A tail mortar collecting, buffering and feeding device and method

Abstract

The present invention relates to a tailings mortar collecting, buffering and feeding device and method, which are characterized in that: the device includes a columnar box body with a top plate and a base, an inclined diversion plate fixed on the inner wall of the lower part of the columnar box body, a diversion and buffering barrel fixed between the top plate of the columnar box body and the inclined diversion plate, a feed pipe passing through the outer wall of the columnar box body and tangentially communicating with the inner cavity of the diversion and buffering barrel, a collecting and mixing cone barrel fixed on the inner wall of the diversion and buffering barrel, a grid screen arranged at the top of the collecting and mixing cone barrel, and a discharge pipe arranged at the lower part of the side wall of the box body; the upper opening diameter of the collecting and mixing cone barrel is the same as the inner diameter of the diversion and buffering barrel, and an annular buffer space is formed between the diversion and buffering barrel and the inner wall of the columnar box body. The advantages of the present invention are: it not only realizes the collection, mixing, pressure reduction and energy dissipation of the tailings mortar, enables the tailings mortar to be fed smoothly and gently to the tailings mortar concentration and storage facilities for filling, but also avoids the deposition of tailings and pipe blockage.

Description

Technical Field

[0001] The present invention relates to a mine filling system, in particular to a tailings slurry collection, buffering and feeding device and method for assisting mine filling, which realizes the collection and mixing of tailings slurry, pressure reduction and energy dissipation, and smooth and gentle feeding, while avoiding the deposition of tailings

[0002] sand and pipe blockage. Background Art

[0003] The current feeding method of tailings slurry in the filling system is to directly transport the tailings slurry from the concentrator to the tailings slurry concentration and storage facilities (sand bins or deep cone thickeners) for filling, and mix it with flocculants to accelerate the sedimentation and concentration of tailings. This feeding method has certain problems: the tailings slurry transported from the bottom flow of the concentrator in the concentrator has a certain residual pressure, and directly entering the tailings slurry concentration and storage facilities will generate a large impact force, interfering with the sedimentation and concentration effects of tailings, increasing the dosage of flocculants, increasing the operating cost, and at the same time affecting the overflow

[0004] water quality of the tailings slurry concentration and storage facilities.

[0005] For the filling systems of mines mined by large-scale filling methods, the current technical experience at home and abroad is still shallow. Most of them refer to the design and construction of mines mined by small-scale filling methods, and there are many areas worthy of optimization and improvement. For mines mined by large-scale filling methods, in order to solve the problem of large flow rate of tailings slurry transported from the bottom flow of the concentrator in the concentrator, multiple pipelines are usually used to evenly transport it to the tailings slurry concentration and storage facilities for filling. However, in order to ensure the sedimentation and concentration effects of tailings, the feed pipe of the tailings slurry concentration and storage facilities usually uses a single pipe, and the tailings slurry must

[0006] be collected and mixed before entering the tailings slurry concentration and storage facilities.

[0007] The patent with the publication number CN 104763468 B discloses a tailings mortar collection, buffering and feeding device and method, which includes a box body with a top plate and a base, a diversion and collection barrel fixed below the top plate of the box body and extending downward along the height direction of the box body, a mixing overflow buffer barrel fixed above the base of the box body and extending upward along the height direction of the box body, a feed pipe communicated with the inner cavity of the diversion and collection barrel, a discharge pipe arranged at the lower part of the side wall of the box body, and a grid screen arranged in the diversion and collection barrel. The upper edge of the mixing overflow buffer barrel is not lower than the lower edge position of the diversion and collection barrel, and the diameter of the mixing overflow buffer barrel is larger than that of the diversion and collection barrel, forming an annular overflow port therebetween. An annular buffer space is formed between the mixing overflow buffer barrel and the side wall of the box body. The tailings mortar from the concentrator enters the diversion and collection barrel through the feed pipe, and after filtering out large waste residues through the grid screen, it flows directly into the mixing overflow buffer barrel. After being collected and mixed in the mixing overflow buffer barrel, it overflows through the annular overflow port into the annular buffer space between the box body and the mixing overflow buffer barrel, and finally flows out through the discharge pipe. Although this patent realizes the collection and mixing of tailings mortar, pressure reduction and energy dissipation, and gentle feeding, when the tailings mortar overflows from the mixing overflow buffer barrel to the annular buffer space formed between the mixing overflow buffer barrel and the side wall of the box body, it also increases the potential energy to a certain extent, resulting in poor buffering effect. At the same time, the side wall of the mixing overflow buffer barrel is relatively high, the box body adopts a flat bottom plate and has a certain distance from the bottom of the discharge pipe, which are all prone to tailings sedimentation and caking. After the tailings mortar is repeatedly

[0008] scoured, it is extremely easy for the caked tailings blocks to fall off and block the discharge pipe. Summary of the Invention

[0009] The purpose of the present invention is to provide a tailings mortar collection, buffering and feeding device and method that can realize the collection and mixing of tailings mortar, pressure reduction and energy dissipation, enable the tailings mortar to be gently and smoothly fed to the tailings mortar concentration and storage facilities for filling, and at the same time avoid tailings sedimentation and pipe blockage.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] A tailings mortar collection, buffering and feeding device of the present invention is characterized in that it includes: a columnar box body with a top plate and a base, an inclined diversion plate fixed on the inner wall of the lower part of the columnar box body, a diversion buffer barrel fixed between the top plate of the columnar box body and the inclined diversion plate, a feed pipe passing through the outer wall of the columnar box body and tangentially communicated with the inner cavity of the diversion buffer barrel, a collection and mixing conical barrel fixed on the inner wall of the diversion buffer barrel, a grid screen arranged at the top of the collection and mixing conical barrel, and a discharge pipe arranged at the lower part of the side wall of the columnar box body; the upper opening diameter of the collection and mixing conical barrel is the same as the inner diameter of the diversion buffer barrel, and an annular buffer space is formed between the diversion buffer barrel and the inner wall of the columnar box body.

[0012] An open exhaust and pressure relief hole is arranged at the center position of the top plate of the columnar box body, which also serves as a maintenance manhole.

[0013] There are at least two feed pipes, and the feed pipes are arranged in parallel or at an angle to each other.

[0014] Arrayed resistance increasing and pressure reducing holes are evenly arranged on the lower peripheral wall of the diversion buffer barrel.

[0015] The lowest end of the inclined diversion plate is smoothly connected to the bottom of the discharge pipe, and the included angle between the inclined diversion plate and the columnar box

[0016] body base is α = 6° to 8°.

[0017] The central lines of the columnar box body, the diversion buffer barrel and the converging and mixing cone barrel are arranged to coincide with each other.

[0018] A method for collecting, buffering and feeding tailings slurry of the present invention is characterized in that: the tailings slurry from the concentrator enters the diversion buffer barrel in a tangential feeding manner through the feed pipe, forms a swirl along the inner wall of the diversion buffer barrel to achieve primary pressure reduction; then flows into the converging and mixing cone barrel after filtering out large waste residues through a grid screen, and after converging and mixing, flows through the arrayed resistance increasing and pressure reducing holes on the lower peripheral wall of the diversion buffer barrel into the annular buffer space between the columnar box body and the diversion buffer barrel to achieve secondary pressure reduction; finally, it flows out through the discharge pipe and is gently fed to the tailings slurry concentration and storage facility.

[0019] 1. Without changing the main performance parameters such as the total flow rate and mass concentration, the collection and mixing of the tailings slurry are realized, making the tailings slurry more stable and gentle, which is beneficial to subsequent treatment;

[0020] 2. It plays a role in pressure reduction and energy dissipation, greatly reducing the impact of the newly supplied tailings slurry on the existing tailings slurry in the tailings concentration and storage facility, making the feeding of the tailings slurry more stable and gentle;

[0021] 3. Significantly reduces the consumption of flocculant in the tailings concentration and storage facility, saving operating costs;

[0022] 4. Significantly improves the overflow water quality of the tailings concentration and storage facility, which is more beneficial to subsequent treatment;

[0023] 5. Arrayed resistance increasing and pressure reducing holes are evenly arranged on the lower peripheral wall of the diversion buffer barrel, and an inclined diversion plate with the lowest end connected to the bottom of the discharge pipe is arranged in the box body, effectively preventing the formation of dead material accumulation points and avoiding the deposition and hardening of tailings.

[0024] 4. Significantly improves the overflow water quality of the tailings concentration and storage facility, which is more beneficial to subsequent treatment;

[0025] 5. Arrayed resistance increasing and pressure reducing holes are evenly arranged on the lower peripheral wall of the diversion buffer barrel, and an inclined diversion plate with the lowest end connected to the bottom of the discharge pipe is arranged in the box body, effectively preventing the formation of dead material accumulation points and avoiding the deposition and hardening of tailings. Brief Description of the Drawings

[0026] Figure 1 It is a schematic top view of the structure of the present invention;

[0027] Figure 2 is Figure 1 the A-A sectional view of

[0028] In the figure, the serial numbers are: 1 - feed pipe, 2 - columnar box body, 3 - diversion buffer barrel, 4 - grid screen, 5 - collection and mixing cone barrel,

[0029] 6 - discharge pipe, 7 - inclined diversion plate, 21 - exhaust decompression hole, 31 - array resistance increasing and decompression hole. Specific implementation mode

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] As Figure 1 and Figure 2 shown, a tail mortar collection buffer feeding device of the present invention is characterized in that it includes: a columnar box body 2 with a top plate and a base, an inclined diversion plate 7 fixed on the inner wall of the lower part of the columnar box body 2, a diversion buffer barrel 3 fixed between the top plate of the columnar box body 2 and the inclined diversion plate 7, a feed pipe 1 passing through the outer wall of the columnar box body 2 and tangentially communicating with the inner cavity of the diversion buffer barrel 3, a collection and mixing cone barrel 5 fixed on the inner wall of the diversion buffer barrel 3,

[0032] a grid screen 4 arranged at the top of the collection and mixing cone barrel 5 and a discharge pipe 6 arranged at the lower part of the side wall of the columnar box body 2; the upper mouth diameter of the collection and mixing cone barrel 5 is the same as the inner diameter of the diversion buffer barrel 3, and an annular buffer space is formed between the diversion buffer barrel 3 and the inner wall of the columnar box body 2.

[0033] An open exhaust decompression hole 21 is arranged at the center position of the top plate of the columnar box body 2, and it also serves as a

[0034] manhole for maintenance.

[0035] There are three feed pipes 1, and the adjacent two feed pipes 1 are arranged at an angle of 90°, and the outlet centers of each feed

[0036] pipe 1 are located on the same concentric circle of the columnar box body 2.

[0037] Array resistance increasing and decompression holes 31 are uniformly arranged on the lower peripheral wall of the diversion buffer barrel 3.

[0038] The lowest end of the inclined diversion plate 7 is smoothly connected to the bottom of the discharge pipe 6, and the angle between the inclined diversion plate 7 and the base of the columnar

[0039] box body is α = 6° - 8°.

[0040] The center lines of the columnar box body 2, the diversion buffer barrel 3 and the collection and mixing cone barrel 5 are arranged to coincide with each other.

[0041] A method for collecting, buffering and feeding tailings slurry according to the present invention is characterized in that: the tailings slurry from the concentrator enters the diversion buffer barrel 3 in a tangential feeding manner through the feeding pipe 1, forms a swirling flow along the inner wall of the diversion buffer barrel 3 to achieve primary pressure reduction; then it flows into the collecting and mixing cone barrel 5 after filtering out large waste residues through the grid screen 4, and after collecting and mixing, it flows into the annular buffer space between the columnar box body 2 and the diversion buffer barrel 3 through the array of resistance-increasing and pressure-reducing holes 31 on the lower peripheral wall of the diversion buffer barrel 3 to achieve secondary pressure reduction; finally, it flows out through the discharge pipe and is gently fed to the tailings slurry

[0042] Concentration and storage facilities.

[0043] The present invention will be further described below in conjunction with embodiments. Embodiment

[0044] A certain iron ore mine uses the tailings of the concentrator for underground filling, and uses a Φ25m deep cone thickener for the concentration and storage of tailings slurry. The feeding is carried out by using the tailings slurry collecting, buffering and feeding device as shown in Figure 1 and Figure 2 . Among them, the number of feeding pipes 1 in the collecting and buffering device is three, the included angle between two adjacent feeding pipes 1 is 90°, and the inner diameter D1 of the feeding pipe 1 is 300 mm; the columnar box body 2 is cylindrical with an inner diameter D2 of 3000 mm and a height H1 of 3600 mm; the diversion buffer barrel 3 is cylindrical with an inner diameter D3 of 2000 mm, and an array of resistance-increasing and pressure-reducing holes 31 is uniformly arranged between the lower part 550 mm away from the base of the columnar box body 2 to the inclined diversion plate 7; a grid screen 4 is arranged at a height H2 = 2000 mm in the collecting and mixing cone barrel 5, and the size of the screen holes of the grid screen 4 is 5 mm × 5 mm; the cone angle β of the collecting and mixing cone barrel 5 is 60°, and the lower outlet diameter D4 is 450 mm; the inner diameter D5 of the discharge pipe 6 is 450 mm, and the bottom of the discharge pipe 6

[0045] The distance H4 from the base of the columnar box body 2 is 100 mm; the included angle α between the inclined diversion plate 7 and the base of the columnar box body is 6°.

[0046] The parameters of the tailings slurry are: the true specific gravity of the tailings is 2.83 t / m 3 , the total flow rate of the tailings slurry at the bottom of the concentrator of the concentrator is 890 m 3 / h (including 480 t of dry tailings), the mass concentration of the incoming tailings slurry is 40%, and it is transported by the slurry pump pumping method (the pipeline residual pressure is 0.16 MPa). A total of three transport pipelines are set, among which: two pipelines are working and one pipeline is in standby.

[0047] Please refer to Table 1 for the feeding index of the tailings slurry.

[0048]

[0049] Practice shows that after adopting the tailings slurry collecting buffer feeding device of the present invention, the collection and mixing of tailings slurry and pressure reduction and energy dissipation are realized, so that the tailings slurry is fed into the deep cone thickener smoothly and gently, and at the same time, the deposition of tailings and

[0050] pipe blockage are avoided. The tailings slurry collecting buffer feeding device of the present invention is applicable to various tailings slurry concentration and storage equipment, has strong applicability and good popularization prospects.

Claims

1. A tailings mortar collection buffer feeding device, characterized in that: Including: A columnar box body with a top plate and a base, an inclined flow guide plate fixed on the inner wall of the lower part of the columnar box body, a flow guide buffer barrel fixed between the top plate of the columnar box body and the inclined flow guide plate, a feed pipe passing through the outer wall of the columnar box body and tangentially communicating with the inner cavity of the flow guide buffer barrel, a converging and mixing cone barrel fixed on the inner wall of the flow guide buffer barrel, a grid screen arranged at the top of the converging and mixing cone barrel, and a discharge pipe arranged at the lower part of the side wall of the columnar box body; The upper opening diameter of the converging and mixing cone barrel is the same as the inner diameter of the flow guide buffer barrel, and an annular buffer space is formed between the flow guide buffer barrel and the inner wall of the columnar box body; Arrayed resistance increasing and pressure reducing holes are uniformly arranged on the circumferential wall of the lower part of the flow guide buffer barrel; The lowest end of the inclined flow guide plate is smoothly connected to the bottom of the discharge pipe, and the included angle between the inclined flow guide plate and the base of the columnar box body is α = 6° - 8°; The tailings slurry from the concentrator enters the flow guide buffer barrel in a tangential feeding manner through the feed pipe, forms a swirling flow along the inner wall of the flow guide buffer barrel to achieve primary pressure reduction; After passing through the grid screen to filter out large waste residues, it flows into the converging and mixing cone barrel, and after converging and mixing, it flows through the arrayed resistance increasing and pressure reducing holes on the circumferential wall of the lower part of the flow guide buffer barrel to the annular buffer space between the columnar box body and the flow guide buffer barrel to achieve secondary pressure reduction; Finally, it flows out through the discharge pipe and is gently fed to the tailings slurry concentration and storage facility.

2. The tailings mortar collecting buffer feeding device according to claim 1, wherein: An open exhaust and pressure reducing hole is arranged at the center position of the top plate of the columnar box body, which also serves as a maintenance manhole.

3. The tailings mortar collecting buffer feeding device according to claim 1, wherein: There are at least two feed pipes, and the feed pipes are arranged in parallel or at an angle to each other.

4. The tail mortar collection buffer feeding device according to claim 1, characterized in that: The center lines of the columnar box body, the flow guide buffer barrel, and the converging and mixing cone barrel are arranged to coincide with each other.

Images