Beneficiation method for improving utilization rate of rutile ore in leucite

Abstract

The invention discloses a beneficiation method for improving the utilization rate of rutile ore in leucite. The beneficiation method sequentially comprises the following procedures of ore grinding, green color separation, dry high-intensity magnetic separation of color separation concentrate obtained after low-intensity magnetic separation, and flotation of high-intensity magnetic separation tailings to obtain rutile concentrate. And low-intensity magnetic separation is also carried out in the color sorting process. According to the method, most of the omphacite is roughly separated out through color separation, then the rough omphacite ore is further separated subsequently, color separation concentrate is further separated, the method is not like the prior art that the omphacite is separated out through gravity separation, and the method is not like the prior art that raw ore needs to be wetted in the gravity separation procedure; therefore, selection and design of subsequent processing procedures are almost not limited. The design of a sorting scheme can be simplified, and the sorting difficulty is reduced; magnetic separation is carried out while color separation is carried out, the technological process can be greatly simplified, the separation efficiency is improved, and energy consumption is also reduced; the separation and enrichment process can be simplified, the cost is low, and the method is simple and easy to implement.

Description

Technical Field

[0001] The invention relates to a ore dressing method for improving the utilization rate of rutile ore in eclogite. Background Art

[0002] Eclogite-type rutile ore is a mineral resource with high economic value, and its main components are rutile, ilmenite, pyroxene, tremolite, etc. Rutile and ilmenite in eclogite-type rutile resources have high application value, and can be used in the manufacture of high-temperature ceramics, protective coatings, catalysts, electronic materials and other fields. However, the utilization rate of rutile ore is low, mainly because of its low resource grade, fine particle size, complex mineral composition and inter-embedded relationship, resulting in a long and complex mineral processing process. At present, the development of rutile ore mainly adopts a combined process of multiple mineral processing technologies such as gravity separation, magnetic separation, and flotation. Rutile ore is an important mineral raw material for refining titanium metal, and is widely used in aviation, construction, automobiles, life and leisure, medical care, chemical industry, marine development and other fields. Due to its excellent properties such as high temperature resistance, low temperature resistance, corrosion resistance, high strength, and low specific gravity, rutile ore has important applications in military aviation, aerospace, navigation, machinery, chemical industry, and seawater desalination. my country is rich in rutile resources, which are mainly distributed in Hubei, Shanxi, Henan, Shaanxi, Anhui, Jiangsu, Guangdong, Guangxi, Hainan and other provinces. However, due to the fine particle size of useful minerals in rutile ore and its close relationship with iron minerals, it is necessary to adopt a combined gravity and magnetic flotation separation process, resulting in a low degree of development and utilization. In addition, eclogite-type rutile ore is a difficult ore to be separated because the density and magnetic properties of rutile in the ore are relatively small compared with garnet, omphacite and other minerals. Therefore, how to improve the mineral processing method to increase the utilization rate of rutile ore in eclogite is a problem that needs to be solved urgently in this field.

[0003] Yu Shenggen mentioned in his paper “Experimental Study on Comprehensive Utilization of Eclogite-Type Rutile Ore” published in the first issue of “Comprehensive Utilization of Mineral Resources” in February 2012: Eclogite-type rutile ore is a difficult-to-separate ore because the density and magnetic properties of rutile in the ore are relatively small compared with those of garnet, diopside and other minerals… A combined gravity-magnetic-flotation process is adopted… By utilizing the density differences of minerals, the raw ore can not only be effectively enriched with useful minerals such as rutile and garnet through gravity separation, but also non-metallic minerals mainly diopside, which account for nearly half of the total raw ore, can be separated to obtain diopside products, thereby greatly reducing the processing volume of subsequent mineral processing steps and helping to reduce mineral processing costs… From the raw ore, not only a rutile concentrate with a yield of 2.254%, a grade of 86.23% TTiO2, 83.27% rutile TiO2, a recovery rate of 46.18% TTiO2 and 51.82% rutile TiO2 is obtained… The comprehensive utilization rate of minerals is high, and the economic and social benefits are significant. Patent with publication number CN118060058A: A method for recovering rutile from eclogite ore, which adopts crushing, grinding, weak magnetic separation, strong magnetic separation, classification, flotation, gravity separation, refloatation, drying, roasting, regrinding and strong magnetic separation to obtain rutile concentrate and second strong magnetic separation concentrate. Patent with publication number CN118751390A: A method for pre-enrichment of eclogite-type rutile ore, which adopts crushing, grinding, weak magnetic separation, flotation, drying and roasting, regrinding and strong magnetic separation to obtain strong magnetic separation concentrate and rutile rough concentrate. It can be seen that the existing technology does require a very complicated process flow to obtain rutile ore from eclogite. Since eclogite-type rutile ore has three main components: rutile, ilmenite, and diopside, the current processing method basically uses magnetic separation to select ilmenite, gravity separation to separate diopside, and flotation to finally obtain rutile, and the separation is basically carried out in sequence, which reduces the separation efficiency. In addition, the use of a shaking table in gravity separation will make the ore wet, which makes the subsequent processing process of gravity separation have certain limitations.

[0004] In addition, there are many slurry pipes in the ore dressing process, and the bends are very easy to be blocked. For example, the magnetic separator discharges ore at the bottom of the machine body, with limited height difference, and the hose turns easily into a dead angle, which is easy to be blocked by ore sedimentation. Therefore, after gravity separation, magnetic separation will also face the problem of magnetic separator blockage, affecting production efficiency. Summary of the invention

[0005] The object of the present invention is to overcome the defects existing in the prior art and provide a mineral processing method for improving the utilization rate of rutile ore in eclogite. Magnetic separation is carried out simultaneously with color separation, which can greatly simplify the process flow, improve separation efficiency, and reduce energy consumption; it can simplify the separation and enrichment process, and has the advantages of low cost, simple method and easy implementation; the mineral processing method is improved to adopt color separation, and the grinding also adopts dry ball milling. Dry treatment procedures are adopted before strong magnetic separation to avoid the generation of ore pulp and effectively avoid the phenomenon of ore sedimentation and blockage during magnetic separation.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is to design a mineral processing method for improving the utilization rate of rutile ore in eclogite, which is composed of the following steps in sequence: grinding, then green color sorting, the color sorting concentrate after weak magnetic separation is then subjected to dry strong magnetic separation, and then the strong magnetic separation tailings are flotated to obtain rutile concentrate; weak magnetic separation is also provided during the color sorting process. Most of the omphacite is roughly separated by color sorting (because omphacite is mainly green and blue, occasionally yellow or grayish white; while garnet and rutile are mainly red and brown, occasionally black, and yellow, purple, and green are rare), and then the omphacite coarse ore is further sorted, and the color sorting concentrate is further sorted, and unlike the prior art, the omphacite is first separated by gravity selection, and unlike the prior art gravity selection process that requires the original ore to be wetted, there is almost no restriction on the selection and design of subsequent processing steps; the design of the sorting scheme can be simplified and the difficulty of sorting can be reduced; Carrying out magnetic separation at the same time as color sorting can greatly simplify the process flow, improve sorting efficiency, and reduce energy consumption; it can simplify the sorting and enrichment process, and has the advantages of low cost, simple method and easy implementation; The ore dressing method has been improved to color sorting, and dry ball milling is also used for grinding. Dry treatment procedures are adopted before strong magnetic separation to avoid the generation of ore slurry and effectively avoid ore sedimentation and blockage during magnetic separation.

[0007] A further technical solution is to first weigh the color sorting tailings sorted by color sorting, and then decide whether to conduct multi-element analysis and titanium phase analysis of the original ore based on the amount of tailings. If the amount of tailings is large, conduct multi-element analysis and titanium phase analysis of the original ore, and decide whether to conduct further sorting treatment after analysis.

[0008] A further technical solution is that further separation treatment is: gravity separation is performed to separate omphacite from garnet, the gravity separation tailings are omphacite, and the gravity separation concentrate is garnet, and after gravity separation, flotation or magnetic separation is used to separate ilmenite from garnet.

[0009] A further technical solution is that the magnetic separator used in the magnetic separation treatment of the color-sorted tailings after re-selection includes a body, a magnetic separation roller is rotatably arranged on the upper part of the body, and the cavity at the lower part of the body is used as a discharge accumulation cavity. The lower part of the body is located directly below the magnetic separation roller, and the discharge accumulation cavity is in the shape of an inverted cone shell with a large upper part and a small lower part; the magnetic separator is provided with a structure to prevent the magnetic separator from being blocked. After the magnetic separator is improved, it can prevent blocking and ensure the efficiency and effect of magnetic separation.

[0010] A further technical solution is that the structure includes at least two non-magnetic ore discharge ports of the magnetic separator, and a cylinder is arranged at the discharge port, the exposed end of the piston rod of the cylinder is fixedly connected with an elastic dredging rod, and the lower end of the body of the magnetic separator is provided with two discharge channels, the discharge channels are connected with the discharge accumulation cavity, and the lower ports of the two discharge channels serve as discharge ports. The inner wall of the discharge channel is also fixed with a pipe connected with the lower cavity of the body, and an elastic dredging rod is arranged in the pipe. The elastic dredging rod is intermittently dredged by the cylinder that is started alternately to avoid the blockage of the discharge port by the sediment during wet magnetic separation. After such arrangement, there is no need to change the body, the degree of technical transformation is small, and the cost of technical transformation is also low. The position of the concave area is changed by the different openings of the discharge ports arranged side by side and the intermittent change of the opening, which effectively avoids the concave area during magnetic separation and the blockage during magnetic separation.

[0011] In addition to the blockage of the discharge port due to slurry sedimentation, the magnetic separator will also be blocked due to the concave area: the material enters the strip magnetic field channel formed by the roller on the feeding side, and the magnetic ore particles adhere to the roller surface due to magnetic force and are unloaded in the unloading area, thereby realizing the separation of magnetic ore and color separation concentrate (or the separation of garnet ore and rutile ore): because the material to be selected has to pass through a concave lowest point during the separation of magnetic ore particles, the coarse particles in the ore are easily retained and accumulated in this concave area, which eventually leads to the blockage of the magnetic separator.

[0012] The technical solution provided by the present invention is a ore dressing method for improving the utilization rate of rutile ore in eclogite, which is composed of the following steps in sequence: grinding, then green color separation, secondary grinding of the color separation concentrate after weak magnetic separation, and then dry strong magnetic separation, and then flotation of the strong magnetic separation tailings to obtain rutile concentrate; weak magnetic separation is also provided during the color separation process. The purpose of secondary grinding is to obtain magnetic ore particles and non-magnetic ore particles with basically the same particle size when using the dry strong magnetic separation process of the stepped slope magnetic separator.

[0013] The advantages and beneficial effects of the present invention are as follows: most of the omphacite is roughly separated by color sorting (because omphacite is mainly green and blue, occasionally yellow or grayish white; while garnet and rutile are mainly red and brown, occasionally black, and rarely yellow, purple and green), and then the omphacite coarse ore is further sorted, and the color sorted concentrate is further sorted, and unlike the prior art, the omphacite is not separated by gravity selection first, and the gravity selection process of the prior art requires the original ore to be wetted, so there is almost no restriction on the selection and design of the subsequent processing process; the design of the sorting scheme can be simplified, and the difficulty of sorting can be reduced; Carrying out magnetic separation at the same time as color sorting can greatly simplify the process flow, improve sorting efficiency, and reduce energy consumption; it can simplify the sorting and enrichment process, and has the advantages of low cost, simple method and easy implementation; The ore dressing method has been improved to color sorting, and dry ball milling is also used for grinding. Dry treatment procedures are adopted before strong magnetic separation to avoid the generation of ore slurry and effectively avoid ore sedimentation and blockage during magnetic separation.

[0014] After this setting, there is no need to change the machine body, the degree of technical transformation is small, and the cost of technical transformation is also low. The position of the concave area is changed by the different openings of the discharge ports arranged side by side and the intermittent changes in the openings, which effectively avoids the concave area during magnetic separation and avoids blockage during the magnetic separation process.

[0015] In addition to the blockage of the discharge port due to slurry sedimentation, the magnetic separator will also be blocked due to the concave area: the material enters the strip magnetic field channel formed by the roller on the feeding side, and the magnetic ore particles adhere to the roller surface due to magnetic force and are unloaded in the unloading area, thereby realizing the separation of magnetic ore and color separation concentrate (or the separation of garnet ore and rutile ore): because the material to be selected has to pass through a concave lowest point during the separation of magnetic ore particles, the coarse particles in the ore are easily retained and accumulated in this concave area, which eventually leads to the blockage of the magnetic separator.

[0016] The purpose of secondary grinding is to obtain magnetic ore particles and non-magnetic ore particles with basically the same particle size when using the dry high-intensity magnetic separation process of this stepped slope magnetic separator.

[0017] Weighing the color sorting tailings separately before deciding whether to further sort and process them can simplify the processing flow according to the actual situation. If the amount is small, it can be discarded directly to save energy and reduce the complexity of processing. If the amount is large, it can be further processed after analysis. In addition, since the types of items in the color sorting tailings have decreased, the complexity of processing is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a process flow diagram of Embodiment 1 of a ore dressing method for improving the utilization rate of rutile ore in eclogite according to the present invention; Figure 2 is a schematic diagram of a magnetic separator in Embodiment 1 of the present invention; Figure 3 yes Figure 2 Top view after removing the feed box and inlet pipe; Figure 4 yes Figure 3 Bottom view of Figure 5 yes Figure 3 A top view of Figure 6 yes Figure 3 AA section view; Figure 7 yes Figure 6 A partial enlarged schematic diagram of the middle row ore accumulation cavity and its vicinity; Figure 8 yes Figure 2 A schematic diagram from another perspective; Fig. 9 yes Figure 8 The main view; Fig.10 yes Fig. 9 Middle AA section view Fig.11 yes Fig.10 A partial enlarged schematic diagram of the middle row ore accumulation cavity and its vicinity; Fig.12 is a schematic diagram of a second embodiment of the present invention; Fig.13 yes Fig.12 An enlarged schematic diagram of the middle part sorting inclined plate; Fig.14 yes Fig.13 A top view of the combined sorting inclined plate; Fig.15 yes Fig.13 A schematic diagram showing a combined sorting inclined plate behind a magnetic suction cup; Fig.16 yes Fig.13 A schematic diagram showing the ejection trajectories of magnetic and non-magnetic mineral particles; Fig.17 is a schematic diagram of Embodiment 3 of the present invention; Fig.18 yes Fig.17 A partial enlarged schematic diagram of the middle hinged door and its vicinity; Fig.19 yes Fig.17 Schematic diagram of the combined sorting inclined plate in the middle; Fig. 20 yes Fig.19 Top view of the .

[0019] In the figure: 1. body; 2. magnetic separation roller; 3. discharge accumulation cavity; 4. transmission box; 5. drive motor; 6. cylinder; 7. elastic dredging rod; 8. discharge channel; 9. pipeline; 10. concentrate trough; 11. magnetic ore discharge port; 12. hand wheel; 13. bracket; 14. high-pressure water pump; 15. water outlet pipe; 16. frame; 17. motor; 18. spiral auger; 19. feed box; 20. sorting inclined plate; 21. permanent magnet inclined plate; 22. non-magnetic plate; 23. opening; 24. permanent magnet plate; 25. magnetic suction cup; 26. connecting strip; 27. through hole; 28. hinged door; 29. ​​transparent plastic rope; 30. clip. DETAILED DESCRIPTION

[0020] 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.

[0021] Embodiment 1: Figures 1 to 11 As shown, the present invention is a mineral processing method for improving the utilization rate of rutile ore in eclogite, specifically: first grinding the ore, then color sorting (green color sorting), during the color sorting process, weak magnetic separation is also provided (weak magnetic separation is used to remove strong magnetic impurities such as iron; the color sorting concentrate is mainly useful minerals such as garnet and rutile), the color sorting concentrate after weak magnetic separation is further subjected to dry strong magnetic separation (garnet with stronger magnetism is selected to enrich rutile in the strong magnetic separation tailings), and then the strong magnetic separation tailings are floated (the strong magnetic separation tailings are subjected to flotation to obtain rutile concentrate with a TTiO2 grade greater than 85%).

[0022] The coarse ore sorted out by color sorting (i.e., color sorting tailings) is first weighed separately, and then it is decided whether to conduct multi-element analysis and titanium phase analysis of the original ore according to the amount of coarse ore. If the amount of coarse ore is large, multi-element analysis and titanium phase analysis of the original ore are carried out. After the analysis, it is decided whether to conduct further sorting treatment; if further sorting treatment is required, it is carried out, such as gravity separation (for omphacite color sorting tailings containing garnet) to separate omphacite from garnet, the gravity separation tailings are omphacite, and the gravity separation concentrate is garnet. Since the gravity separation concentrate generally contains a small amount of ilmenite (the order of the change of the magnetic properties of minerals from strong to weak is: ilmenite> garnet), flotation or magnetic separation is used to separate the ilmenite from garnet after gravity separation.

[0023] Since garnet has a wide variety of colors, covering the entire spectrum of colors. Common garnet colors include red, purple, dark red, orange, yellow, green, brown, black, etc.; so for the crude ore separated by color sorting whose main component is omphacite (and possibly some garnet ore, etc.), first of all, according to whether the amount of the crude ore separated by color sorting is large or small, if the amount is large, further analysis can be carried out, if the amount is small, this part will be discarded, and after the elemental analysis and titanium phase analysis of the large amount, the color sorted crude ore will be sorted and processed separately; reduce the difficulty and complexity of the existing technical processing process of treating garnet and rutile together with omphacite. And after setting up the mineral processing method in this way, it can be decided whether to carry out further processing according to the actual situation of the sorting process, and the originally complex and multi-component ore can be simplified by this method of processing and analyzing, and the processing becomes simpler and more targeted. ‌ The magnetic separator used in the magnetic separation treatment of color-sorted tailings after re-selection comprises a body 1, a magnetic separation roller 2 is rotatably provided on the upper part of the body, and the cavity in the lower part of the body serves as a discharge accumulation cavity 3. The lower part of the body is located directly below the magnetic separation roller, and the discharge accumulation cavity 3 is in the shape of an inverted cone shell with a larger upper part and a smaller lower part.

[0024] (The roller shaft of the magnetic separation roller is extended out of the body, and the part of the roller shaft outside the body is connected to the drive motor 5 through the transmission box 4) The magnetic separator is provided with at least two non-magnetic ore discharge ports, and a cylinder 6 is provided at the discharge port. The exposed end of the piston rod of the cylinder 6 is fixedly connected with an elastic dredging rod 7 (made of soft rubber material). The lower end of the body of the magnetic separator is provided with two discharge channels 8, which are connected to the lower cavity of the body (that is, the discharge accumulation cavity 3). The lower ports of the two discharge channels 8 serve as discharge ports. A pipe 9 connected to the lower cavity of the body is also fixedly provided on the inner wall of the discharge channel. A An elastic dredging rod 7 is arranged, and the cylinder 6 is started alternately to realize intermittent dredging of the discharge port by the elastic dredging rod, so as to avoid the blockage of the discharge port by ore sedimentation during wet magnetic separation (although the present beneficiation method has been improved, using color separation, dry ball milling and dry magnetic separation, there may be flotation separation, wet magnetic separation and other separation processes for the subsequent treatment of a large amount of coarse ore separated by color separation. Therefore, the further beneficiation process of the color-separated omphacite coarse ore can avoid the problem of ore sedimentation blockage by improving the magnetic separator).

[0025] A concentrate trough 10 connected to the upper part of the machine body is arranged on one side of the lower part of the machine body, a magnetic ore discharge port 11 is arranged at the lower end of the concentrate trough 10, two magnetic ore discharge ports of the magnetic separator are arranged, and a blocking plate is slidably arranged at each discharge port, the blocking plate is rotatably arranged with a wheel rod of a hand wheel 12, one end of the rotating rod rotatably connected with the blocking plate is a smooth section, and a section of the rotating rod away from the blocking plate is a threaded section, and the threaded section of the rotating rod is threadedly connected with a bracket 13 fixedly arranged on one side of the outer side of the machine body; By turning the hand wheel 12, the openings of the two discharge ports are different to avoid the problem that the concave area is always in a fixed position and is prone to blockage; A high-pressure water pump 14 is fixedly arranged on one side outside the lower end of the machine body, and a water outlet pipe 15 of the high-pressure water pump 14 is connected to the upper part of the machine body and arranged facing the magnetic separation roller 2 (for flushing the strong magnetic mineral particles adsorbed on the surface of the magnetic separation roller into the concentrate tank 10 for discharge), and the rotation direction of the magnetic separation roller is from the lower part of the machine body to the concentrate tank.

[0026] After such arrangement, by turning one hand wheel 12 or two hand wheels at intervals, the openings of the two discharge ports are different from those of the previous period, and the position of the concave zone is changed by changing the openings of the discharge ports at intervals; since the position of the concave zone changes frequently, it is difficult for coarse particles in the ore to be retained and deposited at a fixed position (concave zone) and cause blockage of the magnetic separator (i.e., the concave zone changes constantly).

[0027] The handwheel can also be driven by a reduction motor to control the intermittent forward and reverse rotation of the reduction motor to automatically control the rotation direction of the handwheel and the start time of the reduction motor to achieve automatic adjustment of the discharge port opening (automatic change at intervals).

[0028] A frame 16 is fixedly arranged outside the lower part of the machine body, a motor 17 and a reducer are fixedly arranged on the frame, the motor is connected to the reducer, an output shaft of the reducer is fixedly connected with a spiral auger, and the spiral auger 18 extends into the cavity at the lower part of the machine body (to avoid accumulation of non-magnetic ore particles and clogging of the lower part of the machine body).

[0029] When the slurry is transported from the feed box 19 into the magnetic field area, the strongly magnetic minerals therein are adsorbed on the surface of the cylinder (i.e., the magnetic separation roller), the weakly magnetic and non-magnetic minerals are thrown off and discharged (to the discharge channel 8), and the strongly magnetic minerals adsorbed on the surface of the cylinder are taken out of the magnetic field area as the cylinder rotates, and are flushed into the concentrate tank 10 with high-pressure flushing water to complete the sorting operation.

[0030] Embodiment 2: The difference from Embodiment 1 is that Figures 12 to 16 As shown (for ease of illustration, Figure 12 to Figure 14 The magnetic suction cup is not shown, nor are the permanent magnet inclined plate and the combined sorting inclined plate arranged under the combined sorting inclined plate. The color-selected concentrate after weak magnetic separation is subjected to secondary grinding and then dry strong magnetic separation.

[0031] When the color-selected concentrate after weak magnetic separation is subjected to dry strong magnetic separation, a plurality of separation inclined plates 20 are arranged in sequence from top to bottom in the body 1 of the magnetic separator. The slope of the separation inclined plates decreases gradually from top to bottom. The separation inclined plates 20 are connected to the inner wall of the body. The uppermost separation inclined plate is a permanent magnet inclined plate 21 (which is fixedly connected to the inner wall of the body). The remaining separation inclined plates are composed of two plates, one is a permanent magnet plate 24 and the other is a non-magnetic plate 22 (such as a plastic plate with a smooth surface). There is a gap between the permanent magnet plate and the non-magnetic plate. The permanent magnet plate 24 and the non-magnetic plate 22 are located in the same plane to form the separation inclined plate. The gap between the permanent magnet plate and the non-magnetic plate serves as an opening 23 for screening magnetic ore particles. The side edges of the permanent magnet plate 24 and the non-magnetic plate 22 are fixedly connected by connecting strips. The gap between the two connecting strips 26 is the aforementioned opening 23. In addition to the top sorting inclined plate, a permanent magnet inclined plate 21 and a combined sorting inclined plate can be arranged under each sorting inclined plate. The structure of the combined sorting inclined plate is the same as the structure of the aforementioned sorting inclined plate composed of two plates. The two plates of the combined sorting inclined plate are one permanent magnet plate 24 and the other non-magnetic plate 22 (such as a plastic plate with a smooth surface). A gap is provided between the permanent magnet plate and the non-magnetic plate, and the permanent magnet plate and the non-magnetic plate are located in the same plane.

[0032] The upper part of the machine body is made of metal material, and the lower part of the machine body is made of tempered glass (to facilitate observation of the throwing of mineral particles), and two inner and outer magnetic suction cups 25 are arranged at the lower part of the machine body (of course, a number of pairs of magnetic suction cup groups are arranged on both sides of the machine body, each group includes two inner and outer magnetic suction cups; the number of magnetic suction cup groups is consistent with the number of combined sorting inclined plates), and permanent magnets are arranged on the inner and outer suction cups, and the inner and outer suction cups are adsorbed on the wall of the machine body 1 by magnetic force, and the inner and outer magnetic cups are located at the non-magnetic plate 22 of the combined sorting inclined plate and have the same shape as the non-magnetic plate (or slightly smaller in size than the non-magnetic plate to avoid the magnetic suction cup from affecting the magnetic separation process), and the inner suction cup has a side facing the combined sorting inclined plate fixedly connected to the combined sorting inclined plate (that is, the inner suction cup has a side facing the non-magnetic plate of the combined sorting inclined plate fixedly connected to the non-magnetic plate). For easier operation, the width of the combined sorting inclined plate is slightly smaller than the width of the inner cavity of the machine body, so that when moving a pair of magnetic suction cups, there is no need to worry about the combined sorting inclined plate getting stuck on the inner wall of the inner cavity of the machine body when the magnetic suction cups on both sides move slightly out of sync.

[0033] The stepped slope setting allows for multiple sorting, and the sliding speed of the ore particles gradually decreases, which can reduce the situation where some magnetic ore particles are thrown together a long distance due to inertia or being carried out by non-magnetic ore particles and cannot be separated well, thereby improving the magnetic separation efficiency of the technical solution.

[0034] By giving the ore its own power, removing the magnetic separation rollers, and reducing the energy consumption required for mineral separation, the current situation of high energy consumption in mineral separation can be changed. In addition, due to the change in the magnetic separation method, concave areas will no longer exist, effectively avoiding the blockage of the magnetic separator and the problem of affecting production efficiency due to the blockage of the magnetic separator.

[0035] The ore pulp transported from the feed box 19 is tilted and dropped on the slope by the permanent magnet inclined plate for magnetic separation. The magnetic ore particles and non-magnetic ore particles are subjected to different forces in the free-falling process, so they form different trajectories when they fall freely after leaving the slope (i.e., the permanent magnet inclined plate), and are then separated (non-magnetic ore particles are thrown far because they are only subjected to gravity, the support force given by the inclined plate, and the friction force with the inclined plate during the free-falling process; while magnetic ore particles are also subjected to magnetic force, so magnetic ore particles are thrown short); According to the observation that the end of the uppermost permanent magnet inclined plate freely slides and the mineral particles are thrown away from the permanent magnet inclined plate, two kinds of ejection trajectories can be clearly seen (one is closer to the permanent magnet inclined plate due to the magnetic force, and the other is farther away after freely sliding off the permanent magnet inclined plate due to being non-magnetic mineral particles). By moving the position of the outer suction cup, the position of the combined sorting inclined plate is adjusted so that its opening is located on the closer ejection trajectory for collecting magnetic mineral particles, and the inclination of the combined sorting inclined plate is adjusted so that the permanent magnet plate at its lower end is located on the farther ejection trajectory for further sorting (although the mineral particles thrown farther are basically non-magnetic mineral particles, it cannot be ruled out that some magnetic mineral particles are affected by the sliding of non-magnetic mineral particles and are thrown farther together).

[0036] Embodiment 3: The difference from Embodiment 2 is that Figures 17 to 20 As shown (for ease of illustration, Fig.17 The transparent plastic rope is in a non-tensioned state). The remaining sorting inclined plates are composed of three plates located in the same plane, two of which are permanent magnet plates 24 and one is a non-magnetic plate 22. One of the two permanent magnet plates is provided with a plurality of through holes 27 as openings for screening magnetic ore particles. The three plates in the sorting inclined plates are, from top to bottom, a non-magnetic plate, a permanent magnet plate with through holes, and a permanent magnet plate. The magnetic force of the permanent magnet plate with through holes is greater than that of the permanent magnet plate without through holes, so as to absorb the magnetically separated ore particles in the throwing process as much as possible and improve the magnetic separation effect. The permanent magnet plate provided with the through hole is made of a permanent magnet made of a neodymium iron boron material.

[0037] Similar to the second embodiment, in addition to the top sorting inclined plate, a permanent magnet inclined plate and a combined sorting inclined plate can be arranged under each sorting inclined plate. The structure of the combined sorting inclined plate is the same as the structure of the aforementioned sorting inclined plate composed of three plates.

[0038] An outward-opening hinged door 28 is arranged on the upper part of the metal body 1, and transparent plastic ropes 29 are fixedly connected on both sides of the combined sorting inclined plate arranged in the inner cavity of the lower part of the body. The other end of the transparent plastic rope extends out of the hinged door and is located on the outer side of the upper part of the body. A clip 30 is arranged on the transparent plastic rope. The position and inclination degree of the combined sorting inclined plate are fixed by closing the hinged door and clamping the clip 30 on the transparent plastic rope. When adjustment is needed, the transparent plastic rope is held and the hinged door is opened. After adjusting the length of the transparent plastic rope, the hinged door is closed again and the clip is clamped on the part of the exposed transparent plastic rope closest to the hinged door. Two transparent plastic ropes are arranged; one is fixedly connected to the non-magnetic plate of the combined sorting inclined plate, and the other is fixedly connected to the permanent magnet plate of the combined sorting inclined plate.

[0039] There is no need to calculate the speed of the mineral particles leaving the permanent magnet inclined plate and the falling trajectory (there is no need to calculate the initial velocity of the mineral particles, the slope of the permanent magnet inclined plate, the force analysis of the mineral particles, etc.), and the weakening of the sliding speed of the non-magnetic mineral particles by the magnetic mineral particles adsorbed on the permanent magnet inclined plate is also ignored, and there is no need to consider the enhancement of the sliding speed of the non-magnetic mineral particles by the sliding magnetic mineral particles. It is only necessary to bring the permanent magnet plate with through holes of the combined sorting inclined plate as close as possible (but not touching the mineral particles to avoid interference with the mineral particles; the method is generally to observe for a period of time to determine the approximate lowest point of the movement trajectory of the mineral particles that are successively thrown away, and then move the permanent magnet plate with through holes {of course, it is the combined sorting inclined plate, but the permanent magnet plate with through holes of the combined sorting inclined plate is located more in the middle and rear part of the movement trajectory of the thrown mineral particles} lower than the lowest point) to the throwing trajectory (basically a parabola) of the mineral particles to change the movement trajectory of the magnetic mineral particles in the thrown mineral particles to adsorb the magnetically separated mineral particles and fall on the permanent magnet plate with through holes, so that the separation of the magnetic mineral particles in the thrown mineral particles can be completed. The adjustment process of the combined sorting inclined plate does not require a magnetic suction cup as in the second embodiment, does not affect the magnetic separation, and the operation process is simple. The height position and slope of the combined sorting inclined plate can be adjusted by two transparent plastic ropes.

[0040] 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 method for improving the utilization rate of rutile ore in eclogite, characterized in that: The process consists of the following steps: grinding, then green color sorting, the color sorting concentrate after weak magnetic separation is then subjected to dry strong magnetic separation, and then the strong magnetic separation tailings are flotated to obtain rutile concentrate; weak magnetic separation is also provided during the color sorting process.

2. A method for beneficiation of improving the utilization rate of rutile ore in eclogite according to claim 1, characterized in that: The color sorting tailings sorted by color sorting are first weighed, and then the amount of tailings is determined based on whether to conduct multi-element analysis and titanium phase analysis of the original ore. If the amount of tailings is large, multi-element analysis and titanium phase analysis of the original ore are conducted. After the analysis, it is determined whether to conduct further sorting treatment.

3. A ore dressing method for improving the utilization rate of rutile ore in eclogite according to claim 2, characterized in that: The further separation treatment is: gravity separation is performed to separate omphacite from garnet, the gravity separation tailings are omphacite, and the gravity separation concentrate is garnet. After gravity separation, flotation or magnetic separation is used to separate ilmenite from garnet.

4. A method for beneficiation of improving the utilization rate of rutile ore in eclogite according to claim 3, characterized in that: The magnetic separator used in the magnetic separation treatment of color-sorted tailings after re-selection includes a body, a magnetic separation roller is rotatably provided on the upper part of the body, the cavity in the lower part of the body serves as a discharge accumulation cavity, the lower part of the body is located directly below the magnetic separation roller, and the discharge accumulation cavity is in the shape of an inverted cone shell with a larger upper part and a smaller lower part; the magnetic separator is provided with a structure to prevent the magnetic separator from being blocked.

5. A method for beneficiating rutile ore in eclogite according to claim 4, characterized in that: The structure includes at least two non-magnetic ore discharge ports of the magnetic separator, and a cylinder is arranged at the discharge port, the exposed end of the piston rod of the cylinder is fixedly connected with an elastic dredging rod, and two discharge channels are arranged at the lower end of the body of the magnetic separator, the discharge channels are connected with the discharge accumulation cavity, and the lower ends of the two discharge channels serve as discharge ports. A pipe connected with the lower cavity of the body is also fixedly arranged on the inner wall of the discharge channel, and an elastic dredging rod is arranged in the pipe. The elastic dredging rod is used to intermittently dredge the discharge port through the alternately started cylinders, so as to avoid the blockage of ore sedimentation at the discharge port during wet magnetic separation.

6. A method for beneficiating rutile ore in eclogite to improve its utilization rate, characterized in that: The process consists of the following steps: grinding, then green color sorting, secondary grinding of the color sorting concentrate after weak magnetic separation, and then dry strong magnetic separation, and then flotation of the strong magnetic separation tailings to obtain rutile concentrate; weak magnetic separation is also provided during the color sorting process.

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