CN105502029A - Bulk material conveying, transfer and loading method and system - Google Patents
Bulk material conveying, transfer and loading method and system Download PDFInfo
- Publication number
- CN105502029A CN105502029A CN201510943001.4A CN201510943001A CN105502029A CN 105502029 A CN105502029 A CN 105502029A CN 201510943001 A CN201510943001 A CN 201510943001A CN 105502029 A CN105502029 A CN 105502029A
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- CN
- China
- Prior art keywords
- transhipment
- loose unpacked
- receiving hopper
- load system
- crushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/12—Sieving bulk materials during loading or unloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/14—Pulverising loaded or unloaded materials
Abstract
The invention provides a bulk material conveying, transfer and loading method and a system; and the system comprises a grid net, a receiving hopper, a feeding crusher and a downstream belt conveyor. Compared with the prior art, the material conveying system has less equipment used, the transfer and loading technological process of bulk materials from unloading to the belt conveyor is shortened, the conveying distance is shortened, the vertical height from the unloading place to the receiving place of the belt conveyor is reduced, the capital construction cost and the daily use cost are reduced, and the efficiency of the conveying system is improved. An insertion plate door in a feed port of the feeding crusher can control the conveying volumeof the downstream belt conveyor. A crushing tooth roller of the feeding crusher is positioned above a scraper conveyor for crushing materials with particle sizes larger than a gap between the crushing tooth roller and the scraper conveyor and not indirectly crushing materials with particle sizes smaller than the gap; and the selective crushing largely saves the crushing power consumption, saves the cost, improves the efficiency and accords with the targets of energy conservation and emission reduction.
Description
Technical field
The present invention relates to transmitting bulk material field (conveying as coal, coke), in particular to a kind of transhipment and Load System, method of transmitting bulk material, and adopt the bulk transport system of this system or method.
Background technology
Bulk transport system all has in iron and steel enterprise, petroleum refining enterprise, thermal power generation corporations, and the transhipment of loose unpacked material and loading run through the links of whole bulk transport system, the replacing of mode of movement each time or the process of material all can through once transporting and loading, and transporting and loading one of part the most key in beyond doubt bulk transport system first outside factory after supplied materials discharging, the selecting of this equipment component directly determines selecting of the part relevant devices such as follow-up conveying, storage, sieve be broken.
The supplied materials mode of current bulk transport system mainly contains train, automobile and grab bucket etc., and transhipment first after discharging and loading station are primarily of equipment compositions such as receiving hopper, feeder (as vibration, apron feeder etc.), belt conveyer, screening and fragmentations.
Please refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is a kind of transhipment of transmitting bulk material and the schematic diagram of Load System that prior art adopts unloading car dumper; Fig. 2 is a kind of transhipment of transmitting bulk material and the schematic diagram of Load System that prior art adopts automobile discharging; Fig. 3 is a kind of transhipment of transmitting bulk material and the schematic diagram of Load System that prior art adopts grab bucket discharging.
As shown in Figure 1, Figure 2 and Figure 3, the common feature of this several bulk transport system is, grid screen 1 ' is provided with above receiving hopper, vibra feeder 3 ' is provided with at the lower part outlet of receiving hopper 2 ', apron feeder 4 ' is provided with in the below of vibra feeder, being provided with double-roll crusher 5 ' or four-roller crusher in the below of apron feeder, is band conveyor 6 ' afterwards.
The material conveying method of above bulk transport system is: loose unpacked material is unloaded on receiving hopper by corresponding instrument of unloading, foreign material or bulk are separated by the screening through grid screen, what granularity was less than grid mesh falls among hopper, one end of apron feeder is fallen through vibra feeder material, apron feeder transports material to the other end, material falls into double-roll crusher or four-roller crusher, and the fragmentation through double-roll crusher or four-roller crusher makes the granularity of material meet the requirement of downstream band conveyor.
In such bulk transport system, the all devices of transhipment and loading station first after discharging is all be arranged in order by order from high in the end, and the height of each equipment adds that the safety gap sum between each equipment and equipment is the bottom-to-top-height of this transhipment and loading station.And be adopt train unloading car dumper or the mode such as automobile discharging, grab bucket discharging regardless of one discharging operation on it, all devices of transhipment and loading station first after discharging is all in below ground.Therefore, the transhipment first of such bulk transport system and loading station need when building to excavate corresponding basic tunnel, thus can arrange relevant device.
Obviously, the construction cost of such bulk transport system is higher.And material first falls from ground, arrive nadir through relevant device, be then transported to more than ground through equipment such as band conveyors.Obviously, in this delivery system transhipment and the height of loading station higher, construction cost is higher, and due to will by lower mass transport to sustained height, its energy consumption be also higher.
In view of this, need badly and the carrying method of the transhipment in existing bulk transport system and loading station and equipment are improved, reduce the vertical dimension of this part, to reduce its construction cost and the normal power consumption used, thus reduce construction cost and the use cost of enterprise, reach the requirement of energy-saving and emission-reduction.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of transhipment and stowage of transmitting bulk material, just effectively can reduce transhipment and the vertical dimension of loading station by the method, such that capital construction cost is low and use cost is low.Another technical matters that the present invention will solve is for providing a kind of transhipment and Load System of transmitting bulk material, and the structure of this system is simple, takies vertical dimension low.In addition, another technical matters that the present invention will solve is to provide a kind of bulk transport system adopting this transhipment and Load System or method.
For solving the problems of the technologies described above, the invention provides a kind of transhipment and stowage of loose unpacked material, comprising loose unpacked material that means of delivery unloads carries out bulk separation step through grid screen; Wherein,
Bulk in last process discharging is separated and the material meeting granularity requirements is then fallen into the receiving hopper of below by grid screen, coal transporting breaking machine by the material transfer in receiving hopper exit to band conveyor, and in the process of transhipment material, the material crossing coarsegrain is carried out fragmentation, make it to reach the condition meeting belt haulage.
This transhipment and stowage significantly shorten loose unpacked material from the transhipment be dumped between band conveyor and loading technique flow process compared with prior art scheme, shorten transportation range, reduce vertical dimension between discharging place to band conveyor splicing place, thus reduce capital construction cost and routine use cost, improve the efficiency of delivery system.
Present invention also offers a kind of transhipment and Load System of loose unpacked material, comprise receiving hopper and be arranged on the grid screen at its inlet point place, the coal transporting breaking machine of discharge outlet and be arranged on the band conveyor of described coal transporting breaking machine discharging opening, described grid screen comprises the crisscross steel plate of composition square opening, and be arranged on the inlet point of receiving hopper, the inlet point of described coal transporting breaking machine is arranged on receiving hopper outlet below, and discharging opening is positioned at above material feeding place of band conveyor in downstream.
Preferably, the size of the square opening of described crisscross steel plate composition is 200mm-1000mm, is preferably 500mm-800mm.
Preferably, described grid screen and receiving hopper are connected as one, and improve rigidity and the stability of receiving hopper and grid screen, thus improve the service life of grid screen and receiving hopper.
Preferably, described coal transporting breaking machine comprises: drag conveyer and the crushing toothed roller be arranged on above drag conveyer, described crushing toothed roller is positioned at the top of drag conveyer discharging section.And the material that granularity is greater than gap between crushing toothed roller to drag conveyer by described crushing toothed roller carries out fragmentation, material granularity being less than to this gap is then directly do not carry out fragmentation, broken power consumption has significantly been saved in this optionally fragmentation, save use cost, improve efficiency, meet the target of energy-saving and emission-reduction.
Preferably, described coal transporting breaking machine also comprises the frame for installing crushing toothed roller, described frame and drag conveyer are adhered to one, therefore, coal transporting breaking machine crushing toothed roller and drag conveyer when the broken material anti-force be subject to when material is broken just becomes the internal force of frame, improves the stressing conditions of bulk transport system when convey materials.
Preferably, transhipment and the Load System of described loose unpacked material also comprise: be arranged at the insertion plate door of feeding crushing machine inlet capable place for limiting scraper conveyer convey materials height, thus can control the transportation volume of downstream band conveyor.
Preferably, described insertion plate door can be arranged on described coal transporting breaking machine and also can be arranged in the outlet of receiving hopper.
Preferably, described insertion plate door two ends are provided with lifting eye, and described lifting eye can be set directly on plate, also can be the hangers be bonded on insertion plate door.
Preferably, described lifting eye can replace with derricking gear, and described derricking gear is hanger or hoisting screw, the hook with lifting eye.
Transhipment provided by the present invention and stowage and bulk transport system, comprise the band conveyor in grid screen, receiving hopper, coal transporting breaking machine and downstream.Compared to prior art, decrease material-transporting system device therefor, shorten loose unpacked material from the transhipment be dumped between band conveyor and loading technique flow process, shorten transportation range, reduce vertical dimension between discharging place to band conveyor splicing place, thus reduce capital construction cost and routine use cost, improve the efficiency of delivery system.Grid screen and receiving hopper are connected as one, and improve rigidity and the stability of receiving hopper and grid screen, thus improve the service life of grid screen and receiving hopper.The insertion plate door of feeding crushing machine inlet capable, can control the transportation volume of downstream band conveyor.The crushing toothed roller of coal transporting breaking machine is positioned at the top of drag conveyer, material granularity being greater than gap between crushing toothed roller to drag conveyer carries out fragmentation, material granularity being less than to this gap is then directly do not carry out fragmentation, this selective crushing has significantly saved broken power consumption, save use cost, improve efficiency, meet the target of energy-saving and emission-reduction.
Accompanying drawing explanation
Form a part of accompanying drawing of the present invention and be used to provide a further understanding of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is a kind of transhipment of transmitting bulk material and the schematic diagram of Load System that prior art adopts unloading car dumper.
Fig. 2 is a kind of transhipment of transmitting bulk material and the schematic diagram of Load System that prior art adopts automobile discharging.
Fig. 3 is a kind of transhipment of transmitting bulk material and the schematic diagram of Load System that prior art adopts grab bucket discharging.
Fig. 4 shows the transhipment of the loose unpacked material of one embodiment of the present of invention and the diagram of circuit of stowage.
Fig. 5 shows the transhipment of the loose unpacked material of one embodiment of the present of invention and the structural principle schematic diagram of Load System.
Fig. 6 is the structural principle schematic diagram of the coal transporting breaking machine of the bulk transport system of the embodiment of shown in Fig. 5.
Fig. 7 is the structural representation of the insertion plate door of the bulk transport system of the embodiment of shown in Fig. 5.
The local structure schematic diagram that Fig. 8 is the insertion plate door of the bulk transport system of another embodiment shown in Fig. 5.
Detailed description of the invention
Core of the present invention is for providing a kind of transhipment and stowage of loose unpacked material, and the method capital construction cost is low, and use cost is low.In addition, the present invention also provides a kind of transhipment and Load System of loose unpacked material, comprise the band conveyor in grid screen, receiving hopper, coal transporting breaking machine and downstream, this system has the technological process shorter compared with prior art scheme, less equipment and infrastructure investment, routine use cost are lower, efficiency is higher, meets the target of energy-saving and emission-reduction.
In order to make those skilled in the art better understand technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 4, Fig. 4 shows the transhipment of the loose unpacked material of one embodiment of the present of invention and the diagram of circuit of stowage.
In one embodiment, as shown in Figure 4, the transhipment of loose unpacked material provided by the present invention and stowage, this transhipment and Load System comprise be connected successively grid screen, receiving hopper, coal transporting breaking machine and below thereof band conveyor, transhipment and the stowage of described loose unpacked material comprise:
Step 101, after material unloading, granularity is less than being fallen by grid mesh of grid mesh; The coarsegrain material being greater than grid mesh then remains on grid screen, passes through grid screen by accessory appliancess such as artificial or coal pushers by after the process of coarsegrain material.
In technique scheme, by increasing vibrator on grid screen, material can also be accelerated by grid mesh, and can make to remain in coarsegrain material on grid screen after being shattered by grid mesh by vibration.
Step 102, the material collection that receiving hopper will be fallen by grid screen.
Step 103, the material in receiving hopper exit is drawn out by coal transporting breaking machine, then coal transporting breaking machine discharge outlet is transported to, and in the process of conveying, the material crossing coarsegrain is carried out fragmentation, the granularity requirements needed for belt haulage can be met, thus realize the safe loading of coal transporting breaking machine to band conveyor.
In this technical scheme, loose unpacked material after unloading, the technological process of carrying out carrying to the band conveyor in downstream by operations such as transhipment, fragmentation, loadings is significantly shortened compared with the prior art scheme described in background technology, the value volume and range of product of device therefor all significantly reduces, save equipment investment and capital expenditure, improve efficiency.
Please refer to Fig. 5 and Fig. 6, Fig. 5 shows the transhipment of the loose unpacked material of one embodiment of the present of invention and the structural principle schematic diagram of Load System; Fig. 6 is the structural principle schematic diagram of the coal transporting breaking machine of the bulk transport system of the embodiment of shown in Fig. 5.
As shown in Figure 5, the transhipment of loose unpacked material according to an embodiment of the invention and Load System, comprise grid screen 1, receiving hopper 2, the band conveyor 4 in coal transporting breaking machine 3 and downstream, described grid screen 1 is multiple square grid mesh compositions that the crisscross connection of steel plate strip is formed, and be arranged on the inlet point of receiving hopper 2, the inlet point of described coal transporting breaking machine 3 is arranged on receiving hopper 2 and exports below, and the discharging opening of coal transporting breaking machine 3 is positioned at above material feeding place of band conveyor 4 in downstream, the shape of described receiving hopper 2 is square or circular funnel-form, suitable for readingly be greater than end opening.
In this technical scheme, the size of the grid mesh of described grid screen 1 is 200mm-1000mm, is preferably 500mm-800mm.And grid screen 1 is connected as one by the mode of welding with receiving hopper 2, which enhance rigidity and the stability of receiving hopper 1 and grid screen 2, thus improve the service life of grid screen 1 and receiving hopper 2.
In technique scheme, as shown in Figure 6, described coal transporting breaking machine 3 comprises: drag conveyer 31 and the crushing toothed roller 32 be arranged on above drag conveyer 31, described crushing toothed roller 32 is positioned at the top of drag conveyer 31 discharging section.And the material that granularity is greater than gap between crushing toothed roller 32 to drag conveyer 31 by described crushing toothed roller 32 carries out fragmentation, material granularity being less than to this gap is then directly do not carry out fragmentation, broken power consumption has significantly been saved in this optionally fragmentation, save use cost, improve efficiency, meet the target of energy-saving and emission-reduction.
In technique scheme, described coal transporting breaking machine 3 also comprises the frame 33 for installing crushing toothed roller 32, described frame 33 and drag conveyer 31 are by weld or bolted mode is adhered to integrally, therefore, coal transporting breaking machine 3 crushing toothed roller 32 and drag conveyer 31 anti-force be subject to when material is broken when broken material just becomes the internal force of frame 33, improves the stressing conditions of bulk transport system when convey materials.
In technique scheme, transhipment and the Load System of described loose unpacked material also comprise: be arranged at the insertion plate door 5 of coal transporting breaking machine 3 inlet point place for limiting scraper conveyer 31 convey materials height.The distance between itself and drag conveyer 31 is changed by movable flashboard door 5, reach the object of the height of materials that adjustment drag conveyer 31 is carried, thus the transportation volume of downstream band conveyor 4 can be controlled, to ensure that the amount that coal transporting breaking machine 3 flows to the material of band conveyor 4 is no more than its transport capacity, guarantee the normal operation of system.
In this technical scheme, described insertion plate door 5 both can be arranged on described coal transporting breaking machine 3 and also can be arranged in the outlet of receiving hopper 2, was arranged on the exit of receiving hopper 2, was reached the object controlling downstream operational throughput by the adjustment of the load of receiving hopper 2.
Please refer to Fig. 7 and Fig. 8, Fig. 7 is the structural representation of the insertion plate door of the bulk transport system of the embodiment of shown in Fig. 5; The local structure schematic diagram that Fig. 8 is the insertion plate door of the bulk transport system of another embodiment shown in Fig. 5;
As shown in Figure 7, according to the insertion plate door 5 of bulk transport system provided by the invention, the two ends of described insertion plate door are respectively equipped with lifting eye 51, can be used for insertion plate door 5 to sling, thus the distance that can adjust between itself and drag conveyer 31, reach the object controlling operational throughput.
It should be noted that, in technique scheme, the pattern of the present invention to lifting eye 51 does not limit, and lifting eye 51 can be circular port, square opening or other profile holes.Further, this lifting eye 51 can replace with the derricking gear possessing identical function, and as shown in Figure 8, described derricking gear is a hanger 52 with similar lifting eye 51, and this hanger is arranged on the two ends of insertion plate door 5 by welding or other bonding way.Further, hanger 52 described in this also can replace with hoisting screw or hook.
In the whole description of specification sheets, " comprising " and modification thereof not intended to be get rid of other etcetera or component or numeral.
Above to crushing teeth assembly provided by the present invention and comprise the crushing toothed roller of this crushing teeth assembly, coal transporting breaking machine is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. the transhipment of loose unpacked material and a stowage, comprises loose unpacked material that means of delivery unloads carries out bulk separation step through grid screen, it is characterized in that,
Bulk in last process discharging is separated and the material meeting granularity requirements is then fallen into the receiving hopper of below by grid screen, coal transporting breaking machine by the material transfer in receiving hopper exit to band conveyor, and in the process of transhipment material, the material crossing coarsegrain is carried out fragmentation, make it to reach the condition meeting belt haulage.
2. the transhipment of a loose unpacked material and Load System, comprise receiving hopper and be arranged on the grid screen at its inlet point place, the coal transporting breaking machine of discharge outlet and be arranged on the band conveyor of described coal transporting breaking machine discharging opening, it is characterized in that, described grid screen comprises the crisscross steel plate of composition square opening, and be arranged on the inlet point of receiving hopper, the inlet point of described coal transporting breaking machine is arranged on receiving hopper outlet below, and discharging opening is positioned at above material feeding place of band conveyor in downstream.
3. the transhipment of loose unpacked material according to claim 2 and Load System, is characterized in that, the size of the square opening of described crisscross steel plate composition is 200mm-1000mm, is preferably 500mm-800mm.
4. the transhipment of loose unpacked material according to claim 2 and Load System, it is characterized in that, described grid screen and receiving hopper are connected as one.
5. the transhipment of loose unpacked material according to claim 2 and Load System, it is characterized in that, described coal transporting breaking machine comprises: drag conveyer and the crushing toothed roller be arranged on above drag conveyer, described crushing toothed roller is positioned at the top of drag conveyer discharging section, and the material that granularity is greater than gap between crushing toothed roller to drag conveyer by described crushing toothed roller carries out fragmentation, material granularity being less than to this gap is then directly do not carry out fragmentation.
6. the transhipment of loose unpacked material according to claim 2 and Load System, it is characterized in that, described coal transporting breaking machine also comprises the frame for installing crushing toothed roller, and described frame and drag conveyer are adhered to one.
7. the transhipment of the loose unpacked material according to any one of claim 2 to 6 and Load System, it is characterized in that, transhipment and the Load System of described loose unpacked material also comprise: be arranged at the insertion plate door of feeding crushing machine inlet capable place for limiting scraper conveyer convey materials height, thus can control the transportation volume of downstream band conveyor.
8. the transhipment of loose unpacked material according to claim 7 and Load System, it is characterized in that, described insertion plate door is arranged on described coal transporting breaking machine or is arranged in the outlet of described receiving hopper.
9. the transhipment of loose unpacked material according to claim 7 and Load System, it is characterized in that, described insertion plate door two ends are provided with lifting eye, and described lifting eye can be set directly on plate or be arranged on the hanger that is bonded on insertion plate door.
10. the transhipment of loose unpacked material according to claim 9 and Load System, it is characterized in that, described lifting eye can replace with derricking gear, and described derricking gear is hanger or hoisting screw, the hook with lifting eye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943001.4A CN105502029A (en) | 2015-12-16 | 2015-12-16 | Bulk material conveying, transfer and loading method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943001.4A CN105502029A (en) | 2015-12-16 | 2015-12-16 | Bulk material conveying, transfer and loading method and system |
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| Publication Number | Publication Date |
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| CN105502029A true CN105502029A (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510943001.4A Pending CN105502029A (en) | 2015-12-16 | 2015-12-16 | Bulk material conveying, transfer and loading method and system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106628969A (en) * | 2016-12-30 | 2017-05-10 | 莱歇研磨机械制造(上海)有限公司 | Mill base for roller mill belt material conveying system |
| CN108820940A (en) * | 2018-08-13 | 2018-11-16 | 河南省振源科技有限公司 | Building formula intelligent environment protection crushing and screening loading system |
| CN108889382A (en) * | 2018-07-18 | 2018-11-27 | 聊城信源集团有限公司 | The broken reutilization system and method for electrolytic cell fishing slag charge |
| CN110280348A (en) * | 2019-07-26 | 2019-09-27 | 陈江涛 | A kind of broken transfer device of town road solid waste |
| CN112158609A (en) * | 2020-09-23 | 2021-01-01 | 天地科技股份有限公司 | Intelligent coal storage, transportation and loading system and coordination control method thereof |
| CN114516513A (en) * | 2022-03-20 | 2022-05-20 | 山西太钢工程技术有限公司 | Method for recycling residual coal powder in skin of rollover locomotive |
| CN108889382B (en) * | 2018-07-18 | 2024-04-12 | 聊城信源集团有限公司 | Broken recycling system and method for slag scooping material of electrolytic tank |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106628969A (en) * | 2016-12-30 | 2017-05-10 | 莱歇研磨机械制造(上海)有限公司 | Mill base for roller mill belt material conveying system |
| CN106628969B (en) * | 2016-12-30 | 2023-10-20 | 莱歇研磨机械制造(上海)有限公司 | Mill base of roller mill belt material conveying system |
| CN108889382A (en) * | 2018-07-18 | 2018-11-27 | 聊城信源集团有限公司 | The broken reutilization system and method for electrolytic cell fishing slag charge |
| CN108889382B (en) * | 2018-07-18 | 2024-04-12 | 聊城信源集团有限公司 | Broken recycling system and method for slag scooping material of electrolytic tank |
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| CN110280348A (en) * | 2019-07-26 | 2019-09-27 | 陈江涛 | A kind of broken transfer device of town road solid waste |
| CN112158609A (en) * | 2020-09-23 | 2021-01-01 | 天地科技股份有限公司 | Intelligent coal storage, transportation and loading system and coordination control method thereof |
| CN114516513A (en) * | 2022-03-20 | 2022-05-20 | 山西太钢工程技术有限公司 | Method for recycling residual coal powder in skin of rollover locomotive |
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Application publication date: 20160420 |