Beneficiation process for recovering rutile from a garnet ore

Abstract

The present disclosure relates to the technical field of mineral processing, and provides a mineral processing method for recovering rutile from garnetite ore, which comprises the following steps: sequentially crushing, first grinding and low-intensity magnetic separation of the garnetite ore to obtain low-intensity magnetic separation concentrate and low-intensity magnetic separation tailings; first high-intensity magnetic separation of the low-intensity magnetic separation tailings to obtain first high-intensity magnetic separation concentrate and high-intensity magnetic separation tailings; classification of the high-intensity magnetic separation tailings to obtain coarse sand and fine mud; first flotation of the coarse sand to obtain first flotation concentrate and first flotation tailings; gravity separation of the fine mud to obtain pre-concentration concentrate and gravity separation tailings; second flotation of the pre-concentration concentrate to obtain second flotation concentrate and second flotation tailings; drying and roasting of the first flotation concentrate and the second flotation concentrate to obtain roasted concentrate; and sequentially second grinding and second high-intensity magnetic separation of the roasted concentrate to obtain rutile concentrate and second high-intensity magnetic separation concentrate. The mineral processing method of the present disclosure can improve the TiO2 grade and recovery rate of the obtained rutile concentrate, and the method is simple.

Description

Technical Field

[0001] This disclosure relates to the field of mineral processing technology, and for example to a method for recovering rutile from eclogite ore. Background Technology

[0002] In my country, titanium ore mainly exists in the form of vanadium-titanium magnetite, followed by rutile ore. Due to the characteristics of vanadium-titanium magnetite and rutile ore, the comprehensive utilization rate of titanium in vanadium-titanium magnetite is only about 29%. Therefore, achieving efficient development and utilization of rutile is of great significance.

[0003] my country has relatively abundant eclogite-type rutile deposits, with rutile, garnet, and omphacite as the main minerals. However, in eclogite-type rutile deposits, the TiO2 grade of rutile is relatively low, generally around 2% to 4%. Furthermore, rutile has little difference in density and magnetic properties compared to minerals such as garnet and omphacite, making separation difficult. Additionally, iron often substitutes in the rutile lattice in an isomorphous manner, and fine-grained rutile is often encapsulated by garnet, further increasing the difficulty of separating rutile from garnet. Moreover, the intergrowth relationship of rutile with other minerals is complex, and the grain size range is wide. Therefore, compared to other types of rutile deposits, eclogite-type rutile deposits are considered difficult to process.

[0004] Meanwhile, the beneficiation methods for rutile in eclogite ore are mostly quite complex. In particular, when the ore contains a large amount of clay minerals or when rutile is embedded in a fine-grained state, fine grinding is required to liberate the useful mineral rutile. On the other hand, the generation of fine mud will greatly affect the beneficiation and recovery of rutile, resulting in the current low utilization rate of rutile in eclogite ore and the low grade of the obtained concentrate products.

[0005] For example, Chinese patent document CN201110086751.6 discloses a combined production process for partial fractional beneficiation of rutile ore, which adopts a combined process of partial fractional magnetic separation-gravity separation-magnetic separation-desliming and classification-flotation to comprehensively recover and utilize the three main minerals, rutile, garnet and omphacite, in the ore. Using this process, rutile concentrate with a TiO2 grade of 90% and a TiO2 recovery rate of 67.44% can be obtained. However, the process is relatively complex, and this process is designed for eclogite-type rutile ore with a high TiO2 grade (e.g., around 5%).

[0006] In summary, there is an urgent need for a beneficiation method that can effectively recover rutile from complex and difficult-to-process eclogite ores, so that it is not only applicable to eclogite-type rutile ores with low TiO2 grade, but also improves the TiO2 grade and recovery rate of the obtained rutile concentrate, while being simple in method. Summary of the Invention

[0007] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a beneficiation method for recovering rutile from eclogite ore, so as to achieve the effect of being applicable not only to eclogite ore with low TiO2 grade, but also improving the TiO2 grade and recovery rate of the obtained rutile concentrate, while keeping the method simple.

[0008] The purpose of this disclosure is achieved through the following technical solution:

[0009] On the one hand, a beneficiation method for recovering rutile from eclogite ore is provided. The beneficiation method includes: crushing the eclogite ore to obtain crushed ore; subjecting the crushed ore to a first grinding process to obtain a first grinding product; subjecting the first grinding product to weak magnetic separation to obtain a weak magnetic separation concentrate and weak magnetic separation tailings; subjecting the weak magnetic separation tailings to a first strong magnetic separation to obtain a first strong magnetic separation concentrate and strong magnetic separation tailings; classifying the strong magnetic separation tailings to obtain coarse sand and fine mud; wherein the particle size of the coarse sand is larger than the particle size of the fine mud; and subjecting the coarse sand to a first flotation process to obtain a first flotation concentrate. The fine mud is subjected to gravity separation to pre-enrich it, yielding a pre-enriched concentrate and gravity separation tailings. The pre-enriched concentrate is subjected to a second flotation to obtain a second flotation concentrate and a second flotation tailings. The first flotation concentrate and the second flotation concentrate are combined to obtain a flotation concentrate. The flotation concentrate is dried and roasted to obtain a roasted concentrate. The roasted concentrate is subjected to a second grinding to obtain a second grinding product. The second grinding product is subjected to a second strong magnetic separation to obtain rutile concentrate and a second strong magnetic separation concentrate.

[0010] It should be noted that the first flotation tailings, the second flotation tailings, and the gravity separation tailings are combined to obtain rutile tailings.

[0011] In some embodiments, performing a first strong magnetic separation on the weak magnetic separation tailings to obtain a first strong magnetic separation concentrate and strong magnetic separation tailings includes: performing strong magnetic roughing on the weak magnetic separation tailings to obtain a strong magnetic rough concentrate and strong magnetic roughing tailings; performing a third grinding on the strong magnetic rough concentrate to obtain a third grinding product; and performing strong magnetic cleaning on the third grinding product to obtain a first strong magnetic separation concentrate and strong magnetic cleaning tailings; wherein the strong magnetic roughing tailings and the strong magnetic cleaning tailings are combined to obtain the strong magnetic separation tailings.

[0012] In some examples, the first strong magnetic separation is performed using a high-gradient strong magnetic separator or a flat-ring strong magnetic separator.

[0013] In some embodiments, the mass percentage of minerals with a particle size of -0.074 mm in the third grinding product is 80% to 90%.

[0014] In some embodiments, the magnetic field strength of the strong magnetic coarse selection is 6000 to 8000 Oe.

[0015] In some examples, the strong magnetic coarse selection is performed once.

[0016] In some embodiments, the magnetic field strength of the selected strong magnet is 3000 to 5000 Oe.

[0017] In some examples, the strong magnetic selection is performed once.

[0018] In some embodiments, the weak magnetic separation is a wet weak magnetic separation, and the magnetic field strength of the wet weak magnetic separation is 1000-1500 Oe.

[0019] In some embodiments, the calcination is oxidative calcination, the calcination temperature is 800-1000℃, and the calcination time is 2-24h.

[0020] In some examples, the drying is low-temperature drying, the temperature of which is 60 to 100°C, and the drying time is 2 to 4 hours.

[0021] In some embodiments, the magnetic field strength of the second strong magnetic separator is 3000 to 5000 Oe.

[0022] In some embodiments, the particle size of the crushed ore is -3 mm.

[0023] In some examples, the crushing is carried out using a rod mill.

[0024] In some embodiments, the mass percentage of minerals with a particle size of -0.074 mm in the first grinding product is 30% to 50%.

[0025] In some embodiments, the coarse sand has a particle size of +0.038 mm, and the fine mud has a particle size of -0.038 mm.

[0026] In some examples, the grading is performed using a high-frequency vibrating screen and a hydrocyclone.

[0027] In some of the examples above, the grading can be accurately achieved at a finer particle size by using a combination of the high-frequency vibrating screen and the hydrocyclone.

[0028] In some examples, the reseparation is carried out using a high-speed centrifugal concentrator or a vibrating cone separator.

[0029] In some of the examples above, using the high-speed centrifugal concentrator or the suspended cone separator for gravity separation can improve the recovery of fine-grained heavy minerals compared to other equipment.

[0030] In some embodiments, the mass percentage of minerals with a particle size of -0.038 mm in the second grinding product is greater than or equal to 85%.

[0031] In some embodiments, the first flotation and the second flotation each include flotation roughing, flotation sweeping, and flotation cleaning; wherein the flotation roughing is performed once, the flotation sweeping is performed 1 to 2 times, and the flotation cleaning is performed 2 to 4 times.

[0032] In some embodiments, the reagents used in the first flotation and the reagents used in the second flotation each include one of lead nitrate and lead acetate, water glass, sodium fluorosilicate, and fatty acid collectors; wherein the fatty acid collectors include sodium oleate, oxidized paraffin soap, 5-9-hydroxyoxime acid, benzylarsine, and styrenephosphonic acid.

[0033] In some of the above embodiments, by using sodium oleate, oxidized paraffin soap, 5-9-hydroxyoxime acid, benzylarsonic acid, and styrenephosphonic acid as fatty acid collectors, the selective collection ability of the fatty acid collectors can be improved.

[0034] In some examples, the mass ratio of sodium oleate, the oxidized paraffin soap, the 5-9-hydroxyoxime acid, the benzylarsonic acid, and the styrenephosphonic acid is 2:5:1:1:1.

[0035] In some of the examples above, by limiting the mass ratio of the sodium oleate, the oxidized paraffin soap, the 5-9-hydroxyoxime acid, the benzylarsonic acid, and the styrenephosphonic acid, the selective collection ability of the fatty acid collector can be further improved.

[0036] In some examples, in either the first flotation or the second flotation, the amount of one of lead nitrate and lead acetate is 200–1000 g / t·feed, the amount of water glass is 100–500 g / t·feed, the amount of sodium fluorosilicate is 500–2000 g / t·feed, and the amount of fatty acid collector is 500–1000 g / t·feed.

[0037] In some embodiments, the TiO2 grade in the eclogite ore is 1.5% to 4.0%.

[0038] It should be noted that the eclogite ore exhibits chloritization, sericitization, and clay alteration characteristics, and the rutile grain size is uneven, making it a complex and difficult-to-process eclogite-type rutile ore.

[0039] The principle of the mineral processing method disclosed herein includes: First, the eclogite ore is crushed and ground to obtain feed material (i.e., the first grinding product); second, the feed material is subjected to weak magnetic separation and strong magnetic separation for magnetic tailings removal, and the tailings product (i.e., the strong magnetic separation tailings) is classified to obtain coarse sand and fine mud; then, the coarse sand is subjected to flotation to recover rutile, obtaining a portion of rutile rough concentrate (i.e., the first flotation concentrate); and the fine mud is subjected to gravity separation for pre-enrichment, and the pre-enriched concentrate is subjected to second flotation to obtain another portion of rutile rough concentrate (i.e., the second flotation concentrate); finally, the first flotation concentrate and the second flotation concentrate are combined for roasting, second grinding, and second strong magnetic separation to obtain the rutile concentrate.

[0040] It is worth noting that the mineral processing method provided in this disclosure is applicable to eclogite ores with complex ore properties, and has the advantages of wide applicability and good comprehensive recovery effect. It can effectively recover rutile from complex and difficult-to-process eclogite ores to obtain high-quality rutile concentrate, providing a new approach for the efficient development and utilization of this difficult-to-utilize resource, eclogite-type rutile, thereby improving my country's utilization rate of rutile resources. This is of great significance for alleviating my country's dependence on imports of high-quality titanium raw materials such as rutile high-grade titanium concentrate. Furthermore, the mineral processing method is simple, environmentally friendly, easy to control, and convenient for widespread application.

[0041] The beneficial effects of this disclosure are:

[0042] 1. The present disclosure provides a beneficiation method for recovering rutile from eclogite ore, which is applicable to eclogite ore with low TiO2 grade and has the advantages of wide applicability and good comprehensive recovery effect.

[0043] 2. The present disclosure provides a mineral processing method for recovering rutile from eclogite ore. The process is simple, environmentally friendly, easy to control, and easy to promote and apply. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual process of the methods involved in the embodiments of this disclosure.

[0045] Figure 1 This disclosure provides a process flow diagram of a mineral processing method for recovering rutile from eclogite ore. Detailed Implementation

[0046] The technical solutions in some embodiments of this disclosure will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments provided in this disclosure, all other embodiments obtained by those skilled in the art are within the scope of protection of this disclosure.

[0047] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0048] In describing some embodiments, the expression "A and / or B" may be used. It is readily understood that "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0049] In describing some embodiments, the expressions "at least one of A, B and C" and "at least one of A, B or C" may be used, both of which have the same meaning and include the following combinations of A, B and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B and C.

[0050] Example 1

[0051] This embodiment provides a mineral processing method for recovering rutile from eclogite ore. The eclogite ore has a TiO2 grade of 3.14%, and the quantitative results of its main minerals are shown in Table 1.

[0052] Table 1. Main mineral composition and content of the raw ore composite sample

[0053] content(%) 39.01 27.39 8.00 7.56 5.33 1.82 1.59 Mineral Name calcite Kaolinite Potassium feldspar Epidote chlorite Sphene apatite content(%) 1.20 0.76 0.70 0.68 1.12 0.52 0.35 Mineral Name muscovite Rutile ilmenite magnetite chromite Pyrrhotite Chalcopyrite content(%) 0.28 2.53 0.54 0.15 0.04 0.02 0.01

[0054] like Figure 1 As shown, the mineral processing method includes:

[0055] S1. Crush the eclogite ore (i.e., the raw ore) to a particle size of -3mm to obtain crushed ore;

[0056] S2. The crushed ore was ground using a rod mill to obtain grinding product 1 with a grinding fineness of -0.074 mm accounting for 40%;

[0057] S3. The grinding product 1 is subjected to wet weak magnetic separation with a magnetic field strength of 1250 Oe to obtain weak magnetic separation concentrate and weak magnetic separation tailings.

[0058] S4. A high-gradient magnetic separator is used to perform one strong magnetic roughing on the weak magnetic separation tailings, with a magnetic field strength of 7000 Oe, to obtain strong magnetic roughing concentrate and strong magnetic roughing tailings.

[0059] S5. Grind the high-intensity magnetic separation rough concentrate to obtain grinding product 2 with a grinding fineness of -0.074 mm accounting for 80%;

[0060] S6. A high-gradient magnetic separator is used to perform one strong magnetic separation on the grinding product 2, with a magnetic field strength of 4000 Oe, to obtain strong magnetic concentrate 1 and strong magnetic tailings; wherein, the strong magnetic roughing tailings and the strong magnetic separation tailings are combined into strong magnetic tailings.

[0061] S7. A combination of high-frequency vibrating screen and hydrocyclone is used to classify the tailings of strong magnetic separation by particle size to obtain coarse sand with a particle size of +0.038mm and fine mud with a particle size of -0.038mm.

[0062] S8. The coarse sand is subjected to flotation, including one roughing flotation, two scavenging flotation, and two cleaning flotation to obtain flotation tailings 1 and flotation concentrate 1; wherein, the reagents used for flotation include lead nitrate 800g / t·feed, water glass 300g / t·feed, sodium fluorosilicate 1500g / t·feed, and fatty acid collector 700g / t·feed; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentanediol oxime acid, benzylarsine acid, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0063] S9. Use a high-speed centrifugal concentrator to perform gravity separation on fine mud for pre-enrichment, and obtain pre-enriched concentrate and gravity separation tailings;

[0064] S10. The pre-enriched concentrate is subjected to flotation, including one roughing flotation, one scavenging flotation, and four cleaning flotation to obtain flotation concentrate 2 and flotation tailings 2; wherein, flotation concentrate 1 and flotation concentrate 2 are combined into flotation concentrate; flotation tailings 1, flotation tailings 2 and gravity separation tailings are combined into rutile tailings; the reagents used for flotation include 500 g / t lead nitrate per ore feed, 500 g / t water glass per ore feed, 1500 g / t sodium fluorosilicate per ore feed, and 500 g / t fatty acid collector per ore feed; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentanediol oxime acid, benzylarsine acid and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0065] S11. The flotation concentrate is dried at a low temperature of 80℃ for 2 hours, and then oxidized and roasted at 900℃ for 2 hours to obtain roasted concentrate.

[0066] S12. The roasted concentrate is ground to a fineness of -0.038 mm or more, accounting for more than 85%, to obtain grinding product 3;

[0067] S13. The grinding product 3 is subjected to strong magnetic separation with a magnetic field strength of 4000 Oe to obtain rutile concentrate and strong magnetic separation concentrate 2.

[0068] The results show that the beneficiation method in this embodiment finally yielded rutile concentrate with a yield of 2.45%, a TiO2 grade of 92.53%, and a TiO2 recovery rate of 72.20%, achieving effective recovery of rutile from eclogite ore.

[0069] Example 2

[0070] This embodiment provides a mineral processing method for recovering rutile from eclogite ore. The eclogite ore has a TiO2 grade of 2.15%, and the quantitative results of its main minerals are shown in Table 2.

[0071] Table 2. Main mineral composition and content of the raw ore composite sample

[0072] content(%) 25.21 14.67 10.83 4.90 27.75 0.04 3.99 Mineral Name calcite Rutile ilmenite magnetite chlorite Sphene muscovite content(%) 2.36 1.78 0.45 0.31 1.39 0.34 1.82 Mineral Name talc Pyrite Zircon apatite content(%) 0.03 0.03 0.03 0.80

[0073] like Figure 1 As shown, the mineral processing method includes:

[0074] S1. Crush the eclogite ore (i.e., the raw ore) to a particle size of -3mm to obtain crushed ore;

[0075] S2. The crushed ore was ground using a rod mill to obtain grinding product 1 with a grinding fineness of -0.074 mm accounting for 50%;

[0076] S3. The grinding product 1 is subjected to wet weak magnetic separation with a magnetic field strength of 1500 Oe to obtain weak magnetic separation concentrate and weak magnetic separation tailings.

[0077] S4. A high-gradient magnetic separator is used to perform one strong magnetic roughing on the weak magnetic separation tailings, with a magnetic field strength of 8000 Oe, to obtain strong magnetic roughing concentrate and strong magnetic roughing tailings.

[0078] S5. Grind the high-intensity magnetic separation rough concentrate to obtain grinding product 2 with a grinding fineness of -0.074 mm accounting for 90%;

[0079] S6. A high-gradient magnetic separator is used to perform one strong magnetic separation on the grinding product 2, with a magnetic field strength of 5000 Oe, to obtain strong magnetic concentrate 1 and strong magnetic tailings; wherein, the strong magnetic roughing tailings and the strong magnetic separation tailings are combined into strong magnetic tailings.

[0080] S7. A combination of high-frequency vibrating screen and hydrocyclone is used to classify the tailings of strong magnetic separation by particle size to obtain coarse sand with a particle size of +0.038mm and fine mud with a particle size of -0.038mm.

[0081] S8. The coarse sand is subjected to flotation, including one roughing flotation, two scavenging flotation, and three cleaning flotation to obtain flotation tailings 1 and flotation concentrate 1; wherein, the reagents used for flotation include lead acetate 800g / t·feed, water glass 400g / t·feed, sodium fluorosilicate 1800g / t·feed, and fatty acid collector 600g / t·feed; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentanediol oxime acid, benzylarsine acid, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0082] S9. Use a high-speed centrifugal concentrator to perform gravity separation on fine mud for pre-enrichment, and obtain pre-enriched concentrate and gravity separation tailings;

[0083] S10. The pre-enriched concentrate is subjected to flotation, including one roughing flotation, one scavenging flotation, and four cleaning flotation to obtain flotation concentrate 2 and flotation tailings 2; wherein, flotation concentrate 1 and flotation concentrate 2 are combined into flotation concentrate; flotation tailings 1, flotation tailings 2 and gravity separation tailings are combined into rutile tailings; the reagents used for flotation include lead acetate 600g / t·feed, water glass 500g / t·feed, sodium fluorosilicate 1200g / t·feed, and fatty acid collector 600g / t·feed; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentanediol oxime acid, benzylarsine acid and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0084] S11. The flotation concentrate is dried at a low temperature of 60℃ for 4 hours, and then oxidized and roasted at 1000℃ for 2 hours to obtain roasted concentrate.

[0085] S12. The roasted concentrate is ground to a fineness of -0.038 mm or more, accounting for more than 85%, to obtain grinding product 3;

[0086] S13. The grinding product 3 is subjected to strong magnetic separation with a magnetic field strength of 4000 Oe to obtain rutile concentrate and strong magnetic separation concentrate 2.

[0087] The results show that the beneficiation method in this embodiment finally yielded rutile concentrate with a yield of 1.64%, a TiO2 grade of 91.42%, and a TiO2 recovery rate of 69.73%, achieving effective recovery of rutile from eclogite ore.

[0088] Example 3

[0089] This embodiment provides a mineral processing method for recovering rutile from eclogite ore. The eclogite ore has a TiO2 grade of 3.96%, and the quantitative results of its main minerals are shown in Table 3.

[0090] Table 3. Main mineral composition and content of the raw ore composite sample

[0091] content(%) 26.42 12.64 10.32 4.86 25.34 0.12 3.64 Mineral Name calcite Rutile ilmenite magnetite chlorite Sphene muscovite content(%) 2.72 3.16 1.22 0.34 2.36 0.52 1.36 Mineral Name talc Pyrite Zircon apatite content(%) 0.02 0.03 0.05 0.82

[0092] like Figure 1 As shown, the mineral processing method includes:

[0093] S1. Crush the eclogite ore (i.e., the raw ore) to a particle size of -3mm to obtain crushed ore;

[0094] S2. The crushed ore was ground using a rod mill to obtain grinding product 1 with a grinding fineness of -0.074 mm accounting for 30%;

[0095] S3. The grinding product 1 is subjected to wet weak magnetic separation with a magnetic field strength of 1000 Oe to obtain weak magnetic separation concentrate and weak magnetic separation tailings.

[0096] S4. A flat-ring type high-intensity magnetic separator is used to perform one high-intensity magnetic roughing on the weak magnetic separation tailings. The magnetic field strength is 6000 Oe, to obtain high-intensity magnetic rough concentrate and high-intensity magnetic roughing tailings.

[0097] S5. Grind the high-intensity magnetic separation rough concentrate to obtain grinding product 2 with a grinding fineness of -0.074 mm accounting for 80%;

[0098] S6. A flat-ring type high-intensity magnetic separator is used to perform one high-intensity magnetic separation on the grinding product 2, with a magnetic field strength of 3000 Oe, to obtain high-intensity magnetic concentrate 1 and high-intensity magnetic separation tailings; wherein, the high-intensity magnetic roughing tailings and the high-intensity magnetic separation tailings are combined into high-intensity magnetic separation tailings.

[0099] S7. A combination of high-frequency vibrating screen and hydrocyclone is used to classify the tailings of strong magnetic separation by particle size to obtain coarse sand with a particle size of +0.038mm and fine mud with a particle size of -0.038mm.

[0100] S8. The coarse sand is subjected to flotation, including one roughing flotation, two scavenging flotation, and two cleaning flotation to obtain flotation tailings 1 and flotation concentrate 1; wherein, the reagents used for flotation include lead nitrate 1000g / t·feed, water glass 500g / t·feed, sodium fluorosilicate 1000g / t·feed, and fatty acid collector 1000g / t·feed; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentanediol oxime acid, benzylarsine acid, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0101] S9. A suspended vibrating cone separator is used to pre-enrich fine mud by gravity separation to obtain pre-enriched concentrate and gravity separation tailings;

[0102] S10. The pre-enriched concentrate is subjected to flotation, including one roughing flotation, two scavenging flotation, and four cleaning flotation to obtain flotation concentrate 2 and flotation tailings 2; wherein, flotation concentrate 1 and flotation concentrate 2 are combined into flotation concentrate; flotation tailings 1, flotation tailings 2 and gravity separation tailings are combined into rutile tailings; the reagents used for flotation include 800 g / t feed of lead nitrate, 200 g / t feed of water glass, 1000 g / t feed of sodium fluorosilicate, and 700 g / t feed of fatty acid collectors; the fatty acid collectors include sodium oleate, oxidized paraffin soap, pentanediol oxime acid, benzylarsine, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0103] S11. The flotation concentrate is dried at a low temperature of 100℃ for 2 hours, and then oxidized and roasted at 1000℃ for 2 hours to obtain roasted concentrate.

[0104] S12. The roasted concentrate is ground to a fineness of -0.038 mm or more, accounting for more than 85%, to obtain grinding product 3;

[0105] S13. The grinding product 3 is subjected to strong magnetic separation with a magnetic field strength of 4000 Oe to obtain rutile concentrate and strong magnetic separation concentrate 2.

[0106] The results show that the beneficiation method in this embodiment finally yielded rutile concentrate with a yield of 3.18%, a TiO2 grade of 92.21%, and a TiO2 recovery rate of 74.05%, achieving effective recovery of rutile from eclogite ore.

[0107] Comparative Example 1

[0108] Comparative Example 1 and Example 2 are compared; wherein, Comparative Example 1 uses the same raw ore as Example 2, and the difference between Comparative Example 1 and Example 2 is that: Comparative Example 1 adopts the mineral processing method of Example 1 in Chinese Patent Document CN201310610574.6.

[0109] The results showed that the beneficiation method in Comparative Example 1 ultimately yielded a rutile concentrate with a yield of 1.38%, a TiO2 grade of 85.12%, and a TiO2 recovery rate of 54.64%. This indicates that, compared to the beneficiation method in Example 2, the beneficiation method in Comparative Example 1 significantly reduced the recovery of rutile from the raw ore. This demonstrates that beneficiation methods for other types of rutile ores are not suitable for the complex and refractory eclogite-type rutile ore disclosed in this invention.

[0110] Comparative Example 2

[0111] Comparative Example 2 is compared with Example 2; wherein, Comparative Example 2 uses the same raw ore as Example 2, and the difference between Comparative Example 2 and Example 2 is that: Comparative Example 2 adopts the mineral processing method of the embodiment in Chinese patent document CN201110086751.6.

[0112] The results showed that the beneficiation method in Comparative Example 2 ultimately yielded a rutile concentrate with a yield of 1.45%, a TiO2 grade of 82.45%, and a TiO2 recovery rate of 55.60%. Therefore, for recovering rutile from eclogite ore, compared to the beneficiation method in Comparative Example 2, the beneficiation method in Example 2 achieves better recovery results with a simpler method and a lower TiO2 grade in the raw ore.

[0113] Comparative Example 3

[0114] Comparative Example 3 is compared with Example 3; wherein, Comparative Example 3 uses the same raw ore as Example 3, and the difference between Comparative Example 3 and Example 3 is that: Comparative Example 3 adopts the mineral processing method of Example 1 in Chinese Patent Document CN201310610574.6.

[0115] The results showed that the beneficiation method in Comparative Example 3 ultimately yielded a rutile concentrate with a yield of 2.42%, a TiO2 grade of 86.57%, and a TiO2 recovery rate of 52.90%. This indicates that, compared to the beneficiation method in Example 3, the beneficiation method in Comparative Example 3 significantly reduced the recovery of rutile from the raw ore. This demonstrates that beneficiation methods for other types of rutile ores are not suitable for the complex and refractory eclogite-type rutile ores disclosed in this invention.

[0116] Comparative Example 4

[0117] Comparative Example 4 is compared with Example 3; wherein, Comparative Example 4 uses the same raw ore as Example 3, and the difference between Comparative Example 4 and Example 3 is that: Comparative Example 4 adopts the mineral processing method of the embodiment in Chinese Patent Document CN201110086751.6.

[0118] The results showed that the beneficiation method in Comparative Example 4 ultimately yielded a rutile concentrate with a yield of 2.67%, a TiO2 grade of 83.45%, and a TiO2 recovery rate of 56.27%. Therefore, for recovering rutile from eclogite ore, the beneficiation method in Example 3 achieves better recovery results compared to the beneficiation method in Comparative Example 4, even with a simpler method and a lower TiO2 grade in the raw ore.

[0119] Therefore, the beneficiation method for recovering rutile from eclogite ore provided in this disclosure not only achieves the effect of being applicable to eclogite ore with low TiO2 grade, but also improving the TiO2 grade and recovery rate of the obtained rutile concentrate, while the method is simple.

[0120] The above description is merely a preferred embodiment of this disclosure. It should be understood that this disclosure is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this disclosure should be within the protection scope of the appended claims.

Claims

1. A beneficiation method for recovering rutile from eclogite ore, characterized in that, include: The eclogite ore is crushed to obtain crushed ore; The crushed ore is subjected to a first grinding process to obtain a first grinding product; The first grinding product is subjected to weak magnetic separation to obtain weak magnetic concentrate and weak magnetic tailings. The weak magnetic separation tailings are subjected to a first strong magnetic separation to obtain a first strong magnetic separation concentrate and strong magnetic separation tailings; the weak magnetic separation tailings are subjected to strong magnetic roughing to obtain a strong magnetic separation rough concentrate and strong magnetic roughing tailings; the strong magnetic separation rough concentrate is subjected to a third grinding to obtain a third grinding product; the third grinding product is subjected to strong magnetic cleaning to obtain a first strong magnetic separation concentrate and strong magnetic cleaning tailings; wherein, the strong magnetic roughing tailings and the strong magnetic cleaning tailings are combined to obtain the strong magnetic separation tailings; The tailings from the strong magnetic separation are classified to obtain coarse sand and fine mud; wherein the particle size of the coarse sand is larger than that of the fine mud. The coarse sand is subjected to a first flotation to obtain a first flotation concentrate and a first flotation tailings; The fine mud is subjected to gravity separation for pre-enrichment to obtain pre-enriched concentrate and gravity separation tailings; The pre-enriched concentrate is subjected to a second flotation to obtain a second flotation concentrate and a second flotation tailings; The first flotation concentrate and the second flotation concentrate are combined to obtain a flotation concentrate; The flotation concentrate is dried and roasted to obtain roasted concentrate. The roasted concentrate is subjected to a second grinding process to obtain a second grinding product; and The second grinding product is subjected to a second strong magnetic separation to obtain rutile concentrate and a second strong magnetic separation concentrate.

2. The mineral processing method according to claim 1, characterized in that, The mass percentage of minerals with a particle size of -0.074 mm in the third grinding product is 80%~90%. And / or, the magnetic field strength of the strong magnetic coarse selection is 6000~8000 Oe; And / or, the magnetic field strength of the selected strong magnet is 3000~5000 Oe.

3. The mineral processing method according to claim 1, characterized in that, The weak magnetic separation is a wet weak magnetic separation, and the magnetic field strength of the wet weak magnetic separation is 1000~1500 Oe.

4. The mineral processing method according to claim 1, characterized in that, The calcination is oxidative calcination, the calcination temperature is 800~1000℃, and the calcination time is 2~24 h.

5. The mineral processing method according to claim 1, characterized in that, The magnetic field strength of the second strong magnetic separator is 3000~5000 Oe.

6. The mineral processing method according to claim 1, characterized in that, The particle size of the crushed ore is -3 mm; And / or, the mass percentage of minerals with a particle size of -0.074 mm in the first grinding product is 30% to 50%; And / or, the coarse sand has a particle size of +0.038 mm, and the fine mud has a particle size of -0.038 mm; And / or, the mass percentage of minerals with a particle size of -0.038 mm in the second grinding product is greater than or equal to 85%.

7. The mineral processing method according to claim 1, characterized in that, The first flotation and the second flotation each include flotation roughing, flotation sweeping, and flotation cleaning; The number of times the flotation roughing is performed is 1, the number of times the flotation sweeping is performed is 1 to 2, and the number of times the flotation cleaning is performed is 2 to 4.

8. The mineral processing method according to claim 1, characterized in that, The reagents used in the first flotation and the reagents used in the second flotation each include one of lead nitrate and lead acetate, water glass, sodium fluorosilicate, and fatty acid collectors; The fatty acid collectors include sodium oleate, oxidized paraffin soap, 5-9-hydroxyoxime acid, benzylarsine, and styrenephosphonic acid.

9. The mineral processing method according to any one of claims 1 to 8, characterized in that, The TiO2 grade in the eclogite ore is 1.5% to 4.0%.

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