CN115846016B - Air flow mill and grinding method for preparing high-activity steel slag micro powder from waste steel slag - Google Patents
Air flow mill and grinding method for preparing high-activity steel slag micro powder from waste steel slag Download PDFInfo
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Abstract
The invention relates to the technical field of air grinding, and discloses an air mill and a grinding method for preparing high-activity steel slag micro powder from waste steel slag.
Description
Technical Field
The invention relates to the technical field of air grinding, in particular to an air grinding and grinding method for preparing high-activity steel slag micro powder from waste steel slag.
Background
The jet mill is also called a jet mill, such as jet mill, which mainly sprays materials to a grinding cavity through a high-pressure nozzle, and then sprays and gathers high-speed airflow impact energy and airflow rapid expansion to form collision and friction force generated by fluidized bed suspension boiling to grind the materials through a plurality of relatively arranged nozzles. Coarse powder and fine powder are forced to pass through the screening device arranged at the top, the fine powder is captured by the cyclone collector and the bag-type dust collector, and the coarse powder is thrown to four walls by gravity and centrifugal force generated by the screening device rotating at high speed, and is settled and returned to the crushing cavity to be continuously crushed.
However, in the actual use process, as coarse powder in the waste steel slag is thrown to four walls and then is settled only by gravity, the time required by descending is prolonged, on the other hand, the settled material cannot accurately fall to the convergence position of the high-pressure air flow nozzle, so that the coarse powder cannot realize quick secondary collision after the settlement is finished, and the reprocessing efficiency of the filtered coarse powder is low; on the other hand, the high-speed air flow drives the material to be ejected, so that the material is guaranteed to be delivered to the junction of the high-speed air flow, but the abrasion of the material to the feeding nozzle is aggravated after the material is accelerated by the high-speed air flow, and the abrasion of the feeding assembly is aggravated.
Disclosure of Invention
Aiming at the defects of the conventional jet mill in the use process, the invention provides a jet mill and a grinding method for preparing high-activity steel slag micro powder from waste steel slag, has the advantages of accelerating coarse powder sedimentation and re-grinding, and solves the technical problems in the prior art.
The invention provides the following technical scheme: the utility model provides an air current mill for high activity slag miropowder is prepared to steel scrap, includes the endotheca, the bottom fixed mounting of endotheca has the air make-up pipe, and the fixed mounting in one end of air make-up pipe has the shell with the endotheca parcel, the bottom fixed mounting of shell has the landing leg, the crushing room that opens upwards is seted up to the inner wall of endotheca, and the inside of shell has seted up the conveying room, the endotheca is located the conveying room, the top movable mounting of shell has the conveying pipeline, and the bottom fixed mounting of conveying pipeline has the filter element that is located the crushing room top, the surface fixed mounting of shell has driving motor, and driving motor's output shaft fixed mounting has the drive gear that carries out pivoted with the conveying pipeline, the middle part outside fixed mounting of endotheca has the air current ring pipe, the inner wall fixed mounting of endotheca has the air current nozzle that communicates with the air current ring pipe, the inner wall fixed mounting of shell has the intake pipe to the air current of feeding compressed air current in the air current, the inner wall bottom fixed mounting of endotheca has the spout pipe that is located the air current nozzle below, and spouts the material pipe realization crushing room communicates each other with the conveying room bottom, be provided with the raw materials that the air current nozzle is supplied to the air current to the suction pipe on the shell.
Preferably, the number of the air flow nozzles is four, the four air flow nozzles are arranged on the inner wall of the inner sleeve at equal angles, an included angle of fifteen degrees is formed between the center line of the air flow nozzles and the bottom surface of the inner wall of the inner sleeve, and the material spraying guide pipe is positioned below the air flow intersection center of the air flow nozzles.
Preferably, the filter element is provided with an inverted cone shape.
Preferably, the material sucking pipe is arranged on the inner side of the material spraying guide pipe, the material sucking pipe is fixedly arranged at the bottom of the shell, the bottom end of the material sucking pipe penetrates through the shell and is positioned below the shell, the material storage box is fixedly arranged at the bottom of the shell, the material sucking pipe is positioned at the bottom of the inner wall of the material storage box, and the side wall of the material storage box is provided with a feeding port.
Preferably, the bottom of the inner wall of the inner sleeve is provided with a diversion ring groove positioned at the outer side of the material spraying guide pipe, the bottom of the inner wall of the inner sleeve is provided with at least four air injection holes communicated with the diversion ring groove, the air supplementing pipe on the shell is communicated with the diversion ring groove, and the bottom of the shell is provided with an air supplementing passage communicated with the air supplementing pipe.
Preferably, the bottom side wall threaded connection of shell has adjusting bolt, and adjusting bolt central line and the air make-up way central line mutually perpendicular, realizes that adjusting bolt screws in and changes the flow area between air make-up way and the air make-up pipe.
An air flow mill grinding method for preparing high-activity steel slag micro powder from waste steel slag comprises the following steps:
s1, placing scrap steel slag raw materials into a storage box, connecting an air inlet pipe into compressed air flow, and driving a motor to drive a conveying pipe and a filtering piece to rotate through a transmission gear;
s2, compressed air flow in the air flow nozzle is ejected upwards, the material sucked by the material sucking pipe is sent to the intersection of the compressed air flow of the air flow nozzle, and the air flow nozzle blows the raw material to the filter element after collision;
s3, outputting coarse powder into a material conveying chamber by centrifugal force generated by blowing and rotating of the filter element by air flow, and outputting fine powder from a material conveying pipe to a next process;
s4, coarse powder in the material conveying chamber is subjected to self gravity and suction force generated by the crushing chamber to the material conveying chamber, so that coarse powder sedimentation is accelerated, and the coarse powder is sent to an air flow nozzle from a material spraying guide pipe to be crushed again;
s5, controlling screwing of the adjusting bolt to enable the total amount of the external air input from the air injection hole to the crushing chamber to change, on one hand, realizing that coarse powder settled at the bottom of the crushing chamber is blown up again for crushing, and on the other hand, controlling the suction force of the raw material sucked by the suction pipe by controlling the change of the external air quantity, namely controlling the raw material feeding rate;
s6, according to the above, the circulation work is carried out, and the air grinding and crushing of the scrap steel slag raw material are completed.
The invention has the following beneficial effects:
1. according to the invention, the outer shell is arranged on the outer side of the inner sleeve, the filtering piece is arranged in a conical shape, so that coarse powder is conveyed to the material conveying chamber by centrifugal force and airflow thrust when the filtering piece filters powder, the airflow nozzle continuously shoots compressed airflow upwards at the moment, the pressure at the bottom of the crushing chamber is reduced, the bottom of the crushing chamber is enabled to suck airflow from the material conveying chamber, coarse powder in the material conveying chamber is subjected to gravity sedimentation and accelerated airflow flow, the sedimentation of coarse powder in the material conveying chamber is accelerated, the sucked airflow also shoots the coarse powder from the material spraying guide pipe, the filtered coarse powder is directly sprayed to the airflow junction in the airflow nozzle, and the purposes of secondary crushing and accelerating coarse powder sedimentation and secondary crushing are finally achieved.
2. According to the invention, the suction pipe is arranged in the material spraying guide pipe and connected to the waste steel slag raw material in the material storage box through the suction pipe, so that when the airflow in the airflow nozzle is impacted and crushed, suction force is generated on the raw material in the suction pipe in the crushing chamber, and then the raw material in the material storage box is automatically sucked to the intersection of the airflow nozzle, the mode that the raw material is sprayed out while high-pressure jet is replaced, the phenomenon that the suction pipe is worn seriously due to continuous intervention of compressed airflow is reduced, and finally the purpose of self-suction feeding is achieved.
3. According to the invention, the air supplementing pipe is arranged at the bottom of the inner sleeve, and the adjusting bolt for controlling the air flow conveying amount of the air supplementing pipe is arranged on the outer shell, so that during operation, coarse powder settled at the bottom of the crushing chamber is blown up by the air flow inhaled by the air supplementing pipe, raw material aggregation at the bottom of the crushing chamber is avoided, and on the other hand, the air inflow in the air supplementing pipe is changed by controlling the adjusting bolt, so that the air flow suction force of the bottom of the crushing chamber to the material sucking pipe and the material spraying pipe is changed, the raw material amount inhaled into the material sucking pipe is further controlled, the feeding controllability of the material sucking pipe is ensured, and finally the purposes of raw material aggregation prevention and controllable feeding are achieved.
Drawings
FIG. 1 is a schematic diagram of the overall outline structure of the present invention;
FIG. 2 is a schematic view of the overall three-dimensional internal structure of the present invention;
FIG. 3 is a schematic view of the overall front cross-sectional structure of the present invention;
FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 at A-A in accordance with the present invention.
In the figure: 1. an inner sleeve; 2. a pulverizing chamber; 3. a housing; 4. a material conveying chamber; 5. a filter; 6. a material conveying pipe; 7. a transmission gear; 8. a driving motor; 9. an air flow nozzle; 10. an air inlet pipe; 11. an air flow collar; 12. a support leg; 13. a storage bin; 14. a suction pipe; 15. air supplementing channels; 16. an adjusting bolt; 17. an air supplementing pipe; 18. a split ring groove; 19. a gas injection hole; 20. and a spraying guide pipe.
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. 1-3, an air mill for preparing high-activity steel slag micropowder from steel slag comprises an inner sleeve 1, wherein an air supplementing pipe 17 is fixedly arranged at the bottom of the inner sleeve 1, a shell 3 for wrapping the inner sleeve 1 is fixedly arranged at one end of the air supplementing pipe 17, a supporting leg 12 for supporting is fixedly arranged at the bottom of the shell 3, an upward opening crushing chamber 2 is arranged on the inner wall of the inner sleeve 1, a conveying chamber 4 is arranged in the shell 3, the inner sleeve 1 is positioned in the conveying chamber 4, a conveying pipe 6 is movably arranged at the top of the shell 3, a filtering piece 5 positioned at the top of the crushing chamber 2 is fixedly arranged at the bottom of the conveying pipe 6, a driving motor 8 is fixedly arranged on the surface of the shell 3, a transmission gear 7 for rotating the conveying pipe 6 is fixedly arranged at the output shaft of the driving motor 8, and an air flow ring pipe 11 is fixedly arranged at the outer side of the middle part of the inner sleeve 1, an air flow nozzle 9 communicated with an air flow circular pipe 11 is fixedly arranged on the inner wall of the inner sleeve 1, an air inlet pipe 10 for supplying compressed air flow into the air flow circular pipe 11 is fixedly arranged on the inner wall of the outer shell 3, meanwhile, a spraying guide pipe 20 positioned below the air flow nozzle 9 is fixedly arranged on the bottom of the inner wall of the inner sleeve 1, the spraying guide pipe 20 is communicated with the bottom of the material conveying chamber 4, a material sucking pipe 14 for supplying raw materials into the air flow nozzle 9 is arranged on the outer shell 3, so that the raw materials in the material sucking pipe 14 are crushed according to the compressed air flow generated by the air flow nozzle 9 and filtered by a filtering piece 5, coarse powder filtered by the filtering piece is output into the material conveying chamber 4, and the coarse powder is independently settled in the material conveying chamber 4 and the suction force to the spraying guide pipe 20 is generated at the bottom of the crushing chamber 2, so that the settling rate of the coarse powder in the material conveying chamber 4 is enhanced, and the coarse powder after sedimentation is placed at the air flow nozzle 9 along with the air flow, so that the compressed air flow emitted by the air flow nozzle 9 breaks the coarse powder again, thereby enhancing the rate of secondary breaking of the coarse powder.
Referring to fig. 3 and 4, in order to enhance the adsorption air flow generated at the bottom of the crushing chamber 2 and jet the acceleration air flow to the filtering member 5, the number of the air flow nozzles 9 is four, the four air flow nozzles 9 are equiangularly arranged on the inner wall of the inner sleeve 1, the center line of the air flow nozzles 9 forms an angle of fifteen degrees with the bottom surface of the inner wall of the inner sleeve 1, and the jet guide 20 is positioned below the center of the air flow intersection of the air flow nozzles 9, so that the air flow nozzle 9 is obliquely arranged upwards in the inner sleeve 1, the blown high-speed air flow can accelerate upwards, so that a stronger suction force is generated at the bottom of the crushing chamber 2, and the jet guide 20 is positioned below the air flow intersection of the air flow nozzles 9, so that the jet guide 20 is directly positioned in the air flow intersection of the air flow nozzles 9 after sucking coarse powder, and the coarse powder is directionally conveyed, so that the grinding efficiency is enhanced.
Referring to fig. 2 and 3, in order to implement the filtration of the powder in the crushing chamber 2 by the filter element 5, the filter element 5 is configured to be inverted cone, so that after being impacted by the airflow, the filter element 5 outputs coarse powder into the material conveying chamber 4 through the airflow and centrifugal force generated by rotation of the filter element 5, and the filter element 5 directly collides with the airflow in the crushing chamber 2, so that the fine powder in the airflow is directly input into the material conveying pipe 6 and conveyed to the subsequent process through the material conveying pipe 6, and the subsequent normal operation is ensured.
Referring to fig. 2 and 3, in order to achieve feeding of the material, the suction pipe 14 is disposed inside the material spraying conduit 20, the suction pipe 14 is fixedly mounted with the bottom of the housing 3, the bottom end of the suction pipe 14 passes through the housing 3 and is located below the housing 3, the storage box 13 is fixedly mounted at the bottom of the housing 3, the suction pipe 14 is located at the bottom of the inner wall of the storage box 13, and a feeding port is formed in the side wall of the storage box 13, so that feeding of the material is achieved through the feeding port, and when the material is sucked according to the airflow in the crushing chamber 2, an upward suction force is synchronously generated in the suction pipe 14, so that the material in the storage box 13 is sucked into the airflow intersection of the airflow nozzle 9, thereby achieving feeding of the material.
Referring to fig. 1 and 3, in order to prevent the aggregation of coarse powder at the bottom of the pulverizing chamber 2, a flow dividing ring groove 18 located at the outer side of the material spraying pipe 20 is formed at the bottom of the inner wall of the inner sleeve 1, at least four air spraying holes 19 are formed at the bottom of the inner wall of the inner sleeve 1 and are communicated with the flow dividing ring groove 18, an oblique angle is formed at the end surface of the air spraying holes 19, and an air supplementing pipe 17 on the outer shell 3 is communicated with the flow dividing ring groove 18, meanwhile, an air supplementing channel 15 communicated with the air supplementing pipe 17 is formed at the bottom of the outer shell 3, so that the suction force generated through the bottom of the pulverizing chamber 2 is applied to the air spraying holes 19 in the actual use process, and external air flow is sucked according to the air spraying holes 19, and meanwhile, powder material placed on the air spraying holes 19 is blown upwards, so that the aggregation of powder at the bottom of the pulverizing chamber 2 is avoided.
Referring to fig. 1-3, in order to control the feeding rate of the material in the material sucking pipe 14, an adjusting bolt 16 is screwed on the bottom side wall of the housing 3, and the center line of the adjusting bolt 16 is perpendicular to the center line of the air supplementing channel 15, so that the flow area between the air supplementing channel 15 and the air supplementing channel 17 is changed by screwing the adjusting bolt 16, the amount of external air entering the bottom of the crushing chamber 2 is controlled by screwing the adjusting bolt 16 in the actual working process, the suction force generated by the bottom of the crushing chamber 2 on the material sucking pipe 14 is controlled, and the material sucking rate of the material sucking pipe 14 is changed by changing the suction force.
Aiming at an air flow grinding method for preparing high-activity steel slag micro powder from waste steel slag, the method comprises the following steps:
s1, placing the scrap steel slag raw material into a storage box 13, connecting an air inlet pipe 10 into compressed air flow, and driving a motor 8 to drive a conveying pipe 6 and a filtering piece 5 to rotate through a transmission gear 7.
S2, compressed air flow in the air flow nozzle 9 is ejected upwards, the material is sucked by the material suction pipe 14 and sent to the compressed air flow junction of the air flow nozzle 9, and the air flow nozzle 9 blows the raw material to the filter element 5 after collision.
S3, outputting coarse powder into the conveying chamber 4 by centrifugal force generated by air flow blowing and rotation of the filter element 5, and outputting fine powder from the conveying pipe 6 to the next process.
S4, coarse powder in the material conveying chamber 4 is subjected to self gravity and suction force generated by the crushing chamber 2 on the material conveying chamber 4, so that coarse powder sedimentation is accelerated, and the coarse powder is sent to the air flow nozzle 9 from the material spraying conduit 20, so that re-crushing is realized.
S5, controlling screwing of the adjusting bolt 16 to enable the total amount of external air input into the crushing chamber 2 from the air injection hole 19 to change, on one hand, realizing that coarse powder settled at the bottom of the crushing chamber 2 is blown up again for crushing, and on the other hand, controlling the external air amount to change, and further controlling the suction force of the raw material sucked by the suction pipe 14, namely controlling the raw material feeding rate.
S6, according to the above, the circulation work is carried out, and the air grinding and crushing of the scrap steel slag raw material are completed.
The working principle of the invention is as follows: when the device is used, the waste steel slag raw material is sent into the storage box 13 from the feeding port, then compressed air is sent into the air flow ring pipe 11 through the air inlet pipe 10, the air flow nozzle 9 is enabled to blow the compressed air flow to the center of the crushing chamber 2 through the air flow ring pipe 11, and the driving motor 8 drives the filter element 5 to synchronously rotate through the conveying pipe 6 through the transmission gear 7.
When the air flow in the air flow nozzle 9 continuously blows upwards, suction force is generated at the bottom of the crushing chamber 2, raw materials in the suction pipe 14 are sucked out of the storage box 13 and sprayed to the intersection of the air flow nozzle 9 through the sucked raw materials, the raw materials are mutually collided by compressed air flow sprayed by the air flow nozzle 9, the raw materials collided into powder are conveyed upwards through the filtering piece 5, fine powder is output through the conveying pipe 6 after being filtered by the filtering piece 5, coarse powder is blown into the conveying chamber 4 through the rotating centrifugal force of the filtering piece 5 and the upward impact force of the air flow, at the same time, suction force generated at the bottom of the crushing chamber 2 is generated, the air flow in the conveying chamber 4 is caused to flow through the spraying guide pipe 20 to the crushing chamber 2, coarse powder in the conveying chamber 4 is subjected to gravity and the air flow in the conveying chamber 4 to accelerate sedimentation, and after being placed at the bottom of the crushing chamber 2, the suction force generated in the spraying guide pipe 20 is caused to be sprayed out from the spraying guide pipe 20 again, and the raw materials in the suction pipe 14 are followed to be crushed again through the air flow nozzle 9, so that the filtered coarse powder is crushed again.
If the bottom of the crushing chamber 2 is settled, the settled coarse powder is conveyed to the split ring groove 18 by external air flow through the air supplementing channel 15 and the air supplementing pipe 17, and the air flow in the split ring groove 18 is blown upwards from the air spraying holes 19 by the suction force generated by the bottom of the crushing chamber 2, so that the coarse powder settled in the crushing chamber 2 is crushed again.
When the feeding rate of the raw materials in the suction pipe 14 is to be controlled, the adjusting bolt 16 is controlled to rotate, the air flow area between the air supplementing channel 15 and the air supplementing channel 17 is limited by the adjusting bolt 16, when the feeding rate needs to be reduced, the air flow area is increased, at the moment, the external air can be largely gushed into the split ring groove 18 by the suction force generated at the bottom of the crushing chamber 2 and is ejected from the air ejecting holes 19, so that the suction force in the suction pipe 14 is reduced, and the raw materials in the suction pipe 14 are reduced to be ejected, and similarly, when the feeding rate is increased, the flow area between the air supplementing channel 15 and the air supplementing channel 17 is reduced, the suction force of the suction pipe 14 is promoted to be enhanced, and the suction of the materials is accelerated, so that the control of the feeding rate of the materials is realized.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (6)
1. The jet mill for preparing high-activity steel slag micro powder from waste steel slag comprises an inner sleeve (1), and is characterized in that: the utility model is characterized in that an air supplementing pipe (17) is fixedly arranged at the bottom of the inner sleeve (1), a shell (3) wrapping the inner sleeve (1) is fixedly arranged at one end of the air supplementing pipe (17), a supporting leg (12) is fixedly arranged at the bottom of the shell (3), a crushing chamber (2) with an upward opening is arranged on the inner wall of the inner sleeve (1), a conveying chamber (4) is arranged in the shell (3), a conveying pipe (6) is movably arranged at the top of the shell (3), a filtering piece (5) arranged at the top of the crushing chamber (2) is fixedly arranged at the bottom of the conveying pipe (6), the surface of the shell (3) is fixedly provided with a driving motor (8), an output shaft of the driving motor (8) is fixedly provided with a transmission gear (7) for rotating the conveying pipe (6), the outer side of the middle part of the inner sleeve (1) is fixedly provided with an air flow ring pipe (11), the inner wall of the inner sleeve (1) is fixedly provided with an air flow nozzle (9) communicated with the air flow ring pipe (11), the inner wall of the shell (3) is fixedly provided with an air inlet pipe (10) for feeding compressed air into the air flow ring pipe (11), the bottom of the inner wall of the inner sleeve (1) is fixedly provided with a spraying guide pipe (20) positioned below the air flow nozzle (9), the material spraying guide pipe (20) is used for realizing the mutual communication between the crushing chamber (2) and the bottom of the material conveying chamber (4), and the shell (3) is provided with a material sucking pipe (14) for supplying raw materials to the air flow nozzle (9);
the spraying guide pipe (20) is positioned below the air flow intersection center of the air flow nozzle (9);
the filter element (5) is of an inverted cone shape;
the air flow nozzle (9) is arranged obliquely upwards in the inner sleeve (1);
the high-speed airflow blown out by the airflow nozzle (9) can enable the bottom of the crushing chamber (2) to generate stronger suction, the suction generated by the bottom of the crushing chamber (2) sucks raw materials into the airflow intersection of the airflow nozzle (9) through the suction pipe (14), coarse powder at the bottom of the conveying chamber (4) is sucked into the airflow intersection of the airflow nozzle (9) through the material spraying pipe (20), and the air supplementing pipe (17) is further enabled to be supplied into the airflow from the outside to realize upward crushing of powder at the bottom of the crushing chamber (2).
2. The jet mill for preparing high-activity steel slag micro powder from waste steel slag according to claim 1, which is characterized in that: the number of the air flow nozzles (9) is four, the four air flow nozzles (9) are arranged on the inner wall of the inner sleeve (1) at equal angles, and an included angle of fifteen degrees is formed between the center line of the air flow nozzles (9) and the bottom surface of the inner wall of the inner sleeve (1).
3. The jet mill for preparing high-activity steel slag micro powder from waste steel slag according to claim 2, which is characterized in that: the utility model discloses a material spraying device, including shell (3), material pipe (14) and shell (3), material pipe (14) are drawn in the inboard setting at spouting material pipe (20), and the bottom fixed mounting of material pipe (14) and shell (3), material pipe (14) bottom passes shell (3) and is located shell (3) below, the bottom fixed mounting of shell (3) has storage case (13), and material pipe (14) are located the inner wall bottom of storage case (13), the pay-off mouth has been seted up to the lateral wall of storage case (13).
4. An air mill for preparing high-activity steel slag micro powder from waste steel slag according to claim 3, which is characterized in that: the inner wall bottom of the inner sleeve (1) is provided with a diversion ring groove (18) positioned at the outer side of the material spraying guide pipe (20), the inner wall bottom of the inner sleeve (1) is provided with at least four air holes (19) communicated with the diversion ring groove (18), the air supplementing pipe (17) on the outer shell (3) is communicated with the diversion ring groove (18), and the bottom of the outer shell (3) is provided with an air supplementing passage (15) communicated with the air supplementing pipe (17).
5. The jet mill for preparing high-activity steel slag micro powder from waste steel slag according to claim 4, wherein the jet mill comprises the following components: the bottom side wall of the shell (3) is in threaded connection with an adjusting bolt (16), the center line of the adjusting bolt (16) is perpendicular to the center line of the air supplementing channel (15), and the purpose that the adjusting bolt (16) is screwed in to change the flow area between the air supplementing channel (15) and the air supplementing channel (17) is achieved.
6. An air flow mill grinding method for preparing high-activity steel slag micro powder from waste steel slag according to claim 5, which is characterized by comprising the following steps:
s1, placing scrap steel slag raw materials into a storage box (13), connecting an air inlet pipe (10) into compressed air flow, and driving a motor (8) to drive a conveying pipe (6) and a filtering piece (5) to rotate through a transmission gear (7);
s2, compressed air flow in the air flow nozzle (9) is ejected upwards, a suction pipe (14) sucks materials and sends the materials to the intersection of the compressed air flow of the air flow nozzle (9), and the air flow nozzle (9) blows the raw materials to the filter element (5) after collision;
s3, outputting coarse powder into a conveying chamber (4) by centrifugal force generated by blowing and rotation of the filter element (5) through air flow, and outputting fine powder from a conveying pipe (6) to a next process;
s4, coarse powder in the conveying chamber (4) is subjected to self gravity and suction force generated by the crushing chamber (2) on the conveying chamber (4), so that coarse powder sedimentation is accelerated, and the coarse powder is sent to an air flow nozzle (9) from a spraying guide pipe (20) to be crushed again;
s5, controlling screwing of the adjusting bolt (16) to enable the total amount of external air input into the crushing chamber (2) from the air injection hole (19) to change, on one hand, realizing that coarse powder settled at the bottom of the crushing chamber (2) is blown up again for crushing, and on the other hand, controlling the suction force of the raw material sucked by the suction pipe (14) by controlling the change of the external air quantity, namely controlling the feeding rate of the raw material;
s6, according to the above, the circulation work is carried out, and the air grinding and crushing of the scrap steel slag raw material are completed.
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| CN202211571323.7A CN115846016B (en) | 2022-12-08 | 2022-12-08 | Air flow mill and grinding method for preparing high-activity steel slag micro powder from waste steel slag |
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| CN202211571323.7A CN115846016B (en) | 2022-12-08 | 2022-12-08 | Air flow mill and grinding method for preparing high-activity steel slag micro powder from waste steel slag |
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| CN115846016B true CN115846016B (en) | 2023-09-08 |
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| CN117861810B (en) * | 2024-03-12 | 2024-05-28 | 陕西秦岭云材料制造有限公司 | Air flow grinding device for plastic master batch production and production process thereof |
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