Wet-type concentrate powder storage system for dressing plant

Abstract

The utility model discloses a wet-type concentrate powder storage system for a dressing plant, and belongs to the technical field of ore dressing. The wet-type concentrate powder storage system comprises a thickener, an underflow pump, a filter, a sealing-tape machine and a storage device which are sequentially connected according to the flow direction of concentrate pulp, wherein the plow discharger is fixed to the discharging end of the sealing-tape machine, the plow discharger and the sealing-tape machine cooperate with each other, and a plurality of evenly-distributed discharging points are formed according to the requirements of the warehousing device so that it can be guaranteed that the effective warehouse capacity of the warehousing device can be fully utilized. And a flat gate valve is transversely inserted into a bottom discharge hole of the ore drawing funnel. An air cannon, a vibrating funnel and an ore drawing valve are additionally arranged on the cylindrical ore storage bin and a discharging funnel of the cylindrical ore storage bin, so that the hardening of the wet-type iron ore concentrate is effectively avoided, and the loading process is smooth; according to the utility model, loading by adopting a grab crane is avoided, post personnel are reduced, the loading cost of concentrate in a dressing plant is reduced, the personnel efficiency and the automobile loading efficiency are improved, and the effects of energy conservation, consumption reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ore beneficiation, and more specifically to a wet concentrate powder storage system for a beneficiation plant. Background Art

[0002] The characteristics of Chinese iron ore are "poor, fine, and miscellaneous", and the production cost of iron concentrate is high. Therefore, it is necessary to adopt energy-efficient processes as much as possible to reduce costs and improve market competitiveness.

[0003] At present, the common method for storing iron ore concentrate in beneficiation plants in China is to use a grab bucket bin. The filtered iron ore concentrate in the beneficiation plant falls into the grab bucket bin, and then the grab bucket is used to transfer and stack the ore inside the bin, and the grab bucket is used to load the ore into trucks. For example, the iron concentrate bin of an iron ore beneficiation plant uses truck transportation; the iron concentrate bin of a mining company uses train transportation. The advantages of the existing iron concentrate storage and loading and transportation system are large storage capacity, strong buffering capacity, and not easy to cake. The disadvantages are large investment, high power consumption, many personnel required, and low loading efficiency.

[0004] After retrieval, the patent application with the publication number CN115009879A and the publication date of September 6, 2022, discloses a sand and gravel automatic loading system, including a storage bin. The storage bin is provided with one or more groups of discharge ports, and a conveying mechanism is correspondingly provided for each group of discharge ports. A lane is provided below the outlet of the conveying mechanism; the materials in the storage bin flow out through the discharge port group and flow into the cargo box of the vehicle parked on the lane under the conveyance of the conveying mechanism; the discharge port group is provided with a discharging device, the discharging device is electrically connected to a discharging electric control device, the discharging electric control device is electrically connected to a control system, and the discharging electric control device controls the discharging device under the control of the control system; the control system is electrically connected to a conveying electric control device, the conveying electric control device is electrically connected to the conveying mechanism, and the conveying electric control device controls the conveying mechanism under the control of the control system. This invention realizes automatic loading through the electromechanical control of the storage bin and the conveying mechanism. Through automatic loading, the labor cost during the loading process is reduced, and the labor intensity of workers is alleviated. However, when this utility model is applied to the storage and transfer of wet concentrate powder, there are problems such as poor material discharge from the storage bin, easy blockage of the discharge funnel, and the effective volume cannot be fully utilized. Content of the Utility Model

[0005] 1. Technical Problems to be Solved by the Utility Model

[0006] In view of the problems in the prior art that in the existing storage and transportation of concentrated ore, the grab bucket requires a large number of personnel, the loading efficiency of the truck is low, and the effective bin volume cannot be fully utilized, the utility model provides a wet concentrated ore powder storage system for a concentrator. By adding air cannons to the cylindrical receiving bin and its ore discharge funnel to form a vibrating funnel and an automatic detection device, the use of a grab crane for loading is avoided, the number of on-site personnel is reduced, the loading cost of the concentrated ore in the concentrator is reduced, the personnel efficiency and the truck loading efficiency are improved, and the effects of energy conservation, consumption reduction and efficiency increase are achieved.

[0007] 2. Technical Solution

[0008] To achieve the above object, the technical solution provided by the utility model is as follows:

[0009] A wet concentrated ore powder storage system for a concentrator, comprising a thickener, an underflow pump, a filter, a belt conveyor and a storage device connected in sequence according to the flow direction of the concentrated ore pulp; wherein, a plough diverter is fixed at the discharge end of the belt conveyor, and the plough diverter and the belt conveyor cooperate with each other to form a plurality of uniformly distributed discharge points according to the needs of the storage device, so as to ensure that the effective bin volume of the storage device is fully utilized. A flat gate valve is horizontally inserted at the bottom discharge port of the ore discharge funnel.

[0010] In a further technical solution, below the flat gate valve, a discharge valve is further connected to the bottom discharge port of the ore discharge funnel.

[0011] In a further technical solution, the storage device includes a receiving bin and an ore discharge funnel communicated with the bottom of the receiving bin; the vertical section of the ore discharge funnel is in a W shape, and there are at least two bottom discharge ports, so that when the concentrated ore is discharged, it can be evenly discharged into the carriage of the transport truck.

[0012] In a further technical solution, air cannons are fixedly connected to the outer walls of the receiving bin and the ore discharge funnel to improve the stability and sufficiency of the material discharge.

[0013] In a further technical solution, the air cannons are evenly arranged along the bin walls of the receiving bin and the ore discharge funnel, each group has a volume of 300L, and the working pressure is 0.4 - 0.8 Mpa, so as to ensure the stability of sufficient material discharge.

[0014] In a further technical solution, the upper part of the receiving bin is cylindrical and the lower part is conical, with thorough material discharge. Manganese steel liners are installed on the inner wall, which can cooperate with the vibration effect of the air cannons and strengthen the strength of the bin wall at the same time.

[0015] 3. Beneficial Effects

[0016] Adopting the technical solution provided by the utility model, compared with the prior art, it has the following beneficial effects:

[0017] The wet concentrate powder storage system of the beneficiation plant of the utility model effectively avoids the caking of wet iron concentrate by adding air cannons, vibrating funnels and ore discharge valves to the cylindrical ore bin and its blanking funnel, and the loading process is smooth; it avoids using a grab crane for loading, reduces the number of on-site personnel, reduces the loading cost of the concentrate in the beneficiation plant, improves the personnel efficiency and the truck loading efficiency, and has the effects of energy conservation, consumption reduction and efficiency increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Structural schematic diagram of the wet concentrate powder storage system of the beneficiation plant in a specific embodiment;

[0019] Figure 2 Structural schematic diagram of the storage device in a specific embodiment;

[0020] Figure 3 is Figure 2 side view of;

[0021] Figure 4 is Figure 2 top view of;

[0022] Figure 5 Structural schematic diagram of the storage device in a specific embodiment;

[0023] Figure 6 is Figure 5 top view of.

[0024] In the figure: 1-concentrate pulp; 11-filter press; 12-belt conveyor; 13-plow type tripper; 14-thickener; 15-underflow pump;

[0025] 2-storage device; 21-receiving bin; 22-discharge funnel; 23-air cannon; 24-flat gate valve; 25-ore discharge valve;

[0026] 3-platform scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To further understand the content of the utility model, the utility model will be described in detail with reference to the accompanying drawings.

[0028] Embodiment 1

[0029] The wet concentrate powder storage system of the beneficiation plant in this embodiment, as shown in Figure 1 , 2 , 3, 4, includes a thickener 14, an underflow pump 15, a filter press 11, a belt conveyor 12 and a storage device 2 connected in sequence according to the flow direction of the concentrate pulp 1; wherein, at least two uniformly distributed discharge points are arranged between the discharge end of the belt conveyor 12 and the storage device 2 to ensure the full utilization of the effective storage capacity of the storage device 2.

[0030] In specific use, the concentrate pulp 1 is injected into the cylindrical shallow tank with a conical bottom of the thickener 14 through the feed port of the thickener 14. Under the action of the gravity sedimentation of the concentrate, the concentrate is pumped into the filter 11 through the discharge port at its bottom by the underflow pump 15. The underflow pump 15 is generally a slurry pump and can be 2 or more in parallel. After being concentrated and filtered by the filter 11, the concentrate filter cake is obtained, and it directly falls from the discharge port of the filter 11 onto the belt conveyor 12. The discharge end of the belt conveyor 12 is located above the receiving bin 21 of the storage device 2. The concentrate filter cake falls into the receiving bin 21 from the discharge end of the belt conveyor 12. Since the fluidity of the concentrate filter cake is relatively poor, it is likely to accumulate in the receiving bin 21, resulting in a reduction in the effective bin capacity of the receiving bin 21. Therefore, at least two uniformly distributed discharge points need to be set between the discharge end of the belt conveyor 12 and the storage device 2. In this embodiment, a distributor is provided on the surface of the belt conveyor 12 near the discharge end of the belt conveyor 12. The side end of the distributor is fixedly connected to the frame of the belt conveyor 12, and multi-point discharging is realized through the distributor, thereby realizing the full utilization of the effective bin capacity of the receiving bin 21. The distributor is preferably a plow-type discharger 13. The plow-type discharger 13 and the belt conveyor 12 cooperate with each other. According to the needs of the storage device 2, multiple uniformly distributed discharge points can be set. When one plow-type discharger 13 is set, two material dropping points are formed on the two sides of the plow-type discharger 13, and three material dropping points in a uniformly distributed "pin" shape can be formed together with the material dropping point at the end of the belt conveyor 12. The receiving bin 21 in this embodiment is a steel structure bin with a bin capacity of 883 m 3 , with a bulk density of 2.5 T / m 3 , and can store 2200 T of the concentrate filter cake.

[0031] Embodiment 2

[0032] The wet concentrate powder storage system of the concentrator in this embodiment has the same basic structure as that in Embodiment 1. The differences or improvements are as follows: The storage device 2 includes a receiving bin 21 and a discharge hopper 22 connected to the bottom of the receiving bin 21. A flat gate valve 24 is horizontally inserted at the bottom of the discharge hopper 22, and the valve is closed when the concentrate filter cake is falling. Below the flat gate valve 24, a discharge valve 25 is further connected to the bottom end of the discharge hopper 22. The discharge valve 25 in this embodiment adopts a hydraulic jaw valve and drives the jaw valve through an electro-hydraulic push rod. The vertical cross-section of the discharge hopper 22 is in a W shape, forming at least two bottom discharge ports, so as to evenly discharge the concentrate onto the carriage of the transport truck when discharging the concentrate, thereby improving the effective volume of the carriage. Air cannons 23 are fixedly connected to the outer walls of the receiving bin 21 and the discharge hopper 22 to improve the stability and sufficiency of the material discharge. The air cannons 23 are evenly arranged along the bin walls of the receiving bin 21 and the discharge hopper 22, with each group having a volume of 300L and a working pressure of 0.4 - 0.8 Mpa to ensure the stability of sufficient material discharge. The upper part of the receiving bin 21 is cylindrical and the lower part is conical, with thorough material discharge. Manganese steel liners are installed on the inner wall to strengthen the strength of the bin wall while cooperating with the vibration effect of the air cannons 23. The water content of the concentrate filter cake after concentration and filtration by the filter press 11 is ≤ 10%, the fineness is below 200 mesh, -0.074mm, accounting for 50% - 95%, and the grade of TFe content is 56% - 71%.

[0033] The loading process of the wet concentrate powder storage system of the concentrator in this embodiment is as Figure 2 、 3 shown. When the iron concentrate in the receiving bin 21 needs to be transported externally, the external transport truck drives to the weighbridge 3 under the bottom of the discharge hopper 22. After the empty truck weighing is completed, the hydraulic jaw valve at the bottom of the bin is automatically opened for discharging, and at the same time, the air cannons 23 on the bin wall are started. When the truck reaches the specified loading weight, the hydraulic jaw valve is automatically closed.

[0034] The loading process of the wet concentrate powder storage system of the concentrator in this embodiment, by adding air cannons 23 to the bin of the cylindrical receiving bin 22 and its discharge hopper, forms a vibrating hopper and a discharge valve 25 device, effectively avoiding the caking of wet iron concentrate, and the loading process is smooth; it avoids using a grab crane for loading, reduces the number of on-site personnel, reduces the loading cost of the concentrator's concentrate, improves the personnel efficiency and the truck loading efficiency, and has the effects of energy conservation, consumption reduction, and efficiency increase.

[0035] Embodiment 3

[0036] The wet concentrate powder storage system of the concentrator in this embodiment has the same basic structure as that in Embodiment 2. The differences or improvements are as follows: It is applied to iron concentrate filter cake with a water content of ≤ 10%, a fineness of 85% at -0.074mm, and a grade of TFe content of 65%; the receiving bin 21 is 2 or more in parallel, with the upper cylindrical part having a diameter of 10m and the lower part being conical, and the inclined wall inclination angle being 70°; asFigure 5 , 6 As shown in 6 , in this embodiment, preferably two belt conveyors 12 for wet concentrate feeding are located on the center line above the ore bin of the receiving bin 21; the center line of the head pulley of the belt conveyor 12 is located on the center line of the rightmost receiving bin 21 of the ore bin, and the shortest distance from the right side of the receiving bin 21 to the bin wall is at the position of 1 / 4 of the diameter. The shortest distance from the plough diverter 2 to the bin wall is at the position of 1 / 4 of the diameter. This position can maximize the utilization of the effective bin capacity of the two receiving bins 21; the belt conveyor 12 spans above the bin openings of the two receiving bins 21. There are three plough diverters 13 arranged in parallel. Among them, two plough diverters 13 are above the bin opening of one receiving bin 21, forming four symmetrically distributed blanking points for the concentrate filter cake on the left and right. The other plough diverter 13 is above the bin opening of the other receiving bin 21, forming three blanking points distributed in a triangular pattern. An ultrasonic radar level detector is also installed on the upper part of the cylinder of the receiving bin 21 to automatically detect and real-time detect the level of the ore bin in the receiving bin 21. Two weighbridges 3 are correspondingly arranged at the bottoms of the two receiving bins 21, forming two truck loading lines. Six groups of air cannons 23 are evenly distributed circumferentially on the outer walls of the two receiving bins 21. The outer wall of the ore discharge funnel 22 is evenly distributed circumferentially in 21 groups, with each group having a volume of 300L and a working pressure of 0.6 Mpa; the rated thrust of the electro-hydraulic push rod driving the jaw valve is 17.5 kN.

[0037] In the wet concentrate powder storage system of the concentrator in this embodiment, during the process of the concentrate filter cake falling into the two receiving bins 21, the air cannons 23 on the outer wall of the bottom of the receiving bin 21 are opened to further increase the effective bin capacity of the receiving bin 21. After measurement, the bin capacity utilization rate is 99%, thus realizing the maximum utilization of the effective bin capacity of the receiving bin 21. During the loading process, the air cannons 23 on the outer wall of the ore discharge funnel 22, 21 groups of air cannons 23, are opened to make the ore discharge funnel 22 form a vibrating funnel, and the discharging is more thorough, avoiding damage to the hydraulic jaw valve due to accumulated materials when the valve is opened and closed.

[0038] In the wet concentrate powder storage system of the concentrator in this embodiment, by adding air cannons 23 to the cylindrical receiving bin 21 and its ore discharge funnel 22 to form a vibrating funnel and an automatic detection device, the use of a grab crane for loading is avoided, reducing the number of on-site personnel, lowering the loading cost of the concentrate in the concentrator, improving the personnel efficiency and the truck loading efficiency, and having the effects of energy conservation, consumption reduction and efficiency increase.

[0039] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention. The actual structure and manufacturing steps are not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments to this technical solution without creative work without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A wet concentrate powder storage system for a mineral processing plant, characterized by: The invention comprises a thickener (14), an underflow pump (15), a filter (11), a belt conveyor (12) and a storage device (2) which are connected in sequence according to the flow direction of the concentrate slurry (1); wherein: A plough-type discharger (13) is fixed to the discharge end of the belt conveyor (12); The storage device (2) comprises a receiving bin (21) and a ore discharge hopper (22) connected to the bottom of the receiving bin (21); the ore discharge hopper (22) has at least two bottom discharge ports; A flat gate valve (24) is laterally inserted into the bottom discharge port of the ore-drawing hopper (22).

2. The wet concentrate powder storage system of a ore dressing plant according to claim 1, characterized in that: Below the flat gate valve (24), the bottom discharge port of the ore discharge hopper (22) is also connected to an ore discharge valve (25).

3. The wet concentrate powder storage system of the ore dressing plant according to claim 2 is characterized by: Air cannons (23) are fixedly connected to the outer walls of the receiving bin (21) and the ore discharge hopper (22).

4. The wet concentrate powder storage system of a ore dressing plant according to claim 3, characterized in that: The air cannons (23) are evenly arranged along the walls of the receiving bin (21) and the ore discharge hopper (22), and the volume of each group is 300L.

5. The wet concentrate powder storage system of a ore dressing plant according to claim 3, characterized in that: The vertical cross section of the ore drawing funnel (22) is W-shaped.

6. The wet concentrate powder storage system for a ore dressing plant according to any one of claims 1 to 5, characterized in that: The upper part of the receiving bin (21) is cylindrical and is equipped with an ultrasonic radar material level detector, and the lower part is conical and has a manganese steel lining plate installed on the inner wall.

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