Short-process comprehensive recovery process for leucite-type rutile

Abstract

The invention discloses a leucite-type rutile short-process comprehensive recovery process, which comprises the following steps: crushing leucite-type rutile, carrying out first ore grinding, screening and desliming to obtain a floating material; carrying out full-size-fraction flotation on the floating materials to obtain flotation concentrate and flotation tailings; carrying out secondary ore grinding on the flotation concentrate, drying and roasting to obtain roasted concentrate, and carrying out primary strong magnetic separation to obtain rutile concentrate and a magnetic product; performing second high-intensity magnetic separation on the flotation tailings to obtain second high-intensity magnetic separation concentrate and second high-intensity magnetic separation tailings; the second strong magnetic separation concentrate is subjected to first gravity separation, garnet concentrate, first gravity separation middlings and first gravity separation tailings are obtained, and the first gravity separation middlings are returned to the second strong magnetic separation; the first gravity separation tailings and the second gravity separation concentrates are combined into rough omphacite concentrates; and the rough omphacite concentrate is subjected to third gravity separation, and omphacite concentrate, third gravity separation middlings and third gravity separation tailings are obtained. The method is suitable for the leucite type rutile ore, and efficient separation of the rutile can be achieved to obtain high-quality concentrate.

Description

Technical Field

[0001] The invention relates to the technical field of mineral processing, in particular to a short-process comprehensive recovery process of eclogite-type rutile. Background Art

[0002] As the demand for titanium resources continues to grow with industrial development, rutile is an important raw material for high-quality titanium. Most of my country's natural rutile ores are primary ores. Due to their low grade, fine embedded particle size, complex ore properties, and small difference in surface properties with gangue, my country's natural rutile resources are difficult to be effectively developed and utilized, resulting in my country's high dependence on imports of high-end titanium raw materials such as rutile high-quality titanium concentrate. Therefore, it is of great significance to achieve efficient development and utilization of rutile.

[0003] my country is rich in eclogite-type rutile deposits, whose primary minerals are rutile, garnet, and omphacite. However, the TiO2 grade of rutile in eclogite-type rutile is low, generally around 2% to 4%, with some even below 2%. Furthermore, the density and magnetic properties of rutile differ slightly from those of minerals such as garnet and omphacite, making separation difficult. Furthermore, iron often undergoes isomorphic substitution in the rutile lattice, often encapsulating fine-grained rutile within garnet, further complicating the separation of rutile and garnet. Furthermore, rutile exhibits complex intercalation with other minerals and an uneven particle size distribution, with a high concentration of fine particles and high levels of primary and secondary fine mud, significantly impacting flotation. Consequently, the current utilization rate of rutile from eclogite ores is low, resulting in low-grade concentrates. Therefore, compared with other types of rutile ores, eclogite-type rutile ores are even more difficult to separate using a single process, and it is also difficult to obtain rutile concentrate with higher grade and recovery rate.

[0004] The beneficiation methods for eclogite-type rutile ores are mostly complicated. In actual production, it is usually necessary to adopt a combination of multiple processes to recover rutile. According to the differences in density, magnetism, etc. between rutile and gangue, classification or gravity separation tailings are generally used for pretreatment to remove muddy and light minerals. Then magnetic separation is used for quality improvement, and then flotation or graded flotation is used to obtain rutile coarse concentrate, and finally acid washing and roasting are used to remove impurities. The commonly used beneficiation method in my country is the process of magnetic gravity combination-graded flotation-acid washing and impurity removal. The beneficiation process is complicated, the production cost is high, the recovery cycle is long, and the comprehensive recovery degree is low, which brings obstacles to the recycling and utilization of rutile resources.

[0005] For example, Chinese patent CN201110086751.6 discloses a combined production process for partial particle size separation of rutile ore, which adopts a combined process of partial particle size separation-gravity separation-magnetic separation-desliming classification-flotation to comprehensively recover and utilize the three main minerals of rutile, garnet and omphacite in the ore; using this process, a rutile concentrate with a TiO2 grade of 90.04% and a TiO2 recovery rate of 67.44% can be obtained, a garnet concentrate with a yield of 26.74% and a garnet content of 88.5% and an omphacite concentrate with a yield of 34.44% and a omphacite content of 89.0% can be obtained; however, the process flow of this process is relatively complicated, and the process is targeted at eclogite-type rutile ores with a higher TiO2 grade (for example, around 5%). Chinese patent CN202410050339.6 discloses a beneficiation method for recovering rutile from eclogite ore. The application mainly uses a magnetic separation method combined with a flotation method to screen rutile, performs weak magnetic separation, performs strong magnetic separation on the weak magnetic separation tailings, classifies the strong magnetic separation tailings, and performs a first flotation on the obtained coarse sand. After multiple pre-enrichment concentrates and re-selection tailings, rutile concentrate and a second magnetic separation concentrate are finally obtained. However, the application process is relatively cumbersome and is used for eclogite-type rutile ores with relatively complex compositions, and the comprehensive recovery efficiency is low.

[0006] In summary, there is an urgent need for a short-process comprehensive recovery process for eclogite-type rutile, which is not only suitable for complex eclogite ores with low TiO2 grade, but also can obtain rutile concentrate with good mineral processing indicators in a shorter process, while achieving the comprehensive recovery and utilization of associated minerals garnet and diopside. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a short-process comprehensive recovery process for eclogite-type rutile, so that it is not only suitable for complex eclogite ores with low TiO2 grade, but also can obtain rutile concentrate with good mineral processing indicators in a shorter process, while achieving the effect of comprehensive recovery and utilization of associated minerals garnet and diopside.

[0008] The object of the present invention is achieved through the following technical solutions:

[0009] The short-process comprehensive recovery process of eclogite-type rutile includes the following steps:

[0010] crushing the eclogite-type rutile to obtain crushed ore;

[0011] performing a first grinding on the crushed ore to obtain a first grinding product;

[0012] Screening and desludging the first grinding product to obtain fine mud and floating material;

[0013] flotation of the floating material to obtain flotation concentrate and flotation tailings;

[0014] performing a second grinding on the flotation concentrate to obtain a second grinding product;

[0015] drying and roasting the second grinding product to obtain a roasted concentrate;

[0016] The roasted concentrate is subjected to a first high-intensity magnetic separation to obtain a rutile concentrate and a magnetic product;

[0017] The flotation tailings are subjected to a second high-intensity magnetic separation to obtain a second high-intensity magnetic separation concentrate and a second high-intensity magnetic separation tailings;

[0018] The second high-intensity magnetic separation concentrate is subjected to the first gravity separation to obtain garnet concentrate, the first gravity separation middling and the first gravity separation tailings, and the first gravity separation middling is returned to the second high-intensity magnetic separation;

[0019] combining the first gravity separation tailings and the second gravity separation concentrate to form a coarse omphacite concentrate;

[0020] The omphacite coarse concentrate is subjected to a third gravity separation to obtain an omphacite concentrate, a third gravity separation middling and a third gravity separation tailing. The third gravity separation middling is returned to the first gravity separation, and the third gravity separation tailing is returned to the second gravity separation.

[0021] Specifically, the crushing includes performing primary crushing on the eclogite-type rutile to obtain medium-crushed ore; and performing secondary crushing on the medium-crushed ore to obtain crushed ore;

[0022] Preferably, the particle size of the crushed ore is -3 mm; the particle size of the medium-crushed ore is -12.00 mm;

[0023] Specifically, the primary crushing can be performed using a jaw crusher, and the secondary crushing can be performed using a high pressure roller mill;

[0024] Preferably, the mass percentage of minerals with a particle size of -0.074 mm in the first grinding product is 50% to 70%;

[0025] Specifically, “the mass percentage of the mineral with a particle size of -0.074 mm in the first grinding product is 50% to 70%” and “the grinding fineness of the first grinding product is -0.074 mm, which accounts for 50% to 70%” have the same meaning;

[0026] Specifically, the first grinding can be performed using a rod mill.

[0027] Preferably, the particle size of the sieve desludging is +0.013 mm, and the particle size of the fine mud is -0.013 mm;

[0028] Specifically, the screening and desludging is carried out using a high-frequency vibrating screen and a hydrocyclone;

[0029] By adopting the combination of the high-frequency vibrating screen and the hydrocyclone to perform the classification, classification with finer particle size can be achieved accurately.

[0030] Specifically, the number of flotation roughing selections is 1 to 2 times, the number of flotation sweeping selections is 0 to 1 time, and the number of flotation cleaning selections is 2 to 4 times;

[0031] Preferably, the reagents used in the full-size flotation each include one of lead nitrate and lead acetate, sodium fluorosilicate, diesel and a fatty acid collector;

[0032] Preferably, the fatty acid collector comprises one of sodium oleate, oxidized paraffin soap, pentahydroxamic acid, benzyl arsenic acid and styrenephosphonic acid;

[0033] Specifically, the mass ratio of the sodium oleate, the oxidized paraffin soap, the nonahydroxamic acid, the benzyl arsenic acid and the styrenephosphonic acid is 2:5:1:1:1.

[0034] By adopting the sodium oleate, the oxidized paraffin soap, the nonahydroxamic acid, the benzyl arsenic acid and the styrenephosphonic acid as the fatty acid collector, the selective capture ability of the fatty acid collector can be improved; based on this, by limiting the mass ratio of the sodium oleate, the oxidized paraffin soap, the nonahydroxamic acid, the benzyl arsenic acid and the styrenephosphonic acid, the selective capture ability of the fatty acid collector can be further improved.

[0035] Preferably, in the full-size flotation, the amount of one of the lead nitrate and the lead acetate is 400-1000 g / t of feed ore, the amount of the sodium fluorosilicate is 1500-3000 g / t of feed ore, the amount of the diesel is 30-80 g / t of feed ore, and the amount of the fatty acid collector is 1000-2000 g / t of feed ore.

[0036] Preferably, the mass percentage of minerals with a particle size of -0.038 mm in the second ground product is greater than or equal to 60%.

[0037] Specifically, the second grinding can be performed using a rod mill;

[0038] Specifically, the full-size flotation includes flotation roughing, flotation sweeping and flotation cleaning;

[0039] Preferably, the drying comprises low-temperature drying, the temperature of the low-temperature drying is 60-100° C., and the time of the low-temperature drying is 2-4 hours;

[0040] Drying the flotation concentrate can facilitate the subsequent roasting; on this basis, by limiting the drying conditions, it is possible to prevent the flotation concentrate from changing in properties while ensuring the drying effect.

[0041] Preferably, the calcination includes oxidation calcination, the temperature of the oxidation calcination is 700-1000° C., and the time of the oxidation calcination is 1-4 hours.

[0042] The roasting can remove impurities such as sulfur, phosphorus, and iron in the flotation concentrate, thereby improving the quality of the rutile rough concentrate; on this basis, in the above embodiment, by limiting the conditions of the roasting, the impurity removal effect can be improved, thereby further improving the quality of the rutile rough concentrate.

[0043] Preferably, the magnetic field strength of the first strong magnetic separation is 300-600 kA / m;

[0044] Specifically, the first high-intensity magnetic separation includes wet high-intensity magnetic separation;

[0045] Specifically, the wet high-intensity magnetic separation can be carried out using a high-gradient high-intensity magnetic separator or a flat-ring high-intensity magnetic separator;

[0046] The strong magnetic separation can separate rutile and associated minerals according to the magnetic difference between them, thereby further purifying the roasted concentrate; on this basis, by limiting the magnetic field intensity of the strong magnetic separation, the separation effect can be improved, thereby further improving the purification effect.

[0047] Preferably, the magnetic field strength of the second strong magnetic separation is 400-700 kA / m;

[0048] Specifically, the second high-intensity magnetic separation includes wet high-intensity magnetic separation;

[0049] Specifically, the wet high-intensity magnetic separation is carried out using a high-gradient high-intensity magnetic separator or a flat-ring high-intensity magnetic separator;

[0050] The strong magnetic separation can separate garnet and omphacite in the flotation tailings according to the magnetic difference; on this basis, the separation effect can be improved by limiting the magnetic field intensity of the strong magnetic separation.

[0051] Specifically, the gravity selection is carried out using a shaking table or a spiral chute;

[0052] Specifically, the number of roughing operations in the first gravity separation is 1; the number of re-separation operations of the first gravity separation is 1 to 2;

[0053] Specifically, the number of roughing selections in the second gravity separation is 1; the number of re-selection of the ore in the second gravity separation is 1 to 2;

[0054] Specifically, the third reselection rough selection is performed once; the third reselection fine selection is performed 2 to 3 times;

[0055] The gravity separation can separate garnet, omphacite and gangue minerals according to the difference in specific gravity between them, thereby further purifying the second strong magnetic concentrate and the second strong magnetic tailings; on this basis, by limiting the number of stages of the gravity separation, the separation effect can be improved, thereby further improving the purification effect.

[0056] Specifically, the second high-intensity magnetic separation concentrate is subjected to a first gravity separation to obtain a garnet concentrate, a first gravity separation middling and a first gravity separation tailings, and the first gravity separation middling is returned to the second high-intensity magnetic separation, comprising:

[0057] (1) performing gravity roughing on the second high-intensity magnetic separation concentrate to obtain gravity roughing concentrate, gravity roughing middling and gravity roughing tailings;

[0058] (2) performing gravity separation and concentration on the gravity roughing ore to obtain gravity separation concentrate, first gravity separation ore and gravity separation tailings;

[0059] (3) the gravity rougher concentrate and the gravity cleaned concentrate are combined to obtain the garnet concentrate, and the gravity rougher tailings and the gravity cleaned tailings are combined to obtain the first gravity tailings;

[0060] (4) returning the first gravity separation ore to the second high-intensity magnetic separation.

[0061] Specifically, the second high-intensity magnetic separation tailings are subjected to second gravity separation to obtain second gravity separation concentrate, second gravity separation middlings and total tailings, and the second gravity separation middlings are returned to the second high-intensity magnetic separation, comprising:

[0062] (1) performing gravity roughing on the second strong magnetic separation tailings to obtain gravity roughing concentrate, gravity roughing middling and gravity roughing tailings;

[0063] (2) performing gravity separation and concentration on the gravity roughing ore to obtain gravity separation concentrate, secondary gravity separation ore and gravity separation tailings;

[0064] (3) The gravity rougher concentrate and the gravity cleaned concentrate are combined to obtain the double gravity concentrate, and the gravity rougher tailings and the gravity cleaned tailings are combined to obtain the total tailings;

[0065] (4) returning the second gravity separation ore to the second high-intensity magnetic separation.

[0066] Specifically, the omphacite coarse concentrate is subjected to a third gravity separation to obtain an omphacite concentrate, a third gravity separation middling and a third gravity separation tailing, the third gravity separation middling is returned to the first gravity separation, and the third gravity separation tailing is returned to the second gravity separation, comprising:

[0067] (1) performing gravity roughing on the omphacite coarse concentrate to obtain gravity roughing concentrate, gravity roughing middling and gravity roughing tailings;

[0068] (2) performing two-stage gravity separation on the gravity rougher concentrate to obtain the omphacite concentrate, gravity separation middlings and gravity separation tailings;

[0069] (3) wherein the gravity rougher middlings and the gravity concentrated middlings are combined to obtain the third gravity concentrated middlings, and the gravity rougher tailings and the gravity concentrated tailings are combined to obtain the third gravity concentrated tailings;

[0070] (4) returning the third reselection mineral to the first reselection;

[0071] (5) Returning the third gravity separation tailings to the second gravity separation.

[0072] Specifically, the grade of TiO2 in the eclogite ore is 1.5% to 4.0%.

[0073] The principle of the present application includes: first, the first grinding product is obtained by performing the crushing and the first grinding on the eclogite-type rutile ore; the first grinding product is subjected to the screening and desliming to perform tailings discarding, and the product obtained by tailings discarding (i.e., the flotation material) is subjected to the full-size flotation to recover rutile to obtain the flotation concentrate; second, the rutile concentrate is obtained by performing the second grinding, the drying, the roasting and the first high-intensity magnetic separation on the flotation concentrate; third, the second high-intensity magnetic separation is performed on the flotation tailings to obtain the second high-intensity magnetic separation concentrate and the second high-intensity magnetic separation tailings, the second high-intensity magnetic separation concentrate is subjected to the first gravity separation to obtain garnet concentrate, the first gravity separation middling and the first gravity separation tailings, the second high-intensity magnetic separation tailings are subjected to the second gravity separation to obtain the second gravity separation concentrate, the second gravity separation middling and the total tailings; finally, the omphacite coarse concentrate is subjected to the third gravity separation to obtain the omphacite concentrate, the third gravity separation middling and the third gravity separation tailings.

[0074] The mineral processing process can achieve monomer dissociation of minerals through the crushing and the first grinding. On this basis, the screening and desliming can remove a large amount of primary and secondary fine mud generated by weathering and fine grinding of the eclogite-type rutile ore, thereby eliminating the adverse effects of the fine mud on the flotation process. Then, the rutile can be further enriched through full-size flotation. Then, the second grinding and the roasting can remove impurities such as sulfur, phosphorus, and iron. Finally, the first high-intensity magnetic separation can be used to further separate and remove impurities, thereby obtaining the rutile concentrate with better quality. For the flotation tailings, the second high-intensity magnetic separation can be used to preliminarily separate the co-existing garnet and omphacite based on the magnetic difference of the minerals. On this basis, the first gravity separation is performed on the second magnetic separation concentrate, and it can be sorted based on the specific gravity difference of the minerals, thereby obtaining the garnet concentrate with better quality. The second gravity separation is performed on the second magnetic separation tailings to obtain the omphacite coarse concentrate. Finally, the third gravity separation can be used to further separate and remove impurities from the omphacite coarse concentrate, thereby obtaining the omphacite concentrate with better quality.

[0075] The beneficial effects of the present invention are:

[0076] 1. The short-process comprehensive recovery process for eclogite-type rutile provided in the present disclosure is applicable to low-grade rutile ores such as eclogite-type rutile ores with complex ore properties and difficult to select. It can achieve efficient separation of rutile to obtain high-quality concentrate, and has the advantages of wide applicability and good recovery effect.

[0077] 2. The short-process comprehensive recovery process for eclogite-type rutile provided in the present disclosure can simplify the rutile sorting process, and has the advantages of low cost, simple method and easy implementation, which is convenient for promotion and application. While reducing costs, it shortens the recovery cycle and improves the comprehensive recovery degree.

[0078] 3. The short-process comprehensive recovery process for eclogite-type rutile provided in the present disclosure can efficiently and comprehensively recover co-existing minerals, thereby obtaining garnet concentrate and omphacite concentrate with high grade and recovery rate, thereby maximizing the utilization of this type of rutile resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 This is the process flow chart of the short-process comprehensive recovery process of eclogite-type rutile in this application. DETAILED DESCRIPTION

[0080] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0081] Example 1

[0082] This embodiment provides a short-process comprehensive recovery process for eclogite-type rutile to recover rutile from an eclogite ore. The TiO2 grade in the eclogite ore is 3.14%, and the quantitative results of its main minerals are shown in Table 1.

[0083] Table 1 Main mineral composition and content of raw ore comprehensive sample

[0084] Mineral name Almandine Ophote plagioclase quartz Hornblende Diopside biotite content(%) 39.01 27.39 8.00 7.56 5.33 1.82 1.59 Mineral name calcite Kaolinite Potassium feldspar Epidote Chlorite titanite 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

[0085] like Figure 1 As shown, the mineral processing method includes:

[0086] S1. Crushing the eclogite ore (raw ore) to a particle size of -3 mm to obtain crushed ore;

[0087] S2. The crushed ore was ground using a rod mill to obtain a grinding fineness of -0.074mm, accounting for 59.52% of the grinding product 1;

[0088] S3 using a high-frequency vibrating screen to screen the grinding product 1 desludging, to obtain a particle size of + 0.013mm into the floating material and a particle size of -0.013mm fine mud;

[0089] S4. flotation of the floating material, including two flotation roughing operations, zero flotation scavenging operations, and three flotation cleaning operations, to obtain flotation tailings and flotation concentrate; wherein the flotation reagents used include 530 g / t of lead nitrate, 2350 g / t of sodium fluorosilicate, 1250 g / t of fatty acid collector, and 53 g / t of diesel; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentahydroxamic acid, benzyl arsenic acid, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0090] S5. The flotation concentrate is ground to obtain a grinding fineness of -0.038mm accounting for 70% of the grinding product 2;

[0091] S6 The grinding product 2 was dried at low temperature at 80 ° C for 2 h, and then oxidized and roasted at 800 ° C for 2 h to obtain a roasted concentrate;

[0092] S7. Using a high gradient magnetic separator to separate the roasted concentrate, the magnetic field strength is 477.5kA / m to obtain rutile concentrate and magnetic products;

[0093] S8. Using a high gradient magnetic separator to separate the flotation tailings, the magnetic field strength is 557.0kA / m to obtain a strong magnetic concentrate and strong magnetic tailings;

[0094] S9. A shaking table is used to perform a gravity roughing of the strong magnetic concentrate to obtain a gravity roughing concentrate 1, a gravity roughing ore 1 and a gravity roughing tailing 1;

[0095] S10. The gravity rougher ore 1 is subjected to a gravity separation and concentration process using a shaking table to obtain a gravity separation concentrate 1, a gravity separation ore 1, and a gravity separation tailing 1; the gravity rougher concentrate 1 and the gravity separation concentrate 1 are combined to obtain a gravity separation concentrate 1 (i.e., a garnet concentrate); the gravity rougher tailing 1 and the gravity separation tailing 1 are combined to obtain a gravity separation tailing 1; and the gravity separation ore 1 is returned to the second high-intensity magnetic separation;

[0096] S11. A shaking table is used to perform a gravity roughing of the strong magnetic tailings to obtain a gravity roughing concentrate 2, a gravity roughing ore 2 and a gravity roughing tailings 2;

[0097] S12. The gravity rougher ore 2 is subjected to a gravity separation and concentration process using a shaking table to obtain a gravity separation concentrate 2, a gravity separation ore 2, and a gravity separation tailing 2; the gravity rougher concentrate 2 is combined with the gravity separation concentrate 2 to obtain a gravity separation concentrate 2, and the gravity rougher tailing 2 is combined with the gravity separation tailing 2 to obtain a gravity separation tailing 2 (i.e., the total tailings); the gravity separation ore 2 is returned to the second high-intensity magnetic separation;

[0098] S13. Combining the gravity separation tailings 1 and the gravity separation concentrate 2 into a coarse omphacite concentrate;

[0099] S14. A shaker is used to perform a gravity roughing of the omphacite coarse concentrate to obtain a gravity roughing concentrate 3, a gravity roughing ore 3 and a gravity roughing tailing 3;

[0100] S15. The gravity rougher concentrate 3 is subjected to two gravity separations using a shaking table to obtain a gravity concentrated concentrate 3 (i.e., omphacite concentrate), a gravity concentrated middling 3, and a gravity concentrated tailing 3; the gravity rougher middling 3 is combined with the gravity concentrated middling 3 to obtain a gravity concentrated middling 3, and the gravity rougher tailing 3 is combined with the gravity concentrated tailing 3 to obtain a gravity concentrated tailing 3; the gravity concentrated middling 3 is returned to the first gravity separation; and the gravity concentrated tailing 3 is returned to the second gravity separation;

[0101] The results show that the mineral processing method of this embodiment finally obtains rutile concentrate with a TiO2 grade of 90.45% and a TiO2 recovery rate of 72.02%, garnet concentrate with a yield of 26.74% and a garnet content of 89.09%, and omphacite concentrate with a yield of 32.17% and a omphacite content of 71.87%, realizing the efficient comprehensive utilization of rutile and associated minerals in eclogite ore.

[0102] Example 2

[0103] This embodiment provides a short-process comprehensive recovery process for eclogite-type rutile to recover rutile from an eclogite ore. The TiO2 grade in the eclogite ore is 2.15%, and the quantitative results of its main minerals are shown in Table 2.

[0104] Table 2 Main mineral composition and content of raw ore comprehensive sample

[0105] Mineral name Garnet Ophote plagioclase quartz Hornblende dolomite biotite content(%) 25.21 14.67 10.83 4.90 27.75 0.04 3.99 Mineral name calcite Rutile ilmenite magnetite Chlorite titanite 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

[0106] like Figure 1 As shown, the mineral processing method includes:

[0107] S1. Crushing the eclogite ore (raw ore) to a particle size of -3 mm to obtain crushed ore;

[0108] S2. The crushed ore was ground using a rod mill to obtain a grinding fineness of -0.074mm, accounting for 68.89% of the grinding product 1;

[0109] S3 using a high-frequency vibrating screen to screen the grinding product 1 desludging, to obtain a particle size of + 0.013mm into the floating material and a particle size of -0.013mm fine mud;

[0110] S4. flotation of the floating material, including two roughing flotation steps, one scavenging flotation step, and four cleaning flotation steps, to obtain flotation tailings and flotation concentrate; wherein the flotation reagents used include 580 g / t of lead nitrate, 2510 g / t of sodium fluorosilicate, 1300 g / t of fatty acid collector, and 53 g / t of diesel; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentahydroxamic acid, benzyl arsenic acid, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0111] S5. The flotation concentrate is ground to obtain a grinding fineness of -0.038mm accounting for 70% of the grinding product 2;

[0112] S6 the grinding product 2 low temperature drying, temperature of 80 ℃, time for 2h, and then oxidizing roasting, temperature of 800 ℃, time for 2.5h, to obtain a roasted concentrate;

[0113] S7. Using a high gradient magnetic separator to separate the roasted concentrate, the magnetic field strength is 477.5kA / m to obtain rutile concentrate and magnetic products;

[0114] S8. Using a high gradient magnetic separator to separate the flotation tailings, the magnetic field strength is 557.0kA / m to obtain a strong magnetic concentrate and strong magnetic tailings;

[0115] S9. A shaking table is used to perform a gravity roughing of the strong magnetic concentrate to obtain a gravity roughing concentrate 1, a gravity roughing ore 1 and a gravity roughing tailing 1;

[0116] S10. The gravity rougher ore 1 is subjected to a gravity separation and concentration process using a shaking table to obtain a gravity separation concentrate 1, a gravity separation ore 1, and a gravity separation tailing 1; the gravity rougher concentrate 1 and the gravity separation concentrate 1 are combined to obtain a gravity separation concentrate 1 (i.e., a garnet concentrate); the gravity rougher tailing 1 and the gravity separation tailing 1 are combined to obtain a gravity separation tailing 1; and the gravity separation ore 1 is returned to the second high-intensity magnetic separation;

[0117] S11. A shaking table is used to perform a gravity roughing of the strong magnetic tailings to obtain a gravity roughing concentrate 2, a gravity roughing ore 2 and a gravity roughing tailings 2;

[0118] S12. The gravity rougher ore 2 is subjected to a gravity separation and concentration process using a shaking table to obtain a gravity separation concentrate 2, a gravity separation ore 2, and a gravity separation tailing 2; the gravity rougher concentrate 2 is combined with the gravity separation concentrate 2 to obtain a gravity separation concentrate 2, and the gravity rougher tailing 2 is combined with the gravity separation tailing 2 to obtain a gravity separation tailing 2 (i.e., the total tailings); the gravity separation ore 2 is returned to the second high-intensity magnetic separation;

[0119] S13. Combining the gravity separation tailings 1 and the gravity separation concentrate 2 into a coarse omphacite concentrate;

[0120] S14. A shaker is used to perform a gravity roughing of the omphacite coarse concentrate to obtain a gravity roughing concentrate 3, a gravity roughing ore 3 and a gravity roughing tailing 3;

[0121] S15. The gravity rougher concentrate 3 is subjected to two gravity separations using a shaking table to obtain a gravity concentrated concentrate 3 (i.e., omphacite concentrate), a gravity concentrated middling 3, and a gravity concentrated tailing 3; the gravity rougher middling 3 is combined with the gravity concentrated middling 3 to obtain a gravity concentrated middling 3, and the gravity rougher tailing 3 is combined with the gravity concentrated tailing 3 to obtain a gravity concentrated tailing 3; the gravity concentrated middling 3 is returned to the first gravity separation; and the gravity concentrated tailing 3 is returned to the second gravity separation;

[0122] The results show that the mineral processing method of this embodiment finally obtains rutile concentrate with a TiO2 grade of 91.42% and a TiO2 recovery rate of 68.77%, garnet concentrate with a yield of 22.59% and a garnet content of 88.06%, and omphacite concentrate with a yield of 29.04% and a omphacite content of 68.91%, realizing the efficient comprehensive utilization of rutile and associated minerals in eclogite ore.

[0123] Example 3

[0124] This embodiment provides a short-process comprehensive recovery process for eclogite-type rutile to recover rutile from an eclogite ore. The TiO2 grade in the eclogite ore is 3.96%, and the quantitative results of its main minerals are shown in Table 3.

[0125] Table 3 Main mineral composition and content of raw ore comprehensive sample

[0126] Mineral name Garnet Ophote plagioclase quartz Hornblende dolomite biotite content(%) 26.42 12.64 10.32 4.86 25.34 0.12 3.64 Mineral name calcite Rutile ilmenite magnetite Chlorite titanite 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

[0127] like Figure 1 As shown, the mineral processing method includes:

[0128] S1. Crushing the eclogite ore (raw ore) to a particle size of -3 mm to obtain crushed ore;

[0129] S2. The crushed ore was ground using a rod mill to obtain a grinding fineness of -0.074mm, accounting for 65.23% of the grinding product 1;

[0130] S3 using a high-frequency vibrating screen to screen the grinding product 1 desludging, to obtain a particle size of + 0.013mm into the floating material and a particle size of -0.013mm fine mud;

[0131] S4. The flotation material is subjected to flotation, including two roughing flotation operations, one scavenging flotation operation, and three concentrating flotation operations to obtain flotation tailings and flotation concentrates; wherein the flotation reagents used include 470 g / t of lead nitrate, 2100 g / t of sodium fluorosilicate, 1200 g / t of fatty acid collector, and 53 g / t of diesel; the fatty acid collector includes sodium oleate, oxidized paraffin soap, pentahydroxamic acid, benzyl arsenic acid, and styrenephosphonic acid in a mass ratio of 2:5:1:1:1;

[0132] S5. The flotation concentrate is ground to obtain a grinding fineness of -0.038mm accounting for 70% of the grinding product 2;

[0133] S6 The grinding product 2 was dried at low temperature at 80 ° C for 2 h, and then oxidized and roasted at 800 ° C for 2 h to obtain a roasted concentrate;

[0134] S7. Using a high gradient magnetic separator to separate the roasted concentrate, the magnetic field strength is 477.5kA / m to obtain rutile concentrate and magnetic products;

[0135] S8. Using a high gradient magnetic separator to separate the flotation tailings, the magnetic field strength is 557.0kA / m to obtain a strong magnetic concentrate and strong magnetic tailings;

[0136] S9. A shaking table is used to perform a gravity roughing of the strong magnetic concentrate to obtain a gravity roughing concentrate 1, a gravity roughing ore 1 and a gravity roughing tailing 1;

[0137] S10. The gravity rougher ore 1 is subjected to a gravity separation and concentration process using a shaking table to obtain a gravity separation concentrate 1, a gravity separation ore 1, and a gravity separation tailing 1; the gravity rougher concentrate 1 and the gravity separation concentrate 1 are combined to obtain a gravity separation concentrate 1 (i.e., a garnet concentrate); the gravity rougher tailing 1 and the gravity separation tailing 1 are combined to obtain a gravity separation tailing 1; and the gravity separation ore 1 is returned to the second high-intensity magnetic separation;

[0138] S11. A shaking table is used to perform a gravity roughing of the strong magnetic tailings to obtain a gravity roughing concentrate 2, a gravity roughing ore 2 and a gravity roughing tailings 2;

[0139] S12. The gravity rougher ore 2 is subjected to a gravity separation and concentration process using a shaking table to obtain a gravity separation concentrate 2, a gravity separation ore 2, and a gravity separation tailing 2; the gravity rougher concentrate 2 is combined with the gravity separation concentrate 2 to obtain a gravity separation concentrate 2, and the gravity rougher tailing 2 is combined with the gravity separation tailing 2 to obtain a gravity separation tailing 2 (i.e., the total tailings); the gravity separation ore 2 is returned to the second high-intensity magnetic separation;

[0140] S13. Combining the gravity separation tailings 1 and the gravity separation concentrate 2 into a coarse omphacite concentrate;

[0141] S14. A shaker is used to perform a gravity roughing of the omphacite coarse concentrate to obtain a gravity roughing concentrate 3, a gravity roughing ore 3 and a gravity roughing tailing 3;

[0142] S15. The gravity rougher concentrate 3 is subjected to two gravity separations using a shaking table to obtain a gravity concentrated concentrate 3 (i.e., omphacite concentrate), a gravity concentrated middling 3, and a gravity concentrated tailing 3; the gravity rougher middling 3 is combined with the gravity concentrated middling 3 to obtain a gravity concentrated middling 3, and the gravity rougher tailing 3 is combined with the gravity concentrated tailing 3 to obtain a gravity concentrated tailing 3; the gravity concentrated middling 3 is returned to the first gravity separation; and the gravity concentrated tailing 3 is returned to the second gravity separation;

[0143] The results show that the mineral processing method of this embodiment finally obtains rutile concentrate with a TiO2 grade of 92.21% and a TiO2 recovery rate of 74.15%, garnet concentrate with a yield of 23.28% and a garnet content of 88.73%, and omphacite concentrate with a yield of 30.46% and a omphacite content of 70.54%, realizing the efficient comprehensive utilization of rutile and associated minerals in eclogite ore.

[0144] Comparative Example 1

[0145] Comparative Example 1 is compared with Example 1; wherein, Comparative Example 1 uses the same raw ore as Example 1, and the difference between Comparative Example 1 and Example 1 is that Comparative Example 1 uses the mineral processing process of Example 1 in Chinese patent document CN201310610574.6.

[0146] The results show that the beneficiation method of Comparative Example 1 ultimately produced a rutile concentrate with a TiO2 grade of 87.82% and a TiO2 recovery rate of 61.40%. This indicates that the beneficiation method of Comparative Example 1 significantly degrades the recovery of rutile from the raw ore compared to the beneficiation method of Example 2, demonstrating that beneficiation processes for other types of rutile ores are not suitable for the complex and difficult-to-separate eclogite-type rutile ore disclosed herein.

[0147] Comparative Example 2

[0148] 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 uses the mineral processing process of the embodiment in Chinese patent document CN201110086751.6.

[0149] The results show that the beneficiation method of Comparative Example 2 ultimately produced a rutile concentrate with a TiO2 grade of 82.45% and a TiO2 recovery rate of 55.60%, a garnet concentrate with a yield of 21.32% and a garnet content of 84.66%, and a omphacite concentrate with a yield of 30.27% and an omphacite content of 66.20%. It can be seen that for the recovery of rutile from eclogite ore, compared with the beneficiation method of Comparative Example 2, the beneficiation process of Example 2 can achieve better recovery effects when the TiO2 grade in the original ore is lower.

[0150] Comparative Example 3

[0151] Comparative Example 3 is compared with Example 1; wherein, Comparative Example 3 uses the same raw ore as Example 1, and the difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses the mineral processing process of the embodiment in Chinese patent document CN202011318967.6.

[0152] The results show that the beneficiation method of Comparative Example 2 ultimately produced a rutile concentrate with a TiO2 grade of 89.55% and a TiO2 recovery rate of 48.31%, a garnet concentrate with a yield of 27.82% and a garnet content of 80.13%, and a omphacite concentrate with a yield of 17.45% and an omphacite content of 70.17%. It can be seen that for the recovery of rutile from eclogite ore, compared with the beneficiation method of Comparative Example 3, the beneficiation process of Example 1 can achieve better recovery effects while greatly simplifying the method.

[0153] Therefore, the short-process comprehensive recovery process of eclogite-type rutile provided by the present invention is at least applicable not only to complex eclogite ores with low TiO2 grade, but also can obtain rutile concentrate with good mineral processing indicators in a shorter process, while achieving the comprehensive recovery and utilization of associated minerals garnet and diopside.

[0154] The foregoing description is merely a preferred embodiment of the present disclosure. It should be understood that the present disclosure is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present disclosure is applicable to various other combinations, modifications, and environments and can be modified within the scope of the concepts described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present disclosure are intended to be protected by the claims appended hereto.

Claims

1. A comprehensive recovery process for eclogite-type rutile in a short process, characterized in that: The specific steps include: crushing the eclogite-type rutile to obtain crushed ore; performing a first grinding on the crushed ore to obtain a first grinding product; Screening and desludging the first grinding product to obtain fine mud and floating material; flotation of the floating material to obtain flotation concentrate and flotation tailings; performing a second grinding on the flotation concentrate to obtain a second grinding product; drying and roasting the second grinding product to obtain a roasted concentrate; The roasted concentrate is subjected to a first high-intensity magnetic separation to obtain a rutile concentrate and a magnetic product; The flotation tailings are subjected to a second high-intensity magnetic separation to obtain a second high-intensity magnetic separation concentrate and a second high-intensity magnetic separation tailings; The second high-intensity magnetic separation concentrate is subjected to the first gravity separation to obtain garnet concentrate, the first gravity separation middling and the first gravity separation tailings, and the first gravity separation middling is returned to the second high-intensity magnetic separation; combining the first gravity separation tailings and the second gravity separation concentrate to form a coarse omphacite concentrate; The omphacite coarse concentrate is subjected to the third gravity separation to obtain the omphacite concentrate, the third gravity separation middling and the third gravity separation tailings. The third gravity separation middling is returned to the first gravity separation, and the third gravity separation tailings are returned to the second gravity separation.

2. The comprehensive recovery process according to claim 1, characterized in that: The crushing step includes performing primary crushing on the eclogite-type rutile to obtain medium-crushed ore; and performing secondary crushing on the medium-crushed ore to obtain crushed ore; The particle size of the crushed ore is -3mm; and / or, the mass percentage of minerals with a particle size of -0.074 mm in the first grinding product is 50% to 70%; and / or, the particle size of the desludging by screening is +0.013 mm, and the particle size of the fine mud is -0.013 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 60%.

3. The comprehensive recovery process according to claim 1, characterized in that: The full-size flotation includes flotation roughing, flotation sweeping and flotation cleaning; The number of flotation roughing selections is 1 to 2 times, the number of flotation sweeping selections is 0 to 1 time, and the number of flotation cleaning selections is 2 to 4 times.

4. The comprehensive recovery process according to claim 1, characterized in that: The reagents used in the full-size flotation include one of lead nitrate and lead acetate, sodium fluorosilicate, diesel and fatty acid collectors; The fatty acid collector includes one or more of sodium oleate, oxidized paraffin soap, pentahydroxamic acid, benzyl arsenic acid and styrenephosphonic acid.

5. The comprehensive recovery process according to claim 1, characterized in that: The drying includes low-temperature drying, the temperature of the low-temperature drying is 60-100° C., and the time of the low-temperature drying is 2-4 hours; And / or, the calcination includes oxidation calcination, the temperature of the oxidation calcination is 700-1000° C., and the time of the oxidation calcination is 1-4 hours.

6. The comprehensive recovery process according to claim 1, characterized in that: The magnetic field strength of the first strong magnetic separation is 300-600 kA / m; The magnetic field strength of the second strong magnetic separation is 400-700 kA / m.

7. The comprehensive recovery process according to claim 1, characterized in that: The second high-intensity magnetic separation concentrate is subjected to the first gravity separation to obtain garnet concentrate, the first gravity separation middling and the first gravity separation tailings, and the first gravity separation middling returns to the second high-intensity magnetic separation, the steps comprising: The second high-intensity magnetic separation concentrate is subjected to gravity roughing to obtain gravity roughing concentrate, gravity roughing middling and gravity roughing tailings; The gravity roughing ore is subjected to gravity concentration to obtain gravity concentration concentrate, first gravity concentration ore and gravity concentration tailings; The gravity rougher concentrate and the gravity cleaned concentrate are combined to obtain the garnet concentrate, and the gravity rougher tailings and the gravity cleaned tailings are combined to obtain the first gravity tailings; The first gravity separation ore is returned to the second high-intensity magnetic separation.

8. The comprehensive recovery process according to claim 1, characterized in that: The second high-intensity magnetic separation tailings are subjected to second gravity separation to obtain second gravity separation concentrate, second gravity separation middlings and total tailings, and the second gravity separation middlings are returned to the second high-intensity magnetic separation, the steps comprising: performing gravity roughing on the second high-intensity magnetic separation tailings to obtain gravity roughing concentrate, gravity roughing middlings and gravity roughing tailings; The gravity roughing ore is subjected to gravity concentration to obtain gravity concentration concentrate, second gravity concentration ore and gravity concentration tailings; Combining the gravity rougher concentrate and the gravity beneficiation concentrate to obtain the double gravity concentrate, and combining the gravity rougher tailings and the gravity beneficiation tailings to obtain the total tailings; The second gravity separation ore is returned to the second high-intensity magnetic separation.

9. The comprehensive recovery process according to claim 1, characterized in that: The omphacite coarse concentrate is subjected to a third gravity separation to obtain an omphacite concentrate, a third gravity separation middling and a third gravity separation tailings, the third gravity separation middling is returned to the first gravity separation, and the third gravity separation tailings are returned to the second gravity separation, the steps comprising: Performing gravity roughing on the omphacite coarse concentrate to obtain gravity roughing concentrate, gravity roughing middling and gravity roughing tailings; The gravity-separated rougher concentrate is subjected to two-stage gravity-separation to obtain the omphacite concentrate, gravity-separated middlings and gravity-separated tailings; The gravity rougher middlings and the gravity cleaned middlings are combined to obtain the third gravity cleaned middlings, and the gravity rougher tailings and the gravity cleaned tailings are combined to obtain the third gravity cleaned tailings; Returning the third re-selection mined material to the first re-selection; The third gravity separation tailings are returned to the second gravity separation.

10. The comprehensive recovery process according to any one of claims 1 to 10, characterized in that: The grade of TiO2 in the eclogite ore is 1.5% to 4.0%.

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