Ore pulp desliming and desilting beneficiation method and system based on lithium ore

Abstract

The invention provides an ore pulp desliming and desilting beneficiation method and system based on lithium ore. The method comprises the following steps that ore pulp is subjected to ore grinding and grading treatment, and an ore grinding and grading overflow product is obtained; sequentially carrying out multiple times of desliming and desilting operations on the ore grinding and grading overflow products through the hydraulic hydrocyclones for multi-stage desliming, so as to obtain silt tail slurry products and underflow ore slurry products discharged by the hydraulic hydrocyclones for desliming at all stages; and carrying out tailing treatment on the sediment tail slurry product. According to the multistage desliming hydrocyclone, under the multiple centrifugal effects, the purposes of desliming, desilting and beneficiation of ore pulp are achieved in a grading mode, desliming, desilting, stable product quality and large output yield can be achieved in a grading mode, meanwhile, the desliming and desilting quality of the ore pulp after grading can be guaranteed, and on the premise that the beneficiation quality of the ore pulp is guaranteed, the beneficiation quality of the ore pulp is guaranteed. The production goals of high efficiency, energy conservation and environmental protection are achieved, and the explosion risk and the blocking risk of a conveying pipeline and a self-flowing pipeline in the sedimentation process of mineral particles in the high-concentration ore pulp are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of smelting engineering. Specifically, it relates to a beneficiation method for pulp de-sludging and sand sedimentation based on lithium ore. Background Art

[0002] In the context of the global renewable energy transformation, lithium resources, as key raw materials in fields such as new energy vehicles and energy storage systems, play a crucial role in achieving sustainable development goals. Beryllium metal is known as the "super metal" and "advanced metal". Due to its special physical and chemical properties, it is widely used in high-precision and advanced fields such as the nuclear industry and aerospace, and is an irreplaceable key material for the development of future high-tech fields.

[0003] Currently, during the beneficiation process of lithium ore, the quality of pulp de-sludging and sand sedimentation is poor. After the operation, the content of ore in the tailing pulp is large and the quality of the pulp is poor. In particular, in areas with high altitude, cold climate, large temperature difference between day and night, low oxygen content, and low air pressure, it hinders the operation of equipment, especially the flow rate, further resulting in poor quality of pulp de-sludging and sand sedimentation. Summary of the Invention

[0004] In view of this, the present invention proposes a beneficiation method and system for pulp de-sludging and sand sedimentation based on lithium ore, aiming to solve the problem that the poor quality of existing pulp de-sludging and sand sedimentation leads to a large content of ore in the tailing pulp obtained after the operation and poor quality of the pulp.

[0005] On the one hand, the present invention proposes a beneficiation method for pulp de-sludging and sand sedimentation based on lithium ore. The method includes the following steps: a grinding and classification step of performing grinding and classification treatment on the pulp to obtain a grinding and classification overflow product; a multiple de-sludging step of sequentially performing multiple de-sludging and sand sedimentation operations on the grinding and classification overflow product through a multi-stage de-sludging hydrocyclone to obtain a sediment tailing pulp product and underflow pulp products discharged from each stage of the de-sludging hydrocyclone; and a tailing treatment step of treating the sediment tailing pulp product.

[0006] Further, in the above beneficiation method for pulp de-sludging and sand sedimentation based on lithium ore, the multiple de-sludging step includes: a primary de-sludging sub-step of feeding the grinding and classification overflow product into a first hydrocyclone, overflowing to obtain a primary sediment slurry product, and discharging the underflow to obtain a primary pulp product; a secondary de-sludging sub-step of feeding the primary sediment slurry product into a second hydrocyclone, overflowing to obtain a secondary sediment slurry product, and discharging the underflow to obtain a secondary pulp product; a tertiary de-sludging sub-step of feeding the secondary sediment slurry product into a third hydrocyclone, overflowing to obtain a tertiary sediment slurry product as the sediment tailing pulp product, and discharging the underflow to obtain a tertiary pulp product; the primary pulp product, the secondary pulp product, and the tertiary pulp product are all used as underflow pulp products.

[0007] Further, in the above-mentioned ore pulp desliming and sand settling beneficiation method based on lithium ore, the first hydrocyclone, the second hydrocyclone and / or the third hydrocyclone are based on a centrifugal force field, and the fed product forms a rotational motion in the hydrocyclone, so that the heavier ore particles are discharged as the underflow product, and the lighter sediment particles overflow as the overflow product.

[0008] Further, in the above-mentioned ore pulp desliming and sand settling beneficiation method based on lithium ore, the method further includes the following steps: a flotation dehydration step, in which the underflow pulp products of each stage of the desliming hydrocyclone are subjected to a flotation operation to obtain a lithium pulp, a beryllium pulp and a flotation tailing pulp, and the lithium pulp and the beryllium pulp are respectively subjected to a dehydration operation to obtain lithium concentrate and beryllium concentrate.

[0009] Further, in the above-mentioned ore pulp desliming and sand settling beneficiation method based on lithium ore, during the process of successively performing multiple desliming and sand settling operations on the grinding and classification overflow product by a multi-stage desliming hydrocyclone, the grinding and classification overflow product is fed into the primary desliming pulp tank and pumped into the primary desliming hydrocyclone by a slurry pump; the deslimed slurry product obtained by performing the desliming and sand settling operation on the upper-stage desliming hydrocyclone is fed into the desliming pulp tank corresponding to the lower-stage desliming hydrocyclone and pumped into the lower-stage desliming hydrocyclone by a slurry pump.

[0010] On the other hand, the present invention also provides an ore pulp desliming and sand settling beneficiation system based on lithium ore, which system includes: a grinding and classification module for performing grinding and classification treatment on the ore pulp to obtain a grinding and classification overflow product; a multiple desliming module for successively performing multiple desliming and sand settling operations on the grinding and classification overflow product by a multi-stage desliming hydrocyclone to obtain a sediment tailing pulp product and the underflow pulp products discharged from each stage of the desliming hydrocyclone; and a tailing treatment module for performing tailing treatment on the sediment tailing pulp product.

[0011] Further, in the above-mentioned ore pulp desliming and sand settling beneficiation system based on lithium ore, the multiple desliming module includes: a primary desliming sub-module for feeding the grinding and classification overflow product into a first hydrocyclone, overflowing to obtain a primary sediment slurry product, and discharging the underflow to obtain a primary pulp product; a secondary desliming sub-module for feeding the primary sediment slurry product into a second hydrocyclone, overflowing to obtain a secondary sediment slurry product, and discharging the underflow to obtain a secondary pulp product; and a tertiary desliming sub-module for feeding the secondary sediment slurry product into a third hydrocyclone, overflowing to obtain a tertiary sediment slurry product, and discharging the underflow to obtain a tertiary pulp product.

[0012] Further, in the above-mentioned ore pulp de-sludging and sand-settling beneficiation system based on lithium ore, the first hydrocyclone, the second hydrocyclone, and / or the third hydrocyclone are based on a centrifugal force field, and the fed product forms a rotational movement inside the hydrocyclone, so that the heavier ore particles are discharged as underflow products, and the lighter sediment particles overflow as overflow products.

[0013] Further, in the above-mentioned ore pulp de-sludging and sand-settling beneficiation system based on lithium ore, the system further includes: a flotation dehydration module, which is used to perform flotation operations on the underflow ore pulp products of each stage of the de-sludging hydrocyclones to obtain lithium ore pulp, beryllium ore pulp, and flotation tailing ore pulp, and perform dehydration operations on the lithium ore pulp and beryllium ore pulp respectively to obtain lithium concentrate and beryllium concentrate.

[0014] Further, in the above-mentioned ore pulp de-sludging and sand-settling beneficiation system based on lithium ore, the multiple de-sludging module is further used to feed the grinding classification overflow product into the primary de-sludging ore pulp tank, and pump it into the primary de-sludging hydrocyclone through a slurry pump; feed the de-sludged slurry product obtained from the de-sludging and sand-settling operation of the upper-stage de-sludging hydrocyclone into the corresponding de-sludging ore pulp tank of the lower-stage de-sludging hydrocyclone, and pump it into the lower-stage de-sludging hydrocyclone through a slurry pump.

[0015] The ore pulp de-sludging and sand-settling beneficiation method and system based on lithium ore provided by the present invention achieve the purpose of ore pulp de-sludging and sand-settling beneficiation through multiple stages of de-sludging hydrocyclones under multiple centrifugal actions, that is, de-sludging and sand-settling are performed again on the basis of each classification. It can achieve de-sludging and sand-settling by classification, with stable product quality and large output. At the same time, it can also ensure the quality of ore pulp de-sludging and sand-settling after classification. On the premise of ensuring the quality of ore pulp beneficiation, it realizes the production goals of high efficiency, energy conservation, and environmental protection, and avoids the explosion risk and the risks of blockage of the conveying pipeline and the gravity flow pipeline during the sedimentation process of mineral particles in the high-concentration ore pulp, and solves the problem that the content of ore in the tailing pulp obtained after the operation is large and the quality of the ore pulp is poor due to the poor quality of the existing ore pulp de-sludging and sand-settling. It has created a precedent for the ore pulp de-sludging and sand-settling beneficiation of lithium ore in plateau and alpine regions. In particular, it creates greater economic and social benefits for mining enterprises at an altitude of 4,600 meters and promotes the sustainable green development of the lithium mining industry. At the same time, the classification cyclone can realize continuous cyclic de-sludging and sand-settling operations, and the classification cyclone is efficient, energy-saving, and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0017] Figure 1Flow chart of the ore pulp de - sludging and sand - settling beneficiation method based on lithium ore provided by an embodiment of the present invention;

[0018] Figure 2 Process flow chart of the ore pulp de - sludging and sand - settling beneficiation method based on lithium ore provided by an embodiment of the present invention;

[0019] Figure 3 Another flow chart of the ore pulp de - sludging and sand - settling beneficiation method based on lithium ore provided by an embodiment of the present invention;

[0020] Figure 4 Flow chart of the grinding and classification step provided by an embodiment of the present invention;

[0021] Figure 5 Process flow chart of the grinding and classification step provided by an embodiment of the present invention;

[0022] Figure 6 Flow chart of the multiple de - sludging step provided by an embodiment of the present invention;

[0023] Figure 7 Structure block diagram of the ore pulp de - sludging and sand - settling beneficiation system based on lithium ore provided by an embodiment of the present invention;

[0024] Figure 8 Structure block diagram of the grinding and classification module provided by an embodiment of the present invention;

[0025] Figure 9 Structure block diagram of the multiple de - sludging module provided by an embodiment of the present invention. Detailed implementation mode

[0026] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the 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 so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. Hereinafter, the present invention will be described in detail with reference to the drawings and in combination with the embodiments.

[0027] Method embodiment:

[0028] See Figures 1 to 2 , which shows the flow chart of the ore pulp de - sludging and sand - settling beneficiation method based on lithium ore provided by an embodiment of the present invention. As shown in the figure, the beneficiation method includes the following steps:

[0029] Grinding and classification step S1: performing grinding and classification on lithium ore to obtain the overflow product of grinding and classification.

[0030] Specifically, the lithium ore can be subjected to grinding and classification treatment by the grinding and classification equipment 100 to obtain the grinding and classification overflow product.

[0031] Multiple de-sliming steps S2: The grinding and classification overflow product is successively subjected to multiple de-sliming and sedimentation operations by a multi-stage de-sliming hydrocyclone to obtain the sediment tailings slurry product and the underflow pulp products discharged from each stage of the de-sliming hydrocyclone.

[0032] Specifically, the grinding and classification overflow product is successively subjected to multiple de-sliming and sedimentation operations by a multi-stage de-sliming hydrocyclone to obtain the final overflow product, i.e., the sediment tailings slurry product, and the underflow pulp products discharged from each stage of the de-sliming hydrocyclone. Among them, a de-sliming pulp pool is correspondingly provided upstream of each de-sliming hydrocyclone; the grinding and classification overflow product can be fed into the primary de-sliming pulp pool and pumped into the primary de-sliming hydrocyclone by a slurry pump; and the de-slime slurry product obtained by the de-sliming and sedimentation operation of the upstream de-sliming hydrocyclone is fed into the de-sliming pulp pool corresponding to the downstream de-sliming hydrocyclone and pumped into the downstream de-sliming hydrocyclone by a slurry pump.

[0033] Tailings treatment step S3: The sediment tailings slurry product is subjected to tailings treatment.

[0034] Specifically, the final overflow product, that is, the sediment tailings slurry product obtained by multiple de-sliming overflows, enters the tailings pulp pool 222 through the tail-stage floating flow pipeline 220. At the same time, tailings from other processes, such as the flotation tailings pulp of the flotation operation, can also be the tailings from other process operations and are fed into the tailings pulp pool 222 through the tailings gravity flow pipeline 226; the tailings pulp product in the tailings pulp pool 222 can enter the fourth slurry pump pre-pipeline 223 and then enter the fourth slurry pump 224. After being pressurized by the fourth slurry pump 224, the pulp is pumped by the fourth slurry pump pressure pipeline 225 to other equipment, such as a professional tailings thickener, for the next operation. In this embodiment, no limitation is made on the subsequent operations.

[0035] See Figure 3 , which is another process flow block diagram of the ore pulp de-sliming and sedimentation beneficiation method based on lithium ore provided by the embodiment of the present invention. As shown in the figure, the beneficiation method may further include the following steps:

[0036] Grinding and classification step S1: The lithium ore is subjected to grinding and classification treatment to obtain the grinding and classification overflow product.

[0037] Multiple de-sliming steps S2: The grinding and classification overflow product is successively subjected to multiple de-sliming and sedimentation operations by a multi-stage de-sliming hydrocyclone to obtain the sediment tailings slurry product and the underflow pulp products discharged from each stage of the de-sliming hydrocyclone.

[0038] Tailings treatment step S3: The sediment tailings slurry product is subjected to tailings treatment.

[0039] Flotation and dehydration step S4: subject the underflow pulp products of the hydrocyclones for desliming water at each level to flotation operations to obtain lithium pulp, beryllium pulp, and flotation tailing pulp, and perform dehydration operations on the lithium pulp and beryllium pulp respectively to obtain lithium concentrate and beryllium concentrate.

[0040] Specifically, the underflow pulp products of the hydrocyclones at each level, i.e., the desliming underflow sand products, are fed by gravity into a flotation device. For example, they can be fed into the rough lithium flotation agitation tank 300 of the flotation device, or it can also be other agitation tanks or other devices. The next operation, namely the flotation operation, can be carried out. The ground ore can be made into a pulp with a suitable concentration by adjusting the pulp and adding drugs and heating in the agitation tank, and the corresponding flotation reagents are added. Stirring is carried out through the stirring and aerating device of the flotation machine, and air is inhaled to generate a large number of bubbles with appropriate sizes and relatively stable. After the pulp acts with the flotation agent, the surface-hydrophobic ore particles can adhere to the bubbles and gradually float to the surface of the pulp to form mineralized foam. The rotating scraper of the flotation machine scrapes off the mineralized foam to obtain the corresponding lithium pulp and beryllium pulp. The product that remains in the pulp and is then discharged is the flotation tailing pulp, which can be discharged into the tailing pulp pond 228. Among them, the lithium pulp and beryllium pulp can be obtained through lithium separation and beryllium separation. Then, dehydration operations are performed on the lithium pulp and beryllium pulp respectively to obtain lithium concentrate and beryllium concentrate.

[0041] See Figure 4 and Figure 5 which shows the preferred process flow of the grinding and classification step provided by the embodiment of the present invention. As shown in the figure, the grinding and classification step S1 can include the following sub-steps:

[0042] Grinding and screening step S11: subject the lithium ore to grinding and screening operations to obtain intermediate ore and divide it into two paths, A and B.

[0043] Specifically, first, the lithium ore can be subjected to grinding and screening operations through a crushing and screening device (not shown in the figure) to obtain intermediate ore. Then, the intermediate ore is divided into two paths, A and B, to perform heavy medium separation and ball mill grinding operations respectively.

[0044] Screening operation step S12: feed the intermediate ore and water in path A into a heavy medium sizing screen for screening operations to obtain small particle pulp under the screen and large particle products on the screen. The large particle products on the screen are subjected to heavy medium separation operations to obtain magnetic tailing pulp products.

[0045] Specifically, first, the middlings in Route A can be fed into the heavy medium sizing screen 102, i.e., the sizing screen before heavy medium separation, by the first conveyor 101 in accordance with the quantity. Water is injected into the heavy medium sizing screen 102 through the water injection pipe 103 to mix and screen the water with the middlings fed by the first conveyor 101, obtaining the undersize fine particle pulp and the oversize large particle product; then, the oversize large particle product is fed into the heavy medium treatment system by the second conveyor 117. It can be first fed into the mixing tank before the rough selection of heavy medium separation for mixing operation with the added ferrosilicon powder, and then heavy medium separation operation is carried out. For example, the heavy medium mixture can be subjected to classification and medium removal screening operations in sequence to obtain concentrate pulp, medium removal screen underflow water and medium. The medium removal screen underflow water and medium are recycled and concentrated, and then magnetic separation is carried out by the magnetic separator 118 to obtain magnetic tailing pulp products and recover ferrosilicon powder water products. The recovered ferrosilicon powder water products are fed into the mixing tank for recycling. Among them, the oversize large particle product can be the oversize product with a size of 0.5 - 6 mm, and the undersize fine particle pulp can be the mixed pulp of the undersize product with a size of less than 0.5 mm and water; the heavy medium sizing screen 102 can be a 4.3 m × 7.3 m vibrating screen.

[0046] Mixing operation step S13: Feed the undersize fine particle pulp and the magnetic tailing pulp products into the thickening pump sump to obtain the mixed slurry before thickening.

[0047] Specifically, the undersize fine particle pulp and the magnetic tailing pulp products can be fed into the thickening pump sump 105. The undersize fine particle pulp and the heavy medium concentrate products are mixed in the thickening pump sump 105 to obtain the mixed slurry before thickening. Among them, the undersize fine particle pulp can flow into the thickening pump sump 105 through the screening self-flow pipeline 104.

[0048] Thickening operation step S14: Feed the mixed slurry before thickening in the thickening pump sump into the thickener for thickening operation to obtain the thickened pulp product, and feed it into the classification hydrocyclone pump sump.

[0049] Specifically, first, the mixed slurry before thickening in the thickening pump sump 105 can be pumped to the thickener 107 through the slurry pump pipeline 106 for thickening operation. The underflow product obtained is the thickened pulp product; then, the underflow of the thickener 107 is pumped to the mill discharge pump sump in the grinding and flotation workshop, i.e., the classification hydrocyclone pump sump 109, by the slurry pump 108. Among them, the thickener 107 can be a fine particle thickener.

[0050] Grinding operation step S15: Feed the middlings in Route B into the grinding mill for grinding operation to obtain the grinding product, and feed it into the classification hydrocyclone pump sump to mix with the thickened pulp product to obtain the grinding slurry.

[0051] Specifically, 3 hydraulic flat gate valves are arranged under the pre-grinding buffer bin to feed the middlings in line B to the third conveyor 113, and then through the third conveyor 113 to the grinding mill 111 in the grinding and beneficiation workshop. In this embodiment, a weighing device is provided on the third conveyor 113, which has metering, accumulation, and control methods. The feeding amount to the grinding mill 111 is measured by adjusting the rotation speed (frequency conversion) of the third conveyor 113 and through an electronic belt scale, and the feeding is quantitatively controlled according to production requirements. Among them, the grinding mill 111 can be a wet overflow ball mill, especially a wet overflow Φ5.8m×10.4m ball mill.

[0052] The classification operation step S16: The grinding pulp in the classification hydrocyclone pump sump is transported to the classification hydrocyclone for classification operation. After the classification operation, a classification overflow product and a classification underflow product are obtained. The classification underflow product is fed into the grinding mill for grinding operation to obtain a grinding product, which is then fed into the classification hydrocyclone pump sump to be fed again and transported to the classification hydrocyclone for classification operation, forming a closed-circuit grinding cycle operation.

[0053] Specifically, the feeding concentration of the classification hydrocyclone 114, the overflow concentration and overflow flow rate of the overflow pipeline 115 are detected online; by adjusting the makeup water in the classification hydrocyclone pump sump 109, the feeding concentration of the classification hydrocyclone 114 is stabilized. The liquid level in the classification hydrocyclone pump sump 109 and the feeding flow rate on the slurry pump delivery pipeline 116 are stabilized by the frequency conversion of the slurry pump. The cyclone pressure is adjusted by the automatic opening and closing of the classification hydrocyclone 114, so that the concentration and fineness of the overflow product in the overflow pipeline 115 meet the production requirements; the grinding mill 111 used in the grinding and beneficiation workshop can use 1 wet overflow Φ5.8m×10.4m ball mill for grinding operation. The grinding product obtained by grinding in the grinding mill 111 enters the classification hydrocyclone pump sump 109 and is pumped by the slurry pump delivery pipeline 116 to the classification hydrocyclone 114 for classification operation; among them, the classification hydrocyclone 114 can be a group of Φ500-12 hydrocyclones. The underflow product of the classification hydrocyclone 114 enters the grinding mill 111 from the classification flow through the pipeline 119; while the grinding mill 111 is rotating, the middlings at the feeding end continuously enter the grinding mill 111 through the third conveyor 113, and the discharging end continuously discharges ore to the classification hydrocyclone pump sump 109, which is pumped by the slurry pump delivery pipeline 116 to the classification hydrocyclone 114 for classification operation; the classification overflow product of the classification hydrocyclone 114 can be ore smaller than 0.074mm, and its content is about 79%, which is transported through the overflow pipeline 115 to the pulp de-sludging and sand-settling ore dressing system 200, especially fed into the first-stage de-sludging hydrocyclone.

[0054] Among them, the first conveyor, the second conveyor, and / or the third conveyor is a belt conveyor.

[0055] See Figure 6 , which is the process flow of the multiple de-sludging steps provided by the embodiments of the present invention. As Figure 1 and Figure 6 shown, the multiple de-sludging step S2 may include the following sub-steps:

[0056] Primary de-sludging sub-step S21, feeding the grinding classification overflow product into the first hydrocyclone, obtaining a primary sediment slurry product by overflow, and discharging the underflow to obtain a primary pulp product.

[0057] Specifically, the classification overflow product discharged by the classification hydrocyclone 114 is fed into the first-stage de-sludging pulp tank, i.e., the first de-sludging pulp tank 201, through the overflow pipeline 115. The pulp enters the first de-sludging slurry pump pre-pipeline 202 and then enters the first de-sludging slurry pump 203. After being pressurized by the first de-sludging slurry pump 203, the pulp is pumped into the first hydrocyclone 205 through the first de-sludging slurry pump pressure pipeline 204 for the first de-sludging operation. The floating flow obtains a primary sediment slurry product, which is part of the underflow pulp product, and the underflow is discharged to obtain a primary pulp product. Among them, the first hydrocyclone 205 can be a Φ250-20 hydrocyclone, that is, the nominal diameter of the hydrocyclone is 250 mm and the feed inlet diameter of the hydrocyclone is 20 mm.

[0058] Secondary de-sludging sub-step S22, feeding the primary sediment slurry product into the second hydrocyclone, obtaining a secondary sediment slurry product by overflow, and discharging the underflow to obtain a secondary pulp product.

[0059] Specifically, the primary pulp product obtained by the first de-sludging operation of the first hydrocyclone 205 enters the lithium roughing agitation tank 300 of the flotation equipment through the first de-sludging underflow pipeline 206 of the first hydrocyclone 205 for the next process operation, i.e., the flotation operation; the primary sediment slurry product obtained by the first de-sludging operation of the first hydrocyclone 205 enters the second de-sludging pulp tank 208 through the first de-sludging floating flow pipeline 207 of the first hydrocyclone 205. The pulp enters the second de-sludging slurry pump pre-pipeline 209 and then enters the second de-sludging slurry pump 210. After being pressurized by the second de-sludging slurry pump 210, the pulp is pumped into the second hydrocyclone 212 through the second de-sludging slurry pump pressure pipeline 211 for the second de-sludging operation. The floating flow obtains a secondary sediment slurry product, which is part of the underflow pulp product, and the underflow is discharged to obtain a secondary pulp product. Among them, the first hydrocyclone 205 can be a Φ250-30 hydrocyclone, that is, the nominal diameter of the hydrocyclone is 250 mm and the feed inlet diameter of the hydrocyclone is 30 mm.

[0060] Tertiary de-silting step S23: Feed the secondary sediment slurry product into a third hydrocyclone. The overflow gives the tertiary sediment slurry product as the sediment tailing slurry product, and the underflow discharge gives the tertiary pulp product.

[0061] Specifically, the secondary pulp product obtained from the second de-silting operation by the second hydrocyclone 212 enters the lithium roughing agitation tank 300 of the flotation equipment through the second de-silting underflow pipeline 214 of the second hydrocyclone 212 for the next process operation, i.e., the flotation operation; the secondary sediment slurry product obtained from the second de-silting operation by the second hydrocyclone 212 enters the third de-silting pulp tank 215 through the second de-silting overflow pipeline 213 of the second hydrocyclone 212. The pulp enters the third de-silting slurry pump 217 through the pipeline 216 in front of the third de-silting slurry pump. After being pressurized by the third de-silting slurry pump 217, the pulp is pumped into the third hydrocyclone 219 through the pressure pipeline 218 of the third de-silting slurry pump for the third de-silting operation. The overflow gives the tertiary sediment slurry product, which is part of the underflow pulp product, and the underflow discharge gives the tertiary pulp product. Among them, the third hydrocyclone 219 can be a hydrocyclone with a nominal diameter of Φ250 - 42, that is, the nominal diameter of the hydrocyclone is 250 mm and the diameter of the feed inlet of the hydrocyclone is 42 mm.

[0062] In this embodiment, the tertiary pulp product obtained from the third de-silting operation by the third hydrocyclone 219 enters the lithium roughing agitation tank 300 of the flotation equipment through the third de-silting underflow pipeline 221 of the third hydrocyclone 219 for the next process operation, i.e., the flotation operation; the tertiary sediment slurry product obtained from the second de-silting operation by the third hydrocyclone 219 is used as the sediment tailing slurry product and enters the tailing pulp tank 222 through the third de-silting overflow pipeline of the third hydrocyclone, i.e., the tail-stage overflow pipeline 220.

[0063] In this embodiment, the first hydrocyclone 205, the second hydrocyclone 212, and the third hydrocyclone 219 are based on a centrifugal force field. The fed product forms a rotational motion inside the hydrocyclone, so that the heavier ore particles are discharged as the underflow product, and the lighter sediment particles overflow as the overflow product. Due to the different particle sizes and densities of the sediment particles and ore particles, under the action of centrifugal force, the heavier ore particles move towards the cyclone wall and settle down along the wall to the bottom for discharge, while the lighter sediment particles move towards the center and overflow from the top, thus achieving the purpose of de-silting and sedimentation for ore dressing of the pulp. Utilizing the density difference between the sediment particles and ore particles in the pulp and the liquid, the ore particles settle to the bottom under the action of gravity. Based on the action of the centrifugal force field, the pulp can be injected into the hydrocyclone at a high speed in the tangential direction, forming a strong rotational motion inside the hydrocyclone.

[0064] In summary, the pulp desliming and sand sedimentation ore dressing method based on lithium ore provided in this embodiment achieves the purpose of pulp desliming and sand sedimentation through multi-stage desliming using a hydrocyclone under multiple centrifugal actions, that is, desliming and sand sedimentation are performed again on the basis of each classification. It can achieve desliming and sand sedimentation by classification, with stable product quality and large output. At the same time, it can also ensure the quality of pulp desliming and sand sedimentation after classification. On the premise of ensuring the quality of pulp ore dressing, it realizes the production goals of high efficiency, energy conservation, and environmental protection, avoiding the explosion risk, the risk of blockage of the conveying pipeline and the gravity flow pipeline during the sedimentation process of mineral particles in the high-concentration pulp, and solving the problem that the quality of the existing pulp desliming and sand sedimentation is poor, resulting in a large amount of ore content and poor pulp quality in the tail pulp obtained after the operation. It has created a precedent for the pulp desliming and sand sedimentation ore dressing of lithium ore in high-altitude and cold regions. In particular, it creates greater economic and social benefits for mining enterprises at an altitude of 4,600 meters and promotes the sustainable green development of the lithium mining industry. At the same time, the classification cyclone can realize continuous cyclic desliming and sand sedimentation operations, and the classification cyclone is efficient, energy-saving, and environmentally friendly.

[0065] System embodiment:

[0066] See Figure 7 , which is a structural block diagram of the pulp desliming and sand sedimentation ore dressing system based on lithium ore provided in the embodiment of the present invention. As shown in the figure, the ore dressing system includes: a grinding and classification module 10, a multi-stage desliming module 20, a tailings treatment module 30, and a flotation and dehydration module 40; among them, the grinding and classification module 10 is used to perform grinding and classification treatment on the pulp to obtain a grinding and classification overflow product; the multi-stage desliming module 20 is used to perform multi-stage desliming and sand sedimentation operations on the grinding and classification overflow product in sequence using a hydrocyclone for multi-stage desliming to obtain a sediment and tailing pulp product and an underflow pulp product discharged from each hydrocyclone for desliming; the tailings treatment module 30 is used to perform tailings treatment on the sediment and tailing pulp product. The flotation and dehydration module 40 is used to perform flotation operations on the underflow pulp products of each of the hydrocyclones for desliming to obtain a lithium pulp, a beryllium pulp, and a flotation tailing pulp, and perform dehydration operations on the lithium pulp and the beryllium pulp respectively to obtain lithium concentrate and beryllium concentrate.

[0067] See Figure 8, which is a structural block diagram of the grinding and classification module provided by an embodiment of the present invention. As shown in the figure, the grinding and classification module 10 may include: a grinding and screening sub-module 11, a screening operation sub-module 12, a mixing operation sub-module 13, a thickening operation sub-module 14, a grinding operation sub-module 15, and a classification operation sub-module 16; wherein, the grinding and screening sub-module 11 is used to subject lithium ore to a grinding and screening operation to obtain intermediate ore and divide it into two paths, namely path A and path B; the screening operation sub-module 12 is used to feed the intermediate ore and water in path A into a heavy medium classifier for screening operation to obtain undersize particle pulp and oversize particle product on the screen. The oversize particle product on the screen is subjected to a heavy medium separation operation to obtain a magnetic tailing pulp product; the mixing operation sub-module 13 is used to feed the undersize particle pulp and the magnetic tailing pulp product into a thickening pump sump to obtain a mixed slurry before thickening; the thickening operation sub-module 14 is used to feed the mixed slurry before thickening in the thickening pump sump into a thickener for thickening operation to obtain a thickened ore pulp product, and feed it into a hydrocyclone pump sump; the grinding operation sub-module 15 is used to feed the intermediate ore in path B into a grinding mill for grinding operation to obtain a grinding product, and feed it into the hydrocyclone pump sump, where it is mixed with the thickened ore pulp product to obtain a grinding pulp; the classification operation sub-module 16 is used to transport the grinding pulp in the hydrocyclone pump sump to a hydrocyclone for classification operation. After the classification operation, a classified overflow product and a classified underflow product are obtained, and the classified underflow product is fed into a grinding mill for grinding operation to obtain a grinding product, which is then fed into the hydrocyclone pump sump to be fed into the hydrocyclone for classification operation again, forming a closed-circuit grinding cycle operation.

[0068] See Figure 9 , which is a structural block diagram of the multiple desliming module provided by an embodiment of the present invention. As shown in the figure, the multiple desliming module 20 may include: a primary desliming sub-module 21, a secondary desliming sub-module 22, and a tertiary desliming sub-module 23; wherein, the primary desliming sub-module 21 is used to feed the classified overflow product of the grinding and classification into a first hydrocyclone, and overflow to obtain a primary sediment slurry product, and the underflow is discharged to obtain a primary ore pulp product; the secondary desliming sub-module 22 is used to feed the primary sediment slurry product into a second hydrocyclone, and overflow to obtain a secondary sediment slurry product, and the underflow is discharged to obtain a secondary ore pulp product; the tertiary desliming sub-module 23 is used to feed the secondary sediment slurry product into a third hydrocyclone, and overflow to obtain a tertiary sediment slurry product, and the underflow is discharged to obtain a tertiary ore pulp product.

[0069] Preferably, the first hydrocyclone, the second hydrocyclone, and / or the third hydrocyclone are based on a centrifugal force field, and the fed product forms a rotational motion in the hydrocyclone, so that the heavier ore particles are discharged as the underflow product, and the lighter sediment particles overflow as the overflow product.

[0070] Preferably, the multiple de-sludging module 20 is further configured to feed the grinding and classification overflow product into the primary de-sludging pulp tank, and pump it into the primary de-sludging hydrocyclone through a slurry pump; feed the de-sludged slurry product obtained by the de-sludging operation of the upper-stage de-sludging hydrocyclone into the corresponding de-sludging pulp tank of the lower-stage de-sludging hydrocyclone, and pump it into the lower-stage de-sludging hydrocyclone through a slurry pump.

[0071] In this embodiment, the de-sludging and sand-settling ore dressing method and the de-sludging and sand-settling ore dressing system have the same principle, and the related parts can be referred to each other.

[0072] It should be noted that in the description of the present invention, the terms indicating the direction or position relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or position relationship shown in the drawings. This is only for the convenience of description, rather than indicating or implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0073] 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside 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 situations.

[0074] 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 equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A beneficiation method for pulp desliming and sand sedimentation based on lithium ore, characterized in that, It includes the following steps: Grinding and classification step: performing grinding and classification treatment on the pulp to obtain the overflow product of grinding and classification; Multiple de-sludging steps: successively performing multiple de-sludging and sand-settling operations on the overflow product of grinding and classification through a multi-stage de-sludging hydrocyclone to obtain the sediment tailing slurry product and the underflow pulp products discharged from each stage of the de-sludging hydrocyclone; Tailings treatment step: performing tailings treatment on the sediment tailing slurry product.

2. The ore pulp desliming and sand settling ore dressing method based on lithium ore according to claim 1, wherein The multiple de-sludging steps include: Primary de-sludging sub-step: feeding the overflow product of grinding and classification into the first hydrocyclone, overflowing to obtain the primary sediment slurry product, and discharging the underflow to obtain the primary pulp product; Secondary de-sludging sub-step: feeding the primary sediment slurry product into the second hydrocyclone, overflowing to obtain the secondary sediment slurry product, and discharging the underflow to obtain the secondary pulp product; Tertiary de-sludging sub-step: feeding the secondary sediment slurry product into the third hydrocyclone, overflowing to obtain the tertiary sediment slurry product as the sediment tailing slurry product, and discharging the underflow to obtain the tertiary pulp product; the primary pulp product, the secondary pulp product, and the tertiary pulp product are all used as the underflow pulp products.

3. The ore pulp de-sludging and sand-settling beneficiation method based on lithium ore according to claim 2, wherein The first hydrocyclone, the second hydrocyclone, and / or the third hydrocyclone are based on a centrifugal force field, and the fed product forms a rotational motion inside the hydrocyclone, so that the heavier ore particles are discharged as the underflow product, and the lighter sediment particles overflow as the overflow product.

4. The ore pulp de-sludging and sand settling beneficiation method based on lithium ore according to any one of claims 1 to 3, characterized in that, It further includes the following steps: Flotation and dehydration step: performing flotation operations on the underflow pulp products of each stage of the de-sludging hydrocyclone to obtain lithium pulp, beryllium pulp, and flotation tailing pulp, and respectively performing dehydration operations on the lithium pulp and the beryllium pulp to obtain lithium concentrate and beryllium concentrate.

5. The ore pulp de-sludging and sand sedimentation ore dressing method based on lithium ore according to any one of claims 1 to 3, characterized in that, During the process of successively performing multiple de-sludging and sand-settling operations on the overflow product of grinding and classification through a multi-stage de-sludging hydrocyclone, Feeding the overflow product of grinding and classification into the primary de-sludging pulp tank, and pumping it into the primary de-sludging hydrocyclone through a slurry pump; Feeding the de-sludged slurry product obtained from the de-sludging and sand-settling operation of the upper-stage de-sludging hydrocyclone into the corresponding de-sludging pulp tank of the lower-stage de-sludging hydrocyclone, and pumping it into the lower-stage de-sludging hydrocyclone through a slurry pump.

6. A pulp de-sliming and sand-settling ore dressing system based on lithium ore, characterized in that, It includes: Grinding and classification module: used for performing grinding and classification treatment on the ore pulp to obtain the overflow product of grinding and classification; Multiple de-sludging module: used for successively performing multiple de-sludging and sand-settling operations on the overflow product of grinding and classification through a multi-stage de-sludging hydrocyclone to obtain the sediment tailing slurry product and the underflow pulp products discharged from each stage of the de-sludging hydrocyclone; Tailings treatment module: used for performing tailings treatment on the sediment tailing slurry product.

7. The ore pulp de-sludging and sand-settling ore dressing system based on lithium ore according to claim 6, wherein The multiple de-sludging module includes: Primary de-sludging sub-module: used for feeding the overflow product of grinding and classification into the first hydrocyclone, overflowing to obtain the primary sediment slurry product, and discharging the underflow to obtain the primary pulp product; Secondary de-sludging sub-module: used for feeding the primary sediment slurry product into the second hydrocyclone, overflowing to obtain the secondary sediment slurry product, and discharging the underflow to obtain the secondary pulp product; The tertiary desliming sub-module is used to feed the secondary sediment slurry product into the third hydrocyclone, obtain the tertiary sediment slurry product through overflow, and discharge the underflow to obtain the tertiary pulp product.

8. The ore pulp desliming and sand settling beneficiation system based on lithium ore according to claim 7, wherein the first hydrocyclone, the second hydrocyclone and / or the third hydrocyclone are based on a centrifugal force field, and the fed product forms a rotational motion in the hydrocyclone, so that the heavier ore particles are discharged as the underflow product, and the lighter sediment particles overflow as the overflow product.

9. The ore pulp de-sludging and sand-settling ore dressing system based on lithium ore according to any one of claims 6 to 8, characterized in that, It further includes: The flotation and dehydration module is used to perform flotation operations on the underflow pulp products of each stage of the desliming hydrocyclones to obtain lithium pulp, beryllium pulp and flotation tailing pulp, and perform dehydration operations on the lithium pulp and beryllium pulp respectively to obtain lithium concentrate and beryllium concentrate.

10. The ore pulp desliming and sand settling beneficiation system based on lithium ore according to any one of claims 6 to 8, wherein the multiple desliming module is further used to feed the overflow product of grinding and classification into the primary desliming pulp tank and pump it into the primary desliming hydrocyclone through a slurry pump; feed the deslimed slurry product obtained from the desliming and sand settling operation of the upper-stage desliming hydrocyclone into the corresponding desliming pulp tank of the lower-stage desliming hydrocyclone and pump it into the lower-stage desliming hydrocyclone through a slurry pump.

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