A mill for producing ultra-fine slag powder

Abstract

The present invention relates to the technical field of slag grinding, and discloses a grinding mill for producing ultrafine slag powder, comprising a cylindrical outer shell, a grinding cone disk fixedly mounted at the bottom end of the driving shaft; a rotating drum fixedly mounted at the bottom of the grinding cone disk, an annular grinding disk fixedly mounted on the inner wall of the cylindrical outer shell, and three groups of roller assemblies arranged in an array on the outer wall of the rotating drum; a mounting cover fixedly mounted on the inner wall of the cylindrical outer shell, and an annular screening assembly fixedly mounted on the bottom wall of the fan-shaped groove. The slag moves downward in the grinding channel between the grinding cone disk and the cone shell by driving the driving motor with the driving shaft to rotate, and the slag is ground into small particles under the squeezing action of the grinding cone disk and the cone shell; the roller rolls on the annular grinding disk to grind and crush the slag on the top of the annular grinding disk, so that the slag is crushed twice; thus, the driving motor can drive the grinding cone disk slowly with a relatively low output power, so as to achieve the purpose of grinding and crushing the slag.

Description

Technical Field

[0001] The invention relates to the technical field of slag grinding, in particular to a grinding machine for producing ultra-fine slag powder. Background Art

[0002] Slag is a by-product of ore smelting. Slag can be recycled for many purposes. It can be used as a building material for paving roads, or it can be ground into slag powder for processing cement and other products. Due to the different requirements for the particle size of slag powder, it is also necessary to screen the slag powder.

[0003] A Chinese patent with an application date of 2024-05-07 and a publication number of CN118142629A discloses a slag micro-powder processing and grinding device, comprising a grinding bin, a feed bin is fixedly installed at the top of the grinding bin, a feed port is fixedly installed at the top of the feed bin, and a rotating drive motor is fixedly installed at the middle of the bottom end of the grinding bin. The slag micro-powder processing and grinding device is provided with a separation filter ring for supporting and screening, thereby changing the lifting and grinding mode of the existing grinding device, adopting a separation filter ring to carry and continuously grind the carried slag during the rotation of the grinding component, and during the rotation process, the shovel block will continuously shovel the ground slag at the bottom for screening, so as to ensure that the upper surface of the separation filter ring will not be blocked, and the normal screening effect is ensured, so that the micro-powder that has reached the grinding accuracy is filtered and separated from the separation filter ring in time, and repeated grinding in the grinding bin to avoid excessive grinding is avoided, thereby ensuring the quality of the slag micro-powder.

[0004] In this technical solution, the grinding roller moves outwards by rotating the central shaft under the action of centrifugal force to squeeze and crush the slag. In order to increase the squeezing force of the grinding roller on the slag, the central shaft needs to rotate at a higher speed, which means that the drive motor needs to drive the central shaft to rotate with a larger output power. In addition, during the movement of the grinding roller, the slag will be pushed to move on the separation filter ring. The separation filter ring is easily damaged by the friction of the slag for a long time, making it difficult to ensure the screening effect; further improvements can be made. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a grinding mill for producing ultrafine slag powder, which has the advantages of low motor output power during grinding and stable screening of slag powder. It solves the problem that the motor output power is large during grinding and the slag rubs the separation filter ring for a long time, affecting the screening effect of the separation filter ring.

[0006] In order to achieve the purpose of low motor output power and stable screening of slag powder during the above-mentioned grinding, the present invention provides the following technical solutions: a grinding mill for producing ultra-fine slag powder, comprising a cylindrical shell, a driving shaft is arranged at the central axis of the top end of the cylindrical shell, and a grinding cone is fixedly installed at the bottom end of the driving shaft; a rotating drum is fixedly installed at the bottom of the grinding cone, an annular grinding disc is fixedly installed on the inner wall of the cylindrical shell, the annular grinding disc is sleeved on the outer side of the bottom end of the rotating drum, three groups of rolling roller assemblies are arranged in an array on the outer wall of the rotating drum, and three groups of through grooves are opened in an array on the circumferential surface of the rotating drum; a mounting cover is fixedly installed on the inner wall of the cylindrical shell, the mounting cover is located directly below the annular grinding disc, an annular screening assembly is fixedly installed on the bottom wall of the mounting cover, and a fan-shaped groove is opened through the bottom array of the mounting cover, and after the slag is ground by the rolling roller assembly and the annular grinding disc, it passes through the through groove and falls on the annular screening assembly.

[0007] Preferably, a conical shell is integrally formed on the top of the cylindrical outer shell, and the conical shell is in an inverted cone shape. A feed hopper is integrally formed on the top of the conical shell, and the grinding cone disk is located inside the conical shell. A grinding channel with a ring-shaped cross section is formed between the grinding cone disk and the inner wall of the conical shell, and the width of the grinding channel gradually decreases from top to bottom; a discharge hopper is integrally formed on the bottom of the cylindrical outer shell, and a discharge pipe is integrally formed on the bottom of the discharge hopper, a blowing pipe is fixedly installed on the bottom end of the discharge pipe, the discharge pipe is perpendicular to the top of the blowing pipe, and the left end of the blowing pipe is connected to a blower through a pipe.

[0008] Preferably, the roller assembly includes three groups of fixed shafts fixed in an array on the outer wall of the rotating drum, the rollers are rotatably connected to the outer sides of the fixed shafts, a partition cover is sleeved on the outer side of the roller, one end of the partition cover is fixedly mounted on the outer wall of the rotating drum, and the other end is fitted on the inner wall of the cylindrical shell, the partition cover is connected with the interior of the rotating drum through a through groove; along the counterclockwise direction, a slag inlet is provided on the front side of the partition cover, the through groove is located on the rear side of the roller, a shovel plate is fixedly mounted on the bottom of the inner wall on the rear side of the partition cover, the top of the shovel plate is inclined and flush with the bottom wall of the through groove, a baffle is fixedly mounted on the upper part of the inner wall on the rear side of the partition cover, and the other end of the baffle is fitted on the surface of the roller.

[0009] Preferably, a connecting plate is fixedly installed at the bottom end of the rotating drum, and the connecting plate is attached to the bottom of the annular grinding disc and to the top of the mounting cover; three groups of L-shaped material channels are fixed to the inner wall array of the rotating drum, and the L-shaped material channels correspond to the through grooves one by one, and the L-shaped material channels are connected to the through grooves; the horizontal part of the L-shaped material channels is located directly above the annular screening assembly, and a material drop chute is penetrated through the bottom array of the horizontal part of the L-shaped material channels; three groups of arc-shaped enclosure plates are fixed to the top array of the connecting plate, and the arc-shaped enclosure plates penetrate the connecting plate and extend to the lower side of the connecting plate, and each of the arc-shaped enclosure plates is connected between two adjacent L-shaped material channels.

[0010] Preferably, the annular screening assembly includes a sealing disk fixedly mounted at the center of the bottom wall of the mounting cover, the sealing disk being affixed to the bottom of the arc-shaped enclosure plate and the bottom of the L-shaped material channel, a plurality of steel rings are concentrically arranged on the outside of the sealing disk, an annular screen groove is formed between two adjacent steel rings, and both side walls of the annular screen groove are arrayed with convex strips.

[0011] Preferably, an arc-shaped pusher plate is fixedly installed at the bottom of the connecting plate, and the arc-shaped pusher plate is attached to the top of the steel ring. Along the counterclockwise direction, an inclined portion is provided at the bottom of the front end of the arc-shaped pusher plate, and a plurality of arc-shaped sheets are fixedly installed at the bottom of the arc-shaped pusher plate, and the arc-shaped sheets slide in the annular screen groove.

[0012] Preferably, along the counterclockwise direction, elastic steel sheets are fixedly installed on both sides of the rear end of the arc-shaped sheet, and the free ends of the elastic steel sheets are fitted on the inner wall of the annular sieve groove.

[0013] Preferably, an annular groove is provided on the top of the sealing disk, and the annular groove consists of two groups of inner arc grooves, two groups of outer arc grooves and four groups of inclined grooves; the two groups of inner arc grooves are distributed left and right, and the two groups of outer arc grooves are distributed front and back, the radius of the inner arc groove is smaller than the radius of the outer arc groove, and the four groups of inclined grooves are respectively connected between the ends of the inner arc groove and the outer arc groove; an L-shaped plate 1 is slidably connected inside the horizontal part of the L-shaped material channel, and the L-shaped plate 1 passes through the corner of the L-shaped material channel, and a material drop groove 2 is provided through the array of the horizontal part of the L-shaped plate 1, an inclined plate is fixedly installed on the upper surface of the horizontal part of the L-shaped plate 1, and an L-shaped plate 2 is fixedly installed on the other end of the inclined plate, and the horizontal part of the L-shaped plate 2 passes through and is slidably connected to the L-shaped material channel, and a sliding column is fixedly installed at the bottom of one end of the L-shaped plate 1 located outside the L-shaped material channel, and the sliding column is slidably connected in the annular groove on the top of the sealing disk.

[0014] Preferably, a scraper assembly is provided in the lower half of the cylindrical shell, and the scraper assembly includes a connecting shaft fixedly installed at the center of the bottom of the connecting disk, the connecting shaft penetrates and is rotatably connected to the sealing disk and the center of the mounting cover, and an auger is fixedly installed on the bottom end of the connecting shaft, and the auger is rotatably connected to the discharge pipe; a sleeve is provided on the outer side of the connecting shaft, and two groups of bosses are fixedly installed on the outer wall of the connecting shaft, and two groups of slide grooves are opened on the inner wall of the sleeve, and the sleeve is slidably connected to the outer side of the boss through the slide groove; a cross arm is fixed to the outer array of the top end of the sleeve, and the cross arm is opposite to the fan-shaped groove one by one, and a vertical scraper is fixedly installed on the other end of the cross arm, and the vertical scraper is attached to the inner wall of the cylindrical shell, and an avoidance groove is penetrated on the surface of the vertical scraper, and a horizontal scraper is fixedly installed on the top of the cross arm; a guide ring is fixedly installed on the inner wall of the cylindrical shell, and the guide ring is wavy and passes through the inside of the avoidance groove.

[0015] Preferably, the guide ring includes an upper arc plate and a lower arc plate fixed in an array on the inner wall of the cylindrical shell, the upper arc plates correspond one-to-one to the fan-shaped grooves, the upper arc plates are located directly below the fan-shaped grooves, and the central angle of the upper arc plates is smaller than the central angle of the fan-shaped grooves; the number of the lower arc plates is equal to the number of the upper arc plates, and each of the lower arc plates is located between two adjacent upper arc plates, and an inclined arc plate is connected between the opposite ends of the lower arc plate and the upper arc plate.

[0016] Compared with the prior art, the present invention provides a mill for producing ultrafine slag powder, which has the following beneficial effects:

[0017] 1. The mill for producing ultra-fine slag powder rotates through a driving motor with a driving shaft, driving the grinding cone to rotate; after the slag is added into the feed hopper, the slag moves downward in the grinding channel between the grinding cone and the cone shell, and is ground into small particles under the extrusion of the grinding cone and the cone shell; the roller rolls on the annular grinding disc to crush the slag on the top of the annular grinding disc, so that the slag is crushed twice; thereby driving the motor with a lower output power to slowly rotate the grinding cone, so as to achieve the purpose of grinding and crushing the slag;

[0018] 2. The mill for producing ultrafine slag powder rotates synchronously with the drum through the connection plate and the arc-shaped push plate. When the slag stuck on the top of the annular screen slot contacts the inclined portion, the arc-shaped push plate presses the slag into the annular screen slot, thereby squeezing the slag through the cooperation of the arc-shaped push plate and the steel ring, so that the slag is crushed again, and the particle size of the slag is smaller than the width of the annular screen slot; the arc-shaped sheet slides inside the annular screen slot, pushing the slag inside the annular screen slot to move, and then the slag is further crushed by the friction between the slag and the convex strips; thereby achieving stable screening of the slag powder, preventing the annular screening component from being blocked, and further crushing the slag powder;

[0019] 3. The mill for producing ultra-fine slag powder blocks the slag ground by the grinding cone through a separation cover, and the slag ground by the roller is scooped up by a shovel plate and transferred to the top of the annular screening assembly through a through groove and an L-shaped material channel, so that the slag after the first grinding and the slag after the second grinding are separated by the separation cover, so as to avoid the slag on the top of the annular grinding disc from being ground multiple times, thereby ensuring the grinding efficiency;

[0020] 4. The mill for producing ultrafine slag powder rotates along with the drum through the L-shaped material channel, so that the slag falls on the top of the annular screening assembly along the annular path. At the same time, the L-shaped plate 1, the inclined plate and the L-shaped plate 2 reciprocate inside the L-shaped material channel, so that the slag inside the L-shaped material channel falls stably to the top of the annular screening assembly, thereby preventing excessive slag from accumulating on the top of the annular screening assembly and ensuring the screening stability of the slag by the annular screening assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a mill for producing ultrafine slag powder proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of a cylindrical shell of a mill for producing ultra-fine slag powder proposed by the present invention after being cut;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of a mounting cover of a mill for producing ultra-fine slag powder proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the cutaway three-dimensional structure of a cylindrical housing and a mounting cover of a mill for producing ultrafine slag powder proposed by the present invention;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of a roller assembly of a mill for producing ultra-fine slag powder proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of a separation cover in a roller assembly of a mill for producing ultra-fine slag powder proposed by the present invention after being cut;

[0027] Figure 7 A schematic diagram of the three-dimensional structure of an L-shaped material channel and an arc-shaped enclosure plate of a mill for producing ultra-fine slag powder proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of an L-shaped material channel of a mill for producing ultra-fine slag powder proposed by the present invention after being cut;

[0029] Fig. 9 A schematic diagram of the three-dimensional structure of an annular screening assembly of a mill for producing ultra-fine slag powder proposed by the present invention;

[0030] Fig.10 A schematic diagram of a top view of the structure of an annular screening assembly of a mill for producing ultrafine slag powder proposed by the present invention;

[0031] Fig.11 This is a schematic diagram of the structure of an annular groove provided on the top of a sealing disk of a mill for producing ultrafine slag powder proposed by the present invention;

[0032] Fig.12 This is a schematic diagram of the structure of the L-shaped material channel of a mill for producing ultra-fine slag powder proposed by the present invention when viewed from above;

[0033] Fig.13This is a schematic diagram of the three-dimensional structure of an arc-shaped pusher plate of a mill for producing ultra-fine slag powder proposed by the present invention;

[0034] Fig.14 This is a schematic diagram of a three-dimensional cross-sectional structure of a powder scraping assembly and a cylindrical shell of a mill for producing ultra-fine slag powder proposed by the present invention;

[0035] Fig.15 This is a schematic diagram of a three-dimensional cross-sectional structure of a powder scraping assembly of a mill for producing ultra-fine slag powder proposed by the present invention;

[0036] Fig.16 This is a schematic diagram of the main structure of a guide ring in a powder scraping assembly of a mill for producing ultrafine slag powder proposed by the present invention.

[0037] In the figure: 100, cylindrical housing; 200, driving shaft; 300, grinding cone; 400, rotating drum; 500, annular grinding disc; 600, grinding roller assembly; 700, mounting cover; 800, annular screening assembly; 900, powder scraping assembly;

[0038] Conical shell; 102, feed hopper; 103, discharge hopper; 104, discharge pipe; 105, blowing pipe;

[0039] Through slot; 402, connecting plate; 403, L-shaped material channel; 404, arc-shaped enclosure; 405, blanking chute 1; 406, L-shaped plate 1; 407, blanking chute 2; 408, inclined plate; 409, L-shaped plate 2; 410, sliding column; 411, arc-shaped push plate; 412, inclined portion; 413, arc-shaped sheet; 414, elastic steel sheet;

[0040] Fixed shaft; 602, roller; 603, partition cover; 604, shovel plate; 605, baffle plate;

[0041] Sector groove;

[0042] Sealing disc; 802, steel ring; 803, convex strip; 804, inner arc groove; 805, outer arc groove; 806, inclined groove;

[0043] Connecting shaft; 902, auger; 903, sleeve; 904, boss; 905, slide; 906, cross arm; 907, vertical scraper; 908, avoidance groove; 909, horizontal scraper; 910, upper arc plate; 911, lower arc plate; 912, inclined arc plate. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-Figure 4 A mill for producing ultra-fine slag powder comprises a cylindrical shell 100, a driving shaft 200 is arranged at the central axis of the top of the cylindrical shell 100, and a grinding cone 300 is fixedly installed at the bottom of the driving shaft 200. A driving motor is connected to the top of the driving shaft 200, and the driving motor drives the driving shaft 200 to rotate counterclockwise. A rotating drum 400 is fixedly installed at the bottom of the grinding cone 300, and an annular grinding disc 500 is fixedly installed on the inner wall of the cylindrical shell 100. The annular grinding disc 500 is sleeved on the outer side of the bottom of the rotating drum 400, and three groups of roller assemblies 600 are arranged in an array on the outer wall of the rotating drum 400, so that the rotating drum 400 follows the grinding cone 300 and the driving shaft 200 to rotate counterclockwise at a slow speed, and the roller assembly 600 moves slowly on the top of the annular grinding disc 500, and in this process, the slag on the top of the annular grinding disc 500 is squeezed by the roller assembly 600 and is ground into smaller particles. The circumferential surface of the drum 400 is provided with three groups of through slots 401 in an array, and the slag ground by the roller assembly 600 enters the inside of the drum 400 through the through slots 401. A mounting cover 700 is fixedly mounted on the inner wall of the cylindrical housing 100, and the mounting cover 700 is inverted so that its opening faces upward. The mounting cover 700 is located directly below the annular grinding disc 500, and an annular screening assembly 800 is fixedly mounted on the bottom wall of the mounting cover 700. The bottom of the mounting cover 700 is provided with fan-shaped slots 701 in an array, and the slag is ground by the roller assembly 600 and the annular grinding disc 500, and then passes through the through slots 401 and falls on the annular screening assembly 800. The slag is screened by the annular screening assembly 800.

[0046] See also Figure 1-Figure 4 A conical shell 101 is integrally formed on the top of the cylindrical shell 100. The conical shell 101 is in an inverted cone shape. A feed hopper 102 is integrally formed on the top of the conical shell 101. The conical shell 101 and the feed hopper 102 form a hollow hourglass-shaped structure.

[0047] The grinding cone 300 is located inside the conical shell 101, and the grinding cone 300 and the conical shell 101 form a one-time grinding structure. A grinding channel with a circular cross section is formed between the grinding cone 300 and the inner wall of the conical shell 101, and the width of the grinding channel gradually decreases from top to bottom. Therefore, after the slag is added into the feed hopper 102, the slag moves downward along the grinding channel between the grinding cone 300 and the conical shell 101, and as the slag moves downward, the squeezing force of the grinding cone 300 and the conical shell 101 gradually increases, thereby grinding the slag into small pieces of slag. In addition, the diameter of the bottom end of the grinding cone 300 is greater than the inner diameter of the annular grinding disc 500, so that the slag after one grinding falls on the top of the annular grinding disc 500 under the guidance of the grinding cone 300.

[0048] A discharge hopper 103 is integrally formed at the bottom of the cylindrical housing 100, a discharge pipe 104 is integrally formed at the bottom of the discharge hopper 103, a blow pipe 105 is fixedly installed at the bottom of the discharge pipe 104, the discharge pipe 104 is perpendicular to the top of the blow pipe 105, and a blower is connected to the left end of the blow pipe 105 through a pipeline. The ground slag is guided by the discharge hopper 103, passes through the discharge pipe 104 and enters the inside of the blow pipe 105, and then blows air into the blow pipe 105 through the blower to blow out the slag.

[0049] See also Figure 5-Figure 6 The roller assembly 600 includes three groups of fixed shafts 601 fixed in an array on the outer wall of the rotating drum 400. The outer side of the fixed shaft 601 is rotatably connected with a roller 602. A gap is reserved between the bottom of the roller 602 and the top of the annular grinding disc 500. During the rotation of the rotating drum 400, the fixed shaft 601 and the roller 602 follow the rotating drum 400 to make a circular motion. When the particle size of the slag on the top of the annular grinding disc 500 is larger than the gap between the roller 602 and the annular grinding disc 500, the slag is squeezed by the roller 602 and ground into smaller particles.

[0050] A separation cover 603 is sleeved on the outer side of the roller 602, one end of the separation cover 603 is fixedly mounted on the outer wall of the drum 400, and the other end is attached to the inner wall of the cylindrical shell 100. Moreover, the top of the separation cover 603 is arc-shaped, and when the slag on the top of the grinding cone 300 rolls down, it falls on the top of the annular grinding disc 500 through the guiding effect of the top of the separation cover 603.

[0051] In the counterclockwise direction, a slag inlet is provided at the front side of the separation cover 603, and the through slot 401 is located at the rear side of the roller 602. The separation cover 603 is connected to the inside of the drum 400 through the through slot 401. A shovel plate 604 is fixedly installed at the bottom of the inner wall at the rear side of the separation cover 603. The top of the shovel plate 604 is inclined and flush with the bottom wall of the through slot 401. A baffle plate 605 is fixedly installed at the upper part of the inner wall at the rear side of the separation cover 603, and the other end of the baffle plate 605 is attached to the surface of the roller 602. Thus, the slag ground by the roller 602 is scooped up by the shovel plate 604 and blocked from the top by the baffle plate 605 to prevent the ground slag from moving from the top of the roller 602 to the front side of the roller 602. Thus, the ground slag is gathered between the shovel plate 604 and the baffle plate 605, and as the ground slag increases, the slag passes through the through slot 401 and enters the inside of the drum 400. In addition, the baffle 605 is attached to the surface of the roller 602 to scrape off the slag attached to the surface of the roller 602, thereby ensuring that the size of the gap between the roller 602 and the annular grinding disc 500 is stable.

[0052] See also Figure 7-Figure 8 A connection plate 402 is fixedly mounted at the bottom of the drum 400, and the connection plate 402 is attached to the bottom of the annular grinding disc 500 and to the top of the mounting cover 700. Three groups of L-shaped channels 403 are fixed to the inner wall array of the drum 400, and the opening of the vertical part of the L-shaped channel 403 is sealed by the side wall of the drum 400, and the opening of the horizontal part of the L-shaped channel 403 is sealed by the connection plate 402.

[0053] The L-shaped channel 403 corresponds to the through slot 401 one by one, and the L-shaped channel 403 is connected to the through slot 401. The horizontal part of the L-shaped channel 403 is located directly above the annular screening assembly 800, and the bottom array of the horizontal part of the L-shaped channel 403 is penetrated by a material drop trough 1 405. Therefore, the slag ground by the roller 602 passes through the through slot 401 and enters the L-shaped channel 403. When the slag falls on the horizontal part of the L-shaped channel 403, it passes through the material drop trough 1 405 and falls on the top of the annular screening assembly 800. The connecting plate 402 is driven to rotate by the rotating drum 400, so that the three groups of L-shaped channels 403 make circular motion synchronously, so that the slag falls evenly on the top of the annular screening assembly 800.

[0054] Three groups of arc-shaped panels 404 are fixed in an array on the top of the connection plate 402. The arc-shaped panels 404 penetrate the connection plate 402 and extend to the lower side of the connection plate 402. Each arc-shaped panel 404 is connected between two adjacent L-shaped channels 403. The arc-shaped panel 404 is flush with the bottom of the L-shaped channel 403.

[0055] See also Figure 9-13The annular screening assembly 800 includes a sealing disk 801 fixedly mounted at the center of the bottom wall of the mounting cover 700. The sealing disk 801 fits the bottom of the arc-shaped enclosure 404 and the bottom of the L-shaped material channel 403. The sealing disk 801 seals the bottom of the three groups of arc-shaped enclosures 404 to prevent slag from entering. A plurality of steel rings 802 are concentrically arranged on the outside of the sealing disk 801, and an annular screen slot is formed between two adjacent steel rings 802. Both side walls of the annular screen slot are arrayed with convex strips 803. Therefore, when the slag falls on the annular screen slot through the L-shaped material channel 403, the slag with smaller particle size can pass through the annular screen slot, and the slag with larger particle size is stuck inside the annular screen slot or stuck at the top opening of the annular screen slot.

[0056] The bottom of the connecting plate 402 is fixedly installed with an arc-shaped push plate 411, which fits on the top of the steel ring 802. In the counterclockwise direction, the bottom of the front end of the arc-shaped push plate 411 is provided with an inclined portion 412, and the bottom of the arc-shaped push plate 411 is fixedly installed with a plurality of arc-shaped pieces 413, which slide in the annular screen groove. Therefore, when the connecting plate 402 rotates with the rotating drum 400, the arc-shaped push plate 411 performs a circular motion synchronously, and when the slag stuck at the top opening of the annular screen groove contacts the front end of the arc-shaped push plate 411, the slag is pressed into the annular screen groove by the setting of the inclined portion 412, thereby crushing the slag into small pieces. The arc-shaped piece 413 slides in the annular screen groove, pushing the slag inside the annular screen groove to move, causing the slag to rub against the convex strip 803, and the slag is crushed into smaller particles.

[0057] Along the counterclockwise direction, elastic steel sheets 414 are fixedly installed on both sides of the rear end of the arc-shaped sheet 413, and the free ends of the elastic steel sheets 414 are attached to the inner wall of the annular sieve slot. When the arc-shaped sheet 413 moves inside the annular sieve slot, the convex strip 803 will block the elastic steel sheet 414, causing the elastic steel sheet 414 to bend and deform. When the free end of the elastic steel sheet 414 passes over the convex strip 803, it rebounds under the action of its own elasticity. In this process, the free end of the elastic steel sheet 414 impacts the slag inside the annular sieve slot to prevent the slag from adhering to the annular sieve slot and causing blockage.

[0058] See also Figure 8-Figure 12 The top of the sealing disk 801 is provided with an annular groove, which is composed of two groups of inner arc grooves 804, two groups of outer arc grooves 805 and four groups of inclined grooves 806. The two groups of inner arc grooves 804 are distributed left and right, and the two groups of outer arc grooves 805 are distributed front and back. The radius of the inner arc groove 804 is smaller than that of the outer arc groove 805. The four groups of inclined grooves 806 are connected between the ends of the inner arc grooves 804 and the ends of the outer arc grooves 805.

[0059] The horizontal part of the L-shaped channel 403 is slidably connected with an L-shaped plate 1 406, which passes through the corner of the L-shaped channel 403. The horizontal part of the L-shaped plate 1 406 is provided with a material drop groove 2 407, and the upper surface of the horizontal part of the L-shaped plate 1 406 is fixedly installed with an inclined plate 408. The corner of the L-shaped channel 403 is provided with an inclined chamfer, and the inclined plate 408 can be attached to the inner wall of the corner of the L-shaped channel 403.

[0060] The other end of the inclined plate 408 is fixedly installed with an L-shaped plate 2 409, which is in an inverted L shape, and the horizontal part of the L-shaped plate 2 409 penetrates and is slidably connected to the L-shaped material channel 403. A sliding column 410 is fixedly installed at the bottom of one end of the L-shaped plate 1 406 located outside the L-shaped material channel 403, and the sliding column 410 is slidably connected in the annular groove at the top of the sealing disk 801. Therefore, when the connecting disk 402 and the L-shaped material channel 403 rotate with the rotating drum 400, the sliding column 410 slides in the annular groove at the top of the sealing disk 801. When the sliding column 410 slides in the inclined groove 806, the L-shaped plate 1 406, the inclined plate 408 and the L-shaped plate 2 409 move relative to the L-shaped material channel 403. Moreover, when the slide post 410 slides along the annular groove on the top of the sealing disk 801 for one circle, the L-shaped plate 1 406, the inclined plate 408 and the L-shaped plate 2 409 make two reciprocating movements inside the L-shaped channel 403. Thus, the slag in the vertical part of the L-shaped channel 403 is pushed to the horizontal part of the L-shaped channel 403 through the reciprocating movement of the L-shaped plate 1 406, the inclined plate 408 and the L-shaped plate 2 409. Moreover, when the L-shaped plate 2 409 approaches the side wall of the drum 400, the slag can be further squeezed and broken into smaller particles through the friction between the slags.

[0061] See also Figure 14-16 The lower half of the cylindrical housing 100 is provided with a powder scraping assembly 900, which includes a connecting shaft 901 fixedly mounted at the bottom center of the connecting disk 402, so that the connecting shaft 901 rotates synchronously with the connecting disk 402. The connecting shaft 901 penetrates and is rotatably connected to the center of the sealing disk 801 and the mounting cover 700, and an auger 902 is fixedly mounted at the bottom end of the connecting shaft 901, and the auger 902 is rotatably connected to the discharge pipe 104. Thus, through the rotation of the auger 902, the slag powder inside the discharge hopper 103 passes through the discharge pipe 104 and enters the inside of the blowing pipe 105. And through the blocking effect of the auger 902 inside the discharge pipe 104, a large amount of air flowing in the blowing pipe 105 is prevented from entering the inside of the cylindrical housing 100.

[0062] A sleeve 903 is sleeved on the outside of the connecting shaft 901, two groups of bosses 904 are fixedly installed on the outer wall of the connecting shaft 901, and two groups of slide grooves 905 are opened on the inner wall of the sleeve 903. The sleeve 903 is slidably connected to the outside of the boss 904 through the slide grooves 905. Therefore, the sleeve 903 is driven to rotate by the rotation of the connecting shaft 901 in conjunction with the setting of the boss 904. And during the rotation of the sleeve 903 and the connecting shaft 901, the sleeve 903 can move up and down relative to the connecting shaft 901.

[0063] A horizontal arm 906 is fixed to the outer array of the top of the sleeve 903. The horizontal arm 906 is opposite to the fan-shaped groove 701 one by one. A vertical scraper 907 is fixedly installed at the other end of the horizontal arm 906. The vertical scraper 907 is attached to the inner wall of the cylindrical shell 100. The surface of the vertical scraper 907 is penetrated by an avoidance groove 908. A horizontal scraper 909 is fixedly installed on the top of the horizontal arm 906. The horizontal scraper 909 is used to be inserted into the inside of the fan-shaped groove 701. A guide ring is fixedly installed on the inner wall of the cylindrical shell 100. The guide ring is wavy and passes through the inside of the avoidance groove 908. Therefore, during the rotation of the sleeve 903, the horizontal arm 906 and the vertical scraper 907, the vertical scraper 907 passes through the guide ring through the avoidance groove 908, and the sleeve 903, the horizontal arm 906 and the vertical scraper 907 move up and down while rotating.

[0064] The guide ring includes an upper arc plate 910 and a lower arc plate 911 fixed in an array on the inner wall of the cylindrical shell 100. The upper arc plate 910 corresponds to the fan-shaped groove 701 one by one. The upper arc plate 910 is located directly below the fan-shaped groove 701, and the central angle of the upper arc plate 910 is smaller than the central angle of the fan-shaped groove 701. The number of lower arc plates 911 is equal to the number of upper arc plates 910, and each lower arc plate 911 is located between two adjacent upper arc plates 910. An inclined arc plate 912 is connected between the opposite ends of the lower arc plate 911 and the upper arc plate 910. When the vertical scraper 907 sweeps over the upper arc plate 910, the horizontal arm 906 sweeps in the fan-shaped groove 701 to prevent the slag from getting stuck inside the fan-shaped groove 701.

[0065] When in use, the driving motor drives the driving shaft 200 to rotate, driving the grinding cone 300 to rotate; after the slag is added into the feed hopper 102, the slag moves downward in the grinding channel between the grinding cone 300 and the cone shell 101, and is ground into small particles under the squeezing action of the grinding cone 300 and the cone shell 101;

[0066] The slag after the primary grinding falls on the top of the annular grinding disc 500 under the guidance of the grinding cone 300. When the drum 400 rotates following the grinding cone 300, the roller 602 rolls on the annular grinding disc 500 to crush the slag on the top of the annular grinding disc 500, so that the slag is secondary crushed. The slag after the secondary crushing passes through the gap between the roller 602 and the annular grinding disc 500, and is scooped up by the shovel plate 604, and then passes through the through groove 401 into the L-shaped material channel 403, and then through the drop trough 405 opened at the bottom of the L-shaped material channel 403, the slag after the secondary crushing is transported to the annular sieve groove, and the L-shaped material channel 403 rotates synchronously with the drum 400, so that the slag after the secondary crushing is evenly laid on the annular sieve groove.

[0067] Then, the connecting plate 402 and the arc-shaped push plate 411 rotate synchronously with the rotating drum 400. When the slag stuck on the top of the annular screen slot contacts the inclined portion 412, the arc-shaped push plate 411 presses the slag into the annular screen slot, thereby squeezing the slag through the cooperation of the arc-shaped push plate 411 and the steel ring 802, so that the slag is crushed again, and the particle size of the slag is smaller than the width of the annular screen slot.

[0068] At the same time, the arc-shaped sheet 413 slides inside the annular sieve slot, pushing the slag inside the annular sieve slot to move, and then the slag rubs against the convex strips 803 to further crush the slag;

[0069] When the L-shaped channel 403 rotates with the drum 400, the slide column 410 slides in the annular groove on the top of the sealing plate 801, driving the L-shaped plate 1 406, the inclined plate 408 and the L-shaped plate 2 409 to reciprocate in the L-shaped channel 403, transporting the slag in the vertical part of the L-shaped channel 403 to the horizontal part of the L-shaped channel 403, and then allowing the slag to pass through the drop trough 2 407 and fall onto the annular sieve groove;

[0070] The connecting shaft 901 and the auger 902 rotate synchronously with the connecting plate 402, so that the slag powder in the discharge hopper 103 passes through the discharge pipe 104 and enters the blowing pipe 105, and then the slag powder is blown out by the blower; during the rotation of the connecting shaft 901, the sleeve 903 is driven to rotate synchronously, and the vertical scraper 907 sweeps over the guide ring through the avoidance groove 908; the vertical scraper 907 arcs upward along the inclined arc plate 912 When the vertical scraper 907 moves, the sleeve 903, the horizontal arm 906 and the vertical scraper 907 rotate and move upward. When the vertical scraper 907 moves to the upper arc plate 910, the horizontal scraper 909 is inserted into the fan-shaped groove 701 and sweeps inside the fan-shaped groove 701 to prevent the slag powder from blocking the fan-shaped groove 701. Then, when the vertical scraper 907 moves along the inclined arc plate 912 to the lower arc plate 911, the horizontal scraper 909 is pulled out of the fan-shaped groove 701. At the same time, the vertical scraper 907 is close to the inner wall of the cylindrical shell 100 and sweeps to prevent the slag powder from adhering to the inner wall of the cylindrical shell 100.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mill for producing ultrafine slag powder, comprising a cylindrical housing (100), characterized in that: A driving shaft (200) is arranged at the central axis of the top end of the cylindrical housing (100), and a grinding cone (300) is fixedly mounted at the bottom end of the driving shaft (200); A rotating drum (400) is fixedly mounted on the bottom of the grinding cone (300); an annular grinding disc (500) is fixedly mounted on the inner wall of the cylindrical housing (100); the annular grinding disc (500) is sleeved on the outer side of the bottom end of the rotating drum (400); three groups of roller assemblies (600) are arranged in an array on the outer wall of the rotating drum (400); and three groups of through grooves (401) are arranged in an array on the circumferential surface of the rotating drum (400); A mounting cover (700) is fixedly mounted on the inner wall of the cylindrical housing (100), the mounting cover (700) being located directly below the annular grinding disc (500), an annular screening assembly (800) being fixedly mounted on the bottom wall of the mounting cover (700), a fan-shaped groove (701) being arranged through the bottom array of the mounting cover (700), and the slag, after being ground by the roller assembly (600) and the annular grinding disc (500), passes through the through groove (401) and falls onto the annular screening assembly (800); The roller assembly (600) comprises three groups of fixed shafts (601) fixed in an array on the outer wall of the rotating drum (400); the outer sides of the fixed shafts (601) are rotatably connected to rollers (602); the outer sides of the rollers (602) are sleeved with a partition cover (603); one end of the partition cover (603) is fixedly mounted on the outer wall of the rotating drum (400); the other end of the partition cover (603) is attached to the inner wall of the cylindrical shell (100); the partition cover (603) is connected to the interior of the rotating drum (400) via the through slot (401); Along the counterclockwise direction, a slag inlet is provided on the front side of the separation cover (603), the through groove (401) is located on the rear side of the roller (602), a shovel plate (604) is fixedly installed on the bottom of the inner wall on the rear side of the separation cover (603), the top of the shovel plate (604) is inclined and flush with the bottom wall of the through groove (401), a baffle plate (605) is fixedly installed on the upper part of the inner wall on the rear side of the separation cover (603), and the other end of the baffle plate (605) is attached to the surface of the roller (602); A connecting plate (402) is fixedly mounted on the bottom end of the rotating drum (400), and the connecting plate (402) is attached to the bottom of the annular grinding disc (500) and to the top of the mounting cover (700). Three groups of L-shaped material channels (403) are fixed in an array on the inner wall of the rotating drum (400). The L-shaped material channels (403) correspond to the through grooves (401) one by one, and the L-shaped material channels (403) are connected to the through grooves (401). The horizontal part of the L-shaped material channel (403) is located directly above the annular screening assembly (800), and a material drop trough (405) is provided through the bottom array of the horizontal part of the L-shaped material channel (403); Three groups of arc-shaped enclosure plates (404) are fixed in an array on the top of the connection plate (402), the arc-shaped enclosure plates (404) penetrate the connection plate (402) and extend to the lower side of the connection plate (402), and each of the arc-shaped enclosure plates (404) is connected between two adjacent L-shaped material channels (403); The annular screening assembly (800) comprises a sealing disc (801) fixedly mounted at the center of the bottom wall of the mounting cover (700), the sealing disc (801) being fitted to the bottom of the arc-shaped enclosure plate (404) and the bottom of the L-shaped material channel (403), a plurality of steel rings (802) being concentrically arranged outside the sealing disc (801), an annular screening groove being formed between two adjacent steel rings (802), and convex strips (803) being arranged in an array on both side walls of the annular screening groove; An arc-shaped push plate (411) is fixedly mounted on the bottom of the connecting plate (402). The arc-shaped push plate (411) is fitted on the top of the steel ring (802). In a counterclockwise direction, an inclined portion (412) is provided at the bottom of the front end of the arc-shaped push plate (411). A plurality of arc-shaped pieces (413) are fixedly mounted on the bottom of the arc-shaped push plate (411). The arc-shaped pieces (413) slide in the annular sieve groove.

2. The mill for producing ultrafine slag powder according to claim 1, characterized in that: A conical shell (101) is integrally formed on the top of the cylindrical outer shell (100), the conical shell (101) is in an inverted cone shape, a feed hopper (102) is integrally formed on the top of the conical shell (101), the grinding cone disc (300) is located inside the conical shell (101), and a grinding channel with a circular cross section is formed between the grinding cone disc (300) and the inner wall of the conical shell (101), and the width of the grinding channel gradually decreases from top to bottom; A discharge hopper (103) is integrally formed at the bottom of the cylindrical shell (100), a discharge pipe (104) is integrally formed at the bottom of the discharge hopper (103), a blow pipe (105) is fixedly mounted at the bottom end of the discharge pipe (104), the discharge pipe (104) is perpendicular to the top of the blow pipe (105), and the left end of the blow pipe (105) is connected to a blower via a pipeline.

3. The mill for producing ultrafine slag powder according to claim 1, characterized in that: Along the counterclockwise direction, elastic steel sheets (414) are fixedly mounted on both sides of the rear end of the arc-shaped sheet (413), and the free ends of the elastic steel sheets (414) are fitted on the inner wall of the annular sieve groove.

4. The mill for producing ultrafine slag powder according to claim 1, characterized in that: The sealing disk (801) has an annular groove on its top, the annular groove comprising two groups of inner arc grooves (804), two groups of outer arc grooves (805) and four groups of inclined grooves (806); The two groups of inner arc grooves (804) are distributed left and right, and the two groups of outer arc grooves (805) are distributed front and back. The radius of the inner arc grooves (804) is smaller than the radius of the outer arc grooves (805). The four groups of inclined grooves (806) are respectively connected between the ends of the inner arc grooves (804) and the ends of the outer arc grooves (805). The horizontal part of the L-shaped material channel (403) is slidably connected with an L-shaped plate 1 (406). The L-shaped plate 1 (406) passes through the corner of the L-shaped material channel (403). The horizontal part of the L-shaped plate 1 (406) passes through the horizontal part of the L-shaped material channel (403). A second material drop chute (407) is provided, an inclined plate (408) is fixedly installed on the upper surface of the horizontal portion of the L-shaped plate one (406), an L-shaped plate two (409) is fixedly installed on the other end of the inclined plate (408), the horizontal portion of the L-shaped plate two (409) penetrates and is slidably connected to the L-shaped material channel (403), a sliding column (410) is fixedly installed at the bottom of one end of the L-shaped plate one (406) located outside the L-shaped material channel (403), and the sliding column (410) is slidably connected in the annular groove at the top of the sealing disk (801).

5. The mill for producing ultrafine slag powder according to claim 1, characterized in that: A powder scraping assembly (900) is disposed in the lower half of the cylindrical housing (100), the powder scraping assembly (900) comprising a connecting shaft (901) fixedly mounted at the bottom center of the connecting disk (402), the connecting shaft (901) penetrating and rotatably connected to the sealing disk (801) and the center of the mounting cover (700), an auger (902) fixedly mounted at the bottom end of the connecting shaft (901), the auger (902) rotatably connected to the inside of the discharge pipe (104); The outer side of the connecting shaft (901) is sleeved with a sleeve (903), the outer wall of the connecting shaft (901) is fixedly provided with two groups of bosses (904), the inner wall of the sleeve (903) is provided with two groups of slide grooves (905), and the sleeve (903) is slidably connected to the outer side of the boss (904) through the slide grooves (905); A horizontal arm (906) is fixed in an array on the outer side of the top end of the sleeve (903), the horizontal arm (906) is opposite to the fan-shaped groove (701) one by one, a vertical scraper (907) is fixedly installed on the other end of the horizontal arm (906), the vertical scraper (907) is attached to the inner wall of the cylindrical shell (100), and a avoidance groove (908) is opened through the surface of the vertical scraper (907), and a horizontal scraper (909) is fixedly installed on the top of the horizontal arm (906); A guide ring is fixedly mounted on the inner wall of the cylindrical housing (100); the guide ring is wavy and passes through the inside of the avoidance groove (908).

6. The mill for producing ultrafine slag powder according to claim 5, characterized in that: The guide ring comprises an upper arc plate (910) and a lower arc plate (911) fixed in an array on the inner wall of the cylindrical housing (100), the upper arc plate (910) corresponding to the fan-shaped groove (701) one by one, the upper arc plate (910) being located directly below the fan-shaped groove (701), and the central angle of the upper arc plate (910) being smaller than the central angle of the fan-shaped groove (701); The number of the lower arc plates (911) is equal to the number of the upper arc plates (910), and each lower arc plate (911) is located between two adjacent upper arc plates (910), and an inclined arc plate (912) is connected between opposite ends of the lower arc plate (911) and the upper arc plate (910).

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