CN116067173B - Rotary kiln with cooling, crushing and screening functions and application thereof - Google Patents
Rotary kiln with cooling, crushing and screening functions and application thereof Download PDFInfo
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- CN116067173B CN116067173B CN202310358403.2A CN202310358403A CN116067173B CN 116067173 B CN116067173 B CN 116067173B CN 202310358403 A CN202310358403 A CN 202310358403A CN 116067173 B CN116067173 B CN 116067173B
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- rotary kiln
- crushing
- kiln body
- cooling
- plate
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
- B02C17/06—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/38—Arrangements of cooling devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Means For Separation Of Solids (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention relates to rotary kiln equipment, in particular to a rotary kiln with cooling and crushing and screening functions and application thereof, comprising a rotary kiln body, wherein a crushing and screening device is arranged on the rotary kiln body; comprises a crushing mechanism and a screening mechanism; the crushing mechanism comprises a compression roller and a separation plate; inside the rear section of the rotary kiln body, a partition plate is axially arranged, through holes are formed in the center and the periphery of the partition plate, and a compression roller is arranged between every two adjacent partition plates; the screening mechanism comprises blanking holes, a steel plate net, a screen and a vertical plate; a plurality of blanking holes are uniformly formed in the side wall of the rear section of the rotary kiln body, a steel plate net is arranged on each blanking hole, a vertical plate is vertically fixedly connected to the periphery of each blanking hole, and a screen is arranged on the vertical plate. The invention improves the cooling effect and efficiency; the outer screen with different apertures can be replaced at will according to the requirements of materials, the application range is wide, and the use effect is good.
Description
Technical Field
The invention relates to rotary kiln equipment, in particular to a rotary kiln with cooling, crushing and screening functions and application thereof.
Background
Sand control resin sand is a sand control agent used in oilfield exploitation. In the exploitation process of an oil field, the construction operation damages sandstone of the oil well or the sandstone in the well is cemented and loose, so that the oil well produces a large amount of sand to cause serious consequences such as pump blockage, sand burying of an oil layer and the like, and the petroleum yield is reduced or even stopped. Sand control resin sand is one kind of sand control agent for downhole sand production, and is driven into stratum and solidified to prevent the stratum from producing sand.
The sand control resin sand is formed by wrapping a layer of solid resin on the surface of sand grains. The formulation of the resin varies according to the application. The sand-preventing resin sand is produced by two production processes, namely a cold method and a hot method. The cold method process is to dissolve the resin with ethanol, directly mix and stir the resin with sand grains to uniformly wrap the resin on the surfaces of the sand grains, and volatilize the ethanol to obtain the sand control resin sand. The thermal process is to dry and preheat sand grains to a certain temperature, add resin, melt the resin at a high temperature, stir the resin to coat the resin on the surface of the sand grains, cool, crush and screen the sand grains to obtain sand-preventing resin sand.
The existing technology of sand prevention resin sand is that sand is preheated, mixed with resin, stirred, cooled, crushed and screened. The cooling of sand control resin sand needs to be fast cooled to prevent resin from absorbing moisture and caking. The breaking method of the prior art can cause the coated resin to fall off, the fallen resin is broken into powder, a large amount of solid waste is formed, and the yield is low and the cost is high.
For example, in the "a cooling water pipe structure of a water-cooled rotary kiln (patent No. 202021922786. X)", the cooling water pipe structure applied to the rotary kiln in this solution is disposed in an inner layer of the rotary kiln, and absorbs heat through cooling water in the water-cooled pipe to reduce the temperature of the refractory material layer, and the cooling water pipe is disposed inside the water-cooled rotary kiln to prevent maintenance and further to prevent maintenance.
Further, as disclosed in the Chinese patent document (patent number: 2008201062363), the rotary kiln is internally provided with a crushing device, and gravity broken pieces are additionally arranged in a furnace chamber to perform the effect of crushing materials, but the number of gravity broken pieces is large, the crushing area is small, the stress is uneven, and the crushing effect is poor; the grate net is arranged at the outlet to play a screening role, but one layer of grate net is easy to be broken by gravity and quickly repeatedly impacted, so that the grate net is broken, and the use is affected.
Disclosure of Invention
The invention aims at the technical defects in the background art, firstly provides a rotary kiln with cooling, crushing and screening functions, and secondly provides application of the rotary kiln in production of sand-preventing resin sand.
The technical scheme adopted by the invention is as follows: the rotary kiln with the cooling, crushing and screening functions comprises a rotary kiln body, wherein a crushing and screening device is arranged on the rotary kiln body;
the crushing and screening device is arranged at the rear section of the rotary kiln body and comprises a crushing mechanism and a screening mechanism;
the crushing mechanism comprises a compression roller and a separation plate; inside the rear section of the rotary kiln body, a plurality of partition plates are uniformly arranged along the axial direction, through holes are formed in the center and the periphery of each partition plate, and a partition space is formed by the rotary kiln body between every two adjacent partition plates; a press roller is arranged in each partition space;
the screening mechanism comprises blanking holes, a steel plate net, a screen and a vertical plate; a plurality of blanking holes are uniformly formed in the side wall of the rear section of the rotary kiln body, a steel plate net is arranged on each blanking hole, a vertical plate is vertically fixedly connected to the periphery of each blanking hole, and a screen is arranged on the vertical plate.
As a preferable technical scheme, the rotary kiln further comprises a cooling device, wherein the cooling device is arranged at the front section of the rotary kiln body and comprises a water cooling mechanism and an air cooling mechanism;
the water cooling mechanism comprises an annular supporting frame and spray nozzles, the annular supporting frame is erected above the front section of the rotary kiln body, and the spray nozzles are uniformly distributed on the inner side surface of the annular supporting frame;
the air cooling mechanism comprises a fan which is arranged outside a feeding port of the front section of the rotary kiln body.
As a preferable technical scheme: the lower part of the front section of the rotary kiln body is provided with a collecting water tank for collecting the drainage water of the water cooling mechanism and is connected with a water supply facility through a pipeline.
As a preferable technical scheme: the front section of the rotary kiln body is provided with a plurality of groups of water cooling mechanisms in parallel along the axis direction.
As a preferable technical scheme: the partition plate comprises a central hole and peripheral material leakage holes, and a connecting sheet between adjacent material leakage holes is fixedly connected with the inner wall of the rotary kiln body; the peripheral plate body of the central hole forms an annular baffle plate.
As a preferable technical scheme: the central axis of the compression roller is lower than the inner edge of the baffle plate.
As a preferable technical scheme: the blanking holes are strip holes, high-strength steel plate meshes are arranged on the empty surfaces of the strip holes, and the peripheries of the steel plate meshes are fixedly connected with the rotary kiln body.
As a preferable technical scheme: and a vertical plate is arranged outside the blanking hole and is perpendicular to the outer side wall of the rotary kiln body.
As a preferable technical scheme: the screen is installed on the vertical plate, the outer edge of the screen is fixed through a double-layer clamping plate, and the lower-layer clamping plate is connected with the upper surface of the vertical plate.
As a preferable technical scheme: at least two blanking holes are uniformly distributed on the rotary kiln body in each partition space.
As a preferable technical scheme: the rotary kiln with the functions of cooling, crushing and screening is applied to the production of sand control resin sand.
Compared with the prior art, the rotary kiln with the cooling, crushing and screening functions disclosed by the invention is innovatively improved on the basis of the prior art, so that the radiation area of a cooling device is increased, water cooling and air cooling are alternately used according to actual conditions, and the cooling effect and efficiency are improved; the crushing and screening device rolls and rolls through the press roller, the crushing stress surface is uniform and even, the crushing effect and efficiency are improved, and the press roller cannot directly contact the screen mesh in the crushing process, so that the screen mesh is damaged; double-deck screen cloth structure not only realizes the screening to the material, improves the finished product qualification rate, can change the outer screen cloth of different apertures at will according to the demand of material moreover, and the application scope is wide, excellent in use effect.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a schematic diagram of a water cooling mechanism.
Fig. 3 is a schematic view of the crushing and screening device.
Fig. 4 is a schematic view of a press roller setting position.
Fig. 5 is a schematic view of the structure of the partition plate.
Fig. 6 is a schematic view of a screen structure.
In the figure: the rotary kiln comprises a rotary kiln body 1, a cooling device 2, a crushing and screening device 3, an annular supporting frame 2-1, a nozzle 2-2, a partition plate 3-1, a partition space 3-2, blanking holes 3-3, a press roller 3-4, a material leakage hole 3-5, a connecting sheet 3-6, a central hole 3-7, a baffle plate 3-8, a steel plate net 3-9, a screen 3-10 and a vertical plate 3-11.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Referring to fig. 1 to 6, the rotary kiln with cooling and crushing screening functions disclosed in the present invention comprises a rotary kiln body 1, and the rotary kiln is supported and rotated by a supporting member (not shown). The rotary kiln body 1 is provided with a cooling device 2 and a crushing and screening device 3 in sequence along the working direction. The whole rotary kiln body 1 is divided into a front section and a rear section along the length direction of the rotary kiln body, the front section is used for cooling and pelletizing the stirred high-temperature sand control resin sand, and the rear section is used for rolling, crushing and sieving the sand control resin sand which is in a spherical particle state.
The cooling device is arranged at the front section of the rotary kiln body and comprises a water cooling mechanism and an air cooling mechanism. As a preferable embodiment, the water cooling mechanism comprises an annular supporting frame 2-1 and nozzles 2-2, the annular supporting frame 2-1 is erected above the front section of the rotary kiln body, and the nozzles 2-2 are uniformly distributed on the inner side surface of the annular supporting frame 2-1. The pipeline is arranged on the annular supporting frame 2-1 and is connected with a plurality of nozzles 2-2. The other end of the pipeline is connected with water supply equipment to realize water supply, and cooling water is sprayed through a nozzle to cool the kiln body, so that the high-temperature sand-preventing resin sand in the kiln body is cooled. As the preferable technical scheme, the below of the anterior segment of rotary kiln body is provided with the collection water tank, and the water tank is rectangular shape structure, arranges the below of the anterior segment of rotary kiln body in, and both contactless, the drainage that the collection water tank is used for collecting water-cooling mechanism to be connected with water supply facility through the pipeline, realize the circulation use of cooling water.
As a preferable scheme, the front section of the rotary kiln body is provided with a plurality of groups of water cooling mechanisms in parallel along the axis direction.
As a preferred embodiment, the air cooling mechanism comprises a fan which is arranged outside a feed port of the front section of the rotary kiln body; when in use, the cooling device can be temporarily installed to realize double cooling, and the installation position and the wind direction are shown by the arrow on the right side in fig. 1. When the humidity of the field environment is high, air cooling cannot be used, so that the cooled resin sand is prevented from absorbing moisture. The two cooling modes can determine whether to use at the same time or only one according to the actual temperature, the ambient temperature and the on-site humidity during production.
The crushing and screening device 3 is arranged at the rear section of the rotary kiln body and comprises a crushing mechanism and a screening mechanism.
The crushing mechanism comprises a press roller 3-4 and a partition plate 3-1. Inside the rear section of the rotary kiln body, a plurality of partition plates 3-1 are uniformly arranged along the axial direction, through holes are formed in the center and the periphery of each partition plate 3-1, and a partition space 3-2 is formed by the rotary kiln body between adjacent partition plates; each partition space is internally provided with a pressing roller 3-4. As a preferred embodiment, the partition plate 3-1 comprises a central hole 3-7 and peripheral material leakage holes 3-5, and a connecting sheet 3-6 between adjacent material leakage holes 3-5 is fixedly connected with the inner wall of the rotary kiln body; the peripheral plate body of the central hole 3-7 forms an annular baffle plate 3-8. The central axis of the press roller 3-4 is lower than the inner edge of the baffle plate 3-8, so that the press roller is prevented from axial displacement in the rotary kiln rotating process, and one press roller 3-4 is arranged in each partition space. The material is moved by the center hole 3-7 and the leakage hole 3-5 of the partition plate, and the compression roller rolls the cooled sand-preventing resin sand along with the rotation of the rotary kiln.
The screening mechanism comprises blanking holes 3-3, a steel plate net 3-9, a screen 3-10 and a vertical plate 3-11. A plurality of blanking holes 3-3 are uniformly formed in the side wall of the rear section of the rotary kiln body, a steel plate net 3-9 is arranged on each blanking hole, a vertical plate 3-11 is vertically fixedly connected to the periphery of each blanking hole 3-3, and a screen 3-10 is arranged on the vertical plate 3-11. The steel plate net is a high-strength steel plate net, and the screen is a stainless steel screen. The blanking holes 3-3 are strip holes, a high-strength steel plate net 3-9 is arranged on the empty face of the strip holes, and the periphery of the steel plate net is fixedly connected with the rotary kiln body. The outer side of the blanking hole 3-3 is provided with a vertical plate 3-11, and the vertical plate 3-11 is vertical to the outer side wall of the rotary kiln body to form a cylindrical supporting structure with the same shape as the blanking hole.
The screen 3-10 is arranged on the vertical plate 3-11, the outer edge of the screen 3-10 is fixed by a double-layer clamping plate, and the lower-layer clamping plate is connected with the upper surface of the vertical plate.
As a preferable scheme, at least two blanking holes 3-3 are uniformly distributed on the rotary kiln body in each partition space. The high-strength steel plate mesh is welded at the connecting part of the hole and the kiln body, so that the pressure of the cylindrical press roller when rolling sand-preventing resin sand can be borne, the crushed material can be ensured to fall down through meshes, the discharge port end of the blanking hole is provided with a stainless steel screen, the mesh number of the screen is the same as the mesh number required by a finished product, and sand-preventing resin sand coming out of the screen enters a collecting device, is filled into ton bags and is stacked. Sand-proof resin sand which does not accord with the mesh number falls back into the kiln body when the blanking hole rotates to a high point, and is continuously rolled by the press roller, and the process is repeated.
The rotary kiln with the functions of cooling, crushing and screening is applied to the production of sand control resin sand. The high-temperature sand-preventing resin sand from the stirrer is in a viscous state, and after entering the rotary kiln, the sand-preventing resin sand is driven by the rotary rotation to rotate along with the kiln body, when the sand-preventing resin sand rotates to a certain height, the sand-preventing resin sand falls to the bottom of the kiln body under the action of gravity due to the lower rotating speed of the rotary kiln and small centrifugal force, continuously rotates along with the kiln body, and falls after rising to a certain height, the sand-preventing resin sand continuously repeats the above actions, and the process is actually a process of cooling and scattering the high-temperature viscous resin sand edges. The sand-preventing resin sand is dispersed continuously and cooled in the rotation process of the kiln body, and spherical particles with the diameter of about 10-20mm are formed gradually. Along with the rotation of the rotary kiln, the compression roller rolls the cooled sand control resin sand, the crushed materials leak out through the steel plate mesh of the blanking hole and fall into the stainless steel screen for screening, the sand control resin sand coming out of the screen enters the collecting device, and the sand control resin sand is packed into ton bags and stacked.
The clamping plates on the screen are double-layer clamping plates, are fixedly connected through the connecting pieces, can be replaced along with the screen according to actual needs, are replaced into meshes meeting requirements for screening, and are convenient to clean and replace.
Claims (6)
1. The rotary kiln with the cooling, crushing and screening functions comprises a rotary kiln body, and is characterized in that a crushing and screening device is arranged on the rotary kiln body; the crushing and screening device is arranged at the rear section of the rotary kiln body and comprises a crushing mechanism and a screening mechanism;
the crushing mechanism comprises a compression roller and a separation plate; inside the rear section of the rotary kiln body, a plurality of partition plates are uniformly arranged along the axial direction, through holes are formed in the center and the periphery of each partition plate, and a partition space is formed by the rotary kiln body between every two adjacent partition plates; a press roller is arranged in each partition space;
the partition plate comprises a central hole and peripheral material leakage holes, and a connecting sheet between adjacent material leakage holes is fixedly connected with the inner wall of the rotary kiln body; the peripheral plate body of the central hole forms an annular baffle plate; the height of the central axis of the compression roller is lower than the inner edge of the baffle plate;
the screening mechanism comprises blanking holes, a steel plate net, a screen and a vertical plate; a plurality of blanking holes are uniformly formed in the side wall of the rear section of the rotary kiln body, a steel plate net is arranged on each blanking hole, a vertical plate is vertically fixedly connected to the periphery of each blanking hole, and a screen is arranged on the vertical plate;
the blanking holes are strip holes, high-strength steel plate meshes are arranged on the empty surfaces of the strip holes, and the peripheries of the steel plate meshes are fixedly connected with the rotary kiln body; a vertical plate is arranged at the outer side of the blanking hole and is vertical to the outer side wall of the rotary kiln body; the screen is installed on the vertical plate, the outer edge of the screen is fixed through a double-layer clamping plate, and the lower-layer clamping plate is connected with the upper surface of the vertical plate.
2. The rotary kiln with cooling and crushing and screening functions according to claim 1, characterized in that: the rotary kiln further comprises a cooling device, wherein the cooling device is arranged at the front section of the rotary kiln body and comprises a water cooling mechanism and an air cooling mechanism;
the water cooling mechanism comprises an annular supporting frame and spray nozzles, the annular supporting frame is erected above the front section of the rotary kiln body, and the spray nozzles are uniformly distributed on the inner side surface of the annular supporting frame;
the air cooling mechanism comprises a fan which is arranged outside a feeding port of the front section of the rotary kiln body.
3. The rotary kiln with cooling and crushing and screening functions according to claim 2, characterized in that: the lower part of the front section of the rotary kiln body is provided with a collecting water tank for collecting the drainage water of the water cooling mechanism and is connected with a water supply facility through a pipeline.
4. The rotary kiln with cooling and crushing and screening functions according to claim 2, characterized in that: the front section of the rotary kiln body is provided with a plurality of groups of water cooling mechanisms in parallel along the axis direction.
5. The rotary kiln with cooling and crushing and screening functions according to claim 1, characterized in that: at least two blanking holes are uniformly distributed on the rotary kiln body in each partition space.
6. Use of a rotary kiln with cooling and crushing and screening functions according to any of claims 1-5, characterized in that the rotary kiln with cooling and crushing and screening functions is used in the production of sand-control resin sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310358403.2A CN116067173B (en) | 2023-04-06 | 2023-04-06 | Rotary kiln with cooling, crushing and screening functions and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310358403.2A CN116067173B (en) | 2023-04-06 | 2023-04-06 | Rotary kiln with cooling, crushing and screening functions and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116067173A CN116067173A (en) | 2023-05-05 |
| CN116067173B true CN116067173B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310358403.2A Active CN116067173B (en) | 2023-04-06 | 2023-04-06 | Rotary kiln with cooling, crushing and screening functions and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2944996B1 (en) * | 1998-08-03 | 1999-09-06 | 株式会社 赤見製作所 | Crushing and crushing granulator |
| CN111151341A (en) * | 2020-01-11 | 2020-05-15 | 河南师范大学新联学院 | A kind of comminutor |
| CN212309762U (en) * | 2020-04-10 | 2021-01-08 | 浙江叶力机械制造有限公司 | Energy-saving ball crusher for ultra-fine crushing of hard stones |
| CN112897583A (en) * | 2021-04-27 | 2021-06-04 | 四川青源新材料有限公司 | Device and method for preparing battery-grade single-crystal manganous-manganic oxide |
| CN216115318U (en) * | 2021-11-02 | 2022-03-22 | 中铝山东工程技术有限公司 | Rotary kiln |
-
2023
- 2023-04-06 CN CN202310358403.2A patent/CN116067173B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2944996B1 (en) * | 1998-08-03 | 1999-09-06 | 株式会社 赤見製作所 | Crushing and crushing granulator |
| CN111151341A (en) * | 2020-01-11 | 2020-05-15 | 河南师范大学新联学院 | A kind of comminutor |
| CN212309762U (en) * | 2020-04-10 | 2021-01-08 | 浙江叶力机械制造有限公司 | Energy-saving ball crusher for ultra-fine crushing of hard stones |
| CN112897583A (en) * | 2021-04-27 | 2021-06-04 | 四川青源新材料有限公司 | Device and method for preparing battery-grade single-crystal manganous-manganic oxide |
| CN216115318U (en) * | 2021-11-02 | 2022-03-22 | 中铝山东工程技术有限公司 | Rotary kiln |
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| CN116067173A (en) | 2023-05-05 |
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