Automatic slag washing device for rare earth slag discharge
The automated rare earth slag discharge device has solved the problems of low rare earth yield and unstable product quality in rare earth smelting, achieving high rare earth yield and stable product quality, reducing labor intensity and simplifying the operation process.
Patent Information
- Application Number
- CN202520442448.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-13
AI Technical Summary
In the existing rare earth smelting process, the single-tank washing process of rare earth water leaching residue results in low rare earth yield, unstable product quality, high labor intensity, and discontinuous semi-automatic residue washing process, leading to serious waste of resources.
An automated rare earth slag discharge device is adopted, including a filter press, slurry conditioning tank, buffer tank and continuous slag washing tank. Combined with radar level gauge, flow meter and pressure transmitter, etc., the device realizes automated control, ensures homogeneity of slurry and constant flow discharge, and adopts high shear stirring and "S" shaped material flow path to improve rare earth yield and product quality.
This has resulted in increased rare earth yield and improved product quality stability, while reducing labor intensity, simplifying operational procedures, and minimizing resource waste.
Smart Images
Figure CN223887496U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of rare earth hydrometallurgical separation production equipment, specifically to an automatic slag washing device for rare earth slag discharge. Background Technology
[0002] In the rare earth smelting and separation sector, the Bayan Obo rare earth concentrate in Baotou is a mixed rare earth ore of bastnaesite and monazite, which is recognized worldwide as a difficult-to-smelt mineral. The commonly used smelting processes are concentrated sulfuric acid high-temperature enhanced roasting and water leaching process and caustic soda conversion process. The concentrated sulfuric acid high-temperature enhanced roasting and water leaching process is widely used in northern mines for wet separation due to its low cost and low rare earth concentrate grade requirements. After the rare earth roasted ore is water-leached, in order to improve the rare earth yield, the water-leached residue is generally washed multiple times to continue to recover rare earth. Since the rare earth water-leached residue is acidic and has a high content of soluble impurities, the industry generally adopts a single-tank residue washing process. With the advancement of technology, some enterprises have gradually begun to explore semi-automatic residue washing processes, but the process continuity is poor, the water-leached liquid has large fluctuations in non-rare earth impurities, the rare earth content is not uniform, the product quality is difficult to guarantee, and the rare earth content in the slag is high, resulting in serious resource waste. To reduce the rare earth content in the slag, the water-leached slag needs to be washed multiple times, which makes the process lengthy, complex, and labor-intensive. Utility Model Content
[0003] The purpose of this invention is to provide an automatic slag washing device for rare earth slag discharge, which effectively improves the quality of the water-leached solution product, reduces labor intensity, and increases the rare earth yield through automatic slag washing. This solves the problems mentioned in the background art.
[0004] The technical solution adopted in this utility model is as follows:
[0005] An automatic slag washing device for rare earth slag discharge includes a filter press body 2 and a slag collection pipe 3. The filter press body 2 is connected to the inlet of a slurry mixing tank 5 through the slag collection pipe 3. A washing water pipe 4 is also connected to the inlet of the slurry mixing tank 5. The outlet of the slurry mixing tank 5 is connected to the inlet of a buffer tank 7 through a discharge pipe 6. The outlet of the buffer tank 7 is connected to the inlet of a continuous slag washing tank 9 through a slurry discharge pipe 8. A low-level tank 10 is provided below the slag washing tank outlet 93 at the end of the continuous slag washing tank 9. The outlet of the low-level tank 10 is connected to the slurry discharge pipe through a mixing and feeding pump 103.
[0006] The washing water pipe 4 is equipped with a washing water flow meter 41 and a washing water actuation valve 42. The washing water flow meter 41 and the washing water actuation valve 42 are connected to the filter press pressure holding signal source 1 set on the filter press body 2. The filter press pressure holding signal source 1 is used to count the number of times the filter press body 2 is unloaded and send a signal to the washing water actuation valve 42.
[0007] The discharge pipe 6 is equipped with a slurry discharge ball valve 61, a slurry discharge actuator valve 62, and a slurry mixing and discharging pump 63.
[0008] The slurry mixing tank 5 is equipped with a radar level gauge 51 and a slurry mixing agitator 52. The radar level gauge 51 is connected to the slurry discharge ball valve 61, the slurry discharge actuator valve 62, and the slurry mixing and feeding pump 63.
[0009] The slurry discharge pipe 8 is equipped with a slurry flow meter 81, a slurry flow control valve 82, and a buffer pump 83.
[0010] The buffer tank 7 is equipped with a pressure transmitter 71 and a buffer agitator 72. The pressure transmitter 71 is connected to the slurry flow meter 81 and the slurry flow actuator 82.
[0011] The low-level tank 10 is equipped with a low-level tank level gauge 102 and a low-level tank agitator 101. The low-level tank level gauge 102 is connected to the mixing and feeding pump 103.
[0012] The continuous slag washing tank 9 is equipped with a slag washing tank partition 91 and a slag washing agitator 92.
[0013] The filter press body 2 is provided in several sets, and each set of filter press body 2 is connected to a slurry conditioning tank 5 through a slag collection pipe 3.
[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0015] 1. This utility model utilizes the original pressure-maintaining signal source of the filter press, configures a wash water pipeline, and solves the problem of determining the solid-liquid ratio of the slurry based on experience by setting up a radar level gauge linkage. Since the filter press discharges filter cake, the high-shear agitation effectively breaks up the filter cake and efficiently forms a homogeneous slurry with the wash water.
[0016] 2. The buffer tank set in this utility model uses a pressure transmitter, in conjunction with a flow meter, actuator and other equipment to discharge slurry at a constant flow rate, which ensures the stability of the material in the subsequent slag washing process.
[0017] 3. The continuous slag washing tank of this utility model adopts a double-layer four-blade paddle agitator to efficiently wash rare earth in the slag. The adjacent baffles are installed above and below, and the material flows in an "S" shaped path, which improves the utilization rate of the equipment. The low-level tank adopts a two-stage integrated structure to prevent slurry stratification, homogenize the slurry composition, and ensure continuous and smooth discharge.
[0018] 4. This utility model has a high degree of automation and can achieve unattended operation. All agitators and feeding pumps are frequency converter controlled. The pressure holding signal, flow meter, radar level gauge, pressure transmitter and other devices transmit the actual detection values to the computer terminal. The computer terminal adjusts the actuator and feeding pump frequency and start and stop according to the data linkage, thereby achieving the purpose of automatic slag washing, reducing labor intensity and improving rare earth yield.
[0019] In summary, this utility model can effectively improve the quality of water-leached liquid products, reduce labor intensity, increase rare earth yield, and facilitate widespread use through automatic slag washing. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the impeller section of the slurry mixing agitator of this utility model;
[0022] In the diagram: 1. Pressure holding signal source for filter press; 2. Filter press body; 3. Slag collection pipe; 4. Washing water pipe; 41. Washing water flow meter; 42. Washing water actuator valve; 5. Slurry mixing tank; 51. Radar level gauge; 52. Slurry mixing agitator; 6. Discharge pipe; 61. Slurry discharge ball valve; 62. Slurry discharge actuator valve; 63. Slurry mixing and feeding pump; 7. Buffer tank; 71. Pressure transmitter; 72. Buffer agitator; 8. Slurry discharge pipe; 81. Slurry flow meter; 82. Slurry flow actuator valve; 83. Buffer feeding pump; 9. Continuous slag washing tank; 91. Slag washing tank baffle; 92. Slag washing agitator; 93. Slag washing tank outlet; 10. Low-level tank; 101. Low-level tank agitator; 102. Low-level tank level gauge; 103. Mixing and feeding pump. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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.
[0026] Example 1
[0027] like Figure 1 This embodiment provides an automatic slag washing device for rare earth slag discharge, including a filter press body 2 and a slag collection pipe 3. The filter press body 2 is equipped with a pressure-maintaining signal source 1. The filter press body 2 is connected to the inlet of the slurry tank 5 through the slag collection pipe 3. A washing water pipe 4 is also connected to the inlet of the slurry tank 5. The outlet of the slurry tank 5 is connected to the inlet of the buffer tank 7 through the discharge pipe 6. The outlet of the buffer tank 7 is connected to the inlet of the continuous slag washing tank 9 through the slurry discharge pipe 8. A low-level tank 10 is provided below the slag washing tank outlet 93 at the end of the continuous slag washing tank 9. The outlet of the low-level tank 10 is connected to the slurry discharge pipe through a pipe and a mixing and feeding pump 103.
[0028] The filter press body 2 is provided in several sets, and each set of filter press body 2 is connected to a slurry conditioning tank 5 through a slag collection pipe 3.
[0029] A wash water flow meter 41 and a wash water actuator valve 42 are installed on the wash water pipe 4. The wash water flow meter 41 and the wash water actuator valve 42 are connected to the filter press pressure signal source 1 installed on the filter press body 2. The filter press pressure signal source 1 is used to count the number of times the filter press body 2 unloads plates and send signals to the wash water actuator valve 42. After the wash water actuator valve 42 collects the corresponding number of times counted by the pressure signal source 1 according to the process requirements, the wash water actuator valve 42 opens, and the wash water enters the sludge washing tank 5 through the wash water flow meter 41 at a specified flow rate.
[0030] The discharge pipe 6 is equipped with a slurry discharge ball valve 61, a slurry discharge actuator valve 62, and a slurry mixing and discharging pump 63.
[0031] The slurry preparation tank 5 is equipped with a radar level gauge 51 and a slurry mixing agitator 52. The radar level gauge 51 is connected to the slurry discharge ball valve 61, the slurry discharge actuator valve 62, and the slurry mixing and feeding pump 63. When the radar level gauge 51 detects that the liquid level is higher than the upper edge of the agitator, the high-shear slurry mixing agitator 52 is started. When the radar level gauge 51 detects that the liquid level has reached the set value, the radar level gauge 53 collects a time signal, and the computer terminal starts timing. After the computer terminal has timed for a certain period of time, the slurry discharge ball valve 61 is opened through the slurry discharge actuator valve 62, and then the slurry mixing and feeding pump 63 is started to ensure sufficient slurry preparation time.
[0032] like Figure 2 The slurry mixing 52 is a high-shear mixer, specifically including a drive motor, a rotating shaft, a central disk a, and high-shear blades b. The rotating shaft is connected to the output shaft of the drive motor, and the central disk a is fixedly installed on the bottom of the rotating shaft. Several high-shear blades b are fixedly installed on the central disk a.
[0033] The slurry discharge pipeline 8 is equipped with a slurry flow meter 81, a slurry flow control valve 82, and a buffer pump 83. The buffer tank 7 is equipped with a pressure transmitter 71 and a buffer agitator 72. The pressure transmitter 71 is signal-connected to the slurry flow meter 81 and the slurry flow control valve 82. To ensure a constant slurry flow rate, after optimization by the pressure transmitter 71, the slurry is fed at a constant flow rate according to the process setting value on the slurry flow meter 81 after being acted upon by the slurry flow control valve 82. The buffer pump 83 pumps the slurry from the pipeline into the continuous slag washing tank 9.
[0034] The low-level tank 10 is equipped with a low-level tank level gauge 102 and a low-level tank agitator 101. The low-level tank level gauge 102 is connected to the mixing and feeding pump 103. The low-level tank 10 adopts a bipolar agitator integrated tank mode to prevent slurry stratification, homogenize slurry composition, and ensure continuous and smooth discharge.
[0035] The continuous slag washing tank 9 is equipped with a slag washing tank baffle 91, and a slag washing agitator 92 is installed on the continuous slag washing tank 9. The continuous slag washing tank 9 consists of m stages of slag washing tanks, where m ≥ 2, that is, the number of slag washing tank baffles 9 ≥ 1. The adjacent stages of the slag washing tank baffles 91 are staggered vertically to ensure that the material flows along an "S" path; the slag washing agitator 92 is a double-layer paddle agitator, with four paddles in each layer; the slag washing tank outlet 93 is located at the upper end of the continuous slag washing tank 9, below the upper edge of the slag washing tank baffle 91 with its upper opening.
[0036] This invention features a high degree of automation, enabling unattended operation. All agitators and feeding pumps are frequency converters. Devices such as pressure holding signals, flow meters, radar level gauges, and pressure transmitters transmit actual detection values to a computer terminal. The computer terminal adjusts the actuators and feeding pump frequencies and starts / stops based on the data, thereby achieving automatic slag washing, reducing labor intensity, and increasing rare earth yield.
Claims
1. An automatic slag washing device for rare earth slag discharge, comprising a filter press body (2) and a slag collection pipe (3), characterized in that, The filter press body (2) is connected to the inlet of the slurry tank (5) through the slag collection pipe (3). The inlet of the slurry tank (5) is also connected to the washing water pipe (4). The outlet of the slurry tank (5) is connected to the inlet of the buffer tank (7) through the discharge pipe (6). The outlet of the buffer tank (7) is connected to the inlet of the continuous slag washing tank (9) through the slurry discharge pipe (8). A low-level tank (10) is set below the outlet (93) of the slag washing tank at the end of the continuous slag washing tank (9). The outlet of the low-level tank (10) is connected to the slurry discharge pipe through the mixing pump (103).
2. The automatic slag washing device for rare earth slag discharge according to claim 1, characterized in that: The washing water pipe (4) is equipped with a washing water flow meter (41) and a washing water actuator valve (42). The washing water flow meter (41) and the washing water actuator valve (42) are connected to the filter press pressure signal source (1) set on the filter press body (2). The filter press pressure signal source (1) is used to count the number of times the filter press body (2) unloads plates and send a signal to the washing water actuator valve (42).
3. The automatic slag washing device for rare earth slag discharge according to claim 1, characterized in that: The discharge pipe (6) is equipped with a slurry discharge ball valve (61), a slurry discharge actuator valve (62), and a slurry mixing and discharging pump (63).
4. The automatic slag washing device for rare earth slag discharge according to claim 3, characterized in that: The slurry tank (5) is equipped with a radar level gauge (51) and a slurry agitator (52). The radar level gauge (51) is connected to the slurry discharge ball valve (61), the slurry discharge actuator valve (62), and the slurry mixing pump (63).
5. The automatic slag washing device for rare earth slag discharge according to claim 1, characterized in that: The slurry discharge pipe (8) is equipped with a slurry flow meter (81), a slurry flow control valve (82), and a buffer pump (83).
6. The automatic slag washing device for rare earth slag discharge according to claim 5, characterized in that: A pressure transmitter (71) and a buffer agitator (72) are installed on the buffer tank (7). The pressure transmitter (71) is connected to the slurry flow meter (81) and the slurry flow actuator (82).
7. The automatic slag washing device for rare earth slag discharge according to claim 1, characterized in that: The low-level tank (10) is equipped with a low-level tank level gauge (102) and a low-level tank agitator (101). The low-level tank level gauge (102) is connected to the mixing pump (103) via signal connection.
8. The automatic slag washing device for rare earth slag discharge according to claim 1, characterized in that: The continuous slag washing tank (9) is equipped with a slag washing tank baffle (91) and a slag washing agitator (92).
9. The automatic slag washing device for rare earth slag discharge according to claim 1, characterized in that: The filter press body (2) is provided in several sets, and each set of filter press body (2) is connected to a slurry tank (5) through a slag collection pipe (3).