CN115301385A - Pulverized coal manufacturing equipment for laterite-nickel ore rotary kiln - Google Patents

Abstract

The invention relates to the technical field of nickel ore pulverized coal manufacturing equipment, and particularly provides pulverized coal manufacturing equipment for a rotary kiln for laterite-nickel ore, which comprises an extrusion coarse grinding device, a fine grinding device and a cooling heat dissipation device, wherein the fine grinding device comprises a circular grinding groove for grinding and sieving pulverized coal, a grinding driving mechanism fixedly assembled on the circular grinding groove and a grinding mechanism rotatably arranged in the circular grinding groove; the equipment provided by the invention actively carries out cooling and heat dissipation treatment on the local processing environment of the equipment, thereby avoiding heat concentration and temperature rise, further effectively controlling the environment temperature below the ignition temperature of the pulverized coal, avoiding the occurrence of burning explosion danger, and improving the safety of the equipment in the processing process.

Description

Laterite-nickel ore deposit buggy preparation equipment for rotary kiln

Technical Field

The invention relates to the technical field of nickel ore pulverized coal manufacturing equipment, and particularly provides pulverized coal manufacturing equipment for a laterite-nickel ore rotary kiln.

Background

In the process of refining the laterite-nickel ore, coal dust needs to participate in a rotary kiln, the coal dust is generally formed by crushing and processing bituminous coal briquettes, the crushing of the coal briquettes needs to be completed by crushing and processing equipment, and the risk of dust explosion exists in the crushing and processing process. The dust explosion in the working cavity of the crushing equipment is different from the explosion of the external environment of the equipment, and has the characteristics of high concentration, quick temperature rise, easy ignition and the like. The crushing equipment is used for crushing in the working cavity, the space is small, and a large amount of dust can be raised to gather in the small space under the action of mechanical force, so that the suspended dust in the equipment is easy to be in the range of explosive concentration. The equipment can collide, extrude and mill the materials through various forces in the crushing process, so that ignition sources such as friction, impact sparks, static electricity and the like are easily generated in the crushing cavity during the operation of the equipment, and dust explosion is caused. In addition, the pulverized coal is combustible, and the explosion-proof safety during the pulverized coal manufacturing process needs to be considered.

For the above, the existing related pulverized coal pulverizing equipment has the following problems that on one hand, the existing pulverizing equipment has few effective explosion-proof structures designed to reduce the possibility of dust explosion in the inner cavity of the equipment, and on the other hand, the existing pulverizing equipment generally directly pulverizes coal blocks in one step, the pulverizing time is long, the pulverized particles are large, and further screening processing is often needed.

Disclosure of Invention

In order to solve the problems, the invention provides a coal powder manufacturing device for a rotary kiln of laterite-nickel ore, which is used for solving the problems in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme to achieve the purpose: a pulverized coal manufacturing device for a rotary kiln for laterite-nickel ore comprises an extrusion coarse grinding device, a fine grinding device and a cooling heat dissipation device.

The fine grinding device comprises a circular grinding groove, a fixed assembly and a grinding driving mechanism, wherein the circular grinding groove is used for grinding and sieving coal powder, the grinding driving mechanism is arranged on the circular grinding groove, the grinding driving mechanism is rotationally arranged in the circular grinding groove, and the grinding driving mechanism drives the grinding mechanism to rotationally grind in the circular grinding groove.

The extrusion coarse grinding device comprises a fixed grinding disc fixed in the inner ring area of the circular grinding groove and a rotary grinding disc vertically and rotatably arranged right above the fixed grinding disc; the fixed grinding disc is in a circular truncated cone shell shape; the ring rolls the groove center pin fixed roll dish center pin and rotatory roll dish rotation center axle triaxial coincidence.

The cooling and heat dissipation device is vertically and rotatably arranged and vertically and upwards penetrates through the circular ring rolling groove, the fixed rolling disc and the rotary rolling disc in sequence along the central shaft of the circular ring rolling groove; when the cooling and heat-dissipating device rotates, the cooling and heat-dissipating device dissipates heat and cools the shell of the fixed rolling disc.

Preferably, the rotary rolling disc comprises an outer cover shell, and the outer cover shell comprises a feed hopper and a rolling disc housing from top to bottom; a material guiding cylinder is coaxially and fixedly installed at the top end of the fixed grinding disc and penetrates through the outer cover shell upwards; and a plurality of lining grinding plate assemblies which are uniformly distributed around the central shaft of the grinding plate housing are assembled in the grinding plate housing.

Preferably, the inner liner mill plate assembly comprises a fan-plate shaped inner liner mill plate; a material guide ring is arranged in the outer cover shell and fixed on the inner wall of the feed hopper, the upper end part of the inner lining grinding plate extends into an area space between the material guide ring and the grinding disc housing, a guide groove is formed in the top end of the inner lining grinding plate downwards, a sliding block hinge joint is arranged in the guide groove in a matched and sliding mode, a top contact rod is hinged to the sliding block hinge joint, and the top contact rod is horizontally arranged on the material guide ring in a sliding mode along the radial direction of the feed hopper; the inner lining grinding plate is hinged with the inner wall end of the grinding disc housing, and a plurality of reset springs are fixedly connected between the inner lining grinding plate and the inner wall of the grinding disc housing; the guide cylinder is sleeved and fixed with a guide ring, the outer side wall of the guide ring is formed by a plurality of groove surfaces and a plurality of convex surfaces which are distributed alternately, the groove surfaces and the convex surfaces are in smooth transition, and the top contact rod is in contact with the outer side wall of the guide ring.

Preferably, the cooling and heat dissipating device comprises a vertically rotating circular tube, and the circular tube sequentially penetrates through the circular ring rolling groove, the fixed rolling disc and the rotary rolling disc upwards; a plurality of bending branch pipes are uniformly distributed and fixedly connected on the circumference of the circular pipe, the bending branch pipes are positioned in an inner cavity of the fixed rolling disc shell, each bending branch pipe comprises an inclined pipe section and a horizontal pipe section, the inclined pipe section is communicated with the horizontal pipe section in a bending mode, the inclination of the inclined pipe section is the same as that of a circular table top of the fixed rolling disc, and a part, positioned between a conduction opening of the inclined pipe section and a conduction opening of the horizontal pipe section, in the circular pipe is of a closed disconnection structure; the inclined pipe section is fixedly provided with a flabellate-shaped adherence heat-conducting plate, and the adherence heat-conducting plate is contacted with the inner wall of the fixed grinding disc shell.

Preferably, the horizontal pipe section is fixedly provided with a wind plate, and a plurality of heat dissipation holes are uniformly distributed in the circumference of the area between the material guide cylinder and the circular pipe at the top end of the fixed grinding disc.

Preferably, the bottom surface of the circular grinding groove is a grid groove, and a fine grinding filter screen is attached and fixed in the grid groove.

Preferably, the mechanism of milling includes and installs through the vertical rotation of bearing annular on the outer loop inner wall of ring rolling groove mills the frame, the annular mills to go up fixed mounting has a plurality of rolling frames, the rolling frame is gone up the level and is rotated and install the grinding wheel, the grinding wheel with thin filter screen rolling contact.

Preferably, the annular mill on the frame still fixed mounting with grind the same and even alternate distribution's each other scraper frame of wheel carrier quantity, scrape two scrapers of relative fixedly connected with on the scraper frame, the scraper is circular-arcly, just scraper one side with carefully grind filter screen homonymy edge contact, just the scraper lower limb with carefully grind filter screen filtering surface contact.

Preferably, a plurality of grinding teeth are uniformly distributed on the surface of the inner lining grinding plate facing the fixed grinding disc.

The technical scheme has the following advantages or beneficial effects: 1. the invention provides a pulverized coal manufacturing device for a laterite-nickel ore rotary kiln, which is characterized in that on the premise that the dust suspension concentration in the crushing process of an inner cavity of the device cannot be effectively changed and the problem of electrostatic fire source caused by the action of mechanical force cannot be solved, a cooling and heat dissipation device is arranged in a matched manner, and the local processing environment of the device is actively cooled and dissipated, so that the heat concentration and the temperature rise are avoided, the environment temperature is effectively controlled below the ignition temperature of pulverized coal, the occurrence of burning explosion danger is avoided, and the safety in the processing process of the device is improved.

2. The invention provides a pulverized coal manufacturing device for a rotary kiln of laterite-nickel ore, which is provided with an extrusion coarse grinding device, can effectively and primarily grind coal blocks into coal slag, further grind and crush the coal slag through an arranged fine grinding device, and synchronously screen and filter through a fine grinding filter screen in a circular grinding groove, thereby effectively and rapidly completing the crushing processing of pulverized coal with required particle size in a step-by-step crushing mode.

Drawings

The invention and its features, aspects and advantages will become more apparent from the following detailed description of non-limiting embodiments, which is to be read in connection with the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not intended to be drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic three-dimensional structure diagram of coal powder manufacturing equipment for a rotary kiln for laterite-nickel ore.

Fig. 2 is a schematic view of a partial cross-sectional three-dimensional structure of coal powder manufacturing equipment for a rotary kiln for laterite-nickel ore.

Fig. 3 is a schematic perspective structure diagram of a part of a coal powder manufacturing device for a laterite-nickel ore rotary kiln provided by the invention.

Fig. 4 is a top view of the pulverized coal manufacturing equipment for the rotary kiln of the laterite-nickel ore.

Fig. 5 isbase:Sub>A cross-sectional view atbase:Sub>A-base:Sub>A in fig. 4.

Fig. 6 is a sectional view at B-B in fig. 4.

Fig. 7 is a partially enlarged schematic view at C in fig. 5.

Fig. 8 is a partially enlarged schematic view of fig. 6 at D.

Fig. 9 is a perspective view of a rotary milling disc.

Fig. 10 is a partially cut-away perspective view of a rotary milling disc.

Fig. 11 is a partially enlarged schematic view at E in fig. 10.

In the figure: 1. an extrusion coarse grinding device; 11. fixing a grinding disc; 111. a material guiding cylinder; 112. heat dissipation holes; 12. rotating the mill base; 121. an outer cover housing; 1211. a feed hopper; 1222. a grinding disc housing; 1223. a material guiding ring; 1224. a hopper pulley; 122. a liner grind plate assembly; 123. lining grinding plates; 1231. a guide groove; 1232. grinding the teeth; 124. a slider hinge; 125. a top feeler lever; 126. a return spring; 127. a guide ring; 13. a rotating support frame; 2. a fine grinding device; 21. grinding the groove by using a circular ring; 211. a grating groove; 212. finely grinding the filter screen; 213. a ring; 22. a grinding driving mechanism; 221. a drive motor; 2211. a drive gear; 222. a ring gear; 23. a milling mechanism; 231. an annular grinding frame; 232. a wheel frame; 233. grinding the wheel; 234. a doctor holder; 235. a scraper; 3. a cooling heat sink; 31. a circular tube; 311. a circular tube pulley; 312. a pipe joint; 32. bending the branch pipe; 321. an inclined tube section; 322. a horizontal pipe section; 33. a wind plate; 34. adhering to the wall to the heat conducting plate; 4. a blanking guide bin; 41. an inner bin body; 42. an outer bin body; 43. series connected support plates.

Detailed Description

The following detailed description of the embodiments of the present invention is provided to help those skilled in the art to more fully, accurately and deeply understand the conception and the technical solution of the present invention, and to assist the implementation thereof, by referring to the accompanying drawings and the description of the embodiments, but not to limit the present invention.

As shown in fig. 1, a pulverized coal manufacturing device for a rotary kiln for laterite-nickel ore comprises an extrusion coarse grinding device 1, a fine grinding device 2 and a cooling heat dissipation device 3.

As shown in fig. 3, 4, 5, 6, 7, 9, 10 and 11, the squeeze roughing device 1 includes a fixed mill 11 and a rotating mill 12 vertically and rotatably disposed right above the fixed mill 11; the fixed grinding disc 11 is in a circular truncated cone shell shape; the rotary milling disc 12 comprises a housing 121, the housing 121 comprises a feed hopper 1211 and a milling disc housing 1222 from top to bottom; a material guiding cylinder 111 is coaxially welded at the top end of the fixed roller 11, the material guiding cylinder 111 penetrates upwards from the outer cover shell 121, and the material guiding cylinder 111 mainly plays a role of separating material guiding, so that coal blocks are thrown into a region between the feed hopper 1211 and the material guiding cylinder 111; the mill housing 1222 is fitted with a preferred number of twelve liner mill assemblies 122 evenly distributed about its central axis. The lining grinding plate assembly 122 comprises a fan-plate-shaped lining grinding plate 123, seven grinding teeth 1232 are uniformly distributed on the plate surface of the lining grinding plate 123 facing the fixed grinding disc 11, and the seven grinding teeth 1232 are uniformly distributed on the lining grinding plate 123; a material guide ring 1223 is arranged in the outer cover shell 121, the material guide ring 1223 is fixed on the inner wall of the feed hopper 1211, the upper end part of the inner lining grinding plate 123 extends into a region space between the material guide ring 1223 and the mill cover 1222, the material guide ring 1223 mainly plays a role of guiding materials to prevent the thrown coal briquette materials from entering into the space between the inner lining grinding plate 123 and the mill cover 1222, the material guide ring 1223 is divided into an inclined plate ring part with an inclined plate structure in section and an upper part and a lower part of a vertical plate ring part which is integrally formed with the inclined plate ring part and has a vertical plate structure in section, the inclined plate ring part of the material guide ring 1223 is fixed on the inner wall of the feed hopper 1211 through bolts, and the inclined plate ring part is flush with the inner wall of the feed hopper 1211; a guide groove 1231 is downwards arranged at the top end of the lining grinding plate 123, a sliding block hinge 124 is arranged in the guide groove 1231 in a matching and sliding manner, a top touch rod 125 is hinged on the sliding block hinge 124, the top touch rod 125 is horizontally and slidably arranged on the material guiding ring 1223 along the radial direction of the feed hopper 1211, and the top touch rod 125 is specifically and slidably arranged on a vertical ring part of the material guiding ring 1223; the lining grinding plate 123 is hinged with the inner wall end of the grinding disc housing 1222, and three return springs 126 are welded between the lining grinding plate 123 and the inner wall of the grinding disc housing 1222; the guide cylinder 111 is sleeved with and welded with a guide ring 127, the outer side wall of the guide ring 127 is formed by twelve groove surfaces and twelve convex surfaces which are alternately distributed, the groove surfaces and the convex surfaces are in smooth transition, and the top contact rod 125 keeps contact with the outer side wall of the guide ring 127. The extrusion rough grinding device 1 further comprises a rotating support frame 13, the feed hopper 1211 is rotatably mounted on the rotating support frame 13 through a bearing, a hopper belt wheel 1224 is fixed on the feed hopper 1211, the motor can be assembled through matching, and the belt sleeve is arranged between the motor output shaft and the material belt wheel to drive the feed hopper 1211 to rotate, so that the whole rotary grinding disc 12 is driven to integrally and vertically rotate.

In the process of processing coal briquettes into coal dust, the coal briquettes are first coarsely crushed by one round of the extrusion coarse crushing device 1, and specifically, in the process, the rotary grinding disc 12 is in a rotating operation state, the coal briquettes are fed from a space between the feeding hopper 1211 and the material guiding cylinder 111, the coal briquettes are gradually piled up and dropped on the disc surface of the fixed grinding disc 11 and slide down along the disc surface, the lining grinding disc 123 performs rotational grinding on the downward-sliding coal briquettes, and at the same time, the lining grinding disc assembly 122 rotates synchronously with the top contact rod 125 during the rotation, because the top contact rod 125 always keeps contact with the side wall surface of the guide ring 127 under the elastic force of the return spring 126, when the top contact rod 125 rotates along the concave and convex surfaces which are alternately distributed on the side wall surface of the guide ring 127, the top contact rod 125 reciprocates and slides on the left and right on the guide ring 1223, when the top contact rod slides toward the side close to the side of the cover 1222 of the guide ring, the slide rod hinge head 124 slides upward, when the top contact rod 125 pushes the top contact rod 123, deflects and deflects toward the top end of the guide disc 123, thereby effectively pushing and the top contact rod 123 moves toward the top end of the fixed grinding disc 125 during the opposite direction, and the rotary grinding disc 123, when the top contact rod 123 slides, the top contact rod slides and the top contact rod 123 slides back and the rotary grinding disc 123 moves forward and the top contact rod slides, and the guide bar can effectively, and the top rod can move forward and the top contact rod 123 during the rotary grinding disc 123, and the rotary grinding disc 123, thereby the rotary grinding disc 123, and the rotary grinding disc can move backward and the rotary grinding disc can move forward and the rotary grinding disc 11, and the rotary grinding disc can move backward, when the rotary grinding disc can move backward and the rotary grinding disc can move.

As shown in fig. 2, 3, 5, 6, 7 and 8, the fine grinding device 2 includes a circular grinding groove 21 for pulverized coal grinding and sieving, a grinding driving mechanism 22 fixedly mounted on the circular grinding groove 21, and a grinding mechanism 23 rotatably disposed in the circular grinding groove 21, wherein the grinding driving mechanism 22 drives the grinding mechanism 23 to rotate and grind in the circular grinding groove 21. The central axis of the circular rolling groove 21, the central axis of the fixed rolling disc 11 and the rotating central axis of the rotating rolling disc 12 are superposed in a three-axis manner; the section of the circular ring rolling groove 21 is of a U-shaped structure, the outer ring of the circular ring rolling groove 21 is higher than the inner ring, a supporting ring 213 is arranged in the inner ring of the inner ring and welded with the top end in an flush manner, a fixed rolling disc 11 is welded on the supporting ring 213, and the side edge of the fixed rolling disc 11 is arranged in alignment with the inner wall of the inner ring of the circular ring rolling groove 21, so that materials can be directly introduced into the circular ring rolling groove 21 in a sliding manner; the bottom surface of the circular ring grinding groove 21 is provided with a grid groove 211, a fine grinding filter screen 212 is welded in the grid groove 211 in a fitting manner, the fine grinding filter screen 212 is used for screening and filtering the pulverized coal which is ground into qualified powder particles in the grinding process, the mesh number of the fine grinding filter screen 212 is matched with the size of the pulverized coal particles to be ground, the grid groove 211 mainly plays a supporting role for the fine grinding filter screen 212, and the grid holes of the grid groove 211 do not influence the leakage of the pulverized coal.

As shown in fig. 3, 5, 6 and 8, the grinding mechanism 23 includes an annular grinding frame 231 vertically rotatably mounted on the inner wall of the outer ring of the ring grinding groove 21 through a bearing, two grinding wheel frames 232 fixedly mounted on the annular grinding frame 231 through bolts, a grinding wheel 233 horizontally rotatably mounted on the grinding wheel frame 232, and the grinding wheel 233 in rolling contact with the fine grinding screen 212. The annular mill frame 231 is last still to be welded two with the grinding wheel frame 232 mill the frame 231 circumference on the even alternate scraper frame 234 that distributes each other, and the last butt welding of scraper frame 234 has two scrapers 235, and scraper 235 is circular-arcly, and scraper 235 one side and thin grinding filter screen 212 homonymy edge contact, and the scraper 235 lower limb and thin grinding filter screen 212 filter surface contact.

As shown in fig. 3, 5 and 6, the milling driving mechanism 22 includes a driving motor 221 vertically and fixedly mounted on the top end of the outer ring of the ring milling groove 21 through a fixing plate, and a gear ring 222 coaxially disposed and welded on the top end of the ring milling frame 231, and a driving gear 2211 engaged with the gear ring 222 is fixed on the output shaft of the driving motor 221.

As shown in fig. 2, 5 and 6, in the present embodiment, a blanking guide bin 4 is further fixedly assembled at the bottom end of the circular milling groove 21, the blanking guide bin 4 includes an inner bin body 41 and an outer bin body 42, the inner bin body 41 is correspondingly welded at the position where the bottom end of the circular milling groove 21 is aligned with the inner ring, the outer bin body 42 is correspondingly welded at the position where the bottom end of the circular milling groove 21 is aligned with the outer ring, the inner bin body 41 is flush with the bottom end of the outer bin body 42, and a serial support plate 43 is serially welded at the bottom end position. The blanking guide bin 4 is mainly used for guiding pulverized coal falling from the circular grinding groove 21 to gather towards the middle, so that centralized collection is facilitated.

As shown in fig. 2, 4, 5, 6 and 7, the cooling and heat dissipating device 3 is vertically and rotatably disposed and sequentially passes through the ring rolling slot 21, the fixed rolling disk 11 and the rotary rolling disk 12 along the central axis of the ring rolling slot 21 in the vertical direction; when the cooling and heat dissipating device 3 rotates, the cooling and heat dissipating device 3 dissipates heat and cools the inside of the housing of the fixed rolling stand 11. The cooling and heat dissipating device 3 comprises a vertically rotating circular tube 31, the circular tube 31 is vertically and rotatably mounted on a serial-connection supporting plate 43 through a bearing, and the circular tube 31 sequentially penetrates through the circular ring rolling slot 21, the fixed rolling disc 11 and the rotary rolling disc 12 upwards; eight bent branch pipes 32 are uniformly distributed and welded on the circumference of the round pipe 31, the bent branch pipes 32 are positioned in an inner cavity of a shell of the fixed rolling disc 11, each bent branch pipe 32 comprises an inclined pipe section 321 and a horizontal pipe section 322, the inclined pipe section 321 is communicated with the round pipe 31 in a bent manner, the inclination of the inclined pipe section 321 is the same as that of a round table top of the fixed rolling disc 11, a part of the round pipe 31 between a conducting opening of the inclined pipe section 321 and a conducting opening of the horizontal pipe section 322 is of a closed disconnecting structure, and pipe joints 312 capable of being externally connected with water pipes through rotary joints are arranged at the top end and the bottom end of the round pipe 31; the inclined pipe section 321 is welded with a sector plate-shaped adherence heat-conducting plate 34, the adherence heat-conducting plate 34 is a thin plate structure with the thickness of 2mm, and the adherence heat-conducting plate 34 is contacted with the inner wall of the shell of the fixed grinding disc 11. The horizontal pipe section 322 is welded with the wind plate 33, eight heat dissipation holes 112 are evenly distributed on the top end of the fixed rolling disc 11 at the circumference of the area between the material guiding cylinder 111 and the circular pipe 31, and the heat dissipation holes 112 are convenient for air circulation and heat dissipation. The cooling device 3 mainly adopts water cooling, the round tube 31 is provided with a round tube belt wheel 311 near the bottom end, and the rotation driving of the cooling device 3 is the same as the rotation driving of the rotary rolling disc 12, which is not described herein. In order to ensure that the circular tube 31 and the eight bent branch tubes 32 are always filled with cooling water, the water flow circulation direction is downward inlet and upward outlet, that is, the cooling water is introduced from the pipe joint 312 at the bottom end of the circular tube 31 and then enters each bent branch tube 32 along the inner cavity of the circular tube 31, the cooling water firstly enters the horizontal pipe section 322, then enters the inclined pipe section 321, and enters the inner cavity of the circular tube 31 again in the bent branch tubes 32, and finally is discharged upward from the pipe joint 312 at the top end of the circular tube 31.

In carrying out buggy course of working, cooling heat abstractor 3 will carry out initiative heat dissipation, it is concrete, in operation, when cooling heat abstractor 3 is in the rotating condition, cooling water in the cooling line is in the circulation state, adherence heat-conducting plate 34 will be rotatory along the contact of fixed 11 shells inner wall of rolling dish, and will fix the heat and conduct to branch pipe 32 of bending through adherence heat-conducting plate 34 on the rolling dish 11, and take the heat out through the circulation of cooling water, thereby initiatively carry out the water-cooling to fixed rolling dish 11, and simultaneously, wind board 33 is rotatory along with pipe 31, thereby initiatively strengthen the air fluidity, and upwards pass louvre 112 along with the air and take out with the ambient heat through cooling heat abstractor 3, to sum up, can reduce the local ambient temperature in the equipment course of working through cooling heat abstractor 3, then greatly reduced the risk of blasting in the buggy course of working.

The coal blocks primarily crushed by one wheel are directly fallen into the circular ring milling groove 21 by extruding the coarse milling device 1, the fine milling device 2 further performs second-round fine milling on the coal blocks, specifically, in an operating state of the apparatus, the driving motor 221 is in a starting state, the driving motor 221 drives the gear ring 222 to rotate through the driving gear 2211, the gear ring 222 further drives the circular milling frame 231 to synchronously rotate therewith, when the circular milling frame 231 rotates, the milling wheel 233 rotates along with the circular ring milling groove 21 for rolling, the coal slag passing through one wheel of coarse milling is gradually crushed into powder under a plurality of times of milling of the milling wheel 233, some coal dust according with the size of powder particles leaks through the fine milling filter screen 212, so that the coal dust with uniform size can be collected, when the milling wheel 233 crushes, the two scraper groups synchronously rotate along with the circular milling frame 231, the scrapers 235 are arranged, the scrapers 235 are processed into an arc-shaped structure, the coal dust scraper 235 contacts the fine filter screen 212 through the lower edge of the fine milling filter screen 235, thereby the coal blocks of the coal milling roller are crushed coal blocks can be crushed, the coal dust of the compacted scraper is prevented from being crushed into the fine milling roller, the coal slag can be conveniently dispersed and the fine slag can be centralized on the side edges of the coal slag milling screen 212, and the coal slag scraper 235, so that the coal blocks can be conveniently dispersed and the coal slag can be centralized in the fine milling screen 212, and the coal slag can be conveniently cleaned by the coal slag collecting scraper 235. It should be noted that the rotation direction of the annular grinding shelf 231 is determined in consideration of the gathering effect of the scraper 235, and in fig. 6, the rotation direction is counterclockwise.

The coal dust finely ground and filtered by the fine grinding device 2 falls into the blanking guide bin 4, slides down along a channel formed by the inner bin body 41 and the outer bin body 42, and can be collected intensively.

The invention provides a pulverized coal manufacturing device for a laterite-nickel ore rotary kiln, which has the advantages that the problems of dust suspension concentration and incapability of avoiding electrostatic fire source generation under the action of mechanical force in the crushing and processing process of an inner cavity of the device cannot be effectively changed, and the local processing environment of the device is actively cooled and radiated by a cooling and radiating device 3 which is matched with the device, so that the heat concentration and the temperature rise are avoided, the environment temperature is effectively controlled below the ignition temperature of pulverized coal, the occurrence of burning explosion danger is avoided, and the safety in the processing process of the device is improved.

In addition, this equipment is provided with extrusion coarse grinding device 1 can be effectively and tentatively pulverize the cinder with the coal cinder to further grind shredding process to the cinder through the fine grinding device 2 that sets up, and carry out synchronous screening through the fine grinding filter screen 212 in the annular groove of rolling and filter, thereby accomplish the shredding process of the buggy of required particle size effectively fast through the kibbling mode of substep.

It should be understood by those skilled in the art that the modifications can be implemented by combining the prior art and the above embodiments, and the detailed description is omitted here. Such variations do not affect the essence of the present invention, and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in which devices and structures not described in detail are understood to be implemented in a manner that is conventional in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be substituted, without departing from the scope of the invention without departing from the essential scope thereof. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, unless the technical essence of the present invention is not departed from the content of the technical solution of the present invention.

Claims (9)

1. A laterite-nickel ore deposit buggy preparation equipment for rotary kiln which characterized in that: comprises an extrusion coarse grinding device (1), a fine grinding device (2) and a cooling heat dissipation device (3); wherein:

the fine grinding device (2) comprises a circular grinding groove (21) for grinding and sieving coal dust, a grinding driving mechanism (22) fixedly assembled on the circular grinding groove (21) and a grinding mechanism (23) rotatably arranged in the circular grinding groove (21), and the grinding driving mechanism (22) drives the grinding mechanism (23) to rotate and grind in the circular grinding groove (21);

the extrusion rough grinding device (1) comprises a fixed grinding disc (11) fixed in the inner ring area of the circular grinding groove (21) and a rotary grinding disc (12) vertically and rotatably arranged right above the fixed grinding disc (11); the fixed rolling disc (11) is in a circular truncated cone shell shape; the central shaft of the circular rolling groove (21), the central shaft of the fixed rolling disc (11) and the central shaft of the rotary rolling disc (12) are superposed in a three-shaft manner;

the cooling and heat-dissipating device (3) is vertically and rotationally arranged and vertically and upwards penetrates through the circular rolling groove (21), the fixed rolling disc (11) and the rotary rolling disc (12) along the central shaft of the circular rolling groove (21); when the cooling and heat-dissipating device (3) rotates, the cooling and heat-dissipating device (3) dissipates heat and cools the shell of the fixed rolling disc (11).

2. The equipment for manufacturing the pulverized coal for the laterite-nickel ore rotary kiln according to claim 1 is characterized in that: the rotary milling disc (12) comprises an outer cover shell (121), and the outer cover shell (121) comprises a feed hopper (1211) and a milling disc housing (1222) from top to bottom; a material guiding cylinder (111) is coaxially and fixedly installed at the top end of the fixed rolling disc (11), and the material guiding cylinder (111) penetrates through the outer cover shell (121) upwards; the mill housing (1222) is fitted with a number of lining mill assemblies (122) evenly distributed around its central axis.

3. The pulverized coal manufacturing equipment for the laterite-nickel ore rotary kiln according to the claim 2, characterized in that: the liner roll plate assembly (122) comprises a fan-plate shaped liner roll plate (123); a material guide ring (1213) is arranged in the outer cover shell (121), the material guide ring (1213) is fixed on the inner wall of the feed hopper (1211), the upper end part of the lining grinding plate (123) extends into the area space between the material guide ring (1213) and the grinding disc housing (1222), the top end of the lining grinding plate (123) is downwards provided with a guide groove (1231), a sliding block hinge joint (124) is arranged in the guide groove (1231) in a matching and sliding manner, a top contact rod (125) is hinged to the sliding block hinge joint (124), and the top contact rod (125) is horizontally arranged on the material guide ring (1213) along the radial direction of the feed hopper (1211) in a sliding manner; the inner lining grinding plate (123) is hinged with the inner wall end of the grinding disc housing (1222), and a plurality of return springs (126) are fixedly connected between the inner lining grinding plate (123) and the inner wall of the grinding disc housing (1222); the guide cylinder (111) is fixedly sleeved with a guide ring (127), the outer side wall of the guide ring (127) is formed by a plurality of groove surfaces and a plurality of protrusion surfaces which are distributed at intervals, the groove surfaces and the protrusion surfaces are in smooth transition, and the top touch rod (125) is in contact with the outer side wall of the guide ring (127).

4. The equipment for manufacturing the pulverized coal for the laterite-nickel ore rotary kiln according to claim 2 is characterized in that: the cooling and heat-dissipating device (3) comprises a circular tube (31) which rotates vertically, and the circular tube (31) sequentially penetrates through a circular rolling groove (21), a fixed rolling disc (11) and a rotary rolling disc (12) upwards; a plurality of bending branch pipes (32) are uniformly distributed and fixedly connected to the upper circumference of the round pipe (31), the bending branch pipes (32) are positioned in an inner cavity of a shell of the fixed rolling disc (11), each bending branch pipe (32) comprises an inclined pipe section (321) and a horizontal pipe section (322), the inclined pipe sections (321) are communicated with the horizontal pipe sections (322) in a bending mode, the inclination of the inclined pipe sections (321) is the same as that of a round table top of the fixed rolling disc (11), and a part, positioned between a conduction opening of the inclined pipe sections (321) and a conduction opening of the horizontal pipe sections (322), in the round pipe (31) is of a closed disconnecting structure; a sector plate-shaped adherence heat-conducting plate (34) is fixed on the inclined pipe section (321), and the adherence heat-conducting plate (34) is contacted with the inner wall of the shell of the fixed rolling disc (11).

5. The pulverized coal manufacturing equipment for the laterite-nickel ore rotary kiln according to claim 4, characterized in that: the horizontal pipe section (322) is fixedly provided with an air plate (33), and a plurality of heat dissipation holes (112) are uniformly distributed in the circumference of the area between the material guide cylinder (111) and the circular pipe (31) at the top end of the fixed rolling disc (11).

6. The pulverized coal manufacturing equipment for the laterite-nickel ore rotary kiln according to the claim 1, characterized in that: the tank bottom surface that the ring rolled groove (21) is grid groove (211), be fixed with fine grinding filter screen (212) in grid groove (211) laminating.

7. The equipment for manufacturing the pulverized coal for the laterite-nickel ore rotary kiln according to claim 6, is characterized in that: grinding mechanism (23) include through the vertical rotation of bearing install annular grinding frame (231) on ring groove (21) outer loop inner wall, fixed mounting has a plurality of grinding wheel frame (232) on annular grinding frame (231), grinding wheel frame (232) are gone up the level and are rotated and install grinding wheel (233), grinding wheel (233) with fine grinding filter screen (212) rolling contact.

8. The pulverized coal manufacturing equipment for the laterite-nickel ore rotary kiln according to the claim 7, characterized in that: still fixed mounting on the annular frame (231) of milling have with the same and even alternate distribution's each other scraper frame (234) of roller frame (232), scrape two scrapers (235) of relative fixedly connected with on the scraper frame (234), scraper (235) are circular-arcly, just scraper (235) a side with thin rolling filter screen (212) homonymy edge contact, just scraper (235) lower limb with thin rolling filter screen (212) cross the face contact of crossing.

9. The pulverized coal manufacturing equipment for the laterite-nickel ore rotary kiln according to the claim 3, characterized in that: the inner lining grinding plate (123) is provided with a plurality of grinding teeth (1232) which face the fixed grinding disc (11).

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