CN211101405U - High-efficient screening plant of molding sand - Google Patents
High-efficient screening plant of molding sand Download PDFInfo
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- CN211101405U CN211101405U CN201922218910.8U CN201922218910U CN211101405U CN 211101405 U CN211101405 U CN 211101405U CN 201922218910 U CN201922218910 U CN 201922218910U CN 211101405 U CN211101405 U CN 211101405U
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Abstract
The utility model discloses a high-efficient screening plant of molding sand, mainly used molding sand is retrieved or the screening stage in the production process, and degree of automation is higher, and its structure includes: the sand-sand separation device comprises a shell, a separation cylinder, a hot air blower and a drying wheel, wherein the separation cylinder separates molding sand and impurity through solution by utilizing the difference of the densities of the molding sand and the impurity, a filter screen and a rotary magnetic head are arranged in a separation cavity to filter and discharge the impurity, the rotary magnetic head can separate metal impurities or metal particles, after the metal impurities or the metal particles are introduced into the drying wheel, the centrifugal force generated by rotation is utilized to be matched with the hot air blower to remove and dry the water in the metal impurities or the metal particles, and a crushing ball can crush the molding sand to enable the particle size of the molding sand to be; the utility model discloses rational in infrastructure, can effectively with impurity separation and rapid draing wherein, and can not produce pollution such as dust in the use, avoid causing the injury to the user.
Description
Technical Field
The utility model belongs to quartzy sand treatment facility, concretely relates to high-efficient screening plant of molding sand.
Background
The molding sand is used for a molten metal forming material, quartz sand is mostly adopted, when the molding sand is used, the molding sand is molded and formed, the shape of the molding sand is fixed by using an adhesive, the formed molding sand can be directly poured with molten metal, and the used molding sand can be directly used after being treated, so that the molding sand has the advantages of high production efficiency, low production cost and short production period, in the traditional casting production, the adhesive can be attached to the surface of a molding sand grinding tool under the high-temperature baking of the high-temperature molten metal, and a small amount of metal can be solidified in the molding sand, so that the subsequent recovery treatment is challenged; in addition, in the preparation process of the molding sand, a large amount of earth and stone particles or other associated mineral particles exist in the crushed molding sand, the impurities are difficult to take out only by physical screening, and are often removed by acid washing, and the purity of the molding sand can be improved.
The prior art does not have equipment which can be used for sand recovery and sand preparation at the same time, and the screening equipment adopted for sand recovery is used for separating sand blocks adhered with binders through a vibrating screen after the sand is ground, and then performing the subsequent separation process, and because in the using process, the vibrating screen separation can only be used for separating sand with different sizes, smaller metal nodules in the sand particles can not be effectively removed, and the vibrating screen separation time is longer, so that a large amount of dust is easily generated, and the physical health of workers is influenced; and screening and pickling equipment used in the field of molding sand preparation is mostly a traditional vibrating screen and a traditional reaction kettle, manual operation is needed between the two processes, and the labor intensity is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient screening plant of molding sand not only can solve the problem that the recovery in-process screening effect is not good of molding sand, can be used in the molding sand preparation in-process moreover, improves the degree of automation in the molding sand preparation process, reduces intensity of labour.
In order to realize the technical purpose, the utility model discloses a technical scheme:
the utility model provides a high-efficient screening plant of molding sand, includes casing, separation jar, air heater, drying wheel, the casing includes: the device comprises a discharge bin, an auxiliary fan, a collecting net and a feed inlet, wherein the top surface of a shell is provided with the feed inlet, the discharge bin is in a strip shape and is arranged at the position where the bottom surface of the shell and the projection of the shell in the horizontal plane are the same, the collecting net is arranged in the discharge bin and is fixed on the shell, a baffle plate is not arranged at the connecting part of the discharge bin and the collecting net, the two parts are directly communicated, the auxiliary fan is also arranged on the side surface inside the discharge bin, and the bottom of the discharge bin is also provided with a through hole for;
the bottom surface of the interior of the separation cylinder is an inclined plane, the lower end of the inclined plane is close to the discharge hole, a primary filter screen is also obliquely arranged in the separation cylinder, the inclination direction of the primary filter screen is opposite to that of the bottom surface of the separation cylinder, the lower end of the primary filter screen is provided with a waste hole, and the primary filter screen is also provided with an aeration pipe;
the drying wheel comprises a rotating wheel and a rotating motor, the rotating motor is fixed on the side surface of the inner wall of the shell, the rotating motor is connected with the circle center of the bottom surface of one side of the rotating wheel, a through hole is formed in the circle center of the bottom surface of the other side of the rotating wheel, one end of the discharge hole is located in the through hole, and filter holes are uniformly formed in the side surface of the rotating wheel;
the air heater is located the drying wheel top, includes: the heating device comprises a heating net and a main fan, wherein a plurality of through holes are formed in the position, where the air heater is installed, of the shell, and the heating net is arranged below the main fan.
Furthermore, a plurality of filter screen washing pipes are uniformly arranged on one higher side of the primary filter screen, and the water outlets of the filter screen washing pipes are the same as the inclination angle of the primary filter screen; and a plurality of sinking material flushing pipes are also arranged on the higher edge of the separation cylinder, the sinking material flushing pipes are all vertically arranged, and the outlets of the sinking material flushing pipes penetrate through the primary filter screen and are close to the bottom surface of the separation cylinder.
Further, still include rotatory magnetic head, rotatory magnetic head comprises dwang, magnetic stripe, motor, and motor demountable installation is outside the casing, and dwang one end is connected with the motor, and the other end is located primary filter screen below for passing casing, primary filter screen, and this tip side is provided with the magnetic stripe with dwang side vertically.
Furthermore, the runner is also provided with a crushing ball, the diameter of the crushing ball is larger than that of the filtering hole, and the crushing ball is of a solid or hollow structure.
The utility model discloses following beneficial effect has at least:
(1) the rotating magnetic head can fully stir the liquid in the separating cylinder, so that the molding sand and the impurities can be effectively separated.
(2) The drying wheel rotates the in-process, and wherein frequent interact of broken ball and molding sand avoids caking among the molding sand drying process to make it to pass the through-hole on the runner with the great molding sand of particle size is broken.
(3) Through two fans of main fan, auxiliary fan simultaneous workings, the gas flow is more smooth and easy, and drying, dehydration process are more high-efficient.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 schematically shows a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 schematically shows a schematic structural diagram of embodiment 2 of the present invention;
wherein the figures include the following reference numerals:
1-shell, 11-discharge bin, 12-auxiliary fan, 13-collection net, 14-feed inlet, 2-separation cylinder, 21-primary filter screen, 22-filter screen flushing pipe, 23-sediment flushing pipe, 24-waste port, 25-rotary magnetic head, 251-rotary rod, 252-magnetic strip, 253-motor, 26-aeration pipe, 27-discharge port, 28-fixing frame, 31-heating net, 32-main fan, 41-rotary wheel, 42-crushing ball, 43-rotary motor and 44-induced air arc plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure; unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application; as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …, above," "overlying" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures; it will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
Example 1
This embodiment mainly is used in the screening stage of molding sand recovery in-process, and degree of automation is higher, and in the middle of the molding sand recovery process, mainly there are two kinds of impurity to handle, one kind is exactly the molding sand that is stained with the binder, and another kind is exactly the remaining metal of pouring in-process, for better screening, adopts following structure, includes: casing 1, separation jar 2, the air heater, the drying wheel, separation jar 2 utilizes the molding sand and impurity density's difference, separate the two through solution, and set up filter screen and rotatory magnetic head 25 in the separation chamber, filter and discharge impurity, rotatory magnetic head 25 can be with metal impurity or metal particle separation wherein, after letting in the drying wheel, utilize the centrifugal force cooperation air heater that the rotation produced to come out moisture desorption and drying wherein, broken ball 42 wherein can also be broken the molding sand, make its particle diameter littleer.
As shown in fig. 1, the housing 1 includes: the discharging bin 11, the auxiliary fan 12, the collecting net 13 and the feeding port 14, the shell 1 is a cuboid box body, the separating cylinder 2, the air heater and the drying wheel are placed in the box body, the feeding port 14 is arranged on the top surface of the shell 1, the molding sand is thrown into the separating cylinder 2 in the shell 1 from the feeding port, a cover plate is arranged on the feeding port 14, the shell 1 is sealed through the cover plate, the dust generated in the using process is prevented from escaping into the air, the strip-shaped discharging bin 11 is arranged on the bottom surface of the shell 1, the discharging bin 11 is positioned outside the shell 1 and is the same as the projection position of the rotating wheel 41 on the horizontal plane at the connecting position of the shell 1, the collecting net 13 is arranged in the discharging bin 11, the collecting net 13 is fixed on the shell 1, the connecting position of the discharging bin and the collecting net 13 is not provided with a baffle, the two parts are directly communicated, the molding sand, guarantee that the molding sand can not fall out but moisture can from the flowing out, and can not store up in collecting net 13, go out on 11 inside sides in feed bin, still be provided with auxiliary fan 12, auxiliary fan 12 will go out the outside discharge of air in feed bin 11, avoid leading to casing 1 interior gas to be difficult to quick discharge because of collecting that the net 13 space is less, go out feed bin 11 bottom and still be provided with the through-hole that is used for the exhaust liquid, avoid the moisture siltation.
The top surface of the separating cylinder 2 is open and is used for containing liquid, the bottom of the separating cylinder 2 is provided with a fixing frame 28, the separating cylinder 2 is fixed in the shell through the fixing frame 28, the bottom surface of the separating cylinder 2 is the same as the height of the circle center of the drying wheel, and further after a discharge hole 27 of the separating cylinder 2 is communicated with the circle center of the drying wheel, molding sand separated from the separating cylinder 2 can enter the drying wheel through the discharge hole 27 without influencing the rotation of the rotating wheel 41, the bottom surface inside the separating cylinder 2 is an inclined plane, the lower end of the inclined plane is close to the discharge hole 27, so that the molding sand deposited at the bottom of the separating cylinder 2 can be discharged from the discharge hole 27 without depositing on the bottom surface, a primary filter screen 21 is also obliquely arranged in the separating cylinder 2, the inclination direction of the primary filter screen 21 is opposite to the inclination direction of the bottom surface of the separating cylinder 2, the liquid level in the separating cylinder 2 is divided into, be located the waste material on upper strata after being used for discharging the separation, still be provided with aeration pipe 26 on the primary filter screen 21, aeration pipe 26 is with external gas source intercommunication, and the surface evenly is provided with the pipeline of through-hole, after ventilating, gas can release in the liquid of separation jar 2 with the form of bubble, through bubble disturbance molding sand, the molding sand that makes to have the binder in the molding sand can be dispersed and float in liquid or the volume is too big can't stay the upper strata through primary filter screen 21, the molding sand can pass the lower floor of primary filter screen 21 deposit to liquid, realize the separation of molding sand and impurity, when using, open waste opening 24 earlier, discharge waste opening 24 through waste opening 24, reopen discharge gate 27, discharge the molding sand from discharge gate 27, realize effective separation, compare in traditional shale shaker separation, the separating speed is faster, and the in-process can not produce the dust.
It should be noted that: a plurality of filter screen washing pipes 22 are uniformly arranged on one higher edge of the primary filter screen 21, the water outlets of the filter screen washing pipes 22 have the same inclination angle with the primary filter screen 21, the surface of the primary filter screen 21 can be washed after water is introduced, impurities on the surface of the primary filter screen 21 are cleaned, and the washing coverage area can be increased by the aid of the plurality of filter screen washing pipes 22; similarly, the higher edge of the inside bottom surface of separation jar 2 still is equipped with a plurality of sediment washpipes 23, and sediment washpipe 23 all sets up vertically, and its export passes primary filter screen 21 and is close to separation jar 2 bottom surface, and the rivers that sediment washpipe 23 produced can wash away the molding sand that fails to discharge in separation jar 2 bottom.
The separating cylinder 2 is also provided with a rotary magnetic head 25, the rotary magnetic head 25 is composed of a rotating rod 251, a magnetic strip 252 and a motor 253, as shown in fig. 1, the motor 253 is detachably installed outside the shell 1, one end of the rotating rod 251 is connected with the motor 253 and is driven by the motor 253 to rotate, the other end is a free end, the rotating rod passes through the shell 1, the primary filter screen 21 is positioned below the primary filter screen 21, the side surface of the free end is provided with the magnetic strip 252 vertical to the side surface, molding sand deposited on the lower layer is disturbed in the rotating process, metal impurities in the molding sand are adsorbed by the magnetic force of the magnetic strip 252, and the rotary magnetic head 25 is not used when the molding sand is used.
The drying wheel includes runner 41, rotating electrical machines 43, runner 41 is cylindrical, rotating electrical machines 43 fixes the side at casing 1 inner wall, rotating electrical machines 43 is connected with runner 41 one side bottom surface centre of a circle, and it takes place to rotate to drive runner 41, the centre of a circle department of runner 41 opposite side bottom surface is provided with the through-hole, the one end of discharge gate 27 is located wherein, but this through-hole does not contact with discharge gate 27, avoid hindering runner 41's motion, runner 41 side evenly is provided with the filtration pore, the size of filtration pore is the same with the maximum value of molding sand particle diameter scope, at runner 41 rotation in-process, water can be given off from the filtration pore by centrifugal force, dewater the molding sand, casing 1 inner wall bottom surface still is provided with the logical groove with collection net 13 intercommunication, this logical groove that the rotation wheel rotated in-process and filtered out gets into and is retrieved in collection net.
Still be provided with the air heater on the top surface of 1 inner wall of casing, the air heater is located the drying wheel top, and its structure includes: heating net 31, main fan 32, the position that the air heater was installed to casing 1 is provided with a plurality of through-holes, main fan 32 during operation, push external air current to casing 1 in, main fan 32 below is provided with heating net 31, the heating net 31 generates heat after the circular telegram, heat the air current that main motor produced, the hot-blast direct action that produces is on runner 41, the drying of molding sand in runner 41 accelerates, vertical air current can also avoid the molding sand that filters out to scatter everywhere simultaneously.
It should be noted that: still be provided with induced air arc board 44 on this logical groove's the twice edge, induced air arc board 44 outwards opens, and the molding sand that falls on induced air arc board 44 also can be retrieved, reduces extravagantly, can also increase the area of catching wind simultaneously, and the increase is from collecting the gas quantity that net 13 flows.
Further, broken ball 42 has still been placed in runner 41, the ball footpath of broken ball 42 is greater than the filtration pore, broken ball 42 is hollow aluminum ball, the outer cladding of broken ball has rubber, the quality is very light, when runner 41 rotational speed is lower, broken ball 42 moves and can be thrown down after the take the altitude, and pound on the molding sand, smash the hardened molding sand of dehydration in-process, the vibrations that the striking produced simultaneously can not hard up the molding sand, avoid the molding sand adhesion in the runner inboard, because the quality is lighter, the collision can not further broken molding sand, can keep the sphericity of molding sand as far as possible, do not influence follow-up use.
The method of use of this example is as follows:
firstly, the molding sand is poured into the separating cylinder 2 through the feeding hole 14, the separating cylinder 2 is filled with liquid, the liquid level of the liquid is higher than that of the primary filter screen 21, the aeration pipe 26 disturbs the molding sand, so that the molding sand attached with the adhesive floats on the water surface, the rest molding sand passes through the primary filter screen 21 and sinks to the lower layer, the molding sand of the lower layer is disturbed by the rotary magnetic head 25, metal impurities in the molding sand are adsorbed on the magnetic strip 252, after a period of treatment, the waste material hole 24 is opened, the filter screen flushing pipe 22 is opened to flush the primary filter screen 21, after the flushing is finished, the filter screen flushing pipe 22 is closed, the discharge hole 27 is opened, the molding sand enters the rotating wheel 41 along with water flow, the sinking flushing pipe 23 is opened to flush the residual molding sand into the rotating wheel 41, the rotating wheel 41 rotates at a higher speed firstly, the water between the molding sand is separated out by using centrifugal force, after rotating for a period of time at a high speed, the rotating speed is reduced, so that the crushing balls 42 do not rotate along with the rotating wheel 41 in a whole circle during rotation, are thrown out at a certain height and hit on the molding sand, and the molding sand is not adhered to the rotating wheel or hardened into blocks by repeatedly hitting the crushing balls 42, and can pass through the rotating wheel in the form of sand grains to be collected in the collection net 13.
As a preferred embodiment, the liquid in the separation cylinder 2 is water.
Example 2
This example was used in the screening step in the preparation of molding sand, and differs from example 1 by three points: firstly, the liquids in the separating cylinder 2 are different, the acid used in the embodiment can be hydrochloric acid or sulfuric acid; the other point is that the rotary head 25 is not included because the kind of impurities is different; the last point is that the structure of the crushing ball is different.
Particularly, the main impurity source in the preparation process is the great slabstone of volume exactly, the slabstone is the material such as calcium carbonate mostly, get into in the molding sand in the exploitation process, consequently partly can sieve through the filter screen and remove, but just can't discharge the slabstone that the volume is littleer through the filter screen, consequently need cooperate acid to react, because hydrochloric acid or sulphuric acid do not react with the quartzite, and the slabstone can react with acid, so can get rid of impurity, and improve the quality of quartzite, prior art does not have special equipment to the pickling of molding sand, the drying after the pickling is all mainly through manual operation, and high labor strength, the structure of adopting this embodiment can reduce intensity of labour.
Further, the work of transfer wheel 41 has two kinds of modes in this embodiment, one kind is the dehydration mode, one kind is the fine grinding mode, the difference lies in the rotational speed difference, the rotational speed of dehydration mode is very fast, utilize centrifugal force to break away from out with remaining water between the molding sand, the heating of cooperation air heater, can be faster with the molding sand drying, and the rotational speed of fine grinding mode is slower, broken ball 42 can not be rotatory along with the whole circle of runner 41 during the rotation, can be thrown out and hit on the molding sand when a take the altitude, hit repeatedly through broken ball 42 and break the great molding sand of volume, and the molding sand that the particle diameter is less than the filtration pore is being filtered out along with the pivoted in-process of rotary drum, the molding sand after filtering out gets into and is collected in collecting net 13.
Wherein, the sphere diameter of broken ball 42 is greater than the filtration pore, and broken ball 42 is solid cast iron ball, has certain weight, and in the fine grinding stage, the rotational speed of runner 41 reduces for broken ball 42 can be thrown down after moving to certain height, and smash on the molding sand, under the repeated action, makes the great molding sand of particle diameter broken, and the less molding sand of particle diameter can pass the filtration pore and get into and collect in the net 13.
Furthermore, water is still led into the filter screen flushing pipe 22 and the sediment flushing pipe 23, so that the using amount of acid is saved, the sediment flushing pipe 23 can be opened before the dehydration stage, meanwhile, the rotating wheel 41 is rotated, the acid liquor remained between the molding sand is removed by water flow, and then the dehydration stage and the fine grinding stage are sequentially carried out to obtain a finished product.
As a preferred example, the acid used in this example is 6 mol/L hydrochloric acid.
In the above embodiments, the main blower, the auxiliary blower, the magnetic stripe, the motor, and the heating net are all mature prior arts, and can be purchased directly, so detailed description is omitted.
Claims (4)
1. The utility model provides a high-efficient screening plant of molding sand which characterized in that: including casing, separation jar, air heater, drying wheel, the casing includes: the device comprises a discharge bin, an auxiliary fan, a collecting net and a feed inlet, wherein the top surface of a shell is provided with the feed inlet, the discharge bin is in a strip shape and is arranged at the position where the bottom surface of the shell and the projection of the shell in the horizontal plane are the same, the collecting net is arranged in the discharge bin and is fixed on the shell, a baffle plate is not arranged at the connecting part of the discharge bin and the collecting net, the two parts are directly communicated, the auxiliary fan is also arranged on the side surface inside the discharge bin, and the bottom of the discharge bin is also provided with a through hole for;
the separation cylinder is filled with liquid, the bottom surface inside the separation cylinder is an inclined plane, the lower end of the inclined plane is close to the discharge hole, a primary filter screen is also obliquely arranged in the separation cylinder, the inclination direction of the primary filter screen is opposite to that of the bottom surface of the separation cylinder, a waste material hole is arranged at the lower end of the primary filter screen, and an aeration pipe is also arranged on the primary filter screen;
the drying wheel comprises a rotating wheel and a rotating motor, the rotating motor is fixed on the side surface of the inner wall of the shell, the rotating motor is connected with the circle center of the bottom surface of one side of the rotating wheel, a through hole is formed in the circle center of the bottom surface of the other side of the rotating wheel, one end of the discharge hole is located in the through hole, and filter holes are uniformly formed in the side surface of the rotating wheel;
the air heater is located the drying wheel top, includes: the heating device comprises a heating net and a main fan, wherein a plurality of through holes are formed in the position, where the air heater is installed, of the shell, and the heating net is arranged below the main fan.
2. The efficient molding sand screening device according to claim 1, characterized in that: a plurality of filter screen washing pipes are uniformly arranged on the higher edge of the primary filter screen, and the water outlets of the filter screen washing pipes are the same as the inclination angle of the primary filter screen; and a plurality of sinking material flushing pipes are also arranged on the higher edge of the separation cylinder, the sinking material flushing pipes are all vertically arranged, and the outlets of the sinking material flushing pipes penetrate through the primary filter screen and are close to the bottom surface of the separation cylinder.
3. The efficient molding sand screening device according to claim 1, characterized in that: still include rotatory magnetic head, rotatory magnetic head comprises dwang, magnetic stripe, motor, and motor demountable installation is outside the casing, and dwang one end is connected with the motor, and the other end is located the prefilter screen below for passing casing, prefilter screen, and this tip side is provided with dwang side vertically magnetic stripe.
4. The efficient molding sand screening device according to claim 1, characterized in that: the runner is also provided with a crushing ball, the diameter of the crushing ball is larger than that of the filtering hole, and the crushing ball is of a solid or hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922218910.8U CN211101405U (en) | 2019-12-12 | 2019-12-12 | High-efficient screening plant of molding sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922218910.8U CN211101405U (en) | 2019-12-12 | 2019-12-12 | High-efficient screening plant of molding sand |
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| CN211101405U true CN211101405U (en) | 2020-07-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113662475A (en) * | 2021-08-26 | 2021-11-19 | 无锡睿米信息技术有限公司 | Floor sweeping and mopping robot and base |
| CN115092955A (en) * | 2022-07-08 | 2022-09-23 | 萍乡宝海锌营养科技有限公司 | Intelligent production device of high-purity zinc sulfate monohydrate |
-
2019
- 2019-12-12 CN CN201922218910.8U patent/CN211101405U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113662475A (en) * | 2021-08-26 | 2021-11-19 | 无锡睿米信息技术有限公司 | Floor sweeping and mopping robot and base |
| CN115092955A (en) * | 2022-07-08 | 2022-09-23 | 萍乡宝海锌营养科技有限公司 | Intelligent production device of high-purity zinc sulfate monohydrate |
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Effective date of registration: 20220519 Address after: 657400 Yishao villager group, Weijia village, Jili Town, Daguan County, Zhaotong City, Yunnan Province Patentee after: Ruihua silicon industry (Daguan) Co.,Ltd. Address before: 657400 Shapo, Yutian village, Jili Town, Daguan County, Zhaotong City, Yunnan Province Patentee before: Daguan Huaxin Mining Co.,Ltd. |
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