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CN-121988437-A - High-efficient grinding equipment of former ore pulp

CN121988437ACN 121988437 ACN121988437 ACN 121988437ACN-121988437-A

Abstract

The invention relates to the technical field of mineral processing, and discloses high-efficiency grinding equipment for raw mineral slurry. The semi-autogenous mill main body comprises a feeding box, a grinding cavity and a discharge hole, wherein a primary grinding device is arranged in the grinding cavity, and the device adopts a hook-shaped crushing claw and multistage stepped crushing toothed plate composite structure. The top of the ore pulp screening box is provided with a material collecting hopper which is in butt joint with the discharge hole, a secondary grinding device and an embedded screening frame are arranged in the box, and hammer grinding bodies and tooth-shaped grinding plates are alternately arranged on a grinding roller of the secondary grinding device. The side edges of the ore pulp screening box are connected with the bottom of the chain bucket elevator through the material guiding slide carriage, and the top of the elevator flows back to the feeding box to form closed circulation. The grinding efficiency and the product granularity uniformity are obviously improved, the screening path is optimized, the overgrinding and material accumulation are reduced, the structure is compact, the energy consumption is low, and the operation is stable and reliable.

Inventors

  • SUN XIANG
  • Xin hongqi
  • LIANG XIN
  • JIN MINGZHONG

Assignees

  • 河北新冶材料有限公司

Dates

Publication Date
20260508
Application Date
20260312

Claims (10)

  1. 1. The high-efficiency grinding equipment for raw ore pulp comprises a main body frame assembly (1), an ore pulp screening box (2), a plate chain type bucket elevator (4) and a semi-autogenous mill main body (5), wherein a base support frame (11) is arranged at the bottom of the main body frame assembly (1), the ore pulp screening box (2) is erected on the base support frame (11), an equipment mounting base (13) is arranged on the main body frame assembly (1), the semi-autogenous mill main body (5) is erected on the equipment mounting base (13), The semi-autogenous mill comprises a main body (5) and a main body frame assembly, wherein the main body (5) comprises a feeding box (51), a grinding cavity (52) and a discharge hole assembly (53), a primary grinding device (6) is arranged in the grinding cavity (52), a top fixed base (14) is arranged at the top of the main body frame assembly (1), a mother liquor supply system (7) is arranged on the top fixed base, and a feeding end of the mother liquor supply system (7) is led into the feeding box (51); The top of the ore pulp screening box (2) is provided with an aggregate funnel (22) which is in butt joint with a discharge hole assembly (53), the ore pulp screening box (2) is internally provided with a secondary grinding device (3), the side edge of the ore pulp screening box is provided with a material guiding slide carriage (23) which is in butt joint with the bottom of the plate-chain type bucket elevator (4), and the top of the plate-chain type bucket elevator (4) flows back to the feed box (51); The ore pulp screening box (2) is internally provided with an inner screening frame (8), the bottom of the ore pulp screening box (2) is divided into a finished ore pulp collecting tank (25), the secondary grinding device (3) comprises a driving transmission shaft (31) and a grinding roller (32), the grinding roller (32) is positioned in the inner screening frame (8), the inner screening frame (8) is provided with a screening separation screen plate (84), ore pulp after secondary grinding is screened by the screening separation screen plate (84), qualified ore pulp enters the finished ore pulp collecting tank (25), and unqualified ore pulp flows into a plate chain type bucket elevator (4) through a material guiding slide carriage (23) to return to the feeding box (51).
  2. 2. The raw ore pulp efficient grinding apparatus according to claim 1, characterized in that the primary grinding device (6) comprises: An external belt wheel (67) is arranged at the shaft end of the primary crushing transmission shaft (61), and the shaft body is arranged in the grinding cavity (52) in a penetrating way; a plurality of crushing teeth (62) are distributed along the shaft body of the primary crushing transmission shaft (61), each crushing tooth (62) is provided with a cutter head mounting seat (63), and a plurality of hook-shaped crushing claws (64) are annularly arranged at the periphery of the cutter head mounting seat (63); the crushing tooth plates (65) are arranged on the roller body of the crushing tooth branch (62), and each crushing tooth plate (65) is provided with a hard alloy grinding head (66).
  3. 3. The raw ore pulp efficient grinding apparatus according to claim 1 or 2, characterized in that the mother liquor supply system (7) comprises: A mother liquor storage cylinder (71), the cylinder body of which is arranged on the top fixed base (14) through a cylinder body supporting frame (72); a mother liquor input pipe (73) connected to the top of the mother liquor storage cylinder (71); The anti-sedimentation stirrer (76) is arranged in the hopper body at the bottom of the mother liquor storage cylinder (71); And the transfer conveying pump (74) is arranged on the base supporting frame (11), the output end of the mother liquor input pipe (73) is connected to the transfer conveying pump (74), and the transfer conveying pump (74) is connected to the feeding box (51) through the flow guide pipe (75).
  4. 4. The raw ore pulp efficient grinding apparatus according to claim 1, characterized in that the secondary grinding device (3) comprises: the shaft end of the driving transmission shaft (31) is supported in a rolling bearing seat (24) on the side wall of the ore pulp screening box (2); The grinding roller (32) is arranged on the driving transmission shaft (31), and the roller body of the grinding roller comprises a plurality of annular convex edges (33) which are sequentially arranged; The hammer type grinding bodies (34) and the tooth-shaped grinding plates (35) are arranged in gaps between the adjacent annular convex edges (33) at intervals one by one.
  5. 5. The raw pulp efficient grinding apparatus as defined in claim 4, characterized in that the concealed screening frame (8) comprises: a screen frame top plate (81); The screening separation screen plate (84) is an arc-shaped plate body and extends from one side of the screen frame top plate (81) to the bottom to form screening separation for ore pulp; A side support plate (83) supported between the screen frame top plate (81) and the screen separation screen plate (84), and having bearing mounting holes in the side wall for the grinding roller (32) to penetrate; A feeding area (85) formed between the top plate (81) of the screen frame and the top of the screening separation screen plate (84) and positioned obliquely below the aggregate funnel (22), wherein a feeding guide baffle (89) and an adjusting mechanism (88) for driving the feeding guide baffle to open and close are arranged at the feeding area (85); The discharging area (86) is formed between an outward expansion supporting arm (82) and a screening separation screen plate (84) which are arranged on the other side of the screen frame top plate (81) and corresponds to the material guiding slide carriage (23); the inclination angle adjuster (87) is arranged at the tail end of the screening separation screen plate (84) and is used for adjusting the guide angle of the material guide slide carriage (23); The concealed screening frame (8) is configured to control the opening and closing of the feeding guide baffle (89) through the adjusting mechanism (88) so as to adjust the feeding amount, adjust the discharging guide through the inclination angle adjuster (87), and cooperate with the relative movement of the arc screening separation screen plate (84) and the grinding roller (32) to optimize the screening path, promote the grading effect and reduce the material accumulation.
  6. 6. The apparatus of claim 5, wherein the screen separating screen (84) has an arcuate configuration for mating with the contour of the grinding bowl (32).
  7. 7. The raw pulp high-efficiency grinding device according to claim 1, wherein lateral reinforcing rib plates (21) are arranged outside the pulp screening box (2), and the lateral reinforcing rib plates (21) are in supporting connection with the base supporting frame (11) through the middle connecting frame (12).
  8. 8. The raw ore pulp efficient grinding apparatus as claimed in claim 1, wherein the discharge port assembly (53) of the semi-autogenous mill body (5) is located at the bottom thereof and is butted up and down with the aggregate hopper (22).
  9. 9. The high-efficiency grinding apparatus for raw ore pulp as claimed in claim 1, wherein the apparatus mounting base (13) is erected thereon with a drive motor which is connected to an external pulley (67) of the primary grinding device (6) by a pulley transmission.
  10. 10. The raw pulp high-efficiency grinding device according to claim 1, wherein a built-in supporting seat (26) and a rolling bearing seat (24) are arranged in the pulp screening box (2), and two end shafts of the driving transmission shaft (31) are supported in the rolling bearing seat (24).

Description

High-efficient grinding equipment of former ore pulp Technical Field The invention relates to the technical field of mineral processing, in particular to high-efficiency grinding equipment for raw mineral slurry. Background In the alumina production process, wet grinding of bauxite is a core link of raw ore slurry preparation, the grinding fineness directly determines the subsequent high-pressure dissolution efficiency, and the grinding energy consumption occupies a larger specific gravity of the whole production flow. The existing wet grinding process mainly adopts a closed-circuit grinding system consisting of a ball mill and a classifier, wherein grinding media are filled in the ball mill, the media are driven to move through the rotation of a cylinder body, impact and grinding effects are exerted on bauxite particles, discharged ore pulp is separated, qualified fine-particle products enter the next working procedure, and coarse particles return to the mill for re-grinding. However, this process arrangement has certain drawbacks. The ball mill depends on a single impact grinding mechanism, has limited processing capacity on viscous coarse particles in returned sand, and often needs to add a large amount of liquid to maintain the fluidity of ore pulp, so that the concentration in the mill is diluted to further reduce the grinding efficiency. The liquid content of the return materials is high, the concentration of ore pulp in the mill is diluted, and the unit ore grinding energy consumption is further increased. Disclosure of Invention The invention aims to provide high-efficiency grinding equipment for raw ore pulp, so as to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: the high-efficiency grinding equipment for raw ore pulp comprises a main body frame assembly, an ore pulp screening box, a plate chain type bucket elevator and a semi-autogenous mill main body, wherein a base support frame is arranged at the bottom of the main body frame assembly, the ore pulp screening box is erected on the base support frame, an equipment installation base is arranged on the main body frame assembly, and the semi-autogenous mill main body is erected on the equipment installation base; the semi-autogenous mill main body comprises a feeding box, a grinding cavity and a discharge hole assembly, wherein a primary grinding device is arranged in the grinding cavity; The top of the ore pulp screening box is provided with an aggregate funnel which is in butt joint with the discharge port assembly, the ore pulp screening box is internally provided with a secondary grinding device, the side edge of the ore pulp screening box is provided with a guide slide carriage which is in butt joint with the bottom of the plate-chain bucket elevator, and the top of the plate-chain bucket elevator flows back to the feeding box; The ore pulp screening box is internally provided with an internal screening frame, the bottom of the ore pulp screening box is divided into a finished ore pulp collecting tank, the secondary grinding device comprises a driving transmission shaft and a grinding roller, the grinding roller is arranged in the internal screening frame, the internal screening frame is provided with a screening separation screen, ore pulp subjected to secondary grinding is screened by the screening separation screen, qualified ore pulp enters the finished ore pulp collecting tank, and unqualified ore pulp returns to the feeding box through a guide slide carriage inflow plate chain bucket elevator. As a further aspect of the present invention, the primary grinding apparatus includes: The shaft end of the primary crushing transmission shaft is provided with an external belt pulley, and the shaft body penetrates through the grinding cavity; The crushing teeth are distributed along the shaft body of the primary crushing transmission shaft, each crushing tooth is provided with a cutter head mounting seat, and the periphery of each cutter head mounting seat is provided with a plurality of hook-shaped crushing claws in a surrounding manner; the crushing toothed plates are arranged on the crushing toothed branch roller body, and each crushing toothed plate is provided with a hard alloy grinding head. As a further aspect of the present invention, the mother liquor supply system includes: The mother liquor storage cylinder is characterized in that a cylinder body of the mother liquor storage cylinder is arranged on a top fixed base through a cylinder body supporting frame; The mother liquor input pipe is connected to the top of the mother liquor storage cylinder; the anti-sedimentation stirrer is arranged in the hopper body at the bottom of the mother liquor storage cylinder; And the transfer conveying pump is arranged on the base supporting frame, the output end of the mother liquor input pipe is connected to the transfer conveying pump, and the