Flotation equipment

Abstract

The flotation equipment comprises a shell (1), a mixing device, a scraping and sweeping device (2) and a stirring device (3), an opening is formed in the upper portion of the shell, an overflow port (11) is formed in the upper portion of the front side wall of the shell, and a feeding port (12) is formed in the rear side wall of the shell. The upper end of the mixing barrel is closed, the lower end is open, and the upper end is fixedly connected with a supporting plate (14). And the feeding pipe is respectively communicated with the feeding hole and the mixing cylinder. One end of the air suction pipe is fixedly connected and internally communicated with the mixing barrel (41), and the other end extends above the shell. The air inlet fan is fixedly arranged on the outer side of the shell, and the air inlet pipe is communicated with the mixing barrel and an air outlet of the air inlet fan. The variable-frequency rotating device is fixedly arranged on the supporting plate, the upper end of the stirring shaft (32) is connected with the variable-frequency rotating device, the lower end of the stirring shaft (32) extends into the mixing barrel, stirring blades are arranged at the end, and the scraping and sweeping device (2) is arranged at an overflow opening of the shell. Sodium chloride in ore pulp can be effectively floated out, and loss of potassium chloride is prevented.

Description

Technical Field

[0001] The utility model relates to a flotation device, in particular to the structure of the flotation device. Background Art

[0002] Carnallite is a mineral formed by the crystallization of salt lake brine containing magnesium, potassium, sodium and other elements. It is one of the important raw materials for the production of potassium chloride. It is produced by drying salt lake brine in salt fields. The process of producing potassium chloride from carnallite includes the steps of crushing, slurry preparation, reverse flotation, low sodium concentration, solid-liquid separation, decomposition crystallization, selection, washing and drying.

[0003] Flotation equipment is required in the reverse flotation step. The working principle of the flotation equipment is to add flotation agents to the ore pulp in the flotation tank. When the flotation machine is running, the ore pulp is automatically inhaled with air under the stirring action of the stirring device, and bubbles are generated in the ore pulp. The particles (sodium chloride) in the ore pulp are selectively attached to the bubbles through the agent. After floating to the surface of the ore pulp with the bubbles, they are scraped out by the scraping device, and the remaining components (low-sodium carnallite) are retained in the ore pulp to achieve mineral separation.

[0004] The particle size of carnallite varies with the seasons. In summer, the evaporation rate of salt fields is fast, the drying time is short, and the growth time of carnallite crystals is short, resulting in a small overall particle size of carnallite. During reverse flotation, if the speed of the stirring device on the flotation equipment is high, the carnallite particles will be adsorbed on the bubbles and flow out of the system with the foam, resulting in a high content of potassium chloride in the foam. When flotating sodium chloride, potassium chloride will be lost. If the speed of the stirring device on the flotation equipment is low, the flotation equipment will have a small air intake, resulting in insufficient bubble foaming, and the sodium chloride cannot be effectively floated out. In winter, due to the high viscosity of the brine and the low activity of the reagent, the existing flotation equipment cannot form enough bubbles in the slurry and cannot effectively float out the sodium chloride.

[0005] However, the stirring devices on the existing flotation equipment are all operated at industrial frequency, and the speed cannot be adjusted. If the sodium chloride in the slurry cannot be effectively floated out, the impurity content in the slurry will be high, which will have a great impact on the downstream production system. Not only will it make the indicators and parameters of the downstream production process difficult to control, but it will also lead to a decline in the quality of potassium chloride products.

[0006] The utility model aims to solve the problem that the existing flotation equipment cannot adapt to the change of carnallite particle size, resulting in more impurities in the ore pulp after flotation and a large loss of potassium chloride. Utility Model Content

[0007] In order to solve the above problems, the utility model provides a flotation device, including a shell 1, a mixing device 4, a scraping device 2 and a stirring device 3. The upper part of the shell 1 is open, and a support plate 14 is arranged on the top. An overflow port 11 is formed on the upper part of the front side wall of the shell 1, and a feed port 12 is arranged on the lower part of the right side wall. A flotation chamber 13 is formed inside the shell 1. The mixing device 4 includes a mixing cylinder 41, a feed pipe 42, an air suction pipe 43, an air inlet fan 44 and an air inlet pipe 45. The mixing cylinder 41 is vertically arranged in the flotation chamber 13, the upper end is closed, the lower end is open, the upper end is fixedly connected to the support plate 14, and the lower end is spaced apart from the bottom plate of the shell 1.

[0008] One end of the feed pipe 42 is fixedly connected to the feed port 12, and the other end is fixedly connected to the mixing barrel 41, and the internals are connected. One end of the suction pipe 43 is fixedly connected to the top of the mixing barrel 41, and the internals are connected. The other end extends to the top of the shell 1. The air inlet fan 44 is fixedly arranged on the outside of the shell 1. One end of the air inlet pipe 45 is fixedly connected to the mixing barrel 41, and the internals are connected. The other end extends to the outside of the shell 1 through the side wall of the shell 1 and is connected to the air outlet of the air inlet fan 44. The stirring device 3 includes a frequency conversion rotating device and a stirring shaft 32, and the frequency conversion rotating device is fixedly arranged on the support plate 14. The upper end of the stirring shaft 32 is connected to the frequency conversion rotating device, and the lower end passes through the support plate 14 and extends into the mixing barrel 41. The end is provided with a stirring blade 33, and the scraping device 2 is arranged at the overflow port 11 of the shell 1.

[0009] When the utility model is used, ore pulp and flotation reagent are added from the feed port 12, the frequency conversion rotating device is turned on to control the stirring blades on the stirring shaft 32 to stir the ore pulp, and the speed of the frequency conversion rotating device is adjusted according to the particle size of the carnallite in the ore pulp. When the particle size of the carnallite in the ore pulp is large, the speed of the frequency conversion rotating device is set to be faster, and when the particle size of the carnallite in the ore pulp is small, the speed of the frequency conversion rotating device is set to be slower. And according to the amount of bubbles generated in the ore pulp, the air intake fan 44 is controlled to replenish air. When there are many bubbles generated in the ore pulp, the air intake fan 44 is turned off, and air is automatically sucked into the ore pulp through the suction pipe 43. When there are fewer bubbles generated in the ore pulp, the air intake fan 44 is turned on to replenish air and fill the ore pulp with air. The slurry is stirred by the stirring device 3 so that the slurry and the reagent are evenly mixed, bubbles are generated in the slurry, and the target particles in the slurry are attached to the bubbles by the reagent and float to the liquid surface, while other solid matter sinks to the bottom of the slurry, and the foam on the surface of the slurry is scraped out from the overflow port 11 by the scraping device 2.

[0010] The utility model is provided with a frequency conversion rotating device and a mixing device 4, and the rotation speed of the frequency conversion rotating device can be adjusted according to the particle size of the carnallites in the ore pulp, and the stirring speed of the stirring blades 33 on the ore pulp can be changed. When the particle size of the carnallites in the ore pulp is large, the rotation speed of the frequency conversion rotating device is set to be faster, and when the particle size of the carnallites in the ore pulp is small, the rotation speed of the frequency conversion rotating device is set to be slower, so as to prevent the carnallites from adhering to the foam and causing the loss of potassium chloride.

[0011] The mixing device 4 includes a mixing drum 41, a feeding pipe 42, an air intake pipe 43, an air inlet fan 44 and an air inlet pipe 45. The mixing drum 41 is sleeved on the outside of the stirring blade 33. The mixing drum 41 is connected with the air intake pipe 43 and the feeding pipe 42. By allowing the slurry, the reagent and the gas to enter the mixing drum 41 for mixing, the slurry and the reagent can be mixed more evenly in a smaller space, more bubbles can be generated in the slurry, and the flotation efficiency can be improved.

[0012] The air inlet fan 44 is connected to the mixing cylinder 41 through the air inlet pipe 45, and the air inlet fan 44 can be controlled to replenish air according to the amount of bubbles generated in the ore pulp. When there are many bubbles generated in the ore pulp, the air inlet fan 44 is turned off, and air is automatically sucked into the ore pulp through the suction pipe 43. When there are few bubbles generated in the ore pulp, the air inlet fan 44 is turned on to replenish air and fill the ore pulp with air, so that enough bubbles are generated in the ore pulp, and the sodium chloride in the ore pulp is effectively floated out. The utility model can solve the problem that the impurity content in the ore pulp after flotation of the existing flotation equipment is high and the flotation effect of sodium chloride is poor.

[0013] Preferably, the scraping device 2 includes a scraping shaft 21 and a scraping power device. The scraping shaft 21 is mounted on the overflow port 11 and extends in the left and right directions. Both ends are rotatably connected to the left and right side walls of the shell 1 respectively. A scraping plate 22 is provided on the scraping shaft 21. The scraping power device is arranged on the side wall of the shell 1 and is connected to the scraping shaft 21 for driving the scraping shaft 21 to rotate.

[0014] The scraping power device controls the rotation of the scraping shaft 21, and scrapes the foam on the surface of the ore slurry in the flotation chamber 13 through the scraping plate 22 on the scraping shaft 21, scrapes the foam from the overflow port 11, completes the reverse flotation, and realizes the mineral separation.

[0015] Preferably, a spoiler 15 is provided on the inner wall of the shell 1 . The spoiler 15 is rectangular and vertically arranged on a side of the inner wall of the shell 1 away from the feed port 12 .

[0016] By arranging the spoiler 15 on the inner wall of the shell 1, the ore pulp in the flotation chamber 13 can be blocked, the mixing of the ore pulp and the reagent is promoted, the generation of bubbles in the ore pulp is promoted, and the flotation efficiency is improved.

[0017] Preferably, the scraping power device is a scraping rotating motor 23, which is fixedly arranged on the right side wall of the shell 1. A driving wheel 24 is arranged on the rotating shaft of the scraping rotating motor 23. The right end of the scraping shaft 21 extends to the outside of the right side wall of the shell 1, and a driven wheel 25 is arranged at the end. The driving wheel 24 and the driven wheel 25 are connected by a chain 26.

[0018] Connecting the driving wheel 24 and the driven wheel 25 through the chain 26 can prevent the driving wheel 24 and the driven wheel 25 from slipping when rotating, thereby affecting the flotation operation.

[0019] Preferably, the two ends of the scraping shaft 21 are rotatably connected to the left and right side walls of the overflow port 11 through bearings. The two ends of the scraping shaft 21 are rotatably connected to the left and right side walls of the housing 1 through bearings, which can reduce friction and improve rotation efficiency.

[0020] Preferably, the variable frequency rotating device is a variable frequency motor 31 .

[0021] Preferably, a discharge port 16 is provided at the bottom of the side wall of the housing 1 , and a discharge valve 161 is provided on the discharge port 16 . BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 .Schematic diagram of the overall structure of the flotation equipment;

[0023] Figure 2 . Figure 1 The enlarged schematic diagram at A in the middle;

[0024] Figure 3 . Figure 1 Schematic diagram of the structure of the middle BB section;

[0025] Figure 4 . Figure 3 Schematic diagram of the CC cross-section structure.

[0026] In the figure, 1. shell, 11. overflow port, 12. feed port, 121. feeding valve, 13. flotation chamber, 14. support plate, 15. spoiler, 16. discharge port, 161. discharge valve, 2. scraping device, 21. scraping shaft, 22. scraping plate, 23. scraping rotating motor, 24. driving wheel, 25. driven wheel, 26. chain, 3. stirring device, 31. frequency conversion motor, 32. stirring shaft, 33. stirring blade, 4. mixing device, 41. mixing barrel, 42. feed pipe, 43. suction pipe, 44. air inlet fan, 45. air inlet pipe, 451. air inlet valve. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, the flotation device includes a shell 1, a mixing device 4, a scraping device 2 and a stirring device 3. The shell 1 has an opening at the top and a support plate 14 is arranged on the top. An overflow port 11 is formed at the upper part of the front side wall of the shell 1, a feed port 12 is arranged at the lower part of the right side wall, a discharge port 16 is arranged at the bottom of the left side wall of the shell 1, and a flotation chamber 13 is formed inside the shell 1.

[0029] The feed port 12 is provided with a feed valve 121 , and the discharge port 16 is provided with a discharge valve 161 .

[0030] The scraping device 2 includes a scraping shaft 21 and a scraping power device. The scraping shaft 21 is mounted on the overflow port 11 and extends in the left and right directions. Both ends are rotatably connected to the left and right side walls of the housing 1 through bearings respectively. A scraping plate 22 is provided on the scraping shaft 21.

[0031] The scraping power device is a scraping rotating motor 23, which is arranged on the right side wall of the shell 1. The scraping rotating motor 23 is fixedly arranged on the right side wall of the shell 1. A driving wheel 24 is arranged on the rotating shaft of the scraping rotating motor 23. The right end of the scraping shaft 21 extends to the outside of the right side wall of the shell 1, and a driven wheel 25 is arranged at the end. The driving wheel 24 and the driven wheel 25 are connected by a chain 26.

[0032] Connecting the driving wheel 24 and the driven wheel 25 through the chain 26 can prevent the driving wheel 24 and the driven wheel 25 from slipping when rotating, thereby affecting the flotation operation. The two ends of the scraping shaft 21 are respectively connected to the left and right side walls of the housing 1 through bearings to reduce friction and improve rotation efficiency.

[0033] The sweeping rotation motor controls the sweeping shaft 21 to rotate, and the sweeping plate 22 on the sweeping shaft 21 is used to sweep the foam on the surface of the slurry in the flotation chamber 13, and the foam is scraped out from the overflow port 11, thereby completing reverse flotation and realizing mineral separation.

[0034] like Figure 3 and Figure 4 As shown, the mixing device 4 includes a mixing cylinder 41, a feed pipe 42, an air intake pipe 43, an air inlet fan 44 and an air inlet pipe 45. The mixing cylinder 41 is vertically arranged in the flotation chamber 13, with a closed upper end and an open lower end. The upper end is fixedly connected to the support plate 14, and the lower end maintains a distance from the bottom plate of the shell 1.

[0035] One end of the feed pipe 42 is fixedly connected to the feed port 12 , and the other end is fixedly connected to the mixing barrel 41 , and the interiors are communicated.

[0036] One end of the air intake pipe 43 is fixedly connected to the top of the mixing cylinder 41 and communicates with the inside thereof, and the other end of the air intake pipe 43 extends to the top of the shell 1 .

[0037] The air inlet fan 44 is fixedly arranged outside the shell 1 , one end of the air inlet pipe 45 is fixedly connected to the mixing cylinder 41 and communicated with the inside, and the other end extends through the side wall of the shell 1 to the outside of the shell 1 and communicates with the air outlet of the air inlet fan 44 .

[0038] The mixing device 4 includes a mixing drum 41, a feeding pipe 42, an air intake pipe 43, an air inlet fan 44 and an air inlet pipe 45. The mixing drum 41 is sleeved on the outside of the stirring blade 33. The mixing drum 41 is connected with the air intake pipe 43 and the feeding pipe 42. By allowing the slurry, the reagent and the gas to enter the mixing drum 41 for mixing, the slurry and the reagent can be mixed more evenly in a smaller space, more bubbles can be generated in the slurry, and the flotation efficiency can be improved.

[0039] An air inlet 44 is arranged on the outer wall of the housing 1, and the air outlet of the air inlet 44 is connected to the mixing cylinder 41 through the air inlet pipe 45. The air inlet 44 can be controlled to supply air according to the amount of bubbles generated in the ore pulp. When there are many bubbles generated in the ore pulp, the air inlet 44 is turned off, and air is automatically sucked into the ore pulp through the suction pipe 43. When there are few bubbles generated in the ore pulp, the air inlet 44 is turned on to supply air and fill the ore pulp with air. Thereby, sufficient bubbles are generated in the ore pulp, and the sodium chloride in the ore pulp is effectively floated out.

[0040] The stirring device 3 includes a variable frequency rotating device and a stirring shaft 32 . The variable frequency rotating device is a variable frequency motor 31 . The variable frequency motor 31 is fixedly disposed on the support plate 14 .

[0041] The upper end of the stirring shaft 32 is fixedly connected to the rotating shaft of the variable frequency motor 31 , and the lower end passes through the support plate 14 and extends into the mixing barrel 41 . The end is provided with a stirring blade 33 , and the scraping device 2 is provided at the overflow port 11 of the housing 1 .

[0042] The variable frequency motor 31 can be set to adjust the rotation speed of the variable frequency motor 31 according to the particle size of the carnallite in the slurry, and change the stirring speed of the slurry by the stirring blade 33. When the particle size of the carnallite in the slurry is large, the rotation speed of the variable frequency motor 31 is set to be faster. When the particle size of the carnallite in the slurry is small, the rotation speed of the variable frequency motor 31 is set to be slower, so as to prevent the carnallite particles from adhering to the foam and causing the loss of potassium chloride.

[0043] like Figure 3 and Figure 4 As shown, a spoiler 15 is arranged on the inner wall of the shell 1 . The spoiler 15 is rectangular and is vertically arranged on a side of the inner wall of the shell 1 away from the feed port 12 .

[0044] A spoiler 15 is arranged on the inner wall of the shell 1 to block the slurry in the flotation chamber 13, promote the mixing of the slurry and the reagent, promote the generation of bubbles in the slurry, and improve the flotation efficiency.

[0045] When the utility model is used, ore pulp and flotation reagent are added from the feed port 12, the variable frequency motor 31 is turned on to control the stirring blades on the stirring shaft 32 to stir the ore pulp, and the speed of the variable frequency motor 31 is adjusted according to the particle size of the carnallite in the ore pulp. When the particle size of the carnallite in the ore pulp is large, the speed of the variable frequency motor 31 is set to be faster, and when the particle size of the carnallite in the ore pulp is small, the speed of the variable frequency motor 31 is set to be slower. And according to the amount of bubbles generated in the ore pulp, the air intake fan 44 is controlled to replenish air. When there are many bubbles generated in the ore pulp, the air intake fan 44 is turned off, and air is automatically sucked into the ore pulp through the suction pipe 43. When there are fewer bubbles generated in the ore pulp, the air intake fan 44 is turned on to replenish air and fill the ore pulp with air.

[0046] The utility model is provided with a variable frequency motor 31 and a mixing device 4, and the rotation speed of the variable frequency motor 31 can be adjusted according to the particle size of the carnallites in the ore pulp, and the stirring speed of the stirring blades 33 on the ore pulp can be changed. When the particle size of the carnallites in the ore pulp is large, the rotation speed of the variable frequency motor 31 is set to be faster, and when the particle size of the carnallites in the ore pulp is small, the rotation speed of the variable frequency motor 31 is set to be slower, so as to prevent the carnallites from adhering to the foam and causing the loss of potassium chloride.

[0047] The mixing device 4 includes a mixing drum 41, a feeding pipe 42, an air intake pipe 43, an air inlet fan 44 and an air inlet pipe 45. The mixing drum 41 is sleeved on the outside of the stirring blade 33. The mixing drum 41 is connected with the air intake pipe 43 and the feeding pipe 42. By allowing the slurry, the reagent and the gas to enter the mixing drum 41 for mixing, the slurry and the reagent can be mixed more evenly in a smaller space, more bubbles can be generated in the slurry, and the flotation efficiency can be improved.

[0048] The air inlet fan 44 is connected to the mixing cylinder 41 through the air inlet pipe 45, and the air inlet fan 44 can be controlled to replenish air according to the amount of bubbles generated in the ore pulp. When there are many bubbles generated in the ore pulp, the air inlet fan 44 is turned off, and air is automatically sucked into the ore pulp through the suction pipe 43. When there are few bubbles generated in the ore pulp, the air inlet fan 44 is turned on to replenish air and fill the ore pulp with air, so that enough bubbles are generated in the ore pulp, and the sodium chloride in the ore pulp is effectively floated out. The utility model can solve the problem that the impurity content in the ore pulp after flotation of the existing flotation equipment is high and the flotation effect of sodium chloride is poor.

[0049] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A flotation device, characterized in that: It comprises a housing (1), a mixing device (4), a scraping device (2) and a stirring device (3), The shell (1) is open at the top, a support plate (14) is arranged at the top, an overflow port (11) is formed at the upper part of the front side wall of the shell (1), a feed port (12) is arranged at the lower part of the right side wall, and a flotation chamber (13) is formed inside the shell (1); The mixing device (4) comprises a mixing cylinder (41), a feed pipe (42), an air intake pipe (43), an air inlet fan (44) and an air inlet pipe (45). The mixing cylinder (41) is vertically arranged in the flotation chamber (13), with a closed upper end and an open lower end, the upper end being fixedly connected to the support plate (14), and the lower end being spaced apart from the bottom plate of the housing (1); One end of the feed pipe (42) is fixedly connected to the feed port (12), and the other end is fixedly connected to the mixing cylinder (41), and the interiors are communicated; One end of the air intake pipe (43) is fixedly connected to the top of the mixing cylinder (41) and is internally connected, and the other end extends to the top of the shell (1); The air inlet fan (44) is fixedly arranged on the outside of the housing (1); One end of the air inlet pipe (45) is fixedly connected to the mixing cylinder (41) and is communicated with the interior thereof, and the other end thereof passes through the side wall of the shell (1) and extends to the outside of the shell (1) and is communicated with the air outlet of the air inlet fan (44); The stirring device (3) comprises a frequency conversion rotating device and a stirring shaft (32). The variable frequency rotating device is fixedly arranged on the supporting plate (14); The upper end of the stirring shaft (32) is connected to the frequency conversion rotating device, and the lower end passes through the support plate (14) and extends into the mixing barrel (41), and a stirring blade (33) is provided at the end; The scraping device (2) is arranged at the overflow port (11) of the housing (1).

2. The flotation device according to claim 1, characterized in that: The scraping device (2) comprises a scraping shaft (21) and a scraping power device. The scraping shaft (21) is mounted on the overflow port (11), extending in the left-right direction, and its two ends are rotatably connected to the left and right side walls of the shell (1) respectively, and a scraping plate (22) is provided on the scraping shaft (21); The scraping power device is arranged on the side wall of the housing (1), connected to the scraping shaft (21), and is used to drive the scraping shaft (21) to rotate.

3. The flotation device according to claim 2, characterized in that: A spoiler (15) is provided on the inner wall of the housing (1). The spoiler (15) is rectangular and is vertically arranged on a side of the inner wall of the shell (1) away from the feed port (12).

4. The flotation device according to claim 3, characterized in that: The scraping power device is a scraping rotating motor (23), The scraping and sweeping rotating motor (23) is fixedly arranged on the right side wall of the housing (1), and a driving wheel (24) is arranged on the rotating shaft of the scraping and sweeping rotating motor (23); The right end of the scraping shaft (21) extends to the outside of the right side wall of the housing (1), and a driven wheel (25) is provided at the end; The driving wheel (24) and the driven wheel (25) are connected via a chain (26).

5. The flotation device according to claim 4, characterized in that: The two ends of the scraping shaft (21) are rotatably connected to the left and right side walls of the overflow port (11) via bearings respectively.

6. The flotation device according to claim 5, characterized in that The variable frequency rotating device is a variable frequency motor (31).

7. The flotation device according to any one of claims 1 to 6, characterized in that: The bottom of the side wall of the shell (1) is provided with a discharge port (16); The discharge port (16) is provided with a discharge valve (161).

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