CN219187219U - Separation of stubborn stones and steel ball of semi-autogenous mill and stubborn stone crushing system - Google Patents
Separation of stubborn stones and steel ball of semi-autogenous mill and stubborn stone crushing system Download PDFInfo
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- CN219187219U CN219187219U CN202320105438.0U CN202320105438U CN219187219U CN 219187219 U CN219187219 U CN 219187219U CN 202320105438 U CN202320105438 U CN 202320105438U CN 219187219 U CN219187219 U CN 219187219U
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Abstract
The utility model relates to a system for separating and crushing stubborn stones from steel balls of a semi-autogenous mill, which comprises the semi-autogenous mill, wherein a discharge hole of the semi-autogenous mill is connected with a feed inlet of a vibrating screen, and a coarse material discharge hole of the vibrating screen is connected with a feed inlet of a vibrating separator; the vibration separator is of a concentrating table structure, the whole bed surface is obliquely arranged around one corner of the lower end of the bed surface, a plurality of grooves are formed in the bed surface along the descending direction of the bed surface, and the bed surface is a shovel-shaped bed surface; a separation guide plate is obliquely arranged upwards in the middle of the bottom end of the bed surface; the width of the groove is 3-5 mm, and the depth of the groove is 1-2 mm; the plane included angle between the bed surface and the horizontal plane is 8-10 degrees; the diameter of the steel ball is larger than 3cm. The utility model can realize the separation of most of stubborn stones and steel balls and the cone crushing of stubborn stones, thereby realizing the full recycling of stubborn stones.
Description
Technical Field
The utility model relates to the technical field of iron ore dressing and smelting equipment, in particular to a system for separating and crushing stubborn stones and steel balls of a semi-autogenous mill.
Background
In the mineral resource development process, most metal mine ore dressing plants have crushing and grinding processes, and most ore dressing plants usually adopt semi-automatic grinding machines as ore grinding equipment because the semi-automatic grinding process has the advantages of short flow, high automation degree, good site operation environment and the like, steel balls are added into the semi-automatic grinding machines as ore grinding media to grind the primarily crushed ore, and the steel balls are used as the ore grinding media to enable the ore to be fully separated, but the semi-automatic grinding machines also can be worn down along with the influence of reaction of continuous work and finally discharged. In addition, because of different causes of ores in nature, ores in the grinding process are difficult to further reduce after being ground to a certain size, relatively stable ores or gravels are formed, the ores are called as "stubbles", and the stubbles are finally discharged out of the semi-autogenous mill.
In order to fully utilize mineral resources and protect the environment, the stubborn stones need to be further treated, and the discharged steel balls need to be recovered, so that the stubborn stones discharged from the semi-autogenous mill together with the steel balls need to be separated. For non-magnetic stubborn stones, the waste steel balls are easily separated from the non-magnetic stubborn stones by magnetic separation equipment; however, for the magnetic stubborn stones, the waste steel balls cannot be well separated from the magnetic stubborn stones by magnetic separation equipment, and the amount of stubborn stones and steel balls generated by a concentrating mill is large and the separation is not suitable for being carried out by adopting a manual mode.
The separation of the refractory stones and the steel balls discharged from the semi-autogenous mill is now generally carried out by the following methods:
1. for non-magnetic stubborn stones, a scheme of a magnetic arc and a metal detector plus an electromagnet iron remover is generally adopted to remove steel scraps balls and other iron parts in the stubborn stones. However, for the magnetic refractory stone (magnetite ore), the method cannot separate well, part of the magnetic refractory stone can be sucked out by magnetic force, the iron removal rate is low, and a good separation effect cannot be achieved. The processing mode of the stubborn stones in the scheme is that the stubborn stones are returned to the semi-automatic grinding machine again for grinding, and the process is repeated until the stubborn stones are thoroughly ground into powder; because the stubborn stones are relatively stable ores or gravels formed after primary crushing and primary grinding, the stubborn stones can be ground into powder after repeatedly and circularly entering the semi-autogenous mill for many times, and the production cost is increased intangibly.
2. The production mines with smaller scale are separated by adopting a manual sorting mode, and the manual sorting can well separate the production mines, but the manual labor intensity is high, and the mode cannot be applied to mines with larger production scale; the processing mode of the stubborn stones in the scheme is that the stubborn stones are returned to the semi-automatic grinding machine again for grinding, and the process is repeated until the stubborn stones are thoroughly ground into powder; because the stubborn stones are relatively stable ores or gravels formed after primary crushing and primary grinding, the stubborn stones can be ground into powder after repeatedly and circularly entering the semi-autogenous mill for many times, and the production cost is increased intangibly.
3. The technology has the advantages that the iron is removed by adopting an X-ray identification and blowing mode, the technology has higher requirements on a blowing device and a metal part developing technology, more equipment control modules, larger cost investment and high maintenance cost, and the technology can not separate large-block steel balls by blowing. The processing mode of the stubborn stones in the scheme is that the stubborn stones are returned to the semi-automatic grinding machine again for grinding, and the process is repeated until the stubborn stones are thoroughly ground into powder; because the stubborn stones are relatively stable ores or gravels formed after primary crushing and primary grinding, the stubborn stones can be ground into powder after repeatedly and circularly entering the semi-autogenous mill for many times, and the production cost is increased intangibly.
How to realize the high-efficiency separation of the magnetic stubborn stones and the ores has high practical significance for industrial and mining enterprises.
Disclosure of Invention
In view of the above existing technology and mode for separating steel balls and iron pieces from stubborn stones, the utility model aims to provide a system for separating and crushing stubborn stones of a semi-autogenous mill and steel balls, which realizes the separation of most stubborn stones and steel balls.
The specific technical scheme is as follows: the system comprises a semi-autogenous mill, a discharge port of the semi-autogenous mill is connected with a feed port of a vibrating screen, and a coarse material discharge port of the vibrating screen is connected with a feed port of a vibrating separator; the vibrating separator is of a concentrating table structure, the concentrating table structure comprises a transmission device, a frame and a table surface, the table surface is movably arranged on the frame, the upper end of the table surface is connected with the transmission device, and the table surface can be driven to reciprocate on the frame under the condition of periodic movement of the transmission device; the whole bed surface is obliquely arranged around one corner of the lower end of the bed surface, and a plurality of grooves are formed in the bed surface along the descending direction of the bed surface; the bed surface is a shovel-shaped bed surface, namely, the upper end and two sides of the bed surface are provided with baffle plates, and the lower end of the bed surface is provided with an opening; the middle part of the bottom end of the bed surface is obliquely upwards provided with a separation guide plate, the separation guide plate can play a role in diversion, and the magnetic stubborn stones on the bed surface above the separation guide plate are prevented from falling into a steel ball blanking area; the width of the groove is 3-5 mm, and the depth of the groove is 1-2 mm; the plane included angle between the bed surface and the horizontal plane is 8-10 degrees; the diameter of the steel ball is larger than 3cm.
Preferably, a belt conveyor a is arranged between the vibrating screen and the vibrating separator, a coarse material outlet of the vibrating screen is connected with a feeding end of the belt conveyor a, and a discharging end of the belt conveyor a is connected with a feeding port of the vibrating separator.
Preferably, the light material outlet of the vibration separator is connected with the feed inlet of the cone crusher through a belt conveyor b, and the discharge outlet of the cone crusher is connected with the feed inlet of the semi-autogenous mill through a belt conveyor c.
Preferably, a belt conveyor e is connected with the feed inlet of the semi-autogenous mill, and mineral powder is conveyed into the semi-autogenous mill through the belt conveyor e; the discharging end of the belt conveyor c is connected with the belt conveyor e, and the stubborn stones crushed by the cone crusher are conveyed to the belt conveyor e and then conveyed to the semi-autogenous mill through the belt conveyor e.
Preferably, a stubborn stone bin is arranged at a part of the discharge hole above the bed surface bottom separation guide plate, and a steel ball bin is arranged at a part of the discharge hole below the bed surface bottom separation guide plate.
Preferably, the total length of the separation guide plate is 1/10-1/5 of the length of the bed surface, and the acute angle between the separation guide plate and the bottom end of the bed surface is 45-80 degrees.
Preferably, the partition guide plate is arranged across the center line of the bed surface, and the length of the partition guide plate across the center line of the bed surface is less than 1/10 of the length of the partition guide plate.
Preferably, the highest position of the top end of the bed surface is set as a feeding end.
Ore enters a semi-self mill for grinding through a belt conveying device after primary crushing, ore pulp, stubborn stones and worn steel balls flow out from a semi-self mill discharge end to a grid screen at the rear end of the semi-self mill, most ore pulp passes through the grid screen to a sand sedimentation tank below, stubborn stones, worn steel balls and a small part of ore pulp serve as oversize materials to reach a vibrating screen below from the grid screen, a small amount of the brought ore pulp is thoroughly screened out, and at the moment, the oversize materials are all stubborn stones, steel balls and blocky articles, and the oversize materials are transferred to a stubborn stones and steel balls vibrating separation device through the belt conveying device for vibrating separation. The separated stubborn stones are conveyed to a cone crusher for crushing by a belt conveyor, and then returned to the semi-autogenous mill by the belt conveyor.
Compared with the prior art, the utility model has the following advantages:
(1) By utilizing the difference of densities of the steel balls and the stubborn stones, the stubborn stones and the steel balls on the bed surface are separated left and right under the action of vibration force and gravity by adjusting the angles of the bed surface of the stubborn stones and the steel balls vibration separation device, and then fall into a stubborn stone bin and a steel ball bin respectively through a thin groove and a partition plate of the bed surface, so that the stubborn stones and the steel balls are separated.
(2) The separated stubborn stones are crushed by the cone crusher, so that the original shape of the stubborn stones can be effectively changed, the stable state of the stubborn stones is broken, the stubborn stones can be easily ground into powder when returned to the semi-automatic mill again, the stubborn stones are prevented from being ground into powder after repeatedly and circularly entering the semi-automatic mill for many times, and the production cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a device connection of the present utility model;
FIG. 2 is a schematic front view of a magnetic stubby stone and steel ball separation device;
FIG. 3 is a schematic top view of a magnetic stubby and steel ball separation device;
wherein, 1-semi-autogenous mill; 2-a vibrating screen; 3-stubborn stones and steel ball belt transmission device (belt conveyor a); 4-stubborn stones and steel ball vibration separation device; 5-a steel ball bin and 6-a stubborn stone bin; 7-stubby belt conveyor (belt conveyor b) 8-cone crusher; 9-a stubby coarse material belt transmission device (a belt conveyor c); 10-raw ore belt conveyor (belt conveyor e);
4-1-transmission means; 4-2-feeding end; 4-3 parts of bed surface; 4-4-frames; 4-5-steel ball bin; 4-6-stubborn stones; 4-7-grooves; 4-8-dividing guide plates; 4-9-baffle.
Detailed Description
The system for separating and crushing stubborn stones from steel balls of the semi-autogenous mill shown in fig. 1 comprises a semi-autogenous mill 1, wherein a discharge port of the semi-autogenous mill 1 is connected with a feed port of a vibrating screen 2, and a coarse material discharge port of the vibrating screen 2 is connected with a feed port of a vibrating separator 4.
Ore enters a semi-autogenous mill 1 for grinding through a belt conveying device after primary crushing, ore pulp, stubborn stones and worn steel balls flow out from a semi-autogenous mill discharge end to a grid screen at the rear end of the semi-autogenous mill, most ore pulp passes through the grid screen to a sand sedimentation tank below, stubborn stones and worn steel balls and a small part of ore pulp serve as oversize materials to reach a vibrating screen 2 below from the grid screen, a small amount of the carried ore pulp is thoroughly screened out, and at the moment, the oversize materials are all stubborn stones, steel balls and blocky articles, and the oversize materials are transferred to a stubborn stones and steel balls vibrating separation device 4 through the belt conveying device for vibrating separation.
A belt conveyor a3 is arranged between the vibrating screen 2 and the stubborn stones and steel ball vibration separating device 4, a coarse material outlet of the vibrating screen 2 is connected with a feeding end of the belt conveyor a3, and a discharging end of the belt conveyor a3 is connected with a feeding port of the vibration separator 4. The light material outlet of the vibration separator 4 is connected with the feed inlet of the cone crusher 8 through a belt conveyor b7, and the discharge outlet of the cone crusher 8 is connected with the feed inlet of the semi-autogenous mill 1 through a belt conveyor c 9. A belt conveyor e10 is connected to the feed inlet of the semi-autogenous mill 1, and mineral powder is conveyed into the semi-autogenous mill 1 through the belt conveyor e 10; the discharging end of the belt conveyor c9 is connected with the belt conveyor e10, and the stubborn stones crushed by the cone crusher 8 are conveyed to the belt conveyor e10 and then conveyed into the semi-autogenous mill 1 through the belt conveyor e 10.
The stubborn stones in the stubborn stone bin are conveyed to the cone crusher 8 for crushing by the belt conveyor b7, and then returned to the semi-autogenous mill 1 with the coarsely crushed ores by the belt conveyor c9 and the belt conveyor e 10.
The magnetic hard stone and steel ball separating device 4 (shown in fig. 2 and 3) in the embodiment specifically is a concentrating table structure, which comprises a transmission device 4-1, a frame 4-4 and a table surface 4-3, wherein the table surface 4-3 is movably arranged on the frame, the upper end of the table surface 4-3 is connected with the transmission device 4-1, and the table surface 4-3 can be driven to reciprocate on the frame under the condition that the transmission device 4-1 periodically moves, so that the concentrating table structure is well known to a person skilled in the art and is the prior art.
The differences are: the whole bed surface is obliquely arranged around one angle of the lower end of the bed surface, and the plane included angle between the bed surface 4-3 and the horizontal plane is 8-10 degrees; a plurality of grooves 4-7 are formed in the bed surface 4-3 along the descending direction of the bed surface, the width of each groove 4-7 is 3-5 mm, and the depth of each groove is 1-2 mm; because the stubborn stones are irregularly shaped (with edges and corners), the grooves can block the stubborn stones to a certain extent, and the general size of the steel ball is larger than 3cm, so that the movement of the steel ball is not limited by the grooves; this arrangement causes the stubby to fall down the bed (right to left in fig. 3) and the steel ball to roll in an inclined direction (top to bottom in fig. 3) so that the magnetic stubby and the steel ball separate.
The bed surface 4-3 is a shovel-shaped bed surface, namely, the upper end (corresponding to the right end of the bed surface in fig. 2 and 3) and two sides (corresponding to the upper end and the lower end of the bed surface in fig. 2 and 3) of the bed surface 4-3 are provided with baffle plates 4-9, the lower end of the bed surface 4-3 is opened (the lower end of the bed surface is the tail end of the bed surface and corresponds to the left end of the bed surface in fig. 2 and 3), so that the arrangement is convenient for stubborn stones and steel balls to finally come out from the lower end of the bed surface, and the steel balls are prevented from rolling off from the side edges of the bed surface.
The middle part of the bottom end of the bed surface is obliquely upwards provided with a separation guide plate 4-8, the total length of the separation guide plate 4-8 is 1/10-1/5 of the length of the bed surface 4-3, and the acute angle between the separation guide plate 4-8 and the bottom end of the bed surface 4-3 is 45-80 degrees. The separation guide plates 4-8 can play a role in diversion, so that when the magnetic stubborn stones on the bed surface above the separation guide plates fall to the lower part of the bed surface along the groove of the bed surface, the stubborn stones easily pass through the center line of the bed surface and fall into the steel ball blanking area due to the steeper bed surface. The separation plate cannot be too long, the steel balls are easy to intercept in advance, the steel balls roll out of the stubborn stone blanking area, and the separation plate cannot be too short, so that a good diversion effect cannot be achieved. Because the shape of the stubby stones is different, the magnetism of the stubby stones and the size of the steel balls are changed, so that the length and the inclination angle of the separation guide plates 4-8 are not very accurate values, and a preferred value needs to be determined according to a large number of experiments, the separation of most magnetism stubby stones and the steel balls can be realized in the way, and the separation of incompletely separated magnetism stubby stones and the steel balls can be realized by manual sorting due to the small number of the incompletely separated magnetism stubby stones and the steel balls.
Preferably, the partition guide 4-8 is disposed across the centerline of the bed surface 4-3, and the length of the partition guide 4-8 across the centerline of the bed surface 4-3 is less than 1/10 the length of the partition guide 4-8, i.e., the partition guide 4-8 preferably is across the centerline of the bed surface 4-3, but cannot be too long; the position of the partition guide plate 4-8 is determined from the relationship between the inclination angle, the length and the center line of the bed surface of the partition guide plate 4-8.
Preferably, the material outlet of the part above the bed surface bottom separation guide plate 4-8 is provided with a stubborn stone bin 4-6, and the material outlet of the part below the bed surface bottom separation guide plate 4-8 is provided with a steel ball bin 4-5, so that stubborn stones and steel balls can be collected timely.
Preferably, the highest position of the top end of the bed surface 4-3 is set as a feeding end 4-2 (the position of a dotted line frame), namely, the feeding end 4-2 is at least higher than the central line of the bed surface, so that stubborn stones fall onto the bed surface 4-3 above the central line, the stubborn stones are prevented from being limited by grooves, and the stubborn stones enter a steel ball blanking area when falling directly along the grooves.
The magnetic refractory stone and steelBasic principle of the ball separating device 4: because the density of the gangue is 1-4 g/cm 3 The density of the magnetite is 5.16-5.18 g/cm 3 The density of the steel balls is 7.0-7.8 g/cm 3 The angle of the bed surface of the device for vibrating and separating the stubborn stones and the steel balls is adjusted, the stubborn stones and the steel balls moving back and forth on the bed surface are separated left and right under the action of vibrating force and gravity, and then fall into a stubborn stone bin and a steel ball bin respectively under the action of grooves and partition plates of the bed surface, so that the stubborn stones and the steel balls are separated.
Claims (8)
1. The system is characterized by comprising a semi-autogenous mill (1), wherein a discharge port of the semi-autogenous mill (1) is connected with a feed port of a vibrating screen (2), and a coarse material discharge port of the vibrating screen (2) is connected with a feed port of a vibrating separator (4);
the vibrating separator (4) is of a concentrating table structure, the concentrating table structure comprises a transmission device (4-1), a frame and a bed surface (4-3), the bed surface (4-3) is movably arranged on the frame (4-4), the upper end of the bed surface (4-3) is connected with the transmission device (4-1), and the bed surface (4-3) can be driven to reciprocate on the frame (4-4) under the condition that the transmission device (4-1) periodically moves;
the whole bed surface is obliquely arranged around one corner of the lower end of the bed surface, and a plurality of grooves (4-7) are formed in the bed surface (4-3) along the descending direction of the bed surface;
the bed surface (4-3) is a shovel-shaped bed surface, namely, the upper end and two sides of the bed surface (4-3) are provided with baffle plates (4-9), and the lower end of the bed surface (4-3) is opened;
the middle part of the bottom end of the bed surface is obliquely upwards provided with a separation guide plate (4-8), and the separation guide plate (4-8) can play a role in shunting;
the width of the groove (4-7) is 3-5 mm, and the depth of the groove is 1-2 mm;
the plane included angle between the bed surface (4-3) and the horizontal plane is 8-10 degrees.
2. A semi-autogenous mill stubby stone and steel ball separation and stubby stone crushing system as claimed in claim 1, characterized in that a belt conveyor a (3) is arranged between the vibrating screen (2) and the vibrating separator (4), a coarse material outlet of the vibrating screen (2) is connected with a feeding end of the belt conveyor a (3), and a discharging end of the belt conveyor a (3) is connected with a feeding port of the vibrating separator (4).
3. A semi-autogenous mill stubby and steel ball separation and stubby crushing system according to claim 2, wherein the light material outlet of the vibration separator (4) is connected with the feed inlet of the cone crusher (8) through a belt conveyor b (7), and the discharge outlet of the cone crusher (8) is connected with the feed inlet of the semi-autogenous mill (1) through a belt conveyor c (9).
4. A system for separating and crushing refractory stones from steel balls of a semi-autogenous mill according to claim 3, wherein a belt conveyor e (10) is connected with a feed port of the semi-autogenous mill (1), and mineral powder is conveyed into the semi-autogenous mill (1) through the belt conveyor e (10); the discharging end of the belt conveyor c (9) is connected with the belt conveyor e (10), and the stubborn stones crushed by the cone crusher (8) are conveyed to the belt conveyor e (10) and then conveyed to the semi-autogenous mill (1) through the belt conveyor e (10).
5. The system for separating and crushing stubborn stones from steel balls of the semi-autogenous mill as recited in claim 1, wherein a stubborn stone bin (4-6) is arranged at a part of a discharge hole above a bed surface bottom separation guide plate (4-8), and a steel ball bin (4-5) is arranged at a part of a discharge hole below the bed surface bottom separation guide plate (4-8).
6. A semi-autogenous mill stubby stone and steel ball separation and stubby stone crushing system as claimed in claim 1, characterized in that the total length of the separation guide plate (4-8) is 1/10-1/5 of the length of the bed surface (4-3), and the acute angle between the separation guide plate (4-8) and the bottom end of the bed surface (4-3) is 45-80 degrees.
7. A semi-autogenous mill stubby and steel ball separation and stubby crushing system as claimed in claim 6 wherein the partition guide plate (4-8) is disposed across the centre line of the bed surface (4-3) and the partition guide plate (4-8) has a length across the centre line of the bed surface (4-3) less than 1/10 of the length of the partition guide plate (4-8).
8. A semi-autogenous mill stubby stone and steel ball separation and stubby stone crushing system as claimed in claim 1, characterized in that the top of the bed surface (4-3) is provided at the highest point with a feed end (4-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320105438.0U CN219187219U (en) | 2023-02-03 | 2023-02-03 | Separation of stubborn stones and steel ball of semi-autogenous mill and stubborn stone crushing system |
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| CN202320105438.0U CN219187219U (en) | 2023-02-03 | 2023-02-03 | Separation of stubborn stones and steel ball of semi-autogenous mill and stubborn stone crushing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116116516A (en) * | 2023-02-03 | 2023-05-16 | 鹤庆北衙矿业有限公司 | Magnetic stubborn stone and steel ball separating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116116516A (en) * | 2023-02-03 | 2023-05-16 | 鹤庆北衙矿业有限公司 | Magnetic stubborn stone and steel ball separating device |
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