Ilmenite pre-enrichment device and method for vanadium titano-magnetite

Abstract

The ilmenite pre-enrichment device comprises a vertical cavity and an inclined cavity, an inclined plate is contained in the inclined cavity, a water supplementing pipe is arranged in the inclined cavity, a tailing discharging part is arranged above the inclined cavity, a stirring component is arranged in the vertical cavity, a body of the vertical cavity is a cylinder, and the lower portion of the vertical cavity is a cone. A concentrate discharging pipe is arranged below the cone and connected with an ascending water pipe, and the ascending water pipe is used for inputting water into the vertical cavity and pushing low-density mineral particles in the ascending water pipe to move upwards along the inclined plates in the vertical cavity and the inclined cavity through the input water and water supplemented from the supplementing water pipe. According to the pre-concentration device, low-density mineral particles are pushed out from the tailing discharging part, high-density ilmenite falls down from the concentrate discharging pipe, pre-concentration of the ilmenite is achieved, the grade of TiO2 in pre-concentration concentrate products can be improved, the amount of materials entering desulfurization and titanium flotation operation is reduced, consumption of flotation reagents is reduced, and the production cost is reduced. The invention further discloses an ilmenite pre-enrichment method of the vanadium titano-magnetite.

Description

Technical Field

[0001] The invention belongs to the technical field of comprehensive utilization of vanadium-titanium magnetite, and in particular relates to an ilmenite pre-enrichment device and method for vanadium-titanium magnetite. Background Art

[0002] Titanium possesses a range of unparalleled properties unmatched by other metals, including high specific strength, light weight, corrosion resistance, shape memory, excellent ductility and biocompatibility, superconductivity, and strong surface decorative properties. It is widely used in a wide range of fields, including aerospace, petrochemicals, construction, electricity, healthcare, and sporting goods. TiO2, a white inorganic pigment, is widely used in coatings, plastics, chemical fibers, rubber, papermaking, printing inks, and cosmetics. The main industrially valuable titanium-containing minerals in nature are ilmenite and rutile, with ilmenite accounting for approximately 93.42% of titanium resources (measured as TiO2).

[0003] In existing technologies, the process for recovering titanium resources from vanadium-titanium magnetite iron ore tailings has evolved from spiral chute gravity separation - flotation desulfurization - drying - electrostatic separation to high-intensity magnetic separation - flotation desulfurization - flotation separation. The TiO2 grade of the material entering the flotation desulfurization titanium separation process is generally 11% to 18%, while the TiO2 grade of the flotation ilmenite concentrate is generally 45% to 47%. This requires the addition of large amounts of sulfuric acid and other flotation reagents. The high acidity results in high flotation reagent consumption and severe corrosion of equipment and pipelines. Therefore, there is an urgent need to improve the TiO2 grade of the flotation feedstock to reduce flotation reagent consumption.

[0004] In the existing technology, the TFe content in the vanadium-titanium magnetite iron ore tailings is about 13%, and the TiO2 content is about 9%. Because the TiO2 grade of the pre-enriched concentrate using a single vertical ring pulsating high-gradient magnetic separator can only be increased to 14% to 15%, and the TiO2 recovery rate of the pre-enriched concentrate is only 65% ​​to 75%, it can be seen that the pre-enrichment efficiency of ilmenite is relatively low, which results in a waste of titanium resources. Summary of the Invention

[0005] To solve the above problems, the present invention provides a vanadium-titanium magnetite ilmenite pre-enrichment device and method, which can improve the grade of TiO2 in the pre-enriched concentrate product, reduce the amount of material entering the desulfurization and titanium flotation operation, reduce the consumption of flotation agents, and reduce production costs.

[0006] The present invention provides a ilmenite pre-enrichment device for vanadium-titanium magnetite, comprising a vertical cavity and an inclined cavity that are interconnected, the vertical cavity being located below the inclined cavity, the inclined cavity containing an inclined plate and having a supplementary water pipe on the outer periphery, a tailings discharge portion being provided above the inclined cavity, a stirring component being provided inside the vertical cavity, the main body of the vertical cavity being cylindrical and the lower part being conical, a feeding pipe being provided on the outer periphery of the main body, a concentrate discharge pipe being provided below the cone and being connected to a rising water pipe on the outer periphery, the rising water pipe being used to input water into the vertical cavity and to use the input water and the water supplemented from the supplementary water pipe to jointly push the low-density mineral particles therein to move upward along the inclined plates in the vertical cavity and the inclined cavity, so that the low-density mineral particles are pushed out from the tailings discharge portion and the high-density ilmenite falls from the concentrate discharge pipe, thereby realizing the pre-enrichment of the ilmenite.

[0007] Preferably, in the above-mentioned ilmenite pre-concentration device for vanadium-titanium magnetite, the inclined cavity has a cylindrical shape with a diameter of 20 cm to 30 cm, and an inclination angle relative to the horizontal plane is 65° to 75°.

[0008] Preferably, in the ilmenite pre-concentration device for vanadium-titanium magnetite, the inclined plates have a smooth surface, and the spacing between adjacent inclined plates is 0.8 cm to 1.2 cm, and the length of the inclined plates is 120 cm to 180 cm.

[0009] Preferably, in the above-mentioned ilmenite pre-concentration device for vanadium-titanium magnetite, the main body of the vertical cavity is in the shape of a cylinder with a diameter of 30 cm to 40 cm and a height of 40 cm to 60 cm.

[0010] Preferably, in the ilmenite pre-enrichment device for vanadium-titanium magnetite, the number of the rising water pipes is 6 to 8, the diameter is 1 cm to 2 cm, and they are evenly distributed along the outer periphery of the cone;

[0011] The diameter of the water supply pipe is 0.8 cm to 1.2 cm, and the distance between adjacent water supply pipes is 20 cm to 30 cm.

[0012] Preferably, in the ilmenite pre-concentration device for vanadium-titanium magnetite, the angle between the cone surface and the horizontal plane is 50° to 70°.

[0013] Preferably, in the ilmenite pre-concentration device for vanadium-titanium magnetite, the diameter of the concentrate discharge pipe is 1 cm to 2 cm, and the concentrate discharge pipe is further provided with a concentrate discharge valve;

[0014] The tailings discharge part includes a tailings collection trough and a tailings discharge pipe with a diameter of 2 cm to 4 cm.

[0015] Preferably, in the ilmenite pre-concentration device for vanadium-titanium magnetite, the stirring component includes a stirring impeller and a stirring shaft and a transmission component connected thereto.

[0016] Preferably, in the ilmenite pre-enrichment device for vanadium-titanium magnetite, the feed pipe is arranged in the middle of the body and has a diameter of 1 cm to 2 cm.

[0017] The present invention provides a method for pre-enriching ilmenite from vanadium-titanium magnetite, comprising:

[0018] S1: The iron ore tailings are screened through a high-frequency vibrating screen, and the undersize product enters step S2;

[0019] S2: The undersize product is sent to a permanent magnetic drum separator to remove strongly magnetic minerals and iron tailings to proceed to step S3;

[0020] S3: using a vertical ring pulsating high gradient magnetic separator to pre-enrich the iron-removed tailings for ilmenite, and the magnetic pre-enriched concentrate enters step S4;

[0021] S4: using an inclined plate concentrator to concentrate the magnetic separation pre-enriched concentrate, the primary concentrated grit obtained enters step S5, and the primary concentrated overflow enters step S7;

[0022] S5: The primary concentrated sand is sent to a mixing tank and water is added to adjust the slurry concentration, and then the slurry is pumped into step S6;

[0023] S6: using the ilmenite pre-enrichment device for vanadium-titanium magnetite as described in any one of the above items, adjusting the parameters of the feed rate, rising water volume, stirring speed, discharge speed, and inclined plate water replenishment to obtain a first pre-enriched titanium concentrate;

[0024] S7: using an inclined plate concentrator to perform secondary concentration on the primary concentration overflow, the obtained secondary concentrated sediment is used as the second pre-enriched titanium concentrate, and the obtained secondary concentrated overflow is returned to step S1;

[0025] S8: combining the first pre-enriched titanium concentrate and the second pre-enriched titanium concentrate to form a pre-enriched titanium total concentrate.

[0026] From the above description, it can be known that the ilmenite pre-enrichment device for the above-mentioned vanadium-titanium magnetite provided by the present invention includes a vertical cavity and an inclined cavity that are interconnected. The vertical cavity is located below the inclined cavity, so that water can flow in these cavities with particles. The inclined cavity contains an inclined plate and has a water supply pipe on the outer periphery, so that water and particles can move on the surface of these inclined plates. There is a tailings discharge part above the inclined cavity, which is used to discharge tailings that can rise to this part due to their low density. The vertical cavity contains a stirring component, which can stir various particles evenly and disperse them from each other. The main body of the vertical cavity is cylindrical and the lower part is cone. The cross-sectional area of ​​the lower cone is smaller than the cross-sectional area of ​​the upper cylinder, so that it can ensure that water can only move upward with particles with low density. The outer periphery of the main body is provided with a feeding pipe, from which minerals can be transported into the cavity. A concentrate discharge is provided below the cone. The ore pipe has a rising water pipe connected to its outer periphery. This concentrate discharge pipe is used to discharge ilmenite concentrate that cannot move upward along the inclined plate due to its high density and can only fall into the concentrate discharge pipe. This rising water pipe is used to input water into the vertical cavity to carry the particles upward. The rising water pipe is used to input water into the vertical cavity and use the input water and the water added from the replenishing water pipe to jointly push the low-density mineral particles therein to move upward along the inclined plate in the vertical cavity and the inclined cavity, so that the low-density mineral particles are pushed out from the tailings discharge part and the high-density ilmenite falls from the concentrate discharge pipe. It can be seen that in this way, the ilmenite and the low-density mineral particles, that is, the tailings, can be effectively separated to achieve pre-enrichment of the ilmenite. It can be seen that the device can improve the grade of TiO2 in the pre-enriched concentrate product, and can reduce the amount of material entering the desulfurization and titanium flotation operation, thereby reducing the consumption of flotation agents and reducing production costs. The ilmenite pre-enrichment method of the vanadium-titanium magnetite provided by the present invention has the same advantages as the above-mentioned device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of an embodiment of an ilmenite pre-enrichment device for vanadium-titanium magnetite provided by the present invention;

[0029] Figure 2 This is a schematic diagram of an embodiment of a method for pre-enrichment of ilmenite from vanadium-titanium magnetite provided by the present invention. DETAILED DESCRIPTION

[0030] The core of the present invention is to provide an ilmenite pre-enrichment device and method for vanadium-titanium magnetite, which can improve the grade of TiO2 in the pre-enriched concentrate product, reduce the amount of material entering the desulfurization and titanium flotation operation, reduce the consumption of flotation agents, and reduce production costs.

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] An embodiment of the ilmenite pre-enrichment device of vanadium-titanium magnetite provided by the present invention is as follows: Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of a vanadium-titanium magnetite ilmenite pre-enrichment device provided by the present invention. The vanadium-titanium magnetite ilmenite pre-enrichment device may include a vertical cavity 1 and an inclined cavity 2 that are interconnected. The vertical cavity 1 is located below the inclined cavity 2. The cross-sectional areas of the vertical cavity 1 and the inclined cavity 2 may preferably be the same, so that they can be conveniently connected together. They can be connected by, but are not limited to, welding, as long as no gaps are left between the two. The inclined cavity 2 contains an inclined plate 3 and has a water supply pipe 4 on the outer periphery. These inclined plates 3 are arranged in parallel with each other in sequence to provide a path for the rise of water and mineral particles. The number of inclined plates 3 provided may be determined according to the size of the mineral particles to be processed. The water supply pipe 4 may be installed in each cavity. One is set at a certain distance to realize the relay input of water, to ensure that the water continues to rise with the mineral particles, to avoid the situation where it is unable to continue rising after rising to a certain height. There is a tailings discharge part 5 above the inclined cavity 2, so that the mineral particles with relatively small density can be discharged from here. This is the tailings, and the gravity of the ilmenite with larger density is greater than the driving force of the rising water, so it can move downward, thereby realizing effective separation from the tailings. The vertical cavity 1 contains a stirring component 6, which can stir the incoming materials evenly and disperse them from each other to avoid keeping large blocks and blocking the rising channel. The main body 101 of the vertical cavity 1 is a cylinder and the lower part is a cone 102, wherein the main body 101 and the cone 102 can be a whole, from Figure 1It can be seen that the cross-sectional area of ​​the cone 102 becomes smaller as it goes downwards. A feed pipe 7 is provided on the periphery of the main body 101, from which minerals can be transported in. The number of feed pipes 7 can be multiple and is not limited here. A concentrate discharge pipe 8 is provided below the cone 102 and an ascending water pipe 9 is connected to the periphery. The concentrate, that is, the ilmenite mentioned above, will not be carried up by the water flow due to its high density. After falling into the concentrate discharge pipe 8, it will flow out, thereby realizing the pre-enrichment of the ilmenite. In addition, the number of ascending water pipes 9 can be adjusted according to the actual flow requirements. Select, this rising water pipe 9 is used to input water into the vertical cavity 1 and use the input water and the water added from the water supply pipe 4 to jointly push the low-density mineral particles therein to move upward along the inclined plate 3 in the vertical cavity 1 and the inclined cavity 2, so that the low-density mineral particles are pushed out from the tailings discharge part 5, and the high-density ilmenite falls from the concentrate discharge pipe 8 to achieve pre-enrichment of ilmenite. It can be seen that the difference in density between the two is utilized here, and the separation of ilmenite and tailings is achieved through the upward push of water, which is not only simple to operate, but also has a better separation effect.

[0033] From the above description, it can be known that in the embodiment of the ilmenite pre-enrichment device for vanadium-titanium magnetite provided by the present invention, since it includes a vertical cavity 1 and an inclined cavity 2 that are interconnected, the vertical cavity 1 is located below the inclined cavity 2, so that water can flow in these cavities with particles, the inclined cavity 2 contains an inclined plate 3 and has a water supply pipe 4 on the outer periphery, so that water and particles can move on the surface of these inclined plates 3, and there is a tailings discharge part 5 above the inclined cavity 2 for discharging tailings that can rise to this part due to low density, and the vertical cavity 1 contains a stirring component 6, so that various particles can be stirred evenly and dispersed with each other, the main body 101 of the vertical cavity 1 is cylindrical and the lower part is a cone 102, the cross-sectional area of ​​the lower cone 102 is smaller than the cross-sectional area of ​​the upper cylinder, so that it can ensure that water can only move upward with particles with low density, and the outer periphery of the main body 101 is provided with a feeding pipe 7, from which the mineral can be transported into the cavity, the cone 10 2 is provided with a concentrate discharge pipe 8 and a rising water pipe 9 is connected to the outer periphery. This concentrate discharge pipe 8 is used to discharge ilmenite concentrate that cannot move upward along the inclined plate 3 due to its high density and can only fall into the concentrate discharge pipe 8. This rising water pipe 9 is used to input water into the vertical cavity 1 to carry the particles upward. The rising water pipe 9 is used to input water into the vertical cavity 1 and use the input water and the water added from the replenishing water pipe 4 to jointly push the low-density mineral particles therein to move upward along the inclined plate 3 in the vertical cavity 1 and the inclined cavity 2, so that the low-density mineral particles are pushed out from the tailings discharge part 5 and the high-density ilmenite falls from the concentrate discharge pipe 8. It can be seen that in this way, the ilmenite and the low-density mineral particles, that is, the tailings, can be effectively separated to achieve pre-enrichment of the ilmenite. It can be seen that the device can improve the grade of TiO2 in the pre-enriched concentrate product, and can reduce the amount of material entering the desulfurization and titanium flotation operation, thereby reducing the consumption of flotation agents and reducing production costs.

[0034] In a specific embodiment of the ilmenite pre-concentration device for vanadium-titanium magnetite, the inclined chamber 2 may have a cylindrical shape with a diameter of 20 to 30 cm and an inclination angle of 65 to 75 degrees relative to the horizontal plane. Furthermore, the diameter may preferably be 30 cm, and the inclination angle may preferably be 75 degrees. Different inclination angles result in different descent rates of fine-grained ilmenite in the rising slurry. A larger inclination angle results in a faster descent rate of the ilmenite. This can be determined based on actual conditions.

[0035] In another specific embodiment of the ilmenite pre-enrichment device for the above-mentioned vanadium-titanium magnetite, the inclined plate 3 can have a smooth surface, and the spacing between adjacent inclined plates 3 is 0.8 cm to 1.2 cm, and can further preferably be 1.0 cm apart, which is related to the size of the material to be processed. The length of the inclined plate 3 is 120 cm to 180 cm, and the length is further preferably 150 cm, which is consistent with the length of the inclined cavity 2, and the width of the inclined plate 3 must ensure that both sides can contact the inner surface of the inclined cavity 2 to avoid gaps. Moreover, the main body 101 of the above-mentioned vertical cavity 1 can preferably be a cylindrical shape with a diameter of 30 cm to 40 cm and a height of 40 cm to 60 cm. Furthermore, the diameter can preferably be 30 cm and the height can preferably be 50 cm, so that it can accommodate enough water and materials and provide stirring space. Of course, other size parameters can also be selected according to actual needs, which are not limited here.

[0036] In another specific embodiment of the ilmenite pre-enrichment device for the above-mentioned vanadium-titanium magnetite, the number of riser pipes 9 is 6 to 8, more preferably 8, with a diameter of 1 cm to 2 cm, more preferably 1.5 cm, and is evenly distributed along the outer periphery of the cone 102. The flow rate of each riser pipe 9 can be controlled individually. When 8 are selected, the angle between adjacent riser pipes 9 is 45°, and when 6 are selected, the angle between adjacent riser pipes 9 is 60°; the diameter of the supplementary water pipe 4 can be 0.8 cm to 1.2 cm, more preferably 1.0 cm, and the spacing between adjacent supplementary water pipes 4 is 20 cm to 30 cm, more preferably 30 cm, and the flow rate of each supplementary water pipe 4 can be controlled individually. In addition, the angle between the conical surface of the above-mentioned cone 102 and the horizontal plane can be 50° to 70°, and more preferably 60°, so that a progressive diameter reduction can be provided, thereby gradually increasing the ability to block the water flow and preventing the water from flowing downward. Of course, other angles can also be selected according to actual needs, and there is no restriction here.

[0037] In a preferred embodiment of the ilmenite pre-enrichment device of the above-mentioned vanadium-titanium magnetite, continue to refer to Figure 1 The diameter of the concentrate discharge pipe 8 can be 1 cm to 2 cm, more preferably 1.5 cm, and the concentrate discharge pipe 8 is also provided with a concentrate discharge valve 10, so that the concentrate discharge process can be accurately controlled. When the concentrate needs to be discharged, the concentrate discharge valve 10 can be opened. The operation is simple, and the relevant water pump can be connected to the concentrate discharge pipe 8 to achieve strong extraction and speed up the concentrate discharge. Figure 1The above-mentioned tailings discharge part 5 can include a tailings collection trough 51 and a tailings discharge pipe 52 with a diameter of 2 cm to 4 cm. The tailings collection trough 51 can collect tailings from multiple parts, and the tailings discharge pipe 52 can discharge the tailings collected from various parts from here in a unified manner, thereby facilitating the transportation of the tailings.

[0038] Continue to refer Figure 1 In another preferred embodiment of the ilmenite pre-enrichment device for the above-mentioned vanadium-titanium magnetite, the above-mentioned stirring component 6 may include a stirring impeller 601 and a stirring shaft 602 and a transmission component 603 connected thereto, so that the transmission component 603 can be connected to an external motor to transmit the rotation of the motor to the stirring shaft 602 to rotate it, thereby driving the stirring impeller 601 to stir in the vertical cavity 1, so that the material can be stirred more evenly and effectively dispersed, and the stirring speed can be controlled.

[0039] In another preferred embodiment of the ilmenite pre-enrichment device for vanadium-titanium magnetite, the feed pipe 7 can be located in the middle of the body 101 and have a diameter of 1 cm to 2 cm. This allows the mineral to be transported and stirred from the middle of the height of the body 101, providing a larger stirring space. The diameter can preferably be 1.5 cm. Of course, if a mineral with a larger diameter needs to be processed, a feed pipe 7 with a larger diameter should be used. This can be selected based on actual needs and is not a limitation herein.

[0040] The present invention provides a method for pre-enrichment of ilmenite from vanadium-titanium magnetite. Figure 2 As shown, Figure 2 This is a schematic diagram of an embodiment of a method for pre-enrichment of ilmenite from vanadium-titanium magnetite provided by the present invention, which may include the following steps:

[0041] S1: The iron ore tailings are screened through a high-frequency vibrating screen, and the undersize product enters step S2;

[0042] S2: The undersize product is sent to a permanent magnetic drum separator to remove strongly magnetic minerals and iron-removing tailings to proceed to step S3;

[0043] S3: Using a vertical ring pulsating high gradient magnetic separator to pre-enrich the iron-removed tailings for ilmenite, and the magnetic pre-enriched concentrate enters step S4;

[0044] S4: Using an inclined plate concentrator to concentrate the magnetic pre-enriched concentrate, the primary concentrated grit obtained enters step S5, and the primary concentrated overflow enters step S7;

[0045] S5: The concentrated sediment is sent to a mixing tank and water is added to adjust the slurry concentration, and then the slurry is pumped into step S6;

[0046] S6: using any of the above vanadium-titanium magnetite ilmenite pre-enrichment devices, adjusting the ore feeding rate, rising water volume, stirring speed, ore discharge speed, and inclined plate water replenishment parameters to obtain a first pre-enriched titanium concentrate;

[0047] S7: using an inclined plate concentrator to perform secondary concentration on the primary concentrated overflow, the secondary concentrated sedimentation sand obtained is used as the second pre-enriched titanium concentrate, and the secondary concentrated overflow obtained is returned to step S1;

[0048] S8: combining the first pre-enriched titanium concentrate and the second pre-enriched titanium concentrate to form a pre-enriched titanium total concentrate.

[0049] It should be noted that this method adopts the process of pre-enriching ilmenite by using an ilmenite pre-enrichment device of iron ore selection - slag separation - weak magnetic iron removal - strong magnetic pre-enrichment of ilmenite - strong magnetic concentrate inclined plate concentration and classification - titanium magnetite. Compared with the existing vertical ring pulsating high gradient magnetic separation process, this method can obtain a pre-enriched titanium concentrate product with a higher TiO2 content, significantly reduce the amount of material entering the flotation operation, and lay the foundation for the further economic utilization of ilmenite using vanadium titanium magnetite.

[0050] The above device and method are described in detail below with a specific comparative example:

[0051] The conventional process based on SLon500-1.5T vertical ring pulsating high gradient magnetic separator was used, and the results obtained are shown in Table 1. Table 1 is a table of results obtained using the conventional process.

[0052] Table 1 Results obtained using conventional process

[0053]

[0054] The above-mentioned device and method provided by this application are described in detail as follows:

[0055] The main physical and chemical properties of the ore used are as follows: the iron ore tailings sample contains TFe 14.25%, TiO2 9.22%, V2O5 0.02%, SiO2 43.32%, CaO 10.22%, MgO 7.35%, Al2O3 4.28%, MnO 0.13%, and S 0.25%, and the sample with a particle size of -0.074mm accounts for 63.11%; the sample contains pyroxene 37.27%, ilmenite 25.08%, labradorite 9.60%, hornblende 9.38%, olivine 4.58%, anorthite 3.95%, titanomagnetite 2.94%, albite 1.74%, sphene 1.24%, pyrrhotite 0.96%, and the amount of other minerals is relatively small; the dissociation degree of ilmenite monomer is 88.09%.

[0056] The test process is as follows:

[0057] (1) Slag separation: Add the dry iron ore tailings into the hopper of a 10 cm × 10 cm swing feeder, adjust the swing feeder valve to a feed rate of 100 kg / h, add water to adjust the concentration to 40%, and use a vertical sand pump to feed the tailings into the KM-800-4S vibrating screen for sieving and slag separation. The screen hole diameter is 1.0 mm, and the product on the screen is used as tailings 1;

[0058] (2) Weak magnetic separation and iron removal: The undersize product is fed into the XCRS-ф400×300 drum magnetic separator with a magnetic field strength of 3500Oe. The magnetic concentrate is used as the secondary iron concentrate, and the magnetic tailings are fed into the operation (3) using a vertical sand pump.

[0059] (3) Pre-enrichment of ilmenite by strong magnetic separation: the magnetic field strength of the SLon500-1.5T vertical ring pulsating high gradient magnetic separator was adjusted to 9000 Oe, the stroke to 35 mm, the stroke rate to 350 times / min, and the rotation speed to 2.5 rad / min to perform strong magnetic separation to obtain strong magnetic separation tailings as tailings 2, and the strong magnetic separation concentrate entered (4) operation;

[0060] (4) Primary inclined plate concentration classification: 1m 2 The inclined plate concentrator is used to concentrate and classify the strong magnetic concentrate, and the bottom flow concentration of the inclined plate concentrator is controlled to be 30%. The bottom flow of the inclined plate is pumped into the operation (5), and the overflow of the inclined plate flows into the operation (6) by gravity.

[0061] (5) Pre-enrichment of ilmenite using the above-mentioned vanadium-titanium magnetite ilmenite pre-enrichment device: adjusting the rising water flow of the vanadium-titanium magnetite ilmenite pre-enrichment device to 3 L / min, the stirring speed to 100 rad / min, the ore discharge speed to 0.6 L / min, and the inclined plate water supply volume to 0.05 L / min to 0.2 L / min to obtain pre-enriched titanium concentrate 1 and tailings 3;

[0062] (6) Secondary inclined plate concentration: using 4m 2 The inclined plate concentrator is used for primary inclined plate concentration and classification overflow to further concentrate, and the bottom flow concentration is controlled to be 10%. The secondary inclined plate concentration bottom flow is the pre-enriched titanium concentrate 2, and the secondary inclined plate concentration overflow is fed into (1) by a vertical sand pump;

[0063] (7) Pre-enriched titanium concentrate 1 and titanium concentrate 2 are the total pre-enriched titanium concentrate, and tailings 1, tailings 2 and tailings 3 are the total tailings.

[0064] The results obtained using the device and method provided by this application are shown in Table 2. Table 2 is a table of results obtained using the device and method provided by this application.

[0065] Table 2 Results obtained using the device and method provided by this application

[0066]

[0067] By comparing the two tables, it can be seen that by using the device and method provided in this application, a total pre-enriched titanium concentrate with a yield of 24.84%, a TiO2 content of 23.97%, and a TiO2 recovery rate of 64.59% can be obtained. Compared with the conventional process, the TiO2 grade of the pre-enriched titanium concentrate is increased by 5.21%, the TiO2 recovery rate is increased by 2.44%, and the amount of material entering the flotation operation is reduced by 5.69%.

[0068] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vanadium-titanium magnetite ilmenite pre-enrichment device, characterized in that: The invention comprises a vertical cavity and an inclined cavity which are interconnected, wherein the vertical cavity is located below the inclined cavity, an inclined plate is accommodated inside the inclined cavity and a water supply pipe is provided on the outer periphery, a tailings discharge portion is provided above the inclined cavity, a stirring component is accommodated inside the vertical cavity, the main body of the vertical cavity is cylindrical and the lower part is a cone, a feeding pipe is provided on the outer periphery of the main body, a concentrate discharge pipe is provided below the cone and a rising water pipe is connected to the outer periphery, the rising water pipe is used to input water into the vertical cavity and use the input water and the water supplied from the water supply pipe to jointly push the low-density mineral particles therein to move upward along the inclined plates in the vertical cavity and the inclined cavity, so that the low-density mineral particles are pushed out from the tailings discharge portion and the high-density ilmenite falls from the concentrate discharge pipe, thereby realizing the pre-enrichment of the ilmenite.

2. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The inclined cavity has a cylindrical shape with a diameter of 20 cm to 30 cm, and an inclination angle relative to a horizontal plane is 65° to 75°.

3. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The inclined plates have a smooth surface, and a distance between adjacent inclined plates is 0.8 cm to 1.2 cm. The length of the inclined plates is 120 cm to 180 cm.

4. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The main body of the vertical cavity is in the shape of a cylinder with a diameter of 30 cm to 40 cm and a height of 40 cm to 60 cm.

5. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The number of the rising water pipes is 6 to 8, the diameter is 1 cm to 2 cm, and they are evenly distributed along the outer periphery of the cone; The diameter of the water supply pipe is 0.8 cm to 1.2 cm, and the distance between adjacent water supply pipes is 20 cm to 30 cm.

6. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The angle between the cone surface of the cone and the horizontal plane is 50° to 70°.

7. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The diameter of the concentrate discharge pipe is 1 cm to 2 cm, and the concentrate discharge pipe is also provided with a concentrate discharge valve; The tailings discharge part includes a tailings collection trough and a tailings discharge pipe with a diameter of 2 cm to 4 cm.

8. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The stirring component includes a stirring impeller, a stirring shaft connected thereto, and a transmission component.

9. The ilmenite pre-enrichment device of vanadium-titanium magnetite according to claim 1, characterized in that: The ore feeding pipe is arranged in the middle of the main body and has a diameter of 1 cm to 2 cm.

10. A method for pre-enrichment of ilmenite from vanadium-titanium magnetite, characterized in that: include: S1: The iron ore tailings are screened through a high-frequency vibrating screen, and the undersize product enters step S2; S2: The undersize product is sent to a permanent magnetic drum separator to remove strongly magnetic minerals and iron tailings to proceed to step S3; S3: using a vertical ring pulsating high gradient magnetic separator to pre-enrich the iron-removed tailings for ilmenite, and the magnetic pre-enriched concentrate enters step S4; S4: using an inclined plate concentrator to concentrate the magnetic separation pre-enriched concentrate, the primary concentrated grit obtained enters step S5, and the primary concentrated overflow enters step S7; S5: The primary concentrated sand is sent to a mixing tank and water is added to adjust the slurry concentration, and then the slurry is pumped into step S6; S6: using the ilmenite pre-enrichment device for vanadium-titanium magnetite according to any one of claims 1 to 9, adjusting the parameters of feed rate, rising water volume, stirring speed, discharge speed, and inclined plate water replenishment to obtain a first pre-enriched titanium concentrate; S7: using an inclined plate concentrator to perform secondary concentration on the primary concentration overflow, the obtained secondary concentrated sediment is used as the second pre-enriched titanium concentrate, and the obtained secondary concentrated overflow is returned to step S1; S8: combining the first pre-enriched titanium concentrate and the second pre-enriched titanium concentrate to form a pre-enriched titanium total concentrate.

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