A long-distance pipeline transportation slurry preparation system

Abstract

The present invention provides a long-distance pipeline transportation slurry preparation system, which belongs to the field of crushing-grinding technology in a mineral processing plant. The vehicle-mounted unit includes a vehicle head and an ultra-fine crushing module car plate and a grinding module car plate which are connected in series with each other from the rear direction and are towed by the vehicle head. The ultra-fine crushing module and the grinding module are respectively connected to the ultra-fine crushing module car plate and the grinding module car plate; the ultra-fine crushing module includes a portal frame a and a crushing unit and a discharge chute installed on the portal frame a from top to bottom, and the crushing unit adopts a high-pressure roller mill; an ultra-fine crushing product belt conveyor is hung on one side of the ultra-fine crushing module car plate, and a fine crushing product bucket elevator is vertically provided on the outer side of the head of the ultra-fine crushing module car plate, and the head chute of the fine crushing product bucket elevator is connected to the grinding module, and the grinding module adopts a vertical mill; in the working state, after the ultra-fine crushing product belt conveyor is removed from the side of the ultra-fine crushing module car plate, its tail is located below the discharge chute, and its head is located below the fine crushing product bucket elevator.

Description

Technical Field

[0001] The invention belongs to the technical field of crushing and grinding in ore dressing plants, and in particular relates to a slurry preparation system for long-distance pipeline transportation. Background Art

[0002] Currently, in many open-pit non-magnetic mines, the majority of processes involve crushing and grinding the ore to the required particle size for complete disaggregation. Subsequently, subsequent operations such as gravity separation or flotation are performed to obtain the final concentrate. Currently, for non-magnetic ores, the embedded particle size (P80) often ranges from 50 to 80 microns, making it difficult to achieve the desired disaggregation using open-circuit ball milling. Furthermore, if ore disaggregation is achieved through grinding, the resulting ore with a P80 of 50 to 80 microns easily forms a pseudo-homogeneous flow. Furthermore, most non-magnetic ores are soft and have a low hardness. This type of ground slurry is particularly suitable for long-distance pipeline transportation, which is significantly less expensive than belt conveyors. Therefore, if ore grinding can be carried out at the stope, and the product from grinding and disaggregation can be transported via long-distance pipelines to a concentrator for sorting, this would significantly reduce ore transportation costs.

[0003] Generally, the mining area of open-pit mines changes year by year. If the crushing, grinding and transportation tools can be integrated, and the integrated equipment can be quickly relocated as the mining area changes, then the entire crushing and grinding processing facilities for long-distance pipeline transportation of slurry preparation can be relocated. This will enable the repeated use of equipment, greatly reduce the transportation distance of mined ore, and greatly reduce equipment purchase costs and production costs. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a long-distance pipeline transportation slurry preparation system that can integrate the high-pressure roller mill and vertical mill operations of non-magnetic ores into a mobile carrier, and the entire processing facility can be quickly relocated, so as to reduce equipment and plant investment, reduce operating costs and realize the reuse of processing facilities in different mines.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a long-distance pipeline transportation slurry preparation system, which at least includes an ultra-fine crushing module, a grinding module, and a vehicle-mounted unit; the vehicle-mounted unit includes a vehicle head and an ultra-fine crushing module vehicle plate and a grinding module vehicle plate connected in series from the vehicle tail direction, which are pulled by the vehicle head, the ultra-fine crushing module is connected to the ultra-fine crushing module vehicle plate, and the grinding module is connected to the grinding module vehicle plate; the ultra-fine crushing module includes a portal frame a and a crushing unit and a discharge chute installed on the portal frame a from top to bottom, and the crushing unit adopts High-pressure roller grinding mill; a belt conveyor for ultra-fine crushing products is hung on one side of the ultra-fine crushing module car plate, and a bucket elevator for fine crushing products is vertically provided on the outer side of the head of the ultra-fine crushing module car plate, and the head chute of the bucket elevator for fine crushing products is connected to the grinding module, and the grinding module adopts a vertical mill; when in working state, after the belt conveyor for ultra-fine crushing products is removed from the side of the ultra-fine crushing module car plate, its tail is located below the discharge chute and its head is located below the bucket elevator for fine crushing products; a hydraulic power device is respectively provided on the ultra-fine crushing module car plate and the grinding module car plate.

[0006] Furthermore, hydraulic rods are connected to both sides of the ultra-fine crushing module car plate through rotating shaft a, and the output shaft end of the hydraulic rod is rotatably connected to the side wall of the portal frame a through rotating shaft b. The side wall of the portal frame a is also rotatably connected to the tail end of the ultra-fine crushing module car plate through rotating shaft c.

[0007] Furthermore, when the hydraulic rod is retracted to be flush with the side wall of the ultra-fine crushing module vehicle plate and its output shaft is fully retracted, the portal frame a is horizontally retracted onto the ultra-fine crushing module vehicle plate; when the hydraulic rod is rotated upward around the rotation axis a to the maximum angle with the side wall of the ultra-fine crushing module vehicle plate and its output shaft is fully extended, the portal frame a is completely pushed out to the rear side of the ultra-fine crushing module vehicle plate and is perpendicular to the ultra-fine crushing module vehicle plate.

[0008] Furthermore, the control signal of the hydraulic lever is connected to the control box a, which is installed on the ultra-fine crushing module vehicle panel.

[0009] Furthermore, the portal frame a is connected to the high-pressure roller mill feeding platform, the high-pressure roller mill base platform, the discharge platform and the belt conveyor platform from top to bottom respectively; the high-pressure roller mill is installed on the high-pressure roller mill base platform, the high-pressure roller mill feeding platform is located above the high-pressure roller mill, and the discharge chute is installed on the discharge platform; after the portal frame a is completely pushed out, the discharge platform is located above the ultra-fine crushing product belt conveyor, and the ultra-fine crushing product belt conveyor is installed on the belt conveyor platform; the discharge platform is open in the middle.

[0010] Furthermore, the belt conveyor for ultra-fine crushing products is hung horizontally on one side of the ultra-fine crushing module car plate through a number of hooks arranged at equal intervals on the sides of its lower support legs and a hanging shaft installed on the side of the ultra-fine crushing module car plate; in the working state, the belt conveyor for ultra-fine crushing products is taken out from the side of the ultra-fine crushing module car plate by a crane, and is bolted to the ultra-fine crushing module car plate and the belt conveyor platform through the support legs.

[0011] Furthermore, the high-pressure roller mill includes a main housing, built-in rollers arranged inside the main housing, and a transmission part connected to the built-in rollers; the transmission part is installed on the high-pressure roller mill base platform through the support a, and the main housing is installed on the high-pressure roller mill base platform through the support b.

[0012] Furthermore, when the portal frame a is erected, a ground anchor a is provided at each of the four corners of the bottom thereof, and the anchor rods of the four ground anchors a are fully threaded structures.

[0013] The beneficial effects of the present invention include:

[0014] 1) The system of the present invention integrates ultra-fine crushing, grinding facilities, and vehicle-mounted units for preparing slurry for long-distance pipeline transportation. The high-pressure roller mill-vertical mill controls the final particle size of the ore to P80 = 50-80 microns, achieving mineral dissociation and creating conditions for achieving good separation indicators in subsequent long-distance pipeline transportation and separation operations of the slurry.

[0015] 2) The high-pressure roller mill with ultra-fine crushing is used to feed the vertical mill. The high-pressure roller mill adopts the extrusion crushing method, and the product particle size is large. By adjusting the gap between the built-in rollers, the particle size of the discharged product can be reduced to below 5-10mm. After the soft ore of this particle size is fed into the vertical mill, the high-speed rotating stirring and lifting blades of the vertical mill have little wear, which greatly extends the service life of the vertical mill.

[0016] 3) The ultra-fine crushing and grinding process equipment is integrated and installed on a single locomotive, eliminating the need for the various workshops typically found in traditional fixed plant buildings and reducing capital investment. All equipment for the ultra-fine crushing / grinding modular process, including the belt conveyor and power unit, is integrated into the locomotive, enabling full mobility of these ore processing facilities. This allows for rapid relocation as mining areas change, significantly reducing ore transportation costs and lowering production costs.

[0017] 4) After transporting each module to the new destination, the locomotive can be driven away, thereby realizing other uses of the locomotive and improving its utilization rate.

[0018] 5) The ultra-fine crushing module is integrated into one car plate, and the grinding module is integrated into one car plate. With this unit-by-unit integration method, each unit can be transported to other mines by the car head and combined after the service of the mine is completed, thereby realizing the repeated use of equipment and improving the utilization rate of equipment.

[0019] 6) Ultra-fine crushing products utilize bucket elevators to vertically lift the ore, significantly reducing the spacing between adjacent operating sections and facilitating the integration of all related facilities into a vehicle-mounted unit. The belt conveyor for ultra-fine crushing products is suspended from the vehicle side during transport and positioned horizontally beneath the discharge chute during operation. This ensures that the belt conveyor and the main crushing and grinding facilities do not overlap during transport or operation, facilitating the integration of all facilities into a single vehicle-mounted unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention in working state;

[0021] Figure 2 It is a block diagram of the overall structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the transportation state of the overall structure of the present invention.

[0023] In the figure: 1. Ultra-fine crushing module; 2. Grinding module; 3. Car head; 4. Carriage plate of ultra-fine crushing module; 5. Carriage plate of grinding module; 6. Hydraulic power unit; 7. Grinding medium adding facility; 8. Grinding product conveying facility;

[0024] 101. Gantry a; 102. Discharge chute; 103. Rotating shaft b; 104. Rotating shaft c; 105. High-pressure roller grinding mill feeding platform; 106. High-pressure roller grinding mill base platform; 107. Discharge platform; 108. Belt conveyor platform; 109. Mainframe; 110. Built-in rollers; 111. Transmission unit; 112. Support a; 113. Support b; 114. Ground anchor a.

[0025] 201, vertical mill; 202, feed box; 203, medium addition box; 204, water supply pipe; 205, portal frame b; 206, hydraulic rod b; 207, vertical mill feed platform; 208, vertical mill base platform; 209, base plate; 210, ground anchor b; 211, pipeline; 212, control box b;

[0026] 401. Belt conveyor for ultra-finely crushed products; 402. Bucket elevator for finely crushed products; 403. Head chute; 404. Hydraulic rod; 405. Rotating shaft a; 406. Control box a; 407. Hook; 408. Hanging shaft; 409. Support legs;

[0027] 701, medium storage yard; 702, medium adding truck crane;

[0028] 801. Conveying and mixing tank; 802. Conveying pump; 803. Conveying pipeline; 804. Lifting lug. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] In the description of the present invention, it should be noted that the terms "vertical", "horizontal", "up, down, front, back, left, right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0031] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] The present embodiment provides a long-distance pipeline transportation slurry preparation system comprising an ultra-fine crushing module 1 , a grinding module 2 , a grinding medium adding facility 7 , and a grinding product transportation facility 8 .

[0034] The crushing unit of the ultra-fine crushing module 1 adopts a high-pressure roller mill, which is composed of a main body box 109, a built-in pair of rollers 110 and a transmission part 111; the grinding module 2 adopts a vertical mill 201. The grinding module 2 also includes a feed box 202 and a medium addition box 203 connected to the vertical mill 201. The feed box 202 is connected to a water supply pipe 204. The grinding product conveying facility 8 is composed of a conveying and stirring tank 801, a conveying pump 802 and a conveying pipeline 803. The ultra-fine crushing module 1 and the grinding module 2 are integrated into a vehicle-mounted unit. The grinding medium addition facility 7 and the grinding product conveying facility 8 are arranged on both sides of the grinding module car plate 5 where the grinding module 2 is located. The grinding medium addition facility 7 includes a medium yard 701 and a medium addition truck crane 702.

[0035] The vehicle-mounted unit consists of a superfine crushing module deck 4 and a grinding module deck 5, which are connected in series from the rear of the vehicle, towed by a locomotive 3. The rear end of the superfine crushing module deck 4 is pivotally connected to the lower side wall of the portal frame a101 of the superfine crushing module 1, while the rear end of the grinding module deck 5 is pivotally connected to the lower side wall of the portal frame b205 of the grinding module 2.

[0036] A super-fine crushing product belt conveyor 401 is provided on one side of the super-fine crushing module car plate 4. The super-fine crushing product belt conveyor 401 is hung horizontally on one side of the super-fine crushing module car plate 4 after being connected to the hanging shaft 408 on the side of the super-fine crushing module car plate 4 through a number of hooks 407 arranged at equal intervals on the side of its lower support legs 409.

[0037] A fine crushing product bucket elevator 402 is vertically provided on the outer side of the head of the ultra-fine crushing module car plate 4. The head of the fine crushing product bucket elevator 402 is located above the feed box 202 of the grinding module 2. The feed box 202 is connected to the head chute 403 of the fine crushing product bucket elevator 402.

[0038] In operation, the ultra-fine crushing product belt conveyor 401 is removed from the side of the ultra-fine crushing module deck 4 by a crane and bolted to the ultra-fine crushing module deck 4 and the belt conveyor platform 108 via support legs 409. The tail end of the ultra-fine crushing product belt conveyor 401 is located below the discharge chute 102 of the ultra-fine crushing module 1, and the head end is located below the bucket elevator 402 for fine crushing products.

[0039] The hydraulic power device 6 of each car plate is provided below the ultra-fine crushing module car plate 4 and the grinding module car plate 5. The control signal of the hydraulic rod 404 of the ultra-fine crushing module car plate 4 is connected to the control box a406, and the hydraulic rod b206 of the grinding module car plate 5 is connected to the control box b212.

[0040] Hydraulic rods 404 are located on either side of the ultra-fine crushing module deck 4. When the hydraulic rods 404 are fully retracted, the portal a101 folds back to be flush with the ultra-fine crushing module deck 4. When the hydraulic rods 404 are fully extended, the portal a101 is pushed and rotated to be perpendicular to the ultra-fine crushing module deck 4. Four platforms are connected to the portal a101 of the ultra-fine crushing module 1. When the portal a101 is raised, from top to bottom, they are the high-pressure roller mill feeding platform 105, the high-pressure roller mill base platform 106, the discharge platform 107, and the belt conveyor platform 108.

[0041] The transmission unit 111 of the HPGR of the ultra-fine crushing module 1 and the supports a112 and b113 of the mainframe housing 109 are connected to the HPGR base platform 106. Each of the four platforms is bolted to the portal frame a101 via a square ring beam. When portal frame a101 is erected, four ground anchors a114 are located below its four rectangular steel columns. The anchors a114 are circular with a bottom diameter of 500-1000mm, and the anchor rods of the four anchors a114 are fully threaded.

[0042] The discharge chute 102 of the ultra-fine crushing module 1 is installed on the discharge platform 107. After the portal frame a101 is completely pushed out, the discharge platform 107 is located above the ultra-fine crushing product belt conveyor 401, and the middle part of the discharge platform 107 is open.

[0043] When the hydraulic rods b206 on either side of the grinding module deck 5 are fully retracted, the portal b205 folds back to be flush with the grinding module deck 5. When the hydraulic rods b206 are fully extended, the portal b205 is rotated perpendicular to the grinding module deck 5. Two platforms are connected to the portal b205. When the portal b205 is raised, the vertical mill feed platform 207 and the vertical mill base platform 208 are located from top to bottom. The feed box 202 and the media addition box 203 are mounted on the vertical mill feed platform 207. The vertical mill 201 is mounted on the vertical mill base platform 208 via a base plate 209. Both platforms are bolted to the portal frame B205 via a square ring beam. When the portal frame B205 is erected, four ground anchors B210 are installed at the bottom of its four rectangular steel columns. These anchors B210 are circular with a bottom diameter of 500-1000mm, and the anchor rods of the four anchors B210 are fully threaded. The discharge end of the vertical mill 201 delivers slurry product via pipe 211 to the conveying and mixing trough 801 of the grinding product conveying facility 8. The conveying and mixing trough 801 is a steel trough, and its lifting lugs 804 allow it to be hoisted to the vehicle-mounted unit.

[0044] Based on the above embodiment, the dissociated grinding slurry product of the present invention is transported to a fixed concentrator through a long-distance high-concentration pipeline, which has low transportation cost and good adaptability to terrain.

[0045] The products of the high-pressure roller mill are ground using a one-stage open-circuit vertical mill. Since the vertical mill uses a built-in rotating stirring device to provide power, its rotation speed is much higher than the drum speed of the ball mill, so the grinding capacity density it can provide is higher than that of the ball mill. The use of a one-stage open-circuit vertical mill can grind the ore to P80 = 50-80 microns, thereby achieving material dissociation and creating conditions for subsequent selection to obtain high-index products.

[0046] Grinding media is added by a media adding truck crane, and the conveying and mixing tank can also be lifted onto the train body for transportation, thus realizing the mobility of all auxiliary facilities and then the mobility and reuse of all ore processing facilities.

[0047] The ultra-fine crushing and grinding modules are integrated into a train body through their portal frames. The portal frames are pushed by hydraulic rods to realize the conversion of the modules between horizontal transportation state and vertical working state, thereby quickly realizing the transfer of modules from one mining area to another and ensuring the high operating rate of the entire operation.

[0048] When operating, the ultra-fine crushing and grinding modules are anchored to the foundation by four circular ground anchors at their bases. This protects the vehicle body from stress during operation. If a malfunction occurs with the ultra-fine crushing and grinding modules, hydraulic rods can be used to fold them back to a horizontal position. The individual components of the two modules are bolted to the platforms on each level, and the platforms on each level are bolted to the portal frame. Removing these bolted connections allows the individual components of the ultra-fine crushing and grinding modules to be vertically lifted out, enabling rapid inspection and maintenance of the module's components. The control signals of the hydraulic rods are connected to the control box, resulting in a high degree of automation.

Claims

1. A long-distance pipeline transportation slurry preparation system, characterized in that: The invention comprises at least an ultrafine crushing module (1), a grinding module (2), and a vehicle-mounted unit; the vehicle-mounted unit comprises a vehicle head (3) and an ultrafine crushing module vehicle plate (4) and a grinding module vehicle plate (5) which are connected in series with each other from the vehicle tail direction and are towed by the vehicle head (3); the ultrafine crushing module (1) is connected to the ultrafine crushing module vehicle plate (4), and the grinding module (2) is connected to the grinding module vehicle plate (5); the ultrafine crushing module (1) comprises a portal frame a (101) and a crushing unit and a discharge chute (102) which are installed on the portal frame a (101) from top to bottom, and the crushing unit adopts a high-pressure roller mill; an ultrafine crushing module vehicle plate (4) is connected to one side of the ultrafine crushing module vehicle plate (4); A crushed product belt conveyor (401) is provided, and a fine crushed product bucket elevator (402) is vertically provided on the outer side of the head of the ultra-fine crushing module car plate (4). The head chute (403) of the fine crushed product bucket elevator (402) is connected to the grinding module (2). The grinding module (2) adopts a vertical mill (201). When in operation, after the ultra-fine crushed product belt conveyor (401) is removed from the side of the ultra-fine crushing module car plate (4), its tail is located below the discharge chute (102) and its head is located below the fine crushed product bucket elevator (402). A hydraulic power device (6) is provided on each of the ultra-fine crushing module car plate (4) and the grinding module car plate (5). The portal frame a (101) is connected to the high-pressure roller mill feeding platform (105), the high-pressure roller mill base platform (106), the discharge platform (107) and the belt conveyor platform (108) from top to bottom; the high-pressure roller mill is installed on the high-pressure roller mill base platform (106), the high-pressure roller mill feeding platform (105) is located above the high-pressure roller mill, and the discharge chute (102) is installed on the discharge platform (107); after the portal frame a (101) is completely pushed out, the discharge platform (107) is located above the super-fine crushed product belt conveyor (401), and the super-fine crushed product belt conveyor (401) is installed on the belt conveyor platform (108); the discharge platform (107) is open in the middle; The super-fine crushing product belt conveyor (401) is hung horizontally on one side of the super-fine crushing module vehicle plate (4) through a plurality of hooks (407) arranged at equal intervals on the side of its lower support legs (409) and a hanging shaft (408) installed on the side of the super-fine crushing module vehicle plate (4); in the working state, the super-fine crushing product belt conveyor (401) is taken out from the side of the super-fine crushing module vehicle plate (4) by a crane, and is then bolted to the super-fine crushing module vehicle plate (4) and the belt conveyor platform (108) through the support legs (409).

2. A long distance pipeline transportation slurry preparation system according to claim 1, characterized in that: Both sides of the ultra-fine crushing module vehicle plate (4) are connected to hydraulic rods (404) via rotating shafts a (405), and the output shaft ends of the hydraulic rods (404) are rotatably connected to the side walls of the portal frame a (101) via rotating shafts b (103). The side walls of the portal frame a (101) are also rotatably connected to the rear end of the ultra-fine crushing module vehicle plate (4) via rotating shafts c (104).

3. The long-distance pipeline transportation slurry preparation system according to claim 2 is characterized in that: When the hydraulic rod (404) is retracted to be flush with the side wall of the ultra-fine crushing module car plate (4) and its output shaft is fully retracted, the portal frame a (101) is horizontally retracted onto the ultra-fine crushing module car plate (4); when the hydraulic rod (404) is rotated upward around the rotation axis a (405) to the maximum angle with the side wall of the ultra-fine crushing module car plate (4) and its output shaft is fully extended, the portal frame a (101) is completely pushed out to the rear side of the ultra-fine crushing module car plate (4) and is perpendicular to the ultra-fine crushing module car plate (4).

4. The long-distance pipeline transportation slurry preparation system according to claim 3 is characterized in that: The control signal of the hydraulic rod (404) is connected to the control box a (406), and the control box a (406) is installed on the ultra-fine crushing module vehicle plate (4).

5. The long-distance pipeline transportation slurry preparation system according to claim 1 is characterized in that: The high-pressure roller mill comprises a main housing (109), a built-in pair of rollers (110) arranged inside the main housing (109), and a transmission part (111) connected to the built-in pair of rollers (110); the transmission part (111) is installed on a base platform (106) of the high-pressure roller mill via a support a (112), and the main housing (109) is installed on the base platform (106) of the high-pressure roller mill via a support b (113).

6. A long-distance pipeline transportation slurry preparation system according to any one of claims 1 to 5, characterized in that: When the portal frame a (101) is erected, a ground anchor a (114) is provided at each of the four corners of the bottom thereof, and the anchor rods of the four ground anchors a (114) are fully threaded structures.

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