CN105268636A - Method for separating impurities out of particle materials and separation device - Google Patents
Method for separating impurities out of particle materials and separation device Download PDFInfo
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- CN105268636A CN105268636A CN201510868917.8A CN201510868917A CN105268636A CN 105268636 A CN105268636 A CN 105268636A CN 201510868917 A CN201510868917 A CN 201510868917A CN 105268636 A CN105268636 A CN 105268636A
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- cone
- thinner
- powder collection
- collection storehouse
- sorting
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- 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
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
-
- 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
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- 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
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/04—Control arrangements
Abstract
Provided are a method for separating impurities out of particle materials and a separation device. Material mixtures to be separated are bundled to be columnar to be dumped towards the top of a cone continuously at initial speed, the material mixtures slide off along the conical face of the cone, the thickness of the material mixtures is reduced through the conical face with the diameter gradually increased in the sliding process, and the material mixtures dynamically wrap the conical face in a film shape till the material mixture slide off to the bottom of the cone and continue to fall off along the outer edge of the bottom of the cone in the shape of an annular curtain waterfall. The separation device adopting the method comprises a material thinning top and a particle collecting bin which are vertically arranged, the material thinning top is in the shape of the cone with an upward sharp end, an opening of a feeding port in the top of the particle collecting bin exactly faces the conical bottom of the material thinning top, the position, on the outer side of the feeding port, of the side wall of the particle collecting bin is obliquely turned downwards to form an unloading skirt plate, and a discharging port in the bottom of the particle collecting bin is provided with a negative-pressure exhaust assembly. The method and device are high in separation efficiency and good in effect. The device is simple in structure and good in reliability, and coarse materials can be separated continuously and efficiently.
Description
Technical field
The present invention relates to material sorting field, particularly relate to method and the device of impurity sorting in a kind of granule materials.
Background technology
Wood-based plate be with timber or other non-wood plants for raw material, be separated into after various unit material through certain machining, apply or do not apply sheet material or the pressing of adhesive and other additives gummed.
The wood-based plate of some type, in process, needs the material particles pulverized to carry out sorting, chooses volume and all suitable material particles of density, and they and volume is excessive, and density is excessive, or all excessive feed separation of bulk density comes.
Current sorting unit mostly is linear vibrating screen, spin vibration sieve etc., its general principle is the vibration by screen cloth, short grained material is sorted out, but such sorting unit cannot be close by volume, but the material particles that density difference is larger is separated, need to utilize centrifugal separator etc. to be separated material particles further, sub-elect volume and all suitable material particles of density further, not only sorting step is many, and the complicated structure of sorting unit, safeguard cumbersome, be unfavorable for the continuity of coarse fodder, high efficient sorting.
Summary of the invention
Technical problem to be solved by this invention is to provide the method for separating of impurity in a kind of granule materials and the sorting unit of application the method, the method and device can by disposable sorting actions, volume and all suitable material particles sorting from mixtures of materials of density are separated, and apparatus structure is simple, good reliability, is beneficial to the continuity of coarse fodder, high efficient sorting.
The present invention is achieved by the following technical solutions:
A method for separating for impurity in granule materials, is characterized in that:
To treat that the mixtures of materials of sorting is downward with an initial velocity, boundling becomes column to continue to dump towards the vertex of a cone position of cone,
Treat the conical surface landing of sorting material mixture along cone, in landing process, the thickness of mixtures of materials is made thinner by the conical surface that diameter increases gradually, in membranaceous dynamic coverage on the conical surface, until mixtures of materials landing is to boring bottom, edge cone end outer rim curtain waterfall shape continuation whereabouts ringwise
Curtain waterfall shape mixtures of materials in dropping process through point constituency of a negative pressure, by negative-pressure ward, the material particles that volume and density are all suitable moves towards the underlying space inside cone end outer rim, depart from mixtures of materials curtain waterfall and also exported this space by negative-pressure ward, volume and/or the excessive material of density continue fall in curtain waterfall shape and be collected.
This method first utilizes the conical surface discharging structure of cone mixtures of materials to be made thinner into curtain waterfall shape; curtain waterfall is in the process in point constituency being dropped through one section of negative pressure; the material particles that volume and density are all suitable can be subject to the impact of negative-pressure ward; the region higher towards negative pressure is moved; volume and/or the excessive material of density can not be subject to negative pressure impact; or the impact be subject to is less; overall still maintenance, continues in curtain waterfall shape the trend of whereabouts, thus is separated by the material particles that volume is all suitable with density and sorts out.
Making thinner of mixtures of materials is to ensure that the particle in mixtures of materials can be fully stressed, mixtures of materials is blocked up when point constituency by negative pressure, or stressed outer surface is too small, capital affects the sorting of material particles, cause the low of the efficiency of separation, the effect of sorting again after sorting repeatedly may being needed repeatedly just to reach make thinner.
The conical surface of cone is utilized to make thinner, not only thinning effect is good, is conducive to continuity sorting, and structure of making thinner is very simple, utilize the many transfer rollers that configure of height to make thinner compared with structure with existing, the advantage in device manufacturing cost and maintenance cost clearly.
Further, the height in described point of constituency, negative pressure value and wind speed can adjust respectively, by the height in adjustment point constituency, can control the particle volume that sub-elects and/or density; By the negative pressure value in adjustment point constituency, the particle volume that sub-elects and/or density also can be controlled; By adjustment point constituency wind speed, the change of mass flow can be adapted to.
Apply a sorting unit for the method for separating of impurity in above-mentioned granule materials, it is characterized in that:
The material that described device comprises upper and lower configuration is made thinner top and powder collection storehouse,
Material makes thinner top in most advanced and sophisticated taper upward,
The charging aperture opening at top, powder collection storehouse just to material make thinner top cone at the bottom of, and charging aperture opening be positioned at material make thinner top cone at the bottom of inside outer rim, the powder collection storehouse outer rim outside charging aperture with the downward-sloping discharging skirtboard of a circle outer rim,
Discharging opening bottom powder collection storehouse configures negative pressure ventilation assembly, makes the inner maintenance in region and the powder collection storehouse negative pressure state that material is made thinner between top/bottom part and charging aperture,
Material is made thinner between top with powder collection storehouse and is connected by jacking assembly, between the two can relative movement, thus increases or reduce the distance that material makes thinner between top/bottom part and charging aperture.
This device forms point favored area of negative pressure by negative pressure ventilation assembly, made thinner mixtures of materials that top makes thinner into curtain waterfall shape by the process of this point of favored area by material, the below that all suitable material particles of volume and density is made thinner inside top/bottom part outer rim towards material is moved, powder collection storehouse is entered by charging aperture, and continue by negative-pressure ward, exported by discharging opening, so that successional sorting, volume and/or the excessive material of density continue point constituency being dropped through negative pressure in curtain waterfall shape, be collected in outside, powder collection storehouse, thus reach the object of separation and sorting.
Further, described jacking assembly is manual adjustment means such as adjustment bolt etc., and adjustment bolt quantity is three, to make thinner top/bottom part circumference evenly vertical along material.Adjustment bolt one end is fixed on material and makes thinner on top or powder collection storehouse, the other end to be made thinner top through powder collection storehouse or material, end configuration nut, by the spiro rod length made thinner between top in rotary nut adjustment powder collection storehouse and material, namely adjustable material is made thinner the distance between top/bottom part and charging aperture, thus the height in adjustment point constituency.
Further again, described jacking assembly also can be the electric adjusting mechanisms such as feed screw nut's elevating mechanism, by motor-driven feed screw nut pair along material make thinner apical axis to be arranged on material make thinner top in, connecting rod one end is rotationally connected the nut of feed screw nut pair, and the other end is rotationally connected powder collection storehouse.Driven by motor screw mandrel rotates, and nut moves up and down along screw mandrel, and the distance impelling powder collection storehouse and material to make thinner between top by connecting rod changes, thus the height in adjustment point constituency.
Certainly, jacking assembly can also be the hydraulic regulation structure being similar to jack.
Further again, described discharging skirtboard can be the powder collection storehouse sidewall outwards tiltedly below directly turnover outside charging aperture, and form the fixing discharging skirtboard of a circle, the function of discharging skirtboard is to impel the short stay of material curtain waterfall in point constituency in dynamically falling, to make the abundant isolated at suction of negative pressure be held under the arm the suitable material particles be rolled in material curtain waterfall, then volume and/or the excessive material of density to continue along discharging skirtboard outwardly, landing downwards.
Further again, described discharging skirtboard also can be turn down the discharging skirtboard knot that angle can regulate as follows to show structure: described discharging skirtboard is made up of the multi-disc independence fan blades configured around top, powder collection storehouse outer rim, each fan blades inner edge is rotatably installed on powder collection storehouse, fan blades outer rim can overturn around its inner rim, thus change the angle of inclination of discharging skirtboard, the covering of the fan of each fan blades tilts, the both sides side adjacent with fan blades inner edge is high, side is low, the part covering of the fan of adjacent two fan blades is stacked staggered, and a fan blades height side is positioned at directly over adjacent fan blades downside.Thisly superpose by multi-disc fan blades the discharging skirtboard formed, as umbrella, can adjust angle up and down, the discharging skirtboard of adjustable angle is used for the granule materials that sorting is in critical condition, its effect is the time that the particle controlling to be in critical condition stops on skirtboard, implements further sorting.
By regulating the turnover angle of discharging skirtboard, the particle volume that sub-elects and/or density also can be controlled.
Further again, described material makes thinner top for hollow cone or solid-cone, and taper can be the pyramidal structure that circular cone, pyramid or elliptic cone etc. have similar function of making thinner.Be preferably hollow cone structure, not only cone deadweight is comparatively light, saves manufactured materials, and is convenient at other building blocks of function of cone internal placement.
Further again, described material makes thinner top for open circles taper, and charging aperture is the round mouth corresponding with it, and intake port is less than or equal to material and makes thinner the cone bottom diameter on top.Not only be beneficial to processing, and the effective of separation of making thinner.
Further again, described negative pressure ventilation assembly be vavuum pump or blower fan or other there is the similar device vacuumizing function.
Further again, Configuration Control Unit on described vavuum pump or blower fan.Control vavuum pump or fan speed by controller, adjust the vacuum magnitude in sorting district under realizing not shutdown situation and control separating effect.
Further again, described device configures air humidity/density sensor, and described air humidity/density sensor is by control circuit signal connection control device.And the air humidity/density of device working environment is recorded with this sensor, thus automatically control vavuum pump or fan speed, and then control the negative pressure in point constituency in real time, realize the high accuracy of separating effect, efficiently control.
Further again, described device configures mass flow monitor, mass flow monitor is by control circuit signal connection control device.The mass flow data of access to plant monitored in real time by mass flow monitor, and the change according to mass flow controls vavuum pump or fan speed in real time automatically, realize the high accuracy of separating effect, efficient control and wider accommodation further.
Beneficial effect of the present invention is:
1, the method and device can by disposable sorting actions, and volume and all suitable material particles sorting from mixtures of materials of density are separated, the efficiency of separation is high, good separation effect;
2, can the particle volume that sub-elects of regulable control and/or density in several ways, be not only applicable to the material particles sorting of industry of artificial boards, be applicable to the material particles sorting of other manufacturing industry, processing industry yet;
3, simple, the good reliability of apparatus structure, manufacture and maintenance cost not high, be beneficial to the continuity of coarse fodder, high efficient sorting.
4, can according to the change of sorting environment hollow air humidity degree/density, the change of mass flow controls wind speed and the negative pressure value in point constituency in real time, realizes the high accuracy of separating effect, efficient control and wider accommodation further.
Accompanying drawing explanation
Fig. 1 be a kind of preferred structure of this device face cut-away illustration
Fig. 2 be the another kind of preferred structure of this device face cut-away illustration
Fig. 3 is the top view of discharging skirtboard in Fig. 2
Fig. 4 is the syndeton front elevational schematic in the adjacent two panels fan blades of discharging skirtboard and powder collection storehouse in Fig. 3
Fig. 5 is the reverses direction schematic diagram of discharging skirtboard in Fig. 2
In Fig. 1 ~ 5: 1 to make thinner top for material, and 2 is powder collection storehouse, and 201 is charging aperture, and 202 is discharging skirtboard, and 203 be discharging opening, and 3 be feed screw nut's elevating mechanism, and 4 is adjust bolt.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
A method for separating for impurity in granule materials, is characterized in that:
To treat that the mixtures of materials of sorting is downward with an initial velocity, boundling becomes column to continue to dump towards the vertex of a cone position of cone, treat the conical surface landing of the mixtures of materials of sorting along cone, in landing process, the thickness of mixtures of materials is made thinner by the conical surface that diameter increases gradually, in membranaceous dynamic coverage on the conical surface, until mixtures of materials landing is to boring bottom, along cone end outer rim curtain waterfall shape continuation whereabouts ringwise, curtain waterfall shape mixtures of materials in dropping process through point constituency of a negative pressure, and the negative pressure value of boring the underlying space inside end outer rim is greater than the negative pressure value of curtain waterfall shape material whereabouts time channel through space, by negative-pressure ward, the material particles that volume and density are all suitable moves towards the underlying space inside cone end outer rim, depart from mixtures of materials curtain waterfall and exported this space by negative-pressure ward, volume and/or the excessive material of density continue fall in curtain waterfall shape and be collected.
By height, the negative pressure value in point constituency of adjustment negative pressure, the particle volume that sub-elects and/or density can be controlled; By adjustment point constituency wind speed, the change of mass flow can be adapted to.
This method first utilizes the conical surface discharging structure of cone mixtures of materials to be made thinner into curtain waterfall shape; curtain waterfall is in the process being dropped through one section of point of constituency; the material particles that volume and density are all suitable can be subject to the impact of negative-pressure ward; the region higher towards negative pressure is moved; volume and/or the excessive material of density can not be subject to negative pressure impact; or the impact be subject to is less, overall still maintenance, continues in curtain waterfall shape the trend of whereabouts, thus is separated by the material particles that volume is all suitable with density and sorts out.
Making thinner of mixtures of materials is to ensure that the particle in mixtures of materials can be fully stressed, mixtures of materials is blocked up when passing through to divide constituency, or stressed outer surface is too small, capital affects the sorting of material particles, cause the low of the efficiency of separation, the effect of sorting again after sorting repeatedly may being needed repeatedly just to reach make thinner.
In above-mentioned granule materials, the method for separating of impurity can practice with the sorting unit in such as Fig. 1 ~ 2, and the direction of arrow in figure is the direction of motion of material:
The material that device comprises upper and lower configuration is made thinner top 1 (being equivalent to the cone in method) and powder collection storehouse 2, material makes thinner top 1 in most advanced and sophisticated open circles taper upward, circular charging aperture 201 opening at top, powder collection storehouse 2 just to material make thinner top 1 cone at the bottom of, charging aperture 201 diameter is less than or equal to material and makes thinner the cone bottom diameter on top 1; Powder collection storehouse 2 outer rim outside charging aperture 201 encloses the downward-sloping discharging skirtboard 202 of outer rim with one; Discharging opening 203 bottom powder collection storehouse 2 configures negative pressure ventilation assembly, make thinner region bottom top 1 and between charging aperture 201 and inside, powder collection storehouse 2 of material is made to keep negative pressure state, material is made thinner between top 1 and powder collection storehouse 2 and is connected by jacking assembly, between the two can relative movement, thus increase or reduce the distance that material makes thinner bottom top 1 and between charging aperture 201.
Fig. 1 is the another kind of preferred embodiment of this device, its jacking assembly is feed screw nut's elevating mechanism 3, axially be arranged on material by motor-driven feed screw nut pair make thinner in top 1 along material top 1 of making thinner, connecting rod one end is rotationally connected the nut of feed screw nut pair, and the other end is rotationally connected powder collection storehouse 2; Powder collection storehouse 2 sidewall outside charging aperture 201 is tiltedly below turnover outwards, forms a circle discharging skirtboard 202.
Fig. 2 ~ 5 are the another kind of preferred embodiment of this device, and its jacking assembly is adjustment bolt 4, and adjustment bolt 4 quantity is three, to make thinner circumference evenly vertical bottom top 1 along material; Discharging skirtboard 202 is made up of the multi-disc independence fan blades configured around top, powder collection storehouse 2 outer rim, each fan blades inner edge is rotatably installed on powder collection storehouse 2, fan blades outer rim can overturn around its inner rim, thus change the angle of inclination of discharging skirtboard 202, the covering of the fan of each fan blades tilts, and the both sides side adjacent with fan blades inner edge is high, and side is low, the part covering of the fan of adjacent two fan blades is stacked staggered, and a fan blades height side is positioned at directly over adjacent fan blades downside.In Fig. 5, the direction of arrow is the reverses direction of discharging skirtboard 202.
Device forms point favored area of negative pressure by negative pressure ventilation assembly, the mixtures of materials of curtain waterfall shape is made thinner in the process by this sorting nip territory by material top 1 of making thinner, the below that all suitable material particles of volume and density is made thinner inside the bottom outer-edge of top 1 towards material is moved, powder collection storehouse 2 is entered by charging aperture 201, and continue by negative-pressure ward, exported by discharging opening 203, so that successional sorting, volume and/or the excessive material of density continue to be dropped through a point constituency in curtain waterfall shape, be collected in outside, powder collection storehouse 2, thus reach the object of separation and sorting.
Negative pressure ventilation assembly can for vavuum pump or blower fan or other there is the similar device vacuumizing function.Can also Configuration Control Unit on described vavuum pump or blower fan.Control vavuum pump or fan speed by controller, adjust the vacuum magnitude in sorting district under realizing not shutdown situation and control separating effect; Device can also configure air humidity/density sensor, and described air humidity/density sensor is by control circuit signal connection control device.And by air humidity/density that this sensor records, thus automatically control vavuum pump or fan speed, and then control the negative pressure in point constituency in real time, realize the high accuracy of separating effect, efficiently control; Described device can also configure mass flow monitor, and mass flow monitor is by control circuit signal connection control device.The mass flow data of access to plant monitored in real time by mass flow monitor, and the change according to mass flow controls vavuum pump or fan speed in real time automatically, realize the high accuracy of separating effect, efficient control and wider accommodation further.
Claims (13)
1. the method for separating of impurity in granule materials, is characterized in that:
To treat that the mixtures of materials of sorting is downward with an initial velocity, boundling becomes column to continue to dump towards the vertex of a cone position of cone,
Treat the conical surface landing of sorting material mixture along cone, in landing process, the thickness of mixtures of materials is made thinner by the conical surface that diameter increases gradually, in membranaceous dynamic coverage on the conical surface, until mixtures of materials landing is to boring bottom, edge cone end outer rim curtain waterfall shape continuation whereabouts ringwise
Curtain waterfall shape mixtures of materials in dropping process through point constituency of a negative pressure, by negative-pressure ward, the material particles that volume and density are all suitable moves towards the underlying space inside cone end outer rim, depart from mixtures of materials curtain waterfall, volume and/or the excessive material of density continue fall in curtain waterfall shape and be collected.
2. the method for separating of impurity in granule materials according to claim 1, it is characterized in that: the height in described point of constituency, negative pressure value and wind speed can adjust respectively.
3. application rights requires a sorting unit for the method for separating of impurity in granule materials described in 1, it is characterized in that:
The material that described device comprises upper and lower configuration is made thinner top (1) and powder collection storehouse (2),
Material makes thinner top (1) in most advanced and sophisticated taper upward,
Charging aperture (201) opening at powder collection storehouse (2) top just to material make thinner top (1) cone at the bottom of, and charging aperture (201) opening be positioned at material make thinner top (1) cone at the bottom of inside outer rim, powder collection storehouse (2) outer rim in charging aperture (201) outside encloses the downward-sloping discharging skirtboard (202) of outer rim with one
Discharging opening (203) the upper configuration negative pressure ventilation assembly of bottom, powder collection storehouse (2), material is made thinner region between bottom, top (1) and charging aperture (201) and powder collection storehouse (2) inner maintenance negative pressure state
Material is made thinner between top (1) and powder collection storehouse (2) and is connected by jacking assembly, between the two can relative movement, thus increase or reduce the distance that material makes thinner bottom top (1) and between charging aperture (201).
4. sorting unit according to claim 3, is characterized in that: described jacking assembly is adjustment bolt (4), and adjustment bolt (4) quantity is three, to make thinner the even vertical of bottom, top (1) circumference along material.
5. sorting unit according to claim 3, it is characterized in that: described jacking assembly is feed screw nut's elevating mechanism (3), axially be arranged on material by motor-driven feed screw nut pair make thinner in top (1) along material top (1) of making thinner, connecting rod one end is rotationally connected the nut of feed screw nut pair, and the other end is rotationally connected powder collection storehouse (2).
6. sorting unit according to claim 3, is characterized in that: described discharging skirtboard (202) is directly turned down by the outside tiltedly below of powder collection storehouse (2) sidewall in charging aperture (201) outside and formed.
7. sorting unit according to claim 3, is characterized in that:
Described discharging skirtboard (202) is made up of the multi-disc independence fan blades configured around powder collection storehouse (2) top outer rim,
Each fan blades inner edge is rotatably installed on powder collection storehouse (2), and fan blades outer rim can overturn around its inner rim, thus changes the angle of inclination of discharging skirtboard (202),
The covering of the fan of each fan blades tilts, and the both sides side adjacent with fan blades inner edge is high, and side is low,
The part covering of the fan of adjacent two fan blades is stacked staggered, and a fan blades height side is positioned at directly over adjacent fan blades downside.
8. sorting unit according to claim 3, is characterized in that: described material makes thinner top (1) for hollow cone or solid-cone, and taper is circular cone, pyramid or elliptic cone.
9. sorting unit according to claim 3, it is characterized in that: described material makes thinner top (1) for open circles taper, charging aperture (201) is the round mouth corresponding with it, and charging aperture (201) diameter is less than or equal to material and makes thinner the cone bottom diameter of top (1).
10. sorting unit according to claim 3, is characterized in that: described negative pressure ventilation assembly is vavuum pump or blower fan.
11. sorting units according to claim 10, is characterized in that: Configuration Control Unit on described vavuum pump or blower fan.
12. sorting units according to claim 11, is characterized in that: described device configures air humidity/density sensor, and described air humidity/density sensor is by control circuit signal connection control device.
13. sorting units according to claim 11, is characterized in that: described device configures mass flow monitor, and mass flow monitor is by control circuit signal connection control device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510868917.8A CN105268636B (en) | 2015-12-01 | 2015-12-01 | The method for separating and sorting unit of impurity in a kind of granule materials |
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| CN201510868917.8A CN105268636B (en) | 2015-12-01 | 2015-12-01 | The method for separating and sorting unit of impurity in a kind of granule materials |
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| CN105268636B CN105268636B (en) | 2018-11-06 |
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Cited By (2)
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| CN109604159A (en) * | 2019-01-24 | 2019-04-12 | 袁鼎山 | Corn mentions skin machine |
| CN114746191A (en) * | 2019-10-03 | 2022-07-12 | 凡留艾什技术股份有限公司 | Device for sorting powder particles |
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| CN105268636B (en) | 2018-11-06 |
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Denomination of invention: A sorting method and device for impurities in granular materials Effective date of registration: 20210928 Granted publication date: 20181106 Pledgee: Bank of China Limited Shanghai Qingpu sub branch Pledgor: GLOBE ENVIRONMENTAL SHANGHAI Co.,Ltd. Registration number: Y2021980010066 |
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