Screening and feeding device and blast furnace granulated slag powder production line

Abstract

The invention discloses a screening and feeding device and a blast furnace granulated slag powder production line, and relates to the technical field of slag powder production, the screening and feeding device comprises a screening cylinder, and the cylinder wall of the screening cylinder is sequentially divided into a first screening zone, a second screening zone, a third screening zone and a fourth screening zone in the circumferential direction; screening holes are evenly formed in the positions, corresponding to the first screening area, the second screening area and the third screening area, of the cylinder wall respectively, a discharging groove is formed in the position, corresponding to the fourth screening area, of the cylinder wall, and the hole diameters of the screening holes formed in the first screening area, the second screening area and the third screening area are gradually increased. The device further comprises a first carrying basket used for conveying slag powder into the screening barrel, the first carrying basket is connected with a translation module driving the first carrying basket to move in the direction close to or away from the screening barrel, and the bottom of the first carrying basket is of an arc-shaped structure so that the first carrying basket can be in sliding fit with the inner wall of the screening barrel. Four-stage screening can be achieved only through one screening barrel, and only one-time feeding is needed in the whole process.

Description

Technical Field

[0001] The invention relates to the technical field of slag powder production, and in particular to a screening feeding device and a blast furnace granulated slag powder production line. Background Art

[0002] Blast furnace granulated slag powder refers to the powder material made by drying and grinding (a small amount of gypsum can be added) granulated blast furnace slag (the slag above 1500°C floating on the surface of molten iron when smelting pig iron in a blast furnace, which is formed by quenching and rapid cooling when the slag is discharged from the slag discharge port).

[0003] Granulated blast furnace slag is fed into grinding equipment, such as vertical mills or ball mills, for grinding. These equipments refine slag particles to the required fineness by impact, grinding or rolling. The ground slag powder needs to be screened to remove impurities and large particles. Screening usually uses screens of different specifications for multi-stage screening to ensure that the particle size of the final product meets industry standards.

[0004] In the prior art, a drum screen or a rotary screen is usually used to screen the slag particles. Since the surface aperture of a group of drum screens or rotary screens remains consistent, only one-stage screening of the slag particles can be achieved. When multi-stage screening is required, multiple groups of drum screens or rotary screens with different apertures are required to perform repeated screening, which is very troublesome. Summary of the invention

[0005] The purpose of the present invention is to provide a screening feeding device and a blast furnace granulated slag powder production line to solve the following technical problems:

[0006] A set of drum screens or rotary screens cannot achieve graded screening of slag particles and requires repeated screening, which is inefficient.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A screening feeding device comprises a screening drum, wherein the drum wall of the screening drum is divided into a first screening section, a second screening section, a third screening section and a fourth screening section in a circumferential direction; the drum walls corresponding to the first screening section, the second screening section and the third screening section are respectively and evenly provided with screening holes, the drum wall corresponding to the fourth screening section is provided with a discharge groove, and the apertures of the screening holes provided in the first screening section, the second screening section and the third screening section are gradually increased;

[0009] The first carrying basket is connected to a translation module that drives the first carrying basket to move toward or away from the screening drum. The bottom of the first carrying basket is configured as an arc-shaped structure for slidingly fitting with the inner wall of the screening drum. An arc-shaped sealing plate is slidably provided at the bottom opening end of the first carrying basket. The arc-shaped sealing plate is connected to a first elastic portion arranged on a side wall of the first carrying basket.

[0010] Wherein, a rotating module is also arranged on one side of the screening drum, and the rotating module is used to drive the screening drum to rotate.

[0011] Preferably, a second carrying basket is further provided on one side of the screening drum, the second carrying basket has the same structure and size as the first carrying basket, and the two are fixed by a connecting frame.

[0012] Preferably, four groups of connected collecting boxes are provided at the bottom of the screening drum, and the collecting boxes are connected to a first driving module that drives them to reciprocate with the bottom of the screening drum.

[0013] Preferably, first racks are fixedly arranged on both sides of the collection box;

[0014] Wherein, gear rings for meshing with the first rack are respectively fixed on both sides of the cylinder wall of the screening cylinder.

[0015] Preferably, storage boxes are symmetrically arranged on both sides of the screening cylinder, and the storage boxes on both sides are fixed by limiting plates. A discharge box is provided at the bottom of the storage box, and a quantitative feeding module is provided between the discharge box and the storage box for quantitatively conveying the slag particles in the storage box to the discharge box.

[0016] Preferably, the quantitative feeding module comprises a feeding cylinder fixedly arranged between the discharge box and the storage box, a feeding roller is rotatably arranged in the feeding cylinder, a roller wall of the feeding roller is rollingly fitted with a tube wall of the feeding cylinder, and a feeding trough for conveying slag particles is provided on the roller wall of the feeding roller;

[0017] Wherein, a rotating module is provided on the outer side of the feeding cylinder, and the rotating module is used to drive the feeding roller to rotate.

[0018] Preferably, the rotating module includes a gear rotatably arranged on the outside of the feeding cylinder, the gear is fixed to the feeding roller, and second racks meshing with the gears are arranged in parallel on both sides of the gear, and ends of the second racks on both sides away from each other are fixed to the adjusting frame through a support rod, and a limit seat is correspondingly fixedly arranged on the cylinder wall of the feeding cylinder, the support rod is slidably inserted in the limit seat, and a first spring is provided on the support rod, the bottoms of the adjusting frames on both sides are fixed to the linear guide frames, and the ends of the linear guide frames on both sides close to the screening cylinder are fixed to the inclined guide frames, and the inclined guide frames on both sides are inclined toward the side away from each other;

[0019] Wherein, guide wheels are rotatably arranged at both ends of the first carrying basket and the second carrying basket.

[0020] Preferably, a closing plate is slidably arranged at the bottom of the discharge box, and a movable plate is fixedly arranged on the closing plate;

[0021] Wherein, a first guide rod which is slidably plugged with the movable plate is fixedly arranged on the outer side of the feeding cylinder, and a second spring is arranged on the first guide rod.

[0022] Preferably, at least three groups of positioning cylinders are arranged in a circumferential array in the screening cylinder, the positioning cylinders are in rolling contact with the inner wall of the screening cylinder, the two ends of the positioning cylinders are respectively rotatably connected to the limiting frames, and the top of each limiting frame is fixed to the positioning plate;

[0023] Among them, the limit plate is provided with a guide groove, a sliding plate passing through the guide groove is fixedly arranged on the positioning plate, a baffle is fixedly arranged on the top of the sliding plate, the baffle is slidably arranged on the limit plate, the width of the baffle is greater than the width of the guide groove, a vibration motor is fixedly arranged on the limit plate, and the driving end of the vibration motor is fixed to the baffle.

[0024] A blast furnace granulated slag powder production line comprises the above-mentioned screening and feeding device, and also comprises a discharging mechanism arranged at the bottom of each collecting box, for discharging the slag particles collected in the collecting box.

[0025] Beneficial effects of the present invention:

[0026] (1) The present invention firstly puts the slag particles into the first screening area, the diameter of the sieve holes in the first screening area is the smallest, and the slag particles with the smallest particle size can be obtained during the screening process. After the screening is completed, the screening drum can be driven to rotate by the rotating module to rotate the second screening area to the screening position, and then the slag particles are screened through the sieve holes in the second screening area, the aperture of the sieve holes in the second screening area is larger than the aperture of the sieve holes in the first screening area. After the screening is completed, the rotating module drives the screening drum to continue to rotate to rotate the third screening area to the screening position, and the slag particles are screened through the sieve holes in the third screening area. The slag particles are screened, the aperture of the sieve holes in the third screening zone is larger than the aperture of the sieve holes in the second screening zone, and after the second screening is completed, the rotating module drives the fourth screening zone to rotate to the screening position, and all the remaining slag particles can be directly discharged from the discharge chute. After multi-stage screening, the present invention can obtain slag particles of four different particle sizes. Compared with the prior art that requires the use of drum screens or rotary screens with different apertures to screen the slag particles, the present invention only needs to use one screening drum to achieve four-stage screening, and only needs to be loaded once in the whole process, which effectively improves the screening efficiency;

[0027] (2) After the first carrying basket of the present invention enters the screening drum, the bottom of the first carrying basket is slidably fitted with the inner wall of the screening drum, thereby confining the slag particles in the first carrying basket. Even if the screening drum rotates, the slag particles will be confined in the first carrying basket because the bottom of the first carrying basket is fitted with the inner wall of the screening drum. During the screening process, the two side plates of the first carrying basket are just at the junction of two groups of adjacent screening areas, and the slag particles will not be discharged from the sieve holes of other screening areas.

[0028] (3) In the present invention, when the translation module drives the first carrying basket to move into the screening drum for screening, the second carrying basket is located outside the screening drum at this time, and slag particles can be fed. Correspondingly, when the screening is completed, the translation module drives the first carrying basket to move out of the screening drum, and the second carrying basket can be driven by the connecting frame to move into the screening drum for screening. The two can alternately perform screening and feeding. Compared with setting up a group of carrying baskets, the screening efficiency is higher; at the same time, when a group of screening areas is screened, the first drive module drives the collection box to switch, and the first rack can synchronously drive the gear ring to rotate. The gear ring synchronously drives the screening drum to rotate during the rotation process, thereby realizing the switching of the screening areas. There is no need to use other servo drive equipment to drive the screening drum to rotate. The screening areas can be switched synchronously with the collection box, and the stability is higher.

[0029] (4) In the initial state of the present invention, the feed trough on the feed roller faces one side of the material storage box. At this time, the slag particles in the material storage box can be discharged into the feed trough under the action of gravity. When the carrying basket moves to the bottom of the discharge box, the feed roller can be driven to rotate by the rotating module so that the feed trough faces one side of the discharge box. The slag particles in the feed trough can be discharged into the carrying basket under the action of gravity. After the discharge is completed, the feed roller can be driven to reset by the rotating module. The volume of the feed trough in the present invention is fixed, so that when feeding, the amount of slag material transported to the carrying basket each time is also fixed, thereby achieving the effect of equal amount of feeding.

[0030] (5) The present invention can not only perform four-stage screening on slag particles, but also, when it is necessary to perform two-stage or three-stage screening on slag particles, it can be achieved by reversely rotating the screening drum. Compared with the screening method using multiple-stage screen plates in the prior art, when changing the number of screening stages, the screen plates need to be disassembled and assembled, and the process is relatively cumbersome. The screening adjustment method of the present invention is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 It is a structural schematic diagram of a screening and feeding device of the present invention;

[0033] Figure 2 It is a structural schematic diagram of a screening drum in a screening feeding device of the present invention;

[0034] Figure 3 It is a schematic diagram of the cross-section structure of a screening drum in a screening and feeding device of the present invention;

[0035] Figure 4 It is a structural schematic diagram of a feeding cylinder in a screening feeding device of the present invention;

[0036] Figure 5It is a structural schematic diagram of the screening area division in a screening feeding device of the present invention;

[0037] Figure 6 It is a structural schematic diagram of a sieve hole in a screening and feeding device of the present invention;

[0038] Figure 7 The structure of the feeding roller in the screening feeding device of the present invention is shown in FIG. Figure 1 ;

[0039] Figure 8 The structure of the feeding roller in the screening feeding device of the present invention is shown in FIG. Figure 2 ;

[0040] Fig. 9 It is a structural schematic diagram of a sealing cover in a screening and feeding device of the present invention;

[0041] Fig.10 It is a structural schematic diagram of a carrying basket in a screening feeding device of the present invention moving into a screening drum.

[0042] In the figure: 1, screening cylinder; 2, storage box; 3, first carrying basket; 4, collecting box; 5, sealing cover; 6, discharge box; 7, feeding roller; 101, positioning cylinder; 102, limiting frame; 201, sliding plate; 202, vibration motor; 203, feeding cylinder; 204, second driving module; 205, limiting plate; 206, guide groove; 207, positioning plate; 208, baffle; 209, connecting frame; 301, second carrying basket; 302, gear ring; 303, arc sealing plate; 304, guide plate; 305, second guide rod; 306, third spring; 307, The first screening section; 308, the second screening section; 309, the third screening section; 310, the fourth screening section; 311, the sieve holes; 312, the discharge chute; 401, the first driving module; 402, the first rack; 501, the reserved slot; 601, the first guide rod; 602, the second spring; 603, the closing plate; 604, the gear; 605, the second rack; 606, the limit seat; 607, the support rod; 608, the first spring; 609, the adjustment frame; 610, the linear guide frame; 611, the inclined guide frame; 612, the guide wheel; 613, the movable plate; 701, the feed chute. DETAILED DESCRIPTION

[0043] 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.

[0044] Example 1

[0045] See also Figure 1 and Figure 5 As shown, the present invention is a screening feeding device, including a screening drum 1, both ends of the screening drum 1 are provided with openings, and the drum wall of the screening drum 1 is circumferentially divided into a first screening zone 307, a second screening zone 308, a third screening zone 309 and a fourth screening zone 310; specifically, the ranges defined by the first screening zone 307, the second screening zone 308, the third screening zone 309 and the fourth screening zone 310 respectively occupy one quarter of the drum wall.

[0046] In this embodiment, sieve holes 311 are evenly opened on the cylinder walls corresponding to the first screening zone 307, the second screening zone 308 and the third screening zone 309, and a discharge trough 312 is opened on the cylinder wall corresponding to the fourth screening zone 310. The apertures of the sieve holes 311 opened in the first screening zone 307, the second screening zone 308 and the third screening zone 309 gradually increase; specifically, in this embodiment, the apertures of the sieve holes 311 opened in different screening zones are different in size, so as to facilitate the graded screening of slag particles.

[0047] See also Figure 1-Figure 3 , further comprising a first carrying basket 3 for conveying slag powder into the screening drum 1, the first carrying basket 3 being connected to a translation module driving it to move toward or away from the screening drum 1, the bottom of the first carrying basket 3 being arranged in an arc-shaped structure for slidingly fitting with the inner wall of the screening drum 1, an arc-shaped sealing plate 303 being slidingly provided at the bottom opening end of the first carrying basket 3, the arc-shaped sealing plate 303 being connected to a first elastic portion arranged on the side wall of the first carrying basket 3; specifically, in the initial state, the first carrying basket 3 is located outside the screening drum 1, and the arc-shaped sealing plate 303 is in contact with the first The bottom opening of the carrying basket 3 is in a sealed state, and the slag particles to be screened can be put into the first carrying basket 3. After the putting is completed, the first carrying basket 3 is driven by the translation module to move toward the screening drum 1. During the movement, the arc-shaped sealing plate 303 first abuts against the wall of the screening drum 1. As the first carrying basket 3 continues to move, the arc-shaped sealing plate 303 cannot move due to the limiting effect. At this time, the first elastic part contracts to generate elastic force, and the slag particles in the first carrying basket 3 can be discharged from its bottom opening into the screening drum 1 for subsequent screening.

[0048] Correspondingly, after screening is completed, the first carrier basket 3 can be pulled out of the screening cylinder 1 by the translation module, and the first elastic part can drive the arc-shaped sealing plate 303 to close the bottom opening of the first carrier basket 3 again, so that material can be added again, and so on.

[0049] As a further solution of this embodiment, a rotating module is further arranged on one side of the screening drum 1, and the rotating module is used to drive the screening drum 1 to rotate; specifically, when driving the screening drum 1 to rotate, the rotating module can rotate 90 degrees each time.

[0050] See also Figure 5 When the screening drum 1 screens the slag particles, the slag particles are first put into the first screening zone 307. The diameter of the sieve hole 311 in the first screening zone 307 is the smallest. During the screening process, slag particles with the smallest particle size can be obtained. After the screening is completed, the screening drum 1 can be driven to rotate by the rotating module to rotate the second screening zone 308 to the screening position, and then the slag particles are screened by the sieve holes 311 in the second screening zone 308. The aperture of the sieve hole 311 in the second screening zone 308 is larger than the aperture of the sieve hole 311 in the first screening zone 307. Correspondingly, after the screening is completed, the rotating module drives the screening drum 1 to continue to rotate to rotate the third screening zone 309 to the screening position. The sieve holes 311 in the third screening zone 309 screen the slag particles. The aperture of the sieve holes 311 in the third screening zone 309 is larger than the aperture of the sieve holes 311 in the second screening zone 308. After the second screening is completed, the rotating module drives the fourth screening zone 310 to rotate to the screening position. At this time, all the remaining slag particles can be directly discharged from the discharge trough 312. After multi-stage screening, this embodiment can obtain four slag particles with different particle sizes. Compared with the prior art that requires the use of drum screens or rotary screens with different apertures to screen the slag particles, this embodiment only needs to use one screening drum 1 to achieve four-stage screening, and only one feeding is required for the whole process, which effectively improves the screening efficiency.

[0051] It should also be noted that after the first carrying basket 3 of this embodiment enters the screening drum 1, the bottom of the first carrying basket 3 is slidably fitted with the inner wall of the screening drum 1, thereby confining the slag particles in the first carrying basket 3. Even if the screening drum 1 rotates, the bottom of the first carrying basket 3 is fitted with the inner wall of the screening drum 1 (see Fig.10 ), then the slag particles will also be confined in the first carrying basket 3. During the screening process, the two side plates of the first carrying basket 3 are just at the junction of two sets of adjacent screening areas, and the slag particles will not be discharged from the sieve holes 311 of other screening areas;

[0052] In addition, this embodiment does not limit the number of screening zones, so long as the actual grading and screening requirements of slag particles are met.

[0053] Furthermore, the present embodiment can not only perform four-stage screening on the slag particles, but also, when it is necessary to perform two-stage or three-stage screening on the slag particles, it can be achieved by reversely rotating the screening drum 1. Compared with the screening method using multiple-stage screen plates in the prior art, when changing the number of screening stages, the screen plates need to be disassembled and assembled, and the process is relatively cumbersome. The screening adjustment method of the present embodiment is more convenient.

[0054] Example 2

[0055] Based on Example 1, please refer to Figure 1-Figure 3 A second transport basket 301 is also provided on one side of the screening drum 1. The second transport basket 301 has the same structure and size as the first transport basket 3, and the two are fixed by a connecting frame 209. It should be noted that when the translation module drives the first transport basket 3 to move into the screening drum 1 for screening, the second transport basket 301 is located outside the screening drum 1 at this time, and slag particles can be fed. Correspondingly, when the screening is completed, the translation module drives the first transport basket 3 to move out of the screening drum 1, and the second transport basket 301 can be driven by the connecting frame 209 to move into the screening drum 1 for screening. The two can alternately perform screening and feeding. Compared with setting up a group of transport baskets, the screening efficiency is higher.

[0056] For details, please refer to Figure 1 Four groups of connected collecting boxes 4 are provided at the bottom of the screening drum 1, and the collecting boxes 4 are connected to a first driving module 401 for driving them to reciprocate with the bottom of the screening drum 1; specifically, in this embodiment, by providing four groups of collecting boxes 4, four groups of slag particles of different particle sizes screened by the screening drum 1 can be respectively collected. Accordingly, during collection, the bottom of the corresponding collecting box 4 can be driven to move to the bottom of the screening drum 1 by the first driving module 401.

[0057] Accordingly, in order to achieve secondary or tertiary screening, the present embodiment may provide multiple groups of collecting boxes 4 so as to collect the discharged slag particles when the screening drum 1 rotates in the reverse direction.

[0058] As a further solution of this embodiment, please refer to Figure 1-Figure 2 as well as Figure 6 , first racks 402 are fixedly arranged on both sides of the collecting box 4, wherein gear rings 302 for meshing with the first racks 402 are fixed on both sides of the wall of the screening drum 1; it can be explained that when a group of screening zones is screened, the first driving module 401 drives the collecting box 4 to switch while the first rack 402 can synchronously drive the gear ring 302 to rotate, and the gear ring 302 synchronously drives the screening drum 1 to rotate during the rotation, thereby realizing the switching of the screening zones. This embodiment does not require the use of other servo drive devices to drive the screening drum 1 to rotate, and the screening zones can be switched synchronously with the collecting box 4, with higher stability.

[0059] In this embodiment, please refer to Figure 1-Figure 2 In order to achieve the effect of automatically adding slag particles to the first carrying basket 3 and the second carrying basket 301, please refer to Figure 1, storage boxes 2 are symmetrically arranged on both sides of the screening drum 1, and the storage boxes 2 on both sides are fixed by limiting plates 205. A discharge box 6 is provided at the bottom of the storage box 2, and a quantitative feeding module is provided between the discharge box 6 and the storage box 2, so as to quantitatively transport the slag particles in the storage box 2 to the discharge box 6; it can be explained that, in this embodiment, the slag particles to be screened can be firstly transmitted to the storage box 2 via a conveyor, and when the carrying basket moves to the bottom of the discharge box 6, the quantitative feeding module discharges an equal amount of slag particles into the carrying basket, thereby realizing the effect of automatic loading.

[0060] For details, please refer to Figure 2 and Figure 4 as well as Figure 7-Figure 8 The quantitative feeding module includes a feeding cylinder 203 fixedly arranged between the discharge box 6 and the storage box 2, a feeding roller 7 is rotatably arranged in the feeding cylinder 203, the roller wall of the feeding roller 7 is in rolling contact with the cylinder wall of the feeding cylinder 203, and a feeding trough 701 for conveying slag particles is provided on the roller wall of the feeding roller 7, wherein a rotating module is provided on the outer side of the feeding cylinder 203, and the rotating module is used to drive the feeding roller 7 to rotate; it can be explained that in the initial state, the feeding trough 701 on the feeding roller 7 faces one side of the storage box 2, at this time, the slag particles in the storage box 2 can be discharged into the feeding trough 701 under the action of gravity (see Figure 7 ), when the carrying basket moves to the bottom of the discharge box 6, the feeding roller 7 can be driven to rotate by the rotating module so that the feeding trough 701 faces one side of the discharge box 6, and the slag particles in the feeding trough 701 can be discharged into the carrying basket under the action of gravity (see Figure 8 ), after the discharge is completed, the feeding roller 7 can be reset by driving the rotating module. In this embodiment, the volume of the feeding trough 701 is constant, so that when feeding, the amount of slag material transported to the carrying basket each time is also constant, thereby achieving the effect of equal amount of feeding.

[0061] In this embodiment, please refer to Figure 4, the rotating module includes a gear 604 rotatably arranged on the outside of the feeding cylinder 203, the gear 604 is fixed to the feeding roller 7, and second racks 605 meshing therewith are arranged in parallel on both sides of the gear 604, and the ends of the second racks 605 on both sides that are away from each other are fixed to the adjusting frame 609 through a support rod 607, and a limit seat 606 is correspondingly fixed on the cylinder wall of the feeding cylinder 203, and the support rod 607 is slidably inserted in the limit seat 606, and a first spring 608 is provided on the support rod 607, one end of the first spring 608 is fixed to the limit seat 606, and the other end is fixed to the adjusting frame 609, and the bottom of the adjusting frames 609 on both sides are fixed to the linear guide 610, and the linear guides 610 on both sides are parallel to each other, and the ends of the linear guides 610 on both sides that are close to the screening cylinder 1 are fixed to the inclined guide 611, and the inclined guides 611 on both sides are inclined toward the side away from each other, wherein the first carrying basket 3 is fixed with a first spring 608, and the first spring 608 is fixed with a first spring 608, and the first spring 608 is fixed with a first spring 608, and the first spring 608 is fixed with a first spring 610, and the first spring 610 ...10, and the first spring 610 is fixed with a first spring 610, and the first spring 610 is fixed with a first spring 610, and the first spring 61 The guide wheels 612 are rotatably arranged at both ends of the second carrying basket 301; it can be explained that in the initial state, based on the setting of the first spring 608, the gear 604 can be limited by the second rack 605, so that the feeding trough 701 of the feeding roller 7 is toward one side of the storage box 2, and as the carrying basket moves toward the bottom of the discharge box 6, the guide wheel 612 of the carrying basket first abuts against the inclined guide frame 611, and under the limiting effect, the inclined guide frames 611 on both sides can be driven away from each other until the guide wheel 612 moves to the linear guide frame 610 and stops. In the process of moving away from each other, the inclined guide frames 611 can drive the second racks 605 on both sides to move away from each other through the adjusting frame 609 and the support rod 607, thereby driving the gear 604 and the feeding roller 7 to rotate 180 degrees. Correspondingly, when the carrying basket moves in the direction away from the discharge box 6, the first spring 608 can drive each component to reset under the action of elastic force.

[0062] See also Figure 2-Figure 4Furthermore, during the rotation of the feeding roller 7, in order to prevent the material in the feeding trough 701 from leaking due to the carrying basket not reaching the bottom of the discharge box 6, in this embodiment, a closing plate 603 is slidably arranged at the bottom of the discharge box 6, and a movable plate 613 is fixedly arranged on the closing plate 603, wherein a first guide rod 601 slidably plugged with the movable plate 613 is fixedly arranged on the outer side of the feeding cylinder 203, and a second spring 602 is arranged on the first guide rod 601, one end of the second spring 602 is fixed to the movable plate 613, and the other end is fixed to the end of the first guide rod 601; it can be explained that in the initial state, the closing plate 603 is located in the discharge box 6 bottom, in order to close the bottom opening of the discharge box 6, when the carrying basket moves toward the bottom of the discharge box 6, the carrying basket first abuts against the closing plate 603, as the carrying basket continues to move, the closing plate 603 can be pushed to slide in the direction away from the screening drum 1, and the closing plate 603 compresses the second spring 602 through the movable plate 613 and generates elastic force, thereby achieving the effect of gradually opening the bottom opening of the discharge box 6, even if the material in the feed trough 701 leaks, it can also be directly discharged into the carrying basket, accordingly, as the carrying basket moves in the direction close to the screening drum 1, the second spring 602 can gradually drive the closing plate 603 to reset the seal.

[0063] In this embodiment, the first elastic portion includes a guide plate 304 fixedly arranged on one side of the arc-shaped sealing plate 303, and the outer sides of the first carrying basket 3 and the second carrying basket 301 are fixedly provided with a second guide rod 305 slidably plugged with the guide plate 304, and the second guide rod 305 is provided with a third spring 306; specifically, one end of the third spring 306 is fixed to the guide plate 304, and the other end is fixed to the end of the second guide rod 305; it can be explained that when the arc-shaped sealing plate 303 and the carrying basket are misaligned, the arc-shaped sealing plate 303 compresses the third spring 306 through the guide plate 304, so as to be used for subsequent driving of the arc-shaped sealing plate 303 to reset.

[0064] In order to position the screening drum 1, in this embodiment, please refer to Figure 2 , Figure 8-Figure 10At least three groups of positioning cylinders 101 are arranged in a circumferential array in the screening cylinder 1. The positioning cylinders 101 are in rolling contact with the inner wall of the screening cylinder 1. The two ends of the positioning cylinder 101 are respectively connected to the limiting frames 102 for rotation. The tops of the limiting frames 102 are fixed to the positioning plates 207. Among them, the limiting plates 205 are provided with guide grooves 206, and the positioning plates 207 are fixedly provided with sliding plates 201 that penetrate the guide grooves 206. The top of the sliding plates 201 is fixedly provided with baffles 208, and the baffles 208 are slidably arranged on the limiting plates 205. The width of the baffles 208 is greater than the width of the guide grooves 206. A vibration motor 202 is fixedly arranged on the limit plate 205, and the driving end of the vibration motor 202 is fixed to the baffle 208; it can be explained that, in this embodiment, the screening drum 1 can be supported and positioned through three groups of positioning cylinders 101, and the screening drum 1 can be limited to the limit frames 102 on both sides. During the screening process, the baffle 208 can be driven by the vibration motor 202 to slide on the limit plate 205, and the baffle 208 drives the limit frames 102 on both sides to reciprocate through the sliding plate 201, thereby synchronously driving the screening drum 1 to vibrate, thereby improving the screening efficiency.

[0065] In addition, during the screening process, in order to ensure that the first rack 402 is always meshed with the gear ring 302, the tooth width of the first rack 402 is greater than the tooth width of the gear ring 302, so that the two can always mesh when the screening drum 1 reciprocates.

[0066] Furthermore, during the screening process, in order to reduce noise, a sealing cover 5 is fixedly arranged at the bottom of the positioning plate 207, and a reserved groove 501 corresponding to the screening area is opened at the bottom of the sealing cover 5; specifically, during screening, each group of screening areas corresponds to the reserved groove 501, and other screening areas are sealed by the sealing cover 5 to reduce the transmission of noise.

[0067] The translation module includes a second driving module 204 fixedly arranged between the two groups of feeding cylinders 203, and the driving end of the second driving module 204 is fixed to the limiting plate 205;

[0068] Specifically, the first driving module 401 and the second driving module 204 of this embodiment may adopt a screw-nut transmission mechanism or a synchronous belt transmission mechanism, which is not limited in this embodiment, as long as the driving connection component can be reciprocated along a straight line.

[0069] A screening method for a screening feeding device comprises the following steps:

[0070] See also Figure 1-Figure 3 as well as Figure 5 , S1, putting the slag particles to be screened into the first carrying basket 3;

[0071] S2, the translation module drives the first carrying basket 3 to move toward the screening drum 1. During the movement, the arc-shaped sealing plate 303 first abuts against the wall of the screening drum 1, and the slag particles in the first carrying basket 3 can be discharged into the screening drum 1 through the bottom opening thereof;

[0072] S3, slag particles are screened in the first screening area 307;

[0073] S4, after the screening is completed, the screening drum 1 is driven to rotate by the rotating module to rotate the second screening section 308 to the screening position, and the slag particles are screened through the sieve holes 311 in the second screening section 308;

[0074] S5. After the screening is completed, the rotating module drives the screening drum 1 to continue rotating, so as to rotate the third screening section 309 to the screening position, and screen the slag particles through the sieve holes 311 in the third screening section 309;

[0075] S6. After the screening is completed, the rotating module drives the fourth screening section 310 to rotate to the screening position, and all the remaining slag particles can be directly discharged from the discharge chute 312.

[0076] A blast furnace granulated slag powder production line includes the above-mentioned screening and feeding device, and also includes a discharge mechanism opened at the bottom of each collecting box 4, which is used to discharge the slag particles collected in the collecting box 4; specifically, when a certain amount of slag particles in the collecting box 4 is collected, the slag can be discharged through the discharge mechanism, and the discharge mechanism includes an electrically controlled valve for controlling the discharge.

[0077] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A screening feeding device, comprising a screening drum (1), characterized in that: The wall of the screening cylinder (1) is divided into a first screening section (307), a second screening section (308), a third screening section (309) and a fourth screening section (310) in the circumferential direction; the walls corresponding to the first screening section (307), the second screening section (308) and the third screening section (309) are evenly provided with screening holes (311), the wall corresponding to the fourth screening section (310) is provided with a discharge groove (312), and the apertures of the screening holes (311) provided in the first screening section (307), the second screening section (308) and the third screening section (309) are gradually increased; It also comprises a first transport basket (3) for conveying slag powder into the screening drum (1), the first transport basket (3) being connected to a translation module for driving it to move towards or away from the screening drum (1), the bottom of the first transport basket (3) being arranged in an arc-shaped structure for slidingly fitting with the inner wall of the screening drum (1), the bottom opening end of the first transport basket (3) being slidably provided with an arc-shaped sealing plate (303), the arc-shaped sealing plate (303) being connected to a first elastic portion arranged on the side wall of the first transport basket (3); Wherein, a rotating module is also arranged on one side of the screening drum (1), and the rotating module is used to drive the screening drum (1) to rotate.

2. A screening feeding device according to claim 1, characterized in that: A second carrying basket (301) is also provided on one side of the screening drum (1); the second carrying basket (301) has the same structure and size as the first carrying basket (3), and the two are fixed by a connecting frame (209).

3. A screening feeding device according to claim 1, characterized in that: Four groups of connected collecting boxes (4) are provided at the bottom of the screening drum (1), and the collecting boxes (4) are connected to a first driving module (401) that drives them to reciprocate with the bottom of the screening drum (1).

4. A screening feeding device according to claim 3, characterized in that: First racks (402) are fixedly arranged on both sides of the collection box (4); Wherein, toothed rings (302) for meshing with the first rack (402) are respectively fixed on both sides of the wall of the screening drum (1).

5. A screening feeding device according to claim 1, characterized in that: Storage boxes (2) are symmetrically arranged on both sides of the screening drum (1), the storage boxes (2) on both sides are fixed by limiting plates (205), a discharge box (6) is provided at the bottom of the storage box (2), and a quantitative feeding module is provided between the discharge box (6) and the storage box (2) for quantitatively conveying slag particles in the storage box (2) to the discharge box (6).

6. A screening feeding device according to claim 5, characterized in that: The quantitative feeding module comprises a feeding cylinder (203) fixedly arranged between a discharge box (6) and a storage box (2), a feeding roller (7) rotatably arranged in the feeding cylinder (203), a roller wall of the feeding roller (7) rollingly fitting with a cylinder wall of the feeding cylinder (203), and a feeding trough (701) for conveying slag particles is provided on the roller wall of the feeding roller (7); Wherein, a rotating module is provided on the outside of the feeding cylinder (203), and the rotating module is used to drive the feeding roller (7) to rotate.

7. A screening feeding device according to claim 3, characterized in that: The rotating module comprises a gear (604) rotatably arranged on the outside of the feeding cylinder (203), the gear (604) is fixed to the feeding roller (7), and second racks (605) meshing with the gears are arranged in parallel on both sides of the gear (604), and the ends of the second racks (605) on both sides that are away from each other are fixed to the adjustment frame (609) through a support rod (607), and a limit seat (606) is fixedly arranged on the cylinder wall of the feeding cylinder (203), the support rod (607) is slidably inserted in the limit seat (606), and a first spring (608) is provided on the support rod (607), and the bottoms of the adjustment frames (609) on both sides are fixed to the linear guide frame (610), and the ends of the linear guide frames (610) on both sides that are close to the screening cylinder (1) are fixed to the inclined guide frame (611), and the inclined guide frames (611) on both sides are inclined toward the side away from each other; Wherein, guide wheels (612) are rotatably arranged at both ends of the first carrying basket (3) and the second carrying basket (301).

8. A screening feeding device according to claim 6, characterized in that: A closing plate (603) is slidably arranged at the bottom of the discharge box (6), and a movable plate (613) is fixedly arranged on the closing plate (603); Wherein, a first guide rod (601) slidably plugged with the movable plate (613) is fixedly arranged on the outer side of the feeding cylinder (203), and a second spring (602) is arranged on the first guide rod (601).

9. A screening feeding device according to claim 5, characterized in that: At least three groups of positioning cylinders (101) are arranged in a circumferential array in the screening cylinder (1), the positioning cylinders (101) are in rolling contact with the inner wall of the screening cylinder (1), the two ends of the positioning cylinders (101) are respectively rotatably connected to the limiting frames (102), and the top of each limiting frame (102) is fixed to the positioning plate (207); The limiting plate (205) is provided with a guide groove (206), a sliding plate (201) penetrating the guide groove (206) is fixedly arranged on the positioning plate (207), a baffle (208) is fixedly arranged on the top of the sliding plate (201), the baffle (208) is slidably arranged on the limiting plate (205), the width of the baffle (208) is greater than the width of the guide groove (206), a vibration motor (202) is fixedly arranged on the limiting plate (205), and the driving end of the vibration motor (202) is fixed to the baffle (208).

10. A blast furnace granulated slag powder production line, characterized in that: It comprises a screening feeding device as claimed in any one of claims 1 to 9, and also comprises a discharge mechanism opened at the bottom of each collecting box (4) for discharging the slag particles collected in the collecting box (4).

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