CN113058741A

CN113058741A - Gravity concentrator with high screening precision

Info

Publication number: CN113058741A
Application number: CN202110296934.4A
Authority: CN
Inventors: 赵振民
Original assignee: Qian'an Tianxiang Iron Ore Dressing Co ltd
Current assignee: Qian'an Tianxiang Iron Ore Dressing Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-07-02
Anticipated expiration: 2041-03-19
Also published as: CN113058741B

Abstract

The utility model relates to a gravity concentrator that screening precision is high belongs to the field of powdered ore screening installation, including barrel and the feeding section of thick bamboo of setting on the barrel top, set up the spout of cylinder on the feeding section of thick bamboo inner wall, set gradually upper screen plate and lower sieve plate from top to bottom in the spout, upper screen plate and spout sliding connection, a plurality of springs of fixedly connected with between lower sieve plate and the upper screen plate, the mesh size of last sieve plate is greater than the mesh size of sieve down. This application has the effect that improves the magnetic separation precision of ore pulp.

Description

Gravity concentrator with high screening precision

Technical Field

The application relates to the field of mineral powder screening equipment, in particular to a gravity separator with high screening precision.

Background

In the process of iron powder production and concentration, the slurry needs to be subjected to magnetic separation for multiple times, and then magnetic mineral powder is separated from the slurry. After the slurry is added into the gravity separator, the slurry is subjected to high-efficiency magnetic separation, so that magnetic mineral powder is obtained.

Referring to fig. 1, there is a gravity separator, which includes a frame 1, a cylinder 2 fixed on the frame 1, a feeding cylinder 3 extending into the cylinder 2 at the top of the cylinder 2, a casing 5 fixed on the outer wall of the top of the cylinder 2, an annular overflow trough 51 formed between the casing and the side wall of the cylinder 2, and a waste discharge pipe 6 fixed on the casing 5 and connected to the overflow trough 51. The permanent magnet 23 is arranged outside the side wall of the cylinder 2, the concentrate discharging cylinder 7 is arranged at the bottom end of the cylinder 2, and the concentrate outlet 71 is arranged at the bottom end of the concentrate discharging cylinder 7. The side wall of the cylinder body 2 is provided with a high-pressure water inlet pipe 8 near the bottom end. During separation, ore pulp is added into the cylinder body 2 through the feeding cylinder 3, the permanent magnet 23 enables magnetic mineral powder in the ore pulp to be magnetically gathered, the magnetic mineral powder slides to the concentrate outlet 71 along the inner wall of the cylinder body 2 under the action of gravity, clear water discharged into the cylinder body 2 from the high-pressure water inlet pipe 8 washes the ore pulp, and nonmagnetic mineral powder in the ore pulp overflows out of the cylinder body 2 from the waste material discharge pipe 6 along with the clear water.

In view of the above-mentioned related technologies, the inventor believes that when the ore pulp is added into the cylinder, the pulp is not uniform enough, and the magnetic ore powder may be wrapped by impurities, so that part of the magnetic ore powder is not separated, and thus the magnetic separation accuracy of the magnetic ore powder may be reduced.

Disclosure of Invention

In order to improve the magnetic separation precision of ore pulp, this application provides a gravity concentrator that screening precision is high.

The application provides a gravity concentrator that screening precision is high adopts following technical scheme:

the utility model provides a gravity concentrator that screening precision is high, includes the barrel and sets up the feeding section of thick bamboo on the barrel top, set up the spout of cylinder on the feeding section of thick bamboo inner wall, from top to bottom has set gradually upper screen plate and lower sieve plate in the spout, upper screen plate and spout sliding connection, a plurality of springs of fixedly connected with between lower sieve plate and the upper screen plate, and the mesh size on the upper screen plate is greater than the mesh size of sieve down.

By adopting the technical scheme, the ore pulp enters from the top end of the feeding cylinder and sequentially passes through the upper screen and the lower screen for screening, so that the dispersity of ore pulp particles is improved, magnetic mineral powder and impurities are further separated, and the precision in screening is improved. When the mineral powder falls on the upper sieve plate, if the agglomerated mineral powder is difficult to leak from the sieve pores, the agglomerated mineral powder can be kept on the upper sieve plate temporarily, the upper sieve plate is pressed downwards, and after the mineral slurry smoothly passes through the sieve pores, the upper sieve mesh is lightened under the pressure of the mineral powder, and the elastic force of the spring pushes the upper sieve plate to abut against the top end of the chute, so that the upper sieve plate is pushed to vibrate, and mineral slurry particles remained in the meshes are shaken off. And the fine ore pulp is screened, and meanwhile, the ore powder residue on the upper screen plate is reduced.

Optionally, a shunt pipe is arranged outside the feeding cylinder, a water inlet pipe is connected to the shunt pipe, and a plurality of branch water pipes inserted into the feeding cylinder are fixed on the shunt pipe.

By adopting the technical scheme, the water inlet pipe adds water into the water diversion pipe, the water flows into the feeding cylinder from the branch water pipe, the ore pulp added into the feeding cylinder is diluted and washed, and agglomerated ore powder is separated, so that the magnetic separation of the magnetic ore powder is facilitated.

Optionally, the upper sieve plate includes an upper sieve frame and an upper sieve fixed on the upper sieve frame, the branch water pipe is close to the lower surface of the upper sieve frame, and a top pipe with a port facing the upper sieve frame is fixed on the branch water pipe.

By adopting the technical scheme, when the ore pulp is not intercepted on the upper sieve plate, the upper sieve plate is positioned above the port of the top pipe, water in the water diversion pipe is respectively reserved between the branch water pipe and the top pipe, and the water flow is gentle; when the upper sieve plate slides downwards under the action of the agglomerated gravity, the upper sieve frame abuts against the pipe orifice of the top pipe, water only flows out of the branch water pipe, and under the condition that the water quantity is not changed, the water pressure is increased, the scouring force on the upper sieve mesh is improved, and the agglomerated mineral powder is favorably dispersed.

Optionally, a spoiler having an included angle with the bottom surface of the upper sieve plate is fixed on the bottom surface of the upper sieve plate, and the orifice of the branch pipe is opposite to the spoiler.

Through adopting above-mentioned technical scheme, when the stronger water of water pressure flowed from the water pipe, rivers direct impact the surface of spoiler, and the spoiler receives thrust back, drives the sieve and rotates, and when going up the sieve rotation, the ore pulp that temporarily stays on last sieve was stirred, is convenient for separate the powdered ore.

Optionally, the axis of the branch pipe orifice obliquely intersects with the upper surface of the spoiler.

By adopting the technical scheme, the water flow rushed out of the branch water pipe impacts the upper surface of the spoiler, the water flow pushes the spoiler, meanwhile, the water flow rebounds upwards on the surface of the spoiler, and the rebounded water flushes the upper screen, so that the agglomerated mineral powder is favorably separated.

Optionally, the spoiler is provided with a plurality of groups, and is provided with a plurality of groups of branch water pipes and jacking pipes.

By adopting the technical scheme, after the upper sieve plate slides downwards under the action of gravity in any direction, at least one spoiler is pushed.

Optionally, a connecting rod extending into the feeding cylinder is fixed above the feeding cylinder, the upper sieve plate comprises a plurality of fan-shaped sub sieve plates, a sliding ring which is rotatably connected to the connecting rod and slides along the axis of the connecting rod is fixed on each sub sieve plate, a spoiler is fixed on the lower surface of each sub sieve plate, and a group of branch water pipes and a push pipe are arranged below each sub sieve plate.

Through adopting above-mentioned technical scheme, when the weight on certain branch sieve increases, this current branch sieve rotates around the connecting rod promptly, and the weight of monolithic branch sieve is than, divides the sieve to rotate more easily, and is more sensitive to the perception of ore pulp.

Optionally, a plurality of limiting blocks are fixed on the connecting rod along the axis direction of the connecting rod, a sliding distance for the sliding ring is arranged between two adjacent limiting blocks, and different sliding rings are arranged between two different limiting blocks.

By adopting the technical scheme, when the single sub-sieve plate is pressed by external force, the slip rings can only slide between the two adjacent limiting blocks, so that the two adjacent slip rings are not in contact, the rotation of the two adjacent sub-sieve plates is not influenced mutually, and the ore pulp in a local area is stirred pertinently.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the ore pulp is sequentially screened by the upper screen and the lower screen, so that magnetic mineral powder and impurities are further separated, the screening precision is improved, after the ore pulp smoothly passes through the screen holes, the elastic force of the spring pushes the upper screen plate to abut against the top end of the chute, the upper screen plate is pushed to vibrate, ore pulp particles remained in the meshes are shaken off, and the fine ore pulp is screened while mineral powder residues on the upper screen plate are reduced, so that the screening precision is improved;

2. when the upper sieve plate slides downwards under the gravity of the gathered mineral powder, water only flows out of the branch water pipe, under the condition that the water quantity is not changed, the scouring force on the upper sieve plate is enhanced, the gathered mineral powder is favorably dispersed, and the magnetic separation precision is improved;

3. when water flows out of the branch water pipe, water flow impacts the surface of the flow blocking plate, the flow blocking plate drives the upper sieve plate to rotate after being subjected to thrust, and when the upper sieve plate rotates, ore pulp temporarily staying on the upper sieve plate is stirred, so that mineral powder can be separated conveniently.

Drawings

FIG. 1 is a schematic structural diagram of a related art of the present application;

FIG. 2 is a schematic diagram of the overall structure of the present application;

FIG. 3 is a schematic view of the construction of the prescreening device of the present application;

FIG. 4 is a schematic structural diagram of a connecting rod and a limiting block in the present application;

fig. 5 is a schematic view of the construction of an upper screen deck in the present application;

fig. 6 is a schematic structural view showing the connection relationship between the upper screen deck and the lower screen deck in the present application;

fig. 7 is a schematic view showing the structure of the water distribution pipe according to the present application.

Description of reference numerals: 1. a frame body; 11. a support frame; 2. a barrel; 21. an overflow port; 22. a chute; 23. a permanent magnet; 3. a feeding cylinder; 4. a feed pipe; 5. a housing; 51. an overflow trough; 6. a waste discharge pipe; 7. a concentrate discharging barrel; 71. a concentrate outlet; 8. a high-pressure water inlet pipe; 9. a primary screening device; 91. an upper sieve plate; 911. separating the sieve plate; 9111. an upper screen frame; 9112. a slip ring; 9113. feeding a screen mesh; 92. a lower sieve plate; 921. a lower screen frame; 922. a lower screen mesh; 93. a connecting rod; 931. a limiting block; 94. a spring; 95. a water diversion pipe; 951. a branch water pipe; 952. a water inlet pipe; 953. jacking pipes; 96. a spoiler.

Detailed Description

The present application is described in further detail below with reference to figures 2-7.

The embodiment of the application discloses a gravity separator with high screening precision. Referring to fig. 1, the gravity separation machine comprises a frame body 1 and a cylinder body 2 fixed on the frame body 1, wherein the cylinder body 2 is cylindrical. A plurality of supporting frames 11 are fixed at the top of the cylinder body 2, a cylindrical feeding cylinder 3 is fixed on the supporting frames 11, the feeding cylinder 3 extends into the cylinder body 2, a feeding pipe 4 extending into the feeding cylinder 3 is fixed on the side wall of the feeding cylinder 3, and ore pulp is added into the feeding cylinder 3 from the feeding pipe 4. A cylindrical permanent magnet 23 is fixed on the outer side of the side wall of the cylinder body 2, and after the ore pulp enters the cylinder body 2 from the feeding cylinder 3, the magnetism of the permanent magnet 23 enables magnetic mineral powder in the ore pulp to be gathered and close to the inner wall of the cylinder body 2.

The bottom end of the barrel body 2 is connected with a concentrate discharging barrel 7, and the side wall of the concentrate discharging barrel 7 is an arc-shaped slope surface gathered towards the bottom end. The bottom end of the concentrate discharging barrel 7 is a concentrate outlet 71. A high-pressure water inlet pipe 8 is fixed on the side wall of the cylinder 2 near the bottom end, and clean water is introduced into the cylinder 2 through the high-pressure water inlet pipe 8. The clear water forms vortex-shaped water flow in the cylinder 2 to wash the ore pulp, the magnetic ore powder in the ore pulp slides out from the concentrate outlet 71 because the gravity is larger than the received buoyancy, and the impurities flow to the upper end of the cylinder 2 along the water flow.

An annular shell 5 is fixed on the top of the outer side wall of the cylinder body 2, an overflow groove 51 is formed between the shell 5 and the side wall of the cylinder body 2, and a waste discharge pipe 6 is fixed on the shell 5. The water carrying the impurities overflows from the top of the drum 2 into the overflow bath 51 and is then discharged from the trash discharge pipe 6.

Referring to fig. 2 and 3, a prescreen device 9 is provided inside the feed cylinder 3, and the prescreen device 9 includes an upper screen plate 91 and a lower screen plate 92. A sunken annular chute 22 is formed in the side wall of the feeding cylinder 3, the upper sieve plate 91 is slidably connected in the chute 22, and the lower sieve plate 92 is fixed at the bottom end in the chute 22.

Referring to fig. 4 and 5, a connecting rod 93 coaxially arranged with the feeding cylinder 3 is fixed at the top end of the feeding cylinder 3, the connecting rod 93 extends into the feeding cylinder 3, and a plurality of limiting blocks 931 with the radius larger than that of the connecting rod 93 are fixed on the connecting rod 93 at equal intervals. Go up sieve 91 and include that a plurality of divides sieve 911, be provided with three branch sieve 911 in this application, every branch sieve 911 all includes sectorial last screen frame 9111, goes up screen frame 9111 and is close to the position of centre of a circle and is fixed with annular sliding ring 9112, and sliding ring 9112 cover is established on connecting rod 93 and rotates relatively with connecting rod 93.

The sliding rings 9112 on different upper screen frames 9111 are arranged between two different adjacent limiting blocks 931, and the thickness of the sliding ring 9112 is smaller than the distance between the two adjacent limiting blocks 931, so that the sub-screen plates 911 can slide up and down along the connecting rods 93, and the two adjacent sub-screen plates 911 are not affected by each other. The sliding rings 9112 on different upper screen frames 9111 are fixed at different positions, so that the sub-screen plates 911 are on the same plane when standing. An upper screen mesh 9113 is fixed on the upper screen frame 9111, when slurry enters the feeding cylinder 3 from the feeding pipe 4, the slurry firstly falls on the upper screen plate 91, and the upper screen mesh 9113 performs primary screening on the slurry to separate and smash the agglomerated mineral powder.

Referring to fig. 6, the lower screen plate 92 is disposed below the upper screen plate 91, the lower screen plate 92 includes a circular lower screen frame 921 and a lower screen 922 fixed on the lower screen frame 921, the mesh of the upper screen 9113 is larger than that of the lower screen 922, and a plurality of springs 94 are connected between the upper screen frame 9111 and the lower screen frame 921. The slurry falling from the upper screen 9113 falls onto the lower screen 922, and the lower screen 922 further screens the slurry to further disperse magnetic mineral powder and impurities in the ore slurry.

Referring to fig. 3 and 6, under the condition of no external force pulling, the spring 94 is just at the original length, pushing the upper screen plate 91, so that the upper screen plate 91 is always tightly pressed against the side wall at the top end of the sliding groove 22, and the upper screen frame 9111 is suspended above the limiting block 931. When the upper screen deck 91 receives the slurry thereon, the upper screen deck 91 slides downward along the connecting rods 93 by the gravity of the slurry.

A water distribution pipe 95 surrounding the outside of the feed cylinder 3 is provided outside the feed cylinder 3, and a plurality of water distribution pipes 951 inserted into the chutes 22 are connected to the water inlet pipe 952. The water diversion pipe 95 is connected with a water inlet pipe 952, and water flows into the water diversion pipe 95 from the water inlet pipe 952, and then is discharged into the feeding cylinder 3 from the branch water pipe 951 to be mixed with the slurry, so that the fluidity of the slurry is improved.

A flow blocking plate 96 is fixed to the bottom surface of each upper screen frame 9111, the flow blocking plate 96 is obliquely fixed to the bottom surface of the upper screen frame 9111, the end of the water supporting pipe 951 faces the upper surface of the flow blocking plate 96, and the axis of the water supporting pipe 951 obliquely intersects the upper surface of the flow blocking plate 96. A top pipe 953 is fixed at the top end of the branch water pipe 951 extending into the chute 22, the axis of the top pipe 953 is vertical, and the top end of the top pipe is opposite to the upper screen frame 9111. When slurry on the single separation sieve plate 911 is less, the upper sieve frame 9111 does not abut against the top surface of the top pipe 953, water flows out of the top pipe 953 and the branch water pipe 951 respectively, water is divided, and the water slowly flows into the feeding cylinder 3 to dilute the slurry.

Referring to fig. 3 and 7, when a large amount of mineral powder is agglomerated on a single sub-sieve plate 911, the sub-sieve plate 911 slides downwards due to gravity, the slip ring 9112 is close to the limiting block 931 located below the slip ring, the upper sieve frame 9111 is tightly abutted to the top pipe 953, water in the water dividing pipe 95 flows out of the water dividing pipe 951, under the condition that the water amount is unchanged, the water pressure flowing out of the water dividing pipe 951 is high, the water is flushed on the flow blocking plate 96, and the flow blocking plate 96 is pushed by water power to drive the sub-sieve plate 911 to rotate around the connecting rod 93 serving as an axis, so that the sub-sieve plate 911 shakes and agitates the agglomerated ore pulp, and the ore pulp is dispersed and slides downwards. And the water flow rebounds on the surface of the spoiler 96, and the rebounded water flow impacts the upper screen mesh 9113 to impact the agglomerated mineral powder on the upper screen mesh 9113, so that the mineral powder screening effect is improved, and the magnetic effect is improved.

Referring to fig. 3 and 6, when the sub-sieve plate 911 rotates for a certain distance, if the weight of the slurry on the sub-sieve plate 911 is reduced, the elastic force of the spring 94 automatically pulls the sub-sieve plate 911 back to the original position, and at the same time, the spring 94 presses the upper sieve frame 9111 against the top surface of the chute 22, so that the water flowing out of the water supporting pipe 951 and the water flowing out of the water jacking pipe 953 slowly returns. In the process that the spring 94 pulls the separation sieve plate 911, the separation sieve plate 911 shakes to reduce the slurry remained on the upper sieve mesh 9113.

The implementation principle of the gravity separator with high screening precision in the embodiment of the application is as follows: the ore pulp enters the feeding cylinder 3 from the feeding pipe 4 and is subjected to double screening by the upper screen plate 91 and the lower screen plate 92 to separate impurities coated on the magnetic ore powder. The water flowing from top tube 953 and water leg 951 further dilutes the slurry.

When the ore pulp falls onto the separating sieve plate 911, if agglomerated ore powder in the ore pulp is blocked on the upper sieve mesh 9113, the separating sieve plate 911 slides downwards along the connecting rod 93, the upper sieve frame 9111 abuts against the top pipe 953, water flows out from the water branch pipe 951, impacts the flow blocking plate 96, and the flow blocking plate 96 is pushed to drive the separating sieve plate 911 to rotate around the connecting rod 93. The mineral powder on the upper screen 9113 is stirred, and the agglomerated mineral powder is shaken on the upper screen 9113, so that the screening effect is improved. And the water flow rebounds to the upper part of the upper screen 9113 to impact the meshes on the upper screen 9113, so that the mineral powder remained on the upper screen 9113 is reduced.

When no residual agglomerated ore powder is left on the upper screen plate 91, the upper screen plate 91 slides upward under the elastic force of the spring 94, and the sub-screen plate 911 is returned under the tensile force of the spring 94.

The screened ore pulp enters the cylinder body 2, the magnetism of the permanent magnet adsorbs magnetic mineral powder, so that the magnetic mineral powder is gathered on the side wall of the cylinder body 2, slides into the concentrate discharging cylinder 7 along the side wall of the cylinder body 2, and is finally discharged from the concentrate discharging hole.

The clean water enters the cylinder 2 from the high-pressure water inlet pipe 8, and is impacted in the cylinder 2 to form an upward rotating vortex, and impurities in the ore pulp flow into the overflow groove 51 along with the water flow and finally flow out of the waste discharge pipe 6.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a gravity separation machine that screening precision is high, includes barrel (2) and sets up feeding cylinder (3) on barrel (2) top, its characterized in that: offer cylindrical spout (22) on feed cylinder (3) inner wall, from top to bottom has set gradually upper screen plate (91) and lower sieve board (92) in spout (22), upper screen board (91) and spout (22) sliding connection, a plurality of springs (94) of fixedly connected with between lower sieve board (92) and upper screen board (91), and the mesh size on upper screen board (91) is greater than the mesh size of sieve (92) down.

2. The gravity separator with high screening precision as claimed in claim 1, wherein: a water distribution pipe (95) is arranged on the outer side of the feeding cylinder (3), a water inlet pipe (952) is connected onto the water distribution pipe (95), and a plurality of water pipes (951) inserted into the feeding cylinder (3) are fixed onto the water distribution pipe (95).

3. The gravity separator with high screening precision as claimed in claim 2, wherein: go up sieve (91) and include last reel (9111) and fix last screen cloth (9113) on last reel (9111), prop up water pipe (951) and be close to last screen cloth (9113) lower surface, prop up water pipe (951) and go up the push pipe (953) that is fixed with the port just to going up reel (9111).

4. The gravity separator with high screening precision as claimed in claim 3, wherein: the bottom surface of the upper sieve plate (91) is fixedly provided with a spoiler (96) which forms an included angle with the bottom surface of the upper sieve plate (91), and the orifice of the water branch pipe (951) is opposite to the spoiler (96).

5. The gravity separator with high screening precision as claimed in claim 4, wherein: the axis of the nozzle of the branch water pipe (951) is obliquely intersected with the upper surface of the spoiler (96).

6. The gravity separator with high screening precision as claimed in claim 4, wherein: the spoiler (96) is provided with a plurality of groups, and is provided with a plurality of groups of branch water pipes (951) and jacking pipes (953).

7. The gravity separator with high screening precision as claimed in claim 1, wherein: connecting rod (93) in feed cylinder (3) are fixed with to stretch into feed cylinder (3) top, go up sieve (91) and include the sectorial branch sieve (911) of a plurality of, divide sieve (911) to go up to be fixed with to rotate to connect on connecting rod (93) and along connecting rod (93) gliding sliding ring (9112) of axis, every divides sieve (911) lower surface all to be fixed with a spoiler (96), and every divides sieve (911) below all to be provided with a set of a water pipe (951) and push pipe (953).

8. The gravity separator with high screening precision according to claim 7, wherein: a plurality of limiting blocks (931) are fixed to the connecting rod (93) along the axis direction of the connecting rod (93), sliding distances of the sliding rings (9112) are reserved between the two adjacent limiting blocks (931), and different sliding rings (9112) are arranged between the two different limiting blocks (931).