CN112439547A - Drum magnet separator of adjustable grade - Google Patents
Drum magnet separator of adjustable grade Download PDFInfo
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- CN112439547A CN112439547A CN202011560819.5A CN202011560819A CN112439547A CN 112439547 A CN112439547 A CN 112439547A CN 202011560819 A CN202011560819 A CN 202011560819A CN 112439547 A CN112439547 A CN 112439547A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/24—Details of magnetic or electrostatic separation for measuring or calculating parameters, efficiency, etc.
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Abstract
The invention relates to a grade-adjustable drum magnetic separator, which comprises an ore feeding box, a separation groove, a separation drum, a concentrate box ore discharge pipe, a tailing box ore discharge pipe and a control box of the drum magnetic separator, and is characterized in that the tailing box is provided with a through long separation plate, a liquid level meter is arranged above a left box body, a tailing discharge port of the separation groove is inserted into a right box body, two long-strip ore separation ports are symmetrically arranged on a right side plate of the right box body left and right, and two long-strip ore inlet ports are arranged on the left plate of the concentrate box and are communicated through an ore separation horizontal groove; the two ends of the right box body are provided with gate valve clamping grooves, the top of the tailing box is provided with a supporting steel beam, and a gate valve mechanism is arranged between the clamping grooves and the right side plate. The advantages are that: the amount of the tailings mixed into the concentrate tank is controlled by controlling the opening degree of the ore separation port of the tailing tank, so that the concentrate grade is adjustable, and finally the magnetic concentrate grade of high-quality single magnetite is controlled to be 68-69%.
Description
Technical Field
The invention belongs to the technical field of magnetic separation in a concentrating mill, and particularly relates to a grade-adjustable drum magnetic separator.
Background
Currently, magnetic separation is the most important mineral separation method for iron ore because most iron ore species have certain magnetism, wherein strong magnetic minerals such as magnetite and titanomagnetite are separated by a permanent magnetic drum magnetic separator. The magnetite is present reserves great, to single magnetite, because its kind of ore is single, lack the similar kind of ore of disturbing the magnetic separation, and some magnetite inlay the cloth granularity and be thicker, belong to the ore of easily selecting separately, this kind of ore utilizes the cylinder magnet separator to carry out the magnetic separation after reaching the monomer and dissociating, its concentrate iron grade generally can reach more than 70%, like one magnetite mountain of Peru marksmanna, the concentrate grade has reached 70.5% when using the experiment of permanent magnet cylinder magnet separator, one mine in the Tang mountain area of china, the concentrate grade has reached 70.3% when using the experiment of permanent magnet cylinder magnet separator. Most of the single magnetite which is well selected is iron-selecting desilicication by magnetic separation.
However, when the iron grade reaches more than 70%, part of the fine-particle magnet particles are often lost in tailings due to the inclusion of gangue particles, so that the recovery rate of concentrate is reduced, and the comprehensive metal recovery rate of iron is influenced. In addition, the content of silicon dioxide in high-purity magnetite concentrate (theoretical grade 72.4%) is too low, and the excessive reduction of the content of silicon dioxide in iron making can increase the alkalinity of slag, cause poor fluidity and seriously affect the smooth operation of a blast furnace. Therefore, the highest grade of the fine iron powder is required to be about 68.5 percent, and the overhigh grade is not beneficial to blast furnace iron making.
Therefore, for the magnetite which is singly selected well, the grade of the magnetite is too high after passing through the permanent magnetic cylinder magnetic separator, and the reduction of the grade of the magnetite is beneficial to the increase of the recovery rate of iron and the blast furnace ironmaking, thereby obtaining higher selling price and higher yield and further improving the economic benefit.
For iron mines, because of the large fluctuation of ore properties, a drum magnetic separator having a good separation effect on high-quality and relatively poor-quality iron ores is generally adopted, and the concentrate grade of the magnetic separator is often too high when the ore is fed to high-quality magnetite ores. And for the weak magnetic drum magnetic separator, because the permanent magnetic system is adopted, once the equipment is produced, the magnetism of the weak magnetic drum magnetic separator cannot be adjusted, so that the concentrate grade when the fed ore is high-quality magnetite cannot be reduced by changing the magnetic field intensity of the equipment.
At present, in order to reduce the final concentrate grade of single magnetite, some mines replace a permanent magnet drum type magnetic separator with an elutriation magnetic separator during concentration, and the final concentrate grade after magnetic separation is reduced by adopting a mode of greatly reducing the water rising amount of the elutriation machine. However, in this way, the cost of the elutriation machine is high, and the handling capacity of the monomer equipment is greatly reduced compared with that of the permanent magnet drum magnetic separator, which greatly increases the equipment investment and the capital investment of the separation plant.
In order to reduce the grade of iron ore concentrate in subsequent sintering or pelletizing operation, thereby finally reducing the iron grade during blast furnace smelting and ensuring reasonable silicon content of the raw materials entering the furnace, some enterprises adopt a method for ore blending of relatively low-grade iron ore concentrate and high-grade iron ore concentrate in outsourcing parts. Not only is the raw material purchasing complicated, but also a feeding and discharging facility and a uniform mixing storage yard of an ore storage facility and an ore storage facility of low-grade ores are required to be additionally arranged during ore blending. The total storage time of the general ore-retaining facilities and the blending storage yard generally needs 2 to 7 days, which needs a large storage yard and high capital investment. And the blending yard also needs to use expensive mixing facilities such as a stacker-reclaimer, so that the equipment investment is high. All of which add significantly to the investment and operating costs of the enterprise.
Disclosure of Invention
The invention aims to provide a grade-adjustable drum magnetic separator which is simple in structure, can effectively adjust the grade of high-quality magnetite and improve the comprehensive recovery rate of iron.
The invention relates to a grade-adjustable drum magnetic separator, which comprises an ore feeding box, a separation groove, a separation drum, a concentrate box ore discharge pipe, a tailing box ore discharge pipe and a control box of the drum magnetic separator, wherein the concentrate box is communicated with a concentrate opening of the separation groove; a liquid level meter is arranged above the left box body, a tailing discharge port of the separation tank is inserted into the right box body, two ore separating ports are symmetrically arranged on the right side plate of the right box body in a left-right mode, the ore separating ports are vertically arranged in a long strip shape, two long strip-shaped ore inlet ports are arranged on the left side plate of the concentrate box and correspond to the ore separating ports on the right side plate, and the two long strip-shaped ore separating ports and the two long strip-shaped ore inlet ports are communicated through an ore separating horizontal groove; gate valve clamping grooves are arranged at two ends in the right box body, a supporting steel beam is arranged at the top of the tailing box, a gate valve mechanism is arranged between the gate valve clamping grooves and the right side plate,
the gate valve mechanism comprises a support, a reversible motor, an air cylinder push rod connected with the air cylinder, a bolt and a gate plate, wherein the reversible motor and the air cylinder are fixed on the upper part of the supporting steel beam through the support and the bolt;
the ore discharging pipe of the concentrate tank is provided with a sampling device, the sampling device comprises a sampler, a sample pipe and an automatic level meter, one end of the sampler is connected with the ore discharging pipe of the concentrate tank, the other end of the sampler is connected with the automatic level meter, and a reversible motor of a detection signal gate valve mechanism of the automatic level meter is interlocked.
Preferably, the lower edge of the partition plate is 100-200mm higher than the bottom of the tailing tank.
Preferably, the width of the ore dividing port is 20-40mm, and the height is 100-200 mm.
Preferably, an electric knife gate valve is arranged on the ore discharge pipe of the tailing tank.
Preferably, the length of the ore separation horizontal groove is 200-500 mm.
Preferably, the liquid level meter, the reversible motor of the gate valve mechanism and the automatic level meter are connected with the control box.
The invention has the advantages that:
the grade-adjustable cylindrical magnetic separator controls the amount of tailings mixed into a concentrate tank by controlling the opening degree of a ore separation port of the tailings tank, so that the grade of the concentrate is adjustable, and finally, the grade of the high-quality magnetic concentrate of single magnetite is controlled to be 68-69%. Compared with the concentrate grade of more than 70 percent, the method of mixing the tailings not only increases the yield of the concentrate and the comprehensive recovery rate of iron, but also improves the economic benefit; and the mixed tailings improve the content of silicon dioxide in the fine iron powder, increase the fluidity of slag in iron making and facilitate the smooth operation of the blast furnace.
The ore mixing of the concentrate is directly carried out on the cylinder separated by the cylinder magnetic separator, the single-machine processing capacity of the cylinder magnetic separator is large, the water consumption is low, the specification and the size of the equipment are small, the price is low, and compared with a mode of carrying out selection by adopting an elutriation magnetic separator, the investment and the operation cost are greatly reduced, and the economic benefit is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of fig. 1A-a.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and 2, the grade-adjustable drum magnetic separator of the present invention comprises an ore feeding box 1, a separation tank 2, a separation drum 3, a concentrate box 4, a concentrate box ore discharge pipe 20, a tailing box 5, a tailing box ore discharge pipe 16 and a control box of the drum magnetic separator, wherein the concentrate box 4 is communicated with an ore concentrate port of the separation tank 2, and the tailing box 5 is communicated with a tailing discharge port at the bottom of the separation tank, characterized in that a through long separation plate 15 is arranged along the length direction of the tailing box 5, the separation plate 15 divides the tailing box into a left box body and a right box body, the upper edge of the separation plate 15 is flush with the upper edge of the tailing box, and the lower edge of the separation plate 15 is higher than the bottom of the tailing box; and the lower edge of the partition plate 15 is 100-200mm higher than the bottom of the tailing tank 5, so that the lower parts of the tailing tanks are communicated, a communicating vessel is formed, the right side of the communicating vessel is used for receiving tailings and discharging the tailings, and the left side of the communicating vessel is only used for measuring the liquid level.
The invention is provided with a liquid level meter 18 above the left box body, a tailing discharge port of the separation tank is inserted into the right box body, two ore separating ports 6 are symmetrically arranged on the right side plate 7 of the right box body left and right, the ore separating ports 6 are vertically arranged in a long strip shape, two long strip-shaped ore inlets are arranged on the left side plate 25 of the concentrate box and correspond to the ore separating ports 6 on the right side plate 7, and the two long strip-shaped ore separating ports 6 and the two long strip-shaped ore inlets are communicated through an ore separating horizontal groove 24; the length of the ore separation horizontal groove 24 is 200-500 mm; the width of the strip-shaped ore separation opening is 20-40mm, the height is 100-200mm, the area of the strip-shaped ore separation opening 6 is very small relative to the area of the right side plate of the tailing box, the quantity of the tailings which are separated from the strip-shaped ore separation opening into the concentrate box 4 is small, the grade of the concentrate is only finely adjusted by the separated tailings, the grade of the concentrate is not greatly reduced, and therefore qualified concentrate is produced.
The invention is provided with gate valve clamping grooves 19 at two ends in a right box body, a supporting steel beam 13 is arranged at the top of a tailing box, a gate valve mechanism is arranged between the gate valve clamping grooves 19 and a right side plate 7, and an electric knife gate valve 17 is arranged on a tailing box ore discharge pipe 16; the gate valve mechanism comprises a support 12, a reversible motor 10, a cylinder 9, a cylinder push rod 11 connected with the cylinder 9, a bolt 14 and a gate plate 8, the reversible motor 10 and the cylinder 9 are fixed on the upper part of a support steel beam 13 through the support 12 and the bolt 14, the cylinder push rod 11 is arranged on the lower part of the support steel beam 13, the gate plate 8 is inserted into the right box body, and the upper end of the gate plate is connected with the cylinder push rod 11; the gate valve mechanism ensures the maximum ore separating function of the long-strip ore separating port 6; and the electric lifting of the gate valve mechanism can realize the random adjustment of the strip-shaped ore separating port from full opening to full closing, thereby realizing the stepless adjustment of the ore separating amount from the maximum to 0 and ensuring the control effect of the final concentrate grade.
The invention is characterized in that a sampling device is arranged on a mineral discharging pipe 20 of a concentrate tank, the sampling device comprises a sampler 21, a sample pipe 22 and an automatic level indicator 23, one end of the sampler 21 is connected with the mineral discharging pipe 20 of the concentrate tank, the other end of the sampler is connected with the automatic level indicator 23, and a reversible motor 10 of a detection signal gate valve mechanism of the automatic level indicator 23 is interlocked.
The automatic level meter is provided with a high-grade alarm and a low-grade alarm. When the detection grade of the automatic grade gauge is lower than 68%, the reversible motor 10 of the automatic interlocking electric gate valve mechanism rotates forwards to drive the gate 8 to descend, so that the ore discharge area of the long strip-shaped ore separation port 6 is reduced, the amount of tailings entering the concentrate box is reduced, and the grade of the concentrate product is improved until the alarm is relieved. When the detection grade of the automatic grade gauge is higher than 69%, the reversible motor 10 of the automatic interlocking electric gate valve mechanism reversely rotates to drive the gate 19 to rise, so that the ore discharge area of the long strip-shaped ore separation port 6 is increased, the amount of tailings entering the concentrate box is increased, and the grade of the concentrate product is reduced until the alarm is relieved.
The concentrate grade of the invention is detected by an automatic grade meter, and the concentrate grade can be reflected in real time, so that the concentrate grade is adjusted by adjusting the tailing flow quantity of the ore separation port in a chain driving manner, and the adjustment is timely and rapid, thereby favorably ensuring the acquisition of qualified grade concentrate. The sampler is arranged in front of the automatic level meter, so that the feeding representativeness of the automatic level meter is ensured, and the accuracy of grade measurement is ensured.
The liquid level meter 18, the reversible motor 10 of the gate valve mechanism and the automatic level meter are connected with the control box and automatically operated, so that the mode can realize real-time detection and control, manual operation is not needed, and the labor cost is saved.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (6)
1. A kind of cylinder magnetic separator of the adjustable grade, including feed box, separation trough, separation cylinder, concentrate box ore discharge tube, tailing box ore discharge tube and control box of the cylinder magnetic separator, the said concentrate box communicates with concentrate mouth of the separation trough, the said tailing box communicates with tailing discharge outlet of the bottom of separation trough, characterized by that, there is a through long splitter plate along the length direction in the said tailing box, its splitter plate divides the tailing box into left side box and right side box two parts, the upper edge of the said splitter plate is flush with upper edge of the tailing box, the lower edge of the splitter plate is higher than the bottom of the tailing box; a liquid level meter is arranged above the left box body, a tailing discharge port of the separation tank is inserted into the right box body, two ore separating ports are symmetrically arranged on the right side plate of the right box body in a left-right mode, the ore separating ports are vertically arranged in a long strip shape, two long strip-shaped ore inlet ports are arranged on the left side plate of the concentrate box and correspond to the ore separating ports on the right side plate, and the two long strip-shaped ore separating ports and the two long strip-shaped ore inlet ports are communicated through an ore separating horizontal groove; gate valve clamping grooves are arranged at two ends in the right box body, a supporting steel beam is arranged at the top of the tailing box, a gate valve mechanism is arranged between the gate valve clamping grooves and the right side plate,
the gate valve mechanism comprises a support, a reversible motor, an air cylinder push rod connected with the air cylinder, a bolt and a gate plate, wherein the reversible motor and the air cylinder are fixed on the upper part of the supporting steel beam through the support and the bolt;
the ore discharging pipe of the concentrate tank is provided with a sampling device, the sampling device comprises a sampler, a sample pipe and an automatic level meter, one end of the sampler is connected with the ore discharging pipe of the concentrate tank, the other end of the sampler is connected with the automatic level meter, and a reversible motor of a detection signal gate valve mechanism of the automatic level meter is interlocked.
2. The adjustable grade drum magnetic separator according to claim 1, wherein the lower edge of the partition plate is 100mm-200mm higher than the bottom of the tailing box.
3. The adjustable-grade cylindrical magnetic separator as claimed in claim 1, wherein the width of the ore-separating port is 20-40mm, and the height is 100-200 mm.
4. The adjustable-grade drum magnetic separator according to claim 1, wherein an electric knife gate valve is arranged on the discharge pipe of the tailing box.
5. The adjustable-grade cylindrical magnetic separator as claimed in claim 1, wherein the length of the ore-separating horizontal groove is 200-500 mm.
6. The adjustable-grade drum magnetic separator according to claim 1, wherein the level gauge, the reversible motor of the gate valve mechanism and the automatic level meter are connected with a control box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560819.5A CN112439547A (en) | 2020-12-25 | 2020-12-25 | Drum magnet separator of adjustable grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560819.5A CN112439547A (en) | 2020-12-25 | 2020-12-25 | Drum magnet separator of adjustable grade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112439547A true CN112439547A (en) | 2021-03-05 |
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ID=74739780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011560819.5A Pending CN112439547A (en) | 2020-12-25 | 2020-12-25 | Drum magnet separator of adjustable grade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112439547A (en) |
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2020
- 2020-12-25 CN CN202011560819.5A patent/CN112439547A/en active Pending
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