CN114345473A

CN114345473A - Method for preparing cement micro-material by using solid waste

Info

Publication number: CN114345473A
Application number: CN202210070458.9A
Authority: CN
Inventors: 宋江勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-04-15

Abstract

The invention relates to a method for preparing cement micro-materials by utilizing solid wastes, which uses equipment for preparing the cement micro-materials by utilizing the solid wastes, and can solve the following problems in the prior equipment during grinding the solid wastes: 1. the existing equipment cannot ensure that solid waste is thoroughly ground into powder, and common equipment cannot effectively screen the solid waste after grinding, so that the solid waste which is not completely ground into powder is completely mixed together, and the grinding cannot achieve a good effect. 2. The existing equipment (such as a ball mill) for grinding adopts harder objects such as steel balls, steel rods or gravels and the like to smash substances to be ground by using the impact force of the harder objects, and because the harder objects such as the steel balls, the steel rods or the gravels and the like have larger distance during the operation of the equipment, a part of the substances to be ground are not smashed by the impact, so that more substance particles to be ground still exist in the ground substances.

Description

Method for preparing cement micro-material by using solid waste

Technical Field

The invention relates to the technical field of cement preparation, in particular to a method for preparing a cement micro-material by utilizing solid wastes.

Background

The production and application of cement take a certain important position in national economy and social development, but for a long time, the traditional cement production technology and process are at the cost of consuming a large amount of mineral resources and high energy consumption and high pollution, in order to reduce the generation and discharge of input wastes and pollutants of energy and mineral resources to the minimum and to ensure that byproducts in the manufacturing process can be reused, a method for refining cement by using solid wastes as raw materials is proposed, when the cement is refined by using the solid wastes, the solid wastes need to be crushed and ground, and the crushed waste particles are ground into powder.

However, the existing equipment has the following problems when grinding solid wastes:

1. the existing equipment cannot ensure that solid waste is thoroughly ground into powder, and common equipment cannot effectively screen the solid waste after grinding, so that the solid waste which is not completely ground into powder is completely mixed together, and the grinding cannot achieve a good effect.

2. The existing equipment (such as a ball mill) for grinding adopts harder objects such as steel balls, steel rods or gravels and the like to smash substances to be ground by using the impact force of the harder objects, and because the harder objects such as the steel balls, the steel rods or the gravels and the like have larger distance during the operation of the equipment, a part of the substances to be ground are not smashed by the impact, so that more substance particles to be ground still exist in the ground substances.

Disclosure of Invention

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a method for preparing cement micro-aggregate by utilizing solid waste uses equipment for preparing the cement micro-aggregate by utilizing the solid waste, and the equipment comprises a grinding mechanism, a multi-stage screening mechanism and an air blowing selection mechanism, wherein the multi-stage screening mechanism is arranged at the lower side of the grinding mechanism, and the air blowing selection mechanism is arranged at the lower side of the multi-stage screening mechanism;

the blast air selection mechanism comprises a first discharge barrel, an air blower, a second material receiving box, an inclined frame, a second discharge box, a second discharge barrel, a collecting branch chain and a fixing frame, wherein the first discharge barrel is of a cylindrical structure with an opening at the lower end, the first discharge barrel is arranged at the lower end of the multi-stage screening mechanism, an opening is formed in the upper end of the first discharge barrel, the air blower is arranged on the rear side of the first discharge barrel, the second material receiving box is arranged below the first discharge barrel, the inclined frame is arranged on the front side of the first discharge barrel, the second discharge box is arranged at the front end of the inclined frame, the second discharge box is gradually reduced from top to bottom, the second discharge barrel is arranged at the lower end of the second discharge barrel, the collecting branch chain is arranged on the second discharge barrel, and the fixing frame is arranged outside the first discharge barrel;

the collecting branch chain comprises a fixing ring, an electric push rod, a clamping ring and a filter bag, the lower end of the second discharging cylinder is fixedly connected with the first fixing ring, the electric push rod is symmetrically arranged on the outer wall of the second discharging cylinder on the upper side of the first fixing ring, the clamping ring is sleeved on the outer wall of the second discharging cylinder on the upper side of the first fixing ring in a sliding manner, the lower end of a telescopic rod of the electric push rod is connected with the clamping ring, and the mouth of the filter bag is clamped between the clamping ring and the first fixing ring;

when the equipment for preparing the cement micro-aggregate by adopting the solid waste is used for treating the solid waste, the method comprises the following steps:

s1, crushing solid waste: crushing the solid waste into smaller particles by external crushing equipment;

s2, grinding solid waste into powder: grinding the small granular solid waste into powder by a grinding mechanism;

s3, multi-stage screening: screening the solid waste powder through a multi-stage screening mechanism, and removing larger particles to obtain finer powder;

s4, air blowing selection: and further screening the powder by a blowing and selecting mechanism to further obtain finer solid waste powder.

As a preferred technical scheme of the invention, the grinding mechanism comprises a grinding barrel, a first guide barrel, a driving motor, a first grinding disc, a rotating shaft, a second grinding disc, a grinding cone, a matching block, a matching groove and a feed hopper, wherein the grinding barrel is of a cylindrical structure with an opening at the lower end, the first grinding disc is arranged in the grinding barrel, a abdicating hole is formed in the center of the first grinding disc, the first guide barrel is arranged on the inner wall of the grinding barrel at the upper side of the first grinding disc, the driving motor is arranged at the upper end of the grinding barrel, an output shaft of the driving motor penetrates through the upper side wall of the grinding barrel and is provided with the rotating shaft, the rotating shaft penetrates through the abdicating hole, the second grinding disc is arranged at the lower end of the rotating shaft, the grinding cone is arranged at the lower end of the second grinding disc, the matching block is arranged at the position of the inner wall of the grinding barrel corresponding to the grinding cone, the matching groove matched with the grinding cone is formed in the middle of the matching block, and the matching groove enables the upper end and the lower end of the matching block to be communicated, and the upper end of the crushing barrel is provided with a feed hopper.

As a preferred technical scheme of the invention, the first guide cylinder is of a circular truncated cone structure with the upper end and the lower end communicated, and the diameter of the upper end of the first guide cylinder is larger than that of the lower end of the first guide cylinder.

According to a preferred technical scheme, the upper end of the second polishing disc is uniformly provided with extrusion protrusions along the circumferential direction, the lower end of the first polishing disc is provided with a telescopic groove, a jacking spring is uniformly arranged in the telescopic groove, an extrusion block is slidably arranged in the telescopic groove, and the upper end of the extrusion block is connected with the lower end of the jacking spring.

As a preferred technical scheme of the invention, the multi-stage screening mechanism comprises a fixed plate, a first mounting plate, screening frames, driving branched chains, reciprocating chutes, reciprocating sliders, baffles and a discharge chute, wherein the fixed plate is arranged at the lower end of the grinding mechanism, a through hole is formed in the middle of the fixed plate, the first mounting plate is symmetrically arranged at the lower end of the fixed plate in a front-back manner, the screening frames are arranged between the first mounting plates from top to bottom, the screening frames are obliquely arranged, the inclination directions of two adjacent screening frames are opposite, the lower sides of the screening frames are rotatably connected between the first mounting plates, the reciprocating chutes are formed in the first mounting plate close to the upper side of the screening frames, the reciprocating sliders are slidably arranged in the reciprocating chutes, the reciprocating sliders are connected to the side wall close to the upper ends of the screening frames, the driving branched chains are arranged on the upper sides of the first mounting plates, and the driving branched chains are connected with the reciprocating sliders, the baffle sets up both ends about mounting panel, and the position that the baffle corresponds screening frame lower extreme has seted up the blown down tank.

As a preferred technical scheme, the connecting frames are obliquely arranged on the outer sides of the discharge chutes, the connecting frames positioned on the same side are connected to the side wall of the first discharge box, the first discharge box is of a box-shaped structure with an opening at the lower end, the first material receiving box is arranged below the first discharge box, and the connecting frames are rectangular frames.

As a preferred technical scheme of the invention, the driving branched chain comprises rotating motors, driving shafts, cams, fixed blocks, sliding rods, reciprocating springs and idler wheels, the driving shafts are symmetrically and rotatably arranged on the upper sides between the first mounting plates, the rotating motors are symmetrically arranged on the first mounting plate on the rear side, output shafts of the two rotating motors are connected with the corresponding driving shafts, the cams are arranged at the front ends of the driving shafts, the fixed blocks are arranged on the side walls of the first mounting plates below the cams, the sliding rods are slidably arranged on the fixed blocks, the idler wheels are arranged at the upper ends of the sliding rods, the reciprocating springs are sleeved on the sliding rods between the idler wheels and the fixed blocks, the idler wheels are in rolling contact with the outer walls of the cams, and the sliding rods are connected with the reciprocating slide blocks on the same side.

As a preferred technical scheme of the invention, the gap between the grinding cone and the matching groove is gradually reduced from top to bottom.

The invention has the beneficial effects that:

1. the multi-stage screening mechanism is used for primarily screening, and the blowing and selecting mechanism is used for selectively collecting the relatively fine solid waste powder, wherein the blowing and selecting mechanism is used for selectively collecting the relatively light solid waste powder by using wind power, and the principle that the smaller the volume of the solid waste powder is, the lighter the solid waste powder is utilized, so that the relatively fine solid waste powder can be obtained, and the grinding effect of the solid waste is greatly improved.

2. The grinding mechanism designed by the invention can fully grind the solid waste by a mode of rolling twice, thereby improving the grinding effect of the equipment.

3. When solid waste particles are kneaded and crushed between the first grinding disc and the second grinding disc in the working process, the upper end of the second grinding disc extrudes the protrusion to push against the extrusion block in a reciprocating mode, the extrusion block is made to stretch in a reciprocating mode in the telescopic groove under the pushing action of the jacking spring, the protrusion is extruded and pushed against the extrusion block in a reciprocating mode through the upper end of the second grinding disc, meanwhile, the solid waste particles can be extruded and kneaded, and therefore the grinding effect of the solid waste particles can be improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of the blower concentration mechanism of the present invention;

FIG. 4 is a top view of the blower selection mechanism of the present invention;

FIG. 5 is a sectional view taken along line A-A of FIG. 4 in accordance with the present invention;

FIG. 6 is a top view of the present invention;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6 in accordance with the present invention;

FIG. 8 is an enlarged view of a portion of the invention at C of FIG. 2;

FIG. 9 is an enlarged view of a portion of the invention at D of FIG. 2;

FIG. 10 is an enlarged view of the invention at E of FIG. 7;

fig. 11 is a schematic view showing the construction of a second sanding disc and a pressing protrusion according to the present invention.

In the figure: 1. a milling mechanism; 2. a multi-stage screening mechanism; 3. a blowing and selecting mechanism; 11. a milling drum; 12. a first guide cylinder; 13. a drive motor; 14. polishing a disc I; 15. a rotating shaft; 16. a second polishing disc; 17. polishing a cone; 18. a matching block; 19. a mating groove; 110. a feed hopper; 161. extruding the protrusion; 141. a telescopic groove; 142. a jack-out spring; 143. extruding the block; 21. a fixing plate; 22. a first mounting plate; 23. screening the frame; 24. a drive branch; 25. a reciprocating chute; 26. a reciprocating slide block; 27. a baffle plate; 28. a discharge chute; 241. a rotating electric machine; 242. a drive shaft; 243. a cam; 244. a fixed block; 245. a slide bar; 246. a reciprocating spring; 247. a roller; 281. a connecting frame; 282. a first discharging box; 31. a first discharging barrel; 32. a blower; 34. a material receiving box II; 35. an inclined frame; 36. a second discharging box; 37. a second discharging barrel; 38. collecting branched chains; 39. a fixed mount; 381. a fixing ring; 382. an electric push rod; 383. a clamping ring; 384. and (4) a filter bag.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 2, a method for preparing cement micro-aggregates by using solid wastes uses a device for preparing cement micro-aggregates by using solid wastes, the device comprises a grinding mechanism 1, a multi-stage screening mechanism 2 and an air blowing and selecting mechanism 3, the multi-stage screening mechanism 2 is arranged at the lower side of the grinding mechanism 1, and the air blowing and selecting mechanism 3 is arranged at the lower side of the multi-stage screening mechanism 2.

Referring to fig. 7 and 10, the milling mechanism 1 includes a milling barrel 11, a first guiding barrel 12, a driving motor 13, a first polishing disc 14, a rotating shaft 15, a second polishing disc 16, a polishing cone 17, a matching block 18, a matching groove 19 and a feeding hopper 110, the milling barrel 11 is a cylindrical structure with an opening at the lower end, the milling barrel 11 is internally provided with the first polishing disc 14, the center of the first polishing disc 14 is provided with a yielding hole, the first guiding barrel 12 is arranged on the inner wall of the milling barrel 11 at the upper side of the first polishing disc 14, the driving motor 13 is arranged at the upper end of the milling barrel 11, an output shaft of the driving motor 13 penetrates through the upper side wall of the milling barrel 11 and is provided with the rotating shaft 15, the rotating shaft 15 penetrates through the yielding hole, the lower end of the rotating shaft 15 is provided with the second polishing disc 16, the lower end of the second polishing disc 16 is provided with the polishing cone 17, the matching block 18 is arranged at the position corresponding to the inner wall of the polishing cone 17 of the milling barrel 11, cooperation piece 18 middle part seted up with 17 complex cooperation grooves 19 of polishing cone, and cooperation grooves 19 make cooperation piece 18 about both ends communicate, crushing barrel 11 upper end is provided with feeder hopper 110, the gap between polishing cone 17 and the cooperation grooves 19 reduces from last to down gradually.

The first guide cylinder 12 is of a circular truncated cone structure with the upper end and the lower end communicated, and the diameter of the upper end of the first guide cylinder 12 is larger than that of the lower end of the first guide cylinder 12.

During specific work, the solid waste is crushed into smaller particles through external crushing equipment, the driving motor 13 works, the output shaft of the driving motor 13 rotates to drive the rotating shaft 15 to rotate, the rotating shaft 15 drives the second grinding disc 16 to rotate, meanwhile, the grinding cone 17 rotates along with the second grinding disc 16, the solid waste crushed into smaller particles is poured into the feeding hopper 110, the solid waste enters the abdicating hole through the guiding function of the first guiding cylinder 12, the solid waste in the abdicating hole falls to the middle part of the upper end of the second grinding disc 16, the solid waste at the upper end is thrown around when the second grinding disc 16 rotates, the solid waste enters the first grinding disc 14 and the second grinding disc 16 to be kneaded and crushed, the kneaded and crushed solid waste particles fall between the grinding cone 17 and the matching groove 19 from the edge of the second grinding disc 16 to be kneaded and crushed again, because the gap between the grinding cone 17 and the matching groove 19 is gradually reduced from top to bottom, the solid waste particles are gradually ground to be finer and finer, and the crushed solid waste is powdery and falls into the grading mechanism 2 from the lower end of the matching groove 19.

Referring to fig. 10 and 11, the upper end of the second polishing disc 16 is uniformly provided with an extrusion protrusion 161 along the circumferential direction thereof, the lower end of the first polishing disc 14 is provided with a telescopic groove 141, a jacking spring 142 is uniformly arranged in the telescopic groove 141, an extrusion block 143 is slidably arranged in the telescopic groove 141, and the upper end of the extrusion block 143 is connected with the lower end of the jacking spring 142.

When the solid waste particles are kneaded and crushed between the first polishing disc 14 and the second polishing disc 16, the extrusion protrusion 161 at the upper end of the second polishing disc 16 pushes the extrusion block 143 in a reciprocating manner, the extrusion block 143 stretches out and draws back in a stretching difference under the pushing action of the pushing spring 142, and the extrusion block 143 can extrude and knead the solid waste particles through the extrusion protrusion 161 at the upper end of the second polishing disc 16 pushing up and drawing back in a reciprocating manner, so that the grinding effect of the solid waste particles can be improved.

Referring to fig. 6, 7 and 9, the multi-stage sieving mechanism 2 includes a fixed plate 21, a first mounting plate 22, sieving frames 23, a driving branch chain 24, a reciprocating chute 25, a reciprocating slider 26, a baffle 27 and a discharge chute 28, the fixed plate 21 is disposed at the lower end of the pulverizing mechanism 1, a through hole is disposed at the middle portion of the fixed plate 21, the first mounting plate 22 is symmetrically disposed at the lower end of the fixed plate 21, the sieving frames 23 are disposed between the first mounting plates 22 from top to bottom, the sieving frames 23 are obliquely disposed, the inclination directions of two adjacent sieving frames 23 are opposite, the lower side of the sieving frame 23 is rotatably connected between the first mounting plates 22, the reciprocating chute 25 is disposed on the first mounting plate 22 near the upper side of the sieving frame 23, the reciprocating slider 26 is slidably disposed in the reciprocating chute 25, the reciprocating slider 26 is connected to the side wall near the upper end of the sieving frame 23, the driving branched chain 24 is arranged on the upper side of the first mounting plate 22, the driving branched chain 24 is connected with the reciprocating slide block 26, the baffle plates 27 are arranged at the left end and the right end of the first mounting plate 22, and the positions of the baffle plates 27 corresponding to the lower end of the screening frame 23 are provided with discharge chutes 28;

the spout 28 outside slope is provided with the connection frame 281, and the connection frame 281 that lies in same one side all connects on the lateral wall of a play workbin 282, and a play workbin 282 is lower extreme open-ended box structure, and the below of a play workbin 282 is provided with the case 283 that connects No. one, and connection frame 281 is the rectangle frame, and connection frame 281 can reduce the raise dust.

During specific work, drive branch chain 24 through and drive the shake of screening frame 23, it falls to the screening frame 23 of the most upside to be pulverous solid waste, the screening frame 23 of shake sieves pulverous solid waste from last to screening step by step down, the great solid waste of granule rolls to the screening frame 23 lower extreme and falls to connecting frame 281, solid waste in connecting frame 281 rolls to a ejection of compact case 282, solid waste falls to a material receiving box 283 from the lower extreme of a ejection of compact case 282 and collects, the great solid waste of granule of collection pours into feeder hopper 110 again and smashes once more, the powder of screening out gets into in the choice mechanism 3 of blast air.

Referring to fig. 8 and 9, the driving branched chain 24 includes rotating motors 241, driving shafts 242, cams 243, fixing blocks 244, sliding rods 245, reciprocating springs 246 and rollers 247, the driving shafts 242 are symmetrically and rotatably disposed on the upper sides of the first mounting plates 22, the rotating motors 241 are symmetrically disposed on the first mounting plate 22 on the rear side, output shafts of the two rotating motors 241 are connected with the corresponding driving shafts 242, the cams 243 are disposed at the front ends of the driving shafts 242, the fixing blocks 244 are disposed on the side walls of the first mounting plate 22 below the cams 243, the sliding rods 245 are slidably disposed on the fixing blocks 244, the rollers 247 are disposed at the upper ends of the sliding rods 245, the reciprocating springs 246 are sleeved on the sliding rods 245 between the rollers 247 and the fixing blocks 244, the rollers 247 are in rolling contact with the outer walls of the cams 243, and the sliding rods 245 are connected with the reciprocating sliders 26 on the same side.

During specific work, the rotating motor 241 works, the output shaft of the rotating motor 241 drives the driving shaft 242 to rotate, the cam 243 rotates along with the driving shaft 242 and pushes the roller 247, under the action of the reciprocating spring 246, the sliding rod 245 reciprocates up and down, the sliding rod 245 drives the reciprocating slide block 26 to slide up and down in the reciprocating slide groove 25 in a reciprocating mode, and therefore the reciprocating slide block 26 drives the screening frame 23 to shake, and screening efficiency of the screening frame 23 is improved.

Referring to fig. 3, 4 and 5, the blowing and selecting mechanism 3 includes a first discharging cylinder 31, a blower 32, a second receiving box 34, an inclined frame 35, a second discharging box 36, a second discharging cylinder 37, a collecting branch 38 and a fixing frame 39, no. one go out feed cylinder 31 and be lower extreme open-ended tubular structure, No. one go out feed cylinder 31 and set up at 2 lower extremes of multistage screening mechanism, No. one go out feed cylinder 31 upper end and be equipped with the opening, air-blower 32 sets up the rear side at a feed cylinder 31, No. two connect workbin 34 to set up the below at a feed cylinder 31, slope frame 35 sets up the front side at a feed cylinder 31, No. two go out feed cylinder 36 and set up the front end at slope frame 35, No. two go out feed cylinder 36 from last to reducing gradually down, No. two the lower extreme of feed cylinder 36 is provided with No. two and goes out feed cylinder 37, be provided with collection branch 38 on No. two go out feed cylinder 37, No. one go out the feed cylinder 31 outside and be provided with mount 39.

During specific work, the solid waste crushed into powder again falls downwards, the air blower 32 works, the air blower 32 blows air to the rear end of the inclined frame 35 transversely, the air blower 32 blows air to the rear end of the inclined frame 35 in the falling process of the solid waste crushed into powder, smaller and light powder in the solid waste crushed into powder is blown to the inclined frame 35, heavier particles in the powder are not blown to continuously fall into the second material receiving box 34, the solid waste in the second material receiving box 34 is poured into the feed hopper 110 again, the powder blown to the inclined frame 35 enters the collecting branch chain 38 through the second material discharging box 36 to be collected, the powder is gradually reduced due to wind power when the powder is in the inclined frame 35, larger powder particles mixed in the powder roll downwards due to self gravity, and the fineness of the powder entering the collecting branch chain 38 is further guaranteed.

Referring to fig. 5, the collecting branched chain 38 includes a fixing ring 381, an electric push rod 382, a clamping ring 383 and a filter bag 384, the first fixing ring 381 is fixedly connected to the lower end of the second discharging cylinder 37, the electric push rod 382 is symmetrically arranged on the outer wall of the second discharging cylinder 37 on the upper side of the first fixing ring 381, the clamping ring 383 is slidably sleeved on the outer wall of the second discharging cylinder 37 on the upper side of the first fixing ring 381, the lower end of a telescopic rod of the electric push rod 382 is connected with the clamping ring 383, and a bag opening of the filter bag 384 is clamped between the clamping ring 383 and the first fixing ring 381.

When the dust filter bag is in specific work, the bag opening of the filter bag 384 is sleeved between the fixing ring 381 and the clamping ring 383, the electric push rod 382 works, the telescopic rod of the electric push rod 382 extends to drive the clamping ring 383 to clamp the bag opening of the filter bag 384 between the fixing ring 381 and the clamping ring 383 so as to prevent the filter bag 384 from falling off, fine solid waste powder is blown into the filter bag 384 by the blower 32, the filter bag 384 is air-permeable, the filter bag 384 filters the solid waste powder in the filter bag 384, blown air can be discharged, and therefore the solid waste powder is collected by the filter bag 384.

s2, grinding solid waste into powder: crushing solid waste into smaller particles through external crushing equipment, driving motor 13 works, an output shaft of driving motor 13 rotates to drive a rotating shaft 15 to rotate, rotating shaft 15 drives a second grinding disc 16 to rotate, meanwhile, a grinding cone 17 rotates along with the second grinding disc 16, the solid waste crushed into smaller particles is poured from a feed hopper 110, the solid waste enters a yielding hole through the guiding effect of a guide cylinder 12, the solid waste in the yielding hole falls to the middle of the upper end of the second grinding disc 16, the solid waste at the upper end is thrown around when the second grinding disc 16 rotates, the solid waste enters between the first grinding disc 14 and the second grinding disc 16 to be kneaded and crushed, the kneaded and crushed solid waste particles fall between the grinding cone 17 and a matching groove 19 from the edge of the second grinding disc 16 to be kneaded and crushed again, and the gaps between the grinding cone 17 and the matching groove 19 are gradually reduced from top to bottom, so that the solid waste particles gradually fall into smaller particles The solid waste after being crushed is powdery and falls into the multi-stage screening mechanism 2 from the lower end of the matching groove 19;

s3, multi-stage screening: the screening frame 23 is driven to shake by the driving branched chain 24, the powdery solid waste falls into the uppermost screening frame 23, the powdery solid waste is screened step by the shaken screening frame 23 from top to bottom, the solid waste with larger particles falls into the connecting frame 281 from the lower end of the screening frame 23, the solid waste in the connecting frame 281 falls into the first discharging box 282, the solid waste falls into the first receiving box 283 from the lower end of the first discharging box 282 to be collected, the collected solid waste with larger particles is poured into the feeding hopper 110 again to be crushed again, and the screened powder enters the air blowing fine selection mechanism 3;

s4, air blowing selection: the solid waste crushed into powder again falls downwards, the blower 32 works, the blower 32 blows air to the rear end of the inclined frame 35 transversely, the solid waste crushed into powder passes through the blower 32 in the falling process, so that the smaller and lighter powder in the solid waste crushed into powder is blown to the inclined frame 35, the larger and heavier particles in the powder are not blown to continuously fall into the second material receiving box 34, the powder blown to the inclined frame 35 enters the collecting branched chain 38 through the second material discharging box 36 along the inclined frame 35 for collection, the larger powder particles mixed in the powder roll downwards due to the self gravity when the powder is in the inclined frame 35 due to the gradual reduction of wind power, the fineness of the powder entering the collecting branched chain 38 is further ensured, the bag mouth of the filter bag 384 is sleeved between the fixing ring 381 and the clamping ring 383, the electric push rod 382 works, and the telescopic rod of the electric push rod stretches out to drive the 383 to clamp the bag mouth 384 between the fixing ring 381 and the clamping ring 383 Between the tightening rings 383, the filter bag 384 is prevented from falling off, relatively fine solid waste powder is blown into the filter bag 384 by the blower 32, the filter bag 384 has air permeability, so that the solid waste powder of the filter bag 384 is filtered in the filter bag 384, the blown air can be discharged, and the solid waste powder is collected by the filter bag 384.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A method for preparing cement micro-aggregate by utilizing solid waste uses a device for preparing cement micro-aggregate by utilizing solid waste, and the device comprises a grinding mechanism (1), a multi-stage screening mechanism (2) and a blast air selection mechanism (3), and is characterized in that: a multi-stage screening mechanism (2) is arranged on the lower side of the powder grinding mechanism (1), and a blast air selection mechanism (3) is arranged on the lower side of the multi-stage screening mechanism (2);

the blowing selection mechanism (3) comprises a first discharge barrel (31), an air blower (32), a second material receiving box (34), a tilting frame (35), a second discharge box (36), a second discharge barrel (37), a collecting branched chain (38) and a fixing frame (39), wherein the first discharge barrel (31) is of a cylindrical structure with an opening at the lower end, the first discharge barrel (31) is arranged at the lower end of the multistage screening mechanism (2), an opening is arranged at the upper end of the first discharge barrel (31), the air blower (32) is arranged at the rear side of the first discharge barrel (31), the second material receiving box (34) is arranged below the first discharge barrel (31), the tilting frame (35) is arranged at the front side of the first discharge barrel (31), the second discharge box (36) is arranged at the front end of the tilting frame (35), the second discharge box (36) is gradually reduced from top to bottom, the lower end of the second discharge box (36) is provided with the second discharge barrel (37), a collecting branch chain (38) is arranged on the second discharging barrel (37), and a fixing frame (39) is arranged on the outer side of the first discharging barrel (31);

the collecting branch chain (38) comprises a fixing ring (381), an electric push rod (382), a clamping ring (383) and a filter bag (384), the lower end of the second discharging cylinder (37) is fixedly connected with the first fixing ring (381), the electric push rod (382) is symmetrically arranged on the outer wall of the second discharging cylinder (37) on the upper side of the first fixing ring (381), the clamping ring (383) is slidably sleeved on the outer wall of the second discharging cylinder (37) on the upper side of the first fixing ring (381), the lower end of a telescopic rod of the electric push rod (382) is connected with the clamping ring (383), and the bag mouth of the filter bag (384) is clamped between the clamping ring (383) and the first fixing ring (381);

s2, grinding solid waste into powder: grinding the small granular solid waste into powder by a grinding mechanism (1);

s3, multi-stage screening: screening the solid waste powder through a multi-stage screening mechanism (2), and removing larger particles to obtain finer powder;

s4, air blowing selection: the powder is further screened by the blast selection mechanism (3), and the finer solid waste powder is further obtained.

2. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 1, wherein the method comprises the following steps: the milling mechanism (1) comprises a grinding barrel (11), a first guide cylinder (12), a driving motor (13), a first milling disc (14), a rotating shaft (15), a second milling disc (16), a milling cone (17), a matching block (18), a matching groove (19) and a feed hopper (110), wherein the grinding barrel (11) is of a cylindrical structure with an opening at the lower end, the first milling disc (14) is arranged in the grinding barrel (11), a yielding hole is formed in the center of the first milling disc (14), the first guide cylinder (12) is arranged on the inner wall of the grinding barrel (11) at the upper side of the first milling disc (14), the driving motor (13) is arranged at the upper end of the grinding barrel (11), an output shaft of the driving motor (13) penetrates through the upper side wall of the grinding barrel (11) and is provided with the rotating shaft (15), the rotating shaft (15) penetrates through the yielding hole, the lower end of the rotating shaft (15) is provided with the second milling disc (16), no. two make mill (16) lower extreme be provided with the cone (17) of polishing, be provided with cooperation piece (18) on the position that crushing barrel (11) inner wall and cone (17) of polishing correspond, cooperation piece (18) middle part seted up with cone (17) complex cooperation groove (19) polish, and cooperation groove (19) make cooperation piece (18) both ends intercommunication from top to bottom, crushing barrel (11) upper end is provided with feeder hopper (110).

3. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 2, wherein the method comprises the following steps: the first guide cylinder (12) is of a circular truncated cone structure with the upper end and the lower end communicated, and the diameter of the upper end of the first guide cylinder (12) is larger than that of the lower end of the first guide cylinder (12).

4. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 2, wherein the method comprises the following steps: extrusion protrusions (161) are uniformly arranged at the upper end of the second polishing disc (16) along the circumferential direction of the second polishing disc, a telescopic groove (141) is formed in the lower end of the first polishing disc (14), a top extension spring (142) is uniformly arranged in the telescopic groove (141), an extrusion block (143) is slidably arranged in the telescopic groove (141), and the upper end of the extrusion block (143) is connected with the lower end of the top extension spring (142).

5. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 1, wherein the method comprises the following steps: the multistage screening mechanism (2) comprises a fixing plate (21), a first mounting plate (22), screening frames (23), a driving branched chain (24), a reciprocating chute (25), a reciprocating slide block (26), a baffle plate (27) and a discharge chute (28), wherein the fixing plate (21) is arranged at the lower end of the grinding mechanism (1), a through hole is formed in the middle of the fixing plate (21), the first mounting plate (22) is symmetrically arranged at the lower end of the fixing plate (21) from front to back, the screening frames (23) are provided with a plurality of screening frames (23) which are sequentially arranged between the first mounting plates (22) from top to bottom, the screening frames (23) are obliquely arranged, the inclination directions of two adjacent screening frames (23) are opposite, the lower sides of the screening frames (23) are rotatably connected between the first mounting plates (22), the reciprocating chute (25) is formed in the first mounting plate (22) close to the upper side of the screening frames (23), reciprocating slide block (26) slide to set up in reciprocal spout (25), reciprocating slide block (26) are connected on being close to the lateral wall of screening frame (23) upper end, and drive branched chain (24) set up mounting panel (22) upside No. one, and drive branched chain (24) are connected with reciprocating slide block (26), and baffle (27) set up both ends about mounting panel (22), and discharge chute (28) have been seted up to baffle (27) corresponding the position of screening frame (23) lower extreme.

6. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 5, wherein the method comprises the following steps: the outer side of the discharging groove (28) is obliquely provided with a connecting frame (281), the connecting frame (281) positioned on the same side is connected to the side wall of a discharging box (282), the discharging box (282) is of a box type structure with an opening at the lower end, a material receiving box (283) is arranged below the discharging box (282), and the connecting frame (281) is a rectangular frame.

7. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 5, wherein the method comprises the following steps: the driving branched chain (24) comprises rotating motors (241), driving shafts (242), cams (243), fixed blocks (244), sliding rods (245), reciprocating springs (246) and rollers (247), the driving shafts (242) are symmetrically and rotatably arranged on the upper sides between the first mounting plates (22), the rotating motors (241) are symmetrically arranged on the first mounting plate (22) on the rear side, output shafts of the two rotating motors (241) are connected with the corresponding driving shafts (242), the cams (243) are arranged at the front ends of the driving shafts (242), the fixed blocks (244) are arranged on the side wall of the first mounting plate (22) below the cams (243), the sliding rods (245) are slidably arranged on the fixed blocks (244), the rollers (247) are arranged at the upper ends of the sliding rods (245), and the reciprocating springs (246) are sleeved on the sliding rods (245) between the rollers (247) and the fixed blocks (244), the roller (247) is in rolling contact with the outer wall of the cam (243), and the sliding rod (245) is connected with the reciprocating slide block (26) on the same side.

8. The method for preparing the cement micro-aggregate by using the solid waste as claimed in claim 2, wherein the method comprises the following steps: the gap between the grinding cone (17) and the matching groove (19) is gradually reduced from top to bottom.