Crushing device for primary reduction of reduced iron powder

Abstract

The utility model provides a crushing device for primary reduction of reduced iron powder, which is provided with a feed port, a primary crushing structure and a secondary crushing area, and the whole gap among a plurality of primary crushing rollers in the primary crushing structure is larger than the gap among a plurality of crushing rollers in the secondary crushing area. The raw materials entering from the feeding port can be crushed in sequence, the effect of crushing the raw materials is achieved, meanwhile, a uniform filter screen is arranged below the secondary crushing area, screening is achieved through a reciprocating material pushing structure, and in the process, the ore raw materials meeting the standard can enter a material receiving cavity through a screen mesh; ores which do not meet the standard are blocked on the screen and driven by the push plate to enter the feeding spirals located on the two sides respectively, the crushing effect is good when the ores are fed into the secondary crushing area again through the feeding spirals to be crushed, resource utilization is optimized, meanwhile, manpower input is reduced, and working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of reduced iron powder, especially relates to the reducing iron powder primary reduction is with the rubbing crusher. BACKGROUND

[0002] The primary reduced iron powder is a pig iron product produced by direct reduction method, which involves reducing iron ore into sponge iron under the condition of lower than melting temperature; in this reduction process, the iron ore is the raw material of the primary reduced iron powder, and because the volume of the iron ore is uneven during mining, it needs to be crushed first.

[0003] The existing technology generally adopts single crushing workmanship to crush the iron ore, that is, the iron ore is sequentially passed through crushing rollers with different gaps, so that the iron ore is extruded between the crushing rollers to achieve the crushing effect, and then manual screening is carried out to screen out the iron ore that does not meet the standard for subsequent processing, but this workmanship still needs manual screening after crushing, which requires a large amount of manpower and has low efficiency. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] The utility model provides a rubbing crusher for primary reduction of reduced iron powder, which comprises a feeding port for feeding raw materials, a primary crushing structure and a secondary crushing zone located below the feeding port, and a uniform filter screen located below the secondary crushing zone, a reciprocating pushing structure is arranged between the secondary crushing zone and the uniform filter screen, a push plate capable of reciprocating motion is arranged on one end of the reciprocating pushing structure away from the rubbing crusher, a bottom feeding port is formed at the farthest end position and the nearest end position of the movement track of the push plate, one feeding screw and the lowest end of one bottom feeding port are connected, one second feeding screw and the lowest end of the other bottom feeding port are connected, the top end faces of the second feeding screw and the feeding screw are located on the same horizontal plane, a secondary feeding outlet for discharging is arranged on the side end of the second feeding screw closest to the secondary crushing zone, and another secondary feeding outlet corresponding to the secondary feeding outlet is arranged on the side end of the feeding screw closest to the secondary crushing zone; the reciprocating pushing of the push plate can separate the crushed materials into the receiving cavity or re-feed them into the secondary crushing zone.

[0006] The reciprocating pushing structure has a fixed frame, side fixed columns consistent with the length of the inner wall of the fixed frame are installed in the fixed frame, a same turning plate is connected to the ends of the two side fixed columns and is slidable, reset springs are respectively sleeved on each side fixed column between the fixed frame and the turning plate, a central shaft is arranged between the two side fixed columns and in the fixed frame, a reciprocating track is arranged on the surface of the central shaft, and a moving column is transmissionally connected between the reciprocating track and the turning plate; the end of the central shaft away from the turning plate is connected with a driving motor through a transmission column, and the end of the turning plate away from the driving motor is connected with a push plate through a connecting column.

[0007] The reciprocating track is a continuous wave shape with periodicity, and when the moving column moves in the reciprocating track for one period, the push plate completes one movement period from far to near or from near to far.

[0008] The bottom end of the push plate contacts the upper end surface of the uniform filter screen, and when the moving column is located at the farthest end of the reciprocating track, the push plate is located at the end of the uniform filter screen away from the reciprocating pushing structure; when the moving column is located at the nearest end of the reciprocating track, the push plate is located at the end of the uniform filter screen close to the reciprocating pushing structure.

[0009] A bottom inlet is arranged on the wall of the corresponding crushing device at the position of the push plate at the farthest end, and another bottom inlet is arranged on the wall of the corresponding crushing device at the position of the push plate at the nearest end, and when the push plate reciprocates, the material can enter the feeding screw or the second feeding screw through the two bottom inlets.

[0010] The lowest end of the feeding screw and the bottom end of the bottom inlet close to the feeding screw are connected through a sliding slope; the lowest end of the second feeding screw and the bottom end of the bottom inlet close to the second feeding screw are connected through another sliding slope; and the slopes of the two sliding slopes are matched with the distances of the positions thereof, respectively.

[0011] The one-side crushing structure has a plurality of primary crushing rollers, irregular teeth are arranged on the outer wall of each primary crushing roller, and the length of the teeth is consistent with the length of the primary crushing roller.

[0012] The secondary crushing area has a central crushing area and two side crushing areas, and the gap between the two crushing rollers in the central crushing area is greater than the gap between the two crushing rollers in the two side crushing areas.

[0013] Compared with the prior art, the reciprocating pushing structure has the following beneficial effects:

[0014] 1. The utility model discloses a first crushing structure and secondary crushing area are set up, the gap between multiple primary crushing rollers in the first crushing structure is larger than the gap between multiple crushing rollers in the secondary crushing area, and the raw materials entering through the feeding port can be sequentially crushed to achieve the effect of crushing the raw materials.

[0015] 2. The secondary crushing area is divided into a central crushing area and two side crushing areas, the gap between the crushing rollers in the central crushing area is larger than the gap between the crushing rollers in the two side crushing areas, and a feeding inclined plate is additionally arranged between the first crushing structure and the secondary crushing area, so that the crushed materials from the first crushing structure can directly enter the central crushing area, and the raw materials re-entering the secondary crushing area through the feeding screw can enter the two side crushing areas, so that the work has a progressive level, and the problem of slow crushing efficiency and serious roller wear caused by the direct contact of large-size raw materials with small-gap crushing rollers is avoided.

[0016] 3. The utility model separates the crushing process into three levels, the first level is to crush the raw materials through the first crushing structure, at this time, the large-size raw materials are crushed into small-size raw materials for the first time; the second level is to convey the small-size raw materials into the central crushing area through the feeding inclined plate, and the raw materials are crushed again in the central crushing area and then fall into the uniform filter screen; the third level is to separate the standard iron ore pieces from the non-standard iron ore pieces through the uniform filter screen, and the non-standard iron ore pieces are crushed again in the two side crushing areas with small gaps, so that the crushing effect is good, the resource utilization is optimized, the labor input is reduced, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram of the utility model;

[0018] Figure 2 is the structure schematic diagram of the reciprocating pushing structure in the utility model;

[0019] Figure 3 is the A part enlarged structure schematic diagram in the utility model Figure 1 ;

[0020] Figure 4 is the B part enlarged structure schematic diagram in the utility model Figure 1 ;

[0021] Figure 5 is the structure diagram of the feeding screw in the utility model;

[0022] Figure 6 is the appearance structure diagram of the utility model.

[0023] In the figure:

[0024] 1, inlet; 2, primary crushing structure; 3, primary crushing roller; 4, inlet inclined plate; 5, secondary crushing area; 51, central crushing area; 52, two side crushing areas; 6, uniform filter screen; 7, reciprocating pushing structure; 71, fixed frame; 72, connecting column; 73, side fixed column; 74, return spring; 75, central shaft; 76, reciprocating track; 77, turning plate; 78, moving column; 79, push plate; 8, bottom inlet; 9, feeding screw; 10, secondary feeding outlet; 11, supporting leg; 13, receiving cavity; 14, receiving structure; 15, pulling track; 16, sliding slope. DETAILED DESCRIPTION

[0025] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the utility model embodiment will be described clearly and completely below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor should belong to the protection scope of the utility model.

[0026] As shown in the accompanying drawings, Figures 1-6 The reducing iron powder primary reduction crushing device to be protected by the utility model has an inlet 1 for entering raw materials, and raw materials are sent into the device through the inlet 1, and the primary crushing structure 2 and the secondary crushing area 5 are distributed in the device in an up-down manner, the raw materials after being crushed by the primary crushing structure 2 are crushed again in the secondary crushing area 5, the raw materials after secondary crushing fall on the surface of the uniform filter screen 6, the raw materials meeting the particle diameter fall into the receiving cavity 13 through the uniform filter screen 6, and the raw materials not meeting the particle diameter are pushed into the feeding screw 9 and the second feeding screw through the reciprocating pushing structure 7, and the raw materials passing through the feeding screw 9 and the second feeding screw are sent into the secondary crushing area 5 again for secondary crushing, and finally the raw materials meeting the particle diameter are obtained.

[0027] The primary crushing structure 2 is composed of a plurality of primary crushing rollers 3 and is located close to the inlet 1. The plurality of primary crushing rollers 3 are evenly distributed along the long side of the crushing structure. Irregular teeth are integrally formed on the periphery of the primary crushing structure 2. The length of the teeth is consistent with the length of the primary crushing structure 2. The two ends of the primary crushing roller 3 are provided with protruding connecting columns with a diameter smaller than that of the primary crushing roller 3 itself. One of the protruding connecting columns is connected to one side wall a of the crushing device through a bearing, and the other protruding connecting column passes through the other side wall b corresponding to the aforementioned side wall and is connected to a gear located on the other side wall b. The gear located at the outermost edge is driven to rotate by a driving motor, which drives the remaining gears to rotate the plurality of primary crushing rollers 3 in the forward or reverse direction, thereby crushing the raw materials that contact the primary crushing structure 2.

[0028] A secondary crushing area 5 is provided below the primary crushing structure 2. A plurality of crushing rollers are installed in the secondary crushing area 5. The plurality of crushing rollers form a central crushing area 51 located in the central position of the secondary crushing area 5 and two side crushing areas 52 located on both sides of the central crushing area 51. The gap between the two crushing rollers located in the central crushing area 51 is greater than the gap between the two crushing rollers located in the two side crushing areas 52. In order to improve the connection between the primary crushing structure 2 and the secondary crushing area 5 and avoid the problem of increased crushing time caused by the direct contact of large-volume raw materials from the primary crushing structure 2 with the two side crushing areas 52, an inlet inclined plate 4 is provided between the primary crushing structure 2 and the secondary crushing area 5. The number of inlet inclined plates 4 is two and they are oppositely arranged. Each inlet inclined plate 4 is inclined from the position of the inner wall of the crushing device towards the position close to the central crushing area 51. The gap between the two inlet inclined plates 4 is slightly smaller than the total length of the central crushing area 51.

[0029] A uniform filter screen 6 is provided below the secondary crushing area 5 and inside the crushing device. The mesh diameter of the uniform filter screen 6 is the standard particle diameter. A reciprocating pushing structure 7 for oil supply is provided between the uniform filter screen 6 and the secondary crushing area 5 and on one side wall of the crushing device. The front end of the reciprocating pushing structure 7 contacts the uniform filter screen 6 and pushes the raw materials on the uniform filter screen 6. The raw material particles with a particle diameter meeting the standard fall off the uniform filter screen 6, while the raw material particles not meeting the standard particle diameter are pushed into the bottom inlet 8 by the reciprocating reciprocating pushing structure 7 for further crushing.

[0030] The reciprocating pushing structure 7 comprises a fixed frame 71 which is rectangular and is formed by two upper and lower buckles, and has a cavity between the fixed frame 71, and two side edge fixed columns 73 are symmetrically arranged in the cavity, a return spring 74 is sleeved on each side edge fixed column 73, one end of the return spring 74 is fixed on the inner wall of the fixed frame 71, and the other end of the return spring 74 is fixed on the side wall of a turning plate 77 sleeved on the side edge fixed column 73; a center shaft 75 is arranged between the two side edge fixed columns 73, a wave-shaped reciprocating track 76 is arranged on the center shaft 75, and a moving column 78 is slidably connected in the reciprocating track 76, the upper end of the moving column 78 is connected with the upper surface of the turning plate 77 after penetrating through an opening arranged in the center of the surface of the turning plate 77, a hole is arranged in the center of the inner wall of the fixed frame 71 away from the turning plate 77, and the transmission column arranged on the outer side wall of the center shaft 75 penetrates through the hole and is connected with the output end of the driving motor arranged on the outer wall of the fixed frame 71.

[0031] Two connecting columns 72 are symmetrically arranged on the end surface of the turning plate 77 away from the return spring 74, the front ends of the two connecting columns 72 penetrate through the side wall of the fixed frame 71 and are connected with the push plate 12 arranged on the outer side of the fixed frame 71, when the output end of the driving motor drives the center shaft 75 to rotate through the transmission column, the moving column 78 moves along the reciprocating track 76 in the forward and backward state under the rotation of the center shaft 75, the turning plate 77 converts the circular motion of the center shaft 75 into displacement motion, when the moving column 78 moves from the position close to the transmission column to the position away from the transmission column, the turning plate 77 moves towards the position away from the transmission column, the return spring 74 is stretched along with the extension of the moving column 78, and the push plate 12 extends to the farthest end, when the moving track of the moving column 78 is from the position close to the transmission column to the position away from the transmission column, the turning plate 77 moves towards the position close to the transmission column, the return spring 74 is compressed between the turning plate 77 and the inner wall of the fixed frame 71, and the push plate 12 reaches the nearest end.

[0032] The bottom inlet 8 is arranged on the wall of the crushing structure corresponding to the farthest end position and the nearest end position in the moving track of the push plate 12, and the raw materials are sent into the feeding screw 9 or the second feeding screw through a sliding slope 16, the secondary feeding outlet 10 is arranged at the top of the feeding screw 9 and on the side wall of the crushing structure, and another secondary feeding outlet 10 is arranged at the top of the second feeding screw and on the corresponding surface of the secondary feeding outlet 10, when the device works, the raw materials fed by the feeding screw 9 and the second feeding screw can be crushed again in the secondary crushing area 5 through the secondary feeding outlet 10 corresponding to the farthest end position, and the raw materials can contact the two side crushing areas 52 again in the secondary crushing area 5 to be crushed again until the diameter of the raw material particles reaches the standard.

[0033] A receiving cavity 13 is arranged below the uniform filter screen 6 and in the crushing device, a receiving structure 14 is slidably connected in the receiving cavity 13 through a pulling track 15, the raw material falling into the receiving structure 14 through the uniform filter screen 6 for the user to use, at the same time, a supporting leg 11 of the stabilizing device is arranged at the bottom end of the crushing device, a control box for controlling the intelligent work of the device is arranged on the surface of the crushing device, and a control switch is installed on the control box.

[0034] In use, the device is connected to an external control power supply, the raw material to be crushed is put into the crushing device through the feeding port 1, because the raw material itself has different particle diameters, the particles with slightly larger diameters contact the primary crushing structure 2, and the particles with slightly smaller diameters pass through the primary crushing structure 2 and enter the secondary crushing area 5 through the feeding inclined plate 4, because the gap between the feeding inclined plate 4 corresponds to the central crushing area 51, the raw material passing through the feeding inclined plate 4 is put into the central crushing area 51, at this time, the particles in the primary crushing structure 2 are crushed by the plurality of adjacent primary crushing rollers 3, and the raw material in the secondary crushing area 5 is crushed by the crushing rollers in the plurality of central crushing areas 51; the raw material crushed by the secondary crushing area 5 falls into the uniform filter screen 6 from the secondary crushing area 5, at the same time, the object sensor on the upper end surface of the reciprocating pushing structure 7 detects the falling of the raw material and sends a signal to the PLC, and the PLC controls the driving motor to start rotating.

[0035] The driving motor drives the central shaft 75 to rotate in the fixed frame 71, and the movement column 78 on the central shaft 75 moves along the track of the reciprocating track 76, is limited by the deflection plate 77, and the deflection plate 77 converts the circumferential movement of the movement column 78 into forward and backward movement; when the central shaft 75 moves to the proximal end of the reciprocating track 76, the movement column 78 is driven to the end close to the driving motor, at this time, the deflection plate 77 is simultaneously driven to the position close to the driving motor on the side fixed column 73, and the return spring 74 on the side fixed column 73 is compressed when the deflection plate 77 moves, driving the push plate 12 to move to the end close to the reciprocating pushing structure 7, which is the a end; when the central shaft 75 moves to the distal end of the reciprocating track 76, the movement column 78 is driven to the section away from the driving motor, at this time, the deflection plate 77 is simultaneously driven to the position away from the driving motor on the side fixed column 73, and the return spring 74 resets with the deflection plate 77 away, driving the push plate 12 to move to the end away from the reciprocating pushing structure 7, which is the b end.

[0036] The raw material crushed by the central crushing area 51 has different particle diameters, and when the push plate 12 moves from the a end to the b end, the particles with standard diameters pass through the uniform filter screen 6 into the receiving cavity 13, while the raw material not meeting the standard falls into the bottom inlet 8 opened at the a end or the b end within the moving distance from the a end to the b end, and the material in the bottom inlet 8 enters the feeding screw 9 or the second feeding screw 12 and is sent into the two secondary feeding outlets 10 and then into the two side crushing areas 52 for further crushing; the material after crushing is pushed by the push plate 12 to pass through the screen and enter the receiving structure 14 in the receiving cavity 13, and after the receiving structure 14 is filled, the user pulls out the receiving structure 14 through the pulling track 15 to realize the crushing of the raw material.

[0037] The technical scheme of the utility model, or the technical scheme inspired by the technical scheme of the utility model, designs similar technical schemes to achieve the above technical effects, and falls within the protection scope of the utility model.

Claims

1. A pulverizing device for primary reduction of reduced iron powder, comprising an inlet (1) for feeding raw materials, a primary pulverizing structure (2) located below the inlet (1) and a secondary pulverizing zone (5), and a uniform filter screen (6) located below the secondary pulverizing zone (5), characterized in that, A reciprocating feeding structure (7) is provided between the secondary crushing zone (5) and the uniform filter screen (6). A reciprocating pusher plate (12) is provided on the end of the reciprocating feeding structure (7) that is far away from the crushing device. Bottom feed ports (8) are respectively opened at the farthest end and the closest end of the movement trajectory of the pusher plate (12). A feeding screw (9) is connected to the lowest end of a bottom feed port (8); a second feeding screw is connected to the lowest end of another bottom feed port (8); the second feeding screw The top surface of the feeding screw (9) is on the same horizontal plane. A secondary feeding outlet (10) for discharging material is provided at the top end of the second feeding screw near the secondary crushing zone (5). Another secondary feeding outlet (10) corresponding to the secondary feeding outlet (10) is provided at the top end of the feeding screw (9) near the secondary crushing zone (5). Through the reciprocating push of the push plate (12), the crushed material can be separated into the receiving chamber (13) or re-fed into the secondary crushing zone (5).

2. The pulverizing device for primary reduction of reduced iron powder as described in claim 1, characterized in that: The reciprocating pusher structure (7) has a fixed frame (71), and a side fixed column (73) with the same length as the inner wall of the fixed frame (71) is installed in the fixed frame (71). The two side fixed columns (73) are connected to the same slidable steering plate (77) at one end. A return spring (74) is sleeved between the fixed frame (71) and the steering plate (77) and on each side fixed column (73). A central shaft (75) is set between the two side fixed columns (73) and in the fixed frame (71). A reciprocating track (76) is set on the surface of the central shaft (75). A moving column (78) drives the reciprocating track (76) and the steering plate (77) to connect. The end of the central shaft (75) away from the steering plate (77) is connected to the drive motor through the transmission column. The end of the steering plate (77) away from the drive motor is connected to the push plate (12) through the connecting column (72).

3. The pulverizing device for primary reduction of reduced iron powder as described in claim 2, characterized in that: The reciprocating track (76) is a periodic continuous wave shape. When the moving column (78) moves in a periodic pattern in the reciprocating track (76), the push plate (12) completes a movement cycle from far to near or from near to far.

4. The pulverizing device for primary reduction of reduced iron powder as described in claim 3, characterized in that: The bottom end of the push plate (12) contacts the upper end surface of the uniform filter screen (6). When the moving column (78) is located at the farthest end of the reciprocating track (76), the push plate (12) is located at the end of the uniform filter screen (6) away from the reciprocating pushing structure (7); when the moving column (78) is located at the closest end of the reciprocating track, the push plate (12) is located at the end of the uniform filter screen (6) close to the reciprocating pushing structure (7).

5. The pulverizing device for primary reduction of reduced iron powder as described in any one of claims 2-4, characterized in that: A bottom feed port (8) is provided on the wall of the crushing device corresponding to the position of the farthest push plate (12), and another bottom feed port (8) is provided on the wall of the crushing device corresponding to the position of the nearest push plate (12). When the push plate (12) moves back and forth, the material can enter the feeding screw (9) or the second feeding screw through the two bottom feed ports (8).

6. The pulverizing device for primary reduction of reduced iron powder as described in claim 5, characterized in that: The lowest end of the feeding screw (9) and the bottom end of the bottom inlet (8) adjacent to it are connected by a sliding ramp (16); the lowest end of the second feeding screw and the bottom end of the bottom inlet (8) adjacent to it are connected by another sliding ramp (16); the slopes of the two sliding ramps (16) are respectively matched with the distance between their positions.

7. The pulverizing device for primary reduction of reduced iron powder as described in claim 1, characterized in that: The crushing structure (2) on one side has multiple primary crushing rollers (3). Each primary crushing roller (3) has irregularly shaped teeth on its outer wall. The length of the teeth is the same as the length of the primary crushing roller (3).

8. The pulverizing device for primary reduction of reduced iron powder as described in claim 7, characterized in that: The secondary crushing zone (5) has a central crushing zone (51) and two side crushing zones (52). The gap between the two crushing rollers in the central crushing zone (51) is greater than the gap between the two crushing rollers in the two side crushing zones (52).

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