagnetic screen 14; more than one set of air charging device is arranged below each electromagnetic screen 14, the number of the spray heads of each air charging device is more than one, and a plurality of spray heads are randomly arranged and comprise being arranged in a row, being uniformly distributed and the like.
Be equipped with radome fairing 1 on shower nozzle 2, the radome fairing is tubaeform, and the opening is towards the electromagnetic screen cloth.
An aeration anti-blocking hole method for a grading fine screen mesh comprises the following steps:
arranging an aerating device below a screen of the grading fine screen, and intermittently aerating below the screen to enable the screen to swell and fall back; after the meshes of the screen are blocked, the air charging device charges air downwards to the screen, the screen is swelled after the air charging, the meshes of the screen are enlarged after the swelling, fine particle materials clamped in the meshes are discharged, and the meshes of the screen are recovered smoothly; stopping aerating, releasing and falling the screen mesh, and continuously grading the granular materials.
The aerating device regularly inflates air downwards the screen mesh intermittently, so that the screen mesh regularly swells and falls back, and the breathing of the human body is similar to fluctuation. Setting proper intermittent time and inflation time according to the blocking rule of the screened materials to ensure normal production; and the intermittent time and the inflation time can be adjusted in real time according to the change of the on-site logistics.
The air charging device is provided with a nozzle, and air flow is sprayed to the screen to swell the screen.
The grading fine screen is a high-frequency electromagnetic screen and is used for wet coal separation and dewatering and drying fine-particle coal (coal slime). By using the invention, the dehydration efficiency reaches more than 80 percent.
In the wet coal separation, the screen and the screen body form a quasi-seal, in the working process of the screening machine, the coal slime water and the well-tensioned and laid screen make the screening machine in a quasi-seal state, and the screen cannot be completely blocked and cannot be completely sealed due to the drainage pipeline and the like, so the screening machine is called as the quasi-seal; in a quasi-sealing state, the lower surface of the screen is inflated, and the screen swells in a short period after inflation; the aeration is stopped and the screen is released to fall back.
The high-frequency electromagnetic screen adopts a chain screen and consists of a plurality of (for example, six) screens, an air charging device is respectively arranged below each screen, and each screen forms independent swelling and falling. The mesh of the expanded screen is enlarged, fine particles clamped in the mesh are discharged, the inflating device is positioned below the material flow, the fine particle materials separated from the mesh are blown, the fine particle materials are washed away along with water on the screen surface, and the problem of screen hole blockage is solved.
The invention is suitable for various grading fine sieves, in particular for wet sieving, concentration and dehydration of high-frequency electromagnetic fine sieves.
The amount of water deposited on the screen increases as the amount of material deposited on the screen increases with the production process. At the moment, the aerating device starts to aerate the screen downwards, the screen is swelled, deposited and blocked materials disappear quickly under the dual actions of aeration and water flushing, and the water amount on the screen is also reduced quickly; stopping aeration, gradually increasing the amount of the blocked materials deposited on the screen along with the production process, and aerating again; the steps are repeated in such a circulating way, and the air inflation and anti-blocking holes of the grading fine screen are realized.
In the embodiment, the grading fine screen is a high-frequency electromagnetic screen used for wet coal separation, and the fine coal (coal slurry) is dewatered and dried.
Referring to the attached fig. 1, 2 and 3, an electromagnetic screen 14 is positioned in an electromagnetic screen body 16, an air charging device is arranged below the electromagnetic screen 14, the air charging device comprises a spray head 2, a blower 12 and a pipeline, and the spray head 2 is positioned below the screen and is connected with the blower 12 through the pipeline. The end part of the electromagnetic screen body 16 is supported by the bracket 13, and the electromagnetic screen body 16 and the electromagnetic screen 14 inside the electromagnetic screen body are obliquely arranged; the pipeline is a rubber hose 5 and is provided with an electromagnetic valve 10, the electromagnetic valve 10 is arranged on an electromagnetic valve fixing frame 11, and the electromagnetic valve fixing frame 11 is fixed on a bracket 13; the rubber hose 5 is connected with the electromagnetic valve 10 through a second bolt 8 and a pipe clamp 9; the rubber hose 5 is placed on the screen bottom 7 after entering the electromagnetic screen body 16; a short pipe 4 is fixed on the electromagnetic screen body 16, a rubber hose 5 is connected with the short pipe 4, the short pipe is vertical to the arrangement direction of the electromagnetic screen 14 (vertical to the material flow direction), a plurality of pipe hoops 3 are arranged on the short pipe 4, each pipe hoop 3 is connected with a spray head 2, and the spray heads are arranged in a row; be equipped with radome fairing 1 on shower nozzle 2, the radome fairing is tubaeform, and the opening is towards the electromagnetic screen cloth. The aerating device intermittently aerates the lower part of the electromagnetic screen 14 to enable the electromagnetic screen 14 to swell and fall back.
A plurality of striking belts 15 driven by electromagnetic excitation are arranged below the electromagnetic screen 14, and the spray head 2 of the air charging device is positioned behind the striking belts 15.
In the embodiment, the inclination angle of the electromagnetic screen is 20-40 degrees, the pressure of the air charging device is 0.2-0.8MP, and the air volume is 0-10 m3Min; the duration of aeration is 1-20 seconds, and the interval time is 5-30 seconds.
Referring to fig. 4, the high-frequency electromagnetic screen has four layers of screens and screen bodies, namely a screen body one 17, a screen body two 18, a screen body three 19 and a screen body four 20, wherein the four layers of screens and the screen bodies are rotatably arranged and mutually supported; an independent inflating device is arranged below each layer of screen, and each screen forms independent swelling and falling. The mesh of the expanded screen is enlarged, fine particles clamped in the mesh are discharged, the inflating device is positioned below the material flow, the fine particle materials separated from the mesh are blown, the fine particle materials are washed away along with water on the screen surface, and the problem of screen hole blockage is solved.
Claims (8)
1. The utility model provides a hierarchical fine screen cloth aerifys prevents stifled hole system which characterized in that: the automatic aerator comprises a screen body, a screen mesh and an aerating device, wherein the screen mesh is positioned in the screen body, the aerating device is arranged below the screen mesh, and the aerating device intermittently aerates the lower part of the screen mesh to enable the screen mesh to swell and fall back.
2. The air-inflated anti-clogging system for classifying fine screen mesh according to claim 1, wherein: the air charging device comprises a spray head (2), an air blower (12) and a pipeline, wherein the spray head (2) is positioned below the screen mesh and is connected with the air blower (12) through the pipeline.
3. The graded fine screen aeration anti-clogging system of claim 1 or 2, wherein: the screen body is an electromagnetic screen body (16), and the screen is an electromagnetic screen (14); more than one set of air charging device is arranged below each electromagnetic screen (14), and the number of the spray heads of each air charging device is more than one.
4. The air-inflated anti-clogging system for classifying fine screen mesh according to claim 2, wherein: be equipped with radome fairing (1) on shower nozzle (2), the radome fairing is tubaeform, and the opening is towards the electromagnetic screen cloth.
5. An air inflation anti-blocking method for a grading fine screen mesh is characterized by comprising the following steps:
arranging an aerating device below a screen of the grading fine screen, and intermittently aerating below the screen to enable the screen to swell and fall back; after the meshes of the screen are blocked, the air charging device charges air downwards to the screen, the screen is swelled after the air charging, the meshes of the screen are enlarged after the swelling, fine particle materials clamped in the meshes are discharged, and the meshes of the screen are recovered smoothly; stopping aerating, releasing and falling the screen mesh, and continuously grading the granular materials.
6. The method for preventing the air inflation of the classifying fine screen mesh from blocking the hole according to claim 5, wherein the method comprises the following steps: the air charging device charges air downwards the screen at intervals regularly to enable the screen to bulge and fall back regularly; according to the blocking rule of the screened materials, the intermittent time and the inflation time are set, so that the normal production is ensured.
7. The method for preventing the air inflation of the classifying fine screen mesh from blocking the hole according to claim 6, wherein the method comprises the following steps: and adjusting the intermittent time and the inflation time in real time according to the change of the field logistics.
8. The method for preventing the air inflation of the classifying fine screen mesh from blocking the hole according to claim 5, wherein the method comprises the following steps: the grading fine screen is a high-frequency electromagnetic screen and is used for wet coal dressing and dewatering and drying fine coal particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054468.4A CN111170609A (en) | 2020-01-17 | 2020-01-17 | Inflation anti-blocking system and method for grading fine screen mesh |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054468.4A CN111170609A (en) | 2020-01-17 | 2020-01-17 | Inflation anti-blocking system and method for grading fine screen mesh |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111170609A true CN111170609A (en) | 2020-05-19 |
Family
ID=70625345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010054468.4A Pending CN111170609A (en) | 2020-01-17 | 2020-01-17 | Inflation anti-blocking system and method for grading fine screen mesh |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111170609A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975883A (en) * | 2021-12-06 | 2022-01-28 | 苏州禾能生物科技有限公司 | Plant protein draws with grinding thick liquid filter equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998042455A1 (en) * | 1997-03-21 | 1998-10-01 | Roger White | Sorting waste materials |
| CN2618670Y (en) * | 2003-05-14 | 2004-06-02 | 杨大海 | Rotary sorting sieve machine |
| CN103272772A (en) * | 2013-03-21 | 2013-09-04 | 南京凯盛国际工程有限公司 | Novel screening anti-blocking device |
| CN206305027U (en) * | 2016-12-14 | 2017-07-07 | 唐山洁境能源科技开发有限公司 | Combination high frequency fine screen |
| CN207899731U (en) * | 2017-12-22 | 2018-09-25 | 新乡市恒富电子机械有限公司 | A kind of first screen(ing) machine of anticlogging cylinder |
| CN108905400A (en) * | 2018-08-03 | 2018-11-30 | 苏州德崧净化有限公司 | A kind of anti-condensation strainer |
| CN208853250U (en) * | 2018-08-03 | 2019-05-14 | 资阳嘉好饲料科技有限公司 | Antifouling type feed vibrating screen structure |
-
2020
- 2020-01-17 CN CN202010054468.4A patent/CN111170609A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998042455A1 (en) * | 1997-03-21 | 1998-10-01 | Roger White | Sorting waste materials |
| CN2618670Y (en) * | 2003-05-14 | 2004-06-02 | 杨大海 | Rotary sorting sieve machine |
| CN103272772A (en) * | 2013-03-21 | 2013-09-04 | 南京凯盛国际工程有限公司 | Novel screening anti-blocking device |
| CN206305027U (en) * | 2016-12-14 | 2017-07-07 | 唐山洁境能源科技开发有限公司 | Combination high frequency fine screen |
| CN207899731U (en) * | 2017-12-22 | 2018-09-25 | 新乡市恒富电子机械有限公司 | A kind of first screen(ing) machine of anticlogging cylinder |
| CN108905400A (en) * | 2018-08-03 | 2018-11-30 | 苏州德崧净化有限公司 | A kind of anti-condensation strainer |
| CN208853250U (en) * | 2018-08-03 | 2019-05-14 | 资阳嘉好饲料科技有限公司 | Antifouling type feed vibrating screen structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975883A (en) * | 2021-12-06 | 2022-01-28 | 苏州禾能生物科技有限公司 | Plant protein draws with grinding thick liquid filter equipment |
| CN113975883B (en) * | 2021-12-06 | 2023-03-21 | 苏州禾能生物科技有限公司 | Plant protein draws with grinding thick liquid filter equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1202285A (en) | Method and installation for concentrating heavy metals, precious metals or heavy minerals in sand or gravel | |
| CN208275561U (en) | Half tower type sand production line | |
| CN111170609A (en) | Inflation anti-blocking system and method for grading fine screen mesh | |
| CN112916181A (en) | Sand production process for dust suppression and flying sand prevention under strong wind condition | |
| CN206925000U (en) | A kind of cement electric pole cleans screening plant with stone | |
| CN113695048A (en) | Sandstone aggregate production system and production method thereof | |
| CN216441089U (en) | Integral casting type stepped sieve plate | |
| CN117065902B (en) | Multistage broken sand making machine | |
| CN107185804A (en) | One kind is wet sieving to use vibratory sieve | |
| CN109332332A (en) | A kind of sand washer that difference granularity quickly dispenses | |
| CN206868596U (en) | One kind is wet sieving to use vibratory sieve | |
| CN106140449B (en) | A kind of oscillatory type sand washer | |
| CN214417012U (en) | Sand-stone separating device for river channel dredging | |
| CN214917854U (en) | Laminated high-frequency vibration fine screen with water distribution pipeline system | |
| CN110064500B (en) | Method for sorting quartz sand | |
| CN2385800Y (en) | Possitive-pressure specific separator | |
| CN107694937B (en) | Dragon type ore in sand form sorting machine | |
| CN216568184U (en) | Desilting sieving mechanism is used to fruit vegetables | |
| CN110064501B (en) | Water injection type quartz sand sorting method | |
| CN110064502B (en) | Multi-stage quartz sand sorting method | |
| CN213825301U (en) | Washing unit is used in lime stone processing | |
| CN212707510U (en) | Sieving device used after cable material granulation and cooling | |
| CN110898963B (en) | Recycled concrete aggregate screening system | |
| CN216261306U (en) | Concrete expanding agent classified screening grinding device | |
| CN220346529U (en) | Screening machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200519 |
|
| RJ01 | Rejection of invention patent application after publication |