Mineral separation and quality improvement process for leucite type rutile ore

Abstract

The invention discloses a leucite type rutile ore dressing and upgrading process, which comprises the following process steps in sequence: carrying out primary dry ball milling on leucite type rutile ore to reduce the treatment procedure of the treatment capacity of the subsequent dressing treatment procedure, carrying out secondary ball milling on the remaining concentrate, and then carrying out shaking table reselection to screen out muddy substances to obtain the leucite type rutile ore. And carrying out flotation and wet magnetic separation on the remaining concentrate to respectively obtain rutile concentrate and ilmenite. According to the method, magnetic separation is set before flotation, the treatment capacity is reduced, part of independent ilmenite obtained after ball milling is screened out in advance, energy consumption of follow-up drying is reduced, it is avoided that the content of impurities in materials is high during follow-up treatment, mud is removed as much as possible as soon as possible, it can be guaranteed that a better treatment environment is provided for the follow-up treatment procedure, and the quality of ilmenite is improved. And the influence of excessive mud on equipment used in the subsequent mineral separation process is also avoided.

Description

Technical Field

[0001] The invention relates to a process for beneficiating and improving the quality of eclogite-type rutile ore. Background Art

[0002] The eclogite-type rutile ore has the characteristics of simple composition, coarse embedded particle size, many minerals that can be comprehensively recycled, and high economic value. It is a type of primary rutile ore with great development and utilization advantages. The eclogite-type rutile ore is a mineral resource with high economic value. Its main components are rutile, ilmenite, pyroxene, tremolite, etc. The rutile and ilmenite in the eclogite-type rutile resources have high application value. They can be used in the manufacture of high-temperature ceramics, protective coatings, catalysts, electronic materials and other fields. In addition, pyroxene, tremolite and other minerals in the eclogite-type rutile can also be used in the manufacture of various building materials, ceramics and abrasives. In order to seek a suitable beneficiation method and process flow for eclogite-type rutile ore, many scholars have conducted a lot of research on its beneficiation test and development and utilization. The study shows that garnet can be recovered by magnetic separation; rutile can be recovered by flotation or gravity separation, and the selected rutile needs further electrostatic separation or acid washing to be purified. Eclogite-type rutile ore can generally produce a variety of concentrate products. The mineral processing process is relatively complicated and usually requires the joint completion of gravity separation, magnetic separation, flotation, electrostatic separation and acid washing.

[0003] In the paper "Comparative Study on Mineral Processing Technology of Qinghai Wulan Eclogite-type Rutile Ore" published in Volume 37, Issue 5 of the Journal of Qinghai University in October 2019, Zhang Haiqing mentioned that the use of gravity separation (de-sludge)-flotation-magnetic separation-electrostatic separation process can improve its recovery rate. Patent with announcement number CN101879479B: A mineral processing method for eclogite-type rutile ore, the method process is: after grinding the eclogite-type rutile ore, flotation garnets are obtained to obtain garnet concentrate; garnet tailings are classified; mixed flotation is performed to obtain a mixed coarse concentrate of garnet and rutile, and separated from omphacite to obtain omphacite concentrate; mixed coarse concentrate is separated to obtain garnet concentrate and rutile coarse concentrate; magnetic separation is performed, and the rutile coarse concentrate is subjected to magnetic separation to obtain rutile concentrate. That is to say, the existing technology basically performs magnetic separation at the end or near the end of the mineral processing process to obtain ilmenite, but because the magnetic separation is set after flotation, it still needs to be dried in the future. On the one hand, it is not energy-saving. On the other hand, the design of the entire mineral processing process makes the processing capacity of the entire mineral processing process large. Only in the process after flotation does the processing capacity decrease (the content of impurities in the material is high during subsequent processing). In addition, the flotation machine used in the flotation process has the following working principle: the motor drives the impeller to rotate to generate centrifugal force, and then forms a negative pressure zone between the impeller and the stator, so that the slurry and air are mixed and enter the flotation tank. The stirring action makes the slurry fully contact with the flotation agent, and the mineral particles change their surface properties by adsorbing the agent, and then adhere to the rising bubbles to form a mineralized foam layer. The mineralized foam is scraped out to become a concentrate, and the unselected mineral particles return to the slurry and continue to participate in the flotation process. During flotation, the bolts that fix the stator and the impeller shaft sleeve may sometimes be corroded or fall off due to rotational impact vibration, which causes the impeller to contact the stator, increasing the motor load and causing the motor to heat up. The impeller and stator may also wear each other, increasing maintenance costs and frequency. In the mineral processing and quality improvement process, unnecessary downtime caused by flotation machine failure affects mineral processing efficiency and cannot guarantee production efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a eclogite-type rutile ore dressing and quality improvement process, in which magnetic separation is arranged before flotation to reduce the processing volume, screen out part of the independent ilmenite after ball milling in advance, and also reduce the energy consumption of subsequent drying.

[0005] To achieve the above purpose, the technical solution of the present invention is to design a ore dressing and quality improvement process for eclogite-type rutile ore, which is composed of the following process steps performed in sequence: preliminary dry ball milling of eclogite-type rutile ore, a processing step for reducing the processing amount of subsequent ore dressing processing steps, the remaining concentrate is subjected to two ball milling steps and then the sludge is screened out by a shaking table gravity separation, and the remaining concentrate is subjected to flotation and wet magnetic separation steps to obtain rutile concentrate and ilmenite respectively. For flotation, separation and other processing steps, garnet concentrate, rutile coarse ore and diopside concentrate can be selected, which is a prior art and will not be repeated. After dry ball milling, a processing step for reducing the processing amount of subsequent ore dressing processing steps is set, which can reduce the processing amount of subsequent ore dressing processing steps such as flotation magnetic separation steps, and remove part of the ore or impurities before wet grinding or flotation or shaking table gravity separation and other processing steps with water, so as to reduce the processing amount of subsequent processes. It has a significant quality improvement effect on the ore dressing process.

[0006] A further technical solution is that the second ball milling process is a wet ball milling process; a wet magnetic separation process is provided between the second ball milling process and the shaking table gravity separation process; The aforementioned treatment process for reducing the processing volume of subsequent mineral processing processes includes a dry magnetic separation process after preliminary dry ball milling to magnetically separate part of the ilmenite in the eclogite-type rutile ore. Removing part of the ilmenite before wet milling or flotation or shaking table gravity separation can reduce the processing volume of subsequent mineral processing processes such as flotation and magnetic separation. Magnetic separation is set before flotation to reduce the processing volume, screen out part of the independent ilmenite after ball milling in advance, and reduce the energy consumption of subsequent drying.

[0007] A further technical solution is that in the flotation process, the flotation machine is equipped with an auxiliary protection mechanism to ensure the continuity and stability of the mineral processing and quality improvement process. During the flotation process, the bolts that fix the stator and the impeller shaft sleeve may sometimes be corroded or fall off due to rotational impact vibration, which may cause the impeller to contact the stator, increase the motor load and make the motor hot, and cause mutual wear between the impeller and the stator, increasing the maintenance cost and frequency. The auxiliary protection mechanism can effectively avoid this situation.

[0008] A further technical solution is that the flotation machine includes a flotation tank, a driving motor fixed on the outer wall of the flotation tank, an impeller shaft connected to the driving motor through a belt transmission mechanism, a sleeve fixedly connected to the flotation tank is arranged outside the impeller shaft, the lower end of the sleeve is fixedly connected to the stator by bolts, the lower end of the impeller shaft is fixedly connected to the impeller located in the middle of the stator, the sleeve is connected to an air supply pipe, and the flotation tank is also provided with a bubble scraping mechanism and a motor driving the bubble scraping mechanism. A circle of holes is set on the stator. Since the holes on the stator of the flotation machine are mainly used to stabilize the flow of ore pulp during the flotation process and prevent the ore pulp from disturbing the foam layer, a stable foam layer is formed. The holes on the stator are the channels for the rotor to throw out the ore pulp. The size and number of the holes affect the size and amount of the flotation bubbles. The holes on the stator function in the following ways: ‌Stabilize the foam layer‌: The holes on the stator help stabilize the foam layer on the top of the flotation tank, prevent the slurry from disturbing the foam layer, and ensure the stability of the foam layer‌.

[0009] Prevent eddy current: The stator is equivalent to a stabilizer, which can prevent the eddy current zone generated by the rotor from approaching the foam layer, thereby maintaining the stability of the slurry surface.

[0010] ‌Protect the rotor‌: The stator can also protect the rotor, making it easier to start the flotation machine and reducing the wear of the rotor and stator. The motor also drives the scraping mechanism to rotate through a belt drive mechanism.

[0011] A further technical solution is that the auxiliary protection mechanism is composed of a lever hinged on the sleeve and a stainless steel wire rope fixedly connected to the lever, and the other end of the stainless steel wire rope is fixedly connected to the upper end surface of the stator; four bolts are provided and are arranged at the four corners of the lower end of the sleeve, and four levers are provided, and the four levers form two groups, and the two groups of levers are arranged in a cross shape and one group is located above the other group.

[0012] A further technical solution is that, in each lever group, one of the two levers is large and the other is small, and an opening is provided in the middle of the large lever to accommodate the small lever, and an opening is provided in the middle of the small lever to avoid the sleeve of the impeller shaft, and a fixed shaft for rotating connection of the lever is fixedly arranged on the outer wall of the sleeve, and four fixed shafts are arranged opposite to each other; each lever is matched with two stainless steel wire ropes, and the two stainless steel wire ropes are fixedly connected to the two ends of the lever, and the length of one stainless steel wire rope is sufficient to be in a straight state after the two ends are fixedly connected, and the length of the other stainless steel wire rope is sufficient to be in a slightly relaxed state after the two ends are fixedly connected; the two stainless steel wire ropes matched with the same lever are close to the connection point with the upper end face of the stator.

[0013] The length of a stainless steel wire rope is such that it is in a straight state after the two ends are fixedly connected (that is, one end is connected to the end of the lever, and the other end is fixedly connected to the upper end face of the stator; there is a connection point between the stainless steel wire rope and the lever, and there is a connection point between the stainless steel wire rope and the upper end face of the stator), that is, the length of this stainless steel wire rope is the distance between the two connection points, and this distance (that is, the length of the stainless steel wire rope) is equal to the distance between the two connection points after the stator and the sleeve are fixedly connected by bolts and the lever is in a horizontal state; the length of another stainless steel wire rope is such that it is in a slightly relaxed state after the two ends are fixedly connected (that is, one end is connected to the end of the lever, and the other end is fixedly connected to the upper end face of the stator; there is a connection point between the stainless steel wire rope and the lever, and there is a connection point between the stainless steel wire rope and the upper end face of the stator). The small lever is a wide lever with an opening in the middle to avoid (avoid air) the sleeve of the impeller shaft, and the large lever outside the small lever is also a similar structure, but the opening of the large lever is to avoid the small lever.

[0014] Due to the setting of the auxiliary protection mechanism, when the bolts fixing the stator and the impeller shaft sleeve are corroded or fall off due to rotation impact vibration, the impeller and the stator can be prevented from contacting each other, thus avoiding the situation where the motor load increases and the motor becomes hot, and also avoiding the mutual wear between the impeller and the stator, which will not increase the maintenance cost and maintenance frequency; it improves the mineral processing efficiency, ensures the production efficiency, avoids the shutdown caused by the failure of the flotation machine, and ensures the continuity and stability of the mineral processing and quality improvement process.

[0015] In addition, the setting of the lever can serve as a reminder after the bolt falls off. When the workers in the workshop find that the lever is tilted (especially because the setting of the large lever sleeved with the small lever makes it more obvious to find the tilt of the two levers when two relatively set bolts fall off, and the two levers are tilted in opposite directions, which is visually easier to be found by the workers in the workshop, and serves as a good reminder. The workshop workers will record it after seeing it, and replace it with a new good bolt immediately when the machine is shut down normally), it means that the bolts fixing the stator and the impeller shaft sleeve have fallen off. When this work is completed, that is, when the machine is shut down normally, the bolts can be replaced, and the machine does not need to be shut down as soon as the bolt falls off, which affects the mineral processing efficiency. Therefore, this auxiliary protection mechanism not only plays a protective role, but also can avoid the contact between the impeller and the stator after the bolt falls off, and avoid the increase of the motor load. It also plays a good reminder role to remind the workers to replace the bolts immediately after the normal shutdown to ensure the connection between the stator and the sleeve. The setting of the auxiliary protection mechanism can play a protective role when the bolt falls off, and still maintain the connection between the stator and the sleeve.

[0016] The advantages and beneficial effects of the present invention are: a treatment process for reducing the processing volume of subsequent mineral processing processes is set after dry ball milling, which can reduce the processing volume of subsequent mineral processing processes such as flotation and magnetic separation processes, and remove part of the ore or impurities before wet grinding, flotation, or shaking table gravity separation and other water-containing processing processes, thereby reducing the processing volume of subsequent processes. It has a significant effect on improving the quality of mineral processing technology.

[0017] Removing part of the ilmenite before wet processing steps such as wet grinding, flotation or shaking table gravity separation can reduce the processing volume in subsequent mineral processing steps such as flotation and magnetic separation. Setting up magnetic separation before flotation can reduce the processing volume, screen out part of the independent ilmenite after ball milling in advance, and reduce the energy consumption of subsequent drying.

[0018] Due to the setting of the auxiliary protection mechanism, when the bolts fixing the stator and the impeller shaft sleeve are corroded or fall off due to rotation impact vibration, the impeller and the stator can be prevented from contacting each other, thus avoiding the situation where the motor load increases and the motor becomes hot, and also avoiding the mutual wear between the impeller and the stator, which will not increase the maintenance cost and maintenance frequency; it improves the mineral processing efficiency, ensures the production efficiency, avoids the shutdown caused by the failure of the flotation machine, and ensures the continuity and stability of the mineral processing and quality improvement process.

[0019] In addition, the setting of the lever can serve as a reminder after the bolt falls off. When the workers in the workshop find that the lever is tilted (especially because the setting of the large lever sleeved with the small lever makes it more obvious to find the tilt of the two levers when two relatively set bolts fall off, and the two levers are tilted in opposite directions, which is visually easier to be found by the workers in the workshop, and serves as a good reminder. The workshop workers will record it after seeing it, and replace it with a new good bolt immediately when the machine is shut down normally), it means that the bolts fixing the stator and the impeller shaft sleeve have fallen off. When this work is completed, that is, when the machine is shut down normally, the bolts can be replaced, and the machine does not need to be shut down as soon as the bolt falls off, which affects the mineral processing efficiency. Therefore, this auxiliary protection mechanism not only plays a protective role, but also can avoid the contact between the impeller and the stator after the bolt falls off, and avoid the increase of the motor load. It also plays a good reminder role to remind the workers to replace the bolts immediately after the normal shutdown to ensure the connection between the stator and the sleeve. The setting of the auxiliary protection mechanism can play a protective role when the bolt falls off, and still maintain the connection between the stator and the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a process flow diagram of Embodiment 1 of a ore dressing and quality improvement process of eclogite-type rutile ore of the present invention; Figure 2 is a schematic diagram of a second embodiment of the present invention; Figure 3 yes Figure 2 Side view after horizontal placement; Figure 4 is a perspective view of a schematic diagram of a third embodiment of the present invention; Figure 5 yes Figure 4 An enlarged schematic diagram of the middle flexible filter screen and the cam mechanism; Figure 6 yes Figure 4 A partial enlarged schematic diagram of the middle protrusion and the vicinity of the flexible filter screen; Figure 7 yes Figure 5 An enlarged schematic diagram of the cam mechanism; Figure 8 yes Figure 7 Side view of Fig. 9 is a schematic diagram of a fourth embodiment of the present invention; Fig.10 is a schematic diagram of Embodiment 5 of the present invention; Fig.11 yes Fig.10 A schematic diagram from another perspective; Fig.12 yes Fig.11 Schematic diagram from another perspective after removing the flotation cell; Fig.13 yes Fig.12 Schematic diagram of the main view after rotating 180°; Fig.14 yes Fig.13 AA section view; Fig.15 yes Fig.10 A schematic diagram from another perspective; Fig.16 yes Fig.15 A schematic diagram showing only one lever; Fig.17 yes Fig.15 A top view of a large lever and a small lever set at the same position; Fig.18 yes Fig.17 Schematic diagram of the breakdown of medium and large levers and small levers; Fig.19 is a schematic diagram of a sixth embodiment of the present invention; Fig. 20 yes Fig.19 Top view of the stainless steel wire rope assembly on the left side of the center.

[0021] In the figure: 1. demud box; 2. box bottom plate; 3. protrusion; 4. discharge port; 5. vibration motor; 6. flexible filter screen; 7. cam mechanism; 8. upper transition edge of protrusion and inclined plate; 9. bottom plate; 10. cam; 11. intermediate wheel; 12. intermediate wheel seat; 13. push rod; 14. flexible sleeve; 15. cylinder; 16. flotation tank; 17. drive motor; 18. belt transmission mechanism; 19. impeller shaft; 20. sleeve; 21. stator; 22. impeller; 23. air supply pipeline; 24. scraping bubble mechanism; 25. motor; 26. lever; 27. stainless steel wire rope; 28. large lever; 29. ​​small lever; 30. opening; 31. fixed shaft. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0023] Embodiment 1: Figure 1 As shown, the present invention is a ore dressing and quality improvement process for eclogite-type rutile ore, and the process is as follows: grinding (dry ball milling) → dry magnetic separation {can reduce the processing volume of subsequent ore dressing processes} → grinding wet ball milling (secondary grinding) → (a wet magnetic separation can also be added here, and then part of the ilmenite is removed to reduce the processing volume of subsequent processes) → shaking table gravity separation → flotation → wet magnetic separation.

[0024] Embodiment 2: The difference from Embodiment 1 is that Figures 2 to 3 As shown, the processing steps for reducing the processing volume of subsequent mineral processing steps also include a preliminary mud removal step set between the preliminary dry ball milling and the dry magnetic separation (to reduce the processing volume of the subsequent mineral processing steps, because after a part of the mud or even most of the mud is removed in advance, the processing volume of the subsequent mineral processing steps is reduced, and the mud content of the materials faced by the subsequent mineral processing steps is greatly reduced, so the processing volume of the subsequent mineral processing steps such as flotation and magnetic separation is reduced, and the influence of excessive mud on the equipment used in the subsequent mineral processing steps is avoided, etc.), the mud removal step adopts a mud removal box 1, the bottom plate 2 of the mud removal box is an inclined plate (set at an angle to the horizontal plane), and the bottom plate 2 is provided with a plurality of There are projections 3 arranged at intervals. Since the density of mud is lower than that of ore, a lot of mud is left behind by the projections during the falling process, and the ore continues to move downward until it reaches the discharge port at the bottom of the demudifier (the demudifier 1 is in a rectangular ring shape, with the upper port as the feed port and the lower port as the discharge port 4; a vibration motor 5 can also be fixed on the lower end surface of the bottom plate of the demudifier to prevent the ore from staying on the projections). After preliminary dry ball milling, the ore is put into the demudifier 1, and the ore slides downward along the inclined plate due to its own weight. During the sliding process, it contacts the projections and continues to slide, and the mud on the ore is scraped off by the projections and left behind (the size of the projections can be smaller than the average particle size of the ore after preliminary dry ball milling).

[0025] Embodiment 3: The difference from Embodiment 2 is that Figures 4 to 8 As shown ( Figure 4 The middle dotted line indicates the position of the flexible filter after it is lifted up; for the convenience of illustration, Figure 6 The dotted line indicating that the flexible filter screen is lifted up is removed in the figure), a plurality of rectangular through openings are arranged on the inclined plate, and the height of the through openings is located above the protrusion 3, and a flexible filter screen 6 is arranged at the through openings, and the mesh number on the flexible filter screen is smaller than the average particle size of the ore after preliminary dry ball milling but larger than the average particle size of the mud or sand on the mine (whose particle size is usually between 0.005 mm and 0.0039 mm) so that the mud and sand can pass through the flexible filter screen while the ore cannot pass through, and the length of the flexible filter screen is adapted to the through opening, and the width is larger than the width of the through opening and the width of the flexible filter screen satisfies that when the flexible filter screen 6 is lifted up, its highest point is still located below the highest point of the protrusion, and a cam mechanism 7 is arranged below the flexible filter screen, and the cam mechanism presses the flexible filter screen 6 at intervals, so that the mud and sand scraped off by the protrusion or the mud and sand retained at the protrusion are intermittently shaken up and down, so that the mud and sand are dispersed and pass through the flexible filter screen, and the ore will not pass through due to the setting of the mesh number of the flexible filter screen, so the ore is finally discharged from the discharge port 4. And because the highest point of the flexible filter screen 6 is below the highest point of the protrusion 3 when it is lifted up, it does not affect the protrusion from scraping or contacting the mud and sand on the ore. In the process of the ore sliding down along the inclined plate due to its own weight, the protrusion still plays the role of leaving the mud and sand, and then the intermittent up and down shaking of the flexible filter screen can prevent the mud and sand that stay on the protrusion, especially the place slightly above the height of the protrusion, that is, the upper transition edge 8 between the protrusion and the inclined plate from accumulating and quickly falling through the flexible filter screen. In this way, preliminary mud removal is carried out after preliminary dry ball milling to reduce the processing volume of subsequent mineral processing procedures (such as flotation or magnetic separation) (the impurities in the material in the subsequent processing procedures are reduced a lot due to the preliminary removal of mud). Removing as much mud as possible as early as possible can also ensure that the subsequent processing procedures have a better processing environment, and relatively, since a lot of mud is removed, the amount of material that can be processed in the subsequent processing procedures is relatively increased.

[0026] The cam mechanism includes a bottom plate 9 fixedly connected to the desilting box 1, a cam 10 rotatably arranged on the bottom plate 9, a wheel edge of the cam 10 abuts against an intermediate wheel 11, the intermediate wheel is rotatably arranged on an intermediate wheel seat 12, a push rod 13 is fixedly connected to the intermediate wheel seat, and the push rod 13 is slidably arranged on the bottom plate 9, so that after the cam is driven by the reduction motor to rotate, the push rod intermittently hits the flexible filter screen 6.

[0027] Embodiment 4: The difference from Embodiment 2 is that Fig. 9As shown, the mud removal process adopts the method of passing the mud-containing ore through a flexible sleeve 14. The flexible sleeve 14 is made of non-woven wall cloth. The flexible sleeve is inclined or vertically set (if it is set vertically, the feeding direction is inclined during feeding to ensure that the ore contacts the inner wall surface of the flexible sleeve as much as possible). The flexible sleeve is annular, and the upper opening is used as the feeding port of the mud-containing eclogite-type rutile ore, and the lower opening is used as the discharge port. A cylinder 15 is arranged outside the flexible sleeve, and a top block is arranged on the piston rod of the cylinder 15. The cylinders arranged at intervals along the length direction of the flexible sleeve are used to achieve more contact surfaces when the ore passes through the flexible sleeve, and the wet mud on the ore is stuck to the non-woven wall cloth.

[0028] The flexible sleeve 14 is used to easily stick the wet mud in the mud-containing eclogite-type rutile ore to preliminarily remove a portion of the mud, so as to reduce the processing volume of subsequent mineral processing steps (such as flotation or magnetic separation).

[0029] Non-woven wall cloth: Made of natural fibers such as cotton and linen or synthetic fibers such as polyester and acrylic, it is formed by non-woven molding, resin coating, and printing of colorful patterns. The surface of non-woven wall cloth is smooth and elastic. Therefore, this material can easily stick to the wet mud on the ore, avoiding the dry material like linen, which can stick to the wet mud but also easily hang on the ore. Therefore, the flexible sleeve 14 made of non-woven wall cloth can stick to the wet mud on the ore well, and avoid hanging on the ore, which can effectively remove the wet mud on the ore.

[0030] Embodiment 5: The difference from Embodiment 1 is that Figures 10 to 18 As shown, in the flotation process, the flotation machine is provided with an auxiliary protection mechanism to ensure the continuity and stability of the mineral processing and quality improvement process.

[0031] The flotation machine comprises a flotation tank 16, a driving motor 17 fixed on the outer wall of the flotation tank 16, an impeller shaft 19 connected to the driving motor 17 through a belt transmission mechanism 18, a sleeve 20 fixedly connected to the flotation tank 16 is arranged outside the impeller shaft 19, the lower end of the sleeve 20 is fixedly connected to the stator 21 through bolts, the lower end of the impeller shaft 19 is fixedly connected to the impeller 22 located in the middle of the stator 21, an air supply pipeline 23 is connected to the sleeve 20, and a bubble scraping mechanism 24 and a motor 25 driving the bubble scraping mechanism 24 are also provided on the flotation tank 16. The auxiliary protection mechanism is composed of a lever 26 hinged on the sleeve 20 and a stainless steel wire rope 27 fixedly connected to the lever 26, and the other end of the stainless steel wire rope 27 is fixedly connected to the upper end surface of the stator 21; the bolts are provided in four pieces and are respectively provided at the four corners of the lower end of the sleeve 20, and the levers 26 are provided in four pieces, and the four levers 26 constitute two groups, and the two groups of levers 26 are arranged in a cross and one group is located above the other group. The two levers 26 in each group of levers 26 are one large and one small, and an opening 30 is provided in the middle of the large lever 28 to accommodate the small lever 29. The opening 30 is provided in the middle of the small lever 29 to avoid the sleeve 20 of the impeller shaft 19. The outer wall of the sleeve 20 is fixedly provided with a fixed shaft 31 for rotational connection of the lever 26. There are four fixed shafts 31 and they are arranged opposite to each other; each lever 26 is matched with two stainless steel wire ropes 27, and the two stainless steel wire ropes 27 are fixedly connected to the two ends of the lever 26. The length of one stainless steel wire rope 27 meets the state of being stretched straight after the two ends are fixedly connected, and the length of the other stainless steel wire rope 27 meets the state of being slightly relaxed after the two ends are fixedly connected; the two stainless steel wire ropes 27 matched with the same lever 26 are close to the connection point of the upper end surface of the stator 21.

[0032] The flotation process is as follows: the raw ore pulp is injected, the motor drives the impeller to rotate to generate centrifugal force, the pulp enters between the stator and the impeller, and air is injected into the flotation tank. The pulp in the tank is sucked into the impeller blades from the lower end of the impeller, and is fully mixed with the air and discharged from the upper half of the impeller. After being oriented by the stator, it enters the tank. The stirring effect makes the pulp fully contact with the flotation reagent. The mineral particles change their surface properties by adsorbing the reagent, and then adhere to the rising bubbles to form a mineralized foam layer. The mineralized foam layer is scraped out by the scraper and enters the foam tank, and the medium ore returns to the flotation machine for recirculation.

[0033] Embodiment 6: The difference from Embodiment 5 is that (in Embodiment 5, the two stainless steel wire ropes at the two ends of the same lever will have a certain degree of friction or contact, so this embodiment improves one of the stainless steel wire ropes to avoid the original movement interference or friction and contact of the two stainless steel wire ropes), such as Fig.19As shown, the stainless steel wire rope in the original fifth embodiment is replaced by a stainless steel wire rope group, which includes two parallel stainless steel wire ropes 27, and the two ends of the two stainless steel wire ropes are fixedly connected by a connecting block 32 to form a rectangular ring (to avoid the stainless steel wire rope at the other end of the lever, or not to interfere with the movement of the stainless steel wire rope at the other end of the lever).

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A ore dressing and quality improvement process for eclogite-type rutile ore, characterized in that: The method comprises the following process steps which are performed in sequence: preliminary dry ball milling of eclogite-type rutile ore is used to reduce the processing volume of subsequent mineral processing steps; the remaining concentrate is subjected to a second ball milling step and then subjected to a shaking table gravity separation step to remove mud; the remaining concentrate is subjected to flotation and wet magnetic separation steps to obtain rutile concentrate and ilmenite respectively.

2. A ore dressing and quality upgrading process for eclogite-type rutile ore according to claim 1, characterized in that: The second ball milling process is a wet ball milling process; a wet magnetic separation process is provided between the second ball milling process and the shaking table gravity separation process; The aforementioned processing steps for reducing the processing volume of subsequent mineral processing steps include a dry magnetic separation step after preliminary dry ball milling to magnetically separate part of the ilmenite in the eclogite-type rutile ore.

3. A ore dressing and quality upgrading process for eclogite-type rutile ore according to claim 1 or 2, characterized in that: In the flotation process, an auxiliary protection mechanism is provided on the flotation machine to ensure the continuity and stability of the mineral processing and quality improvement process.

4. A ore dressing and quality upgrading process for eclogite-type rutile ore according to claim 3, characterized in that: The flotation machine includes a flotation tank, a driving motor fixed on the outer wall of the flotation tank, an impeller shaft connected to the driving motor through a belt transmission mechanism, a sleeve fixedly connected to the flotation tank is arranged outside the impeller shaft, the lower end of the sleeve is fixedly connected to the stator through bolts, the lower end of the impeller shaft is fixedly connected to the impeller located in the middle of the stator, an air supply pipeline is connected to the sleeve, and the flotation tank is also provided with a bubble scraping mechanism and a motor driving the bubble scraping mechanism.

5. A ore dressing and quality upgrading process for eclogite-type rutile ore according to claim 4, characterized in that: The auxiliary protection mechanism is composed of a lever hinged on the sleeve and a stainless steel wire rope fixedly connected to the lever, and the other end of the stainless steel wire rope is fixedly connected to the upper end surface of the stator; there are four bolts and they are arranged at the four corners of the lower end of the sleeve, and there are four levers. The four levers form two groups, and the two groups of levers are arranged in a cross shape and one group is located above the other group.

6. A ore dressing and quality upgrading process for eclogite-type rutile ore according to claim 5, characterized in that: The two levers in each lever group are one large and one small, and an opening is provided in the middle of the large lever to accommodate the small lever, and an opening is provided in the middle of the small lever to avoid the sleeve of the impeller shaft, and a fixed shaft for rotating connection of the lever is fixedly provided on the outer wall of the sleeve, and four fixed shafts are provided and arranged opposite to each other; each lever is matched with two stainless steel wire ropes, and the two stainless steel wire ropes are fixedly connected to the two ends of the lever, the length of one stainless steel wire rope is sufficient to be in a straight state after the two ends are fixedly connected, and the length of the other stainless steel wire rope is sufficient to be in a slightly relaxed state after the two ends are fixedly connected; the two stainless steel wire ropes matched with the same lever are close to the connection point with the upper end face of the stator.

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