A mineral processing method and mineral processing system

Abstract

The present invention provides a mineral processing method and a mineral processing system. The mineral processing method comprises: feeding the crushed product into a grinding device for a grinding; feeding the product after grinding into a grinding device into a mineral processing device for gradual classification, pre-magnetization and separation to obtain preliminary tailings and preliminary concentrates; feeding the preliminary concentrate into the concentrate processing device for concentrate treatment to obtain a final concentrate product; feeding the preliminary tailings into the tailings processing device for tailings treatment to obtain the final tailings after treatment. The present invention uses a pre-magnetizer in conjunction with a separation device to pre-magnetize and aggregate the fine-grained minerals in the slurry, so that the magnetic group can overcome the impact of the water in the device, reduce the impact of the water impact on the movement trajectory of the fine-grained minerals, prolong the residence time of the fine-grained minerals in the separation area of ​​the device, so that the magnetic group can be separated into the concentrate slurry by the device, reduce the amount of concentrate tailings in the mineral processing process, and improve the concentrate yield and recovery rate.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral processing, and in particular to a mineral processing method and a mineral processing system. Background Art

[0002] my country is rich in mineral resources, but there are more poor ores and fewer rich ores, with fine embedded particles, many associated elements, and complex deposit types. With the continuous development and utilization of mineral resources, the characteristics of "poor, fine, and mixed" in my country's mineral resources are becoming increasingly apparent, and the iron ore is mined at a low grade and fine particle size. The development and utilization of resources is more difficult than before. It is necessary to increase the grinding fineness to allow the mineral particles to achieve monomer dissociation, which also causes the selected mineral particles to become finer and finer. In many cases, this low-concentration fine-grained mineral is washed into the tailings slurry by the impact of water in the equipment before being selected, causing problems such as tailings. Therefore, the current requirements for the design of this fine grinding and mineral processing process are also higher. The mineral processing process must have a certain degree of advancement and reliability, which is conducive to the effective and comprehensive utilization of mineral resources and the improvement of the level of mineral processing technology. Therefore, the selection process is optimized and improved to obtain a new selection process that can not only meet the requirements of mineral processing technical indicators, but also improve the selection efficiency. Summary of the invention

[0003] In view of this, the present invention proposes a mineral processing method and a mineral processing system which can achieve the technical indicators of mineral processing and improve the efficiency of mineral processing, reduce the discarding of concentrate and improve the yield of concentrate. The invention aims to solve the problem that the mineral particles being separated in the prior art are washed into the tailings slurry by the impact of water in the equipment without being separated, causing tailings running.

[0004] On the one hand, the present invention proposes a mineral processing method, which includes the following steps: a grinding step, feeding the crushed product into a grinding device for a stage of grinding; a mineral processing step, feeding the product after grinding in the grinding device into a mineral processing device for gradual classification, pre-magnetization and separation to obtain preliminary tailings and preliminary concentrates; a concentrate processing step, feeding the preliminary concentrate into a concentrate processing device for concentrate processing to obtain a final concentrate product; a tailings processing step, feeding the preliminary tailings into a tailings processing device for tailings processing to obtain the final tailings after processing.

[0005] Furthermore, in the above-mentioned mineral processing method, the mineral processing step includes the following sub-steps: a grinding and classification sub-step, feeding the ground product into a classification device for a classification operation to obtain a coarse-grained product and a fine-grained product after a classification; a preliminary pre-magnetization sub-step, feeding the fine-grained product obtained after a classification into a first pre-magnetizer for pre-magnetization to obtain a pre-magnetized agglomerated slurry; a primary separation sub-step, feeding the slurry pre-magnetized and agglomerated by the first pre-magnetizer into a first separation device for at least one stage of primary separation operation to obtain a first separation concentrate product and a first separation tailings product, and the first separation tailings product is used as a preliminary tailings; a secondary classification sub-step, feeding the first separation into a first separation. The concentrate product is fed into a two-stage classification device for two-stage classification operation to obtain a coarse-grained product and a fine-grained product after the two-stage classification; in a second pre-magnetization sub-step, the fine-grained product after the second stage classification is fed into a second pre-magnetizer for pre-magnetization operation to obtain a re-magnetized and agglomerated slurry; in a second sorting sub-step, the slurry pre-magnetized and agglomerated by the second pre-magnetizer is fed into a second sorting device for at least one stage of re-sorting operation to obtain a second sorted concentrate product and a second sorted tailings product, the second sorted concentrate product is fed into the concentrate processing equipment as a preliminary concentrate, the second sorted tailings product and the first sorted tailings product are fed into the tailings processing equipment as preliminary tailings.

[0006] Furthermore, in the above-mentioned mineral processing method, the mineral processing step also includes the following sub-steps: a coarse-particle grinding sub-step, returning the coarse-particle product after a stage of classification to a first-stage grinding equipment for re-grinding, and feeding the product obtained by the re-grinding into a first-stage classification equipment to form a closed-circuit grinding cycle.

[0007] Furthermore, in the above-mentioned mineral processing method, the mineral processing step also includes the following sub-steps: a re-grinding sub-step, feeding the coarse-grained product after the second-stage classification into the second-stage grinding equipment for second-stage grinding, and returning the product after the second-stage grinding to the second-stage classification equipment for classification, and the second-stage grinding and second-stage classification form a grinding and classification closed-loop circulation process.

[0008] Furthermore, in the above-mentioned mineral processing method, in the tailings processing step, before the preliminary tailings are fed into the tailings processing equipment, they are pre-magnetized by a third pre-magnetizer and then fed into the tailings processing equipment for tailings processing; and / or, in the concentrate processing step, before the preliminary concentrate is fed into the concentrate processing equipment, they are pre-magnetized by a fourth pre-magnetizer and then fed into the concentrate processing equipment for concentrate processing.

[0009] On the other hand, the present invention proposes a mineral processing system, which includes: a first-stage grinding equipment, a mineral processing equipment, a concentrate processing equipment and a tailings processing equipment; wherein the first-stage grinding equipment is used to perform a first-stage grinding treatment on the crushed product; the inlet of the mineral processing equipment is connected with the outlet of the first-stage grinding equipment, and is used to receive the product after grinding by the first-stage grinding equipment, and gradually classify, pre-magnetize and select the product after grinding to obtain preliminary tailings and preliminary concentrates; the inlet of the concentrate processing equipment is connected with the concentrate outlet of the mineral processing equipment, and is used to receive the preliminary concentrate, and perform concentrate treatment on the preliminary concentrate to obtain a final concentrate product; the inlet of the tailings processing equipment is respectively connected with the tailings outlet of the mineral processing equipment, and is used to perform tailings treatment on the preliminary tailings to obtain the final tailings after treatment.

[0010] Furthermore, in the above-mentioned mineral processing system, the mineral processing equipment includes: a first-stage classification device, a first pre-magnetizer, a first separation device, a second-stage classification device, a second pre-magnetizer, and a second separation device; wherein the inlet of the first-stage classification device is connected to the outlet of the first-stage grinding device, for receiving the product after grinding by the first-stage grinding device, and performing a first-stage classification operation on the product after grinding to obtain a first-stage classified coarse-grained product and a first-stage classified fine-grained product; the inlet of the first pre-magnetizer is connected to the fine-grained outlet of the first-stage classification device, for receiving the first-stage classified fine-grained product, and pre-magnetizing the first-stage classified fine-grained product to obtain a pre-magnetized agglomerated slurry; the inlet of the first separation device is connected to the outlet of the first pre-magnetizer, for receiving the pre-magnetized agglomerated slurry, and performing at least one stage of primary separation operation on the pre-magnetized agglomerated slurry to obtain a first separation concentrate product and a first separation tailings product; The inlet of the two-stage classification equipment is connected to the concentrate outlet of the first sorting equipment, and is used to receive the first sorted concentrate product, and perform a two-stage classification operation on the first sorted concentrate product to obtain a coarse-grained product and a fine-grained product after the two-stage classification; the inlet of the second pre-magnetizer is connected to the fine-grained outlet of the two-stage classification equipment, and is used to receive the fine-grained product after the two-stage classification, and perform a pre-magnetization operation on the fine-grained product after the two-stage classification to obtain a re-magnetized agglomerated slurry; the inlet of the second sorting equipment is connected to the outlet of the second pre-magnetizer, and is used to receive the re-magnetized agglomerated slurry, and the re-magnetized agglomerated slurry is subjected to at least one stage of re-sorting operation to obtain a second sorted concentrate product and a second sorted tailings product, the second sorted concentrate product is fed to the concentrate processing equipment as a preliminary concentrate, and the second sorted tailings product and the first sorted tailings product are fed to the tailings processing equipment as preliminary tailings.

[0011] Furthermore, in the above-mentioned mineral processing system, the coarse particle outlet of the first stage classification equipment is connected to the inlet of the first stage grinding equipment, so as to return the coarse particle product after the first stage classification to the first stage grinding equipment for re-grinding, and feed the product obtained by re-grinding into the first stage classification equipment, so as to form a closed-loop grinding cycle.

[0012] Furthermore, in the above-mentioned mineral processing system, the mineral processing equipment also includes: a two-stage grinding equipment; wherein the inlet of the second-stage grinding equipment is connected with the coarse-particle outlet of the second-stage classification equipment, for receiving the coarse-particle product after the second-stage classification, and grinding the coarse-particle product after the second-stage classification; the inlet of the second-stage classification equipment is also connected with the outlet of the second-stage grinding equipment, for returning the product after the second-stage grinding to the second-stage classification equipment for classification, so that the second-stage grinding equipment and the second-stage classification equipment form a closed-loop circulation process of grinding and classification.

[0013] Furthermore, in the above-mentioned mineral processing system, a third pre-magnetizer is connected to the inlet of the tailings processing equipment for pre-magnetizing the preliminary tailings, and feeding the pre-magnetized preliminary tailings into the tailings processing equipment for tailings processing; and / or a fourth pre-magnetizer is connected to the inlet of the concentrate processing equipment for pre-magnetizing the preliminary concentrate, and feeding the pre-magnetized preliminary concentrate into the concentrate processing equipment for concentrate processing.

[0014] The mineral processing method and mineral processing system provided by the present invention, after the crushed product is subjected to stage grinding by a grinding device, the grinding product is gradually graded, pre-magnetized and sorted by a mineral processing device to obtain preliminary tailings and preliminary concentrates; the preliminary concentrate is subjected to concentrate treatment by a concentrate processing device to obtain a final concentrate; the preliminary tailings are subjected to tailing treatment by a tailings processing device to obtain a final tailings after treatment. In the mineral processing system, a pre-magnetizer can be selected for use in conjunction with the sorting equipment. Before being fed into the sorting equipment after grading, pre-magnetization is mainly performed on fine-grained minerals with a pulp concentration of 5% to 30%. The pre-magnetized pulp is then fed into the sorting equipment for sorting. The fine-grained minerals in the pulp can be pre-magnetized and agglomerated, so that most of the fine-grained minerals in the low-concentration pulp are agglomerated into magnetic clusters, and their mass becomes larger. The gravity of the magnetic clusters themselves can overcome the impact of the water in the equipment, reducing the influence of the impact of the water on the movement trajectory of the magnetic clusters, and will not Before sorting, it enters the tailings overflow with the water flow, prolongs the residence time of fine-grained minerals in the equipment sorting area, enables the magnetic group to be sorted by the equipment into the concentrate slurry, reduces the amount of concentrate tailings in the beneficiation process, improves the concentrate yield and recovery rate, reduces the tailings grade, enables the minerals to be efficiently sorted and utilized, and solves the problem that due to the increasingly fine mineral particles being sorted, in many cases, such low-concentration fine-grained minerals are not sorted, but are rushed into the tailings slurry by the impact of the water in the equipment, causing tailings and other problems. At the same time, the beneficiation system is conducive to improving the effective and comprehensive utilization of mineral resources, improving the level of mineral processing technology, optimizing and improving the beneficiation process, and obtaining a new beneficiation method and beneficiation system that can meet the requirements of mineral processing technical indicators and improve the efficiency of beneficiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0016] Figure 1 A flowchart of a mineral processing method provided by an embodiment of the present invention;

[0017] Figure 2 A process flow chart of a mineral processing method provided by an embodiment of the present invention;

[0018] Figure 3 A flowchart of the mineral processing steps provided by an embodiment of the present invention;

[0019] Figure 4 Another flowchart of the mineral processing steps provided by the embodiment of the present invention;

[0020] Figure 5Another flowchart of the mineral processing steps provided by the embodiment of the present invention;

[0021] Figure 6 This is a structural block diagram of a mineral processing system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Method Example:

[0024] See also Figure 1 to Figure 2 , which shows the preferred process flow of the mineral processing method provided by the embodiment of the present invention. As shown in the figure, the mineral processing method includes the following steps:

[0025] In the grinding step S1, the crushed product is fed into a first-stage grinding equipment for first-stage grinding.

[0026] Specifically, the crushed product is fed into a first-stage grinding device, and the mineral is ground in the first-stage grinding device; wherein the first-stage grinding device may be a ball grinding device or other grinding devices, and this embodiment does not impose any limitation on the first-stage grinding device.

[0027] In the mineral processing step S2, the product after grinding by a first-stage grinding equipment is fed into the mineral processing equipment for gradual classification, pre-magnetization and separation to obtain preliminary tailings and preliminary concentrates.

[0028] Specifically, the product after grinding is fed into the mineral processing equipment, and is gradually classified, pre-magnetized and sorted in the mineral processing equipment. The classification, pre-magnetization and sorting can be carried out in one stage or in multiple stages. In this embodiment, two stages are taken as an example, for example, classification, pre-magnetization and sorting are carried out in sequence, and then classification, pre-magnetization and sorting are carried out again. Stage grinding, stage sorting, the ore is ground into the grinding equipment and then enters the classification. The coarse-grained product obtained by classification is returned to the mill for further grinding; the fine-grained product obtained by classification, after pre-magnetization by the pre-magnetizer, enters the sorting process for sorting.

[0029] In the concentrate processing step S3, the preliminary concentrate is fed into the concentrate processing equipment for concentrate processing to obtain a final concentrate product.

[0030] Specifically, the preliminary concentrate finally obtained by the mineral processing equipment is fed into the concentrate processing equipment, and the concentrate processing equipment can be processed, for example, to carry out concentrate dehydration treatment, and the final concentrate product is obtained after the treatment. Among them, in this embodiment, the concentrate processing equipment is a concentrate dehydration equipment to carry out concentrate dehydration treatment. This embodiment does not limit the treatment method and the number of treatment process sections. It can be a one-stage filtration, filter pressing or precipitation, or it can be a multi-stage treatment such as concentration followed by filtration or precipitation followed by filtration, so as to achieve the purpose of concentrate dehydration. In this embodiment, the overflow obtained by the concentrate processing equipment can also be used as circulating water for the entire separation process and fed to other locations where water needs to be added. In this embodiment, before the preliminary concentrate is fed into the concentrate processing equipment, it can be pre-magnetized by the fourth pre-magnetizer, and then fed into the concentrate processing equipment for concentrate dehydration treatment, so that it can be pre-magnetized and agglomerated before processing, that is, the particle size in the slurry is enlarged before the concentrate treatment is carried out, so that the magnetized slurry can achieve the effect of concentrate dehydration faster, thereby improving the ore dressing efficiency. Among them, the fourth pre-magnetizer can be an electromagnetic pre-magnetizer or a permanent magnet pre-magnetizer; the fourth pre-magnetizer can be a tubular pre-magnetizer or a box-type pre-magnetizer. This embodiment does not impose any limitation on the working principle, type, working mode, etc. of the fourth pre-magnetizer.

[0031] In the tailings treatment step S4, the preliminary tailings are fed into the tailings treatment equipment for tailings treatment, and the final tailings are obtained after the treatment.

[0032] Specifically, the preliminary tailings obtained in the mineral processing equipment are fed into the tailings processing equipment for tailings processing, and the tailings obtained after being processed by the tailings processing equipment are the final tailings. In this embodiment, the tailings processing equipment is a tailings dewatering equipment, and the processing method and the number of processing flow sections are not limited. It can be a one-stage concentration or filter press, or it can be a multi-stage treatment such as filter press after concentration, so as to achieve the purpose of tailings dewatering and facilitate the transportation of tailings to the tailings pond for storage. In this embodiment, before the preliminary tailings are fed into the tailings processing equipment, they can be pre-magnetized by the third pre-magnetizer, and then fed into the tailings processing equipment for tailings processing, so that before the preliminary tailings processing, they are pre-magnetized and agglomerated, that is, the tailings processing is performed after the particle size in the slurry becomes larger, so that the magnetized slurry can achieve the effect of tailings dewatering faster, thereby improving the ore dressing efficiency. Among them, the third pre-magnetizer can be an electromagnetic pre-magnetizer or a permanent magnet pre-magnetizer; the third pre-magnetizer can be a tubular pre-magnetizer or a box-type pre-magnetizer. This embodiment does not impose any limitation on the working principle, type, working mode, etc. of the third pre-magnetizer.

[0033] See also Figure 3 , which is a flowchart of the mineral processing steps provided by an embodiment of the present invention. Figure 2 and Figure 3 As shown, the mineral processing step S2 includes the following sub-steps:

[0034] In the grinding and classification sub-step S21, the ground product is fed into a classification device for a classification operation to obtain a coarse-grained product and a fine-grained product after a classification.

[0035] Specifically, the ground product obtained after a stage of grinding is fed into a stage of grading equipment for a stage of grading operation; wherein, the stage of grading equipment can be a hydrocyclone or other grading equipment, and this embodiment does not impose any limitation on the stage of grading equipment. Finally, after a stage of grading, a coarse-grained product and a fine-grained product after a stage of grading are obtained; wherein, due to different mineral properties, some minerals have large embedded particle sizes and can be dissociated without fine grinding; some minerals have small embedded particle sizes and need to be ground to be dissociated into monomers; therefore, the coarse-grained product and the fine-grained product can be determined according to actual conditions, such as the properties of the minerals, to determine the specific grading particle size, for example, a coarse-grained product greater than the first preset grading particle size after a stage of grading, and a fine-grained product less than or equal to the first preset grading particle size after a stage of grading. In this embodiment, the first preset grading particle size is not imposed any limitation. In this embodiment, the product after grinding is a slurry product containing water, and the coarse-grained product and the fine-grained product after a stage of grading are also slurries.

[0036] In the preliminary pre-magnetization sub-step S22, the fine-grained product obtained after the first stage of classification is fed into a first pre-magnetizer for pre-magnetization to obtain pre-magnetized agglomerated ore pulp.

[0037] Specifically, the fine-grained product obtained after a stage of classification operation must first be pre-magnetized by a first pre-magnetizer before being fed into the sorting equipment, so that the fine mineral particles in the slurry are pre-magnetized and agglomerated; wherein the first pre-magnetizer can be an electromagnetic pre-magnetizer or a permanent magnet pre-magnetizer; the first pre-magnetizer can be a tubular pre-magnetizer or a box-type pre-magnetizer. This embodiment does not impose any limitation on the working principle, type, working mode, etc. of the first pre-magnetizer.

[0038] In the primary separation sub-step S23, the ore pulp pre-magnetized and agglomerated by the first pre-magnetizer is fed into the first separation equipment for at least one stage of primary separation operation to obtain a first separation concentrate product and a first separation tailings product, and the first separation tailings product is used as the preliminary tailings.

[0039] Specifically, the ore pulp obtained after pre-magnetization by the first pre-magnetizer is fed to the first screening equipment for the initial screening operation; wherein the first screening equipment is a device for performing at least one stage of screening operation on the ore pulp after pre-magnetization by the pre-magnetizer, and, in the process of at least one stage of screening operation, the corresponding concentrate products obtained from each stage of screening are sequentially fed to the next stage of screening equipment for the subsequent stage of screening operation, until the last stage of screening operation obtains the minerals that meet the index requirements and the initial screening operation is completed, and the concentrate obtained from the last stage of screening operation is the concentrate of the initial screening operation, which is used as the first screening concentrate product; the initial screening operation The tailings obtained from each stage of the sorting operation are mixed into tailings as the first sorting tailings product; of course, each stage of the sorting operation can also be fed into other equipment for other treatments; the sorting methods of each stage in the initial sorting operation can be magnetic separation, or non-magnetic separation methods such as gravity separation, flotation, and electric separation. That is to say, the first sorting equipment includes several mineral processing equipment connected in sequence, which can be magnetic separation equipment, or non-magnetic separation equipment such as gravity separation equipment, flotation separation equipment, and electric separation equipment. This embodiment does not impose any limitation on the sorting operation method and sorting equipment. In this embodiment, two-stage ore dressing is used as an example: first, the ore pulp pre-magnetized by the first pre-magnetizer is fed into the first stage of ore dressing in the primary selection operation, and the concentrate obtained after the first stage of ore dressing is fed into the second stage of ore dressing for two-stage selection. The concentrate product after selection meets the selection index requirements of this stage, and the concentrate product obtained after the second stage of selection is used as the first selected concentrate product of the primary selection operation. The tailings of the first stage of selection and the second stage of selection are mixed as the first selected tailings product of the primary selection operation. Of course, the number of stages of the primary selection operation is not limited to the two-stage selection in this embodiment. The number of ore dressing stages can be one stage, two stages, or multiple stages, as long as the selected products meet the technical index requirements. Among them, the ore dressing equipment can be a magnetic suspension concentrator, a washing machine, a magnetic separation column, an electromagnetic vertical drum gravity magnetic separator, or a drum magnetic separator and other magnetic separation equipment, or it can be a flotation machine, a spiral chute and other non-magnetic separation equipment.

[0040] In the re-classification sub-step S24, the first selected concentrate product is fed into the second-stage classification equipment to perform a second-stage classification operation to obtain a coarse-grained product and a fine-grained product after the second-stage classification.

[0041] Specifically, the first selected concentrate product obtained from the initial selection operation is fed into the second-stage classification equipment for second-stage classification; wherein, the second-stage classification equipment can be a hydrocyclone or other classification equipment, and no limitation is made in this embodiment. After the second-stage classification, coarse-grained products and fine-grained products after the second-stage classification are obtained; wherein, due to different mineral properties, some minerals have large embedded particle sizes and can be dissociated without fine grinding; some minerals have small embedded particle sizes and need to be ground to be dissociated; therefore, the coarse-grained products and fine-grained products can be specifically defined according to actual conditions, such as the properties of the minerals, for example, the coarse-grained products greater than the second preset classification particle size are the coarse-grained products after the second-stage classification, and the fine-grained products less than or equal to the first preset classification particle size are the fine-grained products after the second-stage classification. In this embodiment, no limitation is made to the second preset classification particle size, that is, after the second-stage classification, the minerals that meet the particle size requirements, such as less than or equal to the second preset classification particle size, are used as fine-grained products, and the minerals that do not meet the particle size requirements, such as greater than the second preset classification particle size, are used as coarse-grained products.

[0042] In the re-premagnetization sub-step S25, the fine-grained product after the second stage classification is fed into a second pre-magnetizer for pre-magnetization to obtain a re-magnetized and agglomerated ore pulp.

[0043] Specifically, the fine-grained product obtained after the second-stage classification must first be pre-magnetized by a second pre-magnetizer before being fed into the selection equipment, so that the fine mineral particles in the slurry are pre-magnetized and agglomerated; wherein the second pre-magnetizer can be an electromagnetic pre-magnetizer or a permanent magnet pre-magnetizer; the second pre-magnetizer can be a tubular pre-magnetizer or a box-type pre-magnetizer. This embodiment does not impose any limitation on the working principle, type, working mode, etc. of the second pre-magnetizer.

[0044] In the re-selection sub-step S26, the slurry that has been pre-magnetized and agglomerated by the second pre-magnetizer is fed into the second selection equipment for at least one stage of re-selection operation to obtain a second selected concentrate product and a second selected tailings product. The second selected concentrate product is fed to the concentrate processing equipment as a preliminary concentrate, and the second selected tailings and the first selected tailings products are fed to the tailings processing equipment as preliminary tailings.

[0045] Specifically, the ore pulp obtained after pre-magnetization by the second pre-magnetizer is fed to the second screening equipment for re-screening operation; wherein, the second screening equipment is a device that performs at least one stage of screening operation on the ore pulp after pre-magnetization by the pre-magnetizer, and in the process of at least one stage of screening operation, the corresponding concentrate products obtained from each stage of screening are sequentially fed into the next stage of screening equipment for the subsequent stage of screening operation, until the last stage of screening operation obtains the mineral that meets the index requirements and the re-screening operation is completed, and the concentrate obtained from the last stage of screening operation is the concentrate of the re-screening operation, which is used as the first The second sorting concentrate product; the tailings obtained from each stage of the sorting operation in the second sorting operation are mixed into tailings as the second sorting tailings product; the sorting method of each stage in the second sorting operation can be magnetic separation, or it can be gravity separation, flotation, electric separation and other non-magnetic separation methods, that is, the second sorting equipment includes a number of mineral processing equipment connected in sequence, and the mineral processing equipment can be magnetic separation equipment, or it can be gravity separation equipment, flotation separation equipment, electric separation equipment and other non-magnetic separation equipment. This embodiment does not impose any limitation on the sorting operation method and sorting equipment. In this embodiment, two-stage mineral processing is used as an example: first, the ore pulp pre-magnetized by the second pre-magnetizer is fed into the first stage of mineral processing in the secondary selection operation, and the concentrate obtained after the first stage of mineral processing is fed into the second stage of mineral processing for the second stage of selection. The concentrate product after the selection meets the selection index requirements of this stage, and the concentrate product obtained after the second stage of selection is used as the second selected concentrate product of the secondary selection operation. The tailings of the first stage and the second stage of selection are mixed and used as the second selected tailings product of the secondary selection operation. Of course, the number of stages of the secondary selection operation is not limited to the two-stage selection in this embodiment. The number of mineral processing stages can be one stage, two stages, or multiple stages, as long as the selected products meet the technical index requirements.

[0046] See also Figure 4 , which is another flow chart of the mineral processing steps provided by the embodiment of the present invention. Figure 2 and Figure 4 As shown, the mineral processing step includes the following sub-steps:

[0047] In the grinding and classification sub-step S21, the ground product is fed into a classification device for a classification operation to obtain a coarse-grained product and a fine-grained product after the classification operation.

[0048] In the coarse-grain grinding sub-step S27, the coarse-grained product after the first stage of classification is returned to the first stage of grinding equipment for re-grinding, thereby forming a closed-circuit grinding cycle.

[0049] Specifically, the coarse-grained product obtained after the first-stage classification operation is directly returned to the first-stage grinding equipment for re-grinding, so that the first-stage classification equipment and the first-stage grinding equipment form a grinding closed-loop circulation operation, and the minerals in the grinding products obtained after the first-stage grinding whose particle size does not meet the first preset classification particle size requirement are circulated in the grinding equipment until the mineral particle size meets the requirement and leaves the circulation grinding-classification process, enters the first-stage classification equipment for a first-stage classification operation, and can be used as the fine-grained product of the first-stage classification operation. Among them, the first preset classification particle size requirement can be determined according to actual conditions, and is not limited in this embodiment.

[0050] In the preliminary pre-magnetization sub-step S22, the fine-grained product obtained after the first stage of classification is fed into a first pre-magnetizer for pre-magnetization to obtain pre-magnetized agglomerated ore pulp.

[0051] In the initial separation sub-step S23, the ore pulp that has been pre-magnetized and agglomerated by the first pre-magnetizer is fed into the first separation equipment for at least one stage of separation operation to obtain a first separation concentrate product and a first separation tailings product.

[0052] In the re-classification sub-step S24, the first selected concentrate product is fed into the second-stage classification equipment to perform a second-stage classification operation to obtain a coarse-grained product and a fine-grained product after the second-stage classification.

[0053] In the re-premagnetization sub-step S25, the fine-grained product after the second stage classification is fed into a second pre-magnetizer for pre-magnetization to obtain a re-magnetized and agglomerated ore pulp.

[0054] In the second sorting sub-step S26, the ore pulp that has been magnetized and agglomerated by the second pre-magnetizer is fed into the second sorting equipment for at least one stage of sorting operation to obtain a second sorting concentrate product and a second sorting tailings product.

[0055] See also Figure 5 , which is another flow chart of the mineral processing method provided by the embodiment of the present invention. Figure 2 and Figure 5 As shown, the mineral processing step includes the following sub-steps:

[0056] In the grinding and classification step S21, the ground product is fed into a classification device for a classification operation to obtain a coarse-grained product and a fine-grained product after the classification operation.

[0057] In the coarse-grained grinding step S27, the coarse-grained product after the first stage of classification is returned to the first stage of grinding equipment for re-grinding, and the product obtained by the re-grinding is fed into the first stage of classification equipment to form a closed-circuit grinding cycle.

[0058] In the preliminary pre-magnetization step S22, the fine-grained product obtained after the first stage of classification is fed into a first pre-magnetizer for pre-magnetization to obtain pre-magnetized agglomerated ore pulp.

[0059] In the initial separation step S23, the ore pulp that has been pre-magnetized and agglomerated by the first pre-magnetizer is fed into the first separation equipment for at least one stage of separation operation to obtain a first separation concentrate product and a first separation tailings product.

[0060] In the second classification step S24, the first selected concentrate product is fed into the second-stage classification equipment to perform a second-stage classification operation to obtain a coarse-grained product and a fine-grained product after the second-stage classification.

[0061] In the re-grinding step S28, the coarse-grained product after the second stage classification is fed into the second stage grinding equipment for second stage grinding, and the product after the second stage grinding is returned to the second stage classification equipment for classification. The second stage grinding and the second stage classification form a closed-loop circulation process of grinding and classification.

[0062] Specifically, the coarse-grained product after the second stage classification is fed into the second stage grinding equipment for second stage grinding, that is, ground again until the product meets the particle size requirements, and then returned to the second stage classification equipment for classification as the fine-grained product after the second stage classification.

[0063] In the re-premagnetization step S25, the fine-grained product after the second stage classification is fed into a second pre-magnetizer for pre-magnetization to obtain a re-magnetized agglomerated slurry.

[0064] In the second separation step S26, the ore pulp that has been magnetized and agglomerated by the second pre-magnetizer is fed into the second separation equipment for at least one stage of separation operation to obtain a second separation concentrate product and a second separation tailings product.

[0065] In other embodiments, the mineral processing step S2 may also include a grinding and classification sub-step S21, a coarse-grained grinding sub-step S27, a preliminary pre-magnetization sub-step S22, and a primary separation sub-step S23, or include: a grinding and classification sub-step S21, a preliminary pre-magnetization sub-step S22, and a primary separation sub-step S23, that is, forming a stage of classification, pre-magnetization and separation, and the first separation concentrate product and the first separation tailings product obtained in the primary separation sub-step S23 are used as the preliminary tailings and the preliminary concentrate respectively. It can also be multiple stages, for example Figures 3 to 5 In the embodiment shown, two stages are taken as an example, the tailings obtained in each stage are fed into the tailings treatment equipment as preliminary tailings, and the concentrate obtained in the last stage is fed into the concentrate treatment equipment as preliminary concentrate.

[0066] In this embodiment, the selection is stage grinding, and the number of grinding stages is not limited to two-stage grinding in this embodiment. The number of grinding stages can be one stage, two stages, or multiple stages, as long as the grinding product reaches the dissociation of mineral particle monomers.

[0067] In this embodiment, the pre-magnetizer can be used to pre-magnetize fine-grained minerals with a slurry concentration between 5% and 30%.

[0068] In this embodiment, the mineral processing method is not limited to the grinding and screening series process in this embodiment. For complex mineral processing processes, it is sufficient to set a pre-magnetizer after grinding and classification before entering the mineral processing equipment.

[0069] It should be noted that, since the mineral processing method and mineral processing system in this embodiment have the same principles, relevant parts can be referenced to each other.

[0070] In summary, the mineral processing system provided in this embodiment, after the crushed product is subjected to stage grinding by a grinding device, the ground product is gradually graded, pre-magnetized and sorted by a mineral processing device to obtain preliminary tailings and preliminary concentrates; the preliminary concentrate is subjected to concentrate treatment by a concentrate processing device to obtain a final concentrate product; the preliminary tailings are subjected to tailings treatment by a tailings processing device to obtain a final tailings after treatment. In this mineral processing method, a pre-magnetizer can be selected for use in conjunction with the sorting equipment. Before being fed into the sorting equipment after grading, pre-magnetization is mainly performed on fine-grained minerals with a slurry concentration of 5% to 30%. The slurry after pre-magnetization is then fed into the sorting equipment for sorting. The fine-grained minerals in the slurry can be pre-magnetized and agglomerated, so that most of the fine-grained minerals in the low-concentration slurry are agglomerated into magnetic clusters, and their mass becomes larger. The gravity of the magnetic clusters themselves can overcome the impact of the water in the equipment, reducing the influence of the impact of the water on the movement trajectory of the magnetic clusters, and will not Before sorting, it enters the tailings overflow with the water flow, prolongs the residence time of fine-grained minerals in the equipment sorting area, enables the magnetic group to be sorted by the equipment into the concentrate slurry, reduces the amount of concentrate tailings in the beneficiation process, improves the concentrate yield and recovery rate, reduces the tailings grade, enables the minerals to be efficiently sorted and utilized, and solves the problem that due to the increasingly fine mineral particles being sorted, in many cases, such low-concentration fine-grained minerals are not sorted, but are rushed into the tailings slurry by the impact of the water in the equipment, causing tailings and other problems. At the same time, this beneficiation method is conducive to improving the effective and comprehensive utilization of mineral resources, improving the level of mineral processing technology, optimizing and improving the beneficiation process, and obtaining a new beneficiation method that can both meet the requirements of mineral processing technical indicators and improve the beneficiation efficiency.

[0071] System Example:

[0072] See also Figure 6 , which is a structural block diagram of the mineral processing system provided by the embodiment of the present invention. As shown in the figure, the system includes: a first-stage grinding device 1, a mineral processing device 2, a concentrate processing device 3 and a tailings processing device 4; wherein,

[0073] The first stage grinding device 1 is used to perform a first stage grinding process on the crushed product. Specifically, the crushed product can be fed into the first stage grinding device 1 through the inlet of the first stage grinding device 1 to perform a first stage grinding in the first stage grinding device 1, wherein the first stage grinding device 1 can be a ball mill, and of course can also be other grinding equipment, which is not limited in this embodiment.

[0074] The inlet of the mineral processing equipment 2 is connected to the outlet of the first-stage grinding equipment 1, and is used to receive the product after grinding by the first-stage grinding equipment 1, and gradually classify, pre-magnetize and select the product after grinding to obtain preliminary tailings and preliminary concentrates. Specifically, the product after grinding by the first-stage grinding equipment 1 is fed into the mineral processing equipment 2, and is gradually classified, pre-magnetized and selected in the mineral processing equipment 2. The gradual classification, pre-magnetization and selection can be one stage or multiple stages. In this embodiment, two stages are taken as an example, and classification, pre-magnetization and selection are performed in sequence, and then classification, pre-magnetization and selection are gradually performed again.

[0075] The inlet of the concentrate processing equipment 3 is connected to the concentrate outlet of the mineral processing equipment 2, and is used to receive the preliminary concentrate, and perform concentrate processing on the preliminary concentrate to obtain the final concentrate product. Specifically, the preliminary concentrate finally obtained by the mineral processing equipment 2 is fed into the concentrate processing equipment 3, and the concentrate can be dehydrated after being processed by the concentrate processing equipment 3, for example, to obtain the final concentrate product. Among them, in this embodiment, the concentrate processing equipment 3 can be a concentrate dehydration equipment to perform concentrate dehydration treatment. This embodiment does not limit the treatment method and the number of treatment process stages. It can be a one-stage filtration, filter pressing or precipitation, or it can be a multi-stage treatment such as filtration after concentration or filtration after precipitation, so as to achieve the purpose of concentrate dehydration. In this embodiment, the overflow obtained by the concentrate processing equipment 3 can also be used as circulating water for the entire separation process, and fed to other locations where water needs to be added. In this embodiment, before the preliminary concentrate is fed into the concentrate processing equipment 3, it can be pre-magnetized by a fourth pre-magnetizer (not shown in the figure) and then fed into the concentrate processing equipment 3 for concentrate dehydration treatment, so that the preliminary concentrate can be pre-magnetized and agglomerated before being processed. That is to say, a fourth pre-magnetizer is provided between the inlet of the concentrate processing equipment 3 and the concentrate outlet of the mineral processing equipment 2. The preliminary concentrate is pre-magnetized and agglomerated by the fourth pre-magnetizer, so that the fine-grained minerals in the slurry are agglomerated and enlarged before concentrate processing, so that the magnetized slurry can achieve the effect of concentrate dehydration faster, thereby improving the mineral processing efficiency.

[0076] The inlet of the tailings treatment equipment 4 is respectively connected to the tailings outlet of the mineral processing equipment 2, and is used to perform tailings treatment on the preliminary tailings to obtain the final tailings after the treatment. Specifically, the preliminary tailings obtained in the mineral processing equipment 2 are fed into the tailings treatment equipment 4 for tailings treatment, and the tailings obtained after the treatment by the tailings treatment equipment 4 are the final tailings. Among them, in this embodiment, the tailings treatment equipment 4 can be a tailings dehydration equipment, and the treatment method and the number of treatment process stages are not limited. It can be a one-stage concentration or filter press, or it can be a multi-stage treatment such as filter press after concentration, so as to achieve the purpose of tailings dehydration and facilitate the transportation of tailings to the tailings pond for storage. In this embodiment, before the preliminary tailings are fed into the tailings treatment equipment 4, they can be pre-magnetized by a third pre-magnetizer (not shown in the figure) and then fed into the tailings treatment equipment 4 for tailings treatment, so that they can be pre-magnetized and agglomerated before the preliminary tailings treatment. That is to say, a third pre-magnetizer is provided between the inlet of the tailings treatment equipment 4 and the tailings outlet of the mineral treatment equipment 2. The preliminary tailings are pre-magnetized and agglomerated by the third pre-magnetizer, so that the fine-particle minerals in the slurry are agglomerated and the tailings are treated, so that the magnetized slurry can achieve the effect of tailings dehydration faster, thereby improving the mineral processing efficiency.

[0077] Continue to see Figure 6 The mineral processing equipment 2 includes: a first-stage classification device 21, a first pre-magnetizer 22, a first separation device 23, a second-stage classification device 24, a second pre-magnetizer 25, a second separation device 26 and a second-stage grinding device 27; wherein,

[0078] The inlet of the first stage classification device 21 is connected to the outlet of the first stage grinding device 1, and is used to receive the product after grinding by the first stage grinding device 1, and perform a first stage classification operation on the product after grinding to obtain a coarse-grained product and a fine-grained product after a first stage classification. Specifically, the ground product obtained after a first stage of grinding is fed into the first stage classification device 21 for a first stage classification operation; wherein, the first stage classification device 21 can be a hydrocyclone, or can be other classification equipment, and this embodiment does not impose any restrictions on the first stage classification device. Finally, after a stage of classification, a coarse-grained product and a fine-grained product after a first stage of classification are obtained; wherein, due to different mineral properties, some minerals have a large embedded particle size and can be dissociated without fine grinding; some minerals have a small embedded particle size and need to be ground to be dissociated into monomers; therefore, the coarse-grained product and the fine-grained product can be determined according to the actual situation, such as the properties of the mineral, and the specific classification particle size can be determined. For example, the product greater than the first preset classification particle size is a coarse-grained product after a first stage of classification, and the product less than or equal to the first preset classification particle size is a fine-grained product after a first stage of classification. In this embodiment, the first preset classification particle size is not limited. In this embodiment, the product after crushing is a slurry product containing water, and the coarse-grained product and the fine-grained product after a stage of classification are also slurries.

[0079] In this embodiment, the coarse particle outlet of the first stage classification device 21 is connected to the inlet of the first stage grinding device 1, so as to return the coarse particle product after the first stage classification to the first stage grinding device 1 for re-grinding, and feed the product obtained by re-grinding into the first stage classification device 21, so as to form a closed-loop grinding cycle. Specifically, the coarse particle product obtained after the first stage classification operation is directly returned to the first stage grinding device 1 for re-grinding, so that the first stage classification device 21 and the first stage grinding device 1 form a closed-loop grinding cycle operation, and the minerals in the grinding products obtained after the first stage grinding whose particle size does not meet the first preset classification particle size requirements are circulated in the grinding equipment until the mineral particle size meets the requirements and leaves the circulating grinding process, enters the first stage classification device 21 for a first stage classification operation, and can be used as the fine particle product of the first stage classification operation. Among them, the first preset requirement can be determined according to the actual situation, and it is not limited in this embodiment.

[0080] The inlet of the first pre-magnetizer 22 is connected to the fine particle outlet of the first stage classification device 21, and is used to receive the fine particle product after the first stage classification, and pre-magnetize the fine particle product after the first stage classification to obtain the pre-magnetized and agglomerated ore pulp. Specifically, the fine particle product obtained after the first stage classification operation must be pre-magnetized by the first pre-magnetizer 22 before being fed into the sorting equipment such as the first sorting equipment 23, so that the fine mineral particles in the ore pulp are pre-magnetized and agglomerated; wherein the first pre-magnetizer 22 can be an electromagnetic pre-magnetizer or a permanent magnet pre-magnetizer; the first pre-magnetizer 22 can be a tubular pre-magnetizer or a box-type pre-magnetizer, and this embodiment does not impose any restrictions on the working principle, type, working mode, etc. of the first pre-magnetizer 22.

[0081] The inlet of the first sorting device 23 is connected to the outlet of the first pre-magnetizer 22, and is used to receive the pre-magnetized agglomerated pulp, and perform at least one stage of primary sorting operation on the pre-magnetized agglomerated pulp to obtain a first sorted concentrate product and a first sorted tailings product. Specifically, the pulp obtained after pre-magnetization by the first pre-magnetizer 22 is fed to the first sorting device 23 for primary sorting operation; wherein, the first sorting device 23 is a device for performing at least one stage of sorting operation on the pulp pre-magnetized by the first pre-magnetizer 22, and, during at least one stage of sorting operation, the corresponding concentrate products obtained from each stage of sorting are sequentially fed into the next stage of sorting equipment for subsequent sorting operation until the last stage of sorting operation obtains the mineral that meets the index requirements and completes the primary sorting operation, and the concentrate obtained from the last stage of sorting operation is the concentrate of the primary sorting operation, which serves as the first sorting concentrate product; the primary sorting operation is performed after the mineral that meets the index requirements is obtained, and the concentrate obtained from the last stage of sorting operation is the concentrate of the primary sorting operation, which serves as the first sorting concentrate product; the primary sorting operation is performed after the mineral that meets the index requirements is obtained. The tailings obtained from each stage of the sorting operation are mixed into tailings as the first sorting tailings product; of course, each stage of the sorting operation can also be fed into other equipment for other processing; the sorting method of each stage in the initial sorting operation can be magnetic separation, or it can be gravity separation, flotation, electric separation and other non-magnetic separation methods, that is, the first sorting equipment 23 includes several mineral processing equipment connected in sequence, which can be magnetic separation equipment, or gravity separation equipment, flotation separation equipment, electric separation equipment and other non-magnetic separation equipment. This embodiment does not impose any limitation on the sorting operation method and sorting equipment. In this embodiment, two-stage mineral processing is used as an example: first, the ore pulp pre-magnetized by the first pre-magnetizer 22 is fed into the first stage of mineral processing in the primary separation operation, and the concentrate obtained after the first stage of mineral processing is fed into the second stage of mineral processing for the second stage of separation. The concentrate product after separation meets the requirements of the separation index of this stage, and the concentrate product obtained after the second stage of separation is used as the first separation concentrate product of the primary separation operation. The tailings of the first stage of separation and the second stage of separation are mixed and used as the first separation tailings product of the primary separation operation. Of course, the number of stages of the primary separation operation is not limited to the two-stage separation in this embodiment. The number of mineral processing stages can be one stage, two stages, or multiple stages, as long as the separated products meet the requirements of the technical indicators.

[0082] The inlet of the second-stage classification device 24 is connected to the concentrate outlet of the first selection device 23, and is used to receive the first selected concentrate product, and perform a second-stage classification operation on the first selected concentrate product to obtain a coarse-grained product and a fine-grained product after the second-stage classification. Specifically, the first selected concentrate product obtained by the initial selection operation is fed into the second-stage classification device 24 for second-stage classification; wherein the second-stage classification device 24 can be a hydrocyclone or other classification equipment, which is not limited in this embodiment. After two-stage classification, coarse-grained products and fine-grained products after two-stage classification are obtained; among them, due to different mineral properties, some minerals have large embedded particle sizes and can be dissociated without fine grinding; some minerals have small embedded particle sizes and need to be finely ground to be dissociated into monomers; therefore, the coarse-grained products and fine-grained products can be specifically defined according to actual conditions, such as the properties of the minerals. For example, the product greater than the second preset classification particle size is the coarse-grained product after two-stage classification, and the product less than or equal to the first preset classification particle size is the fine-grained product after two-stage classification. In this embodiment, no limitation is imposed on the second preset classification particle size, that is, after two-stage classification, minerals that meet the particle size requirements, such as minerals that are less than or equal to the second preset classification particle size, are used as fine-grained products, and minerals that do not meet the particle size requirements, such as minerals that are greater than the first preset classification particle size, are used as coarse-grained products.

[0083] The inlet of the second-stage grinding device 27 is connected to the coarse-grained outlet of the second-stage classification device 24, and is used to receive the coarse-grained product after the second-stage classification and grind the coarse-grained product after the second-stage classification; the inlet of the second-stage classification device 24 is also connected to the outlet of the second-stage grinding device 27, and is used to return the product after the second-stage grinding to the second-stage classification device 24 for classification, so that the second-stage grinding device 27 and the second-stage classification device 24 form a grinding and classification closed-loop circulation process. Specifically, the coarse-grained product after the second-stage classification is fed into the second-stage grinding device 27 for second-stage grinding, that is, grinding again, until the product meets the particle size requirements, and is returned to the second-stage classification device 24 for classification as a fine-grained product after the second-stage classification.

[0084] The inlet of the second pre-magnetizer 25 is connected to the fine particle outlet of the second-stage classification device 24, and is used to receive the fine particle product after the second-stage classification, and pre-magnetize the fine particle product after the second-stage classification to obtain the re-magnetized and agglomerated slurry. Specifically, the fine particle product obtained after the second-stage classification must be pre-magnetized by the second pre-magnetizer 25 before being fed into the sorting equipment such as the second sorting equipment 26, so that the fine mineral particles in the slurry are pre-magnetized and agglomerated; wherein the second pre-magnetizer 25 can be an electromagnetic pre-magnetizer or a permanent magnet pre-magnetizer; the second pre-magnetizer 25 can be a tubular pre-magnetizer or a box-type pre-magnetizer, and this embodiment does not impose any restrictions on the working principle, type, working mode, etc. of the second pre-magnetizer 25.

[0085] The inlet of the second sorting device 26 is connected to the outlet of the second pre-magnetizer 25, and is used to receive the re-magnetized and agglomerated pulp. The re-magnetized and agglomerated pulp is subjected to at least one stage of re-sorting operation to obtain a second sorted concentrate product and a second sorted tailings product. The second sorted concentrate product is fed to the concentrate processing equipment 3 as a preliminary concentrate, and the second sorted tailings product and the first sorted tailings product are fed to the tailings processing equipment 4 as preliminary tailings. Specifically, the pulp obtained after pre-magnetization by the second pre-magnetizer 25 is fed to the second sorting device 26 for re-sorting operation; wherein, the second sorting device 26 is a device for performing at least one stage of sorting operation on the pulp pre-magnetized by the second pre-magnetizer 25, and, during at least one stage of sorting operation, the corresponding concentrate products obtained from each stage of sorting are sequentially fed to the next stage of sorting equipment for the subsequent sorting operation until the last stage of sorting operation obtains the mineral that meets the index requirements and the re-sorting operation is completed. The concentrate obtained from the last stage of sorting operation is the concentrate of the re-sorting operation. As the second sorting concentrate product; the tailings obtained from each stage of the sorting operation in the second sorting operation are mixed as tailings, as the second sorting tailings product; the sorting method of each stage in the second sorting operation can be magnetic separation, or it can be gravity separation, flotation, electric separation and other non-magnetic separation methods, that is, the second sorting equipment 26 includes a number of mineral processing equipment connected in sequence, and the mineral processing equipment can be magnetic separation equipment, or it can be gravity separation equipment, flotation separation equipment, electric separation equipment and other non-magnetic separation equipment. This embodiment does not impose any limitation on the sorting operation method and sorting equipment. In this embodiment, two-stage mineral processing is used as an example: first, the ore pulp pre-magnetized by the second pre-magnetizer 25 is fed into the first stage of mineral processing in the secondary selection operation, and the concentrate obtained after the first stage of mineral processing is fed into the second stage of mineral processing for the second stage of selection. The concentrate product after the selection meets the selection index requirements of this stage, and the concentrate product obtained after the second stage of selection is used as the second selected concentrate product of the secondary selection operation. The tailings of the first stage and the second stage of selection are mixed and used as the second selected tailings product of the secondary selection operation. Of course, the number of stages of the secondary selection operation is not limited to the two-stage selection in this embodiment. The number of mineral processing stages can be one stage, two stages, or multiple stages, as long as the selected products meet the technical index requirements.

[0086] In other embodiments, the mineral processing equipment 2 may also include a stage of classification equipment 21, a first pre-magnetizer 22, and a first screening equipment 23, that is, a stage of classification, pre-magnetization and screening is formed, and the first screening concentrate product and the first screening tailings product obtained by the first screening equipment 23 are used as preliminary tailings and preliminary concentrates respectively. It may also be multi-stage, for example Figure 6 In the embodiment shown, two stages are taken as an example, the tailings obtained in each stage are fed into the tailings treatment equipment as preliminary tailings, and the concentrate obtained in the last stage is fed into the concentrate treatment equipment as preliminary concentrate.

[0087] In this embodiment, the selection is stage grinding, and the number of grinding stages is not limited to two-stage grinding in this embodiment. The number of grinding stages can be one stage, two stages, or multiple stages, as long as the grinding product reaches the dissociation of mineral particle monomers.

[0088] In this embodiment, the pre-magnetizer can be used to pre-magnetize fine-grained minerals with a slurry concentration between 5% and 30%.

[0089] In this embodiment, the mineral processing system is not limited to the grinding and screening series process in this embodiment. For complex mineral processing processes, it is sufficient to set a pre-magnetizer after grinding and classification before entering the mineral processing equipment.

[0090] In summary, the mineral processing system provided in this embodiment, after the crushed product is subjected to stage grinding by a grinding device 1, the grinding product is gradually graded, pre-magnetized and sorted by a mineral processing device 2 to obtain preliminary tailings and preliminary concentrates; the preliminary concentrate is subjected to concentrate treatment by a concentrate processing device 3 to obtain a final concentrate product; the preliminary tailings are subjected to tailings treatment by a tailings processing device 4 to obtain a final tailings after treatment. In this mineral processing system, a pre-magnetizer can be selected for use in conjunction with the sorting equipment. Before being fed into the sorting equipment after grading, pre-magnetization is mainly performed on fine-grained minerals with a pulp concentration of 5% to 30%. The pre-magnetized pulp is then fed into the sorting equipment for sorting. The fine-grained minerals in the pulp can be pre-magnetized and agglomerated, so that most of the fine-grained minerals in the low-concentration pulp are agglomerated into magnetic clusters, and their mass becomes larger. The gravity of the magnetic clusters themselves can overcome the impact of the water in the equipment, reducing the influence of the impact of the water on the movement trajectory of the magnetic clusters, and will not Before sorting, it will flow into the tailings overflow with the water flow, prolonging the residence time of fine-grained minerals in the equipment sorting area, so that the magnetic group can be sorted into the concentrate slurry by the equipment, reducing the amount of concentrate tailings in the beneficiation process, improving the concentrate yield and recovery rate, reducing the tailings grade, and enabling the minerals to be efficiently sorted and utilized, solving the problem that due to the increasingly fine mineral particles being sorted, in many cases, such low-concentration fine-grained minerals are not sorted, but are rushed into the tailings slurry by the impact of the water in the equipment, causing tailings and other problems. At the same time, the beneficiation system is conducive to improving the effective and comprehensive utilization of mineral resources, improving the level of mineral processing technology, optimizing and improving the sorting process, and obtaining a new sorting system that can not only meet the requirements of mineral processing technical indicators, but also improve sorting efficiency.

[0091] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0092] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A mineral processing method, characterized in that: The steps include: Grinding step: feeding the crushed product into a grinding equipment for a grinding step; The mineral processing step is to feed the product after the first grinding equipment into the mineral processing equipment for gradual classification, pre-magnetization and separation to obtain preliminary tailings and preliminary concentrates; A concentrate processing step, wherein the preliminary concentrate is fed into a concentrate processing device for concentrate processing to obtain a final concentrate product; A tailings treatment step, wherein the preliminary tailings are fed into a tailings treatment device for tailings treatment to obtain final tailings after treatment; The mineral processing step includes the following sub-steps: The grinding and classification sub-step feeds the ground product into a classification device for a classification operation to obtain a coarse-grained product and a fine-grained product after a classification; The preliminary pre-magnetization sub-step is to feed the fine-grained product obtained after the first stage of classification into the first pre-magnetizer for pre-magnetization to obtain pre-magnetized agglomerated ore pulp; The primary separation sub-step is to feed the ore pulp that has been pre-magnetized and agglomerated by the first pre-magnetizer into the first separation equipment for at least one stage of primary separation operation to obtain a first separation concentrate product and a first separation tailings product; a second classification sub-step, feeding the first selected concentrate product into a second-stage classification device for second-stage classification to obtain a coarse-grained product and a fine-grained product after second-stage classification; The second pre-magnetization sub-step is to feed the fine-grained product after the second stage classification into the second pre-magnetizer for pre-magnetization operation to obtain the re-magnetized agglomerated slurry; In the re-selection sub-step, the slurry that has been pre-magnetized and agglomerated by the second pre-magnetizer is fed into the second selection equipment for at least one stage of re-selection operation to obtain a second selected concentrate product and a second selected tailings product. The second selected concentrate product is fed to the concentrate processing equipment as a preliminary concentrate, and the second selected tailings product and the first selected tailings product are fed to the tailings processing equipment as preliminary tailings.

2. The ore dressing method according to claim 1, characterized in that: The mineral processing step also includes the following sub-steps: In the coarse-grained grinding sub-step, the coarse-grained product after the first stage of classification is returned to the first stage of grinding equipment for re-grinding, and the product obtained by the re-grinding is fed into the first stage of classification equipment to form a closed-circuit grinding cycle.

3. The ore dressing method according to claim 1, characterized in that: The mineral processing step also includes the following sub-steps: In the re-grinding sub-step, the coarse-grained product after the second stage classification is fed into the second stage grinding equipment for second stage grinding, and the product after the second stage grinding is returned to the second stage classification equipment for classification. The second stage grinding and second stage classification form a closed-loop circulation process of grinding and classification.

4. The ore dressing method according to any one of claims 1 to 3, characterized in that: In the tailings treatment step, before the preliminary tailings are fed into the tailings treatment equipment, they are pre-magnetized by a third pre-magnetizer and then fed into the tailings treatment equipment for tailings treatment; and / or, In the concentrate processing step, before the preliminary concentrate is fed into the concentrate processing equipment, it is pre-magnetized by a fourth pre-magnetizer and then fed into the concentrate processing equipment for concentrate processing.

5. A mineral processing system, characterized in that: include: First stage grinding equipment, mineral processing equipment, concentrate processing equipment and tailings processing equipment; among which, The first stage grinding equipment is used to perform a first stage grinding process on the crushed product; The inlet of the mineral processing equipment is connected to the outlet of the first-stage grinding equipment, and is used to receive the product after grinding by the first-stage grinding equipment, and gradually classify, pre-magnetize and select the product after grinding to obtain preliminary tailings and preliminary concentrates; The inlet of the concentrate processing equipment is connected to the concentrate outlet of the mineral processing equipment, and is used to receive the preliminary concentrate and perform concentrate processing on the preliminary concentrate to obtain a final concentrate product; The inlet of the tailings treatment equipment is respectively connected to the tailings outlet of the mineral processing equipment, and is used to perform tailings treatment on the preliminary tailings to obtain final tailings after treatment; The mineral processing equipment includes: a first-stage classification device, a first pre-magnetizer, a first separation device, a second-stage classification device, a second pre-magnetizer, and a second separation device; wherein, The inlet of the first stage classification device is connected to the outlet of the first stage grinding device, and is used to receive the product after grinding by the first stage grinding device, and perform a first stage classification operation on the product after grinding to obtain a first stage classified coarse particle product and a fine particle product; The inlet of the first pre-magnetizer is connected to the fine particle outlet of the first stage classification device, and is used to receive the fine particle product after the first stage classification, and pre-magnetize the fine particle product after the first stage classification to obtain pre-magnetized agglomerated ore pulp; The inlet of the first separation device is connected to the outlet of the first pre-magnetizer, and is used to receive the pre-magnetized agglomerated slurry, and perform at least one stage of primary separation operation on the pre-magnetized agglomerated slurry to obtain a first separation concentrate product and a first separation tailings product; The inlet of the second-stage classification device is connected to the concentrate outlet of the first separation device, and is used to receive the first separation concentrate product and perform a second-stage classification operation on the first separation concentrate product to obtain a coarse-grained product and a fine-grained product after the second-stage classification; The inlet of the second pre-magnetizer is connected to the fine particle outlet of the second-stage classification device, and is used to receive the fine particle product after the second-stage classification, and perform pre-magnetization operation on the fine particle product after the second-stage classification to obtain the re-magnetized agglomerated slurry; The inlet of the second separation equipment is connected to the outlet of the second pre-magnetizer, and is used to receive the re-magnetized agglomerated pulp, and the re-magnetized agglomerated pulp is subjected to at least one stage of re-separation operation to obtain a second separation concentrate product and a second separation tailings product, and the second separation concentrate product is fed to the concentrate processing equipment as a preliminary concentrate, and the second separation tailings product and the first separation tailings product are fed to the tailings processing equipment as preliminary tailings; The coarse particle outlet of the first stage classification device is connected to the inlet of the first stage grinding device, so as to return the coarse particle product after the first stage classification to the first stage grinding device for re-grinding, and feed the product obtained by re-grinding into the first stage classification device, so as to form a closed-circuit grinding cycle; The mineral processing equipment also includes: a second-stage grinding equipment; wherein, The inlet of the second-stage grinding equipment is connected to the coarse-grained outlet of the second-stage classification equipment, and is used to receive the coarse-grained product after the second-stage classification and grind the coarse-grained product after the second-stage classification; The inlet of the second-stage classification equipment is also connected to the outlet of the second-stage grinding equipment, so as to return the product after the second-stage grinding to the second-stage classification equipment for classification, so that the second-stage grinding equipment and the second-stage classification equipment form a closed-loop circulation process of grinding and classification.

6. The ore dressing system according to claim 5, characterized in that: A third pre-magnetizer is connected to the inlet of the tailings treatment equipment, which is used to pre-magnetize the preliminary tailings and feed the pre-magnetized preliminary tailings into the tailings treatment equipment for tailings treatment; and / or, A fourth pre-magnetizer is connected to the inlet of the concentrate processing equipment for pre-magnetizing the preliminary concentrate and feeding the pre-magnetized preliminary concentrate into the concentrate processing equipment for concentrate processing.

Images