CN116102274A - Device and method for preparing building gypsum from phosphogypsum - Google Patents
Device and method for preparing building gypsum from phosphogypsum Download PDFInfo
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- CN116102274A CN116102274A CN202210707555.4A CN202210707555A CN116102274A CN 116102274 A CN116102274 A CN 116102274A CN 202210707555 A CN202210707555 A CN 202210707555A CN 116102274 A CN116102274 A CN 116102274A
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- China
- Prior art keywords
- material distributing
- upper shell
- phosphogypsum
- crushing
- grinding
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 65
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 35
- 239000010440 gypsum Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 15
- 239000000463 material Substances 0.000 claims abstract description 330
- 230000007246 mechanism Effects 0.000 claims abstract description 114
- 238000000227 grinding Methods 0.000 claims abstract description 105
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims abstract description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 54
- 238000001125 extrusion Methods 0.000 claims description 51
- 239000000292 calcium oxide Substances 0.000 claims description 27
- 235000012255 calcium oxide Nutrition 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 239000011295 pitch Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims 1
- 238000007790 scraping Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000003801 milling Methods 0.000 abstract description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 16
- 235000011941 Tilia x europaea Nutrition 0.000 description 16
- 239000004571 lime Substances 0.000 description 16
- 239000002245 particle Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000008187 granular material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000013011 mating Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 235000004237 Crocus Nutrition 0.000 description 1
- 241000596148 Crocus Species 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/268—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke pelletizing of the material before starting the manufacture
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a device for preparing building gypsum by phosphogypsum, which comprises an upper shell, wherein the top of the upper shell is fixedly connected with a feed hopper, two sides of the interior of the upper shell are respectively fixedly connected with a partition plate, two material distribution cavities are formed, a guide plate is fixedly arranged in each material distribution cavity, a lower shell is arranged at the bottom of the upper shell, a grinding mechanism for grinding materials entering the interior of the lower shell is arranged in the lower shell, at least one group of crushing mechanisms are arranged between the upper shell and the lower shell and are connected with the upper shell and the lower shell, the crushing mechanisms are arranged corresponding to the material distribution cavities, the material distribution mechanisms are connected with the upper part of the lower shell, and the material distribution frames are arranged at the bottom of the upper shell and are respectively connected with the guide plate in a sliding manner. According to the invention, the grinding, milling and uniformly mixing work required in the phosphogypsum preparation of the building gypsum are integrated, so that the equipment cost is reduced, the gypsum preparation efficiency is improved, the time and the labor are saved, the convenience and the rapidness are realized, and the economic benefit is good.
Description
Technical Field
The invention relates to the technical field of building gypsum production, in particular to a device and a method for preparing building gypsum from phosphogypsum.
Background
Phosphogypsum refers to solid waste residue generated when phosphorite is treated by sulfuric acid in phosphoric acid production, and the main component of phosphogypsum is calcium sulfate. Phosphogypsum main components: caSO4.2H2O, and a plurality of other impurities. The original phosphogypsum mainly exists in the form of platy crystals, has a regular and uniform shape, and is distributed and dispersed relatively; the crystal shape is mainly diamond, and there are small amount of trilateral and pentagonal shapes, etc. the main crystal phase of original phosphogypsum is calcium sulfate dihydrate, conventionally, the original phosphogypsum is generally put into a drying oven for drying at 45 ℃, the dried phosphogypsum and a proper amount of quicklime are ground in a ball mill powder, then calcined at a certain temperature, and kept warm for a proper time, and naturally cooled to room temperature, thus obtaining the building gypsum.
At present, most of equipment for preparing building gypsum by phosphogypsum is in a flow process split type, and crushing, grinding and uniformly mixing work are separated, so that on one hand, equipment cost is increased, on the other hand, the gypsum preparation efficiency is lower, and a preparation device for crushing, grinding and uniformly mixing is not provided, so that the production efficiency of preparing building gypsum by phosphogypsum is improved.
For this purpose, a device for preparing building gypsum from phosphogypsum and a method thereof are provided.
Disclosure of Invention
The invention aims to provide a device and a method for preparing building gypsum by phosphogypsum, which solve the problem that the prior art has no preparation device for crushing, grinding and uniformly mixing so as to improve the production efficiency of preparing the building gypsum by phosphogypsum.
In order to achieve the above purpose, the present invention provides the following technical solutions: an apparatus for preparing building gypsum from phosphogypsum and a method thereof, comprising;
the upper shell is fixedly connected with a feeding hopper at the top of the upper shell, partition plates are fixedly connected to two sides of the interior of the upper shell respectively, two material distribution cavities are formed, and guide plates are fixedly arranged in the material distribution cavities;
the lower shell is arranged at the bottom of the upper shell, and a grinding mechanism for grinding materials entering the lower shell is arranged in the lower shell;
at least one group of crushing mechanism arranged between the upper shell and the lower shell and connected with the upper shell and the lower shell, wherein the crushing mechanism is arranged corresponding to the material distributing cavity;
the material distributing mechanism is connected with the upper part of the lower shell and is used for discharging and distributing materials entering the upper shell;
the driving mechanism is arranged on one side of the lower shell and is in transmission connection with the crushing mechanism, the distributing mechanism and the grinding mechanism respectively;
and the material distributing frame is arranged at the bottom of the upper shell and is respectively connected with the guide plates in a sliding way.
Preferably, the driving mechanism comprises a protection frame fixedly connected with the lower shell, a worm is rotatably arranged in the protection frame, one end of the worm penetrates through the protection frame and extends to the outer side of the protection frame, the driving mechanism is fixedly connected with the output end of the driving motor, and a second bevel gear is fixedly arranged at the position of the worm corresponding to the crushing mechanism.
Preferably, the two guide plates in the material distribution cavity are obliquely arranged, the two guide plates are diagonally arranged, a feed opening communicated with the material distribution mechanism is arranged in the material distribution cavity, and a material distribution opening for distributing materials is formed in the partition plate.
Preferably, the material distributing mechanism comprises a material distributing column rotationally connected with the lower shell, the top end of the material distributing column sequentially penetrates through the material distributing frame and the lower shell and extends to the inside of the lower shell, the top of the material distributing column is fixedly connected with a stirring assembly, and the bottom of the material distributing column is fixedly connected with a first gear.
Preferably, the top of lower casing rotates installs drive assembly, drive assembly includes the second turbine of being connected with the worm meshing, second turbine top fixed connection second gear, the second gear passes through the drive chain and is connected with first gear.
Preferably, the reciprocating assembly is fixedly connected with the lower part of the material distributing frame on the material distributing column, the reciprocating assembly comprises a fixed disc, two fixed columns are symmetrically and fixedly arranged on the fixed disc, and the fixed columns are in sliding connection with the material distributing frame.
Preferably, the crushing mechanism comprises a feeding barrel fixedly connected with an upper shell and a lower shell respectively, an opening is formed in the bottom of the feeding barrel, a filter screen is fixedly installed at the opening, a driving shaft is rotatably connected to the inside of the feeding barrel, one end of the driving shaft penetrates through the feeding barrel and extends to the outer side of the feeding barrel and is fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, a spiral extrusion blade is fixedly arranged on the driving shaft, the spiral diameter of the spiral extrusion blade is decreased, and a plurality of crushing teeth are fixedly arranged inside the feeding barrel.
Preferably, the grinding mechanism comprises a grinding roller rotatably arranged in the lower shell, one side of the grinding roller is fixedly connected with a first turbine, the first turbine is in meshed connection with a worm, the bottom of the lower shell is fixedly connected with a matched grinding plate matched with the grinding roller, a certain distance is arranged between the grinding roller and the matched grinding plate, and a discharge hole is formed in the center of the matched grinding plate.
The method for preparing the building gypsum by using phosphogypsum specifically comprises the following steps:
s1, mixing: the material is put into the upper shell through the feed hopper, and the driving mechanism drives the material distributing mechanism to integrally work along with the starting of the device, so that the material distributing column can drive the stirring assembly to rotate in the upper shell, and phosphogypsum and a proper amount of quicklime entering the upper shell are stirred through the stirring assembly, so that the phosphogypsum and the quicklime are uniformly mixed;
s2, material separation: when the material distributing mechanism works, along with the continuous rotation of the material distributing column, the material distributing frame is matched with the dead weight of the material on the material distributing frame, the material distributing frame is formed to drive the material to reciprocate up and down, when the material distributing frame is used for blocking a material distributing opening, the material discharging work is not performed, when the material distributing frame is used for not blocking the material distributing opening, the material discharging work is performed, and the material in the upper shell is automatically and uniformly discharged while being stirred;
s3, crushing materials: the material enters the feeding cylinder, and the spiral diameter of the spiral extrusion blades is gradually decreased, so that when the crushing mechanism rotates, the spiral extrusion blades can perform spiral conveying on the material entering the feeding hopper, and simultaneously the spiral extrusion blades with gradually smaller screw pitches are matched to perform spiral extrusion on the material in the feeding cylinder, so that preliminary crushing on the material is formed;
s4, friction crushing: the material is driven to be extruded mutually by the spiral extrusion blades matched with the feeding cylinder, and meanwhile, when the material is extruded mutually, the material can be rubbed with a plurality of crushing teeth, and the spiral extrusion blades are driven to rotate by the feeding cylinder, so that the material is matched with the crushing teeth in the feeding cylinder to form secondary friction crushing;
s5, grinding into powder: the materials after extrusion crushing and friction crushing fall into the lower shell, the materials are guided between the grinding roller and the match grinding plate under the action of self gravity, the grinding roller rotates, relative rotation occurs between the grinding roller and the match grinding plate, and the materials between the grinding roller and the match grinding plate are ground.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, materials are put into the upper shell through the feed hopper, and the driving mechanism drives the material distributing mechanism to integrally work along with the starting of the device, so that the material distributing column can drive the stirring assembly to rotate in the upper shell, and then phosphogypsum and a proper amount of quicklime entering the upper shell are stirred through the stirring assembly, so that the phosphogypsum and the quicklime are uniformly mixed, and the materials in the upper shell can be stirred and mixed in advance, and compared with the traditional materials, the follow-up operation of independently stirring and mixing phosphogypsum and lime powder is saved, and the production efficiency is improved;
2. according to the invention, as the device is started, the material distributing mechanism works, and the material distributing frame and the self weight of the materials on the material distributing frame are matched with each other along with the continuous rotation of the material distributing column, so that the material distributing frame drives the materials to reciprocate up and down;
3. in the invention, the material separating column is synchronously started with two crushing mechanisms in the starting process of the device, and the material enters the feeding cylinder, so that the driving shaft rotates along with the material, and the spiral extrusion blades are fixedly arranged on the driving shaft, and the spiral diameters of the spiral extrusion blades are sequentially decreased, so that the spiral extrusion blades can perform spiral conveying on the material entering the feeding hopper when the crushing mechanism rotates, and the spiral extrusion blades with gradually smaller screw pitches are matched to perform spiral extrusion on the material in the feeding cylinder while performing spiral conveying on the material, so that the preliminary crushing on the material is formed;
4. because the inside of the feeding cylinder is provided with the plurality of crushing teeth, the matched screw extrusion blades of the feeding cylinder drive materials to mutually extrude, and meanwhile, the materials extruded mutually also can rub against the plurality of crushing teeth, and the feeding cylinder drives the screw extrusion blades to rotate, so that the materials are matched with the plurality of crushing teeth inside the feeding cylinder to form secondary friction crushing, and phosphogypsum is changed into small particles;
5. after the material distributing mechanism is started, the material distributing frame is matched to uniformly mix and distribute materials entering the upper shell, so that phosphogypsum and quicklime entering the upper shell are uniformly mixed, on one hand, the phosphogypsum and the quicklime are uniformly mixed, the quality of the prepared building gypsum is poor due to nonuniform mixing, on the other hand, the phosphogypsum and the quicklime are both put into the feed hopper, so that the phosphogypsum is crushed and ground later, and meanwhile, the quicklime is crushed and ground synchronously, the phenomenon that the quicklime in the initial material is granular or is agglomerated is avoided, and the uniform mixing of the phosphogypsum and the quicklime later is influenced;
6. according to the invention, as the first turbine arranged at one side of the grinding roller is in meshed connection with the worm, the worm synchronously drives the grinding roller to rotate in the lower shell, the materials subjected to extrusion crushing and friction crushing fall into the lower shell, the materials are guided between the grinding roller and the match grinding plate under the action of self gravity and then rotate, so that the relative rotation between the grinding roller and the match grinding plate occurs, the grinding effect is formed on the materials between the grinding roller and the match grinding plate, namely the grinding roller and the match grinding plate grind the materials into powder, and thus the mixed materials formed by phosphogypsum and lime powder form required building lime;
7. according to the invention, the grinding, milling and uniformly mixing work required in the phosphogypsum preparation of the building gypsum are integrated, so that the equipment cost is reduced, the gypsum preparation efficiency is improved, the time and the labor are saved, the convenience and the rapidness are realized, and the economic benefit is good.
Drawings
FIG. 1 is an overall structural view of the present invention;
FIG. 2 is a schematic overall sectional view of the present invention;
FIG. 3 is an overall front cross-sectional view of the present invention;
FIG. 4 is a schematic top view of the entire cross-sectional structure of the present invention;
FIG. 5 is a schematic structural view of a material separating frame according to the present invention;
FIG. 6 is a cross-sectional view of the connection of the crushing mechanism and the drive mechanism of the present invention;
FIG. 7 is an exploded view of the particle mechanism of the present invention;
FIG. 8 is an enlarged view of A of FIG. 2 in accordance with the present invention;
FIG. 9 is an enlarged view of B of FIG. 2 in accordance with the present invention;
fig. 10 is an enlarged view of C of fig. 3 in accordance with the present invention.
In the figure:
1. an upper housing; 11. a feed hopper; 12. a deflector; 13. a partition plate; 14. a material distributing port; 15. a feed opening;
2. a lower housing; 21. a grinding roller; 22. a first turbine; 23. a mating grinding plate; 24. a discharge port;
3. a crushing mechanism; 31. a feeding cylinder; 311. crushing teeth; 32. a drive shaft; 33. screw extruding the blade; 34. a first bevel gear;
4. a driving mechanism; 41. a worm; 42. a driving motor; 43. a second bevel gear;
5. a material distributing mechanism; 51. a material separating column; 52. a stirring assembly; 53. a first gear; 54. a reciprocating assembly; 541. a fixed plate; 542. fixing the column;
6. a material distributing frame;
7. a transmission assembly; 71. a second turbine; 72. and a second gear.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 10, the present invention provides a device for preparing building gypsum from phosphogypsum and a technical scheme of a method thereof:
the utility model provides a phosphogypsum preparation building gypsum's device, goes up casing 1, the top fixedly connected with feeder hopper 11 of going up casing 1, go up casing 1's inside both sides respectively fixedly connected with division board 13 to form two feed chambers, feed chamber inside fixed mounting has guide plate 12, lower casing 2 locates the bottom of going up casing 1, lower casing 2's inside is provided with the grinding mechanism that is used for carrying out the crocus to the material that gets into lower casing 2 inside, and at least a set of crushed aggregates mechanism 3 sets up between casing 1 and the lower casing 2 and links up with last casing 1 and lower casing 2, crushed aggregates mechanism 3 corresponds the feed chamber setting, feed mechanism 5, connect with the top of lower casing 2, feed mechanism 5 is used for carrying out unloading and feed to the material that gets into the inside of casing 1, actuating mechanism 4 installs in one side of lower casing 2, actuating mechanism 4 is respectively crushed aggregates mechanism 3, feed mechanism 5 and grinding mechanism transmission connection, feed frame 6 installs in the bottom of last casing 1, and respectively with guide plate 12 sliding connection.
According to the invention, the upper shell 1, the lower shell 2 and the crushing mechanism 3 form a whole, the feeding hopper 11 is arranged at the top of the upper shell 1, so that dry phosphogypsum and a proper amount of quicklime are input into the upper shell 1 through the feeding hopper 11, due to the arrangement of the material distributing mechanism 5, a part of the material distributing mechanism 5 is arranged in the upper shell 1, the driving mechanism 4 is arranged on one side of the whole device, and the driving mechanism 4 is in transmission connection with the lower shell 2, the crushing mechanism 3 and the material distributing mechanism 5, the device is started through the driving mechanism 4, after the material distributing mechanism 5 is started, the material entering the upper shell 1 is uniformly mixed and distributed through the material distributing frame 6, so that the phosphogypsum and the quicklime entering the upper shell 1 are uniformly mixed, on one hand, the phosphogypsum and the quicklime are prevented from being mixed uniformly, on the other hand, the phosphogypsum and the quicklime are uniformly input into the feeding hopper 11, and the phosphogypsum is crushed and the quicklime simultaneously, or the quicklime is synchronously mixed uniformly, and the raw lime is prevented from being mixed uniformly after the phosphogypsum is crushed and the raw lime is crushed, and the raw lime is uniformly.
As an embodiment of the present invention, as shown in fig. 1, 2 and 6, the driving mechanism 4 includes a protective frame fixedly connected to the lower housing 2, a worm 41 is rotatably installed inside the protective frame, one end of the worm 41 extends to the outside of the protective frame through the protective frame, and is fixedly connected to the output end of the driving motor 42, and a second bevel gear 43 is fixedly disposed on the worm 41 at a position corresponding to the crushing mechanism 3.
During operation, the worm 41 is driven to rotate by the driving motor 42 in the driving mechanism 4, the worm 41 is provided with a vortex, and meanwhile, the worm 41 is also provided with a second bevel gear 43 for carrying out linkage reaction with the material distributing mechanism 5, the material crushing mechanism 3 and the lower shell 2, namely, the driving mechanism 4 drives the device to work integrally, and the protective frame is arranged to protect the whole driving mechanism 4.
As an embodiment of the present invention, as shown in fig. 3 and fig. 4, the guide plates 12 inside the two material distribution chambers are all inclined, the two guide plates 12 are diagonally arranged, the material distribution chamber is internally provided with a discharging opening 15 communicated with the material distribution mechanism 3, and the partition plate 13 is provided with a material distribution opening 14 for distributing materials.
During operation, the phosphogypsum and a proper amount of quicklime after drying are weighed in advance, then the materials are put into the upper shell 1 through the feed hopper 11, then the materials fall on the material dividing frame 6 through self gravity, after the device is started, the material dividing frame 6 is driven to reciprocate to lift through the material dividing mechanism 5, when the material dividing frame 6 descends, the materials synchronously descend along with the material dividing frame 6 until the material dividing frame 6 descends to be arranged in a flush manner by the partition plate 13, and as the two sides of the material dividing frame 6 incline to two sides respectively, the materials can form a material guiding effect through the material dividing frame 6, and the materials can directly enter the material dividing cavity through the two material dividing openings 14.
As an embodiment of the present invention, as shown in fig. 2, 3 and 8, the material distributing mechanism 5 includes a material distributing post 51 rotatably connected to the lower housing 2, a top end of the material distributing post 51 sequentially penetrates through the material distributing frame 6 and the lower housing 2 and extends into the lower housing 2, a stirring component 52 is fixedly connected to a top of the material distributing post 51, a first gear 53 is fixedly connected to a bottom of the material distributing post 51, a transmission component 7 is rotatably installed on a top of the lower housing 2, the transmission component 7 includes a second turbine 71 engaged with the worm 41, a second gear 72 is fixedly connected to a top of the second turbine 71, and the second gear 72 is connected to the first gear 53 through a transmission chain.
In operation, as the transmission assembly 7 is arranged above the lower shell 2, the second turbine 71 in the transmission assembly 7 is in meshed connection with the worm 41 in the driving mechanism 4, and then the driving mechanism 4 drives the second turbine 71 to synchronously rotate with the worm 41 during starting, as the second gear 72 arranged above the second turbine 71 is connected with the first gear 53 at the bottom of the material distributing mechanism 5 through a transmission chain, namely, when the second turbine 71 rotates, the first gear 53 and the material distributing column 51 are synchronously driven to rotate through the transmission chain;
firstly, the stirring assembly 52 arranged at the top of the distributing column 51 is positioned in the upper shell 1, and along with the starting of the device, the driving mechanism 4 drives the distributing mechanism 5 to integrally work, so that the distributing column 51 drives the stirring assembly 52 to rotate in the upper shell 1, and then phosphogypsum and a proper amount of quicklime entering the upper shell 1 are stirred through the stirring assembly 52, so that phosphogypsum and quicklime can be uniformly mixed, and then the materials in the upper shell 1 can be stirred and mixed.
As an embodiment of the present invention, as shown in fig. 8, the reciprocating assembly 54 is fixedly connected to the material separating column 51 below the material separating frame 6, the reciprocating assembly 54 includes a fixing plate 541, two fixing columns 542 are symmetrically and fixedly arranged on the fixing plate 541, and the fixing columns 542 are slidably connected to the material separating frame 6.
In operation, since the two ends of the material dividing frame 6 are obliquely arranged, the material dividing frame 6 is in sliding connection with the partition plate 13, and the reciprocating assembly 54 is fixedly arranged on the material dividing column 51, since the fixed disc 541 in the reciprocating assembly 54 is fixedly connected with the material dividing column 51, and the two fixed columns 542 arranged on the fixed disc 541 are in sliding connection with the material dividing frame 6, when the fixed disc 541 is driven to rotate by the material dividing column 51, the fixed columns 542 on the fixed disc 541 slide along the bottom of the material dividing frame 6, when the two fixed columns 542 rotate to be transversely arranged, the fixed columns 542 are butted with the bottoms of the two sides of the material dividing frame 6 at the moment, so that the material in the material dividing frame 6 and the material feeding hopper 11 can be pushed to move upwards, namely, the whole material dividing frame 6 seals the material dividing opening 14, at the moment, the material cannot be divided, along with the rotation of the material dividing column 51, the stirring assembly 52 also rotates in the upper shell 1 to stir the material, when the fixed column 542 is longitudinally arranged, the material dividing frame 6 is pushed to move downwards along with the up of the material dividing frame 6 until the fixed column 542 is abutted with the highest part of the bottom of the material dividing frame 6, at the moment, the material dividing frame 6 does not seal the material dividing opening 14, at the moment, the material can pass through the material dividing opening 14 through two sides of the material dividing frame 6, enter the inside of the material dividing cavity, fall on the guide plate 12 in the material dividing cavity, slide along the guide plate 12 through self gravity after the material guide plate 12 until entering the inside of the material dividing mechanism 3 through the material discharging opening 15;
along with the continuous rotation of the material distributing post 51, the material distributing frame 6 is matched and the dead weight of the materials on the material distributing frame 6 is matched, the material distributing frame 6 drives the materials to reciprocate up and down, when the material distributing frame 6 plugs the material distributing opening 14, no blanking work is performed, when the material distributing frame 6 does not plug the material distributing opening 14, the blanking work is performed, and as the rotation speed of the material distributing post 51 is fixed, the materials in the upper shell 1 are automatically and uniformly blanked while being stirred, so that the materials can be prevented from being blocked in the upper shell 1.
As an embodiment of the present invention, as shown in fig. 6 and 7, the crushing mechanism 3 includes a feeding cylinder 31 fixedly connected to the upper casing 1 and the lower casing 2, an opening is provided at the bottom of the feeding cylinder 31, a filter screen is fixedly installed at the opening, a driving shaft 32 is rotatably connected to the inside of the feeding cylinder 31, one end of the driving shaft 32 extends through the feeding cylinder 31 to the outside of the feeding cylinder 31 and is fixedly connected to a first bevel gear 34, the first bevel gear 34 is meshed with a second bevel gear 43, a screw extrusion blade 33 is fixedly provided on the driving shaft 32, the screw diameter of the screw extrusion blade 33 decreases, and a plurality of crushing teeth 311 are fixedly provided in the inside of the feeding cylinder 31.
When the material in the material distribution cavity enters the crushing mechanism 3 through the blanking port 15, as the first bevel gear 34 is fixedly arranged at one end of the driving shaft 32 in the crushing mechanism 3, namely when the material distribution mechanism 5 is started, the material distribution column 51 is also synchronously started with the two crushing mechanisms 3, the driving shaft 32 rotates along with the material entering the inside of the feeding cylinder 31, the spiral extrusion blades 33 are fixedly arranged on the driving shaft 32, and the spiral diameters of the spiral extrusion blades 33 are sequentially decreased, further, the effect that the spiral extrusion blades 33 can carry out spiral conveying on the material entering the inside of the feeding hopper 11 is formed when the crushing mechanism 3 rotates, the spiral extrusion blades 33 with gradually reduced screw pitches are matched when the material is carried out spiral conveying, the effect of spiral extrusion on the material inside the feeding cylinder 31 is formed, the primary crushing of the material is formed, the matched spiral extrusion blades 33 of the feeding cylinder 31 drive the material to be mutually extruded, and simultaneously the material which is mutually extruded can also be mutually rubbed with the plurality of crushing teeth 311 arranged inside the feeding cylinder 31, and further the spiral extrusion blades 31 are driven by the feeding cylinder 31 to drive the spiral extrusion blades to rotate, so that the crushed materials are secondarily to form small particles, and the crushed gypsum particles are formed inside the feeding cylinder 31;
in actual use, owing to be provided with two feed cavities, and then the inside of two crushed aggregates mechanisms 3 is got into respectively to the material in two feed cavities, owing to be provided with opening and filter screen in the bottom of feed cylinder 31, the filter screen should adopt the higher material of hardness, and then carry out and extrude broken and secondary friction is broken to phosphogypsum and lime powder along with crushed aggregates mechanism 3 are whole, become the material granule, the granular material of granule is the filter diameter of conforming to the filter screen, the granular material of granule gets into the inside of casing 2 under through passing the filter screen, if the particle diameter of material does not conform to the filter screen, then can continue to extrude broken and friction broken in the inside of crushed aggregates mechanism 3, until the particle diameter accords with the filter diameter of filter screen, enter into the inside of casing 2 at last.
As an embodiment of the present invention, as shown in fig. 2 and 3, the grinding mechanism includes a grinding roller 21 rotatably mounted in the lower housing 2, a first turbine 22 is fixedly connected to one side of the grinding roller 21, the first turbine 22 is engaged with a worm 41, a mating grinding plate 23 adapted to the grinding roller 21 is fixedly connected to the bottom of the lower housing 2, a certain distance is provided between the grinding roller 21 and the mating grinding plate 23, and a discharge port 24 is provided in the center of the mating grinding plate 23.
During operation, the grinding roller 21 in the grinding mechanism is rotatably installed, the matched grinding plate 23 is detachably installed at the bottom of the lower shell 2, in actual use, a certain interval is arranged between the matched grinding plate 23 and the grinding roller 21, and the interval can be adjusted according to actual grinding precision, namely, if the size of required material particles is smaller, namely, the matched grinding plate 23 with smaller surface interval of the grinding roller 21 is replaced, in the process of starting the device, the first turbine 22 arranged at one side of the grinding roller 21 is meshed and connected with the worm 41, the worm 41 synchronously drives the grinding roller 21 to rotate in the lower shell 2, materials after extrusion crushing and friction crushing fall into the lower shell 2, the materials are guided between the grinding roller 21 and the matched grinding plate 23 under the action of self gravity, and then the grinding roller 21 rotates, so that the grinding roller 21 and the matched grinding plate 23 rotate relatively, namely, the materials between the grinding roller 21 and the matched grinding plate 23 are ground, namely, the materials are ground through the grinding roller 21 and the matched grinding plate 23, finally, the building lime is calcined, the building lime is cooled, and the building lime is cooled down to a proper temperature, and the building lime is cooled down to a proper temperature.
Working principle: during operation, the dried phosphogypsum and a proper amount of quicklime are weighed in advance, then the materials are put into the upper shell 1 through the feed hopper 11, then the materials fall on the material distributing frame 6 through self gravity, and at the moment, the whole device is started, and the worm 41 is driven to rotate through the driving motor 42 in the driving mechanism 4;
because the transmission assembly 7 is arranged above the lower shell 2, the second turbine 71 in the transmission assembly 7 is meshed with the worm 41 in the driving mechanism 4, and then the driving mechanism 4 drives the second turbine 71 to synchronously rotate with the worm 41 during starting, because the second gear 72 arranged above the second turbine 71 is connected with the first gear 53 at the bottom of the material distributing mechanism 5 through a transmission chain, namely, when the second turbine 71 rotates, the first gear 53 and the material distributing column 51 are synchronously driven by the transmission chain to rotate, the stirring assembly 52 rotates in the upper shell 1, and phosphogypsum and a proper amount of quicklime entering the upper shell 1 are stirred by the stirring assembly 52, so that the phosphogypsum and the quicklime can be uniformly mixed, and materials formed in the upper shell 1 can be stirred and mixed;
since the two ends of the material dividing frame 6 are obliquely arranged, the material dividing frame 6 is in sliding connection with the partition plate 13, and the reciprocating assembly 54 is fixedly arranged on the material dividing column 51, and since the fixed disc 541 in the reciprocating assembly 54 is fixedly connected with the material dividing column 51, and the two fixed columns 542 arranged on the fixed disc 541 are in sliding connection with the material dividing frame 6, when the fixed disc 541 is driven to rotate by the material dividing column 51, the fixed columns 542 on the fixed disc 541 can slide along the bottom of the material dividing frame 6, when the two fixed columns 542 rotate to be transversely arranged, the fixed columns 542 are butted with the bottoms of the two sides of the material dividing frame 6 at the moment, so that the material in the material dividing frame 6 and the material feeding hopper 11 can be pushed to move upwards, namely, the whole material dividing frame 6 seals the material dividing opening 14, at the moment, the material cannot be divided, along with the rotation of the material dividing column 51, the stirring assembly 52 also rotates in the upper shell 1 to stir the material, when the fixed column 542 is longitudinally arranged, the material dividing frame 6 is pushed to move downwards along with the up of the material dividing frame 6 until the fixed column 542 is abutted with the highest part of the bottom of the material dividing frame 6, at the moment, the material dividing frame 6 does not seal the material dividing opening 14, at the moment, the material can pass through the material dividing opening 14 through two sides of the material dividing frame 6, enter the inside of the material dividing cavity, fall on the guide plate 12 in the material dividing cavity, slide along the guide plate 12 through self gravity after the material guide plate 12 until entering the inside of the material dividing mechanism 3 through the material discharging opening 15;
because the first bevel gear 34 is fixedly arranged at one end of the driving shaft 32 in the crushing mechanism 3, namely when the material distributing mechanism 5 is started, the material distributing column 51 is also synchronous to start the two crushing mechanisms 3, the materials enter the feeding barrel 31, and the driving shaft 32 rotates, the spiral extrusion blades 33 are fixedly arranged on the driving shaft 32, and the spiral diameters of the spiral extrusion blades 33 are sequentially decreased, the effect that the spiral extrusion blades 33 can carry out spiral conveying on the materials entering the feeding hopper 11 when the crushing mechanism 3 rotates is further formed, the spiral extrusion blades 33 with gradually smaller screw pitches are matched when the materials are conveyed in a spiral manner, the effect of spiral extrusion on the materials inside the feeding barrel 31 is formed, the primary crushing of the materials is formed, the spiral extrusion blades 33 matched with the feeding barrel 31 drive the materials to mutually extrude, and the materials simultaneously extrude mutually, and the spiral extrusion blades 33 are also driven by the feeding barrel 31 to rotate, so that the materials are matched with the crushing teeth 311 inside the feeding barrel 31 to form secondary friction, and the secondary friction is formed, and the secondary friction is reduced to form the granulated gypsum;
the materials after extrusion crushing and friction crushing fall into the lower shell 2, the materials are guided between the grinding roller 21 and the match grinding plate 23 under the action of self gravity, the grinding roller 21 rotates, relative rotation occurs between the grinding roller 21 and the match grinding plate 23, the materials between the grinding roller 21 and the match grinding plate 23 are ground, namely, the materials are ground through the grinding roller 21 and the match grinding plate 23, so that the mixed materials formed by phosphogypsum and lime powder finally form required building lime, the subsequent building lime falls down through the discharge hole 24, the building lime in the carrier is collected through the carrier, the building lime in the carrier is calcined at a certain temperature and is kept warm for a proper time, and the building gypsum is formed by natural cooling to room temperature.
A method for preparing building gypsum from phosphogypsum comprises the following steps: the method specifically comprises the following steps:
s1, mixing: the materials are put into the upper shell 1 through the feed hopper 11, and the driving mechanism 4 drives the material distributing mechanism 5 to integrally work along with the starting of the device, so that the material distributing column 51 can drive the stirring assembly 52 to rotate in the upper shell 1, and phosphogypsum and a proper amount of quicklime entering the upper shell 1 are stirred through the stirring assembly 52, so that the phosphogypsum and the quicklime are uniformly mixed;
s2, material separation: when the material distributing mechanism 5 works, along with the continuous rotation of the material distributing column 51, the material distributing frame 6 is matched with the dead weight of the material on the material distributing frame 6, so that the material distributing frame 6 drives the material to reciprocate up and down, when the material distributing frame 6 blocks the material distributing opening 14, the material discharging work is not performed, and when the material distributing frame 6 does not block the material distributing opening 14, the material discharging work is performed, so that the material in the upper shell 1 is automatically and uniformly discharged while being stirred;
s3, crushing materials: the material enters the feeding barrel 31, and the spiral diameters of the spiral extrusion blades 33 are gradually decreased, so that when the crushing mechanism 3 rotates, the spiral extrusion blades 33 can perform spiral conveying on the material entering the feeding hopper 11, and simultaneously the spiral extrusion blades 33 with gradually smaller screw pitches are matched to perform spiral extrusion on the material in the feeding barrel 31, so that preliminary crushing on the material is formed;
s4, friction crushing: the material is driven to be extruded mutually by the matched screw extrusion blades 33 of the feeding barrel 31, and meanwhile, when the material is extruded mutually, the material is rubbed with the crushing teeth 311, the feeding barrel 31 drives the screw extrusion blades 33 to rotate, so that the material is matched with the crushing teeth 311 in the feeding barrel 31 to form secondary friction crushing;
s5, grinding into powder: the crushed and friction-crushed materials fall into the lower shell 2, the materials are guided between the grinding roller 21 and the match grinding plate 23 under the action of self gravity, the grinding roller 21 rotates, relative rotation occurs between the grinding roller 21 and the match grinding plate 23, and grinding is performed on the materials between the grinding roller 21 and the match grinding plate 23.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An apparatus for preparing building gypsum from phosphogypsum, comprising;
the feeding device comprises an upper shell (1), wherein the top of the upper shell (1) is fixedly connected with a feeding hopper (11), two sides of the interior of the upper shell (1) are respectively fixedly connected with a partition plate (13) and form two material distribution cavities, and a guide plate (12) is fixedly arranged in each material distribution cavity;
the lower shell (2) is arranged at the bottom of the upper shell (1), and a grinding mechanism for grinding materials entering the lower shell (2) is arranged in the lower shell (2);
at least one group of crushing mechanism (3) arranged between the upper shell (1) and the lower shell (2) and connected with the upper shell (1) and the lower shell (2), wherein the crushing mechanism (3) is arranged corresponding to the material distributing cavity;
the material distributing mechanism (5) is connected with the upper part of the lower shell (2), and the material distributing mechanism (5) is used for discharging and distributing materials entering the upper shell (1);
the driving mechanism (4) is arranged on one side of the lower shell (2), and the driving mechanism (4) is respectively connected with the crushing mechanism (3), the distributing mechanism (5) and the grinding mechanism in a transmission way;
the material distributing frame (6) is arranged at the bottom of the upper shell (1) and is respectively connected with the guide plates (12) in a sliding way.
2. The apparatus for preparing building gypsum from phosphogypsum according to claim 1, wherein: the driving mechanism (4) comprises a protection frame fixedly connected with the lower shell (2), a worm (41) is rotatably installed inside the protection frame, one end of the worm (41) penetrates through the protection frame and extends to the outer side of the protection frame, the worm is fixedly connected with the output end of the driving motor (42), and a second bevel gear (43) is fixedly arranged at the position, corresponding to the crushing mechanism (3), on the worm (41).
3. The apparatus for preparing building gypsum from phosphogypsum according to claim 1, wherein: two guide plates (12) in the material distribution cavities are obliquely arranged, two guide plates (12) are diagonally arranged, a feed opening (15) communicated with the material distribution mechanism (3) is arranged in the material distribution cavities, and a material distribution opening (14) for distributing materials is formed in the separation plate (13).
4. The apparatus for preparing building gypsum from phosphogypsum according to claim 1, wherein: the material distributing mechanism (5) comprises a material distributing column (51) rotationally connected with the lower shell (2), the top end of the material distributing column (51) sequentially penetrates through the material distributing frame (6) and the lower shell (2) and extends to the inside of the lower shell (2), the top of the material distributing column (51) is fixedly connected with a stirring assembly (52), and the bottom of the material distributing column (51) is fixedly connected with a first gear (53).
5. The apparatus for preparing building gypsum from phosphogypsum according to claim 1, wherein: the top of lower casing (2) rotates and installs drive assembly (7), drive assembly (7) are including second turbine (71) with worm (41) meshing connection, second turbine (71) top fixed connection second gear (72), second gear (72) are connected with first gear (53) through the drive chain.
6. An apparatus for preparing building gypsum from phosphogypsum as set forth in claim 4, wherein: the reciprocating assembly (54) is fixedly connected to the lower portion of the material distributing frame (6) on the material distributing column (51), the reciprocating assembly (54) comprises a fixed disc (541), two fixed columns (542) are symmetrically and fixedly arranged on the fixed disc (541), and the fixed columns (542) are in sliding connection with the material distributing frame (6).
7. The apparatus for preparing building gypsum from phosphogypsum according to claim 1, wherein: the crushing mechanism comprises a feeding barrel (31) fixedly connected with an upper shell (1) and a lower shell (2) respectively, an opening is formed in the bottom of the feeding barrel (31), a filter screen is fixedly mounted at the opening, a driving shaft (32) is rotatably connected to the inside of the feeding barrel (31), one end of the driving shaft (32) penetrates through the feeding barrel (31) and extends to the outer side of the feeding barrel (31) and is fixedly connected with a first bevel gear (34), the first bevel gear (34) is meshed with a second bevel gear (43) and connected, a spiral extrusion blade (33) is fixedly arranged on the driving shaft (32), the spiral diameter of the spiral extrusion blade (33) is reduced, and a plurality of crushing teeth (311) are fixedly arranged in the feeding barrel (31).
8. The apparatus for preparing building gypsum from phosphogypsum according to claim 1, wherein: grinding mechanism is including rotating the grinding roller (21) of installing in lower casing (2), one side fixedly connected with first turbine (22) of grinding roller (21), and first turbine (22) and worm (41) meshing are connected, the bottom fixedly connected with of lower casing (2) is with the match grinding plate (23) of grinding roller (21) looks adaptation, and is provided with certain interval between grinding roller (21) and match grinding plate (23), match grinding plate (23) central authorities department has seted up discharge gate (24).
9. A method for preparing building gypsum by phosphogypsum, which is applied to the device for preparing building gypsum by phosphogypsum as set forth in any one of claims 1 to 8, and is characterized in that: the method specifically comprises the following steps:
s1, mixing: the material is put into the upper shell (1) through the feed hopper (11), and the driving mechanism (4) drives the distributing mechanism (5) to integrally work along with the starting of the device, so that the distributing column (51) can drive the stirring assembly (52) to rotate in the upper shell (1), and phosphogypsum and a proper amount of quicklime entering the upper shell (1) are stirred through the stirring assembly (52), so that the phosphogypsum and the quicklime are uniformly mixed;
s2, material separation: when the material distributing mechanism (5) works, the material distributing frame (6) is matched with the material distributing column (51) to continuously rotate, and the material distributing frame (6) and the self weight of the material on the material distributing frame (6) are matched, so that the material distributing frame (6) drives the material to reciprocate up and down, when the material distributing frame (6) seals the material distributing opening (14), the material discharging work is not performed, when the material distributing frame (6) does not seal the material distributing opening (14), the material discharging work is performed, and the material in the upper shell (1) is formed to be stirred while being automatically and uniformly discharged;
s3, crushing materials: the material enters the feeding barrel (31), and the spiral diameter of the spiral extrusion blades (33) is gradually decreased, so that when the crushing mechanism (3) rotates, the spiral extrusion blades (33) can perform spiral conveying on the material entering the feeding hopper (11), and meanwhile, the spiral extrusion blades (33) with gradually decreased screw pitches are matched to perform spiral extrusion on the material in the feeding barrel (31) so as to form preliminary crushing on the material;
s4, friction crushing: the material is driven to be extruded mutually by the matched screw extrusion blades (33) of the feeding cylinder (31), and meanwhile, when the material is extruded mutually, the material can generate scraping friction with the crushing teeth (311), the feeding cylinder (31) drives the screw extrusion blades (33) to rotate, so that the material is matched with the crushing teeth (311) in the feeding cylinder (31) to form secondary friction crushing;
s5, grinding into powder: the materials subjected to extrusion crushing and friction crushing fall into the lower shell (2), the materials are guided between the grinding roller (21) and the match grinding plate (23) under the action of self gravity, the grinding roller (21) rotates, relative rotation occurs between the grinding roller (21) and the match grinding plate (23), and the materials between the grinding roller (21) and the match grinding plate (23) are ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210707555.4A CN116102274A (en) | 2022-06-21 | 2022-06-21 | Device and method for preparing building gypsum from phosphogypsum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210707555.4A CN116102274A (en) | 2022-06-21 | 2022-06-21 | Device and method for preparing building gypsum from phosphogypsum |
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| CN116102274A true CN116102274A (en) | 2023-05-12 |
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| CN202210707555.4A Pending CN116102274A (en) | 2022-06-21 | 2022-06-21 | Device and method for preparing building gypsum from phosphogypsum |
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| CN (1) | CN116102274A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112473821A (en) * | 2020-10-21 | 2021-03-12 | 安徽金太阳生化药业有限公司 | Universal pulverizer |
| CN216440757U (en) * | 2021-12-23 | 2022-05-06 | 福建泉州味中皇食品有限公司 | Grinding machine convenient to adjust grinding particle size |
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2022
- 2022-06-21 CN CN202210707555.4A patent/CN116102274A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112473821A (en) * | 2020-10-21 | 2021-03-12 | 安徽金太阳生化药业有限公司 | Universal pulverizer |
| CN216440757U (en) * | 2021-12-23 | 2022-05-06 | 福建泉州味中皇食品有限公司 | Grinding machine convenient to adjust grinding particle size |
Non-Patent Citations (1)
| Title |
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| 林宗寿编著: "《水泥品种、工艺设计及原燃料（第1卷）》", 31 August 2021, 武汉理工大学出版社, pages: 457 * |
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