CN114307339B - Belt filter press for sand washing - Google Patents
Belt filter press for sand washing Download PDFInfo
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- CN114307339B CN114307339B CN202111664116.1A CN202111664116A CN114307339B CN 114307339 B CN114307339 B CN 114307339B CN 202111664116 A CN202111664116 A CN 202111664116A CN 114307339 B CN114307339 B CN 114307339B
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Abstract
The invention relates to the technical field of building material equipment, and discloses a belt filter press for sand washing, which comprises a filter belt, wherein a bracket is arranged above the filter belt, the front surface and the back surface of the top end of the filter belt are fixedly connected with guide rods, a material containing rod is fixedly connected between the two guide rods, material passing holes are formed in the bottom ends of the material containing rod and the guide rods at equal intervals, and sliding grooves are formed in the bottom ends of the material containing rod and the guide rods. Through the fixed plate that the both sides of spreading the silo are equipped with the intercommunication, when the material is promoted by material itself, the material can be promoted the inside of removing the spreading the silo, after the material reached the top position of spreading the silo, the material was shunted by the shape of flow distribution plate, the material after the reposition of redundant personnel removes to the fixed plate of intercommunication, make the material remove the both sides position of spreading the silo through the inside water conservancy diversion of fixed plate, make the material be in the state that flows all the time at the spreading atress side of spreading the silo, avoid the production of caking, make the filter belt top spreading more even.
Description
Technical Field
The invention relates to the technical field of building material equipment, in particular to a belt filter press for sand washing.
Background
The water quantity used for sand washing is large, the liquid after sand washing is required to be reused after being treated, the liquid after sand washing is fully mixed with flocculating agent with certain concentration in a static and dynamic mixer, tiny solid particles in the liquid are coagulated into flocculent blocks with larger volume, free water is separated, the flocculent blocks after flocculation are conveyed to a filter belt dehydrated in a concentration gravity area, the flocculent blocks and the water on the filter belt are evenly paved through a bracket and a trough in the gravity area, the free water is separated under the action of gravity to form sludge in a non-flowing state, then the flocculent blocks reach a wedge area, are clamped between an upper mesh belt and a lower mesh belt, gradually squeeze the flocculent blocks through small to large extrusion force in the wedge area, and finally form a filter cake to be discharged.
In the gravity dewatering area, the bracket and the trough pave the floccule, one side of the trough, which is stressed by the floccule, bulges a bag formed by the floccule, so that the topmost end of the floccule bag is always blocked by the trough and continuously dewatered and dried until the floccule bag reaches a certain size, and is pushed by the rear floccule, so that the whole floccule bag moves together on the filter belt in the conveying direction, so that the floccule pavement after reaching the wedge area is uneven, the filter belt bulges when being extruded, and the whole extrusion dewatering effect is affected; and because the material is solid-liquid mixed state, so the marginal line of filter belt top material is crooked, and then causes the material edge to have the lack of material, extrudees the dehydration inhomogeneous.
Disclosure of Invention
Aiming at the defects of the prior belt filter press in the use process, the invention provides the belt filter press for sand washing, which has the advantages of timely supplementing and averaging, and solves the technical problems in the prior art.
The invention provides the following technical scheme: the utility model provides a belt filter press for sand washing, includes the filter belt, the top of filter belt is equipped with the bracket, the top openly of filter belt and back fixedly connected with guide bar, two fixedly connected with hold the material pole between the guide bar, the bottom equidistance of holding material pole and guide bar leaves and is equipped with the material hole, the sliding tray has been seted up to the bottom of holding material pole and guide bar, and guide bar and hold the material pole and all have the shop floor through sliding tray sliding connection, the shop floor is close to one side fixedly connected with sliding block of bracket, the bottom fixedly connected with of guide bar and holding material pole is located the annular cushion of one side that the bracket was kept away from to the material hole, the middle part fixedly connected with dead lever of annular cushion, the bottom fixedly connected with flow distribution plate of dead lever, the top fixedly connected with stirring plate of dead lever, the bottom cavity of guide bar, and the inside sliding connection of bottom of guide bar has the guide plate that is located sliding block one side, the both sides fixedly connected with dead plate of shop floor, one side fixedly connected with spring that the bracket was kept away from to the shop floor.
Preferably, the guide rod is integrally positioned on a connecting line between the material containing rod and the bracket, and one end of the guide plate is pushed by the sliding plug block to slide at the bottom end of the guide rod, and the other end of the guide plate leaves the inside of the guide rod and is positioned under one side of the bracket close to the material containing rod.
Preferably, the shape of the material containing rod is in an arc shape, the opening of the material containing rod faces the direction of the bracket, and the material passing hole at the bottom end of the material containing rod is positioned at one side of the bottom end of the material containing rod, which is close to the bracket.
Preferably, the fixing rod and the stirring plate are integrally T-shaped, and the stirring plate is close to and does not contact with the adjacent stirring plate in the material containing rod.
Preferably, the shape of the splitter plate is an inverted isosceles triangle, and the vertex angle faces the middle part of the material spreading groove.
Preferably, the shape of the fixing plate is arc-shaped, one end of the fixing plate is communicated with the spreading groove, and the other end of the fixing plate faces downwards.
The invention has the following beneficial effects:
1. according to the invention, the two sides of the spreading groove are provided with the communicated fixed plates, when the material is pushed by the material, the material can be pushed to move into the spreading groove, after the material reaches the top end position of the spreading groove, the material is split by the shape of the splitter plate, the split material moves to the communicated fixed plates, so that the material is guided to move to the two sides of the spreading groove through the inner guide of the fixed plates, the material is always in a flowing state on the spreading stress side of the spreading groove, the generation of caking is avoided, and the spreading at the top end of the filter belt is more uniform.
2. According to the invention, the guide rods are connected to the two sides of the top end of the filter belt, so that the guide plates in the guide rods move according to the amount of materials at the bottom end of the material paving groove, and then when the materials are less, the material paving groove moves to drive the guide plates to move, so that one side of each guide plate is positioned right below the bracket to receive the materials, meanwhile, the material passing holes are communicated through the movement of the material paving groove, and further, after the guide plates guide the materials in the bracket to the inside of the material containing rod, the materials in the material containing rod can flow into the material paving groove through the material passing holes, and the materials lacking at the edge of the filter belt are timely supplemented, so that the uniformity of the material paving at the edge of the filter belt is improved.
3. According to the invention, through the arrangement of the splitter plates, the annular soft cushion connected with the splitter plates is soft, when the spreading of the top end of the filter belt is uniform, the splitter plates are positioned at the outer side of the spreading groove, so that when materials sliding from the top end of the filter belt to the inner part of the spreading groove reach the top end of the spreading groove, the materials are split by the splitter plates, and meanwhile, the splitter plates are pushed to extrude the two sides of the bottom end of the splitter plates, so that the splitter plates move and vibrate, the splitter plates drive the fixed rods to move and vibrate, and meanwhile, the fixed rods drive the stirring plates to move and vibrate, so that the materials in the material containing rod are stirred, and the uniformity between the solid and the liquid of the materials in the material containing rod is improved.
Drawings
FIG. 1 is a schematic illustration of a structure of the present invention in a cut-away side view;
FIG. 2 is a schematic top view of the structure of the guide rod and the structure of the material containing rod of the present invention;
FIG. 3 is an enlarged schematic view of the structure A in FIG. 1 according to the present invention;
FIG. 4 is a schematic diagram of a structure of a material spreading groove for blocking a material passing hole;
FIG. 5 is a schematic diagram of a structure of a material spreading groove with an opened material passing hole;
FIG. 6 is a schematic view of section B-B of FIG. 5 in accordance with the present invention.
In the figure: 1. a filter belt; 2. a bracket; 3. a guide rod; 4. a material containing rod; 5. a material passing hole; 6. a material spreading groove; 7. a sliding plug block; 8. an annular cushion; 9. a fixed rod; 10. a diverter plate; 11. a stirring plate; 12. a deflector; 13. a fixing plate; 14. and (3) a spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a belt filter press for sand washing comprises a filter belt 1, a bracket 2 is arranged above the filter belt 1, a guide rod 3 is fixedly connected to the front and the back of the top end of the filter belt 1, the shape of the part of the guide rod 3 connected with a material containing rod 4 is the same as that of the material containing rod 4, referring to fig. 2, the material containing rod 4 is fixedly connected between the two guide rods 3, the bottom ends of the material containing rod 4 and the guide rod 3 are equidistantly separated from a material passing hole 5, sliding grooves are formed in the bottom ends of the material containing rod 4 and the guide rod 3, the guide rod 3 and the material containing rod 4 are all connected with a material spreading groove 6 through the sliding grooves in a sliding manner, and the included angle between the straight line of the material spreading groove 6 and the straight line of the filter belt 1 is always an acute angle, so that when the material is conveyed at the top end of the filter belt 1, the material at the back pushes the front material, and the material can move into the material spreading groove 6 with reference to fig. 1 and 3, the side of the spreading groove 6 close to the bracket 2 is fixedly connected with the sliding plug block 7, when the sliding plug block 7 is positioned at the bottom end of the passing hole 5, the bottom end of the passing hole 5 is sealed, the bottom ends of the guide rod 3 and the material containing rod 4 are fixedly connected with the annular cushion 8 positioned at the side of the passing hole 5 far away from the bracket 2, the middle part of the annular cushion 8 is fixedly connected with the fixed rod 9, referring to figures 4 and 5, the bottom end of the fixed rod 9 is fixedly connected with the splitter plate 10, the annular cushion 8 is made of rubber soft material, the motion condition between the splitter plate 10 and the fixed rod 9 can be transferred through the annular cushion 8, so when the splitter plate 10 is pushed by flocculated agglomerate materials, the fixed rod 9 is driven to move through the splitter plate 10, the stirring plate 11 can move and stir the materials in the material containing rod 4, the materials in the material containing rod 4 are always uniform in solid-liquid, the top end of the fixed rod 9 is fixedly connected with the stirring plate 11, the bottom of guide bar 3 is hollow, and the inside sliding connection of bottom of guide bar 3 has guide plate 12 that is located slide block 7 one side, guide plate 12 one side and slide block 7's of guide bar 3 inside one side fixed connection, and laminating sealed slip between guide plate 12 and the guide bar 3, refer to fig. 6, the both sides fixedly connected with fixed plate 13 of spreading groove 6, and the inside of fixed plate 13 communicates with the inside of spreading groove 6, refer to fig. 1, spreading groove 6 is kept away from the one side fixedly connected with spring 14 of bracket 2, and the other end and the bottom outside fixed connection of flourishing material pole 4 of spring 14.
Referring to fig. 1, the guide rod 3 is integrally located on a connection line between the material containing rod 4 and the bracket 2, when one end of the guide plate 12 is pushed by the sliding block 7 to slide at the bottom end of the guide rod 3, the other end of the guide plate 12 is separated from the inner part of the guide rod 3 and is located right below one side of the bracket 2 close to the material containing rod 4, when the material at the bottom end of the guide rod 3, which is the most edge of the filter belt 1, is less, the bottom end of the material spreading groove 6 is reduced by the pushing force of the material, the material spreading groove 6 moves towards the direction of the bracket 2, the material spreading groove 6 drives the sliding block 7 to push the guide plate 12 to move to extend out of the other side of the guide rod 3, one side of the guide plate 12 extending out of the guide rod 3 reaches the right below the bracket 2, the material in the bracket 2 flows out from the side to reach the top end of the guide plate 12, meanwhile, the moving sliding block 7 of the material spreading groove 6 moves away from the bottom end of the material passing hole 5, so that the material passing hole 5 is opened, the material containing rod 4 and the material spreading groove 6 are communicated with each other, after the material in the bracket 2 is guided into the inner part of the material containing rod 4 by the guide plate 12, the material passing through the inner part of the filter belt 5, the material passing through the filter belt 1 is made to flow through the inner part of the material passing hole 6, and the filter belt 1 is sufficient, and the material is absent.
Wherein, the shape of flourishing material pole 4 is the circular arc, and the opening part of flourishing material pole 4 is towards the direction of bracket 2, and the passing hole 5 of flourishing material pole 4 bottom is located the one side that flourishing material pole 4 bottom is close to bracket 2, and the shape setting of flourishing material pole 4 makes the inside of flourishing material pole 4 can hold partial material to when the top part of filter belt 1 lacks the material, can remove through the spread groove 6 of corresponding position and carry out timely replenishment, and the opening setting of flourishing material pole 4, be convenient for observe and wash the inside material of flourishing material pole 4.
Referring to fig. 2 and 4, the fixing rod 9 and the stirring plate 11 are integrally in a T shape, the stirring plate 11 is close to the inside of the material containing rod 4 and is not in contact with the adjacent stirring plate 11, the stirring plate 11 is arranged in the material containing rod 4 to maximize the stirring range, and the plane of the stirring plate 11 can be changed into other shapes, so that the stirring effect is improved.
Referring to fig. 6, the shape of the diverter plate 10 is an inverted isosceles triangle, and the vertex angle is towards the middle of the material spreading groove 6, because the annular cushion 8 connected with the top end of the diverter plate 10 is soft, when the material spreading at the top end of the filter belt 1 is uniform, the material spreading groove 6 drives the sliding block 7 to close the bottom end of the material passing hole 5, the diverter plate 10 is located at the outer side of the interior of the material spreading groove 6, which is close to the bracket 2, and the straight line where the diverter plate 10 is located is parallel to the straight line where the material spreading groove 6 is located, so that the material sliding from the top end of the filter belt 1 to the interior of the material spreading groove 6 is shunted by the shape of the diverter plate 10 when reaching the top end of the material spreading groove 6, so that the material can flow better from the interior of the material spreading groove 6, and flows out through the interior of the fixed plate 13, when the material spreading at the edge of the filter belt 1 is uneven, the material spreading groove 6 drives the bottom end of the material passing hole 5, the diverter plate 10 is located at the inner side of the material spreading groove 6, which is far away from the guide plate 12, and one side of the diverter plate 10 can be on the inner side of the material spreading groove 6, so that the diverter plate 10 is opposite to the material spreading groove 6, when the material flowing from the top of the material spreading groove 6 is stable, the material flowing in the material flowing process, and the material flowing in the material flowing well, and the material flowing well 10 can not have the influence.
Wherein, the shape of fixed plate 13 is the arc, and the one end and the shop material groove 6 intercommunication of fixed plate 13, the other end orientation below of fixed plate 13, through the arc setting of fixed plate 13, make the inside material of one side that is reached shop material groove 6 by the material promotion can flow out the inside of shop material groove 6 through fixed plate 13, make the material be in the state of flowing all the time in the inside of shop material groove 6, and because the arc shape of fixed plate 13, the material is continuous flowing through self gravity in the inside of fixed plate 13, thereby avoid shop material inside the shop material groove 6 short time pile up the agglomeration, make filter belt 1 top shop material more even.
The application method (working principle) of the invention is as follows:
when the gravity area dehydration is carried out, materials flow down through the side surface of the bracket 2, the materials are conveyed in the direction away from the bracket 2 at the top end of the filter belt 1, the materials are average in the middle under the action of the scraping plate, and the materials at the two sides of the edge of the filter belt 1 are uneven.
The spreading groove 6 below the guide rod 3 at the most side of the filter belt 1 with less materials is reduced in acting force of pushing the spreading groove 6 by the materials, the spreading groove 6 moves away from the material containing rod 4 relatively to the material containing rod 4, meanwhile, the sliding block 7 is away from the bottom end of the material passing hole 5, the material passing hole 5 is opened and communicated with the inside of the spreading groove 6, one end of the spreading groove 6 is enabled to push the guide plate 12 to move, the other end of the guide plate 12 protrudes out of the other end of the guide rod 3, the other end of the guide plate 12 is enabled to be located under the bracket 2, materials flowing out of the bracket 2 flow to the upper side of the guide plate 12 continuously flow to the top end of the guide rod 3 and flow to the inside of the material containing rod 4 along the guide rod 3, and materials flowing to the inside of the material containing rod 4 enter the inside of the spreading groove 6 through the material passing hole 5 and flow to the top end of the filter belt 1 through the guide groove 6, and supplement of the materials is carried out.
The spreading groove 6 of the flourishing material pole 4 below that the material is few, the effort of material promotion spreading groove 6 reduces, spreading groove 6 rotates anticlockwise to anticlockwise direction relative flourishing material pole 4, simultaneously, the bottom of crossing material hole 5 is kept away from to the sliding block 7, make the material hole 5 open and with spreading groove 6's inside intercommunication, when the inside of flourishing material pole 4 has the material, the inside material of flourishing material pole 4 gets into the inside of spreading groove 6 through material hole 5 to slide the top of filter belt 1 through spreading groove 6, carry out the replenishment of material.
When the gravity area dehydration is normally used, the spreading groove 6 below the material containing rod 4 is pushed by standard amount of material at the bottom end of the spreading groove 6, the spreading groove 6 is enabled to be compressed by the spring 14 to rotate clockwise relative to the material containing rod 4, so that the sliding plug 7 at one side of the spreading groove 6 reaches the bottom end of the material passing hole 5, the material passing hole 5 is closed, the material at the bottom end of the spreading groove 6 is pushed to move to the inside of the spreading groove 6 by continuously conveyed material and reaches the bottom end of the splitter plate 10, the material is pushed to two sides of the splitter plate 10 and is divided into two parts by the splitter plate 10, then leaves the inside of the spreading groove 6 through the two side fixing plates 13 of the splitter plate 10, two sides of the spreading groove 6 are reached, the material is averaged, meanwhile, the splitter plate 10 is pushed to move by the material, the splitter plate 10 drives the fixing rod 9 and the stirring plate 11 to move and vibrate simultaneously, and the stirring plate 11 stirs the material inside the material containing rod 4.
When the gravity area dehydration is normally used, the standard quantity material at the bottom end of the spreading groove 6 pushes the spreading groove 6, the spreading groove 6 is enabled to be compressed by the spring 14 to move towards the direction away from the bracket 2, so that the sliding block 7 at one side of the spreading groove 6 reaches the bottom end of the material passing hole 5, the material passing hole 5 is enabled to be closed, the guide plate 12 slides towards the inside of the guide rod 3 along with the sliding block 7 and is far away from the bottom end of the bracket 2, the material at the bottom end of the spreading groove 6 is pushed to move into the inside of the spreading groove 6 by the continuously conveyed material and reaches the bottom end of the distribution plate 10, the material pushes two sides of the distribution plate 10 and is divided into two parts by the distribution plate 10, then the material leaves the inside of the spreading groove 6 through the two side fixing plates 13 of the distribution plate 10, the material is enabled to be even, meanwhile, the distribution plate 10 is pushed to move by the material, and the distribution plate 10 drives the fixing rod 9 and the stirring plate 11 to move simultaneously, so that the stirring plate 11 stirs the material in the material containing rod 4.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a belt filter press for sand washing, includes filter belt (1), the top of filter belt (1) is equipped with bracket (2), its characterized in that: the utility model discloses a filter belt, which is characterized in that a guide rod (3) is fixedly connected with the front and the back of the top of the filter belt (1), two guide rods (3) are fixedly connected with a material containing rod (4), the bottom equidistance of the material containing rod (4) and the guide rods (3) is separated and provided with a material passing hole (5), sliding grooves are formed in the bottom ends of the material containing rod (4) and the guide rods (3), the guide rods (3) and the material containing rod (4) are fixedly connected with a material spreading groove (6) through the sliding grooves, one side of the material spreading groove (6) close to a bracket (2) is fixedly connected with a sliding plug block (7), the bottom ends of the guide rods (3) and the guide rods (4) are fixedly connected with an annular soft cushion (8) positioned on one side of the material passing hole (5) away from the bracket (2), a fixed rod (9) is fixedly connected with the middle part of the annular soft cushion (8), the bottom end of the fixed rod (9) is fixedly connected with a splitter plate (10), the top end of the fixed rod (9) is fixedly connected with a stirring plate (11), one side of the guide rods (3) is close to one side of the bracket (2), one side of the hollow soft cushion (12) is fixedly connected with a sliding plate (13), a spring (14) is fixedly connected to one side, far away from the bracket (2), of the spreading groove (6);
the fixed rod (9) and the stirring plate (11) are integrally T-shaped, and the stirring plate (11) is close to and does not contact with the adjacent stirring plate (11) in the material containing rod (4);
the shape of the splitter plate (10) is an inverted isosceles triangle, and the vertex angle faces the middle part of the material spreading groove (6).
2. A belt filter press for sand washing as claimed in claim 1, wherein: the guide rod (3) is integrally positioned on a connecting line between the material containing rod (4) and the bracket (2), and one end of the guide plate (12) is pushed by the sliding plug block (7) to slide at the bottom end of the guide rod (3), and the other end of the guide plate (12) leaves the inside of the guide rod (3) and is positioned under one side, close to the material containing rod (4), of the bracket (2).
3. A belt filter press for sand washing as claimed in claim 1, wherein: the shape of the material containing rod (4) is in an arc shape, the opening of the material containing rod (4) faces the direction of the bracket (2), and the material passing hole (5) at the bottom end of the material containing rod (4) is positioned at one side, close to the bracket (2), of the bottom end of the material containing rod (4).
4. A belt filter press for sand washing as claimed in claim 1, wherein: the shape of the fixing plate (13) is arc-shaped, one end of the fixing plate (13) is communicated with the spreading groove (6), and the other end of the fixing plate (13) faces downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111664116.1A CN114307339B (en) | 2021-12-31 | 2021-12-31 | Belt filter press for sand washing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111664116.1A CN114307339B (en) | 2021-12-31 | 2021-12-31 | Belt filter press for sand washing |
Publications (2)
| Publication Number | Publication Date |
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| CN114307339A CN114307339A (en) | 2022-04-12 |
| CN114307339B true CN114307339B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111664116.1A Active CN114307339B (en) | 2021-12-31 | 2021-12-31 | Belt filter press for sand washing |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204096454U (en) * | 2014-08-27 | 2015-01-14 | 天津天成通昊煤炭贸易有限公司 | Coal dust transmission adds material mixing plant |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8151997B2 (en) * | 2009-12-07 | 2012-04-10 | Flsmidth A/S | Horizontal belt vacuum filter with overhead fluid removal |
| CN205360767U (en) * | 2015-12-30 | 2016-07-06 | 黄敬超 | Concentrated pressure filter of split type belt |
| CN207313413U (en) * | 2017-09-22 | 2018-05-04 | 牛明军 | A kind of belt filter press with gear mud band |
| CN108271714A (en) * | 2018-03-26 | 2018-07-13 | 严涛 | A kind of uniform animal husbandry automatic feeder of feeding |
| CN112791783A (en) * | 2021-02-01 | 2021-05-14 | 天津市弘亚润滑粉制造有限公司 | A raw materials grinding device for production of wire drawing powder |
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2021
- 2021-12-31 CN CN202111664116.1A patent/CN114307339B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204096454U (en) * | 2014-08-27 | 2015-01-14 | 天津天成通昊煤炭贸易有限公司 | Coal dust transmission adds material mixing plant |
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Effective date of registration: 20230629 Address after: 524500 Xinweiling, Huangpo Town, Wuchuan City, Zhanjiang City, Guangdong Province (formerly Zhongshan Brick Factory) Applicant after: Wuchuan Yuanming silica sand Co.,Ltd. Address before: 154000 No. 184, group 1, Dongfeng Village, Ya'an Township, suburb of Jiamusi City, Heilongjiang Province Applicant before: Gao Hongxu |
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