Iron ore beneficiation process and iron ore beneficiation equipment

Abstract

The invention discloses an iron ore beneficiation process and beneficiation equipment thereof, and relates to the technical field of beneficiation equipment, and the iron ore beneficiation equipment comprises a groove body assembly, a feeding assembly, a concentrate collecting assembly and a rack. The invention further discloses a beneficiation process of the iron ore beneficiation equipment. The beneficiation process comprises the following steps of ore crushing, raw material injection, beneficiation and tailing discharging. According to the iron ore flotation device, the groove body assembly is arranged, the feeding assembly is arranged in the middle of the groove body assembly, the concentrate collecting assembly is arranged at the top end of the groove body assembly, the feeding assembly can achieve injection of ore pulp, and the feeding assembly is matched with the groove body assembly, so that the flotation effect on iron ore can be achieved; and the concentrate collecting assembly can scrape floating concentrate and bubbles into the concentrate tank and spray the concentrate and bubbles in the concentrate tank, so that separation of the concentrate is achieved, washing of the concentrate is achieved while separation of the concentrate is achieved, and the beneficiation efficiency of the device is improved.

Description

Technical Field

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

[0002] There are many types of iron ores. Generally, the process of strong magnetic separation, sulfide flotation and iron ore flotation is adopted, which can recover most of the high-quality concentrates and reduce the discharge of iron tailings and the storage pressure of the tailings pond.

[0003] The patent document with the publication number CN213727156U discloses a flotation machine for separating iron concentrate from metallic iron ore slag, which belongs to the field of mineral processing equipment. A flotation machine for separating iron concentrate from metallic iron ore slag comprises a flotation box, in which a flotation device is arranged, and a screening box, a material guide pipe is connected between the screening box and the flotation box, a plurality of nozzles are arranged in the material guide pipe, and a water spray pipe is arranged on each nozzle, a feed port is arranged on the screening box, a fixed plate is rotatably connected in the screening box, a filter screen is arranged on the fixed plate, a fixed block is arranged in the screening box, a spring is fixedly connected to the fixed block, and one end of the spring away from the fixed block is fixedly connected to the fixed plate, a driving motor is arranged on the side wall of the screening box, and a first rotating shaft is fixedly connected to the output end of the driving motor; the patent facilitates the screening of iron powder through the arrangement of springs, cams, and filter screens, and the arrangement of the drainage mechanism, the water spray pipe, and the nozzle facilitates the flushing of the iron powder in the material guide pipe.

[0004] The above technical solution has some problems in practical application. This technical solution only performs mineral processing by screening the iron powder and then washing it. The mineral processing efficiency is low and it is difficult to achieve a high flotation accuracy. In addition, the existing similar iron ore flotation machines are not convenient for repeated circulation flotation of the ore when used. During the flotation process, it is impossible to ensure that enough air is mixed into the ore and the ore enters the raw material tank in a relatively dispersed state for flotation, which leads to a reduction in the flotation effect and affects the flotation efficiency. At the same time, the tailings generated during the flotation process are easily accumulated at the bottom of the raw material tank, which affects the subsequent continuous flotation work.

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

[0006] The object of the present invention is to provide an iron ore dressing process and a dressing equipment thereof to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an iron ore dressing device, comprising:

[0008] A tank assembly, comprising a raw material tank and a fine material tank, wherein the fine material tank is disposed around the outer top end of the raw material tank;

[0009] A frame, wherein the concentrate trough is fixedly arranged inside the frame;

[0010] Also includes:

[0011] A feeding assembly, comprising a lower punch pipe, the lower punch pipe is fixedly arranged in the middle of a raw material tank, a venturi tube is fixedly arranged at the top of the lower punch pipe, a return cover is arranged on the outer side of the lower punch pipe, and the return cover is arranged inside the raw material tank, a discharge cover is arranged inside the return cover, and the discharge cover is arranged at the bottom end of the lower punch pipe, the discharge cover is arranged as a hollow conical structure, a plurality of discharge troughs are arranged around the top of the outer wall of the discharge cover, an extension pipe is fixedly arranged at the notch of the discharge trough, a plurality of air guide pipes are arranged around the top of the inner wall of the return cover, and an air outlet nozzle is fixedly arranged at the bottom end of the air guide pipe, and the feeding assembly can realize the input and mixing of slurry and air;

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

[0013] A discharge piece is coaxially fixed with a rotating rod at the bottom of the discharge cover, the discharge piece is fixed at the bottom end of the rotating rod, and the discharge piece is located at the bottom end of the raw material trough. The discharge piece can drive the tailings to be discharged quickly from the bottom end of the raw material trough.

[0014] Preferably, each of the air outlet nozzles is arranged at the same inclination angle, the air outlet direction of each of the air outlet nozzles is toward the discharge end of the corresponding extension tube, the discharge hood is rotatably arranged at the bottom end of the lower punch tube, and multiple air outlet nozzles can blow the discharge hood to rotate, a limit frame is fixedly arranged on the top of the discharge hood, and a limit ring is fixedly arranged at the bottom end of the lower punch tube, and the limit ring is rotatably arranged in the limit 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 cover.

[0016] Preferably, the top of the outer wall of the return material cover is arranged as an inclined structure, and a plurality of return material troughs are arranged around the top of the outer wall of the return material cover, a plurality of guide plates are arranged around the top of the outer wall of the return material cover, and the guide plates and the return material troughs are arranged in an alternating manner.

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

[0018] Preferably, the concentrate collection assembly includes a fixed seat, and the fixed seat is fixedly arranged at the top of the inner wall of the raw material trough, 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 pipe is arranged above the fixed shaft, a plurality of water outlet pipes are fixedly arranged at the bottom end of the water 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 pipe, and a water inlet pipe is fixedly arranged at the top end of the connecting pipe.

[0019] Preferably, a positioning shaft is fixedly provided at the top of the water pipe, positioning ears are movably provided at both ends of the positioning shaft through a pin shaft, and the positioning ears are fixed to the top of the fixing seat, and a clamping nut is threadedly provided at one end of the positioning shaft, and the clamping nut is fitted with the outer wall of the positioning ear.

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

[0021] Preferably, a tailings discharge pipe is provided through the bottom end of the raw material trough, the bottom end of the concentrate trough is arranged as an inclined structure, and a concentrate discharge pipe is provided through the bottom end of the outer wall of the concentrate trough, and the discharge piece passes through the interior of the tailings discharge pipe.

[0022] A ore dressing process of an iron ore dressing device comprises the following steps:

[0023] Step 1: Ore crushing: Use a crusher to crush the ore to be processed, and then sieve the crushed ore and add flotation reagent to make slurry;

[0024] Step 2: Raw material injection: The slurry prepared in step 1 is transported to the feeding assembly through a material pump. The slurry enters the tank assembly under the guidance of the feeding assembly. During this process, the concentrate in the slurry floats to the top of the tank assembly along with the bubbles.

[0025] Step 3: Ore dressing: the concentrate follows the bubbles and floats to one side of the concentrate collection assembly, and enters the concentrate tank of the tank assembly under the guidance of the concentrate collection assembly, and the remaining slurry circulates in the tank assembly;

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

[0027] Technical effects and advantages of the present invention:

[0028] 1. The present invention provides a tank assembly, a feeding assembly is provided in the middle of the tank assembly, and a concentrate collecting assembly is provided at the top of the tank assembly. The feeding assembly can realize the injection of slurry. The feeding assembly cooperates with the tank assembly to achieve the flotation effect of iron ore, and the concentrate collecting assembly can discharge the slurry after flotation to achieve the flotation and separation of iron ore. The concentrate collecting assembly cooperates with the feeding assembly to achieve the beneficiation of iron ore to ensure the beneficiation accuracy of the device;

[0029] 2. The present invention provides a feeding assembly, which includes a lower punch pipe, and a return cover is provided on the outer side of the lower punch pipe. The slurry is guided into the return cover through the lower punch pipe. A plurality of air guide pipes are provided inside the return cover, and the air guide pipes can realize additional injection of air to guide the movement direction of the slurry, thereby ensuring that the slurry and air are mixed to generate bubbles while controlling the movement direction of the slurry. A return trough is provided at the top of the return cover, and the slurry can be circulated inside the device, thereby repeatedly flotating the slurry, improving the flotation effect of the slurry, so that the concentrate collection component can separate the iron ore in the slurry, thereby improving the ore dressing efficiency and accuracy of the device;

[0030] 3. The present invention provides a concentrate collection component, which includes a discharge plate and a water outlet. The discharge plate scrapes the concentrate and bubbles floating around it into the concentrate tank. At this time, the water outlet pipe sprays clean water through the water outlet. The clean water sprays the concentrate and bubbles in the concentrate tank to separate the concentrate. While separating the concentrate, the concentrate is washed to improve the mineral processing efficiency of the device.

[0031] 4. The present invention tilts the air guide pipe and the air outlet nozzle toward the discharge end of the corresponding extension pipe, and rotatably arranges the discharge cover at the bottom end of the lower punch pipe, so that when the slurry with a high concentration is floated, the air blown from the air outlet nozzle is directly blown to the discharge end of the extension pipe and drives the discharge cover to rotate, which not only allows the slurry in the discharge cover to be easily and quickly discharged under the action of centrifugal force, but also helps more air to be mixed into the slurry, thereby increasing the air content in the slurry. At the same time, the slurry discharged from the discharge end of the extension pipe is blown away, so that the slurry mixed with sufficient air enters the raw material tank in a more dispersed state, thereby generating more bubbles to ensure the smooth progress of the flotation work;

[0032] 5. The present invention improves the sorting effect by setting the discharge piece, and at the same time, 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 tank, and further ensuring the smooth progress of the flotation work. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2 It is a front schematic diagram of the overall structure of the present invention.

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

[0036] Figure 4 It is a schematic cross-sectional view of the overall structure of the device of the present invention.

[0037] Figure 5 The structure of the concentrate collection assembly of the present invention is schematically shown. Figure 1 .

[0038] Figure 6 The structure of the concentrate collection assembly of the present invention is schematically shown. Figure 2 .

[0039] Figure 7 It is a schematic diagram of the structure of the feeding assembly of the present invention.

[0040] Figure 8 It is a bottom view schematic diagram of the feeding assembly structure of the present invention.

[0041] Fig. 9 It is a schematic cross-sectional view of the feeding assembly structure of the present invention.

[0042] Fig.10 It is a schematic diagram of the installation position of the discharge piece of the present invention.

[0043] Fig.11 For the present invention Fig.10 A magnified schematic diagram of center A.

[0044] Fig.12 It is a schematic diagram of the installation of the air guide tube of the present invention.

[0045] Fig.13 It is a rotation trajectory diagram of the discharge cover of the present invention.

[0046] In the figure: 1, tank assembly; 2, feeding assembly; 3, concentrate collection assembly; 4, frame; 5, rotating rod; 6, discharge piece; 101, raw material tank; 102, concentrate tank; 103, tailings discharge pipe; 104, concentrate discharge pipe; 201, downpipe; 202, venturi; 203, return cover; 204, discharge cover; 205, discharge tank; 206, extension pipe; 207, air guide pipe; 208, air outlet nozzle; 209, air inlet pipe; 210, return tank; 211, 1. Guide plate; 212. Positioning sleeve; 213. Ring 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. Pressing nut; 312. Ring gear; 313. Driving gear; 314. Driving motor. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0048] Embodiment 1, the present invention provides as follows Figures 1 to 9 An iron ore beneficiation equipment shown includes a trough body assembly 1, a feeding assembly 2, a concentrate collecting assembly 3 and a frame 4. The feeding assembly 2 is arranged inside the trough body assembly 1, and the concentrate collecting assembly 3 is provided with multiple groups, and the multiple groups of concentrate collecting assemblies 3 are arranged around the top of the trough body assembly 1. The trough body assembly 1, the feeding assembly 2 and the concentrate collecting assembly 3 are all arranged inside the frame 4.

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

[0050] A tailings discharge pipe 103 is provided through the bottom end of the raw material tank 101 , the bottom end of the concentrate tank 102 is provided with an inclined structure, and a concentrate discharge pipe 104 is provided through the bottom end of the outer wall of the concentrate tank 102 .

[0051] The feeding assembly 2 includes a lower punch pipe 201, which is fixedly arranged in the middle of the raw material tank 101. A venturi tube 202 is fixedly arranged at the top of the lower punch pipe 201. The venturi tube 202 is used to guide the outside air to mix with the ore pulp.

[0052] Specifically, a return cover 203 is provided on the outer side of the lower punch 201, and the return cover 203 is provided inside the raw material trough 101. A discharge cover 204 is provided inside the return cover 203, and the discharge cover 204 is provided at the bottom end of the lower punch 201. The discharge cover 204 can guide and discharge the raw materials.

[0053] More specifically, the discharge hood 204 is configured as a hollow conical structure, and a plurality of discharge troughs 205 are arranged around the top of the outer wall of the discharge hood 204, and an extension tube 206 is fixedly arranged at the notch of the discharge trough 205, and a plurality of air guide pipes 207 are arranged around the top of the inner wall of the return hood 203, and 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, and an air inlet pipe 209 is fixedly arranged at the top of the air guide pipe 207, and the air inlet pipe 209 is fixedly arranged at the top of the outer wall of the return hood 203, and the air inlet pipe 209 can be connected to an external air pump to realize gas injection.

[0054] In addition, the top of the outer wall of the return material cover 203 is arranged as an inclined structure, and a plurality of return material troughs 210 are arranged around the top of the outer wall of the return material cover 203. A plurality of guide plates 211 are arranged around the top of the outer wall of the return material cover 203, and the guide plates 211 and the return material troughs 210 are arranged in an alternating manner. The guide plates 211 can guide the slurry, and when the slurry enters the return material troughs 210, it first moves along the surface of the guide plates 211. During this process, the concentrate and bubbles in the slurry can adhere to the surface of the guide plates 211 to reduce the amount of concentrate entering the return material cover 203, thereby achieving the effect of auxiliary mineral processing.

[0055] Moreover, a positioning sleeve 212 is fixedly provided at the top of the return cover 203, and the positioning sleeve 212 is sleeved and arranged in the middle part of the lower punch 201, an annular seat 213 is provided above the positioning sleeve 212, and the annular seat 213 is fixedly provided in the middle part of the lower punch 201, and a plurality of telescopic rods 214 are fixedly provided on the outer side of the annular seat 213, and the telescopic rods 214 can be electric telescopic rods, or hydraulic or pneumatic telescopic rods, so as to realize automatic control; and the movable end of each telescopic rod 214 is fixedly provided at the top of the positioning sleeve 212, and the telescopic rod 214 is connected to the controller signal of the equipment, and the position between the positioning sleeve 212 and the annular seat 213 is adjusted by adjusting the telescopic amount of the telescopic rod 214 by the controller, so as to realize the adjustment of the height of the return cover 203, so as to control whether the slurry circulates inside the device.

[0056] It should be noted that when the slurry concentration is low, the content of concentrate that needs to be floated in the slurry is also relatively low. At this time, the number of bubbles generated after the slurry is mixed with air can fully meet the flotation of the concentrate in the slurry. The concentrate in the slurry can better follow the bubbles to float to the top of the raw material tank 101. Therefore, there is no need to perform secondary flotation on the slurry on the upper part of the raw material tank 101, and the requirement for the content of injected air is also relatively low at this time. Therefore, the controller controls the telescopic rod 214 to shorten, so as to raise the height of the return cover 203, so that the height of the return trough 210 is above the slurry liquid level at the top of the raw material tank 101. At this time, the slurry at the top of the raw material tank 101 will not be able to pass through the return trough 210 to re-enter the return cover 203, and therefore cannot return to the bottom of the raw material tank 101 through the return cover 203 for secondary flotation, thereby reducing the flotation burden, avoiding unnecessary flotation work, and improving flotation efficiency.

[0057] When the ore pulp concentration is high, the content of concentrate that needs to be floated in the ore pulp is also relatively high. At this time, it is necessary to mix more air into the ore pulp to achieve the purpose of generating more bubbles. In addition, due to the high ore pulp concentration, the ore pulp at the upper part of the raw material tank 101 still contains concentrate that is not completely floated. At this time, it is necessary to perform secondary floatation on this part of the ore pulp, otherwise it will lead to a waste of raw materials and affect the flotation accuracy. Therefore, the controller controls the extension of the telescopic rod 214 to lower the height of the return cover 203, so that the return trough 210 is completely in the ore pulp at the upper part of the raw material tank 101. At this time, the ore pulp at the top of the raw material tank 101 will enter the return cover 203 through the return trough 210, and the ore in the return cover 203 will be The return cover 203 moves downward under the guidance of the slurry movement, thereby realizing the circulation of the slurry in the raw material tank 101, and then realizing the purpose of re-flotation, so as to achieve the purpose of improving the flotation accuracy. When the height of the return cover 203 is lowered, the air outlet nozzle 208 is synchronously lowered. At this time, the distance between the air outlet nozzle 208 and the discharge cover 204 is shortened, so that the air blown out by the air outlet nozzle 208 can be more directly blown onto the slurry at the bottom of the raw material tank 101, so that more air is mixed into the slurry, thereby increasing the amount of bubbles generated. At the same time, since the force of the gas blown onto the slurry is relatively large, the guiding effect of the air on the slurry will become stronger, so that the slurry can move downward faster, which is conducive to the flotation of the slurry at the bottom of the raw material tank 101.

[0058] The concentrate collecting assembly 3 includes a fixing seat 301 , and the fixing seat 301 is fixedly disposed on the top of the inner wall of the raw material tank 101 .

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

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

[0061] Moreover, a connecting pipe 307 is fixedly provided at the top of the water pipe 304, a water inlet pipe 308 is fixedly provided at the top of the connecting pipe 307, a positioning shaft 309 is fixedly provided at the top of the water pipe 304, both ends of the positioning shaft 309 are movably provided with positioning ears 310 through pin shafts, and the positioning ears 310 are fixedly provided at the top of the fixing seat 301, one end of the positioning shaft 309 is threadedly provided with a clamping nut 311, and the clamping nut 311 is fitted with the outer wall of the positioning ear 310, the clamping nut 311 can fix the position of the positioning shaft 309, thereby fixing the angle of the water outlet pipe 305.

[0062] At the same time, a ring gear 312 is fixedly provided at one end of the fixed shaft 302, a driving gear 313 is provided on the outer side of the ring gear 312, a driving motor 314 is fixedly provided on the outer side of the driving gear 313, and the driving motor 314 is fixedly provided at the top end of the fixed base 301, and the driving motor 314 is used to drive the fixed shaft 302 to rotate.

[0063] In summary, the device can realize the injection of slurry through the feeding component 2. After the slurry enters the trough component 1, the iron ore concentrate in the slurry can float up following the bubbles to achieve the flotation effect. When the concentrate moves to the top of the trough component 1 following the bubbles, the concentrate collecting component 3 can scrape the concentrate and bubbles floating around it. The iron ore concentrate follows the concentrate collecting component 3 to move to the concentrate trough 102 of the trough component 1, and completes the mineral processing after being rinsed with clean water. The remaining slurry circulates inside the trough component 1, and completes the mineral processing operation under the discharge action of the concentrate collecting component 3.

[0064] When the feeding component 2 is conveying the slurry, the slurry is conveyed to the lower flushing pipe 201 through the material pump. When the slurry passes through the lower flushing pipe 201, the outside air is drawn into the lower flushing pipe 201 under the action of the venturi 202 and mixed with the slurry. Bubbles are generated after the slurry and air are mixed. When the slurry moves to the discharge hood 204 at the bottom of the lower flushing pipe 201, the slurry and the bubbles are discharged into the return hood 203 along the discharge trough 205 outside the discharge hood 204. At this time, the gas in the air guide pipe 207 is discharged downward through the air outlet nozzle 208. The gas pushes the slurry to move downward, so that the slurry moves to the bottom of the return hood 203. At this time, the concentrate in the slurry floats to the top of the raw material tank 101 following the bubbles. In the mineral processing process, the slurry in the middle of the top of the raw material tank 101 can pass through the return trough 210 into the return hood 203, and moves downward under the guidance of the slurry movement in the return hood 203, so as to realize the circulation of the slurry.

[0065] When the concentrate moves to the top of the raw material trough 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 that float up to its surroundings into the concentrate trough 102. At this time, the water outlet pipe 305 sprays clean water through the water outlet nozzle 306, and the clean water sprays the concentrate and bubbles in the concentrate trough 102 to achieve separation of the concentrate.

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

[0067] Step 1: Ore crushing: Use a crusher to crush the ore to be processed, and then sieve the crushed ore and add flotation agents to make slurry.

[0068] The ore crushing equipment can be a series of mineral crushing machinery such as jaw crusher and ball mill. The ore is screened after crushing to ensure that the particle size of the ore meets the mineral processing standards.

[0069] Step 2: Raw material injection: The slurry prepared in step 1 is transported to the feeding component 2 through a material pump. The slurry enters the tank component 1 under the guidance of the feeding component 2. During this process, the concentrate in the slurry floats to the top of the tank component 1 along with the bubbles.

[0070] The feeding assembly 2 can inject air while conveying the slurry to ensure that bubbles are formed inside the slurry.

[0071] Step three, mineral processing, the concentrate follows the bubbles and floats to the vicinity of the concentrate collecting component 3, and enters the concentrate trough 102 of the trough component 1 under the scraping of the concentrate collecting component 3, and the remaining slurry circulates in the trough component 1. At the same time, the concentrate and bubbles in the concentrate trough 102 are sprayed with clean water to achieve separation of the concentrate.

[0072] Step 4: tailings discharge. After the slurry circulates in the tank assembly 1 for multiple times, the concentrate in the slurry completes the beneficiation, and the remaining tailings are discharged from the bottom of the tank assembly 1, thus completing the beneficiation of the iron ore.

[0073] Embodiment 2. In the above embodiment, the flotation effect of the iron ore can be achieved by cooperating with the feeding assembly 2 and the trough assembly 1. At the same time, the concentrate collecting assembly 3 can discharge the slurry after flotation to achieve the flotation and separation of the iron ore, and the air guide pipe 207 can realize the additional injection of air to guide the movement direction of the slurry, thereby ensuring that the slurry and air are mixed to produce bubbles while controlling the movement direction of the slurry. The return trough 210 allows the slurry to circulate inside the device, so that the concentrate collecting assembly 3 can separate the iron ore in the slurry, thereby improving the mineral processing efficiency and accuracy of the device.

[0074] However, during the flotation process, since the concentration of the slurry is not fixed, when the slurry concentration is low, the slurry can be easily and quickly discharged from the discharge hood 204 through the discharge trough 205 and the extension pipe 206, and since the concentrate content in the slurry is low, the amount of air required to mix into the slurry is also relatively small. Therefore, the downward-facing air outlet nozzle 208 and the discharge hood 204 set in the above embodiment are sufficient to meet the flotation requirements in this state. When the concentration of the ore pulp is high, the speed of the ore pulp passing through the discharge trough 205 and the extension tube 206 will be relatively slow, that is, at this time, the ore pulp with a high concentration is relatively difficult to be discharged from the discharge cover 204 through the discharge trough 205 and the extension tube 206, and at this time, due to the high content of concentrate in the ore pulp, more bubbles need to be generated to float the concentrate, which requires more air to be mixed into the ore pulp, and the downward-facing air outlet nozzle 208 set in the above embodiment can only blow air into the ore pulp at the bottom of the raw material trough 101. Although this can promote the mixing of air into the ore pulp at the bottom of the raw material trough 101 to a certain extent, the amount of air mixed into the ore pulp is limited, and it is impossible to directly blow air into the ore pulp discharged from the discharge cover 204 for mixing, resulting in poor mixing effect of air and ore pulp, and it is impossible to ensure that sufficient bubbles are generated to meet the flotation requirements. Therefore, the scheme of the present invention is further improved so that when flotation is performed on a slurry with a high concentration, the slurry can be easily and quickly discharged from the discharge hood 204, and the dispersion of the ore when it is discharged from the discharge hood 204 can be improved, thereby effectively improving the mixing effect of air and slurry, and ensuring that sufficient bubbles can be generated for the smooth progress of flotation.

[0075] Specifically, Figure 10-13 As shown, each air guide pipe 207 and air outlet nozzle 208 are inclined in the same direction, and the air outlet direction of each air outlet nozzle 208 is toward the discharge end of the corresponding extension tube 206 .

[0076] At the same time, the discharge hood 204 is rotatably set at the bottom end of the lower punch tube 201, and multiple air outlet nozzles 208 can blow the discharge hood 204 to rotate. A limit frame 215 is fixedly set on the top of the discharge hood 204, and a limit ring 216 is fixedly set at the bottom end of the lower punch tube 201. The limit ring 216 is rotatably set in the limit frame 215, so that the discharge hood 204 can rotate at the bottom end of the lower punch tube 201, and the discharge hood 204 and the lower punch tube 201 will not move up and down relative to each other.

[0077] It should be noted that when multiple air guide pipes 207 blow air outward through the air outlet nozzles 208 at the same time, a vortex-shaped airflow can be formed, and the blown gas will act on the discharge end of the extension tube 206. On the one hand, the gas pressure can push the discharge hood 204 to rotate at the bottom end of the lower punch 201. On the other hand, since the gas is directly blown to the discharge end of the extension tube 206, the air can be blown to the slurry discharged from the discharge end of the extension tube 206, thereby improving the mixing effect of air into the slurry. At the same time, the air can also disperse the slurry discharged from the extension tube 206, so that the slurry mixed with air can enter the raw material trough 101 in a more dispersed state, thereby improving the dispersion of the ore when it descends.

[0078] When flotation is performed on a slurry with a relatively high concentration, the controller is used to move the return cover 203 downward. On the one hand, the circulation of the slurry at the top of the raw material tank 101 can be realized, so as to achieve the effect of repeated flotation of the slurry. On the other hand, the return cover 203 drives the multiple air outlet nozzles 208 to move downward synchronously, so that the air outlet nozzles 208 are closer to the discharge cover 204. At this time, the air pressure blown out from the air outlet nozzles 208 and acting on the discharge end of the extension tube 206 will increase accordingly. Under the impetus of the air pressure, the discharge cover 204 will rotate rapidly at the bottom of the lower punch 201, so that the slurry in the discharge cover 204 generates centrifugal force, which is helpful for the ore to flow out. The slurry is discharged easily and quickly from the extension tube 206, and since the air pressure blown toward the discharge end of the extension tube 206 increases, that is, the air pressure directly blown toward the slurry discharged from the discharge end of the extension tube 206 becomes larger, this will help more air to mix into the slurry, thereby increasing the amount of air mixed in the slurry, thereby achieving the purpose of generating more bubbles. At the same time, while mixing air into the slurry, the air also disperses the slurry discharged from the discharge end of the extension tube 206, so that the slurry mixed with air can enter the raw material tank 101 in a more dispersed state, thereby increasing the dispersion of the slurry when it falls into the raw material tank 101, thereby improving the flotation effect.

[0079] By tilting the air guide pipe 207 and the air outlet nozzle 208 toward the discharge end of the corresponding extension pipe 206, and rotating the discharge cover 204 at the bottom end of the lower punch 201, when flotation is performed on slurry with a higher concentration, the air blown out from the air outlet nozzle 208 is directly blown toward the discharge end of the extension pipe 206 and drives the discharge cover 204 to rotate. This not only allows the slurry in the discharge cover 204 to be easily and quickly discharged under the action of centrifugal force, but also helps to mix more air into the slurry, thereby increasing the air content in the slurry. At the same time, the slurry discharged from the discharge end of the extension pipe 206 is blown away, so that the slurry 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] Embodiment 3, in the above embodiment, when flotation is performed on a slurry with a high concentration, the amount of tailings generated is also relatively high, and 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 subsequent flotation work. Therefore, based on the above embodiment, the scheme of the present invention is further improved, so that the tailings can be discharged in time and quickly 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, Fig.10 and Fig.12 As shown, a rotating rod 5 is coaxially fixedly arranged at the bottom of the discharge cover 204, and a discharge member 6 is fixedly arranged at the bottom end of the rotating rod 5. The discharge member 6 is a screw or worm blade, which can produce the effect of pushing materials when rotating. The discharge member 6 is located at the bottom end of the raw material tank 101 and penetrates into the tailings discharge pipe 103.

[0082] When the slurry concentration is high, based on the above embodiment, by adjusting the downward movement of the air outlet nozzle 208, the air outlet nozzle 208 is brought close to the discharge cover 204, thereby increasing the rotation speed and material mixing effect of the discharge cover 204. In the process of the air outlet nozzle 208 blowing the discharge cover 204 to accelerate the rotation, the discharge cover 204 will accelerate the rotation speed through the rotating rod 5, thereby driving the discharge member 6 to accelerate the rotation in the tailings discharge pipe 103, and with the rotation of the discharge member 6, the tailings at the bottom of the raw material tank 101 can be effectively discharged through the tailings discharge pipe 103.

[0083] By setting the discharge 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 is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An iron ore dressing equipment, comprising: A tank assembly (1), comprising a raw material tank (101) and a concentrate tank (102); A frame (4), wherein the concentrate trough (102) is fixedly arranged inside the frame (4); It is characterized by further comprising: A feeding assembly (2) comprises a lower punch pipe (201), the lower punch pipe (201) being fixedly arranged in the middle of a raw material tank (101), a venturi tube (202) being fixedly arranged at the top of the lower punch pipe (201), a return cover (203) being arranged on the outer side of the lower punch pipe (201), and the return cover (203) being arranged inside the raw material tank (101), and a discharge cover (204) being arranged inside the return cover (203), and the discharge cover (204) being arranged on the lower punch pipe (201). ), the discharge cover (204) is configured as a hollow conical structure, a plurality of discharge troughs (205) are arranged around the top of the outer wall of the discharge cover (204), an extension pipe (206) is fixedly arranged at the notch of the discharge trough (205), a plurality of air guide pipes (207) are arranged around the top of the inner wall of the return cover (203), an air outlet nozzle (208) is fixedly arranged at the bottom end of the air guide pipe (207), and the feeding assembly (2) can realize the input and mixing of slurry and air; A concentrate collecting assembly (3) capable of separating the concentrate and bubbles after flotation; A discharge piece (6), a rotating rod (5) is coaxially fixedly arranged at the bottom of the discharge cover (204), the discharge piece (6) is fixedly arranged at the bottom end of the rotating rod (5), and the discharge piece (6) is located at the bottom end of the raw material trough (101), and the discharge piece (6) can drive the tailings to be discharged quickly from the bottom end of the raw material trough (101).

2. The iron ore dressing equipment according to claim 1, characterized in that: Each of the air outlet nozzles (208) is arranged at the same inclination angle, and the air outlet direction of each of the air outlet nozzles (208) is toward the discharge end of the corresponding extension tube (206); the discharge cover (204) is rotatably arranged at the bottom end of the lower punch tube (201), and the multiple air outlet nozzles (208) can blow the discharge cover (204) to rotate; a limit frame (215) is fixedly arranged at the top of the discharge cover (204), and a limit ring (216) is fixedly arranged at the bottom end of the lower punch tube (201), and the limit ring (216) is rotatably arranged in the limit frame (215).

3. The iron ore dressing equipment according to claim 1, characterized in that: 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 wall of the return cover (203).

4. The iron ore dressing equipment according to claim 1, characterized in that: The top end of the outer wall of the return material cover (203) is arranged as an inclined structure, and a plurality of return material troughs (210) are arranged around the top end of the outer wall of the return material cover (203), and a plurality of guide plates (211) are arranged around the top end of the outer wall of the return material cover (203), and the guide plates (211) and the return material troughs (210) are arranged in a staggered manner.

5. The iron ore dressing equipment according to claim 1, characterized in that: A positioning sleeve (212) is fixedly arranged at the top of the return cover (203), and the positioning sleeve (212) is sleeved and arranged in the middle of the lower punch (201); an annular seat (213) is arranged above the positioning sleeve (212), and the annular seat (213) is fixedly arranged in the middle of the lower punch (201); a plurality of telescopic rods (214) are fixedly arranged on the outer side of the annular seat (213), and the movable end of each telescopic rod (214) is fixedly arranged on the top of the positioning sleeve (212).

6. The iron ore dressing equipment according to claim 1, characterized in that: The concentrate collection assembly (3) comprises a fixed seat (301), and the fixed seat (301) is fixedly arranged at the top of the inner wall of the raw material trough (101), a fixed shaft (302) is rotatably arranged inside the fixed seat (301), a plurality of discharge plates (303) are fixedly arranged outside the fixed shaft (302), 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), a connecting pipe (307) is fixedly arranged at the top end of the water guide pipe (304), and a water inlet pipe (308) is fixedly arranged at the top end of the connecting pipe (307).

7. The iron ore dressing equipment according to claim 6, characterized in that: A positioning shaft (309) is fixedly provided at the top end of the water pipe (304), and positioning ears (310) are movably provided at both ends of the positioning shaft (309) through pins, and the positioning ears (310) are fixedly provided at the top end of the fixing seat (301), and a clamping nut (311) is threadedly provided at one end of the positioning shaft (309), and the clamping nut (311) is in contact with the outer wall of the positioning ear (310).

8. The iron ore dressing equipment according to claim 6, characterized in that: A ring gear (312) is fixedly arranged at one end of the fixed shaft (302), a driving gear (313) is arranged on the outer side of the ring gear (312), a driving motor (314) is fixedly arranged on the outer side of the driving gear (313), and the driving motor (314) is fixedly arranged at the top end of the fixed seat (301).

9. The iron ore dressing equipment according to claim 1, characterized in that: A tailings discharge pipe (103) is provided through the bottom end of the raw material trough (101), the bottom end of the concentrate trough (102) is arranged as an inclined structure, and a concentrate discharge pipe (104) is provided through the bottom end of the outer wall of the concentrate trough (102), and the discharge member (6) passes through the interior of the tailings discharge pipe (103).

10. A beneficiation process for an iron ore beneficiation device, applied to an iron ore beneficiation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Ore crushing: Use a crusher to crush the ore to be processed, and then sieve the crushed ore and add flotation reagent to make slurry; Step 2: Raw material injection: the ore slurry prepared in step 1 is transported to the feeding component (2) through a material pump. The ore slurry enters the tank component (1) under the guidance of the feeding component (2). During this process, the concentrate in the ore slurry floats to the top of the tank component (1) along with the bubbles. Step 3, ore dressing, the concentrate follows the bubbles and floats to one side of the concentrate collecting assembly (3), and enters the concentrate tank (102) of the tank assembly (1) under the guidance of the concentrate collecting assembly (3), and the remaining slurry circulates in the tank assembly (1); Step 4: tailings discharge. After the slurry circulates in the tank assembly (1) for multiple times, the concentrate in the slurry is beneficiated, and the remaining tailings are discharged from the bottom of the tank assembly (1), thus completing the beneficiation of the iron ore.

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