Vanadium titano-magnetite mining waste rock recovery system and method

Abstract

The invention relates to the technical field of mineral exploitation waste rock recovery, and discloses a vanadium titano-magnetite exploitation waste rock recovery system and method.According to the vanadium titano-magnetite exploitation waste rock recovery system, waste rocks are classified through a waste rock recognition and classification device, and first-class waste rock materials and second-class waste rock materials are obtained; first-class waste rock materials and second-class waste rock materials are subjected to rough throwing and magnetic separation through the rough throwing and magnetic separation device, rough throwing concentrate is fed into the intermediate crushing and screening device, intermediate crushing and screening are carried out on the rough throwing concentrate through the intermediate crushing and screening device, fine crushing and screening are carried out on products on an intermediate crushing screen through the fine crushing and screening device, and fine crushing and screening are carried out through the fine crushing and screening device. And performing magnetic separation on the fine crushing screen underflow and the intermediate crushing screen underflow through a fine throwing magnetic separation device to obtain fine throwing concentrate and fine throwing tailings. According to the scheme, the titanium and iron resource recovery rate is greatly increased, the building aggregate recovery rate is increased, and the problems of resource waste and environmental pressure caused by stockpiling of a large amount of waste rocks are solved.

Description

Technical Field

[0001] This invention relates to the field of waste rock recycling technology in mineral mining, and in particular to a system and method for recycling waste rock from vanadium-titanium magnetite mining. Background Technology

[0002] In the mining of vanadium-titanium magnetite, a massive amount of stripping waste rock is generated due to limitations in ore body burial conditions and technological and economic bottlenecks in mining processes. This waste rock is typically stockpiled in specialized spoil heaps, but it is not entirely useless waste. Based on its composition, this stripping waste rock can be broadly divided into two categories: one is rock with an iron content of less than 10%, which is difficult to economically beneficiate using current technology; the other is extremely lean ore with an iron content between 10% and 15%. It is noteworthy that the resource reserves of this type of extremely lean ore often exceed one-quarter of the total resource reserves of the mining area. This means that the portion considered waste rock due to limitations in beneficiation technology and economic indicators actually contains considerable valuable components, resulting in significant resource waste. Furthermore, large-scale waste rock stockpiling generates a series of environmental and safety challenges. First, spoil heaps inevitably occupy a large amount of land resources, altering the original topography and vegetation cover. More importantly, these loose deposits pose a potential risk of geological disasters, such as landslides and debris flows, under conditions of heavy rainfall, threatening downstream personnel and facilities. They may also impact the surrounding soil and water environment due to leaching. Therefore, the recycling and utilization of vanadium-titanium magnetite waste rock is of great significance.

[0003] In traditional vanadium-titanium magnetite waste rock comprehensive recycling technologies, the comprehensive recycling and utilization of vanadium-titanium magnetite waste rock can be broadly divided into two categories: one is to use mineral processing technology to recover useful minerals from the waste rock. However, since the waste rock is a low-grade resource, the concentrate recovery rate is low when sorted at conventional crushing-grinding particle size. The other is to utilize the waste rock for building materials, such as crushing it into aggregates of different particle sizes for use in the construction industry or using it as raw material to fire building bricks. However, although the approach of simply processing waste rock into building materials can dispose of some solid waste, it is essentially a downgrade of resource utilization. It fails to fully extract strategic metals such as iron and titanium. Moreover, due to the low price of building materials and high transportation costs, its market radius and processing scale are limited, and it cannot fundamentally solve the problem of resource waste and environmental pressure caused by the large-scale stockpiling of waste rock. Summary of the Invention

[0004] In view of this, the present invention proposes a waste rock recycling system and method for vanadium-titanium magnetite mining, which solves the problem of low concentrate recovery rate in traditional comprehensive recycling technology for vanadium-titanium magnetite waste rock.

[0005] On one hand, embodiments of the present invention provide a vanadium-titanium magnetite mining waste rock recycling system, which includes: a waste rock identification and classification device, a coarse magnetic separation device, a medium crushing and screening device, a fine crushing and screening device, and a fine magnetic separation device connected in sequence. The waste rock identification and classification device is used to classify waste rock based on the TiO2 content and TFe content in the waste rock to obtain Class I waste rock material and Class II waste rock material. The coarse magnetic separation device is used to perform coarse magnetic separation on Class I and Class II waste rock materials based on different magnetic field strengths to obtain coarse concentrate and coarse tailings. The medium crushing and screening device is used to perform medium crushing and screening of the coarse ore concentrate to obtain medium crushing oversize and medium crushing undersize. The fine crushing and screening device is used to crush and screen the material on the medium crushing screen to obtain the fine crushed material under the screen. The fine-displacement magnetic separator is used to perform magnetic separation on the fine crushed undersize material and the medium crushed undersize material to obtain fine-displacement concentrate and fine-displacement tailings.

[0006] In some embodiments, the vanadium-titanium magnetite mining waste rock recovery system further includes: the coarse tailings conveyor belt, the coarse tailings discharge control device, and the fine tailings weight monitoring device; The coarse tailings conveyor belt is connected to the coarse tailings discharge control device and the coarse magnetic separation device, respectively, for receiving the coarse tailings discharged by the coarse magnetic separation device and feeding the coarse tailings into the coarse tailings discharge control device. The fine tailings weight monitoring device is connected to the coarse tailings discharge control device and the fine tailings magnetic separator, respectively. The fine tailings weight monitoring device is used to monitor the weight of the fine tailings and feed the fine tailings into the main tailings conveyor belt. The coarse tailings discharge control device is used to obtain the weight of the fine tailings from the fine tailings weight monitoring device and control the amount of coarse tailings fed into the main tailings conveyor belt according to the obtained weight of the fine tailings.

[0007] In some embodiments, the TiO2 content in the first type of waste rock material is >4% and / or the TFe content is >13%, and the TiO2 content in the second type of waste rock material is ≤4% and the TFe content is ≤13%.

[0008] In some embodiments, the coarse magnetic separation device includes: a type I waste rock coarse magnetic separation device and a type II waste rock coarse magnetic separation device; The first type of waste rock coarse magnetic separation device is used to perform coarse magnetic separation on the first type of waste rock material to obtain a first type of coarse magnetic concentrate and a first type of coarse magnetic tailings; the second type of waste rock coarse magnetic separation device is used to perform coarse magnetic separation on the second type of waste rock material to obtain a second type of coarse magnetic concentrate and a second type of coarse magnetic tailings. The magnetic field strength for coarse magnetic separation of the first type of waste rock material is higher than that for coarse magnetic separation of the second type of waste rock material.

[0009] In some embodiments, the primary waste rock coarse-throwing magnetic separator includes: a primary waste rock bin, at least one primary waste rock transport and sorting belt, and a primary waste rock coarse-throwing magnetic pulley; wherein, the inlet of the primary waste rock bin is connected to the waste rock identification and classification device, the outlet of the primary waste rock bin is connected to one end of the primary waste rock transport and sorting belt, and the primary waste rock coarse-throwing magnetic pulley is installed at the other end of the primary waste rock transport and sorting belt; The Class II waste rock coarse-throwing magnetic separator includes: a Class II waste rock bin, at least one Class II waste rock transport and sorting belt, and a Class II waste rock coarse-throwing magnetic pulley; wherein, the inlet of the Class II waste rock bin is connected to the waste rock identification and classification device, the outlet of the Class II waste rock bin is connected to one end of the Class II waste rock transport and sorting belt, and the Class II waste rock coarse-throwing magnetic pulley is installed at the other end of the Class II waste rock transport and sorting belt.

[0010] In some embodiments, the medium crushing and screening device includes: a medium crushing pre-buffer bin, a medium crushing buffer bin, a medium-particle crusher, a screening buffer bin, and a screening machine connected in sequence; the medium crushing pre-buffer bin is connected to the coarse magnetic separation device; and the screening machine is connected to the fine crushing and screening device and the fine magnetic separation device, respectively. The screening machine is used to feed the material on the screen into the fine crushing and screening device, and to feed the material on the screen into the fine throwing magnetic separation device. The volume of the pre-crushing buffer chamber is larger than the volume of the intermediate crushing buffer chamber.

[0011] In some embodiments, the fine crushing and screening device includes: a fine particle buffer bin and a fine particle crusher connected in sequence, wherein the fine particle buffer bin is connected to the screening machine of the medium crushing and screening device, the fine particle crusher is connected to the screening buffer bin of the medium crushing and screening device, and the discharge port diameter of the fine particle crusher is smaller than the discharge port diameter of the medium crusher.

[0012] In some embodiments, the fine-dissipation magnetic separator includes: a fine-dissipation buffer chamber, a fine-dissipation roughing magnetic separator, and a fine-dissipation scavenging magnetic separator connected in sequence. The fine-dissipation buffer chamber is connected to the screening machine of the intermediate crushing and screening device. The fine-dissipation roughing magnetic separator is used to perform magnetic separation on the fine-dissipation material to obtain fine-dissipation roughing concentrate and fine-dissipation roughing tailings. The fine-dissipation roughing tailings are fed into the fine-dissipation scavenging magnetic separator, which is used to perform magnetic separation on the fine-dissipation roughing tailings to obtain fine-dissipation scavenging concentrate and fine-dissipation scavenging tailings. The fine-dissipation scavenging tailings are fed into a fine-dissipation tailings weight monitoring device.

[0013] In some embodiments, the coarse tailings discharge control device includes: a coarse tailings crusher, a coarse tailings transfer bin, and a vibrating feeder connected in sequence. The feed inlet of the coarse tailings crusher is connected to the coarse tailings conveyor belt, the feed inlet of the coarse tailings crusher is connected to the feed inlet of the coarse tailings transfer bin, the discharge outlet of the coarse tailings transfer bin is connected to the vibrating feeder, and the vibrating feeder is communicatively connected to the fine tailings weight monitoring device. The vibrating feeder is used to obtain the weight of the fine tailings from the fine tailings weight monitoring device and control the amount of coarse tailings fed into the total tailings conveyor belt according to the obtained weight of the fine tailings.

[0014] On the other hand, embodiments of the present invention also provide a method for recycling waste rock from vanadium-titanium magnetite mining, applied to the vanadium-titanium magnetite mining waste rock recycling system as described in any of the preceding claims, the method comprising: The waste rock is classified into Class I and Class II waste rock materials based on the TiO2 and TFe content in the waste rock using a waste rock identification and classification device. Using a coarse magnetic separation device, Class I and Class II waste rock materials are coarsely magnetically separated based on different magnetic field strengths to obtain coarse concentrate and coarse tailings. The coarse ore concentrate is subjected to medium crushing and screening by a medium crushing and screening device to obtain medium crushing oversize and medium crushing undersize. The material on the medium crushing screen is crushed and screened by a fine crushing and screening device to obtain the fine crushed material under the screen. The fine crushed undersize material and the medium crushed undersize material are magnetically separated by a fine-dispersion magnetic separator to obtain fine-dispersion concentrate and fine-dispersion tailings.

[0015] The present invention has at least the following beneficial effects: This invention provides a waste rock recycling system and method for vanadium-titanium magnetite mining. The waste rock recycling system for vanadium-titanium magnetite mining includes: a waste rock identification and classification device, a coarse magnetic separation device, a medium crushing and screening device, a fine crushing and screening device, and a fine magnetic separation device connected in sequence. The waste rock identification and classification device is used to classify waste rock based on the TiO2 and TFe content, resulting in Class I and Class II waste rock materials. The classified materials are then fed into a coarse magnetic separation device. The coarse magnetic separation device is used to perform coarse magnetic separation on Class I and Class II waste rock materials based on different magnetic field intensities, resulting in coarse concentrate, which is then fed into a medium crushing and screening device. The medium crushing and screening device is used to perform medium crushing and screening on the coarse concentrate, resulting in medium crushing oversize and medium crushing undersize. The medium crushing oversize is then fed into a fine crushing and screening device, while the medium crushing undersize is fed into a fine magnetic separation device. The fine crushing and screening device is used to perform fine crushing and screening on the medium crushing oversize, resulting in fine crushing undersize, which is then fed into a fine magnetic separation device. The fine magnetic separation device is used to perform magnetic separation on the fine crushing undersize and the medium crushing undersize, resulting in fine concentrate and fine tailings.

[0016] This invention utilizes mineral processing technology to recover valuable elements such as iron and titanium from identified high-value Class I waste rock; and directs the use of low-value Class II waste rock for the preparation of building aggregates. Compared to full resource utilization, the cost per ton of ore is reduced by more than 50%, and compared to full building material utilization, the resource recovery rate is increased to 40%, and the economic value is increased by more than 60%. This strategy comprehensively considers resource recovery rate and processing costs, ensuring the economic feasibility of the overall solution and possessing the potential for industrial-scale promotion.

[0017] This invention introduces a waste rock identification and classification device that can identify and automatically sort the mined waste rock in real time based on the content of valuable components in the waste rock, and store the sorted Class I and Class II waste rock separately, creating favorable conditions for subsequent differentiated resource utilization.

[0018] This invention utilizes the above-mentioned technical solution of waste rock classification and identification, coarse magnetic separation, medium crushing and screening, fine crushing and screening device, and fine magnetic separation to recycle and utilize waste rock from vanadium-titanium magnetite mining. This greatly improves the recovery rate of titanium and iron resources, increases the recovery rate of building aggregates, and solves the problems of resource waste and environmental pressure caused by the stockpiling of large amounts of waste rock. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a vanadium-titanium magnetite mining waste rock recycling system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a vanadium-titanium magnetite mining waste rock recycling system provided in an embodiment of the present invention; Figure 3 A graph showing the relationship between the metering weight of a fine tailings conveyor belt and the vibration frequency of a vibrating feeder is provided in an embodiment of the present invention. Figure 4 A flowchart illustrating a method for recycling waste rock from vanadium-titanium magnetite mining, provided as an embodiment of the present invention.

[0021] [Explanation of Labels in the Attached Image] 10: Waste rock identification and classification device; 20: Coarse crushing magnetic separation device; 30: Medium crushing and screening device; 40: Fine crushing and screening device; 50: Fine crushing magnetic separation device; 60: Fine crushing tailings weight monitoring device; 70: Coarse crushing tailings discharge control device; 1: Waste rock identification system; 2: Fine-displacement and coarse-displacement magnetic separator; 3: Fine-displacement and sweeping magnetic separator; 4: Medium-grain crusher; 5: Fine crusher; 6: Screening machine; 7: Vibrating feeder; 8: Measuring scale; 9: Coarse-displacement tailings crusher. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0024] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., used in the specification, claims, and accompanying drawings are used to distinguish different objects, not to describe a particular order. "A plurality of" means two or more, unless otherwise explicitly specified.

[0025] In the description and claims of this invention and the foregoing drawings, when an element is referred to as "fixed to," "mounted to," "disposed on," or "connected to" another element, it can be located directly or indirectly on that other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element.

[0026] It should be noted that, in the embodiments of the present invention, the "connection" between one device and another device can be understood as a corresponding relationship between the two devices in terms of location. For example, if the material discharged / transported by one device can be received by another device, then the two devices can be considered to be "connected". The present invention will now be described in detail with reference to the embodiments and accompanying drawings.

[0027] Among the relevant vanadium-titanium magnetite waste rock recycling technologies, the comprehensive recycling and utilization of vanadium-titanium magnetite waste rock can be broadly divided into two categories: one is to use mineral processing techniques to recover useful minerals from the waste rock; the other is to utilize the waste rock for building materials, such as crushing it into aggregates of different particle sizes for use in the construction industry or using it as raw material to fire building bricks, etc. These technologies face the following problems: 1) Waste rock, as a low-grade resource, suffers from high energy consumption and production costs when sorted at conventional crushing-grinding particle size, resulting in low economic efficiency and making it difficult to achieve industrial production. 2) The valuable mineral content of stripped waste rock from mining is highly dependent on prior exploration data and on-site manual identification, which introduces significant uncertainty, resulting in large fluctuations in the valuable components of different batches of waste rock. These fluctuations in material properties directly impact the sorting effect. Using a fixed processing technology makes it difficult to adapt to the differences in properties between different batches of waste rock, leading to unstable recovery rates or a decline in concentrate quality. 3) While the simple processing of waste rock into building materials can dispose of some solid waste, it is essentially a downgrade of resources and fails to fully extract strategic metals such as iron and titanium. Moreover, due to the low price of building materials and the high transportation costs, its market radius and processing scale are limited, and it cannot fundamentally solve the problem of resource waste and environmental pressure caused by the stockpiling of large amounts of waste rock.

[0028] To address at least one of the above technical problems, the present invention provides a vanadium-titanium magnetite mining waste rock recycling system and method, which will be described below with reference to embodiments and accompanying drawings.

[0029] The first aspect of this invention provides a waste rock recovery system for vanadium-titanium magnetite mining, such as... Figure 1As shown, the vanadium-titanium magnetite mining waste rock recycling system includes: a waste rock identification and classification device 10, a coarse magnetic separation device 20, a medium crushing and screening device 30, a fine crushing and screening device 40, and a fine magnetic separation device 50 connected in sequence. The waste rock identification and classification device 10 classifies the waste rock based on its TiO2 and TFe content, resulting in Class I and Class II waste rock materials, and feeds the classified materials into the coarse magnetic separation device 20. The coarse magnetic separation device 20 performs coarse magnetic separation on Class I and Class II waste rock materials based on different magnetic field intensities, obtaining coarse concentrate, which is then fed into the medium crushing and screening device 30. The medium crushing and screening device 30 is used to further separate the coarse waste rock from the fine magnetic concentrate. The concentrate is subjected to medium crushing and screening to obtain medium crushing oversize and medium crushing undersize. The medium crushing oversize is fed into a fine crushing and screening device 40, and the medium crushing undersize is fed into a fine crushing magnetic separation device 50. The fine crushing and screening device 40 is used to fine crush and screen the medium crushing oversize to obtain fine crushing undersize, which is then fed into the fine crushing magnetic separation device 50. The fine crushing magnetic separation device 50 is used to perform magnetic separation on the fine crushing undersize and the medium crushing undersize to obtain fine crushing concentrate and fine crushing tailings.

[0030] Specifically, the waste rock identification and classification device 10 can use X-ray fluorescence identification analysis, image recognition analysis, or manual sampling analysis to determine the TiO2 and TFe content of the transported waste rock. If the TiO2 content is >4% and / or the TFe content is >13%, it is classified as Class I waste rock; otherwise, it is classified as Class II waste rock. Class I and Class II waste rock can be fed into two separate storage bins and then discharged to the coarse magnetic separation device 20. Based on different magnetic field strengths, Class I and Class II waste rock materials are separated. Specifically, the magnetic field strength for coarse magnetic separation of Class I waste rock materials is higher than that for coarse magnetic separation of Class II waste rock materials. In this embodiment of the invention, by introducing the waste rock identification and classification device 10, the mined waste rock can be identified and automatically sorted in real time according to the content of valuable components, and the sorted Class I and Class II waste rock can be stored separately, creating favorable conditions for subsequent differentiated resource utilization.

[0031] In this embodiment of the invention, fine waste concentrate can be fed into an external ore storage silo and transported by conveyor belt to a concentrator for further processing and utilization, thereby improving concentrate utilization and recovery rates. Fine and coarse waste tailings are crushed and used as building aggregates such as sand and gravel aggregates and concrete aggregates. In this embodiment of the invention, high-value Class I waste rock is treated using mineral processing to recover valuable elements such as iron and titanium; low-value Class II waste rock is used specifically for preparing building aggregates. Compared to full resource utilization, the cost per ton of ore is reduced by more than 50%. Compared to full building material utilization, the resource recovery rate is increased to 40%, and the economic value is increased by more than 60%. This strategy comprehensively considers resource recovery rate and processing costs, ensuring the economic feasibility of the overall solution and possessing potential for industrial-scale promotion.

[0032] In this embodiment of the invention, the above-mentioned technical solution of waste rock classification and identification - coarse magnetic separation - medium crushing and screening - fine crushing and screening device - fine magnetic separation is used to recycle and utilize waste rock from vanadium-titanium magnetite mining. This greatly improves the recovery rate of titanium and iron resources, increases the recovery rate of building aggregates, and solves the problems of resource waste and environmental pressure caused by the stockpiling of large amounts of waste rock.

[0033] In some embodiments, such as Figure 1 As shown, the vanadium-titanium magnetite mining waste rock recovery system also includes: a fine tailings weight monitoring device 60, a coarse tailings discharge control device 70, and a coarse tailings conveyor belt. The coarse tailings conveyor belt is connected to both the coarse tailings discharge control device 70 and the coarse magnetic separator 20, receiving the coarse tailings discharged from the coarse magnetic separator 20 and feeding it into the coarse tailings discharge control device 70. The fine tailings weight monitoring device 60 is connected to both the coarse tailings discharge control device 70 and the fine magnetic separator 50, monitoring the weight of the fine tailings and feeding them into the main tailings conveyor belt. The coarse tailings discharge control device 70 obtains the weight of the fine tailings from the fine tailings monitoring device 60 and controls the amount of coarse tailings fed into the main tailings conveyor belt based on the obtained weight.

[0034] This invention establishes a signal linkage control mechanism for fine tailings metering and coarse tailings discharge through the above-described scheme. This linkage mechanism can automatically adjust the discharge rhythm of coarse tailings based on real-time fluctuations in the amount of fine tailings, effectively avoiding the risk of belt conveyor overload caused by sudden changes in material quantity and ensuring the stable operation of the total tailings transportation system. Simultaneously, this regulation also helps stabilize the overall particle size distribution of the mixed tailings, ensuring the production of stable-quality sand and gravel aggregate products.

[0035] In some embodiments, the coarse magnetic separation device 30 may include: a primary waste rock coarse magnetic separation device and a secondary waste rock coarse magnetic separation device. The primary waste rock coarse magnetic separation device is used to perform coarse magnetic separation on primary waste rock materials to obtain primary coarse concentrate and primary coarse tailings; the secondary waste rock coarse magnetic separation device is used to perform coarse magnetic separation on secondary waste rock materials to obtain secondary coarse concentrate and secondary coarse tailings; wherein the magnetic field strength for coarse magnetic separation of primary waste rock materials is higher than the magnetic field strength for coarse magnetic separation of secondary waste rock materials.

[0036] In some specific embodiments of the present invention, the magnetic field strength for coarse magnetic separation of Class I waste rock materials can be 5000~5500 Gs, and the magnetic field strength for coarse magnetic separation of Class II waste rock materials can be 4500~5000 Gs. By setting different magnetic field strengths to perform coarse magnetic separation on Class I and Class II waste rock materials respectively, the recovery rate and utilization rate of iron and titanium resources in waste rock materials can be improved.

[0037] In some specific embodiments of the present invention, a primary waste rock coarse-throwing magnetic separator includes: a primary waste rock bin, at least one primary waste rock transport and sorting belt, and a primary waste rock coarse-throwing magnetic pulley; wherein, the inlet of the primary waste rock bin is connected to a waste rock identification and classification device, the outlet of the primary waste rock bin is connected to one end of the primary waste rock transport and sorting belt, and the primary waste rock coarse-throwing magnetic pulley is installed at the other end of the primary waste rock transport and sorting belt. A secondary waste rock coarse-throwing magnetic separator includes: a secondary waste rock bin, at least one secondary waste rock transport and sorting belt, and a secondary waste rock coarse-throwing magnetic pulley; wherein, the inlet of the secondary waste rock bin is connected to a waste rock identification and classification device, the outlet of the secondary waste rock bin is connected to one end of the secondary waste rock transport and sorting belt, and the secondary waste rock coarse-throwing magnetic pulley is installed at the other end of the secondary waste rock transport and sorting belt.

[0038] Specifically, a Class I waste rock transport and sorting belt may include a discharge belt and a sorting belt. The discharge belt receives Class I waste rock discharged from the outlet of the Class I waste rock bin and transfers it to the sorting belt. A Class I waste rock coarse polishing magnetic pulley is installed at the end of the sorting belt. A Class II waste rock transport and sorting belt may also include a discharge belt and a sorting belt. The discharge belt receives Class II waste rock discharged from the outlet of the Class II waste rock bin and transfers it to the sorting belt. A Class II waste rock coarse polishing magnetic pulley is installed at the end of the sorting belt.

[0039] It should be noted that, in this embodiment, the end where the sorting belt and the discharge belt overlap in spatial position is the feeding section, and the end away from the feeding section is the tail section.

[0040] In this embodiment of the invention, the speed of the sorting belt in the first type of waste rock transport and sorting belt can be controlled at 1.5~2.0m / s and the concentrate yield is 40~45%, while the speed of the sorting belt in the second type of waste rock transport and sorting belt can be controlled at 2.0~2.5m / s and the concentrate yield is 10~20%.

[0041] The following specific embodiments illustrate the waste rock classification process of the waste rock identification and classification device and the coarse magnetic separation process of the classified waste rock by the coarse magnetic separation device. It should be understood that the following embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0042] like Figure 2As shown, the waste rock identification and sorting device includes a waste rock identification system 1, a conveyor belt D-1#, and a reversible waste rock transfer belt D-2#. The waste rock identification system 1 uses X-ray fluorescence to analyze the TiO2 and TFe content in the waste rock. If the TiO2 content > 4% and / or the TFe content > 13%, a signal to move to the left is sent to the control box of the reversible waste rock transfer belt D-2#. Upon receiving the signal, the control box controls the belt to move to the left, transferring the waste rock into the first-class waste rock bin. If the TiO2 content ≤ 4% and the TFe content ≤ 13%, a signal to move to the right is sent to the control box of the reversible waste rock transfer belt D-2#. Upon receiving the signal, the control box controls the belt to move to the right, transferring the waste rock into the second-class waste rock bin, thereby achieving waste rock sorting and storage.

[0043] like Figure 2 As shown, Figure 2 The waste rock bins, discharge belts D-3# and D-7#, and sorting belts D-5# and D-9# constitute a coarse magnetic separation device for waste rock. The coarse magnetic pulleys for waste rock are installed at the tail of D-5# and D-9#. Figure 2 The Class II waste rock bins, discharge belts D-4# and D-8#, and sorting belts D-6# and D-10# constitute the Class II waste rock coarse-throwing magnetic separation device. The Class II waste rock coarse-throwing magnetic pulleys are installed at the tail of D-6# and D-10#.

[0044] Type I waste rock is transported from the bottom discharge port of the silo to the sorting belts D-5# and D-9# via discharge belts D-3# and D-7#. The further sorting belts D-5# and D-9# are set to convey material at a speed of 2.0 m / s and are equipped with magnetic pulleys at their tail ends to separate the Type I waste rock into concentrate and tailings. The concentrate yield of the magnetic pulley sorting is 42.6%.

[0045] The Class II waste rock is fed into the sorting belts D-6# and D-10# via the discharge outlet at the bottom of the silo and the discharge belts D-4# and D-8#. The sorting belts D-6# and D-10# are controlled at a speed of 2.5 m / s and are equipped with magnetic pulleys at the tail end to separate the Class II waste rock into concentrate and tailings. The concentrate yield is 12.3%.

[0046] The first-class waste rock coarse concentrate and the second-class coarse concentrate are combined and fed into the medium crushing and screening unit 30 for subsequent process processing.

[0047] The Class I waste rock tailings and Class II waste rock tailings are respectively fed into the waste rock tailings emission control device 70 for subsequent process treatment.

[0048] In this embodiment of the invention, by introducing a waste rock identification and classification device 10, the extracted waste rock can be identified and automatically sorted in real time based on the content of valuable components in the waste rock, and the sorted Class I and Class II waste rock can be stored separately, creating favorable conditions for subsequent differentiated resource utilization.

[0049] In this embodiment of the invention, high-value Class I waste rock is treated using mineral processing to recover valuable elements such as iron and titanium; low-value Class II waste rock is used specifically for preparing building aggregates. Compared to full resource utilization, the cost per ton of ore is reduced by more than 50%, and compared to full building material utilization, the resource recovery rate is increased to 40%, and the economic value is increased by more than 60%. This strategy comprehensively considers resource recovery rate and processing cost, ensuring the economic feasibility of the overall solution and possessing the potential for industrial-scale promotion.

[0050] In this embodiment of the invention, by controlling the sorting belts in the Class I waste rock transport and sorting belts and the Class II waste rock transport and sorting belts to have different speeds, the matching problem of processing capacity and timing between the coarse waste disposal operation and the subsequent medium crushing operation is effectively solved, the adjustment capability and operational stability of the entire crushing process are enhanced, and the work efficiency is improved.

[0051] In some embodiments, such as Figure 1 The intermediate crushing and screening device 30 shown may include: a pre-intermediate crushing buffer bin, an intermediate crushing buffer bin, an intermediate particle crusher, a screening buffer bin, and a screening machine connected in sequence. The pre-intermediate crushing buffer bin is connected to a coarse magnetic separation device. The screening machine is connected to both a fine crushing and screening device 40 and a fine magnetic separation device 50, for feeding the oversize material into the fine crushing and screening device 40 and the fine magnetic separation device 50. The fine crushing and screening device 40 includes: a fine particle buffer bin and a fine particle crusher connected in sequence. The fine particle buffer bin is connected to the screening machine of the intermediate crushing and screening device 30, and the fine particle crusher is connected to the screening buffer bin of the intermediate crushing and screening device 30. The discharge port diameter of the fine particle crusher is smaller than that of the intermediate crushing and screening device. The fine-dissipation magnetic separator 50 includes: a fine-dissipation buffer chamber, a fine-dissipation roughing magnetic separator, and a fine-dissipation scavenging magnetic separator connected in sequence. The fine-dissipation buffer chamber is connected to the screening machine of the intermediate crushing and screening device 30. The fine-dissipation roughing magnetic separator is used to perform magnetic separation on the fine-dissipation material to obtain fine-dissipation roughing concentrate and fine-dissipation roughing tailings. The fine-dissipation roughing tailings are fed into the fine-dissipation scavenging magnetic separator. The fine-dissipation scavenging magnetic separator is used to perform magnetic separation on the fine-dissipation roughing tailings to obtain fine-dissipation scavenging concentrate and fine-dissipation scavenging tailings. The fine-dissipation scavenging tailings are fed into the fine-dissipation tailings weight monitoring device 60.

[0052] In this embodiment of the invention, the material discharged from the pre-crushing buffer bin can be discharged to the intermediate crushing buffer bin via a discharge belt. The material discharged from the intermediate crushing buffer bin can be fed into the intermediate crusher via a feeding belt. The crushed material can be sequentially discharged to the screening buffer bin via a conveyor belt and a cloth belt. The material discharged from the screening buffer bin can be discharged to the screening machine via a discharge belt. The screening machine transfers the oversize material to the fine particle buffer bin. The fine particle buffer bin feeds the material into the fine particle crusher through a discharge port. The fine particle crusher feeds the crushed material into the screening buffer bin. The screening machine transfers the undersize material to the fine sintering buffer bin. The fine sintering buffer bin discharges the material through the discharge port to the fine sintering roughing magnetic separator. The fine sintering roughing magnetic separator performs magnetic separation on the fine sintering material to obtain fine sintering roughing concentrate and fine sintering roughing tailings. The fine sintering roughing tailings are then fed into the fine sintering scavenging magnetic separator. The fine scavenging magnetic separator performs magnetic separation on the fine sintering roughing tailings to obtain fine scavenging concentrate and fine scavenging tailings. The fine scavenging tailings are then fed into the fine scavenging tailings weight monitoring device 60.

[0053] In some specific embodiments, such as Figure 1The magnetic pulley tailings discharge port of the coarse waste rock ... The crusher feed belt head is connected; the discharge port of the medium-particle crusher is connected to the medium and fine crushing material conveyor belt, the medium and fine crushing material conveyor belt is connected to the screening buffer bin distribution belt, the distribution belt is connected to the screening buffer bin inlet, the screening buffer bin discharge port is connected to the screening feed belt, the screening feed belt is connected to the screening machine, the screening oversize discharge port is connected to the oversize transfer belt, the transfer belt is connected to the fine crushing buffer bin distribution belt, the fine crushing buffer bin distribution belt is connected to the fine crushing buffer bin inlet, and the fine crushing buffer bin... The discharge port is connected to the feed belt of the fine crusher; the discharge port of the fine crusher is connected to the conveyor belt for medium and fine crushed materials; the discharge port of the undersize material from the screening machine is connected to the undersize material transfer belt; the undersize material transfer belt is connected to the feeding belt of the fine throwing buffer silo; the feeding belt of the fine throwing buffer silo is connected to the feed inlet of the fine throwing buffer silo; the discharge port of the fine throwing buffer silo is connected to the feed inlet of the fine throwing roughing dry magnetic separator; the concentrate discharge port of the fine throwing roughing magnetic separator is connected to the concentrate conveyor belt; the tailings discharge port of the fine throwing roughing tailings separator is connected to the feed inlet of the fine throwing scavenging magnetic separator. The fine scavenging concentrate discharge port is connected to the fine scavenging concentrate conveyor belt, the fine scavenging tailings discharge port is connected to the fine scavenging tailings weight monitoring device 60 and the fine scavenging tailings conveyor belt, the fine scavenging tailings conveyor belt is equipped with a weighing scale at the end of the fine scavenging tailings conveyor belt, the fine scavenging tailings conveyor belt is connected to the main tailings conveyor belt, and the fine scavenging concentrate conveyor belt is connected to the external ore storage bin. The concentrate is transported to the concentrator for further processing and utilization via conveyor belts. The concentrate product contains 7.5~10% TiO2 and 17.5~20% TFe.

[0054] This embodiment effectively improves the recovery rate of titanium and iron resources in the waste rock tailings of vanadium-titanium magnetite mining by using a combined screening and magnetic separation scheme of medium crushing screening, fine crushing screening, and fine magnetic separation, thus solving the problems of resource waste and environmental pressure caused by the stockpiling of large amounts of waste rock.

[0055] In some specific embodiments, the volume ratio of the intermediate crushing buffer chamber to the intermediate crushing pre-buffer chamber is 1:10 to 1:15.

[0056] In some specific embodiments, the discharge port diameter of the medium crusher is controlled within the range of 45~55mm.

[0057] In some specific embodiments, the diameter of the discharge port of the fine crusher is controlled within the range of 15~25mm.

[0058] In some specific embodiments, the screening machine is a banana screen with a screen aperture size of 8mm, 10mm or 15mm, preferably 10mm.

[0059] This embodiment effectively solves the matching problem of processing capacity and timing between coarse waste disposal and subsequent medium crushing operations by setting up a buffer silo before medium crushing and a buffer silo with optimized volume ratio. The material buffer time is adjusted to more than 24 hours, which enhances the adjustment capability and operational stability of the entire crushing process and provides a basis for the rational selection of downstream equipment. The equipment design processing capacity can be increased by 30-40%, the number of equipment can be reduced by 20-30%, and the large-scale processing equipment is realized.

[0060] The following describes the material processing of the medium crushing and screening device, the fine crushing and screening device, the fine throwing magnetic separation device, and the fine throwing tailings weight monitoring device with specific embodiments. It should be understood that the following embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0061] like Figure 2As shown, the coarse waste rock concentrate from Class I and Class II is fed together into the pre-crushing buffer bin of the medium crushing and screening unit; the tailings from the magnetic pulley separation are fed into the coarse waste tailings conveyor belt D-12#; the separated concentrate in the pre-crushing buffer bin is fed into the coarse waste concentrate product conveyor belt D-18# via discharge belts D-14# and D-15#, and then into the medium crushing buffer bin via the coarse waste concentrate product conveyor belt D-18#. The volume ratio of the medium crushing buffer bin to the pre-crushing buffer bin is 1:15. The material in the medium crushing buffer bin is fed into the medium crusher 4 via the medium crusher feed belt D-19#, controlling the discharge port diameter to 48mm. The crushed material is fed into the screening buffer bin via the medium and fine crushing material conveyor belt D-23# and the screening buffer bin distribution belt D-24#. The screening buffer bin feeds medium-sized crushed material into the screening machine 6 via the screening feed belt D-25#. The screening machine is a banana screen with a screen aperture of 10mm, separating the material into two particle sizes: +10mm (oversize) and -10mm (undersize). The oversize material discharge is connected to the fine crushing buffer bin's feed belt D-20# via the oversize transfer belt D-22#. The fine crushing buffer bin's discharge port is connected to the fine crusher's feed belt D-21#, feeding the material into the fine crusher 5. The fine crusher 5's discharge port diameter is 18mm, and the finely crushed material is fed into the medium-fine crushing material transport belt D-23#. The undersize material discharge is transported to the fine crushing buffer bin's feed belt D-28# via the undersize transfer belt D-26# and the transfer belt D-27#, and then fed into the fine crushing buffer bin. The fine-dissipation buffer bin feeds material into the fine-dissipation roughing magnetic separator 2 via the fine-dissipation discharge belt D-29#, separating the material into roughing concentrate and roughing tailings. The roughing concentrate is fed into the concentrate conveyor belt D-30#, and the fine-dissipation tailings are fed into the fine-dissipation scavenging magnetic separator 3 via the discharge port, separating the material into scavenging concentrate and scavenging tailings. The scavenging concentrate is fed into the fine-dissipation concentrate conveyor belt D-30#, and the fine-dissipation tailings (including roughing tailings and scavenging tailings) are fed into the fine-dissipation tailings conveyor belt D-32#. A metering scale 8 is installed at the tail end of the fine-dissipation tailings conveyor belt D-32#, and the tailings are fed into the total tailings conveyor belt D-17# via the fine-dissipation tailings conveyor belt D-32#. The D-32# fine concentrate conveyor belt feeds the concentrate product into the external ore storage silo, and then transports it to the concentrator for further processing and utilization. The concentrate product contains 8.2% TiO2 and 19.4% TFe.

[0062] This embodiment effectively improves the recovery rate of titanium and iron resources in the waste rock tailings of vanadium-titanium magnetite mining by using a combined screening and magnetic separation scheme of medium crushing screening, fine crushing screening, and fine magnetic separation, thus solving the problems of resource waste and environmental pressure caused by the stockpiling of large amounts of waste rock.

[0063] In some embodiments, such as Figure 1The coarse tailings discharge control device 70 shown includes: a coarse tailings crusher, a coarse tailings transfer bin, and a vibrating feeder connected in sequence. The feed inlet of the coarse tailings crusher is connected to the coarse tailings conveyor belt, the feed inlet of the coarse tailings crusher is connected to the feed inlet of the coarse tailings transfer bin, the discharge outlet of the coarse tailings transfer bin is connected to the vibrating feeder, and the vibrating feeder is communicatively connected to a fine tailings weight monitoring device. The vibrating feeder is used to obtain the weight of the fine tailings from the fine tailings weight monitoring device and control the amount of coarse tailings fed into the total tailings conveyor belt according to the obtained weight of the fine tailings.

[0064] Specifically, the magnetic pulley tailings discharge port is connected to the coarse tailings conveyor belt, which in turn is connected to the coarse tailings crushing feed belt. The coarse tailings crushing feed belt is connected to the coarse crusher feed inlet. The coarse crusher discharge port diameter is controlled at 40-50mm. The coarse tailings crusher discharge port is connected to the coarse tailings transfer bin feed inlet, which is then connected to the vibrating feeder. A weighing scale is installed at the end of the fine tailings conveyor belt to acquire the weight signal of the material on the belt. This signal is then fed back to the vibrating feeder control box. The control box adjusts the vibration frequency to 500-1000 times / min based on the signal. The corresponding relationship curve is shown in the figure. Figure 3 As shown, the discharge port of the vibrating feeder is connected to the conveyor belt of the main coarse tailings. In the main tailings, the proportion of -5mm material is 3~5%, 5~10mm material is 20~30%, 10~20mm material is 40~50%, 20~40mm material is 10~20%, and +40mm material is 3~5%. The aggregate particle size distribution is reasonable, making it a high-quality concrete aggregate.

[0065] This invention significantly improves the recovery rate of building aggregates through a combined scheme of coarse tailings crushing, coarse tailings transfer bins, and weight-monitored vibratory feeding. By establishing a signal linkage control mechanism between fine tailings metering and coarse tailings discharge, this mechanism automatically adjusts the discharge rhythm of coarse tailings based on real-time fluctuations in the fine tailings quantity. This effectively avoids the risk of belt conveyor overload caused by sudden changes in material quantity, ensuring the stable operation of the overall tailings transportation system. Simultaneously, this regulation also helps stabilize the overall particle size distribution of the mixed tailings, ensuring the production of consistently high-quality sand and gravel aggregates.

[0066] The following describes the coarse tailings treatment process of the coarse tailings discharge control device with reference to specific embodiments. It should be understood that the following embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0067] like Figure 2As shown, Class I and Class II coarse tailings are fed into the coarse tailings crusher 9 of the coarse tailings discharge control device via magnetic pulley tailings discharge ports and coarse tailings conveyor belts D-12# and D-13#, respectively. The discharge port diameter of the coarse tailings crusher 9 is controlled at 45mm. The discharge from the coarse tailings crusher 9 is fed into the coarse tailings transfer bin. The discharge port of the coarse tailings transfer bin is equipped with a vibrating feeder 7, which is linked to the weighing signal of the fine tailings conveyor belt D-32#. Figure 2 The relationship between the measured weight and the vibration frequency was used to adjust the vibration frequency. In the final total tailings, the proportion of -5mm material was 4.3%, 5~10mm material was 28.5%, 10~20mm material was 47.2%, 20~40mm material was 16.7%, and +40mm material was 3.3%. The particle size distribution of the aggregate was reasonable, making it a high-quality concrete aggregate.

[0068] This invention establishes a signal linkage control mechanism for fine tailings metering and coarse tailings discharge through the above-described scheme. This linkage mechanism can automatically adjust the discharge rhythm of coarse tailings based on real-time fluctuations in the amount of fine tailings, effectively avoiding the risk of belt conveyor overload caused by sudden changes in material quantity and ensuring the stable operation of the total tailings transportation system. Simultaneously, this regulation also helps stabilize the overall particle size distribution of the mixed tailings, ensuring the production of stable-quality sand and gravel aggregate products.

[0069] Based on the same inventive concept, according to another aspect of the present invention, embodiments of the present invention also provide a method for recycling waste rock from vanadium-titanium magnetite mining, such as... Figure 4 As shown, the method includes steps S10 to S50.

[0070] S10. Using a waste rock identification and classification device, the waste rock is classified according to the TiO2 content and TFe content to obtain Class I waste rock material and Class II waste rock material.

[0071] S20. Using a coarse magnetic separation device, coarse magnetic separation is performed on Class I waste rock materials and Class II waste rock materials based on different magnetic field strengths to obtain coarse concentrate and coarse tailings.

[0072] S30. The coarse crushed concentrate is crushed and screened by a medium crushing and screening device to obtain the medium crushing oversize and medium crushing undersize.

[0073] S40. The material on the medium crushing screen is crushed and screened by a fine crushing and screening device to obtain the material under the fine crushing screen.

[0074] S50. Fine crushed undersize material and medium crushed undersize material are magnetically separated by a fine crushing magnetic separation device to obtain fine crushing concentrate and fine crushing tailings.

[0075] In this embodiment of the invention, the above-mentioned technical solution of waste rock classification and identification - coarse magnetic separation - medium crushing and screening - fine crushing and screening device - fine magnetic separation is used to recycle and utilize waste rock from vanadium-titanium magnetite mining. This greatly improves the recovery rate of titanium and iron resources, increases the recovery rate of building aggregates, and reduces the resource waste and environmental pressure caused by the stockpiling of large amounts of waste rock.

[0076] In some embodiments, such as Figure 4 The vanadium-titanium magnetite mining waste rock recycling method shown may include steps S10-S50, and may also include steps S60-S80.

[0077] S60. Monitor the weight of the fine tailings using a fine tailings weight monitoring device, and feed the fine tailings into the main tailings conveyor belt.

[0078] S70. The coarse tailings are fed into the coarse tailings discharge control device via a coarse tailings conveyor belt.

[0079] S80. Obtain the weight of the fine tailings from the fine tailings weight monitoring device through the coarse tailings discharge control device, and control the amount of coarse tailings fed into the total tailings conveyor belt based on the obtained weight of the fine tailings.

[0080] This invention establishes a signal linkage control mechanism for fine tailings metering and coarse tailings discharge through the above-described scheme. This linkage mechanism can automatically adjust the discharge rhythm of coarse tailings based on real-time fluctuations in the amount of fine tailings, effectively avoiding the risk of belt conveyor overload caused by sudden changes in material quantity and ensuring the stable operation of the total tailings transportation system. Simultaneously, this regulation also helps stabilize the overall particle size distribution of the mixed tailings, ensuring the production of stable-quality sand and gravel aggregate products.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A waste rock recycling system for vanadium-titanium magnetite mining, characterized in that, include: The waste rock identification and classification device, coarse magnetic separation device, medium crushing and screening device, fine crushing and screening device and fine magnetic separation device are connected in sequence. The waste rock identification and classification device is used to classify waste rock based on the TiO2 content and TFe content in the waste rock to obtain Class I waste rock material and Class II waste rock material. The coarse magnetic separation device is used to perform coarse magnetic separation on Class I and Class II waste rock materials based on different magnetic field strengths to obtain coarse concentrate and coarse tailings. The medium crushing and screening device is used to perform medium crushing and screening of the coarse ore concentrate to obtain medium crushing oversize and medium crushing undersize. The fine crushing and screening device is used to crush and screen the material on the medium crushing screen to obtain the fine crushed material under the screen. The fine-displacement magnetic separator is used to perform magnetic separation on the fine crushed undersize material and the medium crushed undersize material to obtain fine-displacement concentrate and fine-displacement tailings.

2. The system according to claim 1, characterized in that, Also includes: The coarse tailings conveyor belt, the coarse tailings discharge control device, and the fine tailings weight monitoring device; The coarse tailings conveyor belt is connected to the coarse tailings discharge control device and the coarse magnetic separation device, respectively, for receiving the coarse tailings discharged by the coarse magnetic separation device and feeding the coarse tailings into the coarse tailings discharge control device. The fine tailings weight monitoring device is connected to the coarse tailings discharge control device and the fine tailings magnetic separator, respectively. The fine tailings weight monitoring device is used to monitor the weight of the fine tailings and feed the fine tailings into the main tailings conveyor belt. The coarse tailings discharge control device is used to obtain the weight of the fine tailings from the fine tailings weight monitoring device and control the amount of coarse tailings fed into the main tailings conveyor belt according to the obtained weight of the fine tailings.

3. The system according to claim 2, characterized in that, The TiO2 content of the first type of waste rock material is >4% and / or the TFe content is >13%, while the TiO2 content of the second type of waste rock material is ≤4% and the TFe content is ≤13%.

4. The system according to claim 3, characterized in that, The coarse waste rock magnetic separation device includes: a Class I waste rock coarse waste rock magnetic separation device and a Class II waste rock coarse waste rock magnetic separation device; The first type of waste rock coarse magnetic separation device is used to perform coarse magnetic separation on the first type of waste rock material to obtain a first type of coarse magnetic concentrate and a first type of coarse magnetic tailings; the second type of waste rock coarse magnetic separation device is used to perform coarse magnetic separation on the second type of waste rock material to obtain a second type of coarse magnetic concentrate and a second type of coarse magnetic tailings. The magnetic field strength for coarse magnetic separation of the first type of waste rock material is higher than that for coarse magnetic separation of the second type of waste rock material.

5. The system according to claim 4, characterized in that, The first-class waste rock coarse-throwing magnetic separator includes: a first-class waste rock bin, at least one first-stage first-class waste rock transport and sorting belt, and a first-class waste rock coarse-throwing magnetic pulley; wherein, the inlet of the first-class waste rock bin is connected to the waste rock identification and classification device, the outlet of the first-class waste rock bin is connected to one end of the first-class waste rock transport and sorting belt, and the first-class waste rock coarse-throwing magnetic pulley is installed at the other end of the first-class waste rock transport and sorting belt; The Class II waste rock coarse-throwing magnetic separator includes: a Class II waste rock bin, at least one Class II waste rock transport and sorting belt, and a Class II waste rock coarse-throwing magnetic pulley; wherein, the inlet of the Class II waste rock bin is connected to the waste rock identification and classification device, the outlet of the Class II waste rock bin is connected to one end of the Class II waste rock transport and sorting belt, and the Class II waste rock coarse-throwing magnetic pulley is installed at the other end of the Class II waste rock transport and sorting belt.

6. The system according to claim 2, characterized in that, The medium crushing and screening device includes: a medium crushing pre-buffer bin, a medium crushing buffer bin, a medium-particle crusher, a screening buffer bin, and a screening machine connected in sequence. The medium crushing pre-buffer bin is connected to the coarse magnetic separation device, and the screening machine is connected to the fine crushing and screening device and the fine magnetic separation device respectively. The screening machine is used to feed the material on the screen into the fine crushing and screening device, and to feed the material on the screen into the fine throwing magnetic separation device. The volume of the pre-crushing buffer chamber is larger than the volume of the intermediate crushing buffer chamber.

7. The system according to claim 6, characterized in that, The fine crushing and screening device includes: a fine particle buffer bin and a fine particle crusher connected in sequence. The fine particle buffer bin is connected to the screening machine of the medium crushing and screening device, and the fine particle crusher is connected to the screening buffer bin of the medium crushing and screening device. The discharge port diameter of the fine particle crusher is smaller than that of the medium crusher.

8. The system according to claim 6, characterized in that, The fine-dissipation magnetic separator includes: a fine-dissipation buffer chamber, a fine-dissipation roughing magnetic separator, and a fine-dissipation scavenging magnetic separator connected in sequence. The fine-dissipation buffer chamber is connected to the screening machine of the intermediate crushing and screening device. The fine-dissipation roughing magnetic separator is used to perform magnetic separation on the fine-dissipation material to obtain fine-dissipation roughing concentrate and fine-dissipation roughing tailings. The fine-dissipation roughing tailings are fed into the fine-dissipation scavenging magnetic separator, which is used to perform magnetic separation on the fine-dissipation roughing tailings to obtain fine-dissipation scavenging concentrate and fine-dissipation scavenging tailings. The fine-dissipation scavenging tailings are fed into a fine-dissipation tailings weight monitoring device.

9. The system according to claim 2, characterized in that, The coarse tailings discharge control device includes: a coarse tailings crusher, a coarse tailings transfer bin, and a vibrating feeder connected in sequence. The feed inlet of the coarse tailings crusher is connected to the coarse tailings conveyor belt, the feed inlet of the coarse tailings crusher is connected to the feed inlet of the coarse tailings transfer bin, the discharge outlet of the coarse tailings transfer bin is connected to the vibrating feeder, and the vibrating feeder is communicatively connected to the fine tailings weight monitoring device. The vibrating feeder is used to obtain the weight of the fine tailings from the fine tailings weight monitoring device and control the amount of coarse tailings fed into the total tailings conveyor belt according to the obtained weight of the fine tailings.

10. A method for recovering waste rock from vanadium-titanium magnetite mining, characterized in that, The method, applied to the vanadium-titanium magnetite mining waste rock recovery system as described in any one of claims 1 to 9, comprises: The waste rock is classified into Class I and Class II waste rock materials based on the TiO2 and TFe content in the waste rock using a waste rock identification and classification device. Using a coarse magnetic separation device, Class I and Class II waste rock materials are coarsely magnetically separated based on different magnetic field strengths to obtain coarse concentrate and coarse tailings. The coarse ore concentrate is subjected to medium crushing and screening by a medium crushing and screening device to obtain medium crushing oversize and medium crushing undersize. The material on the medium crushing screen is crushed and screened by a fine crushing and screening device to obtain the fine crushed material under the screen. The fine crushed undersize material and the medium crushed undersize material are magnetically separated by a fine-dispersion magnetic separator to obtain fine-dispersion concentrate and fine-dispersion tailings.

Images