Granulated blast furnace slag dewatering centrifugal machine

Abstract

The utility model relates to the technical field of granulated blast furnace slag dewatering, in particular to a granulated blast furnace slag dewatering centrifugal machine which comprises a buffering base and a shell installed on the buffering base, the shell comprises a first shell and a second shell, the first shell is communicated with the interior of the second shell, and a screen basket and a scraper assembly are installed in the second shell. The scraper assembly is located in the screening basket, a feeding hopper is fixed to the top of the first shell, the bottom of the feeding hopper is connected with a feeding pipe, the end, away from the feeding hopper, of the feeding pipe is inserted into the screening basket, a driving assembly for driving the scraper assembly and the screening basket to rotate at different rotating speeds is installed on the buffering base, and a discharging pipe is fixed to the bottom of the first shell. When the scraper assembly rotates, filtered slag in the screening basket can be spirally conveyed out of the screening basket, the slag finally falls to the bottom of the first shell and is discharged from a discharging pipe, and water separated from materials is discharged from a water discharging pipe. The device has the technical effects that the granulated slag can be quickly dehydrated on line, and the slag does not need to be stockpiled for water control.

Description

Technical Field

[0001] The utility model relates to the technical field of granulated slag dehydration, in particular to a granulated blast furnace slag dehydration centrifuge. Background Art

[0002] During the reprocessing of granulated blast furnace slag, the moisture content must be reduced to approximately 8% to reduce blast furnace gas and other fuel consumption. After exiting the blast furnace, the slag has an average moisture content of 20%. It is conveyed by belt conveyor into a buffer silo, where it is weighed by a belt scale before being fed into the mill. Initially, traditional water-filtering grate systems were unable to effectively achieve the target moisture content of 8%. The slag was then stored in piles for drying and moisture control, which required a long wait time. Utility Model Content

[0003] The utility model provides a granulated blast furnace slag dewatering centrifuge, which has the technical effect of quickly filtering water from the slag.

[0004] The utility model is a granulated blast furnace slag dewatering centrifuge, which adopts the following technical solutions:

[0005] A granulated blast furnace slag dewatering centrifuge includes a buffer base and a shell installed on the buffer base, the shell includes a first shell and a second shell fixed to one side of the first shell, the first shell is connected to the interior of the second shell, a screen basket and a scraper assembly are installed in the second shell, the scraper assembly is located inside the screen basket, a feed hopper is fixed on the top of the first shell, a feed pipe is connected to the bottom of the feed hopper, the end of the feed pipe away from the feed hopper is inserted into the screen basket, a drive assembly for driving the scraper assembly and the screen basket to rotate at different speeds is installed on the buffer base, a discharge pipe is fixed to the bottom of the first shell, and when the scraper assembly rotates, the slag filtered in the screen basket can be spirally transported out of the screen basket, and the slag eventually falls to the bottom of the first shell and is discharged from the discharge pipe.

[0006] Furthermore, the screen basket includes a circular bottom plate and a first connecting ring, a plurality of keels arranged along the circumferential direction of the bottom plate are fixed between the bottom plate and the first connecting ring, a plurality of screen bars are fixed between the bottom plate and the first connecting ring, the plurality of screen bars are evenly arranged along the circumferential direction of the bottom plate, the screen bars are located on the inner side of the keel, a connecting bar is fixed between two adjacent keels, and the connecting bar is located on the outer side of the screen bar.

[0007] Furthermore, the top surface and the bottom surface of the screen bar are both quadrilaterals and are arranged in parallel. The four sides of the quadrilateral are the inner side, the first middle side, the second middle side and the outer side. The line connecting the midpoint of the outer side and the center line of the screen basket is the first line segment. The first middle side and the second middle side are provided with a second line segment. The first middle side and the second middle side are symmetrically arranged about the second line segment. The angle between the first line segment and the second line segment is 5-10 degrees, and the inner side is inclined relative to the outer side.

[0008] Furthermore, the scraper assembly includes a first ring plate, a second ring plate and a second connecting ring, the second ring plate is located between the first ring plate and the second connecting ring, and multiple scrapers are fixed to the periphery of the first ring plate, the second ring plate and the second connecting ring.

[0009] Furthermore, the drive assembly includes a first drive shaft and a second drive shaft, a gear box fixed to a buffer base is provided on the side of the second shell away from the first shell, the second drive shaft passes through the hollow first drive shaft, the first drive shaft is connected to the bottom of the screen basket, the first drive shaft is inserted into the gear box on the side away from the screen basket and is connected to the first gear, one end of the second drive shaft is connected to the scraper assembly, the end of the second drive shaft away from the scraper assembly extends out of the first connecting shaft and is connected to the second gear, a third gear meshing with the first gear and a fourth gear meshing with the second gear are installed in the gear box, and a motor driving the third gear and the fourth gear to rotate together is installed on the buffer base.

[0010] Compared with existing technologies, the present invention offers the following technical advantages: This practical centrifuge for dewatering granulated blast furnace slag solves the problem of online dehydration of wet slag, achieving mechanical dehydration of the slag material with high dehydration capacity, improving operational efficiency, and eliminating the need for slag material to be dumped on the ground. The angle between the first and second segments is 5-10 degrees, and the inner edges of the screen bars are tilted relative to the outer edges, resulting in optimal filtration and less clogging of the screen basket. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present invention, and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 To embody the overall structural diagram of the utility model;

[0013] Figure 2 To embody the schematic cross-sectional structure of the utility model;

[0014] Figure 3 This is a schematic diagram showing the structure of the screen basket in the utility model;

[0015] Figure 4 A schematic diagram showing the structure of the scraper assembly of the present invention;

[0016] Figure 5 To reflect the top view of the screen basket in the utility model;

[0017] Figure 6 This is a schematic diagram showing the structure of the screen bars in the present invention;

[0018] Figure 7 This is a schematic diagram showing the structure of the drive assembly in the present invention.

[0019] Description of reference numerals: 1. Buffer base; 11. Support leg; 2. Housing; 21. First housing; 211. Feed hopper; 212. Feed pipe; 213. Connecting plate; 214. Door panel; 215. Support ring; 216. Support groove; 22. Second housing; 3. Screen basket; 31. Bottom plate; 32. First connecting ring; 33. Keel; 34. Connecting rod; 35. Screen bar; 351. First line segment; 352. Second line segment; 353. Inner side; 354. First middle side; 355. Second middle side; 356. Outer side; 36. Connecting bar; 4. Scraper assembly; 41. First ring plate; 42. Second ring plate; 43. Second connecting ring; 44. Scraper; 5. Drive assembly; 51. First drive shaft; 52. Second drive shaft; 521. Fixed plate; 53. Gear box; 531. First gear; 532. Second gear; 533. Connecting shaft; 534. Third gear; 535. Fourth gear; 54. Motor; 55. Belt; 6. Discharge pipe; 7. Water outlet pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the schematic embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0021] Reference Figure 1-Figure 7 A blast furnace slag water filtering centrifuge includes a buffer base 1, with legs 11 fixed below the buffer base 1, and a housing 2 fixed above the buffer base 1. The housing 2 includes a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fixed and connected. A door panel 214 is installed on the side of the first housing 21 away from the second housing 22. A feed hopper 211 is fixed to the top of the first housing 21. A feed pipe 212 is provided in the first housing 21. The top of the feed pipe 212 is fixed to the inner wall of the first housing 2 and connected to the feed pipe 212. The feed pipe 212 is connected to the inner wall of the first housing 2 by bolts.

[0022] A screen basket 3 and a scraper assembly 4 are provided inside the shell 2. The screen basket 3 includes a base plate 31 and a first connecting ring 32. The base plate 31 is a circular plate. A plurality of keels 33 are fixed between the base plate 31 and the first connecting ring 32. The plurality of keels 33 are evenly arranged along the circumferential direction of the base plate 31. The keels 33 are inclined. The end of the keel 33 close to the base plate 31 is closer to the center line of the base plate 31 than the end of the keel 33 away from the base plate 31.

[0023] An annular connecting rod 34 is provided on the keel 33, and the connecting rod 34 fixes the multiple keels 33. A plurality of screen bars 35 are fixed between the bottom plate 31 and the first connecting ring 32. The multiple screen bars 35 are evenly arranged along the circumference of the bottom plate 31.

[0024] The screen bars 35 are made of 809C stainless steel and are located inside the keel 33. A plurality of screen bars 35 form a screen mesh, and the gap between each screen bar 35 is 0.25 mm. A connecting bar 36 is fixed between two adjacent keels 33, and the connecting bar 36 is fixed to the screen bars 35. The top surface and the bottom surface of the screen bar 35 are arranged in parallel. The top surface and the bottom surface of the screen bar 35 are both quadrilaterals. The four sides are the inner side 353, the first middle side 354, the second middle side 355 and the outer side 356. The line connecting the midpoint of the outer side 356 and the center line of the screen basket 3 is the first line segment 351. The first middle side 354 and the second middle side 355 are provided with a second line segment 352. The first middle side 354 and the second middle side 355 are symmetrically arranged about the second line segment 352. The line connecting the outer side 356 of the top surface of the screen bar 35 and the midpoint of the outer side 356 of the bottom surface of the screen bar 35 is the third line segment.

[0025] The outer side 356 and the inner side 353 of the screen bar 35 can be arranged in parallel, and the first line segment 351 and the second line segment 352 can overlap, which is a solution 1. Figure 6 The screen bars 35 are rotated 5-10 degrees along the third line segment, the angle between the first line segment 351 and the second line segment 352 is 5-10 degrees, and the inner side 353 of the screen bars 35 is inclined relative to the outer side 356. This is the second solution. The screen basket 3 in the second solution has the best filtering effect and is not prone to clogging.

[0026] A support ring 215 is fixed to the inner wall of the first shell 2 on one side close to the second shell 22 . A support groove 216 is defined on the support ring 215 . The first connecting ring 32 is embedded in the support groove 216 . The first connecting ring 32 can rotate in a circle along the support groove 216 .

[0027] The scraper assembly 4 is located in the screen basket 3. The scraper assembly 4 includes a first ring plate 41, a second ring plate 42 and a second connecting ring 43. The second ring plate 42 is located between the first ring plate 41 and the second connecting ring 43. A plurality of scrapers 44 are fixed to the periphery of the first ring plate 41, the second ring plate 42 and the second connecting ring 43. The scrapers 44 are welded and fixed to the first ring plate 41, the second ring plate 42 and the second connecting ring 43. The plurality of scrapers 44 are evenly arranged along the circumferential direction of the first ring plate 41, and the working surface of the scraper 44 is inlaid with wear-resistant ceramic sheets.

[0028] A drive assembly 5 is provided on the side of the second housing 2 away from the first housing 2, which drives the screen basket 3 and the scraper assembly 4 to rotate at different speeds. The drive assembly 5 includes a first drive shaft 51, a second drive shaft 52 and a gear box 53. The first drive shaft 51 is a hollow shaft supported and fixed by bearings. The second drive shaft 52 passes through the first drive shaft 51. The first drive shaft 51 and the second drive shaft 52 can rotate relative to each other. The two drive shafts are supported and fixed by copper tiles. The gear box 53 is fixed on the buffer base 1. One end of the first drive shaft 51 is located in the housing 2. The first drive shaft 51 is fixed to the bottom plate 31. The first drive shaft 51 can drive the bottom plate 31 to rotate. The side of the first drive shaft 51 away from the bottom plate 31 is inserted into the gear box 53. The gear box 53 is provided with a first gear 531 and a second gear 532. The first gear 531 is located on the side close to the housing 2. The first drive shaft 51 is fixed to the first gear 531.

[0029] One end of the second drive shaft 52 is located in the housing 2. One end of the second drive shaft 52 is bolted to a fixing plate 521, which is fixed to the first ring plate 41 via bolts. The end of the second drive shaft 52, away from the first ring plate 41, extends out of the first drive shaft 51 and is fixed to the second gear 532. A connecting shaft 533 is mounted in the gearbox 53. A third gear 534 and a fourth gear 535 are mounted on the connecting shaft 533. The third gear 534 meshes with the first gear 531, and the fourth gear 535 meshes with the second gear 532. A motor 54 is fixed to the buffer base 1. A belt 55 is installed between the motor 54 and the connecting shaft 533, which drives the connecting shaft 533 to rotate.

[0030] The first gear 531 and the second gear 532 have different numbers of teeth, and the third gear 534 and the fourth gear 535 have the same number of teeth. Therefore, the rotation speeds of the first drive shaft 51 and the second drive shaft 52 are different, which makes the rotation speeds of the bottom plate 31 and the first ring plate 41 different, and thus makes the rotation speeds of the scraper assembly 4 and the screen basket 3 different. The scraper assembly 4 rotates 6-10 more times per minute than the screen basket 3.

[0031] A connecting plate 213 is fixed to one end of the feed pipe 212 away from the feed hopper 211, and the connecting plate 213 is fixed to the second ring plate 42 by bolts. A discharge pipe 6 is fixed to the bottom of the first shell 2, and the discharge pipe 6 is connected to the interior of the first shell 2. A water outlet pipe 7 is fixed to the bottom of the second shell 22.

[0032] The slag enters the feed pipe 212 from the feed hopper 211 and then enters the screen basket 3. As the screen basket 3 and the scraper assembly 4 rotate, the moisture in the slag is thrown out and eventually discharged from the outlet pipe 7. Because the scraper 44 rotates faster than the screen basket 3, as the scraper 44 rotates, it can discharge the slag in the screen basket 3 from the side of the screen basket 3 close to the first shell 2. The slag eventually falls to the bottom of the first shell 2 and is discharged from the discharge pipe 6.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A centrifuge for dewatering granulated blast furnace slag, characterized in that: The invention comprises a buffer base (1) and a shell (2) mounted on the buffer base (1), wherein the shell (2) comprises a first shell (21) and a second shell (22) fixed to one side of the first shell (21), wherein the first shell (21) is connected to the interior of the second shell (22), wherein a screen basket (3) and a scraper assembly (4) are mounted in the second shell (22), wherein the scraper assembly (4) is located inside the screen basket (3), and wherein a feed hopper (211) is fixed to the top of the first shell (21), wherein the bottom of the feed hopper (211) is connected to the feed hopper (211). A feed pipe (212) is provided, and one end of the feed pipe (212) away from the feed hopper (211) is inserted into the screen basket (3). A drive scraper assembly (4) and a drive assembly (5) for rotating the screen basket (3) at different speeds are installed on the buffer base (1). A discharge pipe (6) is fixed to the bottom of the first shell (21). When the scraper assembly (4) rotates, the slag filtered in the screen basket (3) can be spirally transported out of the screen basket (3), and the slag finally falls to the bottom of the first shell (21) and is discharged from the discharge pipe (6).

2. The granulated blast furnace slag dewatering centrifuge according to claim 1, characterized in that: The screen basket (3) comprises a circular bottom plate (31) and a first connecting ring (32). A plurality of keels (33) arranged along the circumferential direction of the bottom plate (31) are fixed between the bottom plate (31) and the first connecting ring (32). A plurality of screen bars (35) are fixed between the bottom plate (31) and the first connecting ring (32). The plurality of screen bars (35) are evenly arranged along the circumferential direction of the bottom plate (31). The screen bars (35) are located inside the keels (33). A connecting bar (36) is fixed between two adjacent keels (33). The connecting bar (36) is located outside the screen bars (35).

3. The granulated blast furnace slag dewatering centrifuge according to claim 2, characterized in that: The top surface and the bottom surface of the screen bar (35) are both quadrilaterals and are arranged in parallel. The four sides of the quadrilateral are an inner side (353), a first middle side (354), a second middle side (355) and an outer side (356). The line connecting the middle point of the outer side (356) and the center line of the screen basket (3) is a first line segment (351). The first middle side (354) and the second middle side (355) are provided with a second line segment (352). The first middle side (354) and the second middle side (355) are symmetrically arranged about the second line segment (352). The angle between the first line segment (351) and the second line segment (352) is 5-10 degrees. The inner side (353) is inclined relative to the outer side (356).

4. The granulated blast furnace slag dewatering centrifuge according to claim 3, characterized in that: The scraper assembly (4) comprises a first ring plate (41), a second ring plate (42) and a second connecting ring (43); the second ring plate (42) is located between the first ring plate (41) and the second connecting ring (43); and a plurality of scrapers (44) are fixed to the peripheries of the first ring plate (41), the second ring plate (42) and the second connecting ring (43).

5. The granulated blast furnace slag dewatering centrifuge according to claim 1, characterized in that: The drive assembly (5) includes a first drive shaft (51) and a second drive shaft (52). A gear box (53) fixed to the buffer base (1) is provided on a side of the second housing (22) away from the first housing (21). The second drive shaft (52) passes through the hollow first drive shaft (51). The first drive shaft (51) is connected to the bottom of the screen basket (3). The side of the first drive shaft (51) away from the screen basket (3) is inserted into the gear box (53) and connected to the first gear (531). One end of the shaft (52) is connected to the scraper assembly (4); an end of the second drive shaft (52) away from the scraper assembly (4) extends out of the first connecting shaft (533) and is connected to the second gear (532); a third gear (534) meshing with the first gear (531) and a fourth gear (535) meshing with the second gear (532) are installed in the gear box (53); and a motor (54) driving the third gear (534) and the fourth gear (535) to rotate together is installed on the buffer base (1).

6. The centrifuge for dewatering granulated blast furnace slag according to claim 4, characterized in that: The working surface of the scraper (44) is inlaid with a wear-resistant ceramic piece.

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