Double-impeller leaching stirring tank convenient to clean and used for gold selection

Abstract

The invention relates to the field of leaching stirring tanks, in particular to a double-impeller leaching stirring tank convenient to clean for gold selection, and aims to solve the problems that an existing leaching stirring tank is poor in stirring effect and low in efficiency, according to the scheme, the double-impeller leaching stirring tank comprises a barrel with the bottom end provided with a plurality of supporting frames, and the cross section of the barrel is oval; a driving motor is installed in the middle of the bottom end of the barrel, an output shaft of the driving motor is connected with a rotating barrel located in the barrel, and two telescopic impeller assemblies rotationally connected to the interior of the barrel are movably installed on the outer side wall of the rotating barrel. The device is unique in structure, ore pulp in the barrel can form a more complex flowing mode in the stirring process, liquid flows without dead angles, and the mixing and leaching efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of leaching stirring tanks, in particular to a double-impeller leaching stirring tank which is easy to clean and used for gold selection. Background Art

[0002] At present, hydrometallurgy is an important branch of chemical mineral processing, with good sorting effect and wide application. The leaching tanks widely used in non-ferrous metal extraction metallurgy mainly include percolation tanks, compressed air stirring tanks, mechanical stirring tanks, air and mechanical combined stirring tanks and Carmel Towers.

[0003] The Chinese patent with patent number CN216514034U discloses a double-impeller leaching stirring tank, which is provided with an electric push rod, an impeller body, a shell, a sound-absorbing board and a buffer protection board. By controlling the electric push rod, the impeller body can be easily driven to move up and down, so that it is convenient to stir areas at different heights, and the stirring effect is good. The sound-absorbing board, buffer spring and buffer protection board in the shell can effectively reduce the noise diffused to the outside, reduce noise pollution, and improve the performance of the equipment. Although the impeller body can be driven to move up and down by the electric push rod, it can only stir areas at a certain height within a certain period of time, and the inside of the stirring tank cannot be kept in a completely stirred state at all times, and there is still a problem of poor stirring efficiency. Summary of the invention

[0004] The double-impeller leaching stirring tank for gold selection which is easy to clean provided by the invention solves the problems of poor stirring effect and low efficiency of the existing leaching stirring tank.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A double-impeller leaching stirring tank for gold selection that is easy to clean comprises a cylinder with a plurality of support frames installed at the bottom, the cross section of the cylinder is elliptical, a driving motor is installed at the middle position of the bottom end of the cylinder, the output shaft of the driving motor is connected to a rotating cylinder located inside the cylinder, two telescopic impeller assemblies rotatably connected to the inside of the cylinder are movably installed on the outer wall of the rotating cylinder, and the telescopic impeller assembly comprises two stirring blades connected by a spring rod; An air guide assembly connected to an air pump is installed at the top of the rotating cylinder, and an air outlet end of the air guide assembly is connected to a telescopic impeller assembly with an air jet chamber through an air guide pipe; The rotating cylinder is provided with a plurality of liquid guiding holes along its radial direction, and the bottom end of the rotating cylinder is communicated with the top end opening of the cylinder body through a liquid return mechanism.

[0006] As a preferred embodiment, the telescopic impeller assembly also includes two wavy stirring blades, a spring rod is connected between the top and bottom ends of the two stirring blades, and the two stirring blades are arranged side by side when the spring rod is extended to the minimum length, and a fixed rod with a clamping block is installed on one side of one stirring blade, and the clamping block is clamped in the clamping groove on the outer side wall of the rotating cylinder.

[0007] As a preferred embodiment, the stirring blade is provided with an air guide hole, which is connected to an air guide assembly through an air guide tube, and a jet cavity with jet holes at both ends is provided at the bending part of the stirring blade, the jet cavity and the air guide hole are connected to each other, and a tension spring is installed inside the jet cavity through a spring fixing part, and both ends of the tension spring are respectively connected to conical sealing plugs located at the jet hole.

[0008] As a preferred embodiment, an outwardly protruding mounting shaft is installed between the top and bottom ends of another stirring blade, and a rotating wheel which is rollingly connected to the inner wall of the cylinder is sleeved on the mounting shaft.

[0009] As a preferred embodiment, the gas guide assembly includes a gas guide cylinder located at the top of the rotating cylinder, a rotating joint is installed at the top of the gas guide cylinder, and the other end of the rotating joint is connected to an air pump through an air guide pipe; The outer rotating sleeve of the gas guide cylinder is connected with a mounting ring, connecting rods are installed on both sides of the mounting ring, and two telescopic rods 2 are installed on the outer side wall of the cylinder body, and the output shaft of the telescopic rod 2 is fixedly connected with the connecting rod.

[0010] As a preferred embodiment, a plurality of limit pins are installed at the bottom end of the air guide cylinder, and the limit pins are movably inserted into the pin holes at the top end of the rotating cylinder.

[0011] As a preferred embodiment, the liquid return mechanism comprises a liquid guide cylinder whose top end is connected to the bottom end of the rotating cylinder, a driving motor is installed at the bottom end of the rotating cylinder, an output shaft of the driving motor is connected to a rotating shaft located inside the rotating cylinder, a spiral blade slidably connected to the inner wall of the rotating cylinder is installed outside the rotating shaft, and a liquid return pipe and a liquid discharge pipe with a valve are connected to the bottom end of the rotating cylinder; The top end of the rotating shaft is fixedly connected with a connecting piece which is transversely arranged at the bottom end of the rotating cylinder.

[0012] As a preferred embodiment, a loading net cylinder with an open top is provided inside the rotating cylinder, the top of the loading net cylinder is threadedly connected to the thread groove at the bottom of the air guide cylinder, and the interior of the loading net cylinder is filled with activated carbon.

[0013] As a preferred embodiment, the cylinder body is movably installed with an arc filter screen separating one side of the interior thereof, the arc filter screen is located between the liquid outlet of the return pipe and the rotating cylinder, and the cylinder body is externally installed with a telescopic rod 1 that drives the arc filter screen to move up and down.

[0014] As a preferred embodiment, two telescopic impeller assemblies are arranged at a ninety-degree angle on the rotating cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention proposes a double-impeller leaching stirring tank for gold selection that is easy to clean. By setting the barrel body to an elliptical shape and coordinating with wave-shaped stirring blades that cover the entire height of the liquid, the slurry in the barrel body can form a more complex flow pattern during the stirring process, reducing the dead angle of liquid flow, making the stirring more uniform and thorough at the same time, and the mixing efficiency is high; At the same time, the setting of the telescopic impeller blades can perfectly adapt to the elliptical cylinder design. When rotating, the radial position of the mixing blades also changes, further improving the mixing effect.

[0016] 2. The present invention proposes a double-impeller leaching stirring tank for gold selection that is easy to clean. Through the arrangement of a rotating cylinder, a liquid guide hole and a liquid return mechanism, the slurry is gathered in the rotating cylinder under the action of gravity when flowing, impacts each other, and circulates, further improving the mixing effect and reducing the mixing dead angle; At the same time, by arranging a loading net cylinder filled with activated carbon inside the rotating cylinder, the impurities in the mixed liquid can be absorbed or leached by activated carbon.

[0017] 3. The present invention proposes a double-impeller leaching stirring tank for gold selection which is easy to clean. Through the gas guide component and the stirring blade with the jet chamber, the gas can be evenly dispersed in the slurry. The bubbles are ejected and moved at multiple positions in the cylinder, which not only strengthens the movement of the slurry, but also increases the gaseous oxygen required for leaching, thereby improving the leaching rate, reducing the leaching time, and improving the recovery rate.

[0018] 4. The present invention proposes a double-impeller leaching stirring tank which is easy to clean for gold selection. Through the arrangement of an arc filter screen and a telescopic rod, after the leaching and stirring is completed, the gold-containing resin particles adsorbed by the ion exchange resin method can be quickly filtered out or the impurities in the ore pulp can be filtered out.

[0019] The invention has a unique structure, has no dead angle in liquid flow, and has high mixed leaching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the double-impeller leaching stirring tank for gold selection that is easy to clean proposed by the present invention; Figure 2 A partial cross-sectional view of the double-impeller leaching stirring tank for gold selection that is easy to clean proposed by the present invention; Figure 3 This is a schematic diagram of the installation of a telescopic impeller assembly and a rotating drum of a double-impeller leaching stirring tank for gold selection that is easy to clean proposed by the present invention; Figure 4 A schematic diagram of the structure of a telescopic impeller assembly of a double-impeller leaching and stirring tank for gold selection that is easy to clean proposed by the present invention; Figure 5 A schematic diagram of the structure of the stirring blades of the double-impeller leaching stirring tank for gold selection which is easy to clean proposed by the present invention; Figure 6 for Figure 5 A partial enlarged view of the middle part; Figure 7 This is a schematic diagram of the structure of the rotating drum of the double-impeller leaching stirring tank for gold selection that is easy to clean proposed by the present invention; Figure 8 This is a schematic structural diagram of the gas guide assembly and the loading net cylinder of the double-impeller leaching stirring tank for gold selection that is easy to clean proposed by the present invention; Fig. 9 This is a schematic diagram of the structure of the liquid return mechanism and the drive motor of the double-impeller leaching stirring tank for gold selection that is easy to clean proposed by the present invention; Fig.10 It is a structural schematic diagram of Example 3; Fig.11 Schematic diagram of the structure of the arc filter and telescopic rod 1 in Example 3.

[0021] In the figure: 1, support frame; 2, cylinder; 3, telescopic impeller assembly; 301, clamping block; 302, fixing rod; 303, spring rod; 304, stirring blade; 3041, jet chamber; 3042, spring fixing piece; 3043, tension spring; 3044, conical sealing plug; 305, mounting shaft; 306, rotating wheel; 4, rotating cylinder; 401, latch hole; 402, liquid guide hole; 403, clamping groove; 5, air guide assembly; 501, rotating joint; 502, mounting ring; 503, connecting rod; 504, telescopic rod two; 505, air guide cylinder; 506, limit latch; 6, arc filter; 7, telescopic rod one; 8, liquid return pipe; 9, liquid guide cylinder; 10, driving motor; 11, liquid discharge pipe; 12, connecting piece; 13, rotating shaft; 14, spiral blade; 15, loading net cylinder. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1, reference Figure 1-9The double-impeller leaching stirring tank for gold selection and easy cleaning comprises a cylinder 2 with a plurality of support frames 1 installed at the bottom, the cross section of the cylinder 2 is elliptical, a driving motor 10 is installed at the middle position of the bottom end of the cylinder 2, the output shaft of the driving motor 10 is connected to a rotating cylinder 4 located inside the cylinder 2, two telescopic impeller assemblies 3 rotatably connected to the inside of the cylinder 2 are movably installed on the outer wall of the rotating cylinder 4, and the telescopic impeller assembly 3 comprises two stirring blades 304 connected by a spring rod 303; The telescopic impeller assembly 3 also includes two wavy stirring blades 304, and a spring rod 303 is connected between the top and bottom ends of the two stirring blades 304. The two stirring blades 304 are arranged side by side when the spring rod 303 is extended to the minimum length. A fixed rod 302 with a clamping block 301 is installed on one side of one stirring blade 304, and the clamping block 301 is clamped in the clamping groove 403 on the outer wall of the rotating cylinder 4. The clamping installation can realize the rapid disassembly and assembly of the telescopic impeller assembly 3, and it is convenient to clean the inside of the cylinder 2 and the telescopic impeller assembly 3 after disassembly and assembly.

[0024] Furthermore, the stirring blade 304 may also be in the shape of a spiral tube, and when the spring rod 303 drives it to extend to the shortest distance, the two stirring blades 304 are arranged in an alternating manner up and down; The stirring blade 304 is provided with an air guide hole, which is connected to the air guide assembly 5 through an air guide pipe. The bending part of the stirring blade 304 is provided with an air injection cavity 3041 with air injection holes at both ends. The air injection cavity 3041 is connected with the air guide hole. A tension spring 3043 is installed inside the air injection cavity 3041 through a spring fixing member 3042. Both ends of the tension spring 3043 are respectively connected to a conical sealing plug 3044 located at the air injection hole. An outwardly protruding mounting shaft 305 is mounted between the top and bottom ends of the other stirring blade 304 , and a rotating wheel 306 that is rollingly connected to the inner wall of the cylinder 2 is sleeved on the mounting shaft 305 .

[0025] Furthermore, two telescopic impeller assemblies 3 are arranged at an angle of ninety degrees on the rotating cylinder 4, and the two telescopic impeller assemblies 3 are always kept in the slurries with different flow rates, further improving the mixing effect.

[0026] An air guide assembly 5 connected to an air pump is installed at the top of the rotating cylinder 4, and the air outlet end of the air guide assembly 5 is connected to the telescopic impeller assembly 3 with the jet chamber 3041 through an air guide pipe (not shown in the figure); The air guide assembly 5 includes an air guide cylinder 505 located at the top of the rotating cylinder 4, a rotating joint 501 is installed at the top of the air guide cylinder 505, and the other end of the rotating joint 501 is connected to an air pump through an air guide pipe; The outer rotatable sleeve of the air guide cylinder 505 is connected with a mounting ring 502 , and connecting rods 503 are installed on both sides of the mounting ring 502 . Two telescopic rods 504 are installed on the outer wall of the cylinder body 2 , and the output shaft of the telescopic rod 504 is fixedly connected to the connecting rod 503 .

[0027] In order to further improve the stability of the air guide cylinder 505 installed on the rotating cylinder 4, a plurality of limit pins 506 are installed at the bottom end of the air guide cylinder 505. The limit pins 506 are movably inserted into the pin holes 401 at the top of the rotating cylinder 4. The air guide cylinder 505 can rotate with the rotation of the rotating cylinder 4, and the air guide tube connected to the stirring blade 304 will not get tangled and fall off due to rotation.

[0028] The interior of the rotating cylinder 4 is provided with a loading mesh cylinder 15 with an open top, the top of the loading mesh cylinder 15 is threadedly connected to the thread groove at the bottom end of the air guide cylinder 505, and the interior of the loading mesh cylinder 15 is filled with activated carbon. Through the arrangement of the loading mesh cylinder 15 and the activated carbon, it is possible to adsorb impurities in the ore slurry or leaching metal ions through the activated carbon method.

[0029] The rotating cylinder 4 is provided with a plurality of liquid guide holes 402 along its radial direction. The bottom end of the rotating cylinder 4 is connected with the top opening of the cylinder body 2 through a liquid return mechanism. The liquid return mechanism may also be a liquid return pipe with a liquid pump.

[0030] When in use, firstly, multiple telescopic impeller assemblies 3 are clamped into the clamping grooves 403 on the outer wall of the rotating cylinder 4 through the clamping blocks 301, so as to realize the rapid installation of the telescopic impeller assemblies 3; Then the output shaft of the second telescopic rod 504 drives the air guide cylinder 505 to descend and be fixed on the rotating cylinder 4 through the connecting rod 503 and the mounting ring 502, and at the same time prevents the telescopic impeller assembly 3 from running upwards when rotating. Then the air guide pipe connected to it is connected to the corresponding stirring blade 304, and the air pump is started. The gas enters the air guide cylinder 505 through the air guide pipe, and then enters the jet cavity 3041 on the stirring blade 304 through another air guide pipe, breaking open the conical sealing plug 3044 on the jet cavity 3041 and driving the tension spring 3043 to pull up, so that the gas is ejected; Then, the ore pulp and the reagent are poured into the cylinder 2 at the same time, and the driving motor 10 is started at the same time. The output shaft of the driving motor 10 drives the rotating cylinder 4 to rotate, and the rotating cylinder 4 drives the telescopic impeller assembly 3 to rotate in the elliptical cylinder 2, so as to achieve the mixing and stirring of the ore pulp and the reagent, so that they can fully react. When the telescopic impeller assembly 3 rotates around the rotating cylinder 4, the spring rod 303 drives a stirring blade 304 thereon to continuously change its position in the cylinder 2, and one side of the stirring blade 304 rolls on the inner wall of the cylinder 2 through the rotating wheel 306, so that the ore pulp in the cylinder forms a more complex flow pattern, reduces the dead angle of liquid flow, and makes the stirring more uniform and thorough at the same time, and the ore pulp flowing into the liquid guide hole 402 on the rotating cylinder 4 is refluxed to the cylinder 2 through the reflux mechanism, so as to achieve circulating flow, and further improve the mixing effect.

[0031] Embodiment 2, as Fig. 9 As shown, different from Example 1, the liquid return mechanism includes a liquid guide tube 9 whose top end is connected to the bottom end of the rotating cylinder 4, a driving motor 10 is installed at the bottom end of the rotating cylinder 4, the output shaft of the driving motor 10 is connected to a rotating shaft 13 located inside the rotating cylinder 4, a spiral blade 14 slidingly connected to the inner wall of the rotating cylinder 4 is installed outside the rotating shaft 13, the bottom end of the rotating cylinder 4 is connected to a liquid return pipe 8 with a valve and a liquid discharge pipe 11, and the top end of the rotating shaft 13 is fixedly connected to a connecting piece 12 horizontally arranged at the bottom end of the rotating cylinder 4.

[0032] Open the valve on the liquid return pipe 8, close the valve on the liquid discharge pipe 11, and drive the output shaft of the motor 10 to drive the rotating shaft 13 and the spiral blade 14 to rotate, so that the slurry can be sucked into the liquid guide cylinder 9 through the inside of the rotating cylinder 4, and then return to the cylinder 2 through the liquid return pipe 8. When the slurry flows, it gathers in the rotating cylinder 4 under the action of gravity and impacts each other, and circulates, which further improves the mixing effect and reduces the mixing dead angle. There is no need to set an external pump body to realize the flow of the slurry, which reduces the cost.

[0033] Embodiment 3, as Fig.10 and Fig.11 As shown, different from Example 2, in order to further quickly filter out the gold-bearing adsorbent or impurities, an arc filter 6 is movably installed inside the cylinder 2 to separate one side of the interior thereof, and the arc filter 6 is located between the liquid outlet of the return liquid pipe 8 and the rotating cylinder 4, and a telescopic rod 7 is installed outside the cylinder 2 to drive the arc filter 6 to move up and down; When it is necessary to filter the slurry in the cylinder 2, the output shaft of the telescopic rod 7 drives the arc filter 6 to descend and be installed in the cylinder 2 to separate the inside of the cylinder 2. When the liquid return mechanism is started, the slurry flows into one side of the cylinder 2 through the liquid return pipe 8 and then passes through the arc filter 6 to filter the slurry. When the ion exchange resin method is used to adsorb metal ions, the cyanided ore pulp is passed through an adsorption column filled with ion exchange resin and placed on the side of the arc filter near the return pipe 8. The gold cyanide complex ions in the ore pulp are exchanged with the exchangeable ions on the resin and adsorbed. After the adsorption is saturated, the resin is taken out and desorbed with a specific desorbent, so that the gold is separated from the resin and enters the desorption liquid, and then the gold is extracted from the desorption liquid.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-impeller leaching stirring tank for gold selection that is easy to clean, comprising a cylinder (2) with a plurality of support frames (1) mounted at the bottom, characterized in that: The cross section of the cylinder (2) is elliptical. A driving motor (10) is installed at the middle position of the bottom end of the cylinder (2). The output shaft of the driving motor (10) is connected to a rotating cylinder (4) located inside the cylinder (2). Two telescopic impeller assemblies (3) rotatably connected to the inside of the cylinder (2) are movably installed on the outer wall of the rotating cylinder (4). The telescopic impeller assemblies (3) include two stirring blades (304) connected by a spring rod (303). An air guide assembly (5) connected to an air pump is installed at the top end of the rotating cylinder (4); an air outlet end of the air guide assembly (5) is connected to a telescopic impeller assembly (3) with an air jet chamber (3041) via an air guide pipe; The rotating cylinder (4) is provided with a plurality of liquid guide holes (402) along its radial direction, and the bottom end of the rotating cylinder (4) is connected to the top end opening of the cylinder body (2) via a liquid return mechanism.

2. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 1 is characterized in that: The telescopic impeller assembly (3) further comprises two wave-shaped stirring blades (304), a spring rod (303) being connected between the top and bottom ends of the two stirring blades (304), and the two stirring blades (304) are arranged side by side when the spring rod (303) is extended to a minimum length, and a fixed rod (302) with a clamping block (301) is installed on one side of one stirring blade (304), and the clamping block (301) is clamped in a clamping groove (403) on the outer side wall of the rotating cylinder (4).

3. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 2 is characterized in that: The stirring blade (304) is provided with an air guide hole, the air guide hole being connected to an air guide assembly (5) via an air guide tube, a jet cavity (3041) having jet holes at both ends is provided at the bending part of the stirring blade (304), the jet cavity (3041) and the air guide hole are communicated with each other, a tension spring (3043) is installed inside the jet cavity (3041) via a spring fixing member (3042), and both ends of the tension spring (3043) are respectively connected to a conical sealing plug (3044) located at the jet hole.

4. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 2 is characterized in that: An outwardly protruding mounting shaft (305) is mounted between the top and bottom ends of the other stirring blade (304), and a rotating wheel (306) is sleeved on the mounting shaft (305) and is rollingly connected to the inner wall of the cylinder (2).

5. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 1 is characterized in that: The air guide assembly (5) comprises an air guide cylinder (505) located at the top of the rotating cylinder (4); a rotating joint (501) is installed at the top of the air guide cylinder (505); and the other end of the rotating joint (501) is connected to an air pump via an air guide pipe; The outer portion of the air guide cylinder (505) is rotatably sleeved with a mounting ring (502), and connecting rods (503) are mounted on both sides of the mounting ring (502). Two telescopic rods (504) are mounted on the outer side wall of the cylinder body (2), and the output shaft of the telescopic rod (504) is fixedly connected to the connecting rod (503).

6. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 5 is characterized in that: A plurality of limit pins (506) are installed at the bottom end of the air guide cylinder (505), and the limit pins (506) are movably inserted into the pin holes (401) at the top end of the rotating cylinder (4).

7. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 1 is characterized in that: The liquid return mechanism comprises a liquid guide cylinder (9) whose top end is connected to the bottom end of the rotating cylinder (4); a driving motor (10) is mounted at the bottom end of the rotating cylinder (4); an output shaft of the driving motor (10) is connected to a rotating shaft (13) located inside the rotating cylinder (4); a spiral blade (14) is mounted outside the rotating shaft (13) and is slidably connected to the inner wall of the rotating cylinder (4); and a liquid return pipe (8) and a liquid discharge pipe (11) with a valve are connected to the bottom end of the rotating cylinder (4); The top end of the rotating shaft (13) is fixedly connected to a connecting piece (12) which is arranged transversely at the bottom end of the interior of the rotating cylinder (4).

8. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 5 is characterized in that: A loading net cylinder (15) with an open top is provided inside the rotating cylinder (4), the top of the loading net cylinder (15) is threadedly connected to a thread groove at the bottom of the air guide cylinder (505), and the interior of the loading net cylinder (15) is filled with activated carbon.

9. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 7, characterized in that: The cylinder (2) is movably provided with an arc-shaped filter screen (6) for separating one side of the interior thereof; the arc-shaped filter screen (6) is located between the liquid outlet of the liquid return pipe (8) and the rotating cylinder (4); and the cylinder (2) is provided with a telescopic rod (7) for driving the arc-shaped filter screen (6) to move up and down.

10. The double-impeller leaching stirring tank for gold selection that is easy to clean according to claim 2, characterized in that: Two telescopic impeller assemblies (3) are arranged at an angle of ninety degrees on the rotating cylinder (4).

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