Multi-dimensional slag detection device for oxygen pressure leaching of germanium-rich zinc concentrate

Abstract

The invention discloses a multi-dimensional slag detection device for oxygen pressure leaching of germanium-rich zinc concentrate, and relates to the technical field of intelligent sensors. Comprising a slag conveying part, a feeding port used for feeding slag is formed in the top of one side of the slag conveying part, a sampling port is formed in the bottom of one side of the slag conveying part, an empty cylinder is connected to the bottom of the sampling port, and a compaction part and a detection part are arranged on the two sides of the empty cylinder respectively; the detection part comprises a cavity frame arranged on one side of the empty cylinder and an intelligent sensing detection module arranged on the inner side of the cavity frame. Transverse conveying is carried out through the slag conveying part, sampling is carried out in the conveying process, cake pressing treatment is carried out after sampling, and then analysis is carried out through a confocal display imaging sensor, an X-ray synchronous excitation / receiving sensor and a laser Raman spectrum sensor of the intelligent sensing detection module. Therefore, the microscopic information about the composition and distribution of the key phase in the core solid product of the leaching residue and the occurrence state of the valuable metal can be directly obtained on line in situ.

Description

Technical Field

[0001] This invention relates to the field of intelligent sensor technology, and in particular to a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate. Background Technology

[0002] Oxygen pressure leaching of germanium-zinc concentrate is a key process for the efficient recovery of valuable metals such as zinc and germanium. The degree of reaction and selectivity of this process directly affect the metal recovery rate, the difficulty of subsequent purification, and the resource utilization of the leaching residue.

[0003] Currently, monitoring of the oxygen pressure leaching process in industrial production mainly relies on conventional process parameter sensors such as temperature, pressure, pH, and potential, as well as offline and delayed laboratory chemical analysis.

[0004] These methods can only reflect the macroscopic state of the reaction environment and cannot directly, online, or in situ obtain microscopic information about the composition, distribution, and occurrence state of valuable metals in key phases (such as unreacted sulfides, ferrates, and ferrous sulfate) in the core solid product, leaching residue.

[0005] Therefore, developing a sensing system capable of online, real-time analysis of multi-dimensional phase information of slag and directly serving intelligent process control has become an urgent need for optimizing oxygen pressure leaching technology and achieving precision smelting.

[0006] Therefore, this invention proposes a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate includes a slag conveying section. A feed inlet for slag feeding is provided on the top side of the slag conveying section, and a sampling port is provided on the bottom side of the slag conveying section. An empty cylinder is connected to the bottom of the sampling port, and a compaction section and a detection section are respectively provided on both sides of the empty cylinder.

[0010] The detection unit includes a cavity frame disposed on one side of the empty cylinder and an intelligent sensing detection module disposed inside the cavity frame. The intelligent sensing detection module includes:

[0011] A confocal display imaging sensor is used to acquire real-time morphological images of slag particles;

[0012] The X-ray synchronous excitation / receiving sensor includes a microfocus X-ray tube, a multi-capillary focusing lens, a silicon drift detector for collecting X-ray fluorescence (XRF), and a two-dimensional surface detector for collecting X-ray diffraction (XRD) signals, for synchronously exciting and acquiring elemental characteristic spectra and crystal diffraction information from the same micro-region of the sample.

[0013] A laser Raman spectroscopy sensor, with its optical path coaxial with that of a confocal display imaging sensor, is used to acquire molecular vibrational spectra in micro-regions.

[0014] A fill light, used for supplemental lighting.

[0015] Preferably: a through plate is fixed to the outer wall of the cavity frame near the empty cylinder, a "U"-shaped frame is fixed to the other side of the cavity frame, an expansion joint is fixed to the other side of the "U"-shaped frame, a fixing plate is fixed to the outer wall of the expansion joint by bolts, and the fixing plate is fixed to the bottom outer wall of the slag conveying part by bolts.

[0016] Furthermore: the slag conveying unit includes a main shaft, a spiral blade, and a conveying shell. The main shaft is rotatably connected to the inner wall of the conveying shell, the spiral blade is fixed to the outer wall of the main shaft, and a motor is fixed to the end of the conveying shell. The output shaft of the motor is fixed to the end of the main shaft.

[0017] Based on the aforementioned scheme: the outer wall of the slag conveying section at the sampling port is provided with a valve control section, the valve control section includes a rotating ring and a material passage hole opened on the side wall of the rotating ring and matching the sampling port, the rotating ring being rotatably connected to the outer wall of the conveying shell.

[0018] A better option in the aforementioned scheme is that the valve control unit further includes a second motor, which is fixed to the outer wall of the conveying shell by bolts. The output shaft of the second motor is connected to a gear by a key, and the outer wall of the rotating ring is provided with teeth that mesh with the outer wall of the gear.

[0019] As a further aspect of the present invention: multiple levers are fixed on the outer wall of the main shaft at the sampling port.

[0020] Meanwhile, the compaction section includes a pressure plate that matches the size of the inner cavity of the empty cylinder and a pusher head disposed on one side of the pressure plate. A second expansion joint is fixed on the other side of the pusher head. A second support plate is fixed to the outer wall of the second expansion joint by bolts. The second support plate is fixed to the bottom outer wall of the slag conveying section by bolts.

[0021] As a preferred embodiment of the present invention, a plurality of circular arrayed protrusions are fixed on one side of the pressure plate.

[0022] Meanwhile, the pusher head is movably inserted into the inner wall of the pressure plate, the inner wall of the pressure plate is provided with a spiral groove, and the outer wall of the pusher head is fixed with a limiting protrusion, which is movably limited and matched with the inner wall of the spiral groove.

[0023] As a preferred embodiment of the present invention, a spring is fastened to the opposite side of the pusher and the pressure plate.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention involves lateral conveying of slag through a slag conveying unit, sampling during the conveying process, followed by cake processing. Subsequently, analysis is performed using a confocal display imaging sensor, an X-ray synchronous excitation / receiving sensor, and a laser Raman spectroscopy sensor from an intelligent sensing and detection module. This enables direct, online, and in-situ acquisition of microscopic information regarding the composition, distribution, and valuable metal occurrence state of key phases in the core solid products of leaching slag.

[0026] 2. In this invention, by setting a valve control unit, the opening and closing of the sampling port can be controlled by the rotation of the rotating ring. This, in conjunction with the timing action of the second motor, enables periodic slag sampling. Furthermore, by using a lever, the slag at the sampling port can be loosened by moving it, ensuring the reliability of slag falling and sampling.

[0027] 3. The present invention, by setting a compaction section, can compress slag into a cake shape, thereby increasing the data acquisition accuracy of the intelligent sensing and detection module.

[0028] 4. In this invention, a rotatable convex plate is provided in the compaction section, which can rotate to transport the slag at the bottom upwards, preventing empty material at the top and increasing reliability. In addition, the rotation of the convex plate is achieved by the cooperation of the limiting protrusion and the spiral groove, and its power comes from the movement of the pusher, thereby simplifying the power and control logic. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall main structure of a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate proposed in this invention.

[0030] Figure 2 This is a schematic cross-sectional view of the multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate proposed in this invention.

[0031] Figure 3 This is a schematic diagram of the intelligent sensing and detection module architecture of a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate proposed in this invention.

[0032] Figure 4 This is a schematic diagram of the slag conveying section of a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate proposed in this invention.

[0033] Figure 5 This is a schematic diagram of the compaction section of a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate, as proposed in this invention.

[0034] Figure 6 This is a schematic diagram of the pusher and pressure plate connection structure of a multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate proposed in this invention.

[0035] In the diagram: 1. Slag conveying section; 2. Valve control section; 3. Feed inlet; 4. Compaction section; 5. Empty cylinder; 6. Sampling port; 7. Detection section; 8. Through plate; 9. Cavity frame; 10. Intelligent sensing and detection module; 11. "U" shaped frame; 12. Fixed plate one; 13. Expansion joint one; 14. Confocal display imaging sensor; 15. X-ray synchronous excitation / receiving sensor; 16. Laser Raman spectroscopy sensor; 17. Supplemental light; 18. Motor one; 19. Main shaft; 20. Spiral blade; 21. Conveying shell; 22. Through hole; 23. Lever; 24. Motor two; 25. Gear; 26. Tooth; 27. Rotary ring; 28. Expansion joint two; 29. ​​Support plate two; 30. Push head; 31. Pressure plate; 32. Spring; 33. Limiting protrusion; 34. Protruding plate; 35. Spiral groove. Detailed Implementation

[0036] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0037] Embodiments of the present invention 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 are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] Example 1:

[0039] A multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate, such as Figures 1-6 As shown, it includes a slag conveying section 1. A feed inlet 3 for slag feeding is provided on the top side of the slag conveying section 1, and a sampling port 6 is provided on the bottom side of the slag conveying section 1. An empty cylinder 5 is connected to the bottom of the sampling port 6, and a compaction section 4 and a detection section 7 are respectively provided on both sides of the empty cylinder 5.

[0040] The detection unit 7 includes a cavity frame 9 disposed on one side of the empty cylinder 5 and an intelligent sensing detection module 10 disposed inside the cavity frame 9. The intelligent sensing detection module 10 includes:

[0041] A confocal display imaging sensor 14 is used to acquire real-time morphological images of slag particles;

[0042] X-ray synchronous excitation / receiving sensor 15 includes a microfocus X-ray tube, a multi-capillary focusing lens, a silicon drift detector for collecting X-ray fluorescence (XRF), and a two-dimensional surface detector for collecting X-ray diffraction (XRD) signals, for synchronously exciting and acquiring elemental characteristic spectra and crystal diffraction information from the same micro-region of the sample.

[0043] The laser Raman spectroscopy sensor 16 is optically coaxial with the confocal display imaging sensor 14 and is used to acquire the molecular vibration spectrum of the micro-region.

[0044] Fill light 17, which is used for supplemental lighting.

[0045] A through plate 8 is fixed to the outer wall of the cavity frame 9 near the empty cylinder 5. A "U" shaped frame 11 is fixed to the other side of the cavity frame 9. An expansion joint 13 is fixed to the other side of the "U" shaped frame 11. A fixing plate 12 is fixed to the outer wall of the expansion joint 13 by bolts. The fixing plate 12 is fixed to the bottom outer wall of the slag conveying section 1 by bolts.

[0046] In use, slag enters the slag conveying section 1 through the inlet 3, is conveyed to the sampling port 6, and then enters the empty cylinder 5 through the sampling port 6. The compaction section 4 then compacts the slag into a round cake shape. Subsequently, the confocal display imaging sensor 14, X-ray synchronous excitation / receiving sensor 15, and laser Raman spectroscopy sensor 16 in the intelligent sensing and detection module 10 acquire data, which is then analyzed. The analysis process is as follows:

[0047] Data registration and feature alignment: Accurately register XRF elemental distributions, XRD diffraction information, Raman spectra, and optical images from the same time point and spatial region in the spatiotemporal dimension;

[0048] Pixel / micro-area level classification: Using a trained classification model, phase classification is performed on each registered pixel or micro-area, and the output includes, but is not limited to, pseudo-color images of phase distribution for "unreacted sulfide minerals such as sphalerite", "ferrates such as ZnFe2O4", "iron alum minerals", "elemental sulfur", and "gangue".

[0049] The steps for calculating the distribution rate of valuable metals are as follows: Based on the phase distribution diagram, calculate the average element content in each target phase region, thereby obtaining the distribution ratio of key valuable metals in different phases, and calculating the overall chemical phase residue rate.

[0050] This invention utilizes a slag conveying unit 1 for lateral transport, followed by sampling during the transport process. After sampling, the slag is pressed into cakes and then analyzed using the confocal display imaging sensor 14, X-ray synchronous excitation / reception sensor 15, and laser Raman spectroscopy sensor 16 of the intelligent sensing and detection module 10. This enables the direct, online, and in-situ acquisition of microscopic information regarding the composition, distribution, and valuable metal occurrence state of key phases in the core solid products of the leaching residue.

[0051] To solve the problems of delivery and sampling; such as Figure 2 As shown, the slag conveying unit 1 includes a main shaft 19, a spiral blade 20, and a conveying shell 21. The main shaft 19 is rotatably connected to the inner wall of the conveying shell 21, the spiral blade 20 is fixed to the outer wall of the main shaft 19, and a motor 18 is fixed to the end of the conveying shell 21. The output shaft of the motor 18 is fixed to the end of the main shaft 19.

[0052] The outer wall of the slag conveying section 1 located at the sampling port 6 is provided with a valve control section 2. The valve control section 2 includes a rotating ring 27 and a material passage hole 22 opened on the side wall of the rotating ring 27 and matched with the sampling port 6. The rotating ring 27 is rotatably connected to the outer wall of the conveying shell 21.

[0053] The valve control unit 2 also includes a second motor 24, which is fixed to the outer wall of the conveying shell 21 by bolts. The output shaft of the second motor 24 is connected to a gear 25 by a key, and the outer wall of the rotating ring 27 is provided with teeth 26 that mesh with the outer wall of the gear 25.

[0054] Furthermore, multiple levers 23 are fixed on the outer wall of the main shaft 19 located at the sampling port 6.

[0055] When slag enters the inner cavity of the conveying shell 21 through the feed inlet 3, the first motor 18 starts, which drives the main shaft 19 to rotate, thereby driving the spiral blades 20 to rotate. The rotating spiral blades 20 transport the slag entering the inner cavity of the conveying shell 21 laterally. When the sampling cycle is reached, the second motor 24 starts, which drives the gear 25 to rotate, thereby driving the rotating ring 27 to rotate through the teeth 26, so that the sampling port 6 coincides with the material passage hole 22. With the help of the lever 23, the laterally transported slag is subjected to gravity and falls into the empty cylinder 5 along the sampling port 6.

[0056] This device, by setting a valve control unit 2, can control the opening and closing of the sampling port 6 by rotating the rotating ring 27, thereby achieving periodic slag sampling in conjunction with the timing action of the electric motor 24. Furthermore, by using the lever 23, it can loosen the slag at the sampling port 6 to ensure the reliability of slag falling and sampling.

[0057] To solve the problem of pressing cakes; such as Figure 5As shown, the compaction section 4 includes a pressure plate 31 that matches the inner size of the empty cylinder 5 and a pusher 30 disposed on one side of the pressure plate 31. A telescopic device 28 is fixed on the other side of the pusher 30. A support plate 29 is fixed to the outer wall of the telescopic device 28 by bolts. The support plate 29 is fixed to the bottom outer wall of the slag conveying section 1 by bolts.

[0058] A plurality of circular array of protruding plates 34 are fixed on one side of the pressure plate 31.

[0059] The push head 30 is movably inserted into the inner wall of the pressure plate 31. The inner wall of the pressure plate 31 is provided with a spiral groove 35. The outer wall of the push head 30 is fixed with a limiting protrusion 33. The limiting protrusion 33 is movably limited and matched with the inner wall of the spiral groove 35. At the same time, a spring 32 is fastened to the opposite side of the push head 30 and the pressure plate 31.

[0060] When the sampled slag enters the inner cavity of the empty cylinder 5, the second telescopic device 28 extends, first driving the pusher 30 to move, which in turn drives the pressure plate 31 to move via the spring 32. The pressure plate 31 scrapes the slag in the inner cavity of the empty cylinder 5, and together with the through plate 8, it squeezes the slag into a cake shape. At the same time, due to the slag being subjected to gravity, it will spread out at the bottom of the empty cylinder 5. When the pressure plate 31 squeezes, there may be empty material at the top. However, when the pressure plate 31 is subjected to the reaction force of the squeeze, the pusher 30 will move axially relative to the pressure plate 31. This causes the pressure plate 31 to rotate through the action of the limiting protrusion 33 and the spiral groove 35, thereby conveying the slag at the bottom upward in a rotating manner through the protrusion 34 until it is compacted. After compaction, data is collected. After the data collection is completed, the first telescopic device 13 retracts, and the through plate 8 moves away from the empty cylinder 5. Then, the second telescopic device 28 extends further to push out the sample. Then, the first telescopic device 13 and the second telescopic device 28 reset, preparing for the next sampling.

[0061] This device, by setting a compaction section 4, can compress slag into a cake shape, thereby increasing the data acquisition accuracy of the intelligent sensing and detection module 10. At the same time, the compaction section 4 is equipped with a rotatable convex plate 34, which can rotate to transport the slag at the bottom upwards, preventing empty material at the top and increasing reliability. In addition, the rotation of the convex plate 34 is achieved by the cooperation of the limiting protrusion 33 and the spiral groove 35, and its power comes from the movement of the pusher 30, thereby simplifying the power and control logic.

[0062] In this embodiment, when slag enters the inner cavity of the conveying shell 21 through the inlet 3, motor 18 starts, driving the main shaft 19 to rotate, which in turn drives the spiral blades 20 to rotate. The spiral blades 20 rotate to laterally convey the slag entering the inner cavity of the conveying shell 21. When the sampling cycle is reached, motor 24 starts, driving gear 25 to rotate, which in turn drives the rotating ring 27 to rotate through the teeth 26, causing the sampling port 6 to coincide with the through hole 22. With the help of the lever 23, the laterally conveyed slag is caused by gravity to fall along the sampling port 6 into the empty cylinder 5 until the required sample volume is reached. Then, the rotating ring 27 rotates to close the sampling port 6, and the telescopic device 28 extends. It first drives the push head 30 to move, which in turn drives the pressure plate 31 to move through the spring 32. The pressure plate 31 scrapes the slag in the inner cavity of the empty cylinder 5, and with the help of the through plate 8, it squeezes the slag into a cake shape. Meanwhile, due to gravity, the slag will fall to the bottom of the empty cylinder 5. When the pressure plate 31 squeezes, there may be empty material at the top. However, when the pressure plate 31 is subjected to the reaction force of the squeeze, the pusher 30 will move axially relative to the pressure plate 31. Thus, the pressure plate 31 will rotate through the action of the limiting protrusion 33 and the spiral groove 35. The slag at the bottom will be rotated and conveyed upward through the convex plate 34 until it is compacted. After compaction, data is collected. After the collection is completed, the telescopic device 13 retracts, the through plate 8 moves away from the empty cylinder 5, and then the telescopic device 28 extends further to push out the sample. Then the telescopic device 13 and the telescopic device 28 reset to prepare for the next sampling. Subsequently, the confocal display imaging sensor 14, the X-ray synchronous excitation / receiving sensor 15, and the laser Raman spectroscopy sensor 16 in the intelligent sensing and detection module 10 collect data and analyze it.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate, comprising a slag conveying section (1), an inlet (3) for slag feeding is provided on the top side of the slag conveying section (1), a sampling port (6) is provided on the bottom side of the slag conveying section (1), an empty cylinder (5) is connected to the bottom of the sampling port (6), and a compaction section (4) and a detection section (7) are respectively provided on both sides of the empty cylinder (5), characterized in that, The detection unit (7) includes a cavity frame (9) disposed on one side of the empty cylinder (5) and an intelligent sensing detection module (10) disposed inside the cavity frame (9). The intelligent sensing detection module (10) includes: A confocal display imaging sensor (14) is used to acquire real-time morphological images of slag particles; The X-ray synchronous excitation / receiving sensor (15) includes a microfocus X-ray tube, a multi-capillary focusing lens, a silicon drift detector for collecting X-ray fluorescence (XRF), and a two-dimensional surface detector for collecting X-ray diffraction (XRD) signals, for synchronous excitation and acquisition of elemental characteristic spectra and crystal diffraction information from the same micro-region of the sample. The laser Raman spectroscopy sensor (16) is optically coaxial with the confocal display imaging sensor (14) and is used to acquire the molecular vibration spectrum of the micro-region; A fill light (17) is used for fill lighting.

2. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 1, characterized in that, The cavity frame (9) has a through plate (8) fixed on the outer wall near the cavity cylinder (5), and a "U" shaped frame (11) is fixed on the other side of the cavity frame (9). A telescopic device (13) is fixed on the other side of the "U" shaped frame (11). A fixing plate (12) is fixed on the outer wall of the telescopic device (13) by bolts. The fixing plate (12) is fixed to the bottom outer wall of the slag conveying part (1) by bolts.

3. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 1, characterized in that, The slag conveying unit (1) includes a main shaft (19), a spiral blade (20), and a conveying shell (21). The main shaft (19) is rotatably connected to the inner wall of the conveying shell (21). The spiral blade (20) is fixed to the outer wall of the main shaft (19). A motor (18) is fixed to the end of the conveying shell (21). The output shaft of the motor (18) is fixed to the end of the main shaft (19).

4. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 3, characterized in that, The slag conveying part (1) is provided with a valve control part (2) on the outer wall of the sampling port (6). The valve control part (2) includes a rotating ring (27) and a material passage hole (22) opened on the side wall of the rotating ring (27) and matched with the sampling port (6). The rotating ring (27) is rotatably connected to the outer wall of the conveying shell (21).

5. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 4, characterized in that, The valve control unit (2) also includes a second motor (24), which is fixed to the outer wall of the conveying shell (21) by bolts. The output shaft of the second motor (24) is connected to a gear (25) by a key. The outer wall of the rotating ring (27) is provided with teeth (26) that mesh with the outer wall of the gear (25).

6. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 4, characterized in that, The main shaft (19) has multiple levers (23) fixed on its outer wall at the sampling port (6).

7. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 1, characterized in that, The compaction section (4) includes a pressure plate (31) that fits the inner cavity size of the empty cylinder (5) and a pusher (30) disposed on one side of the pressure plate (31). A second expansion joint (28) is fixed on the other side of the pusher (30). A second support plate (29) is fixed to the outer wall of the second expansion joint (28) by bolts. The second support plate (29) is fixed to the bottom outer wall of the slag conveying section (1) by bolts.

8. The multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 7, characterized in that, One side of the pressure plate (31) is fixed with a plurality of circular array of protruding plates (34).

9. A multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 8, characterized in that, The pusher (30) is movably inserted into the inner wall of the pressure plate (31). The inner wall of the pressure plate (31) is provided with a spiral groove (35). The outer wall of the pusher (30) is fixed with a limiting protrusion (33). The limiting protrusion (33) is movably limited and matched with the inner wall of the spiral groove (35).

10. A multi-dimensional detection device for slag from oxygen pressure leaching of germanium-zinc concentrate according to claim 9, characterized in that, A spring (32) is fastened to the opposite side of the pusher (30) and the pressure plate (31).

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