A method for recovering fine scheelite in a cleaning stage of flotation

Abstract

This invention relates to the field of flotation technology for the fine-grained scheelite concentrate stage, specifically a method for the flotation and recovery of fine-grained scheelite concentrate. The method includes a flotation and recovery device for fine-grained scheelite concentrate. A rotary motor is vertically mounted on the front upper side of a support frame, and a rotating rod is mounted on the output end of the rotary motor. A stirring block is fixedly connected to the outer wall of the rotating rod. Reagent tanks are mounted on both sides of the support frame, and a suction pump is connected to the lower end of each reagent tank. A reagent inlet pipe is connected to the lower end of the suction pump. This method allows for flexible reagent addition through multiple distributed reagent tanks, suction pumps, and reagent inlet pipes, facilitating easy adjustment. The rotating stirring block provides heat dissipation, enhancing the flotation effect. Furthermore, the stirring block can be raised, lowered, and rotated using a hydraulic cylinder and servo motor for easy removal and cleaning. The slurry distribution pipe can be spirally guided out via a screw conveyor mechanism, ensuring more stable operation.

Description

Technical Field

[0001] This invention relates to the field of flotation technology for the concentrate stage of scheelite, specifically a flotation recovery method for fine-grained scheelite concentrate stage. Background Technology

[0002] Tungsten is one of the 24 strategic minerals in my country and is widely used in electronic communications, medicine and health, functional materials, aerospace, and national defense. my country is rich in tungsten resources, with reserves and production ranking among the top in the world. In recent years, with the deepening of tungsten mining, low-grade scheelite (WO3 grade less than 0.10%) has gradually become the main target of tungsten resource development and utilization in my country. Improving the beneficiation efficiency of low-grade scheelite resources is of great significance to consolidating my country's advantageous position in tungsten resources. In view of the characteristics of fine-grained minerals, some new flotation processes have been gradually applied to the flotation research and industrial practice of fine-grained minerals. Currently, the main processes include selective flocculation flotation, shear flocculation flotation [2], carrier flotation and oil agglomeration flotation [3-4].

[0003] The existing CN208583480U describes a slurry distribution device for a flotation column. The slurry is installed above the flotation column. The slurry is pumped by a slurry pump and enters through the middle of the slurry tank. Inside the tank, the slurry is guided by a distributor into the slurry pipe. The outlet pipe and the slurry pipe elbow, as well as the elbow and the slurry pipe itself, are connected by flanges. Maintenance only requires removing the bolts on the flanges. If the slurry pipe becomes clogged, it is replaced with a new one. The entire process only requires removing and installing bolts, thus significantly improving maintenance efficiency. However, the existing equipment has shortcomings: poor reagent addition, inflexibility, poor stirring efficiency, inability to clean the stirring mechanism, poor discharge effect, and inconvenience. Therefore, a flotation recovery method for fine-grained scheelite is needed to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a flotation recovery method for fine-grained scheelite in the beneficiation stage, in order to solve the problems mentioned in the background art, such as poor reagent addition effect of the flotation column slurry device, inflexibility, poor stirring efficiency, inability to perform cleaning operation of the stirring mechanism, poor discharge effect, and inconvenience of use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flotation and recovery device for fine-grained scheelite concentrate, comprising a flotation column, a slurry distribution pipe connected to the lower end of the side of the flotation column, feed inlets on both sides of the upper end of the flotation column, and a slurry inlet pipe connected to one side of the feed inlet; an auger mechanism inserted into the inner wall of the slurry distribution pipe; a slurry distribution plate installed at the lower end of the inner wall of the flotation column, with a guide groove at the upper end of the slurry distribution plate; a slurry distribution baffle fixedly connected to the lower end of the inner wall of the guide groove, and one end of the guide groove connected to the auger mechanism; and a support column fixedly connected to the rear side of the flotation column. Furthermore, a hydraulic cylinder is inserted and installed on the inner wall of the support column. A servo motor is installed at one end of the hydraulic cylinder, and a support frame is installed at the output end of the servo motor. A rotary motor is vertically installed on the front side of the upper end of the support frame, and a rotating rod is installed at the output end of the rotary motor. A stirring block is fixedly connected to the outer wall of the rotating rod. A medicine tank is installed on both sides of the support frame, and a suction pump is connected to the lower end of the medicine tank. A medicine inlet pipe is connected to the lower end of the suction pump. A rotating ring is installed on the edge of one end of the slurry inlet pipe, and a threaded splicing block is connected to one end of the rotating ring. The threaded splicing block is inserted and installed into the feed port.

[0006] A flotation recovery method for fine-grained scheelite in a beneficiation stage, specifically comprising:

[0007] S1: First, the raw ore slurry from the fine ore workshop is introduced through the slurry inlet pipe and feed inlet;

[0008] S2: Next, the slurry is heated to 95°C using a stirring block;

[0009] S3: Then, the de-agent is heated and de-agented for 30 minutes through the reagent tank, suction pump and inlet pipe, and then clean water is added to adjust the slurry concentration to about 25%.

[0010] S4: Next, supplement the descaling agent dosage test at 15kg / t, 30kg / t, 45kg / t, and 60kg / t to test the effect of descaling agent dosage on the beneficiation index of scheelite;

[0011] S5: Then, under the condition of a de-chemical agent dosage of 45 kg / t, the effects of diesel engine oil and turbine oil on the selection indicators were investigated respectively. Compared with no oil added, adding 100 g / t diesel engine oil increased the WO3 recovery rate by 11.87% and the WO3 grade by 3.15%, while adding 100 g / t turbine oil increased the WO3 recovery rate by 7.65% and the WO3 grade by 1.93%.

[0012] S6: Next, under the condition of a de-chemical agent dosage of 45 kg / t, the effect of diesel engine oil dosage on the selection indicators was investigated. As the diesel engine oil dosage increased, the WO3 recovery rate and grade gradually increased. When the diesel engine oil dosage exceeded 100 g / t, the WO3 recovery rate and grade decreased. Therefore, the appropriate diesel engine oil dosage was determined to be 100 g / t, at which point the WO3 recovery rate was 83.05% and the WO3 grade was 18.69%.

[0013] S7: Then, a closed-circuit test of the entire process of the fine section was carried out under the conditions of no engine oil and 100g / t diesel engine oil respectively. After one roughing, three scavenging and four cleaning closed-circuit flotation, compared with no engine oil, adding 100g / t diesel engine oil can obtain scheelite concentrate with WO3 grade of 19.969% and WO3 recovery rate of 62.44%. Under the premise of ensuring the final concentrate WO3 grade, the WO3 recovery rate is increased by 7.48%, and the flotation indicators are good.

[0014] Preferably, the feed pipe is spirally connected to the feed inlet on the rotating ring via a threaded splice block, and the feed inlets are symmetrically distributed at the upper end of the flotation column.

[0015] Preferably, the slurry distribution pipes are arranged in a ring on the outer wall of the flotation column, and the slurry distribution pipes are spirally connected to the flotation column through an auger mechanism.

[0016] Preferably, the reagent tanks are distributed in four symmetrical positions on both sides of the support frame, and the reagent tanks are connected to the inlet pipe via a suction pump, with the inlet pipe being perpendicular to the flotation column.

[0017] Preferably, the support frame is connected to the flotation column via a hydraulic cylinder in a lifting and lowering motion.

[0018] Preferably, the support frame is connected in a reset and flip-up configuration via a servo motor.

[0019] Preferably, the shape of the stirring block matches the shape of the inner wall of the flotation column and the separation plate, and the stirring block is rotatably connected to the flotation column via a rotary motor, and the inner wall of the stirring block is an electrically heated structure.

[0020] Preferably, the upper end of the slurry distribution plate has a conical structure, and the position and shape of the guide groove match the position and shape of the slurry distribution pipe.

[0021] Preferably, the slurry baffle has a triangular structure and is distributed in an arc shape on the inner wall of the guide channel.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the flotation recovery method for fine-grained scheelite concentrate can flexibly add reagents through multiple sets of distributed reagent tanks, suction pumps and reagent inlet pipes, which is easy to adjust. It can also rotate and dissipate heat through the stirring block, which enhances the flotation effect. Furthermore, the stirring block can be raised, lowered and rotated by a hydraulic cylinder and servo motor, which is convenient for removal and cleaning. In addition, the slurry pipe can be spirally discharged through an auger mechanism, which makes it more stable in use. Attached Figure Description

[0023] Figure 1 This is a front view of a flotation and recovery device for fine-grained scheelite concentrate according to the present invention.

[0024] Figure 2 This is a cross-sectional view of a flotation and recovery device for fine-grained scheelite concentrate according to the present invention.

[0025] Figure 3 This is a schematic diagram showing the connection between the guide channel and the slurry distribution plate of a flotation and recovery device for fine-grained scheelite concentrate in the present invention.

[0026] Figure 4 This is a schematic diagram showing the connection between the support frame and the hydraulic cylinder of a flotation and recovery device for fine-grained scheelite concentrate section according to the present invention.

[0027] Figure 5 This invention relates to a flotation and recovery device for fine-grained scheelite concentrate. Figure 2 Enlarged view of point A in the middle;

[0028] Figure 6 This invention relates to a flotation and recovery device for fine-grained scheelite concentrate. Figure 2 Enlarged view at point B in the middle;

[0029] Figure 7 This invention relates to a flotation and recovery device for fine-grained scheelite concentrate. Figure 4 Enlarged view of point C in the middle.

[0030] In the diagram: 1. Flotation column, 2. Inlet pipe, 3. Distributor pipe, 4. Feed inlet, 5. Screw mechanism, 6. Reagent tank, 7. Rotary motor, 8. Support frame, 9. Stirring block, 10. Distributor plate, 11. Rotating rod, 12. Guide channel, 13. Distributor baffle, 14. Support column, 15. Hydraulic cylinder, 16. Threaded splice block, 17. Rotating ring, 18. Suction pump, 19. Reagent inlet pipe, 20. Servo motor. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-7 This invention provides a technical solution: a flotation and recovery device for fine-grained scheelite concentrate, comprising a flotation column 1, a feed pipe 2, a distribution pipe 3, a feed inlet 4, an auger mechanism 5, a reagent tank 6, a rotary motor 7, a support frame 8, a stirring block 9, a distribution plate 10, a rotating rod 11, a guide channel 12, a distribution baffle 13, a support column 14, a hydraulic cylinder 15, a threaded splicing block 16, a rotating ring 17, a suction pump 18, a reagent inlet pipe 19, and a servo motor 20. The distribution pipe 3 is connected to the lower side of the flotation column 1, and the feed inlets 4 are installed on both sides of the upper end of the flotation column 1. The feed pipe 2 is connected to one side of the feed inlet 4. The feed pipe 2 is spirally spliced ​​to the feed inlet 4 on the rotating ring 17 through the threaded splicing block 16. The feed inlets 4 are symmetrically distributed at the upper end of the flotation column 1, which makes the feed pipe 2 easy to assemble and disassemble and improves the feed efficiency.

[0033] Furthermore, the slurry distribution pipe 3 is arranged in a ring on the outer wall of the flotation column 1, and the slurry distribution pipe 3 is connected to the flotation column 1 in a spiral manner through the auger mechanism 5. This makes it easier for the slurry distribution pipe 3 to guide the material through the auger mechanism 5 in a spiral manner, which is more stable.

[0034] A screw conveyor mechanism 5 is installed inside the inner wall of the slurry pipe 3, and a slurry plate 10 is installed at the lower end of the inner wall of the flotation column 1, with a guide groove 12 opened at the upper end of the slurry plate 10.

[0035] Furthermore, the upper end of the slurry distribution plate 10 has a conical structure, and the position and shape of the guide groove 12 match the position and shape of the slurry distribution pipe 3. This makes it easy for the slurry distribution plate 10 to quickly guide the material through the guide groove 12, resulting in stable material output.

[0036] A slurry baffle 13 is fixedly connected to the lower end of the inner wall of the guide channel 12, and one end of the guide channel 12 is connected to the screw conveyor mechanism 5.

[0037] Furthermore, the slurry baffle 13 has a triangular structure and is distributed in an arc shape on the inner wall of the guide channel 12, which allows the slurry baffle 13 to guide the flow more effectively and is convenient to use.

[0038] A support column 14 is fixedly connected to the rear side of the flotation column 1, and a hydraulic cylinder 15 is inserted and installed on the inner wall of the support column 14. A servo motor 20 is installed at one end of the hydraulic cylinder 15, and a support frame 8 is installed at the output end of the servo motor 20. The support frame 8 is connected to the flotation column 1 in a lifting and moving manner through the hydraulic cylinder 15, so that the support frame 8 can be adjusted in height. The support frame 8 is also connected to the servo motor 20 in a reset and flipping manner, so that the support frame 8 can be easily rotated and adjusted, and the stirring block 9 can be easily removed for cleaning.

[0039] A rotary motor 7 is vertically mounted on the front side of the upper end of the support frame 8, and a rotating rod 11 is mounted on the output end of the rotary motor 7. A stirring block 9 is fixedly connected to the outer wall of the rotating rod 11. The shape of the stirring block 9 matches the shape of the inner wall of the flotation column 1 and the separation plate 10. The stirring block 9 is rotatably connected to the flotation column 1 through the rotary motor 7. The inner wall of the stirring block 9 is electrically heated, which makes it easy for the stirring block 9 to rotate and disperse, resulting in good efficiency and avoiding clogging.

[0040] The support frame 8 has reagent tanks 6 installed on both sides, and the lower end of the reagent tanks 6 is connected to a suction pump 18. The reagent tanks 6 are distributed in four symmetrical positions on both sides of the support frame 8, and the reagent tanks 6 are connected to the inlet pipe 19 through the suction pump 18. The inlet pipe 19 is distributed perpendicular to the flotation column 1. This makes it easier to control and pressurize the reagent tanks 6, and convenient to use. The lower end of the suction pump 18 is connected to the inlet pipe 19. A rotating ring 17 is installed on one edge of the pulp inlet pipe 2, and a threaded splice block 16 is connected to one end of the rotating ring 17. The threaded splice block 16 is inserted into the feed port 4.

[0041] A flotation recovery method for fine-grained scheelite in a beneficiation stage, specifically comprising:

[0042] S1: First, the raw ore slurry from the fine ore workshop is introduced through the slurry inlet pipe 2 and the feed inlet 4.

[0043] S2: Next, heat the slurry to 95°C using the stirring block 9.

[0044] S3: Then, the de-agent is heated and de-agented for 30 minutes through the reagent tank 6, suction pump 18 and inlet pipe 19, and then clean water is added to adjust the slurry concentration to about 25%.

[0045] S4: Next, supplement the test with descaling agent dosage of 15kg / t, 30kg / t, 45kg / t, and 60kg / t to test the effect of descaling agent dosage on the beneficiation index of scheelite.

[0046] S5: Then, under the condition of a de-chemical agent dosage of 45 kg / t, the effects of diesel engine oil and turbine oil on the selection indicators were investigated respectively. Compared with no oil added, adding 100 g / t diesel engine oil increased the WO3 recovery rate by 11.87% and the WO3 grade by 3.15%, while adding 100 g / t turbine oil increased the WO3 recovery rate by 7.65% and the WO3 grade by 1.93%.

[0047] S6: Next, under the condition of a de-chemical agent dosage of 45 kg / t, the effect of diesel engine oil dosage on the selection index was investigated. As the diesel engine oil dosage increased, the WO3 recovery rate and grade gradually increased. When the diesel engine oil dosage exceeded 100 g / t, the WO3 recovery rate and grade decreased. Therefore, the appropriate diesel engine oil dosage was determined to be 100 g / t, at which point the WO3 recovery rate was 83.05% and the WO3 grade was 18.69%.

[0048] S7: Then, a closed-circuit test of the entire process of the fine section was carried out under the conditions of no engine oil and 100g / t diesel engine oil respectively. After one roughing, three scavenging and four cleaning closed-circuit flotation, compared with no engine oil, adding 100g / t diesel engine oil can obtain scheelite concentrate with WO3 grade of 19.969% and WO3 recovery rate of 62.44%. Under the premise of ensuring the final concentrate WO3 grade, the WO3 recovery rate is increased by 7.48%, and the flotation indicators are good.

[0049] Working principle: When using this fine-grained scheelite selection section flotation recovery device, first connect the device to the power supply, then connect the slurry inlet pipe 2 to the feed inlet 4 through the rotating ring 17 and the threaded splicing block 16. Then, slurry is fed through the slurry inlet pipe 2 and the feed inlet 4. Then, the rotating motor 7 drives the stirring block 9 to rotate and stir, thereby dispersing the slurry. Then, de-reagent, machine oil and diesel are added through the reagent tank 6, the suction pump 18 and the reagent inlet pipe 19, and flexibly adjusted. Then, the ore is guided through the guide channel 12 and the slurry baffle 13, and the auger mechanism 5 and the slurry distribution pipe 3 spiral out. When it is necessary to clean the stirring block 9, the hydraulic cylinder 15 can drive the stirring block 9 to rise and rotate it to one side through the servo motor 20, and then it is cleaned. This is the operation process of this fine-grained scheelite selection section flotation recovery device.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for flotation recovery of fine-grained scheelite in a selected section, comprising a flotation recovery device for fine-grained scheelite in a selected section, including a flotation column (1), wherein a slurry distribution pipe (3) is connected and installed at the lower end of the side of the flotation column (1), and feed inlets (4) are installed on both sides of the upper end of the flotation column (1), and a slurry inlet pipe (2) is connected and installed on one side of the feed inlet (4), characterized in that: The inner wall of the slurry pipe (3) is fitted with a screw conveyor mechanism (5). The lower end of the inner wall of the flotation column (1) is fitted with a slurry plate (10), and the upper end of the slurry plate (10) is provided with a guide groove (12). The lower end of the inner wall of the guide groove (12) is fixedly connected with a slurry baffle (13), and one end of the guide groove (12) is connected to the screw conveyor mechanism (5). The rear side of the flotation column (1) is fixedly connected with a support column (14), and a hydraulic cylinder (15) is fitted with the inner wall of the support column (14). One end of the hydraulic cylinder (15) is fitted with a servo motor (20), and the output end of the servo motor (20) is fitted with a support frame (8). A rotary motor (7) is vertically installed on the front side of the upper end of the support frame (8), and a rotating rod (11) is installed at the output end of the rotary motor (7). A stirring block (9) is fixedly connected to the outer wall of the rotating rod (11). A medicine tank (6) is installed on both sides of the support frame (8), and a suction pump (18) is connected to the lower end of the medicine tank (6). A medicine inlet pipe (19) is connected to the lower end of the suction pump (18). A rotating ring (17) is installed on the edge of one end of the slurry inlet pipe (2), and a threaded splicing block (16) is connected to one end of the rotating ring (17). The threaded splicing block (16) is inserted into the feed inlet (4). A flotation recovery method for fine-grained scheelite in a beneficiation stage, specifically comprising: S1: First, the raw ore slurry from the fine ore workshop is introduced through the slurry inlet pipe (2) and the feed inlet (4); S2: Then the slurry is heated to 95°C by the stirring block (9); S3: Then, the de-agent is heated and de-agented for 30 minutes through the reagent tank (6), suction pump (18) and inlet pipe (19), and then clean water is added to adjust the slurry concentration to about 25%. S4: Next, supplement the descaling agent dosage test at 15kg / t, 30kg / t, 45kg / t, and 60kg / t to test the effect of descaling agent dosage on the beneficiation index of scheelite; S5: Then, under the condition of a de-chemical agent dosage of 45 kg / t, the effects of diesel engine oil and turbine oil on the selection indicators were investigated respectively. Compared with no oil added, adding 100 g / t diesel engine oil increased the WO3 recovery rate by 11.87% and the WO3 grade by 3.15%, while adding 100 g / t turbine oil increased the WO3 recovery rate by 7.65% and the WO3 grade by 1.93%. S6: Next, under the condition of a de-chemical agent dosage of 45 kg / t, the effect of diesel engine oil dosage on the selection indicators was investigated. As the diesel engine oil dosage increased, the WO3 recovery rate and grade gradually increased. When the diesel engine oil dosage exceeded 100 g / t, the WO3 recovery rate and grade decreased. Therefore, the appropriate diesel engine oil dosage was determined to be 100 g / t, at which point the WO3 recovery rate was 83.05% and the WO3 grade was 18.69%. S7: Then, a closed-circuit test of the entire process of the fine section was carried out under the conditions of no engine oil and 100g / t diesel engine oil respectively. After one roughing, three scavenging and four cleaning closed-circuit flotation, compared with no engine oil, adding 100g / t diesel engine oil can obtain scheelite concentrate with WO3 grade of 19.969% and WO3 recovery rate of 62.44%. Under the premise of ensuring the final concentrate WO3 grade, the WO3 recovery rate is increased by 7.48%, and the flotation indicators are good.

2. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 1, characterized in that: The feed pipe (2) is installed in a spiral splice on the rotating ring (17) and the feed port (4) by a threaded splice block (16), and the feed port (4) is symmetrically distributed at the upper end of the flotation column (1).

3. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 2, characterized in that: The slurry distribution pipe (3) is distributed in a ring position on the outer wall of the flotation column (1), and the slurry distribution pipe (3) is connected to the flotation column (1) in a spiral manner through the screw conveyor mechanism (5).

4. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 3, characterized in that: The reagent tanks (6) are distributed in four symmetrical positions on both sides of the support frame (8), and the reagent tanks (6) are connected to the inlet pipe (19) by a suction pump (18). The inlet pipe (19) is vertically distributed to the flotation column (1).

5. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 4, characterized in that: The support frame (8) is connected to the flotation column (1) in a lifting and lowering motion via a hydraulic cylinder (15).

6. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 5, characterized in that: The support frame (8) is connected in a reset and flipping manner via a servo motor (20).

7. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 6, characterized in that: The shape of the stirring block (9) matches the shape of the inner wall of the flotation column (1) and the separation plate (10), and the stirring block (9) is rotatably connected to the flotation column (1) through a rotary motor (7). The inner wall of the stirring block (9) is an electrically heated structure.

8. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 7, characterized in that: The upper end of the slurry distribution plate (10) is a conical structure, and the position and shape of the guide groove (12) match the position and shape of the slurry distribution pipe (3).

9. The method for flotation recovery of fine-grained scheelite in a beneficiation section according to claim 8, characterized in that: The slurry baffle (13) has a triangular structure and is distributed in an arc shape on the inner wall of the guide channel (12).

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