CN214991185U - System for utilize micrite magnesite preparation high iodine value of inhaling magnesium oxide - Google Patents
System for utilize micrite magnesite preparation high iodine value of inhaling magnesium oxide Download PDFInfo
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- CN214991185U CN214991185U CN202120891755.0U CN202120891755U CN214991185U CN 214991185 U CN214991185 U CN 214991185U CN 202120891755 U CN202120891755 U CN 202120891755U CN 214991185 U CN214991185 U CN 214991185U
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Abstract
The utility model discloses a system for preparing magnesium oxide with high iodine absorption value by utilizing microcrystalline magnesite, which comprises a crusher, a concentrating machine, a first grinding machine, a kiln and a second grinding machine; the discharge end of the crusher is communicated with the feeding end of the concentrating machine; the discharge end of the concentrating machine is communicated with the feeding end of the first grinding machine; the discharge end of the first grinding machine is communicated with the feed end of the kiln; and the discharge end of the kiln is communicated with the feeding end of the second grinding machine. The breaker plays in this system and carries out the effect of primary crushing to the raw materials, and the raw materials after the breakage can be in under the work of first machine of grinding, the rapid grinding is to prepare required granularity within range, the kiln is to the process the raw materials after first machine of grinding are calcined to grind the raw materials of calcining, obtain the high iodine value magnesium oxide that inhales.
Description
Technical Field
The utility model relates to a mineral processing technology field. In particular to a system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite.
Background
The magnesium oxide with high iodine absorption value is one of important basic raw materials for producing various high-tech fine products, and has important application in the fields of electronics, high polymers, rubber, catalysis, harmful gas adsorption, heavy metal element adsorption and the like, so the magnesium oxide is widely applied as a novel material.
At present, the production of magnesium oxide with high iodine absorption value mostly adopts the following two processes: liquid magnesium salt synthesis and dolomite carbonization. The liquid magnesium salt synthesizing process with bittern or sea water as material includes ammonia carbonate process, carbonating process, bittern ammonia gas precipitation process, etc. The dolomite carbonizing process for producing magnesia with high iodine value includes the technological processes of calcining, carbonizing, purifying, re-calcining, etc. The liquid magnesium salt synthesizing process can prepare magnesium oxide with excellent quality and high iodine absorption value, but has long production process, limited material producing area, high power consumption and high production cost. The dolomite carbonization method can also prepare the magnesia with excellent quality and high iodine absorption value, but the energy consumption of the production process is extremely high, the separation of magnesium and calcium in the process is difficult, and the purity of the obtained product is not high.
The magnesite resources of China are rich, and the microcrystalline magnesite distributed in the Sichuan-Tibet area has large reserves, high purity and easy exploitation. The microcrystalline magnesite is used as a raw material, and a one-step calcination method is adopted to prepare the magnesium oxide with high iodine absorption value, so that the production process is simple, the magnesium oxide with high iodine absorption value and high purity can be obtained, and the production cost is greatly reduced; on the other hand, the utilization rate and the added value of magnesite in China are greatly improved, and the application field of the magnesite is expanded. The crusher of the preparation system in the prior art has poor crushing effect on microcrystalline magnesite, and the obtained microcrystalline magnesite has larger particle size difference, thereby influencing subsequent preparation procedures.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims to solve the technical problem that a system for utilize micrite magnesite preparation high iodine value magnesium oxide that is more unified to micrite magnesite crushing effect good, gained micrite magnesite granule is provided.
In order to solve the technical problem, the utility model provides a following technical scheme:
a system for preparing magnesium oxide with high iodine absorption value by utilizing microcrystalline magnesite comprises a crusher, a concentrating machine, a first grinding machine, a kiln and a second grinding machine;
the discharge end of the crusher is communicated with the feeding end of the concentrating machine; the discharge end of the concentrating machine is communicated with the feeding end of the first grinding machine; the discharge end of the first grinding machine is communicated with the feed end of the kiln; and the discharge end of the kiln is communicated with the feeding end of the second grinding machine. The breaker plays in this system and carries out the effect of primary crushing to the raw materials, and the raw materials after the breakage can be in under the work of first machine of grinding, the rapid grinding is to prepare required granularity within range, the kiln is to the process the raw materials after first machine of grinding are calcined to grind the raw materials of calcining, obtain the high iodine value magnesium oxide that inhales.
In the system for preparing the magnesium oxide with the high iodine absorption value by using the microcrystalline magnesite, the adopted technology of the concentrating machine is a visual identification technology; the first grinding machine is an ultra-fine mill, a vertical mill, a Raymond mill, a ring ball mill, a double-roll crusher, a jaw crusher or a hammer crusher; the kiln is a tunnel kiln, an electric push plate kiln, a rotary kiln, a suspension furnace or a multilayer furnace.
The system for preparing the magnesium oxide with the high iodine value by using the microcrystalline magnesite comprises a box body, a first crushing assembly, a feeding hopper, a second crushing assembly, a guide assembly, a screen, a vibrator and a second discharging pipe, wherein the first crushing assembly is arranged on the box body;
the first crushing assembly is positioned at the top of the box body, the bottom end of the feeding hopper penetrates through the middle of the top wall of the box body, and the box body is communicated with the external environment through the feeding hopper; the second crushing assembly is positioned at one side of the middle part in the box body, which is close to the bottom, and the second crushing assembly is positioned under the first crushing assembly; the screen is fixedly connected to the inner side wall of the bottom of the box body, the vibrator is mounted in the middle of the lower surface of the screen, the guide assembly is located on the side of the second crushing assembly, and the guide assembly is communicated with the box body; the second discharging pipe penetrates through the middle part of the bottom wall of the box body, the box body is communicated with the outside through the second discharging pipe, and a second electromagnetic valve is mounted on the second discharging pipe;
a material guide plate is welded on the inner side wall of the box body, a first material discharge pipe penetrates through the center of the material guide plate, and a first electromagnetic valve is mounted on the first material discharge pipe; two or more bases are welded on the outer bottom wall of the box body;
the first crushing assembly comprises a supporting table, a first motor, a driving wheel, a driven wheel, a transmission belt and a crushing roller, the supporting table is welded on the outer side wall of the box body, the first motor is installed on the supporting table, the driving wheel is installed on an output shaft of the first motor, the output shaft of the first motor is connected with a first rotating shaft in a driving mode, a first end of the first rotating shaft penetrates through a bearing on the side wall of the box body, and a second end of the first rotating shaft penetrates through a bearing on the inner side wall of the box body; the driving wheel and the driven wheel are in transmission connection through the transmission belt, a second rotating shaft penetrates through the center of the driven wheel, a first end of the second rotating shaft penetrates through a bearing on the side wall of the box body, and a second end of the second rotating shaft penetrates through a bearing on the inner side wall of the box body; the number of the crushing rollers is two, and the two crushing rollers are sleeved on the surfaces of the first rotating shaft and the second rotating shaft respectively;
the second crushing assembly comprises an arc-shaped supporting block, a grinding groove, a grinding wheel, a telescopic rod, a first connecting rod, a second connecting rod and an electric push rod, the arc-shaped supporting block is welded on the inner side wall of the box body, the grinding groove is positioned above the arc-shaped supporting block, the grinding wheel is positioned in the grinding groove, and the grinding wheel is driven by external driving equipment; a first fixed block is welded on the inner side wall of the box body, the first fixed block is hinged to the first end of the telescopic rod through a pin shaft, a second end of the telescopic rod is hinged to a second fixed block through a pin shaft, the second fixed block is fixedly connected to the outer wall of the grinding groove, a third fixed block is fixedly connected to the airing net, the third fixed block is hinged to the first end of the first connecting rod through a pin shaft, the second end of the first connecting rod is fixedly connected to the first end of the electric push rod, the second end of the electric push rod is fixedly connected to the first end of the second connecting rod, the second end of the second connecting rod is hinged to a fourth fixed block through a pin shaft, and the fourth fixed block is fixedly connected to the bottom wall outside the grinding groove;
the guide component comprises a transmission case, a second motor, a clapboard, a third rotating shaft, a transmission paddle, a feeding pipe and a material guide pipe, the outer side wall of the transmission case is fixedly connected with the outer side wall of the case body, the second motor is arranged on the inner bottom wall of the transmission case, the baffle plate is fixedly connected on the inner side wall of the bottom of the transmission case, the output shaft of the second motor penetrates through the baffle plate and is in driving connection with the third rotating shaft, the driving paddle is arranged on the third rotating shaft, the feeding pipe is simultaneously arranged on the side walls of the box body and the driving box in a penetrating way, the bottom of the box body is communicated with the bottom of the transmission box through the feeding pipe, the first end of the material guide pipe is arranged on the side wall of the top of the transmission box in a penetrating way, and the material guide pipe penetrates through the box body and is convexly arranged in the box body, and the second end of the material guide pipe faces the grinding groove. When the staff uses the breaker is right when the micrite magnesite carries out the breakage, the micrite magnesite passes through go into the hopper and enters into in the box, process after first broken subassembly is broken the micrite magnesite drops on the stock guide, open first solenoid valve, the micrite magnesite passes through first discharging pipe drops on the broken subassembly of second, and process after the broken back of second, drop on the screen cloth, accord with the screen cloth specification the micrite magnesite passes through the screen cloth drops on the bottom wall in the box, do not accord with the screen cloth specification the micrite magnesite passes through the direction subassembly quilt the broken subassembly of second grinds once more, until the micrite magnesite all accords with the specification, makes the broken granularity of micrite magnesite is more unified.
The specific method for producing the magnesium oxide with the high iodine absorption value by using the system for preparing the magnesium oxide with the high iodine absorption value by using the microcrystalline magnesite comprises the following steps:
step A: crushing: taking microcrystalline magnesite as a raw material, and crushing the microcrystalline magnesite to a certain granularity by using the crusher;
and B: mineral separation: d, performing fine beneficiation on the microcrystalline magnesite with a certain granularity in the step A by using the concentrator and utilizing a visual identification technology to enable the microcrystalline magnesite to reach a certain purity;
and C: secondary processing: b, secondarily processing the microcrystalline magnesite refined by the visual recognition technology in the step B to a certain granularity by using the first grinding machine;
step D: and (3) calcining: calcining the microcrystalline magnesite subjected to secondary processing in the step C in the kiln;
step E: grinding: and D, grinding the calcined microcrystalline magnesite in the step D by using the second grinding machine to obtain the magnesium oxide with high iodine absorption value.
In the step A, the crushing granularity of the microcrystalline magnesite is 20-200 mm;
in the step B, the visual identification technology is adopted for the microcrystalline magnesite to enable the MgO content of the microcrystalline magnesite ore to reach more than 47.3%;
in the step C, the secondary processing granularity of the microcrystalline magnesite is 1 mu m-20 mm; the secondary processing equipment for the microcrystalline magnesite comprises an ultrafine mill, a vertical mill, a Raymond mill, a ring ball mill, a double-roll crusher, a jaw crusher, a hammer crusher and the like;
in step D, the calcination temperature of the kiln is: the calcining time is as follows at 600-1200 deg.C: 0.5h-5 h; the kiln is a tunnel kiln, an electric push plate kiln, a rotary kiln, a suspension furnace, a multilayer furnace and the like;
in step E, the calcined microcrystalline magnesite has a grinding particle size of < 0.15 mm;
the content w (MgO) of magnesium oxide in the magnesium oxide with high iodine absorption value is more than or equal to 98 percent, and the iodine absorption value is more than or equal to 150mgI2/gMgO。
SiO in the microcrystalline magnesite2Containing 0.06 wt% of Al2O3Containing 0.02 wt% of Fe2O3Containing 0.04 wt% of TiO20.02 wt%, CaO 0.57 wt%, and MgO 47.20 wt%; the scorching of the microcrystalline magnesite is as follows: 51.76 wt%.
The technical scheme of the utility model following profitable technological effect has been obtained:
1. in the utility model, when the worker uses the crusher to crush the microcrystal magnesite, the microcrystalline magnesite enters the box body through the feeding hopper, the microcrystalline magnesite crushed by the first crushing assembly falls on the material guide plate, the first electromagnetic valve is opened, the microcrystalline magnesite falls on the second crushing assembly through the first discharging pipe, and the microcrystalline magnesite which meets the specification of the screen mesh falls on the bottom wall in the box body through the screen mesh, the microcrystalline magnesite which does not meet the specification of the screen mesh passes through the guide assembly and is ground again by the second crushing assembly until the microcrystalline magnesite completely meets the specification, so that the crushing granularity of the microcrystalline magnesite is more uniform.
2. Fig. 2 is an XRD diagram of the magnesium oxide product with high iodine absorption value prepared by the utility model, and the obtained product is magnesium oxide without impurity peak, which shows that the purity of magnesium oxide is higher.
3. Unlike the previous method of producing magnesia with high iodine value by using bittern or sea water as material and through liquid magnesium salt synthesis process and solid dolomite as material and through dolomite carbonization process, the solid microcrystal magnesite as material is first calcined to produce magnesia with high iodine value. The magnesium oxide with high iodine absorption value prepared by the utility model has simple production process, easy process control and low cost; the prepared magnesium oxide has high purity, the MgO content is more than or equal to 98 percent, and the iodine absorption value is more than or equal to 150mgI 2/gMgO; meanwhile, the utilization rate and the added value of the magnesite are improved, and the application field of the magnesite is expanded.
Drawings
FIG. 1 is a system diagram of a system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite;
FIG. 2 is an XRD pattern of the product of a system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite;
FIG. 3 is a schematic diagram of a formal cross-sectional structure of a crusher in a system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite;
FIG. 4 is a schematic side view of a sectional structure of a grinding groove of the crusher of the present invention;
FIG. 5 is a schematic top view of a first crushing assembly of the crusher of the present invention;
figure 6 is a process flow diagram of a system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite.
The reference numbers in the figures denote: 1-a box body; 2-a first crushing assembly; 201-a support table; 202-a first electric machine; 203-driving wheel; 204-a transmission belt; 205-driven wheel; 206-a first shaft; 207-a crushing roller; 208-a second shaft; 3-feeding into a hopper; 4-a second crushing assembly; 401-arc support block; 402-grinding groove; 403-grinding wheel; 404-first fixed block; 405-a telescoping rod; 406-a second fixed block; 407-a third fixed block; 408-a first connecting rod; 409-an electric push rod; 410-a second connecting rod; 411-a fourth fixed block; 5-a guide assembly; 501-a transmission case; 502-a second electric machine; 503-a partition; 504-a third shaft; 505-a propeller; 506-a feeding pipe; 507-a material guide pipe; 6-a material guide plate; 7-a first discharge pipe; 8-a first solenoid valve; 9-a screen mesh; 10-a vibrator; 11-a second discharge pipe; 12-a second solenoid valve; 13-a base; 14-a concentrator; 15-a first grinder; 16-a kiln; 17-a second grinder; 18-crusher.
Detailed Description
Example 1
As shown in fig. 3 and 6, the system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite according to the embodiment comprises a crusher 18, a concentrator 14, a first grinder 15, a kiln 16 and a second grinder 17;
the discharge end of the crusher 18 is in communication with the feed end of the concentrator 14; the discharge end of the concentrator 14 communicates with the feed end of the first mill 15; the discharge end of the first grinding machine 15 is communicated with the feed end of the kiln 16; the discharge end of the kiln 16 is communicated with the feed end of the second grinding mill 17. The breaker plays in this system and carries out the effect of primary crushing to the raw materials, and the raw materials after the breakage can be in under the work of first machine of grinding, the rapid grinding is to prepare required granularity within range, the kiln is to the process the raw materials after first machine of grinding are calcined to grind the raw materials of calcining, obtain the high iodine value magnesium oxide that inhales.
The technique employed by the concentrator 14 is a visual identification technique; the first grinder 15 is an ultra-fine mill, a vertical mill, a Raymond mill, a ring ball mill, a double-roll crusher 18, a jaw crusher 18 or a hammer crusher 18; the kiln 16 is a tunnel kiln, an electric pusher kiln, a rotary kiln, a suspension furnace or a multi-layer furnace.
The crusher 18 comprises a box body 1, a first crushing assembly 2, a feeding hopper 3, a second crushing assembly 4, a guide assembly 5, a screen 9, a vibrator 10 and a second discharging pipe 11; the first crushing assembly 2 is positioned at the top of the box body 1, the bottom end of the feeding hopper 3 penetrates through the middle of the top wall of the box body 1, and the box body 1 is communicated with the external environment through the feeding hopper 3; the second crushing assembly 4 is positioned at one side of the middle part in the box body 1 close to the bottom, and the second crushing assembly 4 is positioned under the first crushing assembly 2; the screen 9 is fixedly connected to the inner side wall of the bottom of the box body 1, the vibrator 10 is installed in the middle of the lower surface of the screen 9, the guide assembly 5 is located on the side of the second crushing assembly 4, and the guide assembly 5 is communicated with the box body 1; the second discharge pipe 11 penetrates through the middle part of the bottom wall of the box body 1, the box body 1 is communicated with the outside through the second discharge pipe 11, and a second electromagnetic valve 12 is installed on the second discharge pipe 11; a material guide plate 6 is welded on the inner side wall of the box body 1, a first material discharge pipe 7 penetrates through the center of the material guide plate 6, and a first electromagnetic valve 8 is installed on the first material discharge pipe 7; two or more bases 13 are welded on the outer bottom wall of the box body 1; the first crushing assembly 2 comprises a supporting table 201, a first motor 202, a driving wheel 203, a driven wheel 205, a transmission belt 204 and a crushing roller 207, wherein the supporting table 201 is welded on the outer side wall of the box body 1, the first motor 202 is installed on the supporting table 201, the driving wheel 203 is installed on an output shaft of the first motor 202, the output shaft of the first motor 202 is in driving connection with a first rotating shaft 206, a first end of the first rotating shaft 206 penetrates through a bearing on the side wall of the box body 1, and a second end of the first rotating shaft 206 penetrates through a bearing on the inner side wall of the box body 1; the driving wheel 203 and the driven wheel 205 are in transmission connection through the transmission belt 204, a second rotating shaft 208 penetrates through the center of the driven wheel 205, a first end of the second rotating shaft 208 penetrates through a bearing on the side wall of the box body 1, and a second end of the second rotating shaft 208 penetrates through a bearing on the inner side wall of the box body 1; the number of the crushing rollers 207 is two, and the two crushing rollers 207 are respectively sleeved on the surfaces of the first rotating shaft 206 and the second rotating shaft 208; the second crushing assembly 4 comprises an arc-shaped supporting block 401, a grinding groove 402, a grinding wheel 403, an expansion link 405, a first connecting rod 408, a second connecting rod 410 and an electric push rod 409, wherein the arc-shaped supporting block 401 is welded on the inner side wall of the box body 1, the grinding groove 402 is positioned above the arc-shaped supporting block 401, the grinding wheel 403 is positioned in the grinding groove 402, and the grinding wheel 403 is driven by external driving equipment; a first fixing block 404 is welded on the inner side wall of the box body 1, the first fixing block 404 is hinged to a first end of an expansion link 405 through a pin shaft, a second end of the expansion link 405 is hinged to a second fixing block 406 through a pin shaft, the second fixing block 406 is fixedly connected to the outer wall of the grinding groove 402, a third fixing block 407 is fixedly connected to the airing net, the third fixing block 407 is hinged to a first end of a first connecting rod 408 through a pin shaft, a second end of the first connecting rod 408 is fixedly connected to a first end of an electric push rod 409, a second end of the electric push rod 409 is fixedly connected to a first end of a second connecting rod 410, a second end of the second connecting rod 410 is hinged to a fourth fixing block 411 through a pin shaft, and the fourth fixing block 411 is fixedly connected to the outer bottom wall of the grinding groove 402; the guide assembly 5 comprises a transmission case 501, a second motor 502, a partition 503, a third rotating shaft 504, a driving paddle 505, a feeding pipe 506 and a material guiding pipe 507, wherein the outer side wall of the transmission case 501 is fixedly connected with the outer side wall of the case body 1, the second motor 502 is installed on the inner bottom wall of the transmission case 501, the partition 503 is fixedly connected on the inner side wall of the bottom of the transmission case 501, an output shaft of the second motor 502 penetrates through the partition 503 to be in driving connection with the third rotating shaft 504, the driving paddle 505 is installed on the third rotating shaft 504, the feeding pipe 506 penetrates through the case body 1 and the side wall of the transmission case 501 at the same time, the bottom of the case body 1 and the bottom of the transmission case 501 are communicated through the feeding pipe 506, a first end of the material guiding pipe 507 penetrates through the side wall of the top of the transmission case 501, and the material guiding pipe 507 penetrates through the case body 1, and is convexly arranged in the box body 1, and the second end of the material guiding pipe 507 faces the grinding groove 402. When a worker crushes the microcrystalline magnesite by using the crusher 18, the microcrystalline magnesite enters the box body 1 through the feeding hopper 3, the microcrystalline magnesite crushed by the first crushing assembly 2 falls on the material guide plate 6, the first electromagnetic valve 8 is opened, the microcrystalline magnesite falls through the first discharge pipe 7 onto the second breaker assembly 4, and after the second crushing assembly 4 is crushed, the crushed microcrystalline magnesite falls on the screen 9, the microcrystalline magnesite which meets the specification of the screen 9 falls on the inner bottom wall of the box body 1 through the screen 9, and the microcrystalline magnesite which does not meet the specification of the screen 9 is ground again by the second crushing assembly 4 through the guide assembly 5 until the microcrystalline magnesite completely meets the specification, so that the crushing granularity of the microcrystalline magnesite is more uniform.
The specific method for producing the magnesium oxide with the high iodine absorption value by using the system for preparing the magnesium oxide with the high iodine absorption value by using the microcrystalline magnesite comprises the following steps:
step A: crushing: taking microcrystalline magnesite as a raw material, and crushing the microcrystalline magnesite to a certain granularity by using the crusher 18;
and B: mineral separation: using the concentrator 14 and utilizing a visual identification technology to perform fine beneficiation on the microcrystalline magnesite with a certain granularity in the step a, so that the microcrystalline magnesite reaches a certain purity;
and C: secondary processing: performing secondary processing on the microcrystalline magnesite refined by the visual recognition technology in the step B to a certain granularity by using the first grinding machine 15;
step D: and (3) calcining: calcining the microcrystalline magnesite after secondary processing in the step C in the kiln 16;
step E: grinding: and D, grinding the microcrystalline magnesite calcined in the step D by using the second grinding machine 17 to obtain the magnesium oxide with high iodine absorption value.
In the step A, the crushing granularity of the microcrystalline magnesite is 20-200 mm;
in the step B, the visual identification technology is adopted for the microcrystalline magnesite to enable the MgO content of the microcrystalline magnesite ore to reach more than 47.3%;
in the step C, the secondary processing granularity of the microcrystalline magnesite is 1 mu m-20 mm; the secondary processing equipment for the microcrystalline magnesite comprises an ultrafine mill, a vertical mill, a Raymond mill, a ring ball mill, a double-roll crusher 18, a jaw crusher 18, a hammer crusher 18 and the like;
in step D, the calcining temperature of the kiln 16 is: the calcining time is as follows at 600-1200 deg.C: 0.5h-5 h; the kiln 16 is a tunnel kiln, an electric pusher kiln, a rotary kiln, a suspension furnace, a multilayer furnace and the like;
in step E, the calcined microcrystalline magnesite has a grinding particle size of < 0.15 mm;
the content wMgO of the magnesium oxide with high iodine absorption value is more than or equal to 98 percent, and the iodine absorption value is more than or equal to 150mgI2/gMgO。
SiO in the microcrystalline magnesite2Containing 0.06 wt% of Al2O3Containing 0.02 wt% of Fe2O3Containing 0.04 wt% of TiO20.02 wt%, CaO 0.57 wt%, and MgO 47.20 wt%; the scorching of the microcrystalline magnesite is as follows: 51.76 wt%. Unlike the previous method of producing magnesia with high iodine value by using bittern or sea water as material and through liquid magnesium salt synthesis process and solid dolomite as material and through dolomite carbonization process, the solid microcrystal magnesite as material is first calcined to produce magnesia with high iodine value. The magnesium oxide with high iodine absorption value prepared by the utility model has simple production process, easy process control and low cost; the prepared magnesium oxide has high purity, the MgO content is more than or equal to 98 percent, and the iodine absorption value is more than or equal to 150mgI 2/gMgO; meanwhile, the utilization rate and the added value of the magnesite are improved, and the application field of the magnesite is expanded.
Example 2
Crushing the microcrystalline magnesite to 40-100mm, performing color separation through a color separator, performing secondary processing through a jaw crusher 18, processing the ore particle size to 8-20mm, calcining in a tunnel kiln, keeping the calcining temperature at 1000 ℃ for 2h, cooling, grinding to be less than 0.1mm, performing chemical analysis and iodine absorption value detection on the product, wherein the content of magnesium oxide (wMgO) is 98.5%, and the iodine absorption value is 186.2mgI 2/gMgO.
Example 3
Crushing the microcrystalline magnesite to 60-150mm, performing color sorting through a color sorter, performing secondary processing through a jaw crusher 18, a double-roller crusher 18 and an ultrafine mill, processing the ore particle size to be less than 0.074mm, calcining in an electric push plate kiln, keeping the calcining temperature at 650 ℃ for 3.5h, cooling, grinding to be less than 0.045mm, and performing chemical analysis and iodine absorption value detection on the product, wherein the content of magnesium oxide (wMgO) is 98.4 percent, and the iodine absorption value is 191.6mgI 2/gMgO.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (7)
1. A system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite is characterized by comprising a crusher (18), a concentrating machine (14), a first grinding machine (15), a kiln (16) and a second grinding machine (17);
the discharge end of the crusher (18) is communicated with the feed end of the concentrator (14); the discharge end of the concentrator (14) is communicated with the feed end of the first grinding mill (15); the discharge end of the first grinding machine (15) is communicated with the feed end of the kiln (16); the discharge end of the kiln (16) is communicated with the feed end of the second grinding machine (17).
2. A system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite according to claim 1, characterized in that the adopted technology of the concentrating machine (14) is visual identification technology; the first grinding machine (15) is an ultra-fine mill, a vertical mill, a Raymond mill, a ring ball mill, a double-roll crusher (18), a jaw crusher (18) or a hammer crusher (18); the kiln (16) is a tunnel kiln, an electric pusher kiln, a rotary kiln, a suspension furnace or a multilayer furnace.
3. The system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite according to claim 1, wherein the crusher (18) comprises a box body (1), a first crushing assembly (2), an inlet hopper (3), a second crushing assembly (4), a guide assembly (5), a screen (9), a vibrator (10) and a second discharge pipe (11);
the first crushing assembly (2) is positioned at the top of the box body (1), the bottom end of the feeding hopper (3) penetrates through the middle of the top wall of the box body (1), and the box body (1) is communicated with the external environment through the feeding hopper (3); the second crushing assembly (4) is positioned at one side of the middle part in the box body (1) close to the bottom, and the second crushing assembly (4) is positioned under the first crushing assembly (2); the screen (9) is fixedly connected to the inner side wall of the bottom of the box body (1), the vibrator (10) is installed in the middle of the lower surface of the screen (9), the guide assembly (5) is located on the side of the second crushing assembly (4), and the guide assembly (5) is communicated with the box body (1); the second discharging pipe (11) penetrates through the middle of the bottom wall of the box body (1), the box body (1) is communicated with the outside through the second discharging pipe (11), and a second electromagnetic valve (12) is installed on the second discharging pipe (11).
4. The system for preparing magnesium oxide with high iodine absorption value by utilizing microcrystalline magnesite according to claim 3, wherein a material guide plate (6) is welded on the inner side wall of the box body (1), a first material discharge pipe (7) penetrates through the center of the material guide plate (6), and a first electromagnetic valve (8) is installed on the first material discharge pipe (7); two or more bases (13) are welded on the outer bottom wall of the box body (1).
5. The system for preparing the magnesium oxide with high iodine absorption value by utilizing the microcrystalline magnesite according to the claim 3, characterized in that the first crushing component (2) comprises a support platform (201), a first motor (202), a driving wheel (203), a driven wheel (205), a transmission belt (204) and a crushing roller (207), the supporting platform (201) is welded on the outer side wall of the box body (1), the first motor (202) is arranged on the supporting platform (201), the driving wheel (203) is arranged on an output shaft of the first motor (202), the output shaft of the first motor (202) is connected with a first rotating shaft (206) in a driving way, the first end of the first rotating shaft (206) penetrates through a bearing on the side wall of the box body (1), the second end of the first rotating shaft (206) is arranged in a bearing on the inner side wall of the box body (1) in a penetrating mode; the driving wheel (203) is in transmission connection with the driven wheel (205) through the transmission belt (204), a second rotating shaft (208) penetrates through the center of the driven wheel (205), a first end of the second rotating shaft (208) penetrates through a bearing on the side wall of the box body (1), and a second end of the second rotating shaft (208) penetrates through a bearing on the inner side wall of the box body (1); the number of the crushing rollers (207) is two, and the two crushing rollers (207) are respectively sleeved on the surfaces of the first rotating shaft (206) and the second rotating shaft (208).
6. The system for preparing magnesium oxide with high iodine value by using microcrystalline magnesite according to claim 3, wherein the second crushing assembly (4) comprises an arc-shaped supporting block (401), a grinding groove (402), a grinding wheel (403), a telescopic rod (405), a first connecting rod (408), a second connecting rod (410) and an electric push rod (409), the arc-shaped supporting block (401) is welded on the inner side wall of the box body (1), the grinding groove (402) is positioned above the arc-shaped supporting block (401), the grinding wheel (403) is positioned in the grinding groove (402), and the grinding wheel (403) is driven by external driving equipment; the inner side wall of the box body (1) is welded with a first fixed block (404), the first fixed block (404) is hinged with the first end of the telescopic rod (405) through a pin shaft, the second end of the telescopic rod (405) is hinged with a second fixed block (406) through a pin shaft, the second fixed block (406) is fixedly connected onto the outer wall of the grinding groove (402), the screen (9) is fixedly connected with a third fixed block (407), the third fixed block (407) is hinged with the first end of the first connecting rod (408) through a pin shaft, the second end of the first connecting rod (408) is fixedly connected with the first end of the electric push rod (409), the second end of the electric push rod (409) is fixedly connected with the first end of the second connecting rod (410), the second end of the second connecting rod (410) is hinged with a fourth fixed block (411) through a pin shaft, the fourth fixing block (411) is fixedly connected to the outer bottom wall of the grinding groove (402).
7. The system for preparing magnesium oxide with high iodine absorption value by using microcrystalline magnesite according to claim 6, wherein the guiding assembly (5) comprises a transmission case (501), a second motor (502), a partition plate (503), a third rotating shaft (504), a transmission paddle (505), a feeding pipe (506) and a material guiding pipe (507), the outer side wall of the transmission case (501) is fixedly connected with the outer side wall of the case (1), the second motor (502) is installed on the inner bottom wall of the transmission case (501), the partition plate (503) is fixedly connected on the inner side wall of the bottom of the transmission case (501), the output shaft of the second motor (502) penetrates through the partition plate (503) to be in driving connection with the third rotating shaft (504), the transmission paddle (505) is installed on the third rotating shaft (504), the feeding pipe (506) penetrates through the case (1) and the side wall of the transmission case (501) simultaneously, the bottom of the box body (1) is communicated with the bottom of the transmission box (501) through the feeding pipe (506), the first end of the material guide pipe (507) penetrates through the side wall of the top of the transmission box (501), the material guide pipe (507) penetrates through the box body (1) and is convexly arranged in the box body (1), and the second end of the material guide pipe (507) faces the grinding groove (402).
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