A mineral flotation process

Abstract

The invention provides a mineral flotation process, which relates to the technical field of mineral flotation, and comprises the following steps: pre-treating a bubble mechanism; opening a feed pump to allow slurry to enter a feed pipe, controlling the bubble mechanism and a collector dosing mechanism to start working, so that the bubble agent, the collector and the slurry are mixed in the feed pipe to form flotation slurry; feeding the flotation slurry into the flotation mechanism, and collecting the floated concentrate by overflow; low-ash coarse particles of the flotation tailings are discharged through a second discharge pipe and enter a secondary flotation operation, and high-ash fine particles of the flotation tailings are overflowed through an overflow weir and enter a concentration operation; controlling the feed pump, the bubble mechanism and the collector dosing mechanism to stop working; residual tailings in the flotation mechanism are discharged through a first discharge pipe and enter a secondary flotation operation; the anti-blocking slurry adjusting mechanism is arranged, so that after the feed pipe stops conveying the slurry, the slurry remaining in the anti-blocking slurry adjusting mechanism can be avoided, thereby avoiding the occurrence of blockage in the anti-blocking slurry adjusting mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of mineral flotation, in particular to a mineral flotation process. Background Art

[0002] Froth flotation is a well-known method for separating finely crushed materials from a slurry or suspension of minerals in water. The particles to be recovered from the slurry may be treated with a chemical agent (collector) to render them hydrophobic, and a gas, usually air, may be mixed or sprayed into the slurry in the form of bubbles which contact the hydrophobic particles and carry them to the surface of the slurry to form a stable layer of froth. The froth containing the floated particles is recovered as an enrichment or flotation product, while various hydrophilic materials are retained and sink into the slurry and are then discharged or subjected to secondary flotation;

[0003] Reference 202010228150.3-An improved flotation system and flotation process for difficult-to-select minerals, which discloses that the slurry mixing module includes a module body fixedly arranged in a feed transport pipe, the module body adopts a column structure that is completely fitted with the inner wall of the feed transport pipe, and the module body is provided with a plurality of evenly spaced through holes for slurry circulation, the center lines of the plurality of through holes are parallel to the central axis of the feed transport pipe, and the cross-sectional shape of the plurality of through holes adopts a circle of equal area. Through such an arrangement, when the slurry and the collector are mixed and flow into the slurry mixing module, the slurry mixing module shrinks the flow cross-section of the slurry, increases the shear force of the slurry, and thereby achieves the effect of self-stirring, so as to achieve sufficient mixing of the slurry and the collector. However, after the feed transport pipe stops transporting the slurry, the slurry remaining in the through hole is easy to solidify and cause the through hole to be blocked, and since the slurry mixing module is arranged in the feed transport pipe, it is difficult to disassemble it and clear the through hole, thereby affecting the fluidity of the slurry in the slurry mixing module. Summary of the invention

[0004] The present invention provides a mineral flotation process to solve the above-mentioned technical problems that after the feed transport pipe stops transporting the ore pulp, the ore pulp remaining in the through hole is easy to solidify and cause the through hole to be blocked, and because the slurry mixing module is arranged in the feed transport pipe, it is difficult to disassemble it and dredge the through hole, thereby affecting the fluidity of the slurry in the slurry mixing module.

[0005] In order to solve the above technical problems, the present invention discloses a mineral flotation process, comprising the following steps:

[0006] Step 1: Pre-treat the bubble mechanism;

[0007] Step 2: Turn on the feeding pump to allow the slurry to enter the feeding pipe, and at the same time control the bubble mechanism and the collector dosing mechanism to start working, so that the collector and the bubble agent enter the feeding pipe. The slurry is first mixed with the collector and enters the anti-blocking slurry mixing mechanism for full mixing. The mixture of the collector and the slurry is sprayed into the feeding pipe through the nozzle and mixed with the bubble agent to form a flotation slurry;

[0008] Step 3: The flotation slurry in the feeding pipe is sent to the flotation mechanism, and the flotation concentrate is overflowed and collected;

[0009] Step 4: The coarse particles of the flotation tailings with low ash content are discharged through the discharge pipe 2 and enter the secondary flotation operation, and the fine particles of the flotation tailings with high ash content overflow through the overflow weir and enter the concentration operation;

[0010] Step 5: Control the feeding pump, the bubble mechanism and the collector dosing mechanism to stop working;

[0011] Step 6: The remaining tailings in the flotation mechanism are discharged through the discharge pipe 1 and enter the secondary flotation operation;

[0012] Step 7: After the slurry stops being transported in the feed pipe, the anti-blocking slurry adjusting mechanism is controlled to continue working to avoid residual slurry in the anti-blocking slurry adjusting mechanism.

[0013] Preferably, the feed inlet of the feed pipe is connected to the feed pump, an anti-blocking slurry adjusting mechanism and a nozzle are installed on the feed pipe, the nozzle is arranged on the side of the anti-blocking slurry adjusting mechanism away from the feed pump, and the discharge port of the feed pipe is connected to the flotation mechanism.

[0014] Preferably, a conveying pipe 1 is connected and installed on the collector dosing mechanism, a conveying pipe 2 is connected and installed on the bubble mechanism, both conveying pipe 1 and conveying pipe 2 are connected to the feed pipe, and valve 1 is installed on both conveying pipe 1 and conveying pipe 2.

[0015] Preferably, the anti-blocking slurry adjusting mechanism includes a fixed shell, which is threadedly connected to the feed pipe by a plurality of bolts, and mounting holes are penetrated at the left and right ends of the middle part of the fixed shell, and the mounting holes are connected with the internal tube holes of the feed pipe, and a rotating wheel is rotatably arranged in the mounting hole, and a plurality of mixing holes are arranged in a circumferential array inside the rotating wheel, and the mixing holes are penetrated along the left and right ends of the rotating wheel, and a through hole is connected between adjacent mixing holes, and the mixing holes are connected with the internal tube holes of the feed pipe.

[0016] Preferably, a working hole is provided in the middle of the upper end of the fixed shell 1, the working hole is connected to the mounting hole, the ring gear in the working hole is fixedly connected to the rotating wheel, the ring gear is meshed with gear 1, gear 1 is fixedly connected to the motor through the drive shaft, and the motor is threadedly connected to the upper end of the feed pipe through a plurality of bolts 2.

[0017] Preferably, the anti-blocking slurry adjusting mechanism also includes a fixed sleeve, which is rotatably connected to the rotating wheel, and the fixed sleeve is fixedly connected to the side end of the working hole. A through hole 2 and an air inlet hole are provided on the upper side of the fixed sleeve, and the through hole 2 is connected to the air inlet hole, and the air inlet hole is connected to the working hole. A plurality of through holes 3 are evenly distributed on the outer circumference of the rotating wheel, and the plurality of through holes 3 are connected one-to-one with the plurality of mixing holes in the outermost circle, and the through holes 2 and the through holes 3 are connected correspondingly. A guide plate is rotatably installed in the through hole 2, and a fixed shell 2 is fixedly provided on the upper end of the fixed sleeve, and a sealing cavity is provided inside the fixed shell 2, and the sealing cavity is connected with the through hole 2, and a sealing plate is slidably provided in the sealing cavity, and the sealing plate is fixedly connected to the fixed rod, and the fixed rod passes through the sealing cavity and is fixedly connected to the contact plate on the outside at one end away from the fixed sleeve, and a spring is fixedly provided between the contact plate and the fixed shell 2, and the spring sleeve is arranged on the fixed rod, and the contact plate contacts with the cam correspondingly, and the cam is fixedly connected to the driving shaft.

[0018] Preferably, the flotation mechanism includes a working shell, a flotation chamber is provided inside the working shell, the inlet of the flotation chamber is connected with the discharge port of the feed pipe, the left outlet one at the lower end of the flotation chamber is connected with the discharge pipe one, the right outlet two at the lower end of the flotation chamber is connected with the discharge pipe two, a guide block is fixedly provided in the middle of the lower end of the flotation chamber, a limit block is fixedly provided at the right end of the flotation chamber, a flow path is provided between the limit block, the guide block and the right end of the flotation chamber, the flow path is connected with the flotation chamber, a rectifier module is fixedly provided in the flow path, an outlet three is provided on the lower side of the right end of the working shell, the flow path is connected with the overflow weir through the outlet three, and the overflow weir is fixedly installed on the lower side of the right end of the working shell.

[0019] Preferably, an outlet four is provided on the upper right end of the working shell, and the flotation chamber is connected with the collecting chamber in the collecting shell through the outlet four. The outer shell of the collecting shell is slidably connected to the upper right end of the working shell, and a liquid outlet is provided at the right end of the outer shell of the collecting shell. A rotating shaft is symmetrically provided on the front and rear sides of the lower end of the outer shell of the collecting shell, and the rotating shaft is fixedly connected to the bottom cover of the collecting shell. A conveying device is correspondingly provided in the middle part of the right end of the working shell, and the conveying device is correspondingly arranged on the lower side of the collecting shell.

[0020] Preferably, it also includes an automatic discharging mechanism, which includes electric telescopic rods symmetrically arranged at the front and rear ends of the working shell, the fixed end of the electric telescopic rod is fixedly connected to the working shell, the movable end of the electric telescopic rod 39 is rotatably connected to the rotating shaft, the rotating shaft passes through the end of the collecting shell away from the working shell and is fixedly connected to gear 2, gear 2 is meshed with the rack, the rack is fixedly connected to the working shell, a weighing sensor is installed at the connection between the electric telescopic rod and the rotating shaft, and the weighing sensor is electrically connected to the electric telescopic rod through a controller.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The setting of the anti-blocking slurry adjusting mechanism can prevent the slurry from remaining in the anti-blocking slurry adjusting mechanism after the feeding pipe stops conveying the slurry, thereby avoiding the occurrence of blockage in the anti-blocking slurry adjusting mechanism.

[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the process flow of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the present invention;

[0027] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of region A;

[0029] Figure 5 It is a schematic diagram of the rotating wheel structure of the present invention.

[0030] In the figure: 1, feed pipe; 2, feed pump; 3, collector dosing mechanism; 4, delivery pipe 1; 5, fixed shell 1; 6, motor; 7, bubble mechanism; 8, delivery pipe 2; 9, working shell; 10, flotation chamber; 11, outlet 4; 12, collection chamber; 13, collection shell; 14, liquid outlet; 15, limit block; 16, rectifier module; 17, guide block; 18, flow path; 19, discharge pipe 1; 20, discharge pipe 2; 21, drive shaft; 22. Gear 1; 23. Overflow weir; 24. Cam; 25. Contact plate; 26. Fixed rod; 27. Fixed shell 2; 28. Fixed sleeve; 29. ​​Through hole 2; 30. Through hole 3; 31. Mixing hole; 32. Through hole 1; 33. Rotating wheel; 34. Gear ring; 35. Sealing chamber; 36. Sealing plate; 37. Working hole; 38. Bottom cover; 39. Electric telescopic rod; 40. Gear 2; 41. Rack; 42. Nozzle; 43. Air inlet. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides the following embodiments

[0034] Example 1

[0035] The embodiment of the present invention provides a mineral flotation process, such as Figure 1-Figure 3 As shown, the following steps are included:

[0036] Step 1: pre-treating the bubble mechanism 7;

[0037] Step 2: Turn on the feed pump 2 to allow the slurry to enter the feed pipe 1, and at the same time control the bubble mechanism 7 and the collector dosing mechanism 3 to start working, so that the collector and the bubble agent enter the feed pipe 1, the slurry is first mixed with the collector and enters the anti-blocking slurry mixing mechanism for full mixing, and the mixture of the collector and the slurry is sprayed into the feed pipe 1 through the nozzle 42 and mixed with the bubble agent to form a flotation slurry;

[0038] Step 3: feeding the flotation pulp in the feeding pipe 1 into the flotation mechanism, and collecting the flotation concentrate by overflow;

[0039] Step 4: The coarse particles of the flotation tailings with low ash content are discharged through the discharge pipe 20 and enter the secondary flotation operation, and the fine particles of the flotation tailings with high ash content overflow through the overflow weir 23 and enter the concentration operation;

[0040] Step 5: Control the feeding pump 2, the bubble mechanism 7 and the collector dosing mechanism 3 to stop working;

[0041] Step 6: The remaining tailings in the flotation mechanism are discharged through the discharge pipe 19 and enter the secondary flotation operation;

[0042] Step 7: After the slurry stops being transported in the feed pipe 1, the anti-blocking slurry adjusting mechanism is controlled to continue working to avoid residual slurry in the anti-blocking slurry adjusting mechanism.

[0043] The feed inlet of the feed pipe 1 is connected to the feed pump 2. The feed pipe 1 is provided with an anti-blocking slurry adjustment mechanism and a nozzle 42. The nozzle 42 is arranged on the side of the anti-blocking slurry adjustment mechanism away from the feed pump 2. The discharge port of the feed pipe 1 is connected to the flotation mechanism.

[0044] The collector dosing mechanism 3 is connected to a delivery pipe 4, the bubble mechanism 7 is connected to a delivery pipe 2 8, both delivery pipe 1 4 and delivery pipe 2 8 are connected to the feed pipe 1, and both delivery pipe 1 4 and delivery pipe 2 8 are equipped with a valve 1, delivery pipe 1 4 is arranged on a side of the feed pipe 1 close to the feed pump 2, and delivery pipe 2 8 is arranged on a side of the feed pipe 1 close to the flotation mechanism.

[0045] The beneficial effects of the above technical solution are:

[0046] Reference 202010228150.3 - An improved flotation system and flotation process for refractory minerals, the bubble mechanism 7 includes a heating device and a bubble agent gasification box, and the specific steps of pre-treating the bubble mechanism 7 in step 1 are to heat and gasify the bubble agent in the bubble agent gasification box by the heating device, and to feed the slurry into the feed pipe 1 by the feed pump 2, and to open the valves 1 on the feed pipe 1 4 and the feed pipe 2 8, and the collector dosing mechanism 3 adds the target amount of collector into the feed pipe 1 through the feed pipe 1 4 The ore pulp and the collector enter the anti-blocking slurry mixing mechanism to achieve full mixing of the ore pulp and the collector. The mixed ore pulp and the collector enter the nozzle 42 to form a jet, and a low pressure is formed at the nozzle of the nozzle 42. The gaseous bubbling agent and air formed by heating by the heating device enter the feeding pipe 1 through the conveying pipe 28. Under the low-pressure environment of the nozzle 42, the bubbling agent and air are mixed and sucked into the ore pulp, and dissolved in the ore pulp to form fine bubbles (the concentrate is adsorbed on the surface of the bubble), forming a flotation ore pulp and finally entering the flotation machine. After the flotation, the bubbles dissolved in the slurry are separated to form stable bubbles and float up to overflow for collection. The tailings cannot float up and are classified in the flotation mechanism. The low-ash coarse-grained minerals are discharged through the discharge pipe 20, and the high-ash fine-grained minerals pass through the rectification module 16 and overflow into the overflow weir 23 with the rising water flow. The remaining tailings are discharged through the discharge pipe 19, thus realizing the mineral flotation step. The discharge pipe 20 and the discharge pipe 19 are both equipped with valves 2. When the material is discharged through the discharge pipe 20 or the discharge pipe 19, the tailings are discharged through the discharge pipe 20 or the discharge pipe 19. When the slurry is stopped, the valve 2 installed correspondingly can be opened. The setting of the anti-blocking slurry adjusting mechanism can avoid the residual slurry in the anti-blocking slurry adjusting mechanism after the feeding pipe 1 stops conveying the slurry, thereby avoiding the occurrence of blockage in the anti-blocking slurry adjusting mechanism. It solves the technical problem that after the feeding transport pipe stops conveying the slurry, the residual slurry in the through hole is easy to solidify and cause the through hole to be blocked, and since the slurry adjusting module is arranged in the feeding transport pipe, it is difficult to disassemble it and dredge the through hole, thereby affecting the fluidity of the slurry in the slurry adjusting module.

[0047] Example 2

[0048] On the basis of Example 1, Figure 2-Figure 5 As shown, the anti-blocking slurry mixing mechanism includes a fixed shell 5, which is threadedly connected to the feed pipe 1 through a plurality of bolts, and mounting holes are provided at both left and right ends of the middle part of the fixed shell 5, and the mounting holes are communicated with the internal tube holes of the feed pipe 1, and a rotating wheel 33 is rotatably provided in the mounting hole, and a plurality of mixing holes 31 are arranged in a circumferential array inside the rotating wheel 33, and the mixing holes 31 are penetrated along the left and right ends of the rotating wheel 33, and a through hole 32 is connected between adjacent mixing holes 31, and the mixing holes 31 are communicated with the internal tube holes of the feed pipe 1;

[0049] A working hole 37 is provided in the middle of the upper end of the fixed shell 1 5, the working hole 37 is communicated with the mounting hole, the ring gear 34 in the working hole 37 is fixedly connected with the rotating wheel 33, the ring gear 34 is meshed with the gear 1 22, the gear 1 22 is fixedly connected with the motor 6 through the driving shaft 21, and the motor 6 is threadedly connected to the upper end of the conveying pipe 1 through a plurality of bolts 2;

[0050] The anti-blocking slurry mixing mechanism also includes a fixed sleeve 28, which is rotatably connected to the rotating wheel 33, and the fixed sleeve 28 is fixedly connected to the side end of the working hole 37. A through hole 29 and an air inlet hole 43 are provided on the upper side of the fixed sleeve 28, and the through hole 29 and the air inlet hole 43 are connected, and the air inlet hole 43 is connected with the working hole 37. A plurality of through holes 30 are evenly arranged on the outer circumference of the rotating wheel 33, and the plurality of through holes 30 are connected with the plurality of mixing holes 31 in the outermost circle in a one-to-one correspondence. The fixed sleeve 28 is correspondingly arranged with the through hole 30, and the through hole 29 and the through hole 30 are correspondingly connected. A guide plate is rotatably installed, and a fixed shell 27 is fixedly installed on the upper end of the fixed sleeve 28. A sealing cavity 35 is arranged inside the fixed shell 27. The sealing cavity 35 is communicated with the through hole 29. A sealing plate 36 is slidably arranged in the sealing cavity 35. The sealing plate 36 is fixedly connected to the fixed rod 26. The fixed rod 26 passes through the sealing cavity 35 and is fixedly connected to the contact plate 25 outside at one end away from the fixed sleeve 28. A spring is fixedly arranged between the contact plate 25 and the fixed shell 27. The spring sleeve is arranged on the fixed rod 26. The contact plate 25 is in corresponding contact with the cam 24, and the cam 24 is fixedly connected to the drive shaft 21.

[0051] The beneficial effects of the above technical solution are:

[0052] The plurality of mixing holes 31 provided inside the rotating wheel 33 are used for the slurry and the collector to pass through, and because the plurality of mixing holes 31 are shrunk compared to the flow surface of the internal tube hole of the feeding pipe 1, the shear force of the slurry and the collector is increased, thereby achieving the effect of self-stirring, thereby achieving full mixing of the slurry and the collector. When the motor 6 is working, it drives the driving shaft 21 to rotate, the driving shaft 21 drives the gear 1 22 and the cam 24 to rotate, the gear 1 22 drives the gear ring 34 to rotate, and the gear ring 34 drives the rotating wheel 33 to rotate, further increasing the mixing effect of the slurry and the collector. When the cam 24 rotates, its protruding end contacts the contact plate 25, pushing the contact plate 25 to move toward the direction of the rotating wheel 33, and the contact plate 25 drives the fixing rod 26 to move. The fixing rod 26 drives the sealing plate 36 to slide along the sealing chamber 35, and the spring is compressed. During this process, the second through hole 29 and the third through hole 30 are in a connected state. Since the rotating wheel 33 rotates relative to the fixing sleeve 28, as the rotating wheel 33 rotates, the second through hole 29 can be connected with the third through hole 30 at different positions, and the air in the sealing chamber 35 is pushed into the mixing hole 31 through the second through hole 29 and the third through hole 30. When the protruding end of the cam 24 is out of contact with the contact plate 25 and the contact plate 25 and the sealing plate 36 return to their original positions under the elastic action of the spring, the outside air enters the sealing chamber 35 through the air inlet hole 43 for air replenishment. During this process, the second through hole 29 and the third through hole 30 are in a disconnected state, and the inclination of the guide plate The arrangement can only rotate in the direction of the through hole three 30, which guides the flow direction of the air, so that the air flows into the mixing hole 31 in a unidirectional manner, and prevents the slurry and the collector from flowing back into the through hole two 29. When the pressurized gas flows into the mixing hole 31, the flow effect of the slurry and the collector can be increased during the flow of the slurry. After the feed pump 2 stops conveying the slurry, if there is slurry remaining in the mixing hole 31, it is easy to solidify, resulting in clogging of the mixing hole 31. At this time, the motor 6 is still controlled to work. With the rotation of the rotating wheel 33, the slurry can be prevented from being in a static state, making it difficult for it to adhere to the mixing hole 31. At this time, the pressurized gas is continuously sent into the mixing hole 31 through the sealing chamber 35. The arrangement of the through hole one 32 The mixing holes 31 are arranged so that the adjacent mixing holes 31 are interconnected. As the pressurized gas continuously enters the mixing holes 31, the slurry remaining in the mixing holes 31 and the through holes 32 connected thereto can be fed into the feed pipe 1, thereby avoiding blockage of the through holes 32, and ensuring the normal flow of the slurry in the mixing holes 31 when the feed pump 2 works next time. At the same time, the fixed shell 5 is threadedly connected to the feed pipe 1 through a plurality of bolts 1, and the motor 6 is threadedly connected to the feed pipe 1 through a plurality of bolts 2. The above-mentioned threaded connection methods all adopt the existing connection methods of bolts and threaded holes, which will not be described in detail in the present invention, so as to facilitate the installation and disassembly of the anti-blocking slurry adjusting mechanism and the motor 6 and the feed pipe 1, thereby facilitating the cleaning and maintenance of the rotating wheel 33 installed in the fixed shell 5.

[0053] Example 3

[0054] On the basis of Example 2, Figure 2-Figure 5 As shown, the flotation mechanism includes a working shell 9, a flotation chamber 10 is arranged inside the working shell 9, the inlet of the flotation chamber 10 is connected with the discharge port of the feed pipe 1, the left outlet 1 of the lower end of the flotation chamber 10 is connected with the discharge pipe 19, the right outlet 2 of the lower end of the flotation chamber 10 is connected with the discharge pipe 2 20, a guide block 17 is fixedly arranged in the middle of the lower end of the flotation chamber 10, a limit block 15 is fixedly arranged at the right end of the flotation chamber 10, a flow path 18 is arranged between the limit block 15, the guide block 17 and the right end of the flotation chamber 10, the flow path 18 is connected with the flotation chamber 10, a rectifier module 16 is fixedly arranged in the flow path 18, an outlet 3 is arranged on the lower side of the right end of the working shell 9, the flow path 18 is connected with the overflow weir 23 through the outlet 3, and the overflow weir 23 is fixedly installed on the lower side of the right end of the working shell 9.

[0055] The beneficial effects of the above technical solution are:

[0056] The flotation slurry is sprayed out through the nozzle 42 to form a jet and enter the flotation chamber 10. The bubbles dissolved in the slurry precipitate to form stable bubbles and float up and are collected by overflow. The tailings cannot float up. Under the impact force of the jet, the flotation slurry enters the flow path 18 along the lower end of the flotation chamber 10 for classification. For specific steps, please refer to 202010228150.3-An improved flotation system and flotation process for difficult-to-select minerals.

[0057] Example 4

[0058] On the basis of Example 3, Figure 2-Figure 5 As shown, an outlet 4 11 is provided on the upper right side of the working shell 9, and the flotation chamber 10 is communicated with the collecting chamber 12 in the collecting shell 13 through the outlet 4 11. The outer shell of the collecting shell 13 is slidably connected to the upper right side of the working shell 9, and a liquid outlet 14 is provided on the right end of the outer shell of the collecting shell 13. A rotating shaft is symmetrically provided on both sides of the lower end of the outer shell of the collecting shell 13, and the rotating shaft is rotatably connected to the outer shell of the collecting shell 13. The rotating shaft is fixedly connected to the bottom cover 38 of the collecting shell 13. A conveying device is correspondingly provided at the middle part of the right end of the working shell 9, and the conveying device is correspondingly arranged on the lower side of the collecting shell 13.

[0059] It also includes an automatic discharging mechanism, which includes an electric telescopic rod 39 symmetrically arranged at the front and rear ends of the working shell 9, the fixed end of the electric telescopic rod 39 is fixedly connected to the working shell 9, the movable end of the electric telescopic rod 39 is rotatably connected to the rotating shaft, the rotating shaft passes through the collecting shell 13 and is fixedly connected to the end away from the working shell 9 and is gear 2 40, gear 2 40 is meshed with a rack 41, the rack 41 is fixedly connected to the working shell 9, and a weighing sensor is installed at the connection between the electric telescopic rod 39 and the rotating shaft, and the weighing sensor is electrically connected to the electric telescopic rod 39 through a controller.

[0060] The beneficial effects of the above technical solution are:

[0061] A defoaming device is installed at the outlet 4 11, and the overflowing concentrate enters the collecting chamber 12 for collection after the bubbles are eliminated by the defoaming device. The bottom cover 38 of the collecting shell 13 is an inclined end, and a screening net is provided in the liquid outlet 14 to facilitate the discharge of the residual liquid through the liquid outlet 14. After the weighing sensor detects that the weight of the concentrate collected in the collecting chamber 12 (i.e., the detection value of the weighing sensor minus the weight of the collecting shell 13 and the weight of the rotating shaft) reaches the target amount, the weighing sensor controls the electric telescopic rod 39 to retract through the controller, and the electric telescopic rod 39 drives the collecting shell 13 and the gear 2 40 to move downward through the rotating shaft, and the gear 2 40 moves downward along the rack 41. In this process, the gear 2 40 can rotate downward, and the gear 2 40 drives the bottom cover 38 of the collecting shell 13 to rotate downward through the rotating shaft, and the bottom cover 38 of the collecting shell 13 is no longer in contact with the bottom cover 38 of the collecting shell 13. The lower ends of the outer shell of the collecting shell 13 are in contact, so that the bottom cover 38 of the collecting shell 13 and the outer shell of the collecting shell 13 are opened, so that the concentrate in the collecting chamber 12 is discharged. After the concentrate in the collecting chamber 12 is discharged, the concentrate falls on the conveying device and is conveyed to the target collection position. The conveying device (not shown in the figure) can be a belt conveying mechanism. After the concentrate is discharged, when the detection value of the weighing sensor is the sum of the weight of the collecting shell 13 and the weight of the rotating shaft, the weighing sensor controls the electric telescopic rod 39 to extend through the controller, so that the collecting shell 13 returns to its original position. During this process, the gear 2 40 rotates upward, so that the bottom cover 38 of the collecting shell 13 and the outer shell of the collecting shell 13 are closed. The setting of the automatic discharging mechanism can continuously and automatically float the concentrate. In this process, no human intervention is required, thereby improving the flotation efficiency of the concentrate.

[0062] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A mineral flotation process, characterized in that: The following steps are involved: Step 1: pre-treating the bubble mechanism (7); Step 2: Turn on the feed pump (2) to allow the slurry to enter the feed pipe (1), and at the same time control the bubble mechanism (7) and the collector dosing mechanism (3) to start working, so that the collector and the bubble agent enter the feed pipe (1). The slurry is first mixed with the collector and enters the anti-blocking slurry mixing mechanism for full mixing. The mixture of the collector and the slurry is sprayed into the feed pipe (1) through the nozzle (42) and mixed with the bubble agent to form a flotation slurry; Step 3: feeding the flotation slurry in the feed pipe (1) into the flotation mechanism, and collecting the flotation concentrate by overflow; Step 4: The coarse particles of the flotation tailings with low ash content are discharged through the discharge pipe 2 (20) and enter the secondary flotation process, and the fine particles of the flotation tailings with high ash content overflow through the overflow weir (23) and enter the concentration process; Step 5: Control the feed pump (2), the bubble mechanism (7) and the collector dosing mechanism (3) to stop working; Step 6: The tailings remaining in the flotation mechanism are discharged through the discharge pipe 1 (19) and enter the secondary flotation operation; Step 7: After the slurry stops being transported in the feed pipe (1), the anti-blocking slurry adjusting mechanism is controlled to continue to work, so as to avoid the slurry remaining in the anti-blocking slurry adjusting mechanism; The feed inlet of the feed pipe (1) is connected to the feed pump (2); an anti-blocking slurry adjustment mechanism and a nozzle (42) are installed on the feed pipe (1); the nozzle (42) is arranged on a side of the anti-blocking slurry adjustment mechanism away from the feed pump (2); and the discharge port of the feed pipe (1) is connected to the flotation mechanism; The collector dosing mechanism (3) is connected to a delivery pipe (4), the bubble mechanism (7) is connected to a delivery pipe (8), both the delivery pipe (4) and the delivery pipe (8) are connected to the feed pipe (1), and both the delivery pipe (4) and the delivery pipe (8) are equipped with a valve (1); The anti-blocking slurry mixing mechanism comprises a fixed shell (5), the fixed shell (5) being threadedly connected to the feed pipe (1) via a plurality of bolts, mounting holes being provided through the left and right ends of the middle of the fixed shell (5), the mounting holes being communicated with the internal pipe holes of the feed pipe (1), a rotating wheel (33) being rotatably provided in the mounting holes, a plurality of mixing holes (31) being arranged in a circumferential array inside the rotating wheel (33), and the mixing holes (31) being provided through the left and right ends of the rotating wheel (33), a through hole (32) being communicated between adjacent mixing holes (31), and the mixing holes (31) being communicated with the internal pipe holes of the feed pipe (1); A working hole (37) is provided in the middle of the upper end of the fixed shell (5), the working hole (37) is communicated with the mounting hole, a gear ring (34) in the working hole (37) is fixedly connected to the rotating wheel (33), the gear ring (34) is meshed with the gear (22), the gear (22) is fixedly connected to the motor (6) via the drive shaft (21), and the motor (6) is threadedly connected to the upper end of the conveying pipe (1) via a plurality of bolts; The anti-blocking slurry adjustment mechanism also includes a fixed sleeve (28), the fixed sleeve (28) is rotatably connected to the rotating wheel (33), the fixed sleeve (28) is fixedly connected to the side end of the working hole (37), a second through hole (29) and an air inlet hole (43) are provided on the upper side of the fixed sleeve (28), and the second through hole (29) and the air inlet hole (43) are connected, and the air inlet hole (43) is connected to the working hole (37), a plurality of third through holes (30) are evenly distributed in the circumferential direction of the outer side of the rotating wheel (33), the plurality of third through holes (30) are connected to the plurality of mixing holes (31) in the outermost circle in a one-to-one correspondence, the second through hole (29) and the third through hole (30) are connected in correspondence, a guide plate is rotatably installed in the second through hole (29), and the fixed A second fixed shell (27) is fixedly provided at the upper end of the sleeve (28), a sealing cavity (35) is provided inside the second fixed shell (27), the sealing cavity (35) is communicated with the second through hole (29), a sealing plate (36) is slidably provided in the sealing cavity (35), the sealing plate (36) is fixedly connected to the fixing rod (26), the fixing rod (26) passes through the sealing cavity (35) and one end away from the fixing sleeve (28) is fixedly connected to the contact plate (25) outside, a spring is fixedly provided between the contact plate (25) and the second fixed shell (27), the spring sleeve is arranged on the fixing rod (26), the contact plate (25) is in corresponding contact with the cam (24), and the cam (24) is fixedly connected to the driving shaft (21).

2. A mineral flotation process according to claim 1, characterized in that: The flotation mechanism comprises a working shell (9), a flotation chamber (10) is provided inside the working shell (9), an inlet of the flotation chamber (10) is connected to a discharge port of a feed pipe (1), a left outlet 1 at the lower end of the flotation chamber (10) is connected to a discharge pipe 1 (19), a right outlet 2 at the lower end of the flotation chamber (10) is connected to a discharge pipe 2 (20), a guide block (17) is fixedly provided at the middle of the lower end of the flotation chamber (10), and a guide block (17) is fixedly provided at the right end of the flotation chamber (10). A flow passage (18) is provided between the limit block (15), the guide block (17) and the right end of the flotation chamber (10); the flow passage (18) is in communication with the flotation chamber (10); a rectifier module (16) is fixedly provided in the flow passage (18); a third outlet is provided at the lower right end of the working shell (9); the flow passage (18) is in communication with an overflow weir (23) via the third outlet; and the overflow weir (23) is fixedly installed at the lower right end of the working shell (9).

3. A mineral flotation process according to claim 1, characterized in that: An outlet four (11) is provided on the upper right end of the working shell (9), and the flotation chamber (10) is communicated with the collecting chamber (12) in the collecting shell (13) through the outlet four (11). The outer shell of the collecting shell (13) is slidably connected to the upper right end of the working shell (9), and a liquid outlet (14) is provided on the right end of the outer shell of the collecting shell (13). Rotating shafts are symmetrically provided on the front and rear sides of the lower end of the outer shell of the collecting shell (13), and the rotating shafts are fixedly connected to the bottom cover (38) of the collecting shell (13). A conveying device is correspondingly provided at the middle part of the right end of the working shell (9), and the conveying device is correspondingly arranged on the lower side of the collecting shell (13).

4. A mineral flotation process according to claim 3, characterized in that: The automatic discharging mechanism also includes an electric telescopic rod (39) symmetrically arranged at the front and rear ends of the working shell (9), the fixed end of the electric telescopic rod (39) being fixedly connected to the working shell (9), the movable end of the electric telescopic rod (39) being rotatably connected to a rotating shaft, the rotating shaft passing through the collecting shell (13) and being fixedly connected to a second gear (40) at one end away from the working shell (9), the second gear (40) being meshed with a rack (41), the rack (41) being fixedly connected to the working shell (9), and a weighing sensor being installed at the connection between the electric telescopic rod (39) and the rotating shaft, the weighing sensor being electrically connected to the electric telescopic rod (39) via a controller.

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