A large particle copper matte interception and anti-blocking device in a copper matte water quenching granulation tower

Abstract

The utility model discloses a kind of large-particle ice-copper interception and anti-blocking device in granulation tower of water quenching ice-copper, the device includes two-stage grating structure and anti-blocking air pipe system, for efficiently intercepting the large block ice-copper with particle size greater than 30mm, and preventing grating from being blocked, ensuring that the ice-copper particle size entering rotary drum is uniform and controllable. The utility model solves the problem of rotary drum screen damage caused by the particle size of water-quenched ice-copper discharged from the existing granulation tower not meeting the standards, and optimizes the grating discharge by high-pressure airflow disturbance, improves system stability, and is suitable for high-temperature, strong corrosion and high-wear ice-copper granulation conditions.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal smelting equipment technology, and more specifically to a device for intercepting and preventing blockage of large-particle copper matte in a copper matte water quenching granulation tower. Background Technology

[0002] In existing copper matte granulation processes, high-temperature molten copper matte is typically granulated by water quenching to produce solid particles of 1–8 mm. However, the following technical challenges exist in actual production: 1. Incomplete granulation leads to the formation of large-particle matte: Factors such as matte grade, flow rate, temperature, and water quenching angle can easily produce a small amount of insufficiently granulated matte with a particle size of 20-30mm. Simultaneously, large-particle matte larger than 30mm formed at the end of the chute due to cooling and adhering to the walls can be shaken off into the circulating water pool inside the tower by the explosive force of water quenching. If not effectively isolated, these large particles will enter the rotating drum screen with the circulating water, causing screen damage and severely affecting the stable operation of subsequent equipment.

[0003] 2. Strong corrosion and equipment wear: During water quenching, the temperature inside the granulation tower exceeds 80°C. Under high temperature conditions, sulfur dioxide gas reacts with water to generate sulfuric acid, making the circulating water acidic and exacerbating the corrosion of the equipment inside the granulation tower. In addition, the explosive impact during the water quenching process and the continuous scouring by high-speed copper matte particles place extremely high demands on the strength, corrosion resistance, and wear resistance of the materials inside the tower. Conventional materials are difficult to adapt to such harsh working conditions.

[0004] Existing technologies lack efficient methods for separating large-particle copper matte, and the materials inside the tower have insufficient corrosion and wear resistance, resulting in short equipment life, high maintenance costs, and poor production continuity. Therefore, those skilled in the art urgently need to develop a solution for granulation tower internal components that can reliably intercept large-particle copper matte and possess acid corrosion resistance, impact resistance, and wear resistance to ensure long-term stable operation of the system. Utility Model Content

[0005] In view of this, the present invention provides a device for intercepting and preventing clogging of large-particle copper matte in a copper matte water-quenching granulation tower. This device includes a two-stage grid structure and an anti-clogging duct system, used to efficiently intercept large copper matte particles larger than 30mm and prevent grid clogging, ensuring that the copper matte particles entering the drum have a uniform and controllable particle size. This invention solves the problem of drum screen damage caused by substandard copper matte particle size discharged from existing granulation towers. Simultaneously, it optimizes grid discharge through high-pressure airflow disturbance, improving system stability and making it suitable for copper matte granulation conditions involving high temperature, strong corrosion, and high wear.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A device for intercepting and preventing clogging of large-particle copper matte in a copper matte water quenching granulation tower, comprising: A granulation tower, wherein a granulation head for spraying granulated water, a matte discharge chute head for discharging molten matte, and a circulating water pipe for discharging circulating water are installed on one side wall of the granulation tower. The granulation head is located below the matte discharge chute head, and the circulating water pipe is located below the granulation head and at the bottom of the granulation tower. The bottom of the other side wall of the granulation tower has a mixed fluid outlet. A primary grid is fixed to the bottom of the granulation tower and located below the granulation head. The primary grid is used to isolate copper matte particles with a diameter greater than 30 mm on the primary grid. A secondary cage-shaped grid is fixed to the bottom of the granulation tower and completely covers the front end of the mixed fluid outlet. The secondary cage-shaped grid is used to isolate copper matte particles with a diameter greater than 20 mm on the outside of the secondary cage-shaped grid. An anti-clogging duct is arranged inside the granulation tower. The air inlet of the anti-clogging duct is connected to an external air source, and the air outlet of the anti-clogging duct is arranged facing the front of the secondary cage grille. It is used to continuously blow the front area of ​​the secondary cage grille to prevent copper matte from accumulating and clogging the secondary cage grille.

[0007] Furthermore, the anti-clogging duct includes: The main air inlet pipe is fixed to one side wall of the granulation tower and located above the matte discharge chute head. One end of the main air inlet pipe is an air inlet and extends out of the granulation tower. The diversion pipe is fixed to the top surface of the primary grille, and the other end of the diversion pipe is fixed and connected to the main air inlet pipe. Branch ducts, wherein multiple branch ducts are arranged at intervals, one end of each branch duct is fixed and connected to the diversion pipe, and the other end of each branch duct is fixed with a jet nozzle for blowing air towards the secondary cage grille.

[0008] Furthermore, the multiple branch ducts are arranged in a fan-shaped array.

[0009] Furthermore, the portion of the main air inlet pipe located outside the granulation tower is equipped with a flow regulating valve.

[0010] Furthermore, the primary grille is supported by support columns.

[0011] Furthermore, the grid spacing of the primary grid is 30mm, and the grid spacing of the secondary cage grid is 20-25mm.

[0012] Furthermore, the primary grille, the secondary cage grille, and the anti-clogging air duct are all made of 316L stainless steel, and their outer walls are coated with an anti-corrosion layer.

[0013] This invention, through the synergistic effect of a secondary grid and an anti-clogging duct, can almost 100% intercept copper matte particles larger than 30mm, while controlling the throughput of 20-30mm particles to below 10%. Simultaneously, continuous high-pressure airflow effectively prevents copper matte accumulation and blockage of the secondary cage grid, accelerates the passage of qualified copper matte through the secondary cage grid, and avoids blockage at the mixed fluid outlet, thus achieving continuous and stable operation of the granulation tower. Furthermore, the primary grid, secondary cage grid, and anti-clogging duct of this invention are all made of 316L stainless steel, and their outer walls are coated with an anti-corrosion layer, improving the corrosion resistance of the internal equipment of the granulation tower and extending its service life.

[0014] Therefore, this utility model solves the technical problems in the prior art, such as damage to the drum screen caused by large copper matte particles, corrosion resistance of corresponding equipment inside the granulation tower, and blockage of the mixed fluid outlet of the granulation tower. It has the characteristics of high interception efficiency, strong corrosion resistance, and stable operation, and is particularly suitable for copper matte water quenching granulation system under high temperature and strong corrosion conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This utility model provides a structural schematic diagram of a device for intercepting and preventing blockage of large-particle copper matte in a copper matte water quenching granulation tower.

[0017] Figure 2 A top view diagram of the air duct and secondary cage-shaped grille to prevent blockage. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] This invention addresses the technical problems of existing copper matte water quenching granulation towers, such as low interception efficiency of large-particle copper matte, easy grid clogging, and severe equipment corrosion. It provides a composite device integrating two-stage grid interception and pneumatic anti-clogging. Through innovative structural design and material selection, it achieves efficient separation of large-particle copper matte and stable system operation.

[0020] like Figures 1-2 As shown in the figure, this utility model embodiment discloses a device for intercepting and preventing clogging of large-particle copper matte in a copper matte water quenching granulation tower, comprising: Granulation tower 1, with a granulation head 3 for spraying granulation water, a matte discharge chute head 4 for discharging matte liquid, and a circulating water pipe 5 for discharging circulating water installed on one side wall of granulation tower 1. The granulation head 3 is located below the matte discharge chute head 4, and the circulating water pipe 5 is located below the granulation head 3 and at the bottom of granulation tower 1. The bottom of the other side wall of granulation tower 1 has a mixed fluid outlet 6. The primary grid 7 is fixed at the bottom of the granulation tower 1 and located below the granulation head 3. The primary grid 7 is used to isolate copper matte particles larger than 30mm in diameter on the primary grid 7. Specifically, the primary grid 7 is made with a diameter about 20mm smaller than the granulation tower to facilitate the installation and fixation of the grid. The primary grid 7 is made of 316L stainless steel, and the cross-section of the primary grid is a semi-circular structure, laid flat directly below the granulation head 3, with a grid spacing of 30mm and a thickness of 80mm. The bottom of the grid is supported by two stainless steel support columns welded to the bottom of the granulation tower, and the arc-shaped edge where the grid meets the inner wall of the granulation tower is welded and fixed with extended stiffeners to keep the grid structure stable and reliable. Therefore, the primary grid 7 can completely isolate the insufficiently granulated copper matte and large copper matte particles larger than 30mm formed by cooling and hanging on the wall at the end of the chute on the surface of the primary grid 7. The secondary cage grid 8 is fixed at the bottom of the granulation tower 1 and completely covers the front end of the mixed fluid outlet 6, forming an all-round surrounding structure for the mixed fluid outlet 6. The secondary cage grid 8 is used to isolate copper matte particles with a diameter greater than 20mm on the outside of the secondary cage grid. Specifically, the secondary cage grid 8 is made of 316L stainless steel with a cage structure and a grid spacing of 20-25mm. During installation, it is welded to the bottom and inner wall of the granulation tower by means of extension ribs, that is, the structure is fixed by welding to ensure stability. Anti-clogging duct 9 is arranged inside granulation tower 1. The air inlet of anti-clogging duct 9 is connected to an external air source (the external air source can be connected from the main miscellaneous air steam package, providing a continuous airflow of 0.5 to 0.8 MPa). The air outlet of anti-clogging duct 9 is arranged facing the front of the secondary cage grille 8, and is used to continuously blow the front area of ​​the secondary cage grille 8 to prevent copper matte from accumulating and clogging the secondary cage grille 8.

[0021] Anti-clogging duct 9 includes: The main air inlet pipe 91 is made of 316L stainless steel with an outer diameter of 89mm and a wall thickness of 5mm. The main air inlet pipe 91 is fixed on one side wall of the granulation tower 1 and located above the copper matte discharge chute head 4. One end of the main air inlet pipe 91 is the air inlet 911, and this end extends out of the granulation tower 1. Diverter pipe 92 is the same size as the main air inlet pipe 91, and the diverter pipe 92 is fixed on the top surface of the first-stage grille 7. The other end of the diverter pipe 92 is fixed and connected to the main air inlet pipe 91. Branch ducts 93 have an outer diameter of 42mm and a wall thickness of 3mm. Multiple branch ducts 93 are arranged at intervals. One end of each branch duct 93 is fixed and connected to the diversion duct 92. The other end of each branch duct 93 is fixed with a jet nozzle 94 for blowing air towards the secondary cage grille 8. The outlet of the jet nozzle 94 adopts a variable diameter design of 42mm large diameter and 32mm small diameter, which can be used to enhance the airflow disturbance effect and prevent the secondary cage grille from being blocked. The outlet of the duct is arranged at a 30° angle to the front of the secondary cage grille.

[0022] Multiple branch ducts are arranged in a 20° fan-shaped array.

[0023] A triangular reinforcing rib with a height of 15mm is provided at the connection between the branch duct 93 and the diversion duct 92.

[0024] The portion of the main air inlet pipe 91 located outside the granulation tower 1 is equipped with a flow regulating valve 10 (regulation accuracy ±0.5%) to control the outlet flow and pressure to adapt to different operating conditions.

[0025] The primary grille 7, the secondary cage grille 8, and the anti-clogging air duct 9 are all made of 316L stainless steel (Cr 16~18%, Ni 10~14%, Mo 2~3%), and their outer walls are all coated with a 2mm thick PTFE anti-corrosion coating.

[0026] This device is suitable for highly corrosive granular metallurgical processes with temperatures between 80℃ and 90℃ and SO2 concentrations exceeding 500ppm. Its overall wear resistance is more than five times that of conventional materials, and the maintenance cycle is extended to 36 months.

[0027] 1. Installation process of this utility model 1.1 Pre-installation preparations Use a laser rangefinder or steel tape measure to accurately measure the installation position of the copper matte water quenching granulation tower, determine the installation hole position of the main air inlet pipe 91, and ensure that the deviation is ≤5mm.

[0028] Check the material certification documents of all components to ensure that the composition of the 316L stainless steel meets the design requirements (Cr 16-18%, Ni 10-14%, Mo 2-3%).

[0029] Prepare welding equipment (TIG welding machine), air tightness tester, anti-corrosion coating spraying equipment, etc.

[0030] 1.2 Installation of the Secondary Barrier System Installation of the first-stage fixed grille 7: The pre-fabricated 316L stainless steel primary grating with a semi-circular cross-section (30mm grid spacing, 80mm thickness) is laid flat directly below the granulation head and fixed to a suitable position above the tower bottom by two support columns. Extended stiffeners (10mm thickness) are used to weld the curved edges of the grating to the inner wall of the granulation tower, ensuring a weld strength ≥200MPa.

[0031] Second-stage cage-shaped grille 8 installation: A cage-shaped grid (grid spacing 20-25mm) is welded at the outlet of the granulation tower mixed fluid. It is fixed to the bottom and inner wall of the tower body by stiffening plates. The arc-shaped edge of the grid is also welded to the inner wall of the granulation tower to ensure that the welding strength is ≥200MPa and to ensure that a fully enclosed structure is formed at the outlet of the granulation tower mixed fluid.

[0032] 1.3 Installation of anti-clogging duct system Installation of main air inlet duct 91: A hole (94mm in diameter, 5mm larger than the outer diameter of the main air inlet pipe of 89mm) is made in the side wall of the tower body, the main air inlet pipe is inserted and the centerline deviation is adjusted to ≤5mm. The flow regulating valve 10 is connected to the main air inlet pipe 91 by a flange seal. After connecting to the external air supply system, a 0.8MPa air tightness test is performed, and no leakage is found after holding the pressure for 10 minutes.

[0033] Installation of diversion duct 92 and branch duct 93: The three pre-fabricated branch ducts 93 are welded to the horizontal diversion pipe 92 in a fan-shaped array at a 20° angle, and 15mm high triangular reinforcing ribs are welded at the connection. The air nozzle at the duct outlet is welded to the bottom of the granulation tower through a rib plate to ensure that the air nozzle at the duct outlet is arranged at a 30° angle with the front of the cage-shaped grid. After welding, compressed air is introduced to test the airflow coverage.

[0034] Gas supply unit commissioning: Connect the main and auxiliary air / steam generators and adjust the flow regulating valve (±0.5% accuracy) to ensure that the output pressure is adjustable from 0.5 to 0.8 MPa.

[0035] 1.4 Construction of Auxiliary Systems Corrosion protection treatment: After sandblasting and rust removal of the primary grille 7, secondary cage grille 8, and anti-clogging air duct 9, a 2mm thick PTFE coating is applied. After curing, the adhesion is tested to be ≥5MPa.

[0036] 2. The process of using this utility model Start-up phase: Turn on the air supply unit, adjust the flow regulating valve to the initial pressure of 0.6MPa, and observe whether the airflow from the jet nozzle evenly covers the front grille area of ​​the outlet (coverage rate ≥95%).

[0037] Operation phase: After water quenching, the granulated copper matte (temperature ≥80℃) is filtered. Large particles (>30mm) are intercepted by the primary grid, while particles of 20-30mm are filtered by the secondary cage grid. The granulated copper matte and the circulating water are mixed and discharged from the granulation tower through the mixed fluid outlet.

[0038] High-pressure airflow (0.5-0.8 MPa) is ejected from the jet nozzle and continuously blows across the front area of ​​the secondary cage grid to prevent copper matte from accumulating and clogging the secondary cage grid.

[0039] Maintenance and monitoring: Check the grating wear weekly (corrosion rate ≤ 0.15 mm / year), and recoat the PTFE coating monthly.

[0040] Regularly inspect the duct system on-site, and replace any blocked or damaged ducts immediately.

[0041] 3. Effects of the embodiments of this utility model Interception efficiency: Actual test results show that the interception rate of particles >30mm is basically 100%, while the throughput of particles between 20 and 30mm is <5%.

[0042] Anti-clogging performance: No clogging after 300 days of continuous operation, a significant improvement over traditional single-stage grilles (which require weekly cleaning).

[0043] Corrosion resistance: Under operating conditions of pH=5 and SO2 concentration of 800ppm, the corrosion rate of the 316L+PTFE composite structure is only 0.12mm / year.

[0044] The main effects of this utility model are: (1) This utility model is the first to create a two-stage gradient interception structure. Through the synergistic effect of the first-stage grid 7 and the second-stage cage grid 8, a gradient interception of large-sized copper matte particles can be formed. With the synergistic effect of the anti-clogging duct system, copper matte particles with a diameter greater than 30mm are isolated on the first-stage grid, and copper matte particles with a diameter greater than 20mm are isolated outside the second-stage cage grid. Large-sized copper matte particles are periodically removed from the granulation tower to achieve particle size classification control. The interception rate of particles >30mm is basically 100%, and the pass rate of particles 20-30mm is <5%.

[0045] (2) Develop a high-pressure pneumatic continuous purging cleaning system. High-pressure airflow (0.5-0.8MPa) is ejected from nozzle 94 and continuously purges the secondary cage grid to accelerate the passage rate of copper matte particles and prevent copper matte from accumulating and clogging the secondary cage grid. An optimized fan-shaped duct layout (20° uniform distribution) is adopted to achieve an airflow coverage rate of over 95% at the mixing fluid outlet 6 of the granulation tower. (3) The primary grid 7, the secondary cage grid 8, and the anti-clogging air duct 9 all adopt a composite protection scheme of 316L stainless steel and anti-corrosion coating. In an acidic environment of 4≤pH≤6, the corrosion rate is reduced to 0.15mm / year and the wear resistance is increased by 5 times.

[0046] Therefore, this invention solves the technical bottleneck of insufficient interception efficiency (<50%) of traditional single-stage bar screens; avoids unplanned downtime caused by bar screen blockage (allowing continuous operation for more than 360 days); significantly extends equipment life, with the expected maintenance cycle extended from 6 months to 30 months; reduces overall energy consumption by 2%, saving approximately RMB 1 million per set in annual production costs. This invention is particularly suitable for handling highly corrosive copper matte granulation chemical conditions with temperatures between 80℃ and 90℃ and SO2 concentrations exceeding 500ppm.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower, characterized in that, include: Granulation tower (1), on one side wall of the granulation tower (1) are installed a granulation head (3) for spraying granulated water, a matte discharge chute head (4) for discharging matte liquid, and a circulating water pipe (5) for discharging circulating water. The granulation head (3) is located below the matte discharge chute head (4), and the circulating water pipe (5) is located below the granulation head (3) and at the bottom of the granulation tower (1). The bottom of the other side wall of the granulation tower (1) has a mixed fluid outlet (6). A primary grid (7) is fixed at the bottom of the granulation tower (1) and located below the granulation head (3). The primary grid (7) is used to isolate copper matte particles with a diameter greater than 30 mm on the primary grid (7). Secondary cage grid (8), the secondary cage grid (8) is fixed at the bottom of the granulation tower (1) and completely covers the front end of the mixed fluid outlet (6). The secondary cage grid (8) is used to isolate copper matte particles with a diameter greater than 20 mm outside the secondary cage grid. Anti-clogging duct (9) is arranged inside the granulation tower (1). The air inlet of the anti-clogging duct (9) is connected to an external air source. The air outlet of the anti-clogging duct (9) is arranged facing the front of the secondary cage grille (8) to continuously blow the front area of ​​the secondary cage grille (8) and prevent copper ash from accumulating and clogging the secondary cage grille (8).

2. The device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower according to claim 1, characterized in that, The anti-clogging duct (9) includes: The main air inlet pipe (91) is fixed on one side wall of the granulation tower (1) and located above the matte discharge chute head (4). One end of the main air inlet pipe (91) is an air inlet (911) and extends out of the granulation tower (1). Diverter pipe (92), the diverter pipe (92) is fixed on the top surface of the primary grille (7), and the diverter pipe (92) is fixed and connected to the other end of the main air inlet pipe (91); Branch ducts (93) are arranged in multiple spaced intervals, one end of which is fixed and connected to the diversion pipe (92), and the other end of each branch duct (93) is fixed with a jet nozzle (94) for blowing air towards the secondary cage grille (8).

3. The device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower according to claim 2, characterized in that, Multiple branch ducts (93) are arranged in a fan-shaped array.

4. The device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower according to claim 2, characterized in that, The portion of the main air inlet pipe (91) located outside the granulation tower (1) is equipped with a flow regulating valve (10).

5. A device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower according to any one of claims 1-4, characterized in that, The primary grille (7) is supported by a support column (11).

6. A device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower according to any one of claims 1-4, characterized in that, The grid spacing of the primary grid (7) is 30 mm, and the grid spacing of the secondary cage grid (8) is 20-25 mm.

7. A device for intercepting and preventing blockage of large-particle copper matte in a copper matte water-quenching granulation tower according to any one of claims 1-4, characterized in that, The primary grille (7), the secondary cage grille (8), and the anti-clogging air duct (9) are all made of 316L stainless steel, and their outer walls are coated with an anti-corrosion layer.

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