Dry separation equipment based on CTX magnetic drum

Abstract

This invention relates to the technical field of magnetic separation, and provides a dry separation device based on a CTX magnetic drum, including a conveyor belt and a cleaning mechanism. The upstream end of the conveyor belt has a feed inlet, and the downstream end has a concentrate inlet. The cleaning mechanism includes at least a magnetic pulley, a cleaning CTX magnetic drum, and a first conveyor belt. The magnetic pulley is used for roughing the ore on the conveyor belt to obtain rough concentrate and rough tailings. The first conveyor belt is wound around the magnetic pulley and the cleaning CTX magnetic drum, and is used to transport the rough concentrate to the cleaning CTX magnetic drum. The cleaning CTX magnetic drum is used to process the rough concentrate to obtain clean tailings and clean concentrate, and is also used to transport the clean concentrate back to the conveyor belt. This invention provides a dry separation device based on a CTX magnetic drum, which enables the dry separation to be performed on the conveyor belt, followed by the transport of the dry-separated concentrate to a powder bin on the same conveyor belt.

Description

Technical Field

[0001] This invention relates to the technical field of magnetic separation, and more particularly to a dry separation device based on a CTX magnetic drum. Background Technology

[0002] With the increasing amount of iron ore mining, there is a growing amount of lean and ultra-lean iron ore. In order to improve the grade of iron ore entering the mill and reduce grinding costs, a pre-dry magnetic separation process is usually used to remove waste before the iron ore enters the mill, thereby improving the grade of the ore entering the mill and reducing the cost of mineral processing.

[0003] The commonly used dry separation process is one or more dry separations, which involves subjecting the coarse and / or medium and / or fine crushed ore obtained from the crushing process to one or more dry separations to obtain dry separation concentrate and dry separation tailings. The dry separation concentrate is used as the ore to be ground, and the dry separation tailings are discarded.

[0004] The CTX magnetic drum has a magnetic wrap angle of 360°, an outer cylinder surface magnetic field strength ≥0.4T, a sorting belt speed ≥2.5m / s, and a magnetic system rotation speed ≥80r / min. The outer cylinder and magnetic system rotate in opposite directions, forming a rotating magnetic field. When magnetic ore particles pass through, they undergo rapid magnetic reversal and agitation in the alternating zones. Non-magnetic (weakly magnetic) waste rock particles sandwiched between the magnetic ore particles are agitated and move outwards under the combined action of magnetic force, centrifugal force, and gravity. Meanwhile, magnetic ore particles sandwiched between non-magnetic (weakly magnetic) waste rock particles move inwards due to the strong magnetic force. Thus, under the combined action of magnetic force, gravity, and centrifugal force, highly efficient separation of magnetic ore particles and non-magnetic (weakly magnetic) waste rock particles is achieved. This effectively removes non-magnetic (weakly magnetic) particles sandwiched between magnetic particles, resulting in high-grade dry concentrate and low-grade dry tailings with excellent separation effect.

[0005] As a typical representative of third-generation dry magnetic separators, the CTX magnetic drum has been widely used in industrial production to replace CT, CTDG, or CTL type dry magnetic separators. The CTX magnetic drum removes a large amount of qualified tailings, reducing grinding and beneficiation costs, thereby significantly lowering mineral processing production costs. It also reduces the amount of fine tailings entering tailings ponds, extending the service life of tailings ponds, and provides high utilization value for coarse tailings, thus achieving cost reduction and efficiency improvement for mineral processing plants.

[0006] In early-built concentrators, because dry magnetic separation systems were not designed and built simultaneously, or because the number of dry magnetic separators used in the early-designed dry magnetic separation systems was too large, or because the separation belts used in the dry magnetic separators were too long, or because the installation angle of the dry magnetic separators was too large when running upwards, it is not suitable to use CTX magnetic drums for direct dry magnetic separation upgrades.

[0007] To address the problems existing in the modification of the dry magnetic separation production process, this invention provides an online dry separation process and equipment based on CTX magnetic drums. Dry separation is carried out on the conveyor belt of fine crushed ore in the fine ore bin of the concentrator. The dry separation concentrate is still transported to the fine ore bin using the original conveyor belt. The dry separation tailings are collected by the ore collection funnel and then transferred to the dry separation tailings bin via a newly added dry separation tailings conveyor belt, thus realizing full dry separation of fine crushed ore. Summary of the Invention

[0008] This invention provides a dry separation device based on CTX magnetic drum, which solves the defect in the prior art that it is impossible to form a complete dry magnetic separation system using CTX magnetic drum. It enables the dry separation to be carried out on the conveyor belt and then the dry separation concentrate obtained is transported to the fine ore bin on the same conveyor belt.

[0009] This invention provides a dry separation device based on a CTX magnetic drum, comprising:

[0010] A conveyor belt, wherein a feed inlet is provided at the upstream end of the conveyor belt and a concentrate inlet is provided at the downstream end of the conveyor belt;

[0011] The refining mechanism includes at least a magnetic pulley, a refining CTX magnetic drum, and a first conveyor belt. The magnetic pulley is used to rough the ore on the conveyor belt to obtain rough concentrate and rough tailings. The first conveyor belt is wound around the magnetic pulley and the refining CTX magnetic drum. The first conveyor belt is used to transport the rough concentrate to the refining CTX magnetic drum. The refining CTX magnetic drum is used to process the rough concentrate to obtain refined tailings and refined concentrate. The refining CTX magnetic drum and the first conveyor belt are used together to transport the refined concentrate back to the conveyor belt.

[0012] According to the present invention, a dry separation device based on a CTX magnetic drum further includes several stages of scavenging mechanism. The scavenging mechanism includes a drive drum, a second conveyor belt, and a scavenging CTX magnetic drum. The second conveyor belt is wound around the drive drum and the scavenging CTX magnetic drum. The scavenging CTX magnetic drum is arranged downstream of the cleaning mechanism along the conveying direction of the conveyor belt. The scavenging CTX magnetic drum is used to scavenge the cleaning tailings to obtain scavenged concentrate and scavenged tailings. The scavenging CTX magnetic drum and the second conveyor belt are used together to transport the scavenged concentrate to the conveyor belt.

[0013] According to the present invention, a dry separation device based on a CTX magnetic roller is provided, wherein the minimum gap between the upper surface of the conveyor belt and the outer surface of the first conveyor belt is 10-100 mm.

[0014] A dry separation device based on a CTX magnetic drum according to the present invention further includes:

[0015] Multiple ore separating plates are respectively disposed at the bottom of the fine CTX magnetic drum and the scavenging CTX magnetic drum. Each ore separating plate includes a first guide plate and a second guide plate arranged at an angle. The first guide plate is used to guide the fine concentrate to the conveyor belt.

[0016] A dry separation device based on a CTX magnetic drum according to the present invention further includes:

[0017] At least two tailings collection hoppers are provided on both sides of the conveyor belt;

[0018] Multiple unloading components are respectively set for the magnetic pulley and the scavenging CTX magnetic drum, and are used to transport the roughing tailings and scavenging tailings to the tailings collection funnel.

[0019] According to the present invention, a dry sorting device based on a CTX magnetic roller is provided, wherein a non-magnetic flat roller is provided at the bottom of the conveyor belt corresponding to the position of the magnetic pulley.

[0020] According to the present invention, a dry separation device based on a CTX magnetic roller is provided, wherein the magnetic field strength of the magnetic pulley is 0.6 Tesla-1.3 Tesla, the magnetic field strength of the selective CTX magnetic roller is 0.4 Tesla-0.45 Tesla, and the magnetic field strength of the sweeping CTX magnetic roller is 0.4 Tesla-0.48 Tesla.

[0021] According to the present invention, a dry sorting device based on a CTX magnetic roller is provided, wherein the sorting CTX magnetic roller is located above the magnetic pulley, and the first conveyor belt gradually tilts upward along the conveying direction of the conveyor belt.

[0022] According to the present invention, a dry separation device based on a CTX magnetic roller is provided, wherein both the first conveyor belt and the second conveyor belt include an upward section and a downward section, and a magnetic roller is provided at the bottom of the upward section.

[0023] According to the present invention, a dry separation device based on a CTX magnetic drum is provided. When the scavenging mechanism has at least two stages, all the scavenging mechanisms are arranged sequentially along the conveying direction of the conveyor belt, and the downstream scavenging mechanism is used to scaveng the tailings of the scavenging mechanism of the previous stage.

[0024] A dry separation device based on a CTX magnetic drum according to the present invention further includes:

[0025] A sealed cover forms a working space, in which the conveyor belt, the sorting mechanism, and the sweeping mechanism are installed.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0027] The dry separation equipment based on CTX magnetic drum includes a conveyor belt and a cleaning mechanism. The upstream end of the conveyor belt is provided with a feed port and the downstream end of the conveyor belt is provided with a concentrate port. The cleaning mechanism includes at least a magnetic pulley, a cleaning CTX magnetic drum, and a first conveyor belt. The magnetic pulley is used to roughen the ore on the conveyor belt to obtain rough concentrate and rough tailings. The first conveyor belt is wound around the magnetic pulley and the cleaning CTX magnetic drum. The first conveyor belt is used to transport the rough concentrate to the cleaning CTX magnetic drum. The cleaning CTX magnetic drum is used to process the rough concentrate to obtain cleaning tailings and cleaning concentrate. The cleaning CTX magnetic drum and the first conveyor belt are used together to transport the cleaning concentrate back to the conveyor belt.

[0028] The ore enters through the feed inlet and is transported on the conveyor belt. After roughing by magnetic pulleys, rough concentrate and rough tailings are obtained. The rough concentrate is then further refined by the CTX magnetic drum, resulting in refined concentrate. The CTX magnetic drum and the first conveyor belt work together to transport the refined concentrate back to the original conveyor belt. This dry separation equipment based on CTX magnetic drums achieves dry separation on a single conveyor belt through the conveyor belt and the refining mechanism. The refined concentrate obtained after dry separation is still transported back to the original conveyor belt, which not only saves on conveying devices and greatly improves the efficiency of dry separation, but also reduces the cost of dry separation and saves on management costs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the dry separation device based on the CTX magnetic drum provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the working process of the dry separation device based on CTX magnetic drum provided in an embodiment of the present invention;

[0032] Figure 3 This is a process flow diagram of the dry separation equipment based on CTX magnetic drum provided in an embodiment of the present invention.

[0033] Figure label:

[0034] 100. Conveyor belt; 110. Feed inlet; 120. Concentrate inlet;

[0035] 200. Selecting mechanism; 210. Magnetic pulley; 220. Selecting CTX magnetic roller; 230. First conveyor belt;

[0036] 300. Sweeping mechanism; 310. Drive roller; 320. Second conveyor belt; 330. Sweeping CTX magnetic roller;

[0037] 400. Ore powder bin;

[0038] 500. Mineral distribution plate; 510. First guide plate; 520. Second guide plate;

[0039] 600. Unloading components;

[0040] 700. Anti-deviation guide rollers;

[0041] 800. Sweeper;

[0042] 900. Leveling device. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] This invention provides a dry separation device based on a CTX magnetic drum, such as... Figure 1 As shown, the system includes a conveyor belt 100 and a refining mechanism 200. The upstream end of the conveyor belt 100 is provided with a feed inlet 110, and the downstream end of the conveyor belt 100 is provided with a concentrate inlet 120. The refining mechanism 200 includes at least a magnetic pulley 210, a refining CTX magnetic drum 220, and a first conveyor belt 230. The magnetic pulley 210 is used to rough the ore on the conveyor belt 100 to obtain rough concentrate and rough tailings. The first conveyor belt 230 is wound around the magnetic pulley 210 and the refining CTX magnetic drum 220. The first conveyor belt 230 is used to transport the rough concentrate to the refining CTX magnetic drum 220. The refining CTX magnetic drum 220 is used to process the rough concentrate to obtain refined tailings and refined concentrate. The refining CTX magnetic drum 220 and the first conveyor belt 230 are used together to transport the refined concentrate back to the conveyor belt 100.

[0045] The ore enters through the feed inlet 110 and is transported on the conveyor belt 100. After roughing by the magnetic pulley 210, rough concentrate and rough tailings are obtained. The rough concentrate is then refined by the CTX magnetic drum 220 to obtain refined concentrate. The CTX magnetic drum 220 and the first conveyor belt 230 are used together to transport the refined concentrate back to the conveyor belt 100. The conveyor belt 100 is suitable for transporting the refined concentrate obtained from dry separation to the powder silo 400. This dry separation equipment based on the CTX magnetic drum achieves dry separation on a single conveyor belt 100 through the conveyor belt 100 and the refined concentrate obtained after dry separation is still transported back to the original conveyor belt 100. This not only saves on conveying devices and greatly improves the efficiency of dry separation, but also reduces the cost of dry separation and saves on management costs.

[0046] The magnetic pulley 210 is used for roughing the ore on the conveyor belt 100 to obtain roughing concentrate and roughing tailings. Understandably, due to the strong magnetic field of the magnetic pulley 210, the ore transported on the conveyor belt 100 is lifted, forming roughing concentrate, while the waste rock in the ore that is not lifted forms roughing tailings. In this process, the magnetic pulley 210 plays a role in roughing. Simultaneously, the magnetic pulley 210 can transport the roughing concentrate to the first conveyor belt 230, serving as the feed for the finer CTX magnetic roller 220. Furthermore... The magnetic pulley 210 acts as the driving wheel, driving the first conveyor belt 230 and the rotation of the selected CTX magnetic roller 220. In this embodiment, the magnetic pulley 210 is driven by a motor. Specifically, this embodiment also includes a geared motor and a coupling. The magnetic pulley 210 is connected to the geared motor through the coupling to adjust the rotational speed of the magnetic pulley 210. The selected CTX magnetic roller 220 is driven by the magnetic pulley 210, while the magnetic system of the selected CTX magnetic roller 220 is driven separately by the geared motor.

[0047] To prevent the idlers of the conveyor belt 100 from interfering with the magnetic force of the magnetic pulley 210, in one embodiment, a non-magnetic flat idler is provided at the bottom of the conveyor belt 100 corresponding to the position of the magnetic pulley 210; generally, the non-magnetic flat idler can be made of non-magnetic stainless steel, rubber or plastic, etc.; the conveyor belt 100 can be set horizontally or inclined.

[0048] Generally, the minimum gap between the upper surface of the conveyor belt 100 and the outer surface of the first conveyor belt 230 is 10-100 mm. Specifically, the magnetic pulley 210 is set 30 mm above the conveyor belt 100, that is, the minimum gap between the upper surface of the conveyor belt 100 and the outer surface of the first conveyor belt 230 is 30 mm. When the ore passes the bottom of the magnetic pulley 210, it is picked up and runs above the conveyor belt 100 to obtain the roughing concentrate. The waste rock that is not picked up forms the roughing tailings, of which the waste rate of the roughing tailings is 10.9%, the total iron grade is 7.8%, the magnetic iron grade is 0.85%, and the total iron grade of the roughing concentrate is 17.0%, which is 1 percentage point higher than that of the original ore.

[0049] To further process the tailings, this embodiment also includes several stages of scavenging mechanisms 300. In this embodiment, the scavenging mechanism 300 is set to one stage. Of course, the scavenging mechanism 300 can be set to multiple stages in sequence. When there are at least two stages of scavenging mechanisms 300, all scavenging mechanisms 300 are set in sequence along the conveying direction of the conveyor belt 100, and the downstream scavenging mechanism 300 is used to scaveng the tailings of the scavenging mechanism 300 above it again to improve the processing capacity. The scavenged concentrate obtained after each stage of scavenging is concentrated on the conveyor belt 100 for transportation.

[0050] The scavenging mechanism 300 includes a drive drum 310, a second conveyor belt 320, and a scavenging CTX magnetic drum 330. The second conveyor belt 320 is wound around the drive drum 310 and the scavenging CTX magnetic drum 330. The scavenging CTX magnetic drum 330 is used to scavenge the selected tailings to obtain scavenged concentrate and scavenged tailings. The scavenging CTX magnetic drum 330 transports the scavenged concentrate to the conveyor belt 100. The scavenged concentrate and the selected concentrate on the conveyor belt are concentrated to form the final dry-separated concentrate. The total iron grade of the scavenged concentrate is 22.5%, the waste rate of the scavenged tailings is 71.4%, the total iron grade is 9.2%, and the magnetic iron grade is 0.9%. The drive drum 310 acts as the drive wheel, driving the second conveyor belt 320 and the rotation of the scavenging CTX magnetic drum 330. In this embodiment of the invention, the drive drum 310 is connected to a geared motor through a coupling to adjust the speed of the second conveyor belt 320. The magnetic system of the scavenging CTX magnetic drum 330 is driven separately by the geared motor.

[0051] With 300 scanning agencies as the first level:

[0052] The scavenging CTX magnetic drum 330 is positioned downstream of the cleaning mechanism 200 along the conveying direction of the conveyor belt 100, so that the cleaning CTX magnetic drum 220 can transport the cleaned tailings to the second conveyor belt 320, facilitating further processing of the cleaned tailings by the scavenging mechanism 300; the scavenging mechanism 300 returns the scavenged concentrate obtained after scavenging to the conveyor belt 100, and the scavenged concentrate and the cleaned concentrate are combined to form the final dry-concentrated concentrate.

[0053] If the 300 sweeping organizations have at least two levels:

[0054] The multi-stage scavenging mechanisms 300 are arranged sequentially; the scavenging CTX magnetic drum 330 of the first scavenging mechanism 300 is set downstream of the cleaning mechanism 200 along the conveying direction of the conveyor belt 100, and the scavenging CTX magnetic drums 330 of the remaining scavenging mechanisms 300 are set downstream of the previous scavenging CTX magnetic drum 330 along the conveying direction of the conveyor belt 100, so as to scaveng the tailings obtained by the previous scavenging CTX magnetic drum 330; while the scavenging concentrate obtained by the scavenging CTX magnetic drums 330 at each stage flows to the conveyor belt 100 and is concentrated with the cleaned concentrate to form the final dry-separated concentrate.

[0055] The conveyor belt 100 is suitable for transporting the final dry concentrate obtained from dry separation to the fine ore bin 400. The dry separation equipment based on CTX magnetic drum achieves dry separation on a single conveyor belt 100 through the conveyor belt 100, the cleaning mechanism 200 and the scavenging mechanism 300. The final dry concentrate obtained after dry separation is still transported back to the original conveyor belt 100, which not only saves on conveying devices and greatly improves the efficiency of dry separation, but also reduces the cost of dry separation and saves on management costs.

[0056] When the CTX magnetic drum 220 is used for fine selection, the magnetic systems of its outer and inner cylinders rotate in opposite directions, and the magnetic lines of force strongly repel, squeeze and gather, forming an alternating rotating magnetic field. The magnetic ore of the roughing concentrate passes through the high field strength region and the low field strength region rapidly and repeatedly in a short period of time. The magnetic ore of the roughing concentrate will undergo rapid magnetic flipping and magnetic agitation. Under the action of a large magnetic force, the magnetic ore mixed between the non-magnetic ores will move to the inner layer and be discharged onto the conveyor belt 100 as fine concentrate. The non-magnetic ore mixed between the magnetic ores will be magnetically agitated and moved to the outer layer under the action of centrifugal force and gravity, and will be thrown onto the second conveyor belt 320 of the scavenging mechanism 300 as the feed for the scavenging operation of the scavenging mechanism 300.

[0057] When the scavenging CTX magnetic drum 330 performs scavenging, it moves the waste rock and poor intergrowth in the selected tailings to the outer layer through multiple rapid magnetic flips and magnetic agitation to form scavenging tailings. The scavenging tailings are combined with the roughing tailings obtained by the magnetic pulley 210 to form the final dry separation tailings. The rich intergrowth in the inner layer is unloaded as scavenging concentrate onto the conveyor belt 100 and combined with the selected concentrate obtained by the selecting CTX magnetic drum 220 to form the final dry separation concentrate.

[0058] This invention, through roughing, cleaning, and scavenging, removes a large amount of waste rock in advance, reducing the amount of ore fed into the mill, thus saving energy and reducing consumption; it significantly increases the grade of iron ore fed into the mill, optimizes the beneficiation process, and reduces beneficiation costs; it reduces the amount of fine-grained tailings entering the tailings pond, extends the service life of the tailings pond, and ensures that coarse-grained tailings have high utilization value, thereby achieving cost reduction and efficiency improvement for the concentrator. Dry beneficiation yields a final dry concentrate with a total iron grade of 24.1%, and a final dry tailings with a yield of 53.3% and a magnetic iron grade of 0.87%. The final dry concentrate grade is 8.1 percentage points higher than the original ore, and more than half of the waste rock is removed, allowing the utilization of lean iron ore.

[0059] In one embodiment, this embodiment also includes a plurality of separating plates 500, the separating plates 500 disposed at the bottom of the fine CTX magnetic drum 220, for separating the fine concentrate and fine tailings after fine selection; and the separating plates 500 at the bottom of the scavenging CTX magnetic drum 330, for separating the scavenged concentrate and scavenged tailings after scavenging.

[0060] To improve dry separation efficiency, the rotational speed of the outer cylinders of the fine CTX magnetic drum 220 and the scavenging CTX magnetic drum 330, i.e., the conveying speed of the first conveyor belt 230 and the second conveyor belt 320, can be frequency-controlled according to the properties of the ore. It is understood that appropriately increasing the conveying speed of the first conveyor belt 230 and the second conveyor belt 320 will improve the dry separation efficiency and save production costs. In addition, the rotational speed and magnetic field strength of the magnetic system of the fine CTX magnetic drum 220 and the scavenging CTX magnetic drum 330 can be adjusted according to the properties of the ore to improve the dry separation effect. When the rotational speed or magnetic field strength of the fine CTX magnetic drum 220 or the scavenging CTX magnetic drum 330 is changed, the boundary between the fine concentrate and the fine tailings or the scavenging concentrate and the scavenging tailings will change. In one embodiment, the separating plate 500 is movable to facilitate adjustment of the position of the separating plate 500 to adapt to different rotational speeds or magnetic field strengths.

[0061] Specifically, the ore sorting plate 500 includes a first guide plate 510 and a second guide plate 520 arranged at an angle. The first guide plate 510 guides the flow in the opposite direction of the conveyor belt 100 so as to guide the selected concentrate or scavenged concentrate to the conveyor belt 100. The second guide plate 520 located at the bottom of the selected CTX magnetic drum 220 guides the flow in the direction of the second conveyor belt 320 so as to guide the selected tailings to the scavenging mechanism 300.

[0062] In one embodiment, the present invention further includes a plurality of unloading components 600, which are respectively configured to correspond to the magnetic pulley 210 and the scavenging CTX magnetic drum 330, for conveying the roughing tailings and scavenging tailings to both sides of the conveyor belt 100; at least two tailings collection funnels are provided on both sides of the conveyor belt 100, and the unloading components 600 convey the roughing tailings and scavenging tailings to the tailings collection funnels on both sides of the conveyor belt 100, so as to concentrate the roughing tailings and scavenging tailings to form the final dry-concentrated tailings.

[0063] In one embodiment, the unloading component 600 can be a plow-type unloader. Generally, the plow-type unloader is configured to correspond to the magnetic pulley 210 to transport the roughing tailings to the tailings collection hoppers on both sides of the conveyor belt 100. The unloading component 600 can also be a three-way distribution hopper, which has one inlet and two outlets, with the two outlets corresponding to the tailings collection hoppers on both sides of the conveyor belt 100. Generally, the three-way distribution hopper is configured to correspond to the CTX magnetic roller 330. The scavenged tailings enter the three-way distribution hopper through the inlet and then flow out through the outlets into the tailings collection hopper. When a multi-stage scavenging mechanism 300 is provided, the three-way distribution hopper is configured to correspond to the CTX magnetic roller 330 of the last stage scavenging mechanism 300. Of course, the specific structural form of the unloading component 600 is not limited to the example here, and the tailings collection hopper can also be provided only on one side of the conveyor belt 100.

[0064] Embodiments of the present invention also include a dry tailings transport belt, which is suitable for transferring the final dry tailings from the tailings collection funnel to the dry tailings bin.

[0065] In one embodiment, the present invention further includes a plurality of anti-deviation guide rollers 700, which are respectively disposed on both sides of the first conveyor belt 230 and the second conveyor belt 320 to prevent the first conveyor belt 230 and the second conveyor belt 320 from deviating.

[0066] In one embodiment, the magnetic pulley 210 has a magnetic field strength of 0.8 Tesla. Utilizing the high magnetic field strength of the magnetic pulley 210, the roughing concentrate is attracted to the first conveyor belt 230. The finer CTX magnetic drum 220 has a magnetic field strength of 0.4 Tesla and a magnetic rotation speed of 60 rpm. It removes waste rock or poor intergrowth mixed in with the roughing concentrate, thereby improving the grade and waste removal rate of the finer concentrate. The scavenger CTX magnetic drum 330 has a magnetic field strength of 0.4 Tesla and a magnetic rotation speed of 65 rpm. It recovers the richer intergrowth from the roughing tailings, further reducing the magnetic iron grade of the final dry-separation tailings and improving the magnetic iron recovery rate.

[0067] In one embodiment, the fine CTX magnetic roller 220 is located above the magnetic pulley 210 and along the conveying direction of the conveyor belt 100, the first conveyor belt 230 gradually tilts upward, which is beneficial to raising the position of the fine tailings and facilitating the flow of the fine tailings obtained after fine selection to the scavenging mechanism 300; the first conveyor belt 230 includes an upper section and a lower section. In order to improve the conveying efficiency of the first conveyor belt 230, a magnetic idler roller can be set at the bottom of the upper section of the first conveyor belt 230. The magnetic idler roller can adsorb the rough concentrate on the first conveyor belt 230, ensuring that the rough concentrate does not slip under the condition that the first conveyor belt 230 has a high speed and a large inclination angle.

[0068] The second conveyor belt 320 is inclined upward to allow for the discharge height difference of the scavenged tailings. The second conveyor belt 320 includes an upper section and a lower section. The bottom of the upper section of the second conveyor belt 320 is equipped with a magnetic roller. Similarly, the magnetic roller can adsorb the selected tailings on the second conveyor belt 320, ensuring that the selected tailings do not slip off under the conditions of high speed and large inclination angle of the second conveyor belt 320.

[0069] Embodiments of the present invention may also include a sealing cover, forming a working space inside the sealing cover. The conveyor belt 100, the sorting mechanism 200 and the sweeping mechanism 300 are all installed in the working space. The sealing cover can play a protective role, avoiding dust, preventing ore from splashing on the conveyor belt, avoiding injury to people and protecting the environment.

[0070] This invention may also include multiple cleaners 800, which are respectively set for the selection CTX magnetic roller 220 and the sweeping CTX magnetic roller 330. The cleaners 800 are used to keep the outer cylinders of the selection CTX magnetic roller 220 and the sweeping CTX magnetic roller 330 clean, thereby improving the production efficiency.

[0071] In one embodiment, a leveler 900 is provided in front of the magnetic pulley 210, which can effectively level the material on the conveyor belt 100 and keep the material well within the sorting area, greatly improving the dry sorting effect. Specifically, the leveler 900 is equipped with a magnetic block inside. Under the magnetic force of the magnetic block, the ore on the conveyor belt 100 is adsorbed onto the surface of the leveler 900, which can prevent the leveler 900 from being worn by the ore moving on the conveyor belt 100.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry separation plant based on a CTX magnetic drum, characterized in that, The application relates to a beneficiation device, which comprises: a conveying belt, an upstream end of the conveying belt being provided with a feeding port, and a downstream end of the conveying belt being provided with a concentrate port; a cleaning mechanism, which at least comprises a magnetic pulley, a cleaning CTX magnetic roller and a first conveying belt, the magnetic pulley being used for rough cleaning of the ore on the conveying belt to obtain rough cleaning concentrate and rough cleaning tailings, the first conveying belt being arranged around the magnetic pulley and the cleaning CTX magnetic roller, the first conveying belt being used for conveying the rough cleaning concentrate to the cleaning CTX magnetic roller, the cleaning CTX magnetic roller being used for processing the rough cleaning concentrate to obtain cleaning tailings and cleaning concentrate, and the cleaning CTX magnetic roller and the first conveying belt being used for conveying the cleaning concentrate back to the conveying belt; a plurality of stages of scavenging mechanisms, the scavenging mechanism comprising a driving roller, a second conveying belt and a scavenging CTX magnetic roller, the second conveying belt being arranged around the driving roller and the scavenging CTX magnetic roller, the scavenging CTX magnetic roller being arranged downstream of the cleaning mechanism along the conveying direction of the conveying belt, the scavenging CTX magnetic roller being used for scavenging the cleaning tailings to obtain scavenging concentrate and scavenging tailings, and the scavenging CTX magnetic roller and the second conveying belt being used for conveying the scavenging concentrate to the conveying belt.

2. A CTX magnetic drum based dry separation apparatus according to claim 1, characterized in that, The minimum gap between the upper surface of the conveying belt and the outer surface of the first conveying belt is 10-100 mm.

3. The CTX magnetic drum based dry separation apparatus as claimed in claim 1, wherein, The application further comprises: a plurality of ore distribution plates, which are respectively arranged at the bottom of the cleaning CTX magnetic roller and the scavenging CTX magnetic roller, the ore distribution plate comprising a first guide plate and a second guide plate arranged at an angle, the first guide plate being used for guiding the cleaning concentrate to the conveying belt.

4. The CTX magnetic drum based dry separation apparatus as claimed in claim 1, wherein, The application further comprises: at least two tailings collection hoppers arranged on both sides of the conveying belt; a plurality of unloading components, which are respectively arranged corresponding to the magnetic pulley and the scavenging CTX magnetic roller, and are used for conveying the rough cleaning tailings and the scavenging tailings to the tailings collection hoppers.

5. The CTX-magnetic drum based dry separation apparatus according to any one of claims 1 to 4, characterized in that, The bottom of the conveying belt is provided with a non-magnetic flat roller corresponding to the position of the magnetic pulley.

6. The CTX magnetic drum based dry separation apparatus as claimed in claim 1, wherein, The magnetic field intensity of the magnetic pulley is 0.6-1.3 T, the magnetic field intensity of the cleaning CTX magnetic roller is 0.4-0.45 T, and the magnetic field intensity of the scavenging CTX magnetic roller is 0.4-0.48 T.

7. The CTX-magnetic drum based dry separation apparatus according to any one of claims 1 to 4, characterized in that, The cleaning CTX magnetic roller is arranged above the magnetic pulley, and the first conveying belt gradually inclines upward along the conveying direction of the conveying belt.

8. The CTX magnetic drum based dry separation apparatus as claimed in claim 1, wherein, The first conveying belt and the second conveying belt each comprise an upward segment and a downward segment, and the bottom of the upward segment is provided with a magnetic roller.

9. The CTX magnetic drum based dry separation apparatus as claimed in claim 1, wherein, When the scavenging mechanism is at least two stages, all the scavenging mechanisms are arranged in sequence along the conveying direction of the conveying belt, and the downstream scavenging mechanism is used for re-scavenging the scavenging tailings of the upstream scavenging mechanism.

10. The CTX magnetic drum based dry separation apparatus as claimed in claim 1, wherein, The application further comprises: a sealing cover, which forms a working space, and the conveying belt, the cleaning mechanism and the scavenging mechanism are installed in the working space.

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