A Nelson gravity separation box and configuration method thereof

Abstract

The present invention relates to a Nelson gravity separation box and a configuration method thereof, comprising a feed box body, a valve and a feed pipe, wherein the calculation formula of the effective volume of the feed box body is V=tQ / ρ; wherein, V is the effective volume of the ore box; t is time, when the ore powder throughput is less than or equal to 150 tons / hour, the time t is 10s, when the ore powder throughput is greater than 150 tons / hour, the time is 5s, Q is the ore powder throughput in the process; ρ is the ore powder density; the valve is installed on the discharge port of the feed box body, one end of the valve is connected to the discharge port, and the other end is connected to the feed pipe, and the end of the feed pipe away from the valve is inserted into the Nelson concentrator feed pipe to form a connection with the Nelson concentrator feed pipe. The invention calculates the effective volume of the Nelson concentrator and the relevant parameters of the ore feeding pipeline, and finally determines the installation height of the Nelson ore feeding box, thereby realizing the reasonable installation of the ore feeding box and the ore feeding pipe of the Nelson ore concentrator, and ensuring that the intermittent discharge type Nelson ore concentrator is stable when starting and stopping the feeding, and does not emit slurry.

Description

Technical Field

[0001] The invention belongs to the technical field of precious metal separation equipment, in particular to a Nelson gravity separation box and a configuration method thereof. Background Art

[0002] Nelson concentrator is an enhanced gravity concentrator based on the centrifugal principle. In a high-power enhanced gravity field, the separation between light and heavy minerals is easier than in a natural gravity field; this equipment has now become the preferred equipment for gravity separation in non-ferrous metal concentrators of gold and precious metals in the world.

[0003] The existing Nelson ore concentrator with intermittent discharge needs to stop for 1 to 3 minutes to discharge concentrate every 1 to 4 hours of operation, and slurry often appears on the top during startup and shutdown. This situation is not only related to the size and structure of the Nelson feed box, but also has a great impact on it due to the installation height difference and feed pipe slope during the production process. Therefore, the on-site configuration of the feed box in production is very important, otherwise it is very easy to cause slurry to continue to emerge from the top of the equipment for a short period of time after each feed valve is opened. Summary of the invention

[0004] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a Nelson ore concentrator ore box and its configuration method to solve the defects of instability and slurry bubbling of the Nelson ore concentrator when starting and stopping feeding.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A Nelson gravity separation box comprises a feed box body, a valve and a feed pipe.

[0007] The calculation formula of the effective volume of the feed box is V=tQ / ρ; wherein V is the effective volume of the feed box; t is time, when the mineral powder throughput is less than or equal to 150 tons / hour, the time t is 10s, when the mineral powder throughput is greater than 150 tons / hour, the time is 5s, Q is the mineral powder throughput in the process; ρ is the mineral powder density;

[0008] The valve is installed on the discharge port of the feed box body, one end of the valve is connected to the discharge port, and the other end is connected to the feed pipe. The end of the feed pipe away from the valve is inserted into the Nelson concentrator feed pipe to form a connection with the Nelson concentrator feed pipe.

[0009] Preferably, there is a gap between the feeding pipe and the Nelson concentrator feed pipe, the gap width is a, elbows are provided at the high and low ends of the feeding pipe, the middle part is inclined, and the end of the middle part of the feeding pipe close to the feeding box body is the high end, and the end close to the Nelson concentrator is the low end, the angle between the middle part of the feeding pipe and the horizontal plane is 3°, and the height of the elbows at the high and low ends of the feeding pipe is b.

[0010] Preferably, a support leg is provided on the feeding box body, the upper end of the support leg is connected to the feeding box body, and the lower end is connected to the mounting platform, and the ratio of the height of the support leg to the height of the mounting platform is 1:1.2-1.4.

[0011] Preferably, a bracket is provided on the ore feeding pipe, and the upper end of the bracket is connected to the ore feeding pipe.

[0012] Preferably, an overflow port is provided on the feeding box body, and the vertical height difference h between the overflow port and the discharge port is 500 mm.

[0013] A Nelson gravity separation box configuration method, the specific steps of the configuration method are as follows:

[0014] Step 1: According to the diameter d of the feed pipe of the Nelson concentrator and the gap width a, determine the diameter D of the feed pipe, where: D = d-2×a;

[0015] Step 2: According to the length L of the Nelson concentrator feed pipe, determine the insertion depth h of the feed pipe, where:

[0016] Step 3: According to the height of the Nelson concentrator n and the height of the elbows at the upper and lower ends of the feed pipe b, determine the rear end height of the feed pipe A = n + b, where b = 1.5D. According to the inclination angle of the middle of the feed pipe of 3° and the length K, calculate the front end height of the feed pipe B = A + K × sin3°;

[0017] Step 4: According to the front end height B of the feed pipe, the bending height b of the high and low ends, and the valve installation height c, calculate the discharge port height of the feed box H = B + b + c;

[0018] Step 5: Install the Nelson concentrator, the feed pipe, the valve, and the feed box in sequence according to the size data obtained in steps 1 to 4.

[0019] Preferably, the gap width is 12 mm.

[0020] Advantages and beneficial effects of the present invention:

[0021] The present invention calculates relevant parameters of the ore feeding pipeline and finally determines the installation height of the Nelson ore feeding box, thereby realizing reasonable installation configuration of the Nelson ore concentrator, the ore feeding pipe and the ore feeding box body, and ensuring that the intermittent discharge type Nelson ore concentrator is stable when starting and stopping feeding without slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Description of the accompanying drawings:

[0024] 1-feed box body, 2-valve, 3-feed pipe, 4-leg, 5-installation platform, 6-bracket, 7-discharge port, 8-Nelson concentrator, 9-overflow port. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is considered to be “disposed” or “connected” to another element, it may be directly disposed or connected to the other element or there may be an intermediate element at the same time.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification are only for describing specific implementation purposes and are not intended to limit the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, a Nelson gravity separation box includes a feed box body 1, a valve 2 and a feed pipe 3. The calculation formula of the effective volume of the feed box body 1 is V=tQ / ρ; wherein V is the effective volume of the ore box, t is the time, when the ore powder passing amount is less than or equal to 150 tons / hour, the time t is 10s, and when the ore powder passing amount is greater than 150 tons / hour, the time is 5s; Q is the ore powder passing amount in the process: ρ is the ore powder density;

[0030] The valve 2 is installed on the discharge port 7 of the feed box body 1, one end of the valve 2 is connected to the discharge port 7, and the other end is connected to one end of the feed pipe 3, and the end of the feed pipe 3 away from the discharge port 7 is inserted into the feed pipe of the Nelson concentrator 8 and connected to the feed pipe of the Nelson concentrator 8. The effective volume design of the feed box of the present invention is more reasonable, which solves the slurry problem of the Nelson concentrator 8. The effective volume design of the feed box body 1 of the present invention is more reasonable, which solves the slurry problem of the Nelson concentrator 8.

[0031] Example 2

[0032] On the basis of Example 1, Figure 1As shown, there is a gap between the feed pipe 3 and the feed pipe of the Nelson concentrator 8, the gap width is a, elbows are provided at the high and low ends of the feed pipe 3, the middle part is inclined, and the end of the middle part of the feed pipe 3 close to the feed box body 1 is the high end, and the end close to the Nelson concentrator 8 is the low end, the angle between the middle part of the feed pipe 3 and the horizontal plane is 3°, and the height of the elbows at the high and low ends of the feed pipe 3 is b. This embodiment reasonably determines the shape of the feed pipe and the installation inclination angle.

[0033] Example 3

[0034] On the basis of Example 1, Figure 1 As shown, a support leg 4 is provided on the feed box body 1, the upper end of the support leg 4 is connected to the feed box body 1, and the lower end is connected to the mounting platform 5, and the ratio of the height of the support leg 4 to the height of the mounting platform 5 is 1:1.2-1.4. The support leg 4 plays a role in supporting and stabilizing the feed box body 1, and the mounting platform 5 plays a role in maintaining a reasonable height between the feed box body 1 and the Nelson concentrator 8. If only the support leg 4 is provided, the support leg 4 will be too long, affecting the stability of the feed box body installation 1, so it is necessary to provide a mounting platform 5 to make the whole more stable.

[0035] Example 4

[0036] On the basis of Example 1, Figure 1 As shown, a bracket 6 is provided on the ore feeding pipe 3 and the bracket 6, and the upper end of the bracket 6 is connected to the ore feeding pipe 3. The bracket 6 plays a role of supporting and stabilizing the ore feeding pipe 3.

[0037] Example 5

[0038] On the basis of Example 1, Figure 1 As shown, an overflow port 9 is provided on the feed box body 1, and the vertical height difference h between the overflow port 9 and the discharge port 7 of the feed box body 1 is 500 mm. The function of the overflow port 9 is that when discharging ore, the Nelson concentrator 8 can no longer enter the slurry, so that the slurry flows back to the slurry pump pool.

[0039] Example 6

[0040] A Nelson gravity separation box configuration method, the specific steps are as follows:

[0041] Step 1: According to the diameter d of the feed pipe of the Nelson concentrator 8 and the gap width a, determine the diameter D of the feed pipe 3, where: D = d-2×a;

[0042] Step 2: Determine the insertion depth h of the feed pipe 3 according to the length L of the Nielsen beneficiation feed pipe, where:

[0043] Step 3: According to the height of the Nelson concentrator 8 n and the bending height of the upper and lower ends of the feed pipe 3 b, determine the rear end height of the feed pipe 3 A = n + b, where b = 1.5D, and according to the inclination angle of the middle part of the feed pipe 3 of 3° and the length K, calculate the front end height of the feed pipe 3 B = A + K × sin3°;

[0044] Step 4: According to the front end height B of the feed pipe 3, the height b of the elbows at both ends, and the installation height c of the valve 2, calculate the height H=B+b+c of the discharge port 7 of the feed box;

[0045] Step 5: Install the Nelson concentrator 8, the ore feeding pipe 3, the valve 2, and the ore box body 1 in sequence according to the size data obtained in steps 1 to 4;

[0046] The gap width a is 12 mm.

[0047] Among them, the diameter d, length L of the feed pipe of the Nelson concentrator 8, and the middle length K of the feed pipe 3 are known.

[0048] The present invention calculates the relevant parameters of the feed pipe 3 and finally determines the installation height of the feed box body 1, thereby realizing the reasonable installation of the Nelson concentrator 8, the feed pipe 3 and the feed box body 1, and ensuring that the Nelson concentrator 8 is stable when starting and stopping feeding without slurry.

Claims

1. A Nelson gravity separation box, comprising a feed box body (1), a valve (2) and a feed pipe (3), characterized in that: The calculation formula of the effective volume of the feed box (1) is V=tQ / ρ; wherein V is the effective volume of the feed box; t is time, when the mineral powder throughput is less than or equal to 150 tons / hour, the time t is 10 seconds, when the mineral powder throughput is greater than 150 tons / hour, the time is 5 seconds, Q is the mineral powder throughput in the process; ρ is the mineral powder density; The valve (2) is installed on the discharge port (7) of the feed box body (1), one end of the valve (2) is connected to the discharge port (7), and the other end is connected to the feed pipe (3), and the end of the feed pipe (3) away from the valve (2) is inserted into the feed pipe of the Nelson concentrator (8) to form a connection with the feed pipe of the Nelson concentrator (8); There is a gap between the feed pipe (3) and the feed pipe of the Nelson concentrator (8), the width of the gap is a, elbows are provided at the high and low ends of the feed pipe (3), the middle part is inclined, and the end of the middle part of the feed pipe (3) close to the feed box body (1) is the high end, and the end close to the Nelson concentrator (8) is the low end, the angle between the middle part of the feed pipe (3) and the horizontal plane is 3°, and the bending height of the high and low ends of the feed pipe (3) is b.

2. The Nelson gravity separation box according to claim 1, characterized in that: The feed box body (1) is provided with a support leg (4), the upper end of the support leg (4) is connected to the feed box body (1), and the lower end is connected to the mounting platform (5), and the ratio of the height of the support leg (4) to the height of the mounting platform (5) is 1:1.2-1.

4.

3. The Nelson gravity separation box according to claim 1, characterized in that: A bracket (6) is provided on the ore feeding pipe (3), and the upper end of the bracket (6) is connected to the ore feeding pipe (3).

4. The Nelson gravity separation box according to claim 1, characterized in that: The feeding box body (1) is provided with an overflow port (9), and the vertical height difference h between the overflow port (9) and the ore discharge port (7) is 500 mm.

5. A method for configuring a Nelson gravity separation box according to any one of claims 1 to 4, characterized in that: The specific steps of the configuration method are as follows: Step 1: According to the diameter d of the feed pipe of the Nelson concentrator (8) and the gap width a, determine the diameter D of the feed pipe (3), where: D = d-2×a; Step 2: Determine the insertion depth h of the feed pipe (3) according to the length L of the feed pipe of the Nelson concentrator (8), wherein: ; Step 3: According to the height of the Nelson concentrator (8) itself as n and the bending height of the upper and lower ends of the feed pipe (3) as b, determine the rear end height of the feed pipe (3) A = n + b, where b = 1.5D, according to the inclination angle of the middle of the feed pipe (3) as 3° and the length K, calculate the front end height of the feed pipe (3) B = A + K × sin3°: Step 4: Calculate the height H = B + b + c of the discharge port (7) of the feed box according to the front end height B of the feed pipe (3), the bending heights b of the upper and lower ends, and the installation height c of the valve (2); Step 5: Install the Nelson concentrator (8), the feed pipe (3), the valve (2), and the feed box body (1) in sequence according to the size data obtained in steps 1 to 4.

6. The configuration method according to claim 5, characterized in that: The gap width is 12 mm.

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