CN203030364U - Machining system capable of adjusting fineness modulus of natural sand - Google Patents
Machining system capable of adjusting fineness modulus of natural sand Download PDFInfo
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- CN203030364U CN203030364U CN 201320027390 CN201320027390U CN203030364U CN 203030364 U CN203030364 U CN 203030364U CN 201320027390 CN201320027390 CN 201320027390 CN 201320027390 U CN201320027390 U CN 201320027390U CN 203030364 U CN203030364 U CN 203030364U
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Abstract
The utility model discloses a machining system capable of adjusting the fineness modulus of natural sand. The machining system comprises a receiver bin, wherein a bar-type feeding machine is arranged below the receiver bin, wherein a minus sieve of the bar-type feeding machine is connected with a semi-finished product storage yard through a first sealing-tape machine; a plus sieve of the bar-type feeding machine is connected with a jaw crusher; a discharge hole of the jaw crusher is connected with the semi-finished product storage yard through the first sealing-tape machine; a second sealing-tape machine is arranged at the lower part of the semi-finished product storage yard; a plurality of multi-layered circular vibration sieves are arranged below the second sealing-tape machine; a plurality of finished product storage yards are arranged at the lower part of the plurality of multi-layered circular vibration sieves; the plurality of finished product storage yards are respectively supplied with concrete aggregate of different particle side ranges; and the system is further provided with water supply facilities, a rod mill and wastewater treatment facilities. On premise that the output of the natural sand of natural grade is not changed, the fineness modulus of the natural sand is effectively controlled, the phenomenon that waste materials are caused as the output of the sand is increased is avoided, and both the quality of the sand is improved, and the operation cost of the whole system is lowered.
Description
Technical field
The utility model belongs to concrete natural aggregate processing technique field.
Background technology
Modulus of fineness is an important indicator weighing the quality of sand, directly has influence on concrete workability, intensity, impermeability and durability index.It is 2.4～2.8 that existing job specfication requires the modulus of fineness of sand.
Be subjected to the prior art conditionality, the modulus of fineness adjusting process of sand and method or complexity cause construction investment and operating cost to strengthen; Technology simply falls flat, and causes the quality of production of finished sand not meet the demands.
Summary of the invention
[0003] the technical problems to be solved in the utility model provides system of processing and the construction method of a kind of adjustable all day of right grain fineness number modulus; adopt this technology can either satisfy the quality requirement of aggregate; easy operating again; being conducive to reduce resource simultaneously drops into; reduce construction investment and be conducive to energy-saving and emission-reduction and environmental protection, especially the modulus of fineness of finished sand is able to flexible adjustment.
The technical solution adopted in the utility model:
A kind of adjustable all day right grain fineness number modulus system of processing, it comprises receiver bin, receiver bin is arranged with rod formula batcher, be connected with the semi-finished product stockyard by first sealing-tape machine under the sieve of rod formula batcher, be connected with jaw crusher on the sieve of rod formula batcher, the discharge gate of jaw crusher is connected with the semi-finished product stockyard by first sealing-tape machine; Bottom, described semi-finished product stockyard is provided with second sealing-tape machine, and the below of second sealing-tape machine is provided with many multilayer circular shale shakers, and many multilayer circular shale shaker bottoms are provided with a plurality of finished products stockyard, can obtain the aggregate of different-grain diameter scope in a plurality of finished products stockyard respectively; This system also is provided with water facilities, rod mill and waste water disposal facility, and water facilities is sprayed, the compass screen surface of many multilayer circular shale shakers is sprayed towards Xian and to carrying out water filling rod milling sand processed in the rod mill crusher chamber the storehouse face of the receiver bin of system respectively; The waste water unification that produces in the system converges to waste water disposal facility and handles, and the water cycle applications after the processing is in the system of processing industrial water.
The top of above-mentioned second sealing-tape machine, one end is provided with tramp iron separator.
Above-mentioned many three layers of circular shale shaker are 2 three layers of circular shale shakers, and 2 three layers of circular shale shaker upper-lower positions set gradually, and the ground floor of first three layers of circular shale shaker is connected with the first condiment storehouse by the 3rd sealing-tape machine; The second layer sieve of first three layers of circular shale shaker is gone up aggregate and is divided two-way, and the 3rd sealing-tape machine and first of leading up to is regulated feed bin and is connected, and another road is connected with the first finished product stockyard by the 5th sealing-tape machine; Aggregate is connected with the second finished product stockyard by the 6th sealing-tape machine on the 3rd layer of sieve of first three layers of circular shale shaker; Described first regulates and to be provided with the frequency conversion type electromagnetic feeder below the feed bin, the frequency conversion type electromagnetic feeder with in broken gyratory crusher be connected, in the discharge gate of broken gyratory crusher be connected with second sealing-tape machine.
Be connected with second three layers of circular shale shaker under the 3rd layer of sieve of above-mentioned first three layers of circular shale shaker, the ground floor sieve of second three layers of circular shale shaker is gone up aggregate and is connected with the 3rd finished product stockyard by the 7th sealing-tape machine; The second layer sieve of second three layers of circular shale shaker is gone up aggregate and is connected with the 4th finished product stockyard by the 8th sealing-tape machine; Regulating feed bin by the 9th sealing-tape machine and second on the 3rd layer of sieve of second three layers of circular shale shaker is connected, second three layers of circular shale shaker sieve has first spiral Xian sand machine, discharging opening at first spiral Xian sand machine is provided with first dewatering screen, is provided with the tenth sealing-tape machine and the 11 sealing-tape machine under first dewatering screen successively; Be provided with electronic arc-shaped door below the described second adjusting feed bin, electronic arc-shaped door is connected with rod mill by the 12 sealing-tape machine, the discharge gate of rod mill is connected with second spiral Xian sand machine, the discharge gate of second spiral Xian sand machine is connected with second dewatering screen, and the discharging opening of second dewatering screen is connected with the fifty percentth product stockyard by the 11 sealing-tape machine and the 13 sealing-tape machine.
Also be provided with the machine of strike-ofing in the said system, intrasystem factory effluent unification converges to the machine of strike-ofing and carries out the fine sand recovery, fine sand after the recovery is divided into two-way, the 4th sealing-tape machine of leading up to enters to be abandoned the stockpile field and stores up, and another road enters the 11 sealing-tape machine and carries out entering the 5th finished sand stockyard after the blending and store up.
The technique effect that the utility model is obtained:
1, system does not change under the preceding topic of output of natural sand natural grading, realizes controlling effectively the modulus of fineness of natural sand, and the output of having avoided increasing sand causes sand material surplus to cause abandoning material, both improved the quality of sand, reduced the operating cost of whole system again.
2, the coarse sand of selecting 3～5mm particle diameter has reduced rod mill operation rod iron loss and energy consumption effectively as rod milling mechanism sandy plain material.
3, the exploitation material source outside system is controlled, and realizes the collocation of thickness grating, has both improved the production efficiency of system, has guaranteed the effect that the modulus of fineness of sand can be adjusted flexibly again.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
Referring to Fig. 1, a kind of adjustable all day right grain fineness number modulus system of processing, it comprises receiver bin 1, receiver bin is arranged with rod formula batcher 2, be connected with semi-finished product stockyard 5 by first sealing-tape machine 4 under the sieve of rod formula batcher, be connected with jaw crusher 3 on the sieve of rod formula batcher, the discharge gate of jaw crusher 3 is connected with semi-finished product stockyard 5 by first sealing-tape machine 4; 5 bottoms, described semi-finished product stockyard are provided with second sealing-tape machine 8, the below of second sealing-tape machine 8 is provided with many multilayer circular shale shakers 9,16, many multilayer circular shale shaker bottoms are provided with a plurality of finished products stockyard 34,35,36,37,38, can obtain the aggregate of different-grain diameter scope in a plurality of finished products stockyard respectively; This system also is provided with water facilities 33, rod mill 23 and waste water disposal facility 32, and water facilities is sprayed, many multilayer circular shale shakers 9,16 compass screen surface are sprayed towards Xian and to carrying out water filling rod milling sand processed in rod mill 23 crusher chamber the storehouse face of the receiver bin 1 of system respectively; The waste water unification that produces in the system converges to waste water disposal facility 32 and handles, and the water cycle applications after the processing is in the system of processing industrial water.
The top of described second sealing-tape machine, 8 one ends is provided with tramp iron separator 7.
Described many three layers of circular shale shaker are that 2 three layers of circular shale shakers 9,16,2 three layers of circular shale shaker upper-lower positions set gradually, and the ground floor of first three layers of circular shale shaker 9 is connected with the first condiment storehouse 11 by the 3rd sealing-tape machine 10; The second layer sieve of first three layers of circular shale shaker 9 is gone up aggregate and is divided two-way, and the 3rd sealing-tape machine 10 and first of leading up to is regulated feed bin 11 and is connected, and another road is connected with the first finished product stockyard 34 by the 5th sealing-tape machine 14; Aggregate is connected with the second finished product stockyard 35 by the 6th sealing-tape machine 15 on the 3rd layer of sieve of first three layers of circular shale shaker 9; Described first regulates and to be provided with frequency conversion type electromagnetic feeder 12 below the feed bin 11, the frequency conversion type electromagnetic feeder with in broken gyratory crusher 13 be connected, in the discharge gate of broken gyratory crusher 13 be connected with second sealing-tape machine 8.
Be connected with second three layers of circular shale shaker 16 under the 3rd layer of sieve of first three layers of circular shale shaker 9, the ground floor sieve of second three layers of circular shale shaker 16 is gone up aggregate and is connected with the 3rd finished product stockyard 36 by the 7th sealing-tape machine 17; The second layer sieve of second three layers of circular shale shaker 16 is gone up aggregate and is connected with the 4th finished product stockyard 37 by the 8th sealing-tape machine 18; Regulating feed bin 20 by the 9th sealing-tape machine 19 and second on the 3rd layer of sieve of second three layers of circular shale shaker 16 is connected, second three layers of circular shale shaker, 16 sieve has first spiral Xian sand machine 26, be provided with under first dewatering screen, 27, the first dewatering screens at the discharging opening of first spiral Xian sand machine 26 and be provided with the tenth sealing-tape machine 28 and the 11 sealing-tape machine 29 successively; Be provided with electronic arc-shaped door 21 below the described second adjusting feed bin 20, electronic arc-shaped door is connected with rod mill 23 by the 12 sealing-tape machine 22, the discharge gate of rod mill 23 is connected with second spiral Xian sand machine 24, the discharge gate of second spiral Xian sand machine 24 is connected with second dewatering screen 25, and the discharging opening of second dewatering screen 25 is connected with the fifty percentth product stockyard 38 by the 11 sealing-tape machine 29 and the 13 sealing-tape machine 30.
Also be provided with the machine of strike-ofing 31 in this system, intrasystem factory effluent unification converges to the machine of strike-ofing 31 and carries out the fine sand recovery, fine sand after the recovery is divided into two-way, the 4th sealing-tape machine 39 of leading up to enters to be abandoned stockpile field 40 and stores up, and another road enters the 11 sealing-tape machine 29 and carries out entering the 5th finished sand stockyard 38 after the blending and store up.
Utilize the processing method of native system adjustment natural sand modulus of fineness as follows:
1), plan a plurality of mining areas in natural sand gravel stock ground, designs the exploitation ratio in each exploiting field according to the grating difference of each mining area, carry out Methodistic exploitation, to guarantee to enter the woollen grating even thickness of exploitation of system of processing;
2), the natural sand gravel material from excavation is unloaded to rod formula batcher 2 by the discharge gate that dump truck is transported to receiver bin 1, on the grizzly feeder sieve 〉=and the gravel material of 150mm is delivered to jaw crusher 3 fragmentations through rod formula batcher 2, and the gravel building stones of the gravel material after the fragmentation and grizzly feeder sieve time≤150mm converge to first sealing-tape machine 4 through discharge funnel and are transported to semi-finished product stockpile field 5 and store up;
3), have a plurality of discharge ports in semi-finished product stockpile field 5, a frequency conversion type electromagnetic feeder 6 is installed under each discharge port accordingly, by frequency conversion type electromagnetic feeder 6 the semi-finished product sand gravel material source of storing up on the semi-finished product stockpile field 5 is unloaded to second sealing-tape machine 8;
4), for the ironwares such as bucket tooth that prevent from mixing the air drill drill bit exist in the material source and excavator damage intrasystem in broken gyratory crusher 13, head at second sealing-tape machine 8 is equipped with tramp iron separator 7, mixes the drill bit exist in the material source and the ironwares such as bucket tooth of excavator to reject;
5), second sealing-tape machine 8 semi-finished product that will load are delivered to first three layers of circular shale shaker 9 and carry out the screening towards Xian, on the ground floor sieve＞the gravel building stones of 150mm by the 3rd sealing-tape machine 10 be delivered to first regulate feed bin 11 store up with in broken gyratory crusher 13, second sealing-tape machine 8 form the closed circuit fragmentation of carrying out;
6), the last 80～150mm aggregate of the second layer of first three layers of circular shale shaker 9 sieve divides two-way, the 3rd sealing-tape machine 10 of leading up to is delivered to first and regulates feed bin 11 and store up, and with in broken gyratory crusher 13,8 formation of second sealing-tape machine are closed circuit carries out fragmentation; It is that store up in the first finished product stockyard 34 of 80～150mm that another road is delivered to particle diameter by the 5th sealing-tape machine 14;
7), the 3rd of first three layers of circular shale shaker 9 the layer of oversize particle directly is that 40～80mm aggregate is delivered to the second finished sand stockyard 35 by the 6th sealing-tape machine 15 and stores up;
8), the ground floor oversize particle of second three layers of circular shale shaker 16 directly is that 20～40mm aggregate is delivered to the 3rd finished product stockyard 36 by the 7th sealing-tape machine 17 and stores up;
9), the second layer oversize particle of second three layers of circular shale shaker 16 directly is that 5～20mm aggregate is delivered to the 4th finished product stockyard 37 by the 8th sealing-tape machine 18 and stores up;
10), directly to be 3～5mm aggregate be delivered to second by the 9th sealing-tape machine 19 regulates feed bin 20 and store up for the 3rd of second three layers of circular shale shaker 16 the layer of oversize particle, second regulates feed bin 20 divides into electronic arc door 21, and regulating particle diameters in the feed bin 20 by electronic arc door 21 with second is that 3～5mm coarse sand is delivered to the 12 sealing-tape machine 22 and is delivered to rod mill 23 sand processed then; Sand material through rod mill 23 processing enters second spiral Xian sand machine 24, enter second dewatering screen 25 through the sand material behind second spiral Xian sand machine, 24 Xian Xuan, enter the finished sand stockyard after mixing by the 11 sealing-tape machine 29 and the 13 sealing-tape machine 30 through the sand material after 25 dehydrations of second dewatering screen and store up;
11), the 3rd of second three layers of circular shale shaker 16 the layer of undersize footpath≤3mm sand material enters first spiral Xian sand machine 26 by funnel, enter first dewatering screen 27 through the sand material behind first spiral Xian sand machine, 26 Xian Xuan, enter the finished sand stockyard after the sand material of making through the sand material after the dehydration of first dewatering screen 27 and rod mill 23 mixes by the tenth sealing-tape machine 28, the 11 sealing-tape machine 29 and the 13 sealing-tape machine 30 and store up.
Adopt above-mentioned step and adopt the modulus of fineness of following method sand to be able to effective adjustment:
A, consider through the three-deck vibrating screen aggregate and run off towards Xian and the spiral Xian sand machine sand material fine sand in water Xian process, thereby cause the modulus of fineness of sand bigger than normal, thereby in system, be provided with many machines of strike-ofing.In process of production, intrasystem factory effluent unification converges to and carries out the fine sand recovery in the machine of strike-ofing.Fine sand after the recovery is divided into two-way, and the sealing-tape machine 39 of leading up to enters to be abandoned the stockpile field and store up, and another road enters the 11 sealing-tape machine 29 and carries out entering the 5th finished sand stockyard after the blending and store up.Enter the size of the fine sand flow of two-way, can determine to enter the yield of fine sand in the finished product according to the test situation of finished sand modulus of fineness.
B, the convenient modulus of fineness of adjusting sand of consideration are selected three layers of screen cloth for use at second circular shale shaker 16 of main screening, and the screen cloth of one deck 3mm is set, and general≤5mm sand material is divided into 3～5mm and 0～3mm two-stage, and 3～5mm coarse sand is transported to the machine-processed sand of rod milling by sealing-tape machine; The modulus of fineness of rod milling mechanism sand can be realized flexible adjustment by dress rod iron amount, rod mill inlet amount and the confluent of adjusting rod mill.
C, for making things convenient for the modulus of fineness adjustment of sand, the 3rd layer of screen cloth of replaceable second circular shale shaker 16, can select the screen cloth of 2.5 mm, 2.8 mm, 3mm, 3.5 mm respectively for use according to the production requirement of the modulus of fineness of sand, can satisfy the production requirement of finished sand modulus of fineness.
The confluent size of d, employing conversion first spiral Xian sand machine 26 and second spiral Xian sand machine 24, and the size of the revolution speed of screw of the screw diameter by changing spiral Xian sand machine and spiral Xian sand machine, what of spill-out of fine sand in spiral Xian sand machine Xian sand process can be effectively controlled, thereby the size of the modulus of fineness of sand can be effectively adjusted.
E, employing said method can be adjusted at the modulus of fineness of finished sand between 2.4～2.8.
Claims (5)
- One kind adjustable all day right grain fineness number modulus system of processing, it is characterized in that: it comprises receiver bin (1), receiver bin is arranged with rod formula batcher (2), be connected with semi-finished product stockyard (5) by first sealing-tape machine (4) under the sieve of rod formula batcher, be connected with jaw crusher (3) on the sieve of rod formula batcher, the discharge gate of jaw crusher (3) is connected with semi-finished product stockyard (5) by first sealing-tape machine (4); Bottom, described semi-finished product stockyard (5) is provided with second sealing-tape machine (8), the below of second sealing-tape machine (8) is provided with many multilayer circular shale shakers (9,16), many multilayer circular shale shaker bottoms are provided with a plurality of finished products stockyard (34,35,36,37,38), can obtain the aggregate of different-grain diameter scope in a plurality of finished products stockyard respectively; This system also is provided with water facilities (33), rod mill (23) and waste water disposal facility (32), and water facilities is sprayed, the compass screen surface of many multilayer circular shale shakers (9,16) is sprayed towards Xian and to carrying out water filling rod milling sand processed in rod mill (23) crusher chamber the storehouse face of the receiver bin (1) of system respectively; The waste water unification that produces in the system converges to waste water disposal facility (32) and handles, and the water cycle applications after the processing is in the system of processing industrial water.
- 2. as claim 1Described adjustable all day right grain fineness number modulus system of processing, it is characterized in that: the top of described second sealing-tape machine (8) one ends is provided with tramp iron separator (7).
- Adjustable all day as claimed in claim 1 or 2 right grain fineness number modulus system of processing, it is characterized in that: described many three layers of circular shale shaker are 2 three layers of circular shale shakers (9,16), 2 three layers of circular shale shaker upper-lower positions set gradually, and the ground floor of first three layers circular shale shaker (9) is connected with the first condiment storehouse (11) by the 3rd sealing-tape machine (10); The second layer sieve of first three layers circular shale shaker (9) is gone up aggregate and is divided two-way, and the 3rd sealing-tape machine (10) and first of leading up to is regulated feed bin (11) and is connected, and another road is connected with the first finished product stockyard (34) by the 5th sealing-tape machine (14); Aggregate is connected with the second finished product stockyard (35) by the 6th sealing-tape machine (15) on the 3rd layer of sieve of first three layers circular shale shaker (9); Described first regulates and to be provided with frequency conversion type electromagnetic feeder (12) below the feed bin (11), the frequency conversion type electromagnetic feeder with in broken gyratory crusher (13) be connected, in the discharge gate of broken gyratory crusher (13) be connected with second sealing-tape machine (8).
- Adjustable all day as claimed in claim 3 right grain fineness number modulus system of processing, it is characterized in that: be connected with second three layers circular shale shaker (16) under the 3rd layer of sieve of first three layers circular shale shaker (9), the ground floor sieve of second three layers circular shale shaker (16) is gone up aggregate and is connected with the 3rd finished product stockyard (36) by the 7th sealing-tape machine (17); The second layer sieve of second three layers circular shale shaker (16) is gone up aggregate and is connected with the 4th finished product stockyard (37) by the 8th sealing-tape machine (18); Regulating feed bin (20) by the 9th sealing-tape machine (19) and second on the 3rd layer of sieve of second three layers circular shale shaker (16) is connected, second three layers circular shale shaker (16) sieve has first spiral Xian sand machine (26), discharging opening at first spiral Xian sand machine (26) is provided with first dewatering screen (27), is provided with the tenth sealing-tape machine (28) and the 11 sealing-tape machine (29) under first dewatering screen successively; Be provided with electronic arc-shaped door (21) below the described second adjusting feed bin (20), electronic arc-shaped door is connected with rod mill (23) by the 12 sealing-tape machine (22), the discharge gate of rod mill (23) is connected with second spiral Xian sand machine (24), the discharge gate of second spiral Xian sand machine (24) is connected with second dewatering screen (25), and the discharging opening of second dewatering screen (25) is connected with the fifty percentth product stockyard (38) by the 11 sealing-tape machine (29) and the 13 sealing-tape machine (30).
- As claim 1 or 3 described adjustable all day right grain fineness number modulus system of processing, it is characterized in that: also be provided with the machine of strike-ofing (31) in this system, intrasystem factory effluent unification converges to the machine of strike-ofing (31) and carries out the fine sand recovery, fine sand after the recovery is divided into two-way, the 4th sealing-tape machine (39) of leading up to enters to be abandoned stockpile field (40) and stores up, and another road enters the 11 sealing-tape machine (29) and carries out entering the 5th finished sand stockyard (38) after the blending and store up.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320027390 CN203030364U (en) | 2013-01-19 | 2013-01-19 | Machining system capable of adjusting fineness modulus of natural sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320027390 CN203030364U (en) | 2013-01-19 | 2013-01-19 | Machining system capable of adjusting fineness modulus of natural sand |
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| CN 201320027390 Expired - Fee Related CN203030364U (en) | 2013-01-19 | 2013-01-19 | Machining system capable of adjusting fineness modulus of natural sand |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085172A (en) * | 2013-01-19 | 2013-05-08 | 葛洲坝集团第五工程有限公司 | Processing system capable of adjusting fineness modulus of natural sand and processing method thereof |
| CN103949321A (en) * | 2014-05-09 | 2014-07-30 | 成都宏源铸造材料有限公司 | Nucleating agent granulating production line and production process and dust recovery method |
| CN105903540A (en) * | 2016-06-22 | 2016-08-31 | 中国葛洲坝集团第五工程有限公司 | Preparation system and method of rock-fill dam bedding material |
| CN105921245A (en) * | 2016-06-14 | 2016-09-07 | 中交第二航务工程局有限公司 | Concrete aggregate processing method and system |
| CN113019648A (en) * | 2021-03-02 | 2021-06-25 | 合肥水泥研究设计院有限公司 | High-efficient preparation system of abandonment concrete regeneration sand powder |
| CN115215072A (en) * | 2022-07-28 | 2022-10-21 | 四川公路桥梁建设集团有限公司 | Unmanned full-automatic feeding device |
| CN117380011A (en) * | 2023-10-20 | 2024-01-12 | 云南凯瑞特工程机械设备有限公司 | Machine-made sand production system |
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2013
- 2013-01-19 CN CN 201320027390 patent/CN203030364U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103085172A (en) * | 2013-01-19 | 2013-05-08 | 葛洲坝集团第五工程有限公司 | Processing system capable of adjusting fineness modulus of natural sand and processing method thereof |
| CN103949321A (en) * | 2014-05-09 | 2014-07-30 | 成都宏源铸造材料有限公司 | Nucleating agent granulating production line and production process and dust recovery method |
| CN103949321B (en) * | 2014-05-09 | 2016-06-29 | 成都宏源铸造材料有限公司 | Inovulant granulation production line and production technology thereof and dust recovery method |
| CN105921245A (en) * | 2016-06-14 | 2016-09-07 | 中交第二航务工程局有限公司 | Concrete aggregate processing method and system |
| CN105903540A (en) * | 2016-06-22 | 2016-08-31 | 中国葛洲坝集团第五工程有限公司 | Preparation system and method of rock-fill dam bedding material |
| CN113019648A (en) * | 2021-03-02 | 2021-06-25 | 合肥水泥研究设计院有限公司 | High-efficient preparation system of abandonment concrete regeneration sand powder |
| CN113019648B (en) * | 2021-03-02 | 2024-04-30 | 合肥水泥研究设计院有限公司 | High-efficient preparation system of abandonment concrete regeneration sand powder |
| CN115215072A (en) * | 2022-07-28 | 2022-10-21 | 四川公路桥梁建设集团有限公司 | Unmanned full-automatic feeding device |
| CN117380011A (en) * | 2023-10-20 | 2024-01-12 | 云南凯瑞特工程机械设备有限公司 | Machine-made sand production system |
| CN117380011B (en) * | 2023-10-20 | 2024-04-30 | 云南凯瑞特工程机械设备有限公司 | Machine-made sand production system |
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