An iron ore beneficiation process and its beneficiation equipment

Abstract

The present invention discloses an iron ore beneficiation process and its beneficiation equipment, which relates to the technical field of beneficiation equipment and includes a tank assembly, a feeding assembly, a concentrate collection assembly, and a frame. The present invention also discloses a beneficiation process for an iron ore beneficiation equipment, which includes the following steps: ore crushing, raw material injection, beneficiation, and tailings discharge. By setting the tank assembly, a feeding assembly is arranged in the middle of the tank assembly, and a concentrate collection assembly is arranged at the top of the tank assembly. The feeding assembly can realize the injection of pulp. The cooperation between the feeding assembly and the tank assembly can achieve the flotation effect of iron ore. The concentrate collection assembly can scrape the floating concentrate and bubbles into the concentrate tank and spray the concentrate and bubbles in the concentrate tank to realize the separation of the concentrate. While realizing the separation of the concentrate, the washing of the concentrate is also realized to improve the beneficiation efficiency of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of ore dressing equipment, and particularly relates to an iron ore dressing process and its dressing equipment. Background Art

[0002] There are many types of iron ores. Generally, a process flow of strong magnetic - flotation of sulfides - flotation of iron ores is adopted, which can recover most of the high - quality concentrates, reduce the discharge amount of iron tailings and the storage capacity pressure of the tailing pond.

[0003] The patent document with the publication number CN213727156U discloses a flotation machine for separating iron fine powder from metal iron ore slag, belonging to the field of ore dressing equipment. A flotation machine for separating iron fine powder from metal iron ore slag includes a flotation tank. A flotation device is arranged in the flotation tank. It further includes a screening tank. A feeding pipe is connected between the screening tank and the flotation tank. Multiple groups of nozzles are arranged in the feeding pipe. Water spray pipes are arranged on the nozzles. A feeding port is arranged on the screening tank. A fixing plate is rotatably connected in the screening tank. A filter screen is arranged on the fixing plate. A fixing block is arranged in the screening tank. A spring is fixedly connected to the fixing block. One end of the spring away from the fixing block is fixedly connected to the fixing plate. A driving motor is arranged on the side wall of the screening tank. The output end of the driving motor is fixedly connected to a first rotating shaft; through the arrangement of the spring, cam and filter screen, this patent facilitates the screening of iron powder, and the arrangement of the pumping and drainage mechanism, water spray pipe and nozzle facilitates the flushing of the iron powder in the feeding pipe.

[0004] The above - mentioned technical solution has some problems in practical applications. This technical solution only conducts ore dressing treatment by screening iron powder and then flushing it, with a low ore dressing efficiency and difficult to achieve a high flotation accuracy. Moreover, in existing similar iron ore flotation machines, it is not convenient to perform repeated cyclic flotation on ore materials during use. And during the flotation process, it is impossible to ensure that enough air is mixed into the ore materials and the ore materials enter the raw material tank in a more dispersed state for flotation work, resulting in a reduced flotation effect and affecting the flotation efficiency. At the same time, the tailings generated during the flotation process are prone to accumulate at the bottom of the raw material tank, affecting the subsequent continuous flotation work.

[0005] Therefore, it is very necessary to invent an iron ore dressing process and its dressing equipment to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an iron ore dressing process and its dressing equipment to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: An iron ore dressing equipment, comprising:

[0008] A tank body assembly, which includes a raw material tank and a concentrate tank, and the concentrate tank is arranged around the outer top of the raw material tank;

[0009] A frame, with the concentrate tank fixedly arranged inside the frame;

[0010] It further includes:

[0011] A feeding component, which includes a lower punching pipe fixedly arranged in the middle of the raw material tank. A Venturi tube is fixedly arranged at the top end of the lower punching pipe. A return material cover is arranged outside the lower punching pipe and is located inside the raw material tank. An outlet cover is arranged inside the return material cover and is located at the bottom end of the lower punching pipe. The outlet cover is arranged as a hollow conical structure. A plurality of discharge grooves are circumferentially arranged at the top end of the outer side wall of the outlet cover. An extension pipe is fixedly arranged at the notch of the discharge groove. A plurality of air guide pipes are circumferentially arranged at the top end of the inner side wall of the return material cover. An air outlet nozzle is fixedly arranged at the bottom end of the air guide pipe. The feeding component can realize the input and mixing of pulp and air;

[0012] A concentrate collection component, which can separate the concentrate and bubbles after flotation;

[0013] A discharging part. A rotating rod is coaxially and fixedly arranged at the bottom of the outlet cover. The discharging part is fixedly arranged at the bottom end of the rotating rod and is located at the bottom end of the raw material tank. The discharging part can drive the tailings to be quickly discharged from the bottom end of the raw material tank.

[0014] Preferably, each of the air outlet nozzles is arranged at the same inclination angle, and the air outlet direction of each air outlet nozzle faces the discharging end of the corresponding extension pipe. The outlet cover is rotatably arranged at the bottom end of the lower punching pipe. The plurality of air outlet nozzles can blow the outlet cover to rotate. A limiting frame is fixedly arranged at the top of the outlet cover, and a limiting ring is fixedly arranged at the bottom end of the lower punching pipe. The limiting ring is rotatably arranged inside the limiting frame.

[0015] Preferably, an air inlet pipe is fixedly arranged at the top end of the air guide pipe, and the air inlet pipe is fixedly arranged at the top end of the outer side wall of the return material cover.

[0016] Preferably, the top end of the outer side wall of the return material cover is arranged as an inclined structure, and a plurality of return material grooves are circumferentially arranged at the top end of the outer side wall of the return material cover. A plurality of guide plates are circumferentially arranged at the top end of the outer side wall of the return material cover, and the guide plates and the return material grooves are arranged in an alternating manner.

[0017] Preferably, a positioning sleeve is fixedly arranged at the top end of the return material cover, and the positioning sleeve is sleeved on the middle part of the lower punching pipe. An annular seat is arranged above the positioning sleeve, and the annular seat is fixedly arranged on the middle part of the lower punching pipe. A plurality of telescopic rods are fixedly arranged on the outer side of the annular seat, and the movable end of each telescopic rod is fixedly arranged on the top of the positioning sleeve.

[0018] Preferably, the concentrate collection assembly includes a fixed seat fixedly arranged at the top end of the inner side wall of the raw material tank. A fixed shaft is rotatably arranged inside the fixed seat. A plurality of discharge plates are fixedly arranged on the outer side of the fixed shaft. A water guide pipe is arranged above the fixed shaft. A plurality of water outlet pipes are fixedly arranged at the bottom end of the water guide pipe. A water outlet nozzle is fixedly arranged at the bottom end of the water outlet pipe. A connecting pipe is fixedly arranged at the top end of the water guide pipe. An inlet pipe is fixedly arranged at the top end of the connecting pipe.

[0019] Preferably, a positioning shaft is fixedly arranged at the top end of the water guide pipe. Both ends of the positioning shaft are movably provided with positioning ears through pin shafts, and the positioning ears are fixedly arranged at the top end of the fixed seat. One end of the positioning shaft is provided with a compression nut through threads, and the compression nut is in fit with the outer side wall of the positioning ear.

[0020] Preferably, a ring gear is fixedly arranged at one end of the fixed shaft. A driving gear is arranged on the outer side of the ring gear. A driving motor is fixedly arranged on the outer side of the driving gear, and the driving motor is fixedly arranged at the top end of the fixed seat.

[0021] Preferably, a tailings discharge pipe penetrates through the bottom end of the raw material tank. The bottom end of the concentrate tank is arranged in an inclined structure, and a concentrate discharge pipe penetrates through the bottom end of the outer side wall of the concentrate tank. The discharging member penetrates into the interior of the tailings discharge pipe.

[0022] A beneficiation process of an iron ore beneficiation device includes the following steps:

[0023] Step 1, ore crushing: Use a crusher to crush the ore to be processed, and after screening the crushed ore, add a flotation reagent to make pulp.

[0024] Step 2, raw material injection: Convey the pulp prepared in Step 1 to the feeding assembly through a material pump. The pulp enters the tank assembly under the guidance of the feeding assembly. During this process, the concentrate in the pulp floats to the top end of the tank assembly following the bubbles.

[0025] Step 3, beneficiation: The concentrate floats to one side of the concentrate collection assembly following the bubbles and enters the concentrate tank of the tank assembly under the guidance of the concentrate collection assembly. The remaining pulp circulates in the tank assembly.

[0026] Step 4, tailings discharge: After the pulp circulates in the tank assembly for multiple times, the concentrate in the pulp completes beneficiation, and the remaining tailings are discharged from the bottom of the tank assembly, thus completing the beneficiation of iron ore.

[0027] The technical effects and advantages of the present invention:

[0028] 1. The present invention realizes the injection of pulp by setting a trough component with a feeding component in the middle and a concentrate collection component at the top. The cooperation between the feeding component and the trough component can achieve the flotation effect of iron ore. The concentrate collection component can discharge the pulp after flotation to realize the flotation and separation of iron ore. The cooperation between the concentrate collection component and the feeding component can achieve the ore dressing process of iron ore to ensure the ore dressing accuracy of the device.

[0029] 2. The present invention sets a feeding component which includes a down - flushing pipe with a return - material cover on its outer side. The pulp is guided into the return - material cover through the down - flushing pipe. By setting multiple air - guiding pipes inside the return - material cover, the air - guiding pipes can realize the additional injection of air to guide the movement direction of the pulp. Thus, while ensuring the mixing of pulp and air to generate bubbles, the movement direction of the pulp is controlled. By setting a return - material trough at the top of the return - material cover, the return - material trough enables the pulp to circulate inside the device, thereby performing repeated flotation on the pulp, improving the flotation effect of the pulp, facilitating the separation of iron ore in the pulp by the concentrate collection component, and thus enhancing the ore - dressing efficiency and accuracy of the device.

[0030] 3. The present invention sets a concentrate collection component which includes a discharge plate and a water - outlet nozzle. The discharge plate scrapes the concentrate and bubbles floating around it into the concentrate trough. At this time, clear water is sprayed through the water - outlet nozzle of the water - discharge pipe to spray the concentrate and bubbles in the concentrate trough for the separation of the concentrate. While realizing the separation of the concentrate, the washing of the concentrate is also achieved to improve the ore - dressing efficiency of the device.

[0031] 4. The present invention inclines both the air - guiding pipe and the air - outlet nozzle towards the discharge end of the corresponding extension pipe, and rotatably sets the discharge cover at the bottom end of the down - flushing pipe. When flotation is carried out on pulp with a higher concentration, the air blown out from the air - outlet nozzle directly blows towards the discharge end of the extension pipe and drives the discharge cover to rotate. This not only enables the pulp in the discharge cover to be easily and quickly discharged under the action of centrifugal force, but also helps more air to mix into the pulp, increasing the air content in the pulp. At the same time, it also disperses the pulp discharged from the discharge end of the extension pipe, so that the pulp mixed with sufficient air enters the raw material trough in a more dispersed state, thereby generating more bubbles to ensure the smooth progress of the flotation work.

[0032] 5. Through the setting of the discharging part, while improving the separation effect, the tailings can be quickly discharged from the tailings discharge pipe, thereby improving the discharge efficiency of the tailings, avoiding the accumulation of tailings at the bottom of the raw material trough, and further ensuring the smooth progress of the flotation work. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is the overall structural schematic diagram of the present invention.

[0034] Figure 2 This is the front schematic view of the overall structure of the present invention.

[0035] Figure 3 This is the trajectory diagram of the pulp movement inside the device of the present invention.

[0036] Figure 4 This is the sectional schematic view of the overall structure of the device of the present invention.

[0037] Figure 5 This is the schematic diagram of the structure of the concentrate collection component of the present invention Figure 1 。

[0038] Figure 6 This is the schematic diagram of the structure of the concentrate collection component of the present invention Figure 2 。

[0039] Figure 7 This is the schematic diagram of the structure of the feeding component of the present invention.

[0040] Figure 8 This is the bottom view schematic diagram of the structure of the feeding component of the present invention.

[0041] Figure 9 This is the sectional schematic diagram of the structure of the feeding component of the present invention.

[0042] Figure 10 This is the schematic diagram of the installation position of the discharging part of the present invention.

[0043] Figure 11 This is the Figure 10 enlarged schematic view of part A in the present invention.

[0044] Figure 12 This is the installation schematic diagram of the air duct of the present invention.

[0045] Figure 13 This is the rotation trajectory diagram of the discharge hood of the present invention.

[0046] In the figure: 1. Tank assembly; 2. Feeding assembly; 3. Concentrate collection assembly; 4. Frame; 5. Rotating rod; 6. Discharging part; 101. Raw material tank; 102. Concentrate tank; 103. Tailings discharge pipe; 104. Concentrate discharge pipe; 201. Lower flushing pipe; 202. Venturi tube; 203. Return material cover; 204. Discharge cover; 205. Discharge chute; 206. Extension pipe; 207. Air guide pipe; 208. Air outlet nozzle; 209. Air inlet pipe; 210. Return material chute; 211. Guide plate; 212. Positioning sleeve; 213. Annular seat; 214. Telescopic rod; 215. Limit frame; 216. Limit ring; 301. Fixed seat; 302. Fixed shaft; 303. Discharge plate; 304. Water guide pipe; 305. Water outlet pipe; 306. Water outlet nozzle; 307. Connecting pipe; 308. Water inlet pipe; 309. Positioning shaft; 310. Positioning ear; 311. Compression nut; 312. Annular gear; 313. Driving gear; 314. Driving motor. Detailed implementation manners <000>

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Embodiment 1. The present invention provides an iron ore beneficiation device as Figures 1 to 9 shown, including a tank assembly 1, a feeding assembly 2, a concentrate collection assembly 3 and a frame 4. The feeding assembly 2 is arranged inside the tank assembly 1. Multiple groups of the concentrate collection assembly 3 are provided, and the multiple groups of the concentrate collection assembly 3 are arranged around the top end of the tank assembly 1. The tank assembly 1, the feeding assembly 2 and the concentrate collection assembly 3 are all arranged inside the frame 4.

[0049] The tank assembly 1 includes a raw material tank 101 and a concentrate tank 102, and the concentrate tank 102 is arranged around the outer top end of the raw material tank 101.

[0050] A tailings discharge pipe 103 is penetrated and arranged at the bottom end of the raw material tank 101. The bottom end of the concentrate tank 102 is arranged in an inclined structure, and a concentrate discharge pipe 104 is penetrated and arranged at the bottom end of the outer side wall of the concentrate tank 102.

[0051] The feeding assembly 2 includes a lower flushing pipe 201. The lower flushing pipe 201 is fixedly arranged in the middle of the raw material tank 101. A Venturi tube 202 is fixedly arranged at the top end of the lower flushing pipe 201. The Venturi tube 202 is arranged to guide the mixture of external air and pulp.

[0052] Specifically, a return material cover 203 is arranged on the outer side of the lower flushing pipe 201, and the return material cover 203 is arranged inside the raw material tank 101. An outlet cover 204 is arranged inside the return material cover 203, and the outlet cover 204 is arranged at the bottom end of the lower flushing pipe 201. The outlet cover 204 can guide and discharge the raw materials.

[0053] More specifically, the outlet cover 204 is arranged as a hollow conical structure. A plurality of discharge grooves 205 are circumferentially arranged at the top end of the outer side wall of the outlet cover 204. An extension pipe 206 is fixedly arranged at the notch of the discharge groove 205. A plurality of air guide pipes 207 are circumferentially arranged at the top end of the inner side wall of the return material cover 203. An air outlet nozzle 208 is fixedly arranged at the bottom end of the air guide pipe 207, and the direction of the air outlet nozzle 208 is downward. An air inlet pipe 209 is fixedly arranged at the top end of the air guide pipe 207, and the air inlet pipe 209 is fixedly arranged at the top end of the outer side wall of the return material cover 203. The air inlet pipe 209 can be connected to an external air pump to realize the injection of gas.

[0054] Moreover, the top end of the outer side wall of the return material cover 203 is arranged as an inclined structure. A plurality of return material grooves 210 are circumferentially arranged at the top end of the outer side wall of the return material cover 203. A plurality of guide plates 211 are circumferentially arranged at the top end of the outer side wall of the return material cover 203, and the guide plates 211 are arranged in a staggered manner with the return material grooves 210. The guide plates 211 can guide the pulp. When the pulp enters the return material grooves 210, it first moves along the surface of the guide plates 211. During this process, the concentrate and bubbles in the pulp can adhere to the surface of the guide plates 211, so as to reduce the amount of concentrate entering the return material cover 203, thereby achieving the effect of assisting in ore dressing.

[0055] Furthermore, a positioning sleeve 212 is fixedly arranged at the top end of the return material cover 203, and the positioning sleeve 212 is sleeved on the middle part of the lower flushing pipe 201. An annular seat 213 is arranged above the positioning sleeve 212, and the annular seat 213 is fixedly arranged on the middle part of the lower flushing pipe 201. A plurality of telescopic rods 214 are fixedly arranged on the outer side of the annular seat 213. The telescopic rods 214 can be electric telescopic rods, or hydraulic or pneumatic telescopic rods to realize automatic control. And the movable end of each telescopic rod 214 is fixedly arranged at the top of the positioning sleeve 212. The telescopic rods 214 are signal-connected to the controller of the equipment. By adjusting the telescopic amount of the telescopic rods 214 through the controller, the position between the positioning sleeve 212 and the annular seat 213 can be adjusted, so as to realize the adjustment of the height of the return material cover 203 to control whether the pulp circulates inside the device.

[0056] It should be noted that when the pulp concentration is relatively low, the content of concentrate to be floated in the pulp is also relatively low. At this time, the number of bubbles generated after the pulp is mixed with air can fully meet the flotation of the concentrate in the pulp, and the concentrate in the pulp can better follow the bubbles and float to the top of the raw material tank 101. Therefore, it is not necessary to re - float the pulp in the upper part of the raw material tank 101, and at this time, the requirement for the content of injected air is also relatively low. Therefore, the controller controls the telescopic rod 214 to shorten, thereby raising the height of the return material cover 203, so that the height of the return material trough 210 is above the pulp liquid level at the top of the raw material tank 101. At this time, the pulp at the top of the raw material tank 101 cannot pass through the return material trough 210 and re - enter the return material cover 203, so it cannot return to the bottom of the raw material tank 101 through the return material cover 203 for secondary flotation, thereby reducing the flotation burden, avoiding unnecessary flotation work, and improving the flotation efficiency.

[0057] When the pulp concentration is relatively high, the content of concentrate to be floated in the pulp is also relatively high. At this time, more air needs to be mixed into the pulp to generate more bubbles. And because the pulp concentration is relatively high, there is still un - thoroughly - floated concentrate in the pulp in the upper part of the raw material tank 101. At this time, this part of the pulp needs to be re - floated, otherwise it will lead to problems such as raw material waste and affect the flotation accuracy. Therefore, the controller controls the telescopic rod 214 to extend, thereby lowering the height of the return material cover 203, so that the return material trough 210 is completely in the pulp in the upper part of the raw material tank 101. At this time, the pulp at the top of the raw material tank 101 will enter the return material cover 203 through the return material trough 210 and move downward under the guidance of the pulp movement in the return material cover 203, thus realizing the circulation of the pulp in the raw material tank 101, and then achieving the purpose of re - flotation, so as to achieve the purpose of improving the flotation accuracy. When the height of the return material cover 203 is lowered, the air outlet nozzle 208 synchronously descends. At this time, the distance between the air outlet nozzle 208 and the discharge cover 204 becomes shorter, so that the air blown out by the air outlet nozzle 208 can more directly blow onto the pulp at the bottom of the raw material tank 101, thereby enabling more air to be mixed into the pulp, and then increasing the generation amount of bubbles. At the same time, because the force of the gas blown onto the pulp becomes relatively larger, the guiding effect of the air on the pulp will become stronger, enabling the pulp to move downward faster, which is helpful for the flotation of the pulp at the bottom of the raw material tank 101.

[0058] The concentrate collection assembly 3 includes a fixed seat 301, and the fixed seat 301 is fixedly arranged at the top of the inner side wall of the raw material tank 101.

[0059] Specifically, a fixed shaft 302 is fixedly arranged inside the fixed seat 301, and a plurality of discharge plates 303 are fixedly arranged on the outer side of the fixed shaft 302. The discharge plates 303 can scrape the concentrate and bubbles floating around them into the concentrate tank 102.

[0060] Moreover, a water guide pipe 304 is arranged above the fixed shaft 302. A plurality of water outlet pipes 305 are fixedly arranged at the bottom end of the water guide pipe 304. A water outlet nozzle 306 is fixedly arranged at the bottom end of the water outlet pipe 305. The water outlet direction of the water outlet nozzle 306 faces the concentrate tank 102. The water outlet nozzle 306 can spray clear water on the concentrate and bubbles in the concentrate tank 102 to ensure the flushing effect of the clear water on the concentrate.

[0061] Furthermore, a connecting pipe 307 is fixedly arranged at the top end of the water guide pipe 304. A water inlet pipe 308 is fixedly arranged at the top end of the connecting pipe 307. A positioning shaft 309 is fixedly arranged at the top end of the water guide pipe 304. Positioning ears 310 are movably arranged at both ends of the positioning shaft 309 through pin shafts. The positioning ears 310 are fixedly arranged at the top end of the fixed seat 301. A pressing nut 311 is arranged at one end of the positioning shaft 309 through threads. The pressing nut 311 is in fit with the outer side wall of the positioning ear 310. The pressing nut 311 can fix the position of the positioning shaft 309, thereby fixing the angle of the water outlet pipe 305.

[0062] Meanwhile, a ring gear 312 is fixedly arranged at one end of the fixed shaft 302. A driving gear 313 is arranged outside the ring gear 312. A driving motor 314 is fixedly arranged outside the driving gear 313. The driving motor 314 is fixedly arranged at the top end of the fixed seat 301. The driving motor 314 is used to drive the fixed shaft 302 to rotate.

[0063] In summary, the present device can inject pulp through the feeding assembly 2. After the pulp enters the tank assembly 1, the iron ore concentrate in the pulp can float up following the bubbles to achieve the flotation effect. When the concentrate moves to the top end of the tank assembly 1 following the bubbles, the concentrate collection assembly 3 can scrape the concentrate and bubbles floating around it. The iron ore concentrate moves to the concentrate tank 102 of the tank assembly 1 following the concentrate collection assembly 3 and completes the ore dressing process after being washed with clear water. The remaining pulp circulates inside the tank assembly 1 and completes the ore dressing operation under the discharging action of the concentrate collection assembly 3.

[0064] When the feeding component 2 conveys the pulp, the pulp is conveyed to the lower flushing pipe 201 by a material pump. When the pulp passes through the lower flushing pipe 201, the outside air is extracted into the lower flushing pipe 201 under the action of the venturi tube 202 and mixed with the pulp. Bubbles are generated after the pulp is mixed with the air. When the pulp moves to the discharge hood 204 at the bottom end of the lower flushing pipe 201, the pulp and the bubbles are discharged into the return hood 203 along the discharge groove 205 on the outer side of the discharge hood 204. At this time, the gas in the air guide pipe 207 is discharged downward through the air outlet nozzle 208, and the gas pushes the pulp to move downward, so that the pulp moves to the lower part of the return hood 203. At this time, the concentrate in the pulp floats to the top of the raw material tank 101 following the bubbles. During the ore dressing process, the pulp in the middle of the top of the raw material tank 101 can pass through the return chute 210 and enter the return hood 203, and move downward under the guidance of the movement of the pulp in the return hood 203 to realize the circulation of the pulp.

[0065] When the concentrate moves to the top of the raw material tank 101, the driving motor 314 drives the ring gear 312 to rotate through the driving gear 313. The ring gear 312 drives the fixed shaft 302 to rotate, and the fixed shaft 302 drives the discharge plate 303 to rotate synchronously. The discharge plate 303 scrapes the concentrate and bubbles floating around it into the concentrate tank 102. At this time, the water outlet pipe 305 sprays clear water through the water outlet nozzle 306, and the clear water sprays the concentrate and bubbles in the concentrate tank 102 to realize the separation of the concentrate.

[0066] The present invention also provides a beneficiation process for an iron ore beneficiation device, including the following steps:

[0067] Step 1, ore crushing: Use a crusher to crush the ore to be processed, and add a flotation reagent to the crushed ore after sieving to make pulp.

[0068] The ore crushing equipment can be a series of mineral crushing machines such as a jaw crusher and a ball mill. The ore is sieved after crushing to ensure that the particle size of the ore meets the beneficiation standard.

[0069] Step 2, raw material injection: Convey the pulp prepared in Step 1 to the feeding component 2 through a material pump. The pulp enters the tank body component 1 under the guidance of the feeding component 2. During this process, the concentrate in the pulp floats to the top of the tank body component 1 following the bubbles.

[0070] The feeding component 2 can inject air while conveying the pulp to ensure the formation of bubbles inside the pulp.

[0071] Step 3: Mineral separation. The concentrate floats to the periphery of the concentrate collection component 3 following the bubbles and enters the concentrate tank 102 of the tank component 1 under the scraping of the concentrate collection component 3. The remaining pulp circulates in the tank component 1. Meanwhile, the concentrate and bubbles in the concentrate tank 102 are sprayed with clear water to separate the concentrate.

[0072] Step 4: Tailings discharge. After the pulp circulates in the tank component 1 multiple times, the concentrate in the pulp is separated, and the remaining tailings are discharged from the bottom of the tank component 1, thus completing the separation of iron ore.

[0073] Embodiment 2. In the above embodiment, through the cooperation of the feeding component 2 and the tank component 1, the flotation effect of iron ore can be achieved. Meanwhile, the concentrate collection component 3 can perform discharging treatment on the flotation pulp to realize the flotation and separation of iron ore. Moreover, the air duct 207 can realize the additional injection of air to guide the movement direction of the pulp, thereby ensuring the mixing of the pulp and air to generate bubbles while controlling the movement direction of the pulp. The return chute 210 enables the pulp to circulate inside the device, facilitating the separation of iron ore in the pulp by the concentrate collection component 3, thus improving the separation efficiency and accuracy of the device.

[0074] However, during the flotation process, since the concentration of the pulp is not fixed, when the pulp concentration is low, the pulp can easily and quickly pass through the discharge chute 205 and the extension pipe 206 and be discharged from the discharge cover 204. And because the concentrate content in the pulp is low, the required air volume for mixing into the pulp is relatively small. Therefore, the downward-facing air outlet nozzle 208 and the discharge cover 204 set in the above embodiment are sufficient to meet the flotation requirements in this state. When the pulp concentration is high, the speed of the pulp passing through the discharge chute 205 and the extension pipe 206 will be relatively slow, that is, the relatively high-concentration pulp is relatively difficult to pass through the discharge chute 205 and the extension pipe 206 and be discharged from the discharge cover 204. And at this time, because the concentrate content in the pulp is high, more bubbles need to be generated to float the concentrate, which requires mixing more air into the pulp. However, the downward-facing air outlet nozzle 208 set in the above embodiment can only blow air into the pulp at the bottom of the raw material tank 101. Although this can, to a certain extent, promote the mixing of air into the pulp at the bottom of the raw material tank 101, the amount of air mixed into the pulp is limited, and it cannot directly blow and mix the pulp discharged from the discharge cover 204, resulting in a poor mixing effect of air and pulp and unable to ensure the generation of a sufficient amount of bubbles to meet the flotation requirements. Therefore, the present invention is further improved to enable the pulp with a high concentration to be easily and quickly discharged from the discharge cover 204 during flotation, improve the dispersion degree of the ore when it is discharged from the discharge cover 204, effectively improve the mixing effect of air and pulp, and ensure that enough bubbles can be generated for the smooth progress of the flotation work.

[0075] Specifically, as Figures 10 - 13 shown, each air duct 207 and each air outlet nozzle 208 are inclined in the same direction, and the air outlet direction of each air outlet nozzle 208 faces the discharge end of the corresponding extension pipe 206.

[0076] Meanwhile, the discharge hood 204 is rotatably arranged at the bottom end of the lower punching pipe 201. The multiple air outlet nozzles 208 can blow to drive the discharge hood 204 to rotate. A limiting frame 215 is fixedly arranged at the top of the discharge hood 204, and a limiting ring 216 is fixedly arranged at the bottom end of the lower punching pipe 201. The limiting ring 216 is rotatably arranged in the limiting frame 215, so that the discharge hood 204 can rotate at the bottom end of the lower punching pipe 201, and there is no relative up and down movement between the discharge hood 204 and the lower punching pipe 201.

[0077] It should be noted that when multiple air ducts 207 blow air outwards through the air outlet nozzles 208 at the same time, a swirling airflow can be formed. The blown air will act on the discharge end of the extension pipe 206. On the one hand, the air pressure can push the discharge hood 204 to rotate at the bottom end of the lower punching pipe 201. On the other hand, since the air is directly blown to the discharge end of the extension pipe 206, the air can be blown to the pulp discharged from the discharge end of the extension pipe 206, so as to improve the mixing effect of air into the pulp. At the same time, the air can also disperse the pulp discharged from the extension pipe 206, so that the pulp after mixing air can enter the raw material tank 101 in a more dispersed state, thereby improving the dispersion degree when the ore material descends.

[0078] When flotation is carried out on pulp with a higher concentration, the controller is used to move the return hood 203 downwards. On the one hand, the circulation of the pulp at the top end of the raw material tank 101 can be realized, achieving the effect of repeatedly flotation of the pulp. On the other hand, the return hood 203 drives the multiple air outlet nozzles 208 to move downwards synchronously, making the air outlet nozzles 208 closer to the discharge hood 204. At this time, the air pressure blown out from the air outlet nozzles 208 and acting on the discharge end of the extension pipe 206 will increase accordingly. Under the pushing action of the air pressure, the discharge hood 204 will rotate rapidly at the bottom end of the lower punching pipe 201, so that the pulp in the discharge hood 204 generates centrifugal force, which helps the pulp to be easily and quickly discharged from the extension pipe 206. And because the air pressure blown to the discharge end of the extension pipe 206 increases, that is, the air pressure directly blown to the pulp discharged from the discharge end of the extension pipe 206 becomes larger, this will help more air to be mixed into the pulp, thereby increasing the air mixing amount in the pulp, so as to achieve the purpose of generating more bubbles. At the same time, while mixing air into the pulp, the air also disperses the pulp discharged from the discharge end of the extension pipe 206, so that the pulp after mixing air can enter the raw material tank 101 in a more dispersed state, thereby improving the dispersion degree when the pulp falls into the interior of the raw material tank 101, and further improving the flotation effect.

[0079] By arranging both the air guide pipe 207 and the air outlet nozzle 208 to be inclined towards the discharge end of the corresponding extension pipe 206, and rotatably arranging the discharge cover 204 at the bottom end of the lower punching pipe 201, when flotation is carried out on the pulp with a relatively high concentration, the air blown out from the air outlet nozzle 208 directly blows towards the discharge end of the extension pipe 206 and drives the discharge cover 204 to rotate. This can not only enable the pulp in the discharge cover 204 to be easily and quickly discharged under the action of centrifugal force, but also helps more air to mix into the pulp, increasing the air content in the pulp. At the same time, it also disperses the pulp discharged from the discharge end of the extension pipe 206, so that the pulp mixed with sufficient air enters the raw material tank 101 in a more dispersed state, thereby generating more bubbles to ensure the smooth progress of the flotation work.

[0080] Example 3. In the above example, when flotation is carried out on the pulp with a relatively high concentration, the generation amount of tailings is also relatively high. If the tailings cannot be discharged in time, they will accumulate at the bottom of the raw material tank 101, affecting the smooth progress of the subsequent flotation work. Therefore, on the basis of the above example, the present invention is further improved so that the tailings can be discharged quickly and in time during the flotation process, avoiding the accumulation of tailings at the bottom of the raw material tank 101 and further ensuring the smooth progress of the flotation work.

[0081] Specifically, as Figure 10 and Figure 12 shown, a rotating rod 5 is coaxially and fixedly arranged at the bottom of the discharge cover 204, and a discharging member 6 is fixedly arranged at the bottom end of the rotating rod 5. The discharging member 6 is a screw conveyor or a worm wheel blade, which can produce the effect of pushing materials when rotating. The discharging member 6 is located at the bottom end of the raw material tank 101 and penetrates into the interior of the tailings discharge pipe 103.

[0082] When the pulp concentration is relatively high, based on the above example, by adjusting the downward movement of the air outlet nozzle 208, the air outlet nozzle 208 is made closer to the discharge cover 204, thereby increasing the rotation speed of the discharge cover 204 and the material mixing effect. During the process of the air outlet nozzle 208 blowing to accelerate the rotation of the discharge cover 204, the discharge cover 204 will accelerate the rotation speed through the rotating rod 5, and then drive the discharging member 6 to accelerate the rotation in the tailings discharge pipe 103. As the discharging member 6 rotates, the tailings at the bottom of the raw material tank 101 can be effectively discharged through the tailings discharge pipe 103 at an accelerated speed.

[0083] Through the arrangement of the discharging member 6, the tailings can be quickly discharged from the tailings discharge pipe 103, thereby improving the discharge efficiency of the tailings, avoiding the accumulation of tailings at the bottom of the raw material tank 101, and further ensuring the smooth progress of the flotation work.

[0084] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An iron ore beneficiation equipment, comprising: A tank assembly, which includes a raw material tank and a concentrate tank; A frame, and the concentrate tank is fixedly arranged inside the frame; It is characterized in that it further includes: A feeding assembly, which includes a downcomer. The downcomer is fixedly arranged in the middle of the raw material tank. A Venturi tube is fixedly arranged at the top end of the downcomer. A return material cover is arranged outside the downcomer and is arranged inside the raw material tank. An outlet cover is arranged inside the return material cover and is arranged at the bottom end of the downcomer. The outlet cover is set as a hollow conical structure. A plurality of discharge grooves are circumferentially arranged at the top end of the outer side wall of the outlet cover. An extension tube is fixedly arranged at the notch of the discharge groove. A plurality of air guide tubes are circumferentially arranged at the top end of the inner side wall of the return material cover. An air outlet nozzle is fixedly arranged at the bottom end of the air guide tube. The feeding assembly can realize the input and mixing of pulp and air; The top end of the outer side wall of the return material cover is set as an inclined structure, and a plurality of return material grooves are circumferentially arranged at the top end of the outer side wall of the return material cover. A plurality of guide plates are circumferentially arranged at the top end of the outer side wall of the return material cover, and the guide plates and the return material grooves are arranged in an alternating manner; A positioning sleeve is fixedly arranged at the top end of the return material cover, and the positioning sleeve is sleeved on the middle part of the downcomer. An annular seat is arranged above the positioning sleeve, and the annular seat is fixedly arranged on the middle part of the downcomer. A plurality of telescopic rods are fixedly arranged on the outer side of the annular seat, and the movable end of each telescopic rod is fixedly arranged on the top of the positioning sleeve; A concentrate collection assembly, which can separate the concentrate and bubbles after flotation; A discharging member. A rotating rod is coaxially and fixedly arranged at the bottom of the outlet cover. The discharging member is fixedly arranged at the bottom end of the rotating rod, and the discharging member is located at the bottom end of the raw material tank. The discharging member can drive the tailings to be quickly discharged from the bottom end of the raw material tank.

2. The iron ore beneficiation equipment according to claim 1, characterized in that: Each of the air outlet nozzles is arranged at the same inclination angle, and the air outlet direction of each air outlet nozzle faces the discharge end of the corresponding extension tube. The outlet cover is rotatably arranged at the bottom end of the downcomer. The plurality of air outlet nozzles can blow the outlet cover to rotate; A limit frame is fixedly arranged at the top of the outlet cover, and a limit ring is fixedly arranged at the bottom end of the downcomer. The limit ring is rotatably arranged in the limit frame.

3. An iron ore beneficiation equipment according to claim 1, characterized in that: An air inlet pipe is fixedly arranged at the top end of the air guide tube, and the air inlet pipe is fixedly arranged at the top end of the outer side wall of the return material cover.

4. An iron ore beneficiation equipment according to claim 1, characterized in that: The concentrate collection assembly includes a fixed seat, and the fixed seat is fixedly arranged at the top end of the inner side wall of the raw material tank. A fixed shaft is rotatably arranged inside the fixed seat. A plurality of discharge plates are fixedly arranged on the outer side of the fixed shaft. A water guide pipe is arranged above the fixed shaft. A plurality of water outlet pipes are fixedly arranged at the bottom end of the water guide pipe. A water outlet nozzle is fixedly arranged at the bottom end of the water outlet pipe. A connecting pipe is fixedly arranged at the top end of the water guide pipe. An inlet pipe is fixedly arranged at the top end of the connecting pipe.

5. An iron ore beneficiation device according to claim 4, characterized in that: A positioning shaft is fixedly arranged at the top end of the water guide pipe. Both ends of the positioning shaft are movably provided with positioning ears through pin shafts, and the positioning ears are fixedly arranged at the top end of the fixed seat. A compression nut is arranged at one end of the positioning shaft through a thread, and the compression nut is in contact with the outer side wall of the positioning ear.

6. An iron ore beneficiation equipment according to claim 4, characterized in that: One end of the fixed shaft is fixedly provided with an annular gear, a driving gear is arranged outside the annular gear, a driving motor is fixedly arranged outside the driving gear, and the driving motor is fixedly arranged at the top end of the fixed seat.

7. An iron ore beneficiation equipment according to claim 1, characterized in that: A tailings discharge pipe penetrates through the bottom end of the raw material tank, the bottom end of the concentrate tank is arranged in an inclined structure, and a concentrate discharge pipe penetrates through the bottom end of the outer side wall of the concentrate tank, and the discharging member penetrates into the interior of the tailings discharge pipe.

8. A beneficiation process for an iron ore beneficiation device, applied to an iron ore beneficiation device according to any one of claims 1-7, characterized in that, It includes the following steps: Step 1, ore crushing: Use a crusher to crush the ore to be processed, and screen the crushed ore and add a flotation reagent to make pulp. Step 2, raw material injection: Transport the pulp prepared in Step 1 to the feeding assembly through a material pump, and the pulp enters the tank assembly under the guidance of the feeding assembly. During this process, the concentrate in the pulp floats to the top end of the tank assembly following the bubbles. Step 3, ore dressing: The concentrate floats to one side of the concentrate collection assembly following the bubbles, and enters the concentrate tank of the tank assembly under the guidance of the concentrate collection assembly, and the remaining pulp circulates in the tank assembly. Step 4, tailings discharge: After the pulp circulates in the tank assembly for multiple times, the concentrate in the pulp completes ore dressing, and the remaining tailings are discharged from the bottom of the tank assembly, and the iron ore dressing can be completed.

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