CN113333162A - Magnetic iron removing method - Google Patents
Magnetic iron removing method Download PDFInfo
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- CN113333162A CN113333162A CN202110672619.7A CN202110672619A CN113333162A CN 113333162 A CN113333162 A CN 113333162A CN 202110672619 A CN202110672619 A CN 202110672619A CN 113333162 A CN113333162 A CN 113333162A
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- iron
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- spiral
- magnetization
- electromagnetic
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 266
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 34
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 86
- 229910052751 metal Inorganic materials 0.000 claims abstract description 63
- 239000002184 metal Substances 0.000 claims abstract description 63
- 239000000843 powder Substances 0.000 claims abstract description 42
- 230000005415 magnetization Effects 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000126 substance Substances 0.000 description 16
- 239000002893 slag Substances 0.000 description 8
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- -1 iron ions Chemical class 0.000 description 2
- 229940099596 manganese sulfate Drugs 0.000 description 2
- 235000007079 manganese sulphate Nutrition 0.000 description 2
- 239000011702 manganese sulphate Substances 0.000 description 2
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a magnetization iron-removing method, which comprises the steps of using a magnetization iron-removing device to carry out magnetization iron-removing on electrolytic manganese dioxide dry powder; the magnetic iron removing device comprises a tank body, an electromagnetic iron remover is arranged between the feeding hole and the discharging hole, the electromagnetic iron remover comprises at least two spiral electromagnetic iron removing pipes which are wound with each other, each spiral electromagnetic iron removing pipe comprises a metal round pipe, a metal filter element is arranged inside the metal round pipe, an electromagnetic coil is wound outside the metal round pipe, the pipe wall of the metal round pipe is hollow, and insulating cooling oil is arranged in the hollow part of the metal round pipe; the magnetization deironing includes: and supplying power to an electromagnetic coil, feeding electrolytic manganese dioxide dry powder into a feeding hole, starting a motor to rotate the outlet section at the bottom of the spiral electromagnetic iron removing pipe to drive the whole electromagnetic iron remover to rotate in the forward direction, and then stopping the motor and rotating in the reverse direction. The invention can solve the problems of poor iron removal effect, repeated iron removal and high processing cost of the conventional electrolytic manganese dioxide dry powder magnetization.
Description
Technical Field
The invention relates to the technical field of mining equipment manufacturing, in particular to a method for removing iron impurities by magnetism for lithium manganate type electrolytic manganese dioxide.
Background
The process of electrolyzing manganese dioxide in a lithium manganate type is carried out in a lithium battery and is a positive electrode in the lithium battery, when manganese dioxide materials in the lithium battery contain iron exceeding the standard, iron is continuously deposited on the surface of a negative electrode to form metal chains, the metal chains cause short circuit in the battery through pores of diaphragm paper, the battery is slowly discharged until the battery fails, and the battery is rapidly discharged and generates a large amount of heat, so that organic electrolyte in the battery is possibly leaked. The existing electrolytic manganese dioxide production process generally adopts manganese ore and concentrated sulfuric acid to carry out redox reaction to prepare manganese sulfate solution, divalent iron ions and trivalent iron ions are sequentially removed in the solution preparation process, the manganese sulfate solution is purified to remove heavy metals and then is put into an electrolytic bath for electrolysis, a crude electrolytic manganese dioxide product is obtained after a period, and the crude electrolytic manganese dioxide product is rinsed, ground and mixed to obtain the electrolytic manganese dioxide product.
The conventional electrolytic manganese dioxide dry powder magnetization iron removal equipment generally comprises a tank body for removing iron from manganese dioxide dry powder on a support, wherein a feed inlet is formed in the tank body, a discharge outlet is formed in the lower end of the tank body, the tank body is obliquely arranged to facilitate sliding of the electrolytic manganese dioxide dry powder, a permanent magnet on the upper portion in the tank body sucks away iron impurities in the electrolytic manganese dioxide dry powder sliding below the tank body, the electrolytic manganese dioxide dry powder is limited in sliding length in the tank body, the dry powder is not easy to scatter, the dry powder is not uniformly distributed, the content of elemental iron is still 20-30 ppm after magnetization treatment, the iron removal effect is poor, and subsequent use of the manganese dioxide dry powder is influenced, so in order to meet the requirement of a lithium ion anode material, secondary iron removal is often required, the processing cost is high, and the energy consumption is high.
Disclosure of Invention
The invention aims to solve the problem that the existing electrolytic manganese dioxide dry powder has poor magnetization and iron removal effects, needs to remove iron for multiple times and has high processing cost.
In order to solve the problems, the technical scheme of the invention is as follows: the magnetic iron removal method comprises using a magnetic iron removal device to remove iron from electrolytic manganese dioxide dry powder; the magnetic iron removal device comprises a tank body supported by a support, a feed inlet is formed in the upper end of the tank body, a discharge outlet is formed in the lower end of the feed inlet, an electromagnetic iron remover is arranged between the feed inlet and the discharge outlet in the tank body, the electromagnetic iron remover comprises at least two spiral electromagnetic iron removal pipes which are wound with each other, the tops of all the spiral electromagnetic iron removal pipes are converged into an inlet section, the bottoms of all the spiral electromagnetic iron removal pipes are converged into an outlet section, each spiral electromagnetic iron removal pipe comprises a metal round pipe, a metal filter element is arranged in the metal round pipe, an electromagnetic coil is wound outside the metal round pipe, the wall of the metal round pipe is hollow, and insulating cooling oil is arranged in the hollow part of the metal round pipe; the outlets at the bottoms of all the spiral electromagnetic iron removing pipes are connected with motors through power transmission devices;
the magnetization iron removal method comprises the following steps: when the electrolytic manganese dioxide dry powder is deironing, the electromagnetic coil is powered, the electrolytic manganese dioxide dry powder is fed into the feeding hole, the motor is started to rotate, the outlet section at the bottom of the spiral electromagnetic iron removing pipe drives the whole electromagnetic iron remover to rotate in the forward direction, the motor stops after the forward rotation, then the motor rotates reversely to drive the whole electromagnetic iron remover to rotate in the reverse direction, and the feeding and the discharging are carried out while the reciprocating rotation is carried out until the discharging is not carried out.
In order to solve the above problems, the technical solution of the present invention may further be: the magnetic iron removal method comprises using a magnetic iron removal device to remove iron from electrolytic manganese dioxide dry powder; the magnetic iron removing device comprises a tank body supported by a support, a feed inlet is formed in the upper end of the tank body, a discharge outlet is formed in the lower end of the feed inlet, a spiral electromagnetic iron removing pipe is arranged between the feed inlet and the discharge outlet in the tank body, the spiral electromagnetic iron removing pipe comprises a metal round pipe, a metal filter element is arranged in the metal round pipe, an electromagnetic coil is wound outside the metal round pipe, the pipe wall of the metal round pipe is hollow, and insulating cooling oil is arranged in the hollow part of the metal round pipe; a plurality of vibrators are uniformly distributed beside the tank body;
the magnetization iron removal method comprises the following steps: when the electrolytic manganese dioxide dry powder is deironing, the electromagnetic coil is powered, the electrolytic manganese dioxide dry powder is fed into the feeding hole, the vibrator is electrified to vibrate the tank body, meanwhile, feeding and discharging are continuously carried out, the vibrator is intermittently stopped in the period, and the tank body is repeatedly vibrated until discharging is stopped.
In the above technical solution, a more specific solution may be: the filter element is a metal mesh sheet with a plurality of small pieces arranged in a stacked mode or a metal mesh sheet with a stacked spiral rotation mode.
Further: the filter element is a plurality of spiral metal strips matched with the spiral curvature of the spiral electromagnetic iron removal pipe.
Further: the feeding hole is connected with a feeding conveying pipeline driven by a screw, and the discharging hole is connected with a discharging conveying pipeline driven by the screw; and a flexible damping piece is arranged at the bottom of the support.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the magnetization iron-removing method adopts the electromagnetic coil to generate a high-strength uniform magnetic field in the middle to form a node with extremely high magnetic field gradient for capturing magnetic substances, and when the substances flow through a magnetized medium, namely a metal net or a metal strip, the magnetic substances are captured, so that the simple substance iron in the product is removed; the staggered openings are formed when a plurality of metal nets or a plurality of layers of metal strips are stacked, so that dry manganese dioxide powder can flow through the openings, and the dry powder is more dispersed and uniform in the filtering process by combining the vibration of the vibrator to the tank body and limiting the vibration time, so that the medium can fully and uniformly absorb the elemental iron, and the iron removal is more effective;
2. the magnetic iron removal method adopts at least two spiral electromagnetic iron removal pipes which are spirally wound, so that the space can be saved, the filtering process and time of dry powder can be greatly prolonged, and the effect of vibrating and loosening the dry powder is realized by combining the forward and reverse reciprocating rotation of the whole electromagnetic iron remover, so that the dry powder is dispersed more thoroughly and uniformly, the sufficiency and uniformity of absorbing the elemental iron by a medium are increased to the maximum extent, and the iron removal effect is better;
the magnetization iron removal method has obvious iron removal effect, and can reduce the content of the simple substance iron of the product from the original 20-30 ppm to less than 10ppm at present without removing iron for many times by using any one of two iron removal methods, thereby meeting the requirement of high-performance lithium manganate type electrolytic manganese dioxide, achieving the requirement by removing iron once, improving the iron removal efficiency, reducing the energy consumption and the cost of iron removal, and being suitable for wide popularization.
Drawings
FIG. 1 is a front view of a first embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a view from the direction B of FIG. 2;
fig. 4 is a front view of the second embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in further detail with reference to the accompanying drawings:
the first embodiment is as follows:
the magnetic iron-removing method comprises using a magnetic iron-removing device to remove iron from electrolytic manganese dioxide dry powder.
The magnetization iron removing device shown in fig. 1, 2 and 3 comprises a tank body 3 supported by a support 2, wherein a flexible damping piece is arranged at the bottom of the support 2, the flexible damping piece is a rubber damper 12, and instability caused by vibration or shaking of equipment to installation can be well prevented. The upper end of the tank body 3 is provided with a feed inlet 14, the lower end of the tank body is provided with a discharge outlet 11, the feed inlet 14 is connected with a screw-driven feeding conveying pipeline 13, and the discharge outlet 11 is connected with a screw-driven discharging conveying pipeline 1.
An electromagnetic iron remover is arranged between a feed inlet and a discharge outlet in a tank body 3, the electromagnetic iron remover comprises two spiral electromagnetic iron removing pipes 4 which are wound with each other, the tops of all the spiral electromagnetic iron removing pipes 4 are converged at an inlet section 5, the bottoms of all the spiral electromagnetic iron removing pipes 4 are converged at an outlet section 6, the spiral electromagnetic iron removing pipes comprise metal round pipes 4-4, metal filter elements are arranged inside the metal round pipes 4-4, the filter elements are metal nets 4-3 which are stacked and spirally rotated, electromagnetic coils 4-1 are wound outside the metal round pipes 4-4, the pipe walls of the metal round pipes 4-4 are hollow, insulating cooling oil 4-2 is arranged in the hollow parts, and in other embodiments, the electromagnetic iron remover can be formed by converging three or even four spiral electromagnetic iron removing pipes which are wound with each other; the outlet sections 6 at the bottom of all the spiral electromagnetic iron removing pipes are connected with a motor 7 through a power transmission device 8, the motor 7 is a stepping motor, the power transmission device is a stepping belt, and stepping teeth are arranged outside the outlet sections 6 at the bottom of the spiral electromagnetic iron removing pipes.
The tank body 3 is provided with a slag hole 9 for discharging iron impurities at an outlet section 6 at the bottom of the spiral electromagnetic iron removing pipe, and a partition plate and a material distributing pneumatic valve 10 for controlling the partition plate are arranged between the slag hole 9 and the discharge hole 11.
The magnetization iron removal method comprises the following steps: when the electrolytic manganese dioxide dry powder is deironing, the electromagnetic coil 4-1 is powered, the motor 7 is started to rotate the outlet section at the bottom of the spiral electromagnetic deironing pipe 4 while the electrolytic manganese dioxide dry powder is fed into the feeding hole to drive the whole electromagnetic deironing device to rotate in the forward direction, the motor stops 2 seconds after the forward rotation is carried out for 6 seconds, then the motor 7 rotates reversely to drive the whole electromagnetic deironing device to rotate in the reverse direction, the material is fed and discharged while the material is repeatedly rotated in the way until the material is not discharged any more, and the feeding is stopped and the motor is stopped for 10 minutes after 120 minutes; when the iron slag in the electromagnetic iron remover needs to be removed, the electromagnetic coil is stopped to supply power, the partition plate is switched to cover the discharge hole by the pneumatic control distributing valve 10, so that the slag hole 9 is directly communicated with the outlet section at the bottom of the spiral electromagnetic iron removing pipe, and the slag is discharged.
The method adopts an electromagnetic coil to generate a high-strength uniform magnetic field in the middle to form a node with extremely high magnetic field gradient for capturing magnetic substances, and when the substances flow through a magnetized medium, namely a metal net or a metal strip, the magnetic substances are captured, so that simple substance iron in the product is removed; when a plurality of metal meshes or a plurality of layers of metal strips are stacked, staggered openings are formed so that dry manganese dioxide powder materials can flow through the openings; at least two spiral wound spiral electromagnetic iron removing pipes 4 can save space, can greatly increase the filtering process and time of dry powder, and can play a role in loosening the dry powder by combining the positive and negative reciprocating rotation of the whole electromagnetic iron remover, so that the dry powder is dispersed more thoroughly and uniformly, the sufficiency and uniformity of absorbing the elemental iron by a medium are increased to the maximum extent, and the iron removing effect is better.
After the method is used, the content of the simple substance iron of the product can be reduced to 6ppm at present from 20-30 ppm at a time by removing iron, and the requirement of high-performance lithium manganate type electrolytic manganese dioxide is met.
Example two:
the magnetic iron-removing method comprises using a magnetic iron-removing device to remove iron from electrolytic manganese dioxide dry powder.
The magnetization iron removal device shown in fig. 4 comprises a tank body 23 supported by a bracket 22, the upper end of the tank body 23 is provided with a feed inlet 214, the lower end of the tank body 23 is provided with a discharge outlet 211, a spiral electromagnetic iron removal pipe 24 is arranged between the feed inlet 214 and the discharge outlet 211 in the tank body 23, the spiral electromagnetic iron removal pipe 24 comprises a metal round pipe 24-4, the interior of the metal round pipe 24-4 is provided with a metal filter element, the filter element is a plurality of metal mesh sheets 24-3 arranged in a stacking manner, the metal round pipe is wound with an electromagnetic coil 24-1, the pipe wall of the metal round pipe 24-4 is hollow, the hollow part is provided with insulating cooling oil 24-2, the insulating cooling oil 24-2 flows to the position between the inner wall of the tank body 23 and the electromagnetic coil 24-1 through holes in the pipe wall of the; a plurality of vibrators 27 are uniformly distributed on the periphery of the lower part of the tank body 23, and an electromagnetic coil is adopted to generate a high-strength uniform magnetic field in the middle to form a node with extremely high magnetic field gradient for capturing magnetic substances, wherein the magnetic substances are captured when the substances flow through a magnetized medium, namely a metal net or a metal strip, so that simple substance iron in the product is removed; the staggered openings are formed when a plurality of metal nets or a plurality of layers of metal strips are stacked, so that dry manganese dioxide powder can flow through the openings, and the dry manganese dioxide powder can vibrate the tank body by combining the vibrator, so that the vibration time is limited, the dry powder is more dispersed and uniform in the filtering process, the medium can fully and uniformly absorb the elemental iron, and the iron removal is more effective.
Other structures are as in embodiment one.
The magnetization iron removal method comprises the following steps: when the iron is removed from the electrolytic manganese dioxide dry powder, the electromagnetic coil 24-1 is powered, the electrolytic manganese dioxide dry powder is fed into the feeding hole, the vibrator 27 is electrified to vibrate the tank body 23, the feeding and the discharging are continuously carried out, the vibration is stopped for 1 minute after the vibration is carried out for 20 minutes, the vibration is continued for 20 minutes and is stopped for 1 minute, and the tank body is repeatedly vibrated until the discharging is not carried out; when the iron slag in the electromagnetic iron remover needs to be removed, the electromagnetic coil is stopped to supply power, the partition plate is switched to cover the discharge hole by the pneumatic control distributing valve 210, so that the slag hole 29 is directly communicated with the outlet section at the bottom of the spiral electromagnetic iron removing pipe, and the slag is discharged.
After the method is used, the content of the simple substance iron of the product can be reduced to 9ppm from 20-30 ppm at present by removing iron once, and the requirement of high-performance lithium manganate type electrolytic manganese dioxide is met.
In other embodiments, the filter element can be a plurality of spiral metal strips matched with the spiral curvature of the spiral electromagnetic iron removal pipe according to different working conditions.
The magnetization iron removal method has obvious iron removal effect, and can reduce the content of the simple substance iron of the product from the original 20-30 ppm to less than 10ppm at present without removing iron for many times by using any one of two iron removal methods, thereby meeting the requirement of high-performance lithium manganate type electrolytic manganese dioxide, achieving the requirement by removing iron once, improving the iron removal efficiency, reducing the energy consumption and the cost of iron removal, and being suitable for wide popularization.
Claims (6)
1. A method for removing iron by magnetization comprises using a device for removing iron by magnetization to electrolytic manganese dioxide dry powder; magnetization deironing device includes the jar body that the support supported, jar body upper end has the feed inlet lower extreme to have a discharge gate, its characterized in that: an electromagnetic iron remover is arranged between the feed inlet and the discharge outlet in the tank body, the electromagnetic iron remover comprises at least two spiral electromagnetic iron removing pipes which are wound with each other, the tops of all the spiral electromagnetic iron removing pipes are converged at an inlet section, the bottoms of all the spiral electromagnetic iron removing pipes are converged at an outlet section, each spiral electromagnetic iron removing pipe comprises a metal round pipe, a metal filter element is arranged in the metal round pipe, an electromagnetic coil is wound outside the metal round pipe, the pipe wall of the metal round pipe is hollow, and insulating cooling oil is arranged in the hollow part of the metal round pipe; the outlets at the bottoms of all the spiral electromagnetic iron removing pipes are connected with motors through power transmission devices;
the magnetization iron removal method comprises the following steps: when the electrolytic manganese dioxide dry powder is deironing, the electromagnetic coil is powered, the electrolytic manganese dioxide dry powder is fed into the feeding hole, the motor is started to rotate, the outlet section at the bottom of the spiral electromagnetic iron removing pipe drives the whole electromagnetic iron remover to rotate in the forward direction, the motor stops after the forward rotation, then the motor rotates reversely to drive the whole electromagnetic iron remover to rotate in the reverse direction, and the feeding and the discharging are carried out while the reciprocating rotation is carried out until the discharging is not carried out.
2. A method for removing iron by magnetization comprises using a device for removing iron by magnetization to electrolytic manganese dioxide dry powder; magnetization deironing device includes the jar body that the support supported, jar body upper end has the feed inlet lower extreme to have a discharge gate, its characterized in that: a spiral electromagnetic iron removing pipe is arranged between the feed inlet and the discharge outlet in the tank body, the spiral electromagnetic iron removing pipe comprises a metal round pipe, a metal filter element is arranged in the metal round pipe, an electromagnetic coil is wound outside the metal round pipe, the pipe wall of the metal round pipe is hollow, and insulating cooling oil is arranged in the hollow part of the metal round pipe; a plurality of vibrators are uniformly distributed beside the tank body;
the magnetization iron removal method comprises the following steps: when the electrolytic manganese dioxide dry powder is deironing, the electromagnetic coil is powered, the electrolytic manganese dioxide dry powder is fed into the feeding hole, the vibrator is electrified to vibrate the tank body, meanwhile, feeding and discharging are continuously carried out, the vibrator is intermittently stopped in the period, and the tank body is repeatedly vibrated until discharging is stopped.
3. The magnetic iron removal method according to claim 1 or 2, characterized in that: the filter element is a metal mesh sheet with a plurality of small pieces arranged in a stacked mode or a metal mesh sheet with a stacked spiral rotation mode.
4. The magnetic iron removal method according to claim 1 or 2, characterized in that: the filter element is a plurality of spiral metal strips matched with the spiral curvature of the spiral electromagnetic iron removal pipe.
5. The magnetic iron removal method of claim 3, characterized in that: the feeding hole is connected with a feeding conveying pipeline driven by a screw, and the discharging hole is connected with a discharging conveying pipeline driven by the screw; and a flexible damping piece is arranged at the bottom of the support.
6. The magnetic iron removal method of claim 4, characterized in that: the feeding hole is connected with a feeding conveying pipeline driven by a screw, and the discharging hole is connected with a discharging conveying pipeline driven by the screw; and a flexible damping piece is arranged at the bottom of the support.
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| CN202110672619.7A CN113333162B (en) | 2021-06-17 | 2021-06-17 | Magnetizing iron removing method |
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