CN113289765A - Impurity removal method and device for electrolytic manganese dioxide - Google Patents
Impurity removal method and device for electrolytic manganese dioxide Download PDFInfo
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- CN113289765A CN113289765A CN202110424494.6A CN202110424494A CN113289765A CN 113289765 A CN113289765 A CN 113289765A CN 202110424494 A CN202110424494 A CN 202110424494A CN 113289765 A CN113289765 A CN 113289765A
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- 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
- B03C1/32—Magnetic separation acting on the medium containing the substance being separated, e.g. magneto-gravimetric-, magnetohydrostatic-, or magnetohydrodynamic separation
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Abstract
The invention discloses an impurity removing method and device for electrolytic manganese dioxide, and relates to the technical field of electrolytic manganese dioxide processing, wherein the impurity removing method comprises the steps of stripping, rinsing deacidification, crushing and magnetic separation impurity removing which are sequentially arranged, and the magnetic separation impurity removing comprises the following steps: the manganese dioxide powder and air are mixed and conveyed into the magnetic separation channel, simple substance iron impurities mixed in the manganese dioxide are removed through magnetic separation by reverse conveying of the magnetic separation conveying mechanism, the manganese dioxide powder enters the magnetic separation channel in a suspension state for magnetic separation, the problem of magnetic inclusion is effectively prevented, the air and the manganese dioxide powder are conveyed in the magnetic separation channel in a spiral air flow mode through a rotational flow guide mechanism arranged in the magnetic separation channel, and the manganese dioxide powder is in contact magnetic separation with the magnetic separation conveying mechanism in a reciprocating mode and blows off the manganese dioxide powder deposited on the magnetic separation conveying mechanism.
Description
Technical Field
The invention relates to the technical field of electrolytic manganese dioxide processing, in particular to a method and a device for removing impurities from electrolytic manganese dioxide.
Background
In the known processing method of electrolytic manganese dioxide, purified manganese sulfate solution is electrolyzed to separate manganese dioxide out on an electrode, then the separated manganese dioxide is cleaned and stripped from the electrode, and the stripped electrolytic manganese dioxide is ground to obtain a powdery semi-finished electrolytic manganese dioxide product, but elemental iron impurities are mixed in the powdery semi-finished electrolytic manganese dioxide product and need to be removed, and most of the existing impurity removal modes are removing the elemental iron impurities mixed in the powdery semi-finished electrolytic manganese dioxide product by a powdery magnetic separator.
If application publication number is CN104209187A, application publication date is 2014 12.17.A patent invention named boiling type magnetic separator comprises a magnetic separation device and a material boiling device, wherein the magnetic separation device comprises: the magnetic system comprises a bracket, a driving roller, a magnetic system, a driven roller and a motor, wherein the driving roller, the magnetic system and the driven roller are sequentially fixed on a main beam of the bracket; the driving roller is connected with the driven roller through a second transmission belt, a discharge hopper with a switch device for recovering magnetic materials is arranged on a support below the driving roller, and the material boiling device comprises: the material channel is fixed below the material channel and is communicated with the material channel through a ventilation net, the upper surface of the material channel is attached to the second transmission belt, the attachment part of the material channel and the second transmission belt is provided with an opening, and one side of the material channel is communicated with the discharge hopper to form a cavity for conveying magnetic materials; one end of the material channel is provided with a feeding hole, and the other end of the material channel is provided with a discharging hole; an air duct exhaust port with a filter screen is also arranged above one end of the discharge port of the material channel; and one end of the air channel, which is at the same position as the feed inlet, is connected with an air blower.
The above-mentioned application is also an equipment that is used for carrying out magnetic separation to likepowder form raw materials, it is through material boiling device and magnetic separation device cooperation, material boiling device makes powdered thing form the powdery granule suspension in material passageway, then carry out adsorptive separation through the magnetic separation device, it has avoided appearing the problem that magnetism pressed from both sides miscellaneous at a certain degree, but because the magnetic separation device is only an adsorption plane, and the powdery granule suspension fills whole material passageway, lead to the magnetic separation device can't carry out comprehensive magnetic separation, influence the effect of magnetic separation.
Disclosure of Invention
The invention aims to provide an impurity removing method and device for electrolytic manganese dioxide, which aim to overcome the defects in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme: the impurity removal method of electrolytic manganese dioxide comprises the steps of stripping, rinsing deacidification, crushing and magnetic separation impurity removal which are sequentially arranged, wherein the magnetic separation impurity removal comprises the following steps:
air is supplied into a magnetic separation channel with a magnetic separation conveying mechanism on the bottom surface.
As a further description of the above technical solution: and spiral wind flow is formed in the magnetic separation channel through a rotational flow guide mechanism.
As a further description of the above technical solution: the stripping is to strip manganese dioxide precipitated on an electrode during electrolysis to obtain massive manganese dioxide.
As a further description of the above technical solution: the rinsing deacidification specifically comprises the following steps:
adding the massive manganese dioxide into a rinsing barrel, washing by using hot water,
then washing with alkali liquor to neutralize, and then back washing with dilute sulphuric acid to remove impurities until the pH value is 6.0-7.0.
As a further description of the above technical solution: and the crushing is specifically to carry out powder grinding treatment on the rinsed massive manganese dioxide through a pulverizer to obtain manganese dioxide powder.
The impurity removing device for the electrolytic manganese dioxide is used for magnetic separation impurity removal in the impurity removing method and comprises a magnetic separation conveying mechanism and an impurity removing separation cover fixed on the magnetic separation conveying mechanism, wherein both ends of the impurity removing separation cover are movably connected with cover plate assemblies, and the inner side of the impurity removing separation cover and the magnetic separation conveying mechanism form a magnetic separation channel;
one end of the impurity removal separation cover is provided with an air blowing feeding assembly, and a rotational flow guide mechanism is further fixed inside the impurity removal separation cover;
and the rotational flow guide mechanism is used for conveying air sent by the air blowing feeding assembly into the magnetic separation channel in a spiral manner.
As a further description of the above technical solution: and the other side cover plate component of the impurity removing and sorting cover is communicated with a discharging pipe.
As a further description of the above technical solution: the cyclone guiding mechanism is an arc-shaped convex part, and the arc-shaped convex parts are uniformly distributed at the top of the inner side of the impurity removing and sorting cover.
As a further description of the above technical solution: the air blowing and feeding assembly comprises a connecting pipe, the connecting pipe is connected to a cover plate assembly on one side of the impurity removing and sorting cover, an air blower is arranged at the position of an outlet outside the connecting pipe, and the connecting pipe is further communicated with a feeding pipe.
As a further description of the above technical solution: magnetic separation conveying mechanism includes the carriage, and rotates the cover on the carriage and be equipped with the conveyer belt, electromagnet assembly has evenly been arranged to the inside of conveyer belt.
In the technical scheme, when the simple substance iron impurities mixed in the manganese dioxide in the powder are removed, the manganese dioxide powder and air are mixed and conveyed into the magnetic separation channel, the simple substance iron impurities mixed in the manganese dioxide are reversely conveyed by the bottom magnetic separation conveying mechanism for magnetic separation and removal, the manganese dioxide powder enters the magnetic separation channel in a suspension state for magnetic separation by mixing and conveying the air and the manganese dioxide powder, the problem of magnetic inclusion is effectively prevented, meanwhile, the air and the manganese dioxide powder are conveyed in the magnetic separation channel in a spiral air flow by the cyclone guide mechanism arranged in the magnetic separation channel, the manganese dioxide powder is repeatedly contacted with the magnetic separation conveying mechanism for magnetic separation, and the manganese dioxide powder deposited on the magnetic separation conveying mechanism is blown off, the simple substance iron impurities mixed in the manganese dioxide powder are removed and separated more comprehensively and thoroughly.
Because the impurity removal method of the electrolytic manganese dioxide has the technical effects, the corresponding impurity removal device of the electrolytic manganese dioxide of the method naturally has the corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic flow chart of a method for removing impurities from electrolytic manganese dioxide according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an overall structure of an apparatus for removing impurities from electrolytic manganese dioxide according to an embodiment of the present invention;
FIG. 3 is a schematic front view of an apparatus for removing impurities from electrolytic manganese dioxide according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an internal structure of an apparatus for removing impurities from electrolytic manganese dioxide according to an embodiment of the present invention;
FIG. 5 is a schematic view of the internal structure of an impurity removing and sorting hood according to still another embodiment of the present invention;
FIG. 6 is a schematic view of the cross-sectional structure A-A of FIG. 3 according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a cover plate assembly according to an embodiment of the present invention;
FIG. 8 is a schematic view of an assembly structure of the cover plate assembly and the magnetic separation conveying mechanism according to the embodiment of the present invention;
FIG. 9 is a schematic structural view of section A-A of FIG. 3 according to yet another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a cover plate assembly according to still another embodiment of the present invention.
Description of reference numerals:
1. a magnetic separation conveying mechanism; 10. a sealing cover; 11. a carriage; 111. a guide groove; 12. A conveyor belt; 122. an arc-shaped concave part; 13. a feeding port; 121. an electromagnet assembly; 2. a discharging pipe; 3. an impurity removal and separation cover; 31. an arc-shaped convex part; 32. a helical guide vane; 4. a cover plate assembly; 41. an end cap body; 42. a circular through hole; 43. an opening; 44. an air bag drum; 45. A convex portion; 5. an air blast supply assembly; 51. a connecting pipe; 52. a feed pipe; 53. a blower.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a technical solution: the impurity removal method of electrolytic manganese dioxide comprises the steps of crushing, rinsing deacidification, drying and magnetic separation impurity removal which are sequentially arranged, wherein the magnetic separation impurity removal comprises the following steps:
air is supplied into a magnetic separation channel with a magnetic separation conveying mechanism on the bottom surface.
Specifically, a magnetic separation channel is arranged above the magnetic separation conveying mechanism, manganese dioxide powder with elemental iron impurities is quantitatively and uniformly sent into the magnetic separation channel, air is simultaneously supplied into the magnetic separation channel, so that the manganese dioxide powder with the elemental iron impurities is mixed with air and enters the magnetic separation channel in a suspension state, the direction of the air supply and supply of the manganese dioxide powder with the elemental iron impurities in the magnetic separation channel is opposite to the conveying direction of the magnetic separation conveying mechanism, the elemental iron impurities in the manganese dioxide powder in the suspension state entering the magnetic separation channel are subjected to magnetic adsorption by the magnetic separation conveying mechanism, so that the iron impurities in manganese dioxide are removed, the magnetic adsorption and impurity removal of the manganese dioxide powder in the suspension state are realized by the mode that the elemental iron impurities are synchronously injected with the air in a matching way, compared with the mode that the manganese dioxide powder is directly sent into a conveying belt to realize better separation effect on the elemental iron impurities, effectively preventing the problem of magnetic inclusion.
In another embodiment provided by the invention, spiral wind flow is formed in the magnetic separation channel through the rotational flow guide mechanism.
It is specific, at the inside whirl direction subassembly that sets up of magnetic separation passageway, because the effect of whirl direction subassembly, the manganese dioxide powder that is the suspended state with the air mixing is carried in the state that is the heliciform wind current when the inside transport of magnetic separation passageway, make the manganese dioxide powder reciprocal and carry out the contact magnetic separation with magnetic separation conveying mechanism, get rid of the more comprehensive thorough of separation to the simple substance iron impurity that mixes in the manganese dioxide powder, can blow off the manganese dioxide powder of deposit on the magnetic separation conveying mechanism simultaneously, prevent that the last sedimentary manganese dioxide powder of magnetic separation conveying mechanism from influencing the problem of magnetic separation.
In still another embodiment of the present invention, the stripping is to strip manganese dioxide deposited on the electrode during electrolysis to obtain manganese dioxide in bulk.
Specifically, when a manganese sulfate solution is electrolyzed by an electrode, manganese dioxide is deposited on the electrode, and then the deposited manganese dioxide is peeled off from the electrode to obtain manganese dioxide in bulk.
In another embodiment of the present invention, the rinsing deacidification specifically includes the following steps:
adding the massive manganese dioxide into a rinsing barrel, rinsing with hot water,
then washing with alkali liquor to neutralize, and then back washing with dilute sulphuric acid to remove impurities until the pH value is 6.0-7.0.
Specifically, putting the massive manganese dioxide into a rinsing barrel, and firstly adding hot water for rinsing, wherein the rinsing temperature is 90 ℃, then adding 25-35% of LiOH alkali liquor for acid washing neutralization treatment until the pH value of the solution is 8-8.5, and the alkali washing temperature is 75 ℃; and back washing with 2-3% H2SO4 to eliminate impurity until pH is 6.0-7.0 and pickling temperature is 80-90 deg.c.
In still another embodiment of the present invention, the pulverization is specifically performed by pulverizing the rinsed manganese dioxide block by a pulverizer to obtain manganese dioxide powder.
Referring to fig. 2 to 10, an embodiment of the present invention further provides an impurity removing device for electrolytic manganese dioxide, which is used for magnetic separation impurity removal in the impurity removing method, and includes a magnetic separation conveying mechanism 1 and an impurity removing separation cover 3 fixed on the magnetic separation conveying mechanism 1, both ends of the impurity removing separation cover 3 are movably connected with a cover plate assembly 4, and an inner side of the impurity removing separation cover 3 and the magnetic separation conveying mechanism 1 form a magnetic separation channel; one end of the impurity removal separation cover 3 is provided with an air blast feeding assembly 5, and a rotational flow guide mechanism is further fixed inside the impurity removal separation cover 3; the rotational flow guide mechanism is used for conveying air sent by the air blowing feeding assembly 5 in a spiral mode in the magnetic separation channel.
Specifically, the magnetic separation conveying mechanism 1 comprises a conveying frame 11 and a conveying belt 12, conveying roller shafts are rotatably arranged at two ends inside the conveying frame 11, the conveying belt 12 is rotatably sleeved on the conveying roller shafts at two ends inside the conveying frame 11, electromagnet assemblies 121 are uniformly distributed inside the conveying belt 12, guide grooves 111 are symmetrically formed in two sides inside the conveying frame 11, two side edges of the conveying belt 12 are embedded in the guide grooves 111, sealing rubber gaskets are arranged on two side edges of the conveying belt 12 and are in sealing fit with the guide grooves 111, an impurity removal separation cover 3 is fixed on the magnetic separation conveying mechanism 1, a magnetic separation channel is formed between two ends of the impurity removal separation cover 3 and the magnetic separation conveying mechanism 1 through a cover plate assembly 4, when the manganese dioxide powder with simple substance iron impurities is subjected to impurity removal, the manganese dioxide powder and air are mixed to be conveyed to the magnetic separation channel in a suspension state through an air blowing and feeding assembly 5, wherein the conveying direction in the magnetic separation channel is opposite to the conveying direction of the magnetic separation conveying mechanism 1, manganese dioxide powder mixed with air and in a suspension state is conveyed in a spiral state in the magnetic separation channel under the action of a rotational flow guide mechanism in the impurity removal separation cover 3, therefore, the manganese dioxide powder mixed with air and in a suspension state is in contact with the magnetic separation conveying mechanism 1 in a reciprocating manner, the conveyer belt 12 in the magnetic separation conveying mechanism 1 performs magnetic separation on the simple substance iron impurities in the manganese dioxide powder under the action of the electromagnet assembly 121, so that the simple substance iron impurities mixed in the manganese dioxide powder can be removed and separated more completely, meanwhile, manganese dioxide powder deposited on the conveying belt 12 in the magnetic separation conveying mechanism 1 can be blown off, and the influence of the manganese dioxide powder deposited on the magnetic separation conveying mechanism 1 on magnetic separation is prevented.
In still another embodiment of the invention, the blanking pipe 2 is communicated with the cover plate component 4 on the other side of the impurity removing and sorting cover 3. Specifically, the outlet end of the discharging pipe 2 is provided with a filtering mechanism, manganese dioxide powder mixed with air in a suspension state is subjected to magnetic separation through a magnetic separation channel to remove simple substance iron impurities, then enters the discharging pipe 2, and finally is conveyed through the filtering mechanism through the discharging pipe 2 to remove air, so that finished manganese dioxide powder is obtained.
In another embodiment of the present invention, the swirling flow guiding mechanism comprises an arc-shaped protrusion 31, and a plurality of arc-shaped protrusions 31 are uniformly distributed on the top of the inner side of the impurity removing and sorting cover 3. Concretely, the inboard bottom equipartition of cover 3 is selected separately in the edulcoration sets up arc convex part 31, mix the air with manganese dioxide powder synchronous transportation through air-blast feed subassembly 5 and cross the magnetic separation passageway in, under the effect of a plurality of arc convex parts 31, make the manganese dioxide powder that is the suspended state with the air mixing be the reciprocal undulant of wave formula when carrying on its length direction in the magnetic separation passageway, also be spiral air supply, thereby make and be the reciprocal contact with magnetic separation conveying mechanism 1 of manganese dioxide powder of suspended state with the air mixing, improve the magnetic separation edulcoration effect, can blow off the manganese dioxide powder that magnetic separation conveying mechanism 1 subsides simultaneously.
In another embodiment of the present invention, the air blowing and feeding assembly 5 comprises a connecting pipe 51, the connecting pipe 51 is connected to the cover plate assembly 4 on one side of the impurity removing and sorting hood 3, an air blower 53 is arranged at the position of an outlet of the connecting pipe 51, and the connecting pipe 51 is further communicated with a feeding pipe 52. The blowing and feeding assembly 5 mixes and conveys manganese dioxide powder and air into the magnetic separation channel, specifically, the blowing fan 53 on the connecting pipe 51 sucks external air, the filtering assembly is arranged outside the blowing fan 53, dust and impurities in the air can be filtered and removed, then the manganese dioxide powder is uniformly fed into the connecting pipe 51 through the feeding pipe 52, and finally the manganese dioxide powder is fed into the magnetic separation channel through mixing.
In another embodiment provided by the present invention, preferably, a sealing cover 10 is covered on the conveying frame 11 at the outer region of the conveying belt 12, and the sealing cover 10 seals and covers the conveying belt 12, so as to prevent the conveying belt 12 from raising dust during conveying due to the exposure of the conveying belt 12, and improve the working environment.
In another embodiment of the present invention, preferably, the cover plate assembly 4 includes an end cover body 41, a circular through hole 42 is formed in a central position of the end cover body 41, an opening 43 is formed at a bottom of the end cover body 41, an air bag roller 44 is rotatably disposed inside the opening 43, and the air bag roller 44 is attached to a surface of the conveyor belt 12, so as to seal an end opening of the impurity removing and sorting cover 3. Specifically, gasbag cylinder 44 rotates sealed laminating with conveyer belt 12 surface, it rotates gasbag cylinder 44 synchronous rotation to drive during conveyer belt 12 carries promptly, gasbag cylinder 44 rotates the laminating with conveyer belt 12 surface and realizes sealing the magnetic separation passageway, when gasbag cylinder 44 rotates simultaneously, can carry out the pressfitting with conveyer belt 12 surface, the simple substance iron impurity that can not inhale conveyer belt 12 surface magnetism strikes off, it adds man-hour to be the continuous edulcoration of suspension state transport magnetic separation passageway with manganese dioxide powder and air mixture through air-blast feed subassembly 5, conveyer belt 12 in the magnetic separation conveying mechanism 1 can also synchronous reverse rotation, the work efficiency that improves, rotation through conveyer belt 12, improve continuous supplementary magnetic separation face, compare in traditional intermittent type formula magnetic separation edulcoration, show and improve magnetic separation edulcoration effect, and magnetic separation edulcoration efficiency.
In still another embodiment of the present invention, as shown in fig. 5, preferably, the spiral guiding mechanism is a spiral guiding blade 32, the spiral guiding blade 32 is fixed on the inner wall of the impurity removing separation hood 3, air and manganese dioxide powder are synchronously mixed and conveyed into the magnetic separation channel through the air blowing feeding assembly 5, under the action of the spiral guiding blade 32, manganese dioxide powder mixed with air and in a suspension state is spirally conveyed in the magnetic separation channel along the length direction thereof, so that manganese dioxide powder mixed with air and in a suspension state is in contact with the magnetic separation conveying mechanism 1 in a reciprocating manner, the magnetic separation impurity removing effect is improved, and manganese dioxide powder settled by the magnetic separation conveying mechanism 1 can be blown off.
The blast feeding assembly 5 comprises a connecting pipe 51, the connecting pipe 51 is obliquely and tangentially communicated with the circumferential surface of the impurity removing and sorting cover 3, and the inclination angle of the connecting pipe 51 is the same as the guide angle of the spiral guide vane 32.
In still another embodiment of the present invention, as shown in fig. 9, the center of the conveyor belt 12 has an arc-shaped concave portion 122, the impurity removing and sorting cover 3 has a semi-cylindrical structure, and the center of the arc-shaped concave portion 122 is located at the same position as the center of the impurity removing and sorting cover 3, the arc-shaped concave portion 122 on the conveyor belt 12 cooperates with the impurity removing and sorting cover 3 having the semi-cylindrical structure, so that the interior of the magnetic separation channel is a cylindrical structure, and cooperates with the spiral guide vane 32 to perform spiral flow guide on the manganese dioxide powder mixed with air and in a suspended state, thereby further improving the spiral conveying effect on the manganese dioxide powder mixed with air and in a suspended state, weakening the collision between the manganese dioxide powder mixed with air and in a suspended state and the inner wall of the magnetic separation channel, and improving the conveying effect of magnetic separation and impurity removal.
In still another embodiment of the present invention, as shown in fig. 10, a convex portion 45 matching with the arc-shaped concave portion 122 is provided on the specific air bag roller 44, and the port opening of the impurity removing and sorting cover 3 is sealed by attaching the convex portion 45 to the arc-shaped concave portion 122.
In another embodiment of the present invention, the inner side of the conveying belt 12 is uniformly distributed with electromagnet assemblies 121, the surface of each independent electromagnet assembly 121 is provided with a push switch, the bottom of the conveying frame 11 is provided with a feed opening 13, the inner part of the conveying frame 11 is provided with trigger switches at both sides of the opening of the feed opening 13 (along the conveying direction of the conveying belt 12), when the conveying belt 12 rotates to the position of the feed opening 13, the trigger switch at the front side of the opening of the feed opening 13 automatically acts on the switch of the electromagnet assembly 121 on the corresponding conveying belt 12, the electromagnet assembly 121 is powered off, the iron impurities magnetically absorbed thereon are separated from the surface of the conveying belt 12 and discharged from the feed opening 13, when the conveying belt 12 moves to the rear side of the opening of the feed opening 13, the trigger switch at the rear side of the opening of the feed opening 13 automatically acts on the switch of the electromagnet assembly 121 on the corresponding conveying belt 12, the electromagnet assembly 121 is energized to generate magnetism.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. The impurity removal method of electrolytic manganese dioxide comprises the steps of stripping, rinsing deacidification, crushing and magnetic separation impurity removal which are sequentially arranged, and is characterized by comprising the following steps of:
air is supplied into a magnetic separation channel with a magnetic separation conveying mechanism on the bottom surface.
2. The method for removing impurities from electrolytic manganese dioxide as claimed in claim 1, wherein a spiral wind current is formed in the magnetic separation channel by a swirl flow guide mechanism.
3. An impurity removal method for electrolytic manganese dioxide according to claim 1, wherein the stripping is carried out by stripping manganese dioxide precipitated on the electrode during electrolysis to obtain manganese dioxide in bulk.
4. An impurity removal method for electrolytic manganese dioxide according to claim 1, wherein the rinsing deacidification specifically comprises the following steps:
adding blocky manganese dioxide into a rinsing barrel, and rinsing with hot water, wherein the rinsing temperature is 90 ℃;
then washing with alkali liquor to neutralize, and then back washing with dilute sulphuric acid to remove impurities until the pH value is 6.0-7.0.
5. An impurity removal method for electrolytic manganese dioxide according to claim 1, wherein the pulverization is carried out by pulverizing the rinsed manganese dioxide block by a pulverizer to obtain manganese dioxide powder.
6. An impurity removing device for electrolytic manganese dioxide, which is used for magnetic separation impurity removal of the impurity removing method according to any one of claims 1 to 5, and comprises a magnetic separation conveying mechanism (1) and an impurity removing separation cover (3) fixed on the magnetic separation conveying mechanism (1), wherein both ends of the impurity removing separation cover (3) are movably connected with cover plate assemblies (4), and the inner side of the impurity removing separation cover (3) and the magnetic separation conveying mechanism (1) form a magnetic separation channel;
one end of the impurity removal separation cover (3) is provided with an air blowing feeding assembly (5), and a rotational flow guide mechanism is further fixed inside the impurity removal separation cover (3);
the rotational flow guide mechanism is used for conveying air sent by the air blowing feeding assembly (5) in the magnetic separation channel in a spiral mode.
7. The impurity removing device for electrolytic manganese dioxide according to claim 6, wherein the other side cover plate component (4) of the impurity removing and sorting cover (3) is communicated with a feeding pipe (2).
8. The impurity removing device for electrolytic manganese dioxide according to claim 6, wherein the swirling flow guiding means is an arc-shaped protrusion (31), and a plurality of arc-shaped protrusions are uniformly distributed on the top of the inner side of the impurity removing and sorting cover (3).
9. The impurity removing device for electrolytic manganese dioxide according to claim 6, wherein the air blowing and feeding assembly (5) comprises a connecting pipe (51), the connecting pipe (51) is connected to the cover plate assembly (4) at one side of the impurity removing and sorting cover (3), an air blower (53) is arranged at an outlet position outside the connecting pipe (51), and the connecting pipe (51) is communicated with a feeding pipe (52).
10. The impurity removing device for electrolytic manganese dioxide according to claim 6, wherein the magnetic separation conveying mechanism comprises a conveying frame (1), a conveying belt (2) is rotatably sleeved on the conveying frame (1), and electromagnet assemblies (21) are uniformly arranged in the conveying belt (2).
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| CN114634207A (en) * | 2022-03-17 | 2022-06-17 | 广西下田锰矿有限责任公司 | Rinsing and drying process and crushing and drying device for electrolytic manganese dioxide powder |
| CN116586189A (en) * | 2023-07-14 | 2023-08-15 | 济南绿霸农药有限公司 | Impurity remover for abamectin water dispersible granule production |
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