Metal mine waste treatment device

Abstract

The utility model provides a metal mine waste treatment device which comprises a shell, a crushing unit, a dissolving unit and a screening unit, the crushing unit comprises a motor, a first transmission shaft, a first grinding roller, a second transmission shaft, a second grinding roller and a first cone, the first cone and the top of the shell form a crushing cavity, and the output end of the motor is connected with the first transmission shaft; the other end of the first transmission shaft penetrates through the shell and is fixedly sleeved with a first grinding roller, the second transmission shaft is fixedly sleeved with a second grinding roller, one end of the first transmission shaft is fixedly sleeved with a driving gear, one end of the second transmission shaft is fixedly sleeved with a driven gear, and the driving gear is in meshed connection with the driven gear; a dissolving cavity is formed between the second cone and the first cone, the dissolving unit is located in the dissolving cavity, and the dissolving unit is connected with a medicament box body; the screening unit comprises a filter sieve, a guide plate, a solid waste receiving tank and a dissolving liquid tank. According to the invention, recycling of metal mine wastes is realized.

Description

Technical Field

[0001] The present application relates to the field of metal mine technology, and in particular to a metal mine waste treatment device. Background Art

[0002] Solid waste in metal mines mainly refers to solid deposits such as waste rock, waste slag, tailings, etc. accumulated on the ground and underground during the mining, selection and smelting process or after production is completed.

[0003] If these solid wastes are discharged directly, they not only occupy a large amount of land, but also have a very complex composition, containing a variety of harmful components and even radioactive substances. After being exposed to wind and rain, and under the combined effects of air and water, they undergo a series of physical, chemical, and biochemical changes, causing pollution and acidification of the surrounding environment and water bodies, and affecting the ecological environment. Furthermore, these wastes often contain a variety of metal elements. If not utilized, it will also be a huge waste of the country's metal mineral resources. Utility Model Content

[0004] The present application provides a metal mine waste treatment device to solve the above-mentioned problems mentioned in the background technology.

[0005] The present application provides a metal mine waste treatment device, comprising: a shell, a crushing unit, a dissolving unit and a screening unit, wherein the top of the shell is provided with a feed inlet, the bottom of the shell is provided with a dissolving liquid outlet, and the lower part of the side wall is provided with a solid waste outlet;

[0006] The crushing unit includes a motor, a first transmission shaft, a first grinding roller, a second transmission shaft, a second grinding roller and a first cone. The first cone and the top of the shell form a crushing chamber. The motor is arranged on the outside of the crushing chamber. The output end of the motor is connected to the first transmission shaft. The other end of the first transmission shaft horizontally penetrates the shell, and the first grinding roller is coaxially fixed on the outside. The second transmission shaft is arranged horizontally parallel to the first transmission shaft. The second grinding roller is fixedly sleeved on the outside of the second transmission shaft. A main gear is fixedly sleeved on one end of the first transmission shaft close to the motor, and a slave gear is fixedly sleeved on one end of the second transmission shaft close to the motor. The main gear is meshed with the slave gear. The junction between the first grinding roller and the second grinding roller is located directly below the feed inlet.

[0007] A second cone is provided below the first cone, a dissolving chamber is formed between the second cone and the first cone, a dissolving unit is located in the dissolving chamber, and the dissolving unit is connected to the medicine box;

[0008] The screening unit includes a filter screen, a material guide plate, a solid waste receiving tank and a dissolving liquid tank. The filter screen is arranged obliquely below the second cone. The lower end of the filter screen is connected to the solid waste outlet. The higher end of the material guide plate is connected to the solid waste outlet. The lower end of the material guide plate is located above the solid waste receiving tank. The dissolving liquid tank is connected to the dissolving liquid outlet.

[0009] Optionally, the dissolution unit includes a main drug pipe, multiple branch drug pipes and a nozzle. One end of the main drug pipe is connected to the drug box through a drug pump. The outlet end of the main drug pipe extends into the dissolution chamber and is connected to the side wall of the dissolution chamber. Multiple branch drug pipes are all connected to the main drug pipe, and the bottom of the multiple branch drug pipes is connected to a nozzle.

[0010] Optionally, the dissolution unit is also connected to an aeration structure, which includes a blower, an aeration pipe and an aerator. The blower is arranged outside the shell, and both ends of the aeration pipe are connected to the blower and the aerator respectively. The aerator is installed on the side wall of the second cone.

[0011] Optionally, a liquid level meter is provided in the dissolution chamber.

[0012] Optionally, the dissolving liquid tank is connected to one end of the drug main pipe close to the shell through a drug circulation pipe, and a circulation valve is provided on the drug circulation pipe.

[0013] Optionally, a metal ion detector is provided in the dissolving liquid tank.

[0014] Optionally, a plurality of through holes are further provided on the side wall of the first cone.

[0015] The metal mine waste treatment device provided in this application realizes the recycling and utilization of metal mine waste and has the following beneficial effects compared with the existing technology:

[0016] (1) By setting up a crushing chamber, the metal ore waste is fed into the shell through the feed port for crushing, so that the particle size of the metal ore waste is reduced, which is conducive to the subsequent reaction of the metal ore waste particles with the reagent, improves the dissolution efficiency of the metal ions, and thus helps to improve the metal recovery rate. By setting up a dissolution chamber, the crushed metal ore waste particles are mixed with the reagent to react, and a dissolving liquid containing metal ions and solid waste residue are obtained. The metal ions are transferred to the dissolving liquid, and the dissolving liquid and the solid waste residue are screened by the screening unit to separate the dissolving liquid containing metal ions, thereby realizing the recycling of metal ions. At the same time, the collected solid waste residue is used for the production of building materials, road auxiliary materials or aerated bricks, etc., which not only greatly reduces the stacking of solid waste and avoids the pollution of metal ore waste to the environment, but also improves the comprehensive utilization efficiency of resources, with good economic and environmental benefits.

[0017] (2) By setting up an aeration structure, the mixture of high-pressure reagent and metal ore waste particles in the dissolution unit is stirred while aerating the dissolution unit, thereby extending the contact time between the reagent and the metal ore waste particles, increasing the contact area, and further improving the metal recovery rate. When the liquid level in the dissolution chamber is set to be equal to the first preset liquid level, the blower is turned on to aerate and stir the dissolution chamber. When the liquid level in the dissolution chamber is equal to the second preset liquid level, the blower is turned off and the first solenoid valve is turned on to discharge the mixture of the reacted dissolution liquid and solid waste residue into the screening unit. This setting can open and close the aeration structure according to the liquid level in the dissolution chamber, which is not only conducive to the efficient reaction of the reagent and the metal ore waste particles, but also conducive to the control of the aeration structure, making the device efficient and convenient to use.

[0018] (3) By setting up a reagent circulation pipe and a circulation valve, the dissolving liquid in the dissolving liquid tank is transported to the dissolving chamber together with the reagent in the reagent box through the reagent circulation pipe for further reaction, thereby improving the utilization rate of the reagent and at the same time increasing the concentration of metal ions in the dissolving liquid, which is convenient for subsequent further recovery of the metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic structural diagram of a metal mine waste treatment device provided in one embodiment of the present application;

[0021] Figure 2 A schematic structural diagram of a crushing unit provided in one embodiment of the present application;

[0022] Figure 3 A schematic structural diagram of a dissolution unit provided in one embodiment of the present application;

[0023] Figure 4 A schematic structural diagram of a metal mine waste treatment device provided in another embodiment of the present application;

[0024] Figure 5 A schematic structural diagram of a metal mine waste treatment device provided in yet another embodiment of the present application;

[0025] Description of reference numerals:

[0026] 1: Shell, 101: Crushing chamber, 102: Dissolving chamber, 110: Feeding port, 120: Dissolving liquid outlet, 121: Second solenoid valve, 130: Solid waste outlet, 210: Motor, 220: First transmission shaft, 221: Main gear, 230: First grinding roller, 240: Second transmission shaft, 241: Slave gear, 250: Second grinding roller, 260: First cone, 261: Through hole, 310: Second cone, 311 : First solenoid valve, 320: Liquid level meter, 401: Chemical box, 410: Chemical main pipe, 411: Chemical pump, 420: Chemical branch pipe, 430: Nozzle, 510: Filter screen, 520: Material guide plate, 530: Solid waste receiving tank, 540: Dissolving liquid tank, 541: Metal ion detector, 550: Chemical circulation pipe, 551: Circulation valve, 610: Blower, 620: Aeration pipe, 630: Aerator. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0028] like Figure 1 and Figure 2 As shown, the present application provides a metal mine waste treatment device, comprising: a shell 1, a crushing unit, a dissolving unit and a screening unit, wherein the top of the shell 1 is provided with a feed inlet 110, the bottom of the shell 1 is provided with a dissolving liquid outlet 120, and the lower part of the side wall is provided with a solid waste outlet 130;

[0029] The crushing unit includes a motor 210, a first transmission shaft 220, a first grinding roller 230, a second transmission shaft 240, a second grinding roller 250 and a first cone 260. The first cone 260 and the top of the shell 1 form a crushing chamber 101. The motor 210 is arranged on the outside of the crushing chamber 101. The output end of the motor 210 is connected to the first transmission shaft 220. The other end of the first transmission shaft 220 horizontally passes through the shell 1, and the first grinding roller 230 is coaxially fixed on the outside. The second transmission shaft 240 is arranged parallel to the first transmission shaft 220 in the horizontal direction. The second grinding roller 250 is fixedly sleeved on the outside of the second transmission shaft 240. The end of the first transmission shaft 220 close to the motor 210 is fixedly sleeved with a main gear 221, and the end of the second transmission shaft 240 close to the motor 210 is fixedly sleeved with a slave gear 241. The main gear 221 is meshed with the slave gear 241. The intersection between the first grinding roller 230 and the second grinding roller 250 is located directly below the feed inlet 110.

[0030] A second cone 310 is provided below the first cone 260. A dissolving chamber 102 is formed between the second cone 310 and the first cone 260. The dissolving unit is located in the dissolving chamber 102 and is connected to a medicine box 401.

[0031] The screening unit includes a filter screen 510, a material guide plate 520, a solid waste receiving tank 530 and a dissolving liquid tank 540. The filter screen 510 is tilted and arranged below the second cone 310. The lower end of the filter screen 510 is connected to the solid waste outlet 130. The higher end of the material guide plate 520 is connected to the solid waste outlet 130. The lower end of the material guide plate 520 is located above the solid waste receiving tank 530. The dissolving liquid tank 540 is connected to the dissolving liquid outlet 120.

[0032] Specifically, metal mine waste contains unextracted metals. If these metal mine wastes are not treated and discharged, they will not only pollute the environment, occupy a large area, but also result in a large waste of metal resources. The metal mine waste treatment device provided by this application can extract the metal ions in these wastes, and the resulting solid waste residue can be used as filler, building materials, etc., not only achieving the purpose of waste recycling, but also avoiding the problem of land environmental pollution caused by the large accumulation of solid waste.

[0033] The metal ore waste is fed into the crushing chamber 101 in the shell 1 through the feed port 110 for crushing. During the crushing process, the motor 210 provides power to drive the first transmission shaft 220 to rotate, and the first transmission shaft 220 drives the main gear 221 and the first grinding roller 230 to rotate. The main gear 221 drives the slave gear 241 meshed with it to rotate. The slave gear 241 is fixedly sleeved on the second transmission shaft 240, thereby driving the second transmission shaft 240 to rotate. The second transmission shaft 240 drives the second grinding roller 250 to rotate, and the first grinding roller 230 and the second grinding roller 250 rotate. The rotation directions of the first grinding roller 230 and the second grinding roller 250 are opposite, so that the metal ore waste falling from the feed port 110 falls between the first grinding roller 230 and the second grinding roller 250. The first grinding roller 230 and the second grinding roller 250 cooperate with each other to crush the metal ore waste, so that the particle size of the metal ore waste is reduced, which is conducive to the subsequent reaction of the metal ore waste particles with the reagent, improves the dissolution efficiency of the metal ions, and thus helps to improve the metal recovery rate. The main gear 221 and the slave gear 241 are both disposed outside the housing 1 to prevent the falling of waste particles from affecting the rotation of the main gear 221 and the slave gear 241 .

[0034] A discharge port is provided at the bottom of the first cone 260. The crushed metal ore waste falls from the discharge port of the first cone 260 into the dissolution chamber 102 under the action of gravity. The reagent in the reagent box 401 is transported to the dissolution chamber 102 through the dissolution unit. The crushed metal ore waste particles are mixed with the reagent to react, and the obtained metal ions are transferred to the dissolving liquid and fall to the screening unit through the outlet at the bottom of the second cone 310 together with the solid waste residue remaining after the reaction.

[0035] A first solenoid valve 311 is installed at the outlet at the bottom of the second cone 310. This valve controls the output of the mixture of reagent and metal ore waste particles, allowing them to mix and react within the dissolution chamber 102 for a specified period of time before being discharged, thereby increasing the metal dissolution rate. Operators can adjust the opening and closing times of first solenoid valve 311 based on the desired duration, depending on the actual operating conditions.

[0036] The screening unit includes a filter screen 510, a guide plate 520, a solid waste receiving tank 530 and a dissolving liquid tank 540. The mixture of the dissolving liquid and the solid waste residue falls onto the filter screen 510 under the action of gravity. The dissolving liquid falls to the bottom of the shell 1 through the sieve holes of the filter screen 510 and enters the dissolving liquid tank 540 through the dissolving liquid outlet 120. The solid waste residue that does not pass through the filter screen 510 falls to the solid waste outlet 130 along the inclined direction of the filter screen 510, and falls into the solid waste receiving tank 530 under the guidance of the guide plate 520 for collection, thereby separating the metal ions from the solid waste residue and realizing the recovery of the metal ions.

[0037] Furthermore, after the solid waste residue in the solid waste receiving tank 530 is filtered through a filter press, the obtained filtrate is transported to the dissolving liquid tank 540, and the filter cake is recycled to further improve the recovery rate of metal ions.

[0038] The present application realizes the recycling of metal mine waste through the above scheme. By setting a crushing chamber, the metal mine waste is input into the shell through the feed port for crushing, so that the particle size of the metal mine waste is reduced, which helps the subsequent reaction of the metal mine waste particles with the reagent, improves the dissolution efficiency of the metal ions, and thus helps to improve the recovery rate of the metal. By setting a dissolving chamber, the crushed metal mine waste particles are mixed with the reagent to react, and a dissolving solution containing metal ions and solid waste residue are obtained. The metal ions are transferred to the dissolving solution, and the dissolving solution and the solid waste residue are screened by a screening unit to separate the dissolving solution containing metal ions, thereby realizing the recycling of metal ions. At the same time, the collected solid waste residue is used for the production of building materials, road auxiliary materials or aerated bricks, etc., which not only greatly reduces the stacking of solid waste and avoids the pollution of the environment by metal mine waste, but also improves the comprehensive utilization efficiency of resources, with good economic and environmental benefits.

[0039] like Figure 3 and Figure 4 As shown, optionally, the dissolution unit includes a drug main pipe 410, multiple drug branch pipes 420 and a nozzle 430. One end of the drug main pipe 410 is connected to the drug box 401 through a drug pump 411. The outlet end of the drug main pipe 410 extends into the dissolution chamber 102 and is connected to the side wall of the dissolution chamber 102. The multiple drug branch pipes 420 are all connected to the drug main pipe 410, and the bottom of the multiple drug branch pipes 420 is connected to the nozzle 430.

[0040] Specifically, under the negative pressure suction of the reagent pump 411, the reagent in the reagent box 401 is extracted through the reagent main pipe 410 and distributed to multiple reagent branch pipes 420, and then sprayed out through the nozzle 430 connected to the reagent branch pipe 420 to atomize the reagent. This can increase the contact area between the reagent and the metal mine waste particles, which is beneficial to the dissolution of metal ions and improve the metal recovery rate.

[0041] Optionally, the dissolution unit is also connected to an aeration structure, which includes a blower 610, an aeration pipe 620 and an aerator 630. The blower 610 is arranged outside the shell 1, and the two ends of the aeration pipe 620 are respectively connected to the blower 610 and the aerator 630. The aerator 630 is installed on the side wall of the second cone 310.

[0042] Specifically, the aeration structure aerates the dissolution unit while stirring the mixture of the reagent and the metal ore waste particles in the dissolution unit, thereby extending the contact time between the reagent and the metal ore waste particles, increasing the contact area, and further improving the metal recovery rate.

[0043] like Figure 4 As shown, optionally, a liquid level meter 320 is provided in the dissolution chamber 102 .

[0044] Specifically, the liquid level meter 320 is used to detect the liquid level in the dissolution chamber 102. When the liquid level in the dissolution chamber 102 is set to a first preset level, the blower 610 is turned on to aerate and stir the dissolution chamber 102. When the liquid level in the dissolution chamber 102 is equal to a second preset level, the blower 610 is turned off and the first solenoid valve 311 is opened to discharge the mixture of the reacted dissolved liquid and solid waste into the screening unit. This arrangement enables the aeration structure to be opened and closed according to the liquid level in the dissolution chamber 102, and the second preset level is higher than the first preset level. This not only facilitates the efficient reaction between the reagent and the metal ore waste particles, but also facilitates the control of the aeration structure, making the device efficient and convenient to use.

[0045] The solution outlet 120 of the housing 1 is further provided with a second solenoid valve 121 for controlling the discharge of the solution in the housing 1 .

[0046] like Figure 5As shown, optionally, the dissolving liquid tank 540 is connected to one end of the drug main pipe 410 close to the shell 1 through a drug circulation pipe 550 , and a circulation valve 551 is provided on the drug circulation pipe 550 .

[0047] Specifically, the solution in the solution tank 540 may still contain unreacted reagents. If the reagents are not recycled and the reagents in the reagent box 401 are simply transferred to the dissolution chamber 102 for reaction, the reagents will be wasted. Opening the circulation valve 551 allows the solution in the solution tank 540 to be transferred to the dissolution chamber 102 through the reagent circulation pipe 550 together with the reagents in the reagent box 401 for further reaction. This improves the utilization rate of the reagents and increases the concentration of metal ions in the solution, facilitating subsequent further recovery of the metals.

[0048] Optionally, a metal ion detector 541 is provided in the dissolving liquid tank 540 .

[0049] Specifically, the metal ion detector 541 is used to detect the concentration of metal ions in the solution in the solution tank 540. If the metal ion concentration detected by the metal ion detector 541 is less than a first preset metal ion concentration, the circulation valve 551 is opened, and the solution in the solution tank 540 is transported to the dissolution chamber 102 through the reagent circulation pipe 550 together with the reagent in the reagent box 401 for further reaction. If the metal ion concentration detected by the metal ion detector 541 is greater than or equal to the first preset metal ion concentration, the circulation valve 551 is closed. This facilitates convenient operation of the device and reduces reagent waste.

[0050] Optionally, a plurality of through holes 261 are further defined on the side wall of the first cone 260 .

[0051] Specifically, the crushed metal ore waste particles fall from the discharge port of the first cone 260 into the dissolution chamber 102 under the action of gravity. As the crushing proceeds, the metal ore waste particles in the first cone 260 continue to accumulate, and can fall into the dissolution chamber 102 through the multiple through holes 261 on the side wall of the first cone 260, thereby avoiding the accumulation of metal ore waste particles above the first cone 260.

[0052] The technical solution of this application is described in detail below with reference to specific embodiments.

[0053] The operation process of the metal mine waste treatment device in this embodiment is as follows:

[0054] The metal ore waste is fed into the crushing chamber 101 in the shell 1 through the feed port 110 for crushing. During the crushing process, the motor 210 provides power to drive the first transmission shaft 220 to rotate, the first transmission shaft 220 drives the main gear 221 and the first grinding roller 230 to rotate, the main gear 221 drives the slave gear 241 to rotate, the slave gear 241 drives the second transmission shaft 240 to rotate, the second transmission shaft 240 drives the second grinding roller 250 to rotate, and the rotation directions of the first grinding roller 230 and the second grinding roller 250 are opposite, so that the metal ore waste falling from the feed port 110 falls between the first grinding roller 230 and the second grinding roller 250, and the first grinding roller 230 and the second grinding roller 250 cooperate with each other to crush the metal ore waste, so that the particle size of the metal ore waste is reduced.

[0055] A discharge port is provided at the bottom of the first cone 260. The crushed metal ore waste falls from the discharge port of the first cone 260 into the dissolution chamber 102 under the action of gravity. Simultaneously, under the negative pressure of the reagent pump 411, the reagent in the reagent tank 401 is drawn out through the reagent main pipe 410 and distributed to multiple reagent branch pipes 420. The reagent is then sprayed out through the nozzle 430 connected to the reagent branch pipes 420, atomizing the reagent. The atomized reagent reacts with the falling metal ore waste to produce a mixture of a solution containing metal ions and solid waste residue. When the liquid level value of the liquid level gauge 320 in the dissolution chamber 102 reaches a first preset level, the blower 610 is turned on to aerate and stir the dissolution chamber 102. When the liquid level in the dissolution chamber 102 reaches a second preset level, the blower 610 is turned off and the first solenoid valve 311 is opened to discharge the reacted solution and solid waste residue mixture into the screening unit.

[0056] The mixture of the dissolving liquid and the solid waste falls onto the filter screen 510 under the action of gravity. The dissolving liquid falls through the mesh of the filter screen 510 to the bottom of the housing 1 and enters the dissolving liquid tank 540 through the dissolving liquid outlet 120. The solid waste that does not pass through the filter screen 510 falls along the inclined direction of the filter screen 510 to the solid waste outlet 130 and, guided by the guide plate 520, falls into the solid waste receiving tank 530 for collection. The collected solid waste is used in the production of building materials, road auxiliary materials, or aerated bricks. If the metal ion concentration value detected by the metal ion detector 541 is less than the first preset metal ion concentration, the circulation valve 551 is opened, and the dissolving liquid in the dissolving liquid tank 540 is transported to the dissolving chamber 102 through the reagent circulation pipe 550 together with the reagent in the reagent box 401 for further reaction. If the metal ion concentration value detected by the metal ion detector 541 is greater than or equal to the first preset metal ion concentration, the circulation valve 551 is closed.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A metal mine waste treatment device, characterized in that: include: A shell (1), a crushing unit, a dissolving unit and a screening unit, wherein the top of the shell (1) is provided with a feed inlet (110), the bottom of the shell (1) is provided with a dissolving liquid outlet (120), and the lower part of the side wall is provided with a solid waste outlet (130); The crushing unit comprises a motor (210), a first transmission shaft (220), a first grinding roller (230), a second transmission shaft (240), a second grinding roller (250) and a first cone (260), wherein the first cone (260) and the top of the shell (1) form a crushing chamber (101), the motor (210) is arranged outside the crushing chamber (101), the output end of the motor (210) is connected to the first transmission shaft (220), the other end of the first transmission shaft (220) horizontally passes through the shell (1), and the first grinding roller (230) is coaxially fixedly sleeved on the outside, and the second transmission shaft (240) is arranged in parallel with the first transmission shaft (220) in the horizontal direction, the second grinding roller (250) is fixedly sleeved on the outer side of the second transmission shaft (240), the end of the first transmission shaft (220) close to the motor (210) is fixedly sleeved with a main gear (221), the end of the second transmission shaft (240) close to the motor (210) is fixedly sleeved with a slave gear (241), the main gear (221) is meshed with the slave gear (241), and the intersection between the first grinding roller (230) and the second grinding roller (250) is located directly below the feed port (110); A second cone (310) is provided below the first cone (260), a dissolving chamber (102) is formed between the second cone (310) and the first cone (260), the dissolving unit is located in the dissolving chamber (102), and the dissolving unit is connected to a medicine box (401); The screening unit includes a filter screen (510), a material guide plate (520), a solid waste receiving trough (530) and a dissolving liquid trough (540), wherein the filter screen (510) is tiltedly arranged below the second cone (310), the lower end of the filter screen (510) is connected to the solid waste outlet (130), the higher end of the material guide plate (520) is connected to the solid waste outlet (130), the lower end of the material guide plate (520) is located above the solid waste receiving trough (530), and the dissolving liquid trough (540) is connected to the dissolving liquid outlet (120).

2. The metal mine waste treatment device according to claim 1, characterized in that: The dissolution unit includes a main drug pipe (410), a plurality of branch drug pipes (420) and a nozzle (430). One end of the main drug pipe (410) is connected to the drug box (401) via a drug pump (411). The outlet end of the main drug pipe (410) extends into the dissolution chamber (102) and is connected to the side wall of the dissolution chamber (102). The plurality of branch drug pipes (420) are all connected to the main drug pipe (410). The bottom of the plurality of branch drug pipes (420) is connected to the nozzle (430).

3. The metal mine waste treatment device according to claim 2, characterized in that: The dissolution unit is also connected to an aeration structure, which includes a blower (610), an aeration pipe (620) and an aerator (630). The blower (610) is arranged outside the shell (1), and the two ends of the aeration pipe (620) are respectively connected to the blower (610) and the aerator (630). The aerator (630) is installed on the side wall of the second cone (310).

4. The metal mine waste treatment device according to claim 2, characterized in that: A liquid level meter (320) is provided in the dissolving chamber (102).

5. The metal mine waste treatment device according to claim 2, characterized in that: The dissolving liquid tank (540) is connected to one end of the drug main pipe (410) close to the shell (1) through a drug circulation pipe (550), and a circulation valve (551) is provided on the drug circulation pipe (550).

6. The metal mine waste treatment device according to claim 5, characterized in that: A metal ion detector (541) is provided in the dissolving liquid tank (540).

7. The metal mine waste treatment device according to any one of claims 1 to 6, characterized in that: A plurality of through holes (261) are also provided on the side wall of the first cone (260).

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