Grinding device for strengthening recovery of fine particle level associated gold and silver in lead-zinc ore

Abstract

This utility model discloses a grinding device for enhanced recovery of fine-grained associated gold and silver from lead-zinc ore. The device includes a grinding cylinder and a grinding base. The grinding base is fixedly installed inside the grinding cylinder, and a grinding head is installed on the inner side of the grinding base. Beneficial effects: This utility model is equipped with a ring pipe and nozzles. During the grinding process, the lead-zinc ore, after being crushed, is fed into the grinding cylinder. The drive motor rotates the grinding head, creating relative rotation between it and the grinding base. The lead-zinc ore entering between the grinding head and the grinding base is gradually ground into fine-grained particles. During the grinding process, acid is pumped into the ring pipe through an acid pump pipe and sprayed onto the surface of the lead-zinc ore through the nozzles. The lead-zinc ore reacts with the acid to generate a salt solution. Gold and silver that do not react with the acid remain as particles and fall onto the top surface of the screen plate, thus completing the separation and recovery. Compared to the traditional method of grinding first and then separating, this device performs separation simultaneously during the grinding process, resulting in higher efficiency and more convenient recovery.

Description

Technical Field

[0001] This utility model relates to the field of gold and silver recovery technology in lead-zinc ore, specifically to a grinding device for enhanced recovery of fine-grained associated gold and silver in lead-zinc ore. Background Technology

[0002] Lead-zinc ore is a mineral deposit rich in the metallic elements lead and zinc. Lead and zinc have a wide range of applications in the electrical, machinery, military, metallurgical, chemical, light, and pharmaceutical industries. In addition, lead metal also has significant uses in the nuclear and petroleum industries. my country's lead-zinc mines are mainly concentrated in Yunnan, Inner Mongolia, Gansu, Guangdong, Hunan, and Guangxi.

[0003] Lead-zinc ore typically contains associated gold and silver. Traditional grinding equipment uses ball mills to crush the lead-zinc ore along with associated gold and silver into fine particles. Subsequently, the associated gold and silver, which do not react with the acid, are separated through acid washing. Then, they are further separated by screening. The typical process for recovering associated gold and silver involves crushing, grinding, acid washing, and screening, which is a long process with low efficiency and can be further improved. At the same time, traditional screening equipment is vibrating screens, which rely on vibrating motors for driving and produce a lot of noise. This process can also be further improved. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a grinding device for enhanced recovery of fine-grained associated gold and silver from lead-zinc ore, which has the advantage of improved working efficiency, thereby solving the problems mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned advantages of improved work efficiency, the specific technical solution adopted by this utility model is as follows: A grinding device for enhanced recovery of fine-grained associated gold and silver in lead-zinc ore includes a grinding cylinder and a grinding base. The grinding base is fixedly installed inside the grinding cylinder, and a grinding head is installed on the inner side of the grinding base. A ring pipe is fixedly mounted on the top of the grinding cylinder, and a nozzle is connected through the bottom surface of the ring pipe. A first drive motor is fixedly installed on the top surface of the grinding cylinder, and the output end of the first drive motor is fixedly connected to the top surface of the grinding head. An acid pumping pipe is connected through the ring pipe.

[0008] Furthermore, a screen plate is arranged inside the grinding cylinder below the grinding base, and a guide rod and a connecting plate are fixedly connected to both ends of the screen plate, and the guide rod and the connecting plate both penetrate the grinding cylinder and are slidably connected to the grinding cylinder. A rack is fixedly installed on the surface of the connecting plate, and a second drive motor is fixedly installed between the racks on one side of the grinding cylinder, and a half gear is installed at the output end of the second drive motor.

[0009] Furthermore, a spring is sleeved on the outside of the guide rod, and the two ends of the spring are fixedly connected to the screen plate and the inner wall of the grinding cylinder, respectively.

[0010] Furthermore, a feeding port is connected through the top surface of the grinding cylinder, and a collection door is hinged to the front vertical surface of the grinding cylinder.

[0011] Furthermore, the sieve plates are arranged in two sets from top to bottom, and the surface of the sieve plates is densely covered with sieve holes.

[0012] Furthermore, a discharge pipe is connected through the bottom surface of the grinding cylinder.

[0013] Furthermore, a collecting plate is fixedly installed on the inner wall of the grinding cylinder, and the bottom surface of the collecting plate slides against the top surface of the screen plate.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a grinding device for enhanced recovery of fine-grained associated gold and silver in lead-zinc ore, which has the following beneficial effects:

[0016] (1) This utility model is equipped with a ring pipe and a nozzle. During the grinding process, the lead-zinc ore is crushed and put into the grinding cylinder. The drive motor drives the grinding head to rotate, and relative rotation occurs between the grinding head and the grinding base. The lead-zinc ore that enters between the grinding head and the grinding base is gradually ground into fine particles. During the grinding process, the acid solution enters the ring pipe through the acid solution pump pipe and is sprayed onto the surface of the lead-zinc ore through the nozzle. The lead-zinc ore reacts with the acid solution to generate a salt solution. The gold and silver that do not react with the acid solution still fall into the top of the screen plate in granular form, thus completing the separation and recovery. Compared with the traditional method of grinding first and then separating, this device performs separation simultaneously during the grinding process, which is more efficient and more convenient for recovery.

[0017] (2) This utility model is equipped with a double-layer sieve plate. When separating associated gold and silver, the drive motor drives the half gear to rotate. The half gear rotates and meshes with the rack intermittently, driving the connecting plate to move back and forth, and then driving the sieve plate to move back and forth laterally, so as to dynamically screen the associated gold and silver. Compared with the traditional vibrating sieve, this device not only improves the screening effect and reduces clogging, but also avoids the situation where the vibrating motor has a lot of noise and is prone to unstable operation, thus further improving the work efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the internal structure of a grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore according to an embodiment of the present utility model.

[0020] Figure 2 This is a front view of a grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore according to an embodiment of the present utility model;

[0021] Figure 3 This is a rear view of a grinding device for enhanced recovery of fine-grained associated gold and silver in lead-zinc ore according to an embodiment of the present utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the sieve plate according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Grinding cylinder; 2. Grinding head; 3. Grinding base; 4. First drive motor; 5. Ring pipe; 6. Nozzle; 7. Acid pump pipe; 8. Screen plate; 9. Discharge pipe; 10. Collecting plate; 11. Guide rod; 12. Spring; 13. Connecting plate; 14. Rack; 15. Half gear; 16. Collection door; 17. Feed port; 18. Second drive motor. Detailed Implementation

[0025] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0026] According to an embodiment of the present invention, a grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore is provided.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Please refer to them. Figure 1 and Figure 2A grinding device for enhanced recovery of fine-grained gold and silver associated with lead-zinc ore according to an embodiment of this utility model includes a grinding cylinder 1 and a grinding base 3. The grinding cylinder 1, as the core load-bearing component of the entire device, is integrally formed from high-strength alloy steel. Its inner wall undergoes special polishing treatment, which effectively reduces material adhesion during the grinding process, while enhancing wear resistance and extending the equipment's service life. The grinding base 3 is fixedly installed inside the grinding cylinder 1. The grinding base 3 is arranged in a ring and is made of high-hardness wear-resistant ceramic material. Its top is designed with a trumpet-shaped structure; this unique shape helps guide the material smoothly into the grinding area and prevents material splashing during grinding, improving grinding efficiency and safety. A grinding head 2 is installed inside the grinding base 3. The grinding head 2 and grinding base 3 are coaxially arranged, and the gap between them is precisely calculated and adjusted to ensure the uniformity and stability of the grinding effect. The bottom distance between the grinding head 2 and the grinding base 3 is precisely matched to the target particle size of the lead-zinc ore. This precise dimensional design ensures that the lead-zinc ore is accurately processed into the required fine-grained particles during the grinding process, meeting the requirements for subsequent separation and recovery. Furthermore, a ring pipe 5 is fixedly mounted on the top of the grinding cylinder 1. The ring pipe 5 adopts a spiral design to further increase the residence time of the acid in the pipe, making the acid distribution more uniform. A nozzle 6 is connected through the bottom of the ring pipe 5. The nozzle 6 is an atomizing nozzle that can evenly spray the acid onto the surface of the lead-zinc ore, ensuring sufficient contact and reaction between the acid and the lead-zinc ore. Both the ring pipe 5 and the nozzle 6 are treated with acid corrosion resistance and coated with a special corrosion-resistant coating, which can effectively resist acid erosion and extend the service life of the components. A first drive motor 4 is fixedly mounted on the top surface of the grinding cylinder 1. The first drive motor 4 is a high-precision servo motor, characterized by stable speed and strong power. The output end of the first drive motor 4 is fixedly connected to the top surface of the grinding head 2, and stable power transmission is achieved through a high-strength coupling. The ring pipe 5 is connected to the acid pump pipe 7, which has a double-layer structure. The inner layer is made of acid-resistant material, and the outer layer is a heat insulation layer to prevent temperature changes in the acid from affecting the reaction effect during transportation. The other end of the acid pump pipe 7 is connected to the acid pumping equipment (not shown in the figure). During the grinding process, the lead-zinc ore is crushed and fed into the grinding cylinder 1. The drive motor drives the grinding head 2 to rotate, which rotates relative to the grinding base 3. The lead-zinc ore between the grinding head 2 and the grinding base 3 is gradually ground into fine particles. During the grinding process, the acid enters the ring pipe 5 through the acid pump pipe 7 and is sprayed onto the surface of the lead-zinc ore through the nozzle 6. The lead-zinc ore reacts with the acid to form a salt solution. Gold and silver that do not react with the acid fall as particles onto the top surface of the screen plate 8, thus completing the separation and recovery. Compared with the traditional method of grinding first and then separating, this device performs separation simultaneously during the grinding process, reducing intermediate steps, reducing losses during material transfer, and improving working efficiency and recovery.

[0028] Please refer to Figure 2 and Figure 4Inside the grinding cylinder 1, below the grinding base 3, is a screen plate 8. The screen plate 8 is made of special stainless steel and undergoes surface passivation treatment to greatly enhance its corrosion resistance. Guide rods 11 and connecting plates 13 are fixedly connected to both ends of the screen plate 8. The guide rods 11 and connecting plates 13 are horizontally arranged. The guide rods 11 use high-precision linear guides with a hardened surface, resulting in high hardness and wear resistance, providing precise guidance for the movement of the screen plate 8 and reducing frictional resistance. Both the guide rods 11 and connecting plates 13 penetrate the grinding cylinder 1 and slide together. High-precision sliding bearings ensure smooth and stable horizontal movement of the screen plate 8. A rack 14 is fixedly mounted on the surface of the connecting plate 13. The rack 14 is made of high-strength alloy steel and precision-machined, resulting in high tooth profile accuracy and high transmission efficiency. Furthermore, a second drive motor 18 is fixedly installed on one side of the grinding cylinder 1 between the racks 14. The second drive motor 18 is an adjustable speed motor, which can flexibly adjust the screening speed according to the actual screening requirements. A half-gear 15 is installed at the output end of the second drive motor 18. During the separation of associated gold and silver, the drive motor drives the half-gear 15 to rotate. The half-gear 15 intermittently meshes with the racks 14. By precisely controlling the number of teeth and the rotation angle of the half-gear 15, the reciprocating speed and stroke of the screen plate 8 can be precisely adjusted, driving the connecting plate 13 to reciprocate, and thus driving the screen plate 8 to reciprocate laterally, dynamically screening the associated gold and silver. Compared with traditional vibrating screens, this device not only improves the screening effect by effectively preventing screen hole clogging and improving screening efficiency through the reciprocating movement of the screen plate, but also avoids the high noise of vibrating motors and the instability of equipment operation, further improving work efficiency.

[0029] Please refer to Figure 1 and Figure 4 A spring 12 is sleeved on the outside of the guide rod 11. The spring 12 is made of high-strength spring steel and has undergone a special heat treatment process, which gives it good elasticity and fatigue strength. The two ends of the spring 12 are fixedly connected to the screen plate 8 and the inner wall of the grinding cylinder 1, respectively. Multiple sets of guide rods 11 are arranged in a symmetrical distribution to guide the movement of the screen plate 8. Under the elastic action of the spring 12, the screen plate 8 can be easily reset.

[0030] Please refer to Figure 1 and Figure 2 The top surface of the grinding cylinder 1 is connected to a feed inlet 17, which is equipped with an openable and closable sealing cover with a sealing ring to effectively prevent dust leakage during grinding and ensure a clean working environment. A collection door 16 is hinged to the front of the grinding cylinder 1, corresponding to the position of the screen plate 8. The collection door 16 adopts a quick-opening structure, allowing for easy opening and closing by personnel to facilitate the recovery of associated gold and silver filtered out from the top surface of the screen plate 8.

[0031] Please refer to Figure 1 and Figure 4 Two sets of sieve plates 8 are arranged from top to bottom, forming a multi-stage screening structure that enables finer screening of associated gold and silver. Furthermore, the surface of the sieve plates 8 is densely covered with sieve holes, the hole diameter of which is precisely designed to be smaller than the target particle size of the associated gold and silver. By rationally setting the shape and arrangement of the sieve holes, screening accuracy and efficiency are further improved.

[0032] Please refer to Figure 1 and Figure 3 The bottom surface of the grinding cylinder 1 is connected to a discharge pipe 9, which is equipped with a flow control valve. The discharge speed of the acid solution and lead-zinc ore mixture can be adjusted according to the actual production needs, so as to facilitate the continuous discharge of the acid solution and lead-zinc ore mixture.

[0033] Please refer to Figure 1 A collection plate 10 is fixedly installed on the inner wall of the grinding cylinder 1. The collection plate 10 adopts an arc-shaped design with a smooth surface. The bottom surface of the collection plate 10 slides against the top surface of the screen plate 8. The collection plate 10 is arranged at an angle. By precisely controlling the tilt angle of the collection plate 10, the associated gold and silver can be effectively guided to the central area of ​​the screen plate 8, preventing the associated gold and silver from falling from both ends of the screen plate 8, which facilitates centralized recycling in the later stage.

[0034] Working principle: During the grinding process, the lead-zinc ore is crushed and fed into the grinding cylinder 1 through the feed port 17. The first drive motor 4 drives the grinding head 2 to rotate, generating relative rotation between it and the grinding base 3. The lead-zinc ore entering between the grinding head 2 and the grinding base 3 is gradually ground into fine particles. During the grinding process, the acid solution enters the ring pipe 5 through the acid solution pump pipe 7 and is evenly sprayed onto the surface of the lead-zinc ore through the nozzle 6. The lead-zinc ore reacts chemically with the acid solution to generate a salt solution. Gold and silver that do not react with the acid solution still fall as particles onto the top surface of the screen plate 8, thus completing the separation and recovery. Compared with the traditional method of grinding first and then separating, this device performs separation simultaneously during the grinding process, which not only improves working efficiency but also reduces energy consumption. Meanwhile, during the separation of associated gold and silver, the second drive motor 18 drives the half gear 15 to rotate. The half gear 15 rotates and intermittently meshes with the rack 14, driving the connecting plate 13 to move back and forth, which in turn drives the screen plate 8 to move back and forth laterally, thus dynamically screening the associated gold and silver. Compared with traditional vibrating screens, this device not only improves the screening effect and reduces clogging, but also avoids the problem of loud noise from vibrating motors and unstable equipment operation, further improving work efficiency. The entire device has a reasonable structural design and is easy to operate, enabling efficient and enhanced recovery of fine-grained associated gold and silver in lead-zinc ore.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grinding device for enhanced recovery of associated gold and silver from fine-grained lead-zinc ore, comprising a grinding cylinder and a grinding base, characterized in that, A grinding base is fixedly installed inside the grinding cylinder, and a grinding head is installed inside the grinding base. A ring pipe is fixedly mounted on the top of the grinding cylinder, and a nozzle is connected through the bottom surface of the ring pipe. A first drive motor is fixedly installed on the top surface of the grinding cylinder, and the output end of the first drive motor is fixedly connected to the top surface of the grinding head. An acid pumping pipe is connected through the ring pipe.

2. The grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore according to claim 1, characterized in that, Inside the grinding cylinder, a screen plate is arranged below the grinding base, and guide rods and connecting plates are fixedly connected to both ends of the screen plate, respectively. The guide rods and connecting plates both penetrate the grinding cylinder and are slidably connected to the grinding cylinder. A rack is fixedly installed on the surface of the connecting plate, and a second drive motor is fixedly installed on one side of the grinding cylinder between the racks. A half gear is installed at the output end of the second drive motor.

3. The grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore according to claim 2, characterized in that, A spring is sleeved on the outside of the guide rod, and the two ends of the spring are fixedly connected to the screen plate and the inner wall of the grinding cylinder, respectively.

4. The grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore according to claim 1, characterized in that, The top surface of the grinding cylinder is connected to a feeding port, and the front surface of the grinding cylinder is hinged to a collection door.

5. A grinding device for enhanced recovery of associated gold and silver from fine-grained lead-zinc ore as described in claim 2, characterized in that, The sieve plates are arranged in two sets from top to bottom, and the surface of the sieve plates is densely covered with sieve holes.

6. The grinding device for enhanced recovery of associated gold and silver in fine-grained lead-zinc ore according to claim 1, characterized in that, A discharge pipe is connected through the bottom surface of the grinding cylinder.

7. A grinding device for enhanced recovery of associated gold and silver from fine-grained lead-zinc ore as described in claim 2, characterized in that, A material collection plate is fixedly installed on the inner wall of the grinding cylinder, and the bottom surface of the material collection plate slides against the top surface of the screen plate.

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