CN212167779U - Magnetic-gravity combined belt concentrator - Google Patents

Abstract

The utility model discloses a magnetic-gravity combined belt concentrator, which relates to the technical field of mineral processing equipment, and comprises a frame and a separation belt mechanism arranged on the frame, wherein the separation belt mechanism comprises a separation belt, a driving roller and a driven roller which are arranged at the two ends of the separation belt, and a plurality of compression rollers which are arranged below the separation belt; a tailing tank and a concentrate receiving tank are arranged below the sorting belt; a spraying device is arranged above the sorting belt and sprays water mist to the sorting belt; a magnet unit is arranged below the sorting belt.

Description

Magnetic-gravity combined belt concentrator

Technical Field

The utility model relates to a mineral processing equipment technical field especially relates to a belt concentrator is united to magnetism weight.

Background

The existing cross-flow belt chute is also called a cross-flow belt concentrator, and is called a cross-flow belt for short. The cross-flow belt concentrating machine is a device which is on a belt which is in straight line continuous motion around a slope, and the ore pulp is fed on the surface of the belt to make ore particle groups loose and layered, and separate light and heavy minerals. The cross flow belt has a certain gradient in the longitudinal direction, ore pulp is fed from the higher side, tailings enter a tailing tank from the lower side, and a concentrate side is taken at one end of a tail pulley and can be divided into a plurality of concentrate products with different grades according to requirements. The flow velocity of flushing water on the cross flow belt is low, the enrichment ratio of concentrate is high, and the cross flow belt is often matched with a centrifugal concentrator for use, and the concentrate of the centrifugal concentrator is further concentrated. The device has a simple structure but low processing capacity.

And current magnetic concentrator adopts the magnetic force roller to carry out the ore dressing usually, the magnetic force roller includes that center pin and rotatable cover locate the outer roller of center pin, the inboard magnetic system that is equipped with the arcuation along the axial of roller and arranges, the magnetic mineral in the mineral of treating the selection is adsorbed on the roller, along with the roller is rotatory, non-magnetic mineral can not adsorbed, under the effect of centrifugal force, mix with in the non-magnetic powder in magnetic mineral is thrown into the tailing fill, and rotate along with the roller, when magnetism was rotated outside the magnetic force scope of magnetic system, magnetic mineral falls into the concentrate fill under the effect of external force. The existing magnetic separator can not solve the problems of magnetic system inclusion and mechanical inclusion, so that the final high-quality concentrate can not be obtained when fine grains, micro-fine grains and weakly magnetic minerals are sorted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heavy belt concentrator of magnetism improves the handling capacity of crossing current belt concentrator.

In order to solve the problems, one aspect of the utility model provides a magnetic-gravity combined belt concentrator, which comprises a frame and a sorting belt mechanism arranged on the frame, wherein the sorting belt mechanism comprises a sorting belt, a driving roller and a driven roller which are arranged at two ends of the sorting belt and a plurality of compression rollers arranged below the sorting belt; a tailing tank and a concentrate receiving tank are arranged below the sorting belt; a spraying device is arranged above the sorting belt and sprays water mist to the surface of the sorting belt; a magnet unit is arranged below the sorting belt. When the device is used, the ore feeder uniformly distributes ore pulp to the separation belt, the spraying device sprays water mist to the separation surface of the separation belt, the upper surface of the separation belt moves under the action of the motor as the separation surface, and the water mist sprayed by the spraying device and the water in the ore pulp form a laminar flow film on the separation surface. The ore feeder on the rack injects ore pulp with the concentration of 30-50% onto the separation surface of the moving separation belt, and when the ore pulp enters the flowing film and moves along with the separation belt. The Bygrano theory shows that: when the fluid is acted by a shearing force, the solid particles in the fluid are acted by a dispersing pressure in the direction perpendicular to the shearing force in addition to the shearing force in the same direction, so that the materials are layered or suspended. The mineral particles and the gangue have different densities and are finally separated under the action of the water fluid into a tailing tank and a concentrate receiving tank. The sorted mineral particles can also be classified in more stages. The magnet unit arranged above or below the sorting belt can provide additional magnetic force effect for the magnetic mineral particles, so that the stress difference between the magnetic mineral particles and the gangue is larger, and the magnetic mineral particles and the gangue are easier to sort. The atomizing device sprays atomized water drops on the sorting surface of the sorting belt, the atomized water drops gently fall on the flowing film of the sorting disc of the sorting belt, the flowing film plays a certain stirring role, and the separation of mineral particles in the flowing film can be accelerated under the condition that the normal movement of the flowing film is not damaged.

The further technical proposal is that the spraying direction of the spraying device is vertical to the sorting belt. The spraying direction of the water mist falls perpendicular to the sorting surface of the sorting belt, a flowing film is formed on the sorting surface of the sorting belt, and the subsequent liquid drops falling on the flowing film can also play a role in stirring minerals in the flowing film, so that the layering of mineral particles is facilitated.

The further technical scheme is that the belt speed is 60-130 mm/s. After the magnet unit is installed, the stress difference between the magnetic minerals and the gangue is increased, and the speed of the sorting belt can be increased to improve the working efficiency. The speed of the sorting belt can be 60-130 mm/s, and the concentrate grade can be reduced when the speed is too high.

According to a further technical scheme, the magnet unit comprises a supporting plate and a plurality of magnet blocks arranged on the supporting plate to form a magnetic system unit, the magnetic field intensity is 2000-5000 gauss, the supporting plate is connected with the support through bolts, and the distance between the magnet unit and the sorting belt is adjusted through the bolts. Wherein through passing through bolt and leg joint with the magnet unit, the rethread bolt is adjusted the distance between magnet unit and the sorting belt, reaches the effect of adjusting sorting belt top layer magnetic field intensity. When the distance between the magnetic field unit and the sorting belt is short, the magnetic field intensity of the surface layer of the sorting belt is about 2000-5000 gauss, the magnetic field belongs to a medium-intensity magnetic field, and the magnetic field can be used for sorting weak-magnetic micro-fine-particle minerals, and some ultra-fine micro-fine-particle minerals are easy to lose along with water and cannot be sorted by a gravity concentrator alone. A medium-strength magnetic field is arranged below the sorting belt to apply magnetic force to weakly magnetic mineral particles, so that the particles can move quickly towards the belt and attach to the belt to move slowly along with water flow until the tail end of the sorting belt is flushed into a concentrate receiving groove by flushing water. Can finish the sorting of the micro-fine grade minerals. The medium-strength magnetic field can apply a downward magnetic field force to the magnetic minerals on the sorting belt, the density difference between magnetic mineral particles and non-magnetic mineral particles is equivalently increased, the flow film can be fully utilized for mineral separation, the method is favorable for accelerating the mineral sorting process, the selected mineral particle group follows the movement track of gravity mineral separation, and the processing capacity is doubled compared with that of the sorting process without the magnetic system cross-flow belt.

The further technical proposal is that the sorting belt moves from high to low along the inclined direction, and the feeder is provided with a flat ore outlet and is arranged at the upstream of the sorting belt. The technical scheme is that the ore is separated in a downstream mode, water and the gravity of ore particles naturally flow downwards, layering is finished on the separation surface of the separation belt, and separation of concentrate and tailings is finished at the discharge end and the lower inclined edge of the separation belt.

A further technical scheme is that the sorting belt inclines to one side edge, and the inclination angle of the sorting belt is 1-9 degrees. After the installation magnet unit, atress difference grow between magnetic mineral and gangue can be sorted more easily, consequently can suitably increase the side inclination who selects separately the belt, makes the tailing just discharge along the side of selecting separately the belt, and the side of selecting separately the belt can be arranged to the demand in the tailing groove.

A further technical proposal is that a flushing water pipe is arranged on the higher side edge of the sorting belt. The washing water is sprayed to the sorting belt by the washing water pipe, the upper surface of the sorting belt is used as a sorting surface to move under the action of the motor, and a laminar flow film is formed on the surface of the sorting belt under the action of water flow of the washing water pipe. The water flow direction of the flushing water pipe is directed from the higher side to the lower side of the sorting belt. The magnetic field is arranged below the sorting belt, so that the stress difference between magnetic mineral particles and gangue is larger, the mineral particles are easier to select, the possibility of improving the washing flow rate of the washing water pipe is provided, and the mineral separation efficiency can be improved.

The further technical scheme is that the distance between the magnet unit and the sorting belt is gradually increased, and the magnet unit is closest to the highest end of the sorting belt. Wherein the distance between the magnet units from high to low and the sorting belt is gradually increased from 0mm to 40 mm. The magnet unit is close to the belt at the eminence, and magnetic field size is subducted gradually and disappears, and maximum magnetic field intensity is 4000 gauss. The magnet unit has excessive slope, so that mineral particles generated by abrupt change of the magnetic field intensity can be prevented from being accumulated.

The further technical scheme is that the driving roll is magnetic, the magnetic field intensity is 8000-10000 gauss, the driving roll is arranged at the discharge end of the sorting belt, and the concentrate receiving groove is arranged below the driving roll. The magnetic field intensity can adsorb magnetic mineral particles, the magnetic mineral adsorbed on the drive roll can remove gangue and slime under the combined action of flushing of water flow and gravity, and the drive roll with magnetism has the function of sorting minerals. Through making the setting have magnetism at the drive roll of selecting separately the belt discharge end, can further accelerate the separation process, make the concentrate enter into the concentrate fast and connect and get the groove, further improve separation efficiency.

According to a further technical scheme, three blanking press rollers are arranged behind the driving roller side by side, and the sorting belt alternately bypasses the three blanking press rollers, so that the second blanking press roller is positioned above the sorting belt. The mineral is then dewatered by pressing under the action of a press roll, and slime in residual concentrate is removed to the maximum extent. The combination of the driving roller and the blanking press roller carries out the sorting and dehydration process on the minerals. The drive roll sets up the discharge end at the separation belt, and the concentrate connects the groove setting in unloading compression roller below. The sorting belt alternately winds among the three blanking press rolls, can further remove moisture and mud in the concentrate, and sends the concentrate to a concentrate collecting tank.

The utility model discloses a principle is elucidated: the magnet unit is additionally arranged on the cross-flow belt concentrator, downward magnetic force is provided for the minerals to be sorted, and then the stress difference among magnetic mineral particles, other mineral particles or gangue is improved, namely the density difference between the magnetic concentrate particles and the gangue is improved, and the application of the strong magnetic power roller can further improve the concentrate quality and increase the processing capacity. The flushing water flow of the flushing water pipe is increased, and the sorting efficiency is further improved.

The above technical scheme of the utility model has following profitable technological effect:

1. the magnetic field is added to increase the stress difference of particles in the ore pulp and accelerate the layering process.

2. The micro-fine particle mineral particles are easier to be close to the sorting surface due to the existence of the acting force of the magnetic field, the recovery rate of the micro-fine particle level mineral is greatly improved, and the compactness among the layered mineral particles is enhanced due to the existence of the magnetic field.

3. The sorting process is accelerated, the density difference is increased, the quality of the concentrate is improved, the pressure intensity of the minerals on the sorting surface is increased, the sorting efficiency can be improved again by using a mode of increasing the flushing water flow, the treatment capacity is improved, and the metal recovery rate is improved.

4. The driving roller at the blanking end has strong magnetism, so that the layered minerals are easier to separate, and the quality of the concentrate is further improved.

Drawings

Fig. 1 is a schematic structural view according to embodiment 1 of the present invention;

fig. 2 is a side view according to embodiment 1 of the present invention;

fig. 3 is a front view according to embodiment 1 of the present invention;

fig. 4 is a top view according to embodiment 1 of the present invention;

fig. 5 is a cross-sectional view according to embodiment 1 of the present invention;

fig. 6 is a schematic structural diagram according to embodiment 2 of the present invention;

fig. 7 is a sectional view according to embodiment 2 of the present invention.

Reference numerals: 1: a frame; 2: a sorting belt mechanism; 3: a feeder; 4: flushing the water pipe; 5: a spraying device; 6: a magnet unit; 7: a concentrate flushing pipe; 21: a sorting belt; 22: a drive roll; 23: a driven roller; 24: a compression roller; 25: a tailing tank; 26: a concentrate receiving tank; 27: blanking press rolls; 61: a support plate; 63: and (4) bolts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Example 1

As shown in fig. 1 to 4, the magnetic-gravity combined belt concentrator comprises a frame 1 and a separation belt mechanism 2 installed on the frame 1, wherein a feeder 3 is arranged above a separation belt 21. The sorting belt mechanism 2 includes a sorting belt 21, a drive roller 22, a driven roller 23, and a press roller 24 provided below the sorting belt 21, which are provided at both ends of the sorting belt 21. The sorting belt 21 is inclined towards one end, and the inclination angle is 1.5 degrees; the sorting belt 21 is also inclined to one side edge, the inclination angle is 8 degrees, and a flushing water pipe 4 is arranged on the higher side edge of the sorting belt 21. The sorting belt 21 moves from high to low, the driving roller 22 is arranged at the lower end, the driving roller 22 is magnetic, and the magnetic field intensity is 10000 Gauss. The ore outlet of the ore feeder 3 is arranged at the upstream of the sorting belt 21 in a flat shape, and the included angle between the ore feeding direction and the moving direction of the sorting belt 21 is 45 degrees. A tailing tank 25 and a concentrate receiving tank 26 are arranged below the sorting belt 21; the concentrate receiving groove 26 is arranged below the discharge end of the sorting belt 21 and is provided with three discharging pressing rollers 27, and the sorting belt 21 alternately bypasses the three discharging pressing rollers 27, so that the second discharging pressing roller 27 is positioned above the sorting belt 21. A concentrate flushing pipe 7, which is aligned with the turning rolls, is also provided to flush concentrate into the concentrate receiving tank 26. A tailings trough 25 is provided below the lower side of the sorting belt 21. A spraying device 5 is arranged above the sorting belt 21 and sprays water mist to the sorting belt 21; the spraying direction of the spraying device 5 is perpendicular to the sorting belt 21. For better illustration of the conveyor belt 21 and other components, the spraying device 5 is only shown in fig. 5, and the spraying device 5 is a grid-shaped pipeline arranged above the sorting belt 21, and uniformly arranged spraying heads are arranged below the pipeline. Sorting belt 21 below installs magnet unit 6, and magnet unit 6 comprises a plurality of magnet pieces are installed on layer board 61, and all magnet pieces paramagnetic arrange, layer board 61 pass through bolt 63 with leg joint, and pass through bolt 63 adjusts magnet unit 6 with the distance between the sorting belt 21, the magnetic field intensity of magnetic system is 5000 gausses, does not arrange magnet unit 6 for ore mouthful below. The distance between the magnet unit 6 and the sorting surface of the sorting belt 21 was 20 mm. When in use, as shown in fig. 3, the sorting belt 21 moves in the direction of a hollow arrow, the belt speed is 130mm/s, ore pulp is obliquely fed onto the sorting surface of the sorting belt 21 of the feeding channel by the ore feeder 3, under the action of the sorting belt 21, nonmagnetic light minerals and ore mud on the upper layer are rapidly separated and flow into a tailing tank, the magnetic minerals are adsorbed by the magnetic field of the magnetic driving roller and move along with the driving roller, and then the magnetic minerals are extruded and dehydrated by the three blanking compression rollers 27, so that the ore mud in the magnetic minerals is fully removed. The movement of the slurry is shown by the curved arrows and the tailings will quickly fall into the tailings trough 25. The concentrate will then fall with the separator belt 21 longer into the concentrate receiving trough 26.

The magnetic-gravity combined belt concentrator provided by the embodiment 1 is used for sorting the strong magnetic minerals, the density of gangue in the minerals to be sorted is 2.6 g/cubic centimeter, the density of hematite is 5-5.2 g/cubic centimeter, the gangue after entering a magnetic field is approximate to non-magnetism and cannot be acted by magnetic field force, the hematite is acted by the magnetic field force, the density is increased to be more than 8 g/cubic centimeter after gravity is added, extremely favorable conditions are provided for accelerating the gravity separation process, and conditions are created for improving the treatment capacity by gravity separation. The requirement on the magnetic field intensity is much lower than the magnetic separation opportunity, and the magnetic separation machine can effectively separate weak magnetic minerals with the magnetic field intensity generally larger than 1T, 1.2T, even more than 1.8T. To obtain higher magnetic field strengths, either electromagnetic or rare earth permanent magnets require higher manufacturing processes and higher manufacturing costs. This also enables a significant reduction in the manufacturing costs of the concentrator.

Example 2

As shown in fig. 6 and 7, a magnetic-gravity combined belt concentrator is a further improvement of embodiment 1, and is different from embodiment 1 in that a separation belt 21 moves from high to low along an inclined direction, the inclination angle of the belt to a main roller direction is 10 degrees, and the separation belt 21 is not inclined to one side any more. The distance between the magnet unit 6 and the belt 21 is gradually increased from 0 to 40mm, the magnetic field size is gradually reduced and disappears, and the maximum magnetic field intensity is 4000 gauss. The ore outlet of the ore feeder 3 is arranged at the high end of the sorting belt 21, and the ore outlet angle of the ore outlet is vertical to the movement of the sorting belt 21. The separation of minerals is carried out in a concurrent flow mode, the driving roller 22 is arranged at the lower end, namely the discharge end, of the separation belt 21, the concentrate receiving groove 26 is arranged below the driving roller 22, and the concentrate flushing pipe 7 is arranged to flush concentrate into the concentrate receiving groove 26. The tailing trough 25 is arranged below the two lower side edges of the sorting belt 21 and is L-shaped. For better illustration of the conveyor belt 21 and other components, the spraying device 5 is only shown in fig. 7, and the spraying device 5 is a grid-shaped pipeline arranged above the sorting belt 21, and uniformly arranged spraying heads are arranged below the pipeline.

When the device is used, as shown in fig. 5, the separation belt 21 moves in the direction of a hollow straight arrow, the belt speed is 200mm/s, ore pulp is obliquely fed onto the separation surface of the separation belt 21 of the feeding channel by the ore feeder 3, the ore pulp moves towards the lower end of the separation belt 21 on the separation belt 21, and the ore pulp is layered in the flowing process on the belt surface due to the common acting force of magnetic field force, gravity and water flow. The non-magnetic minerals and sludge in the upper layer flow directly into the tailings pond 25. The ore concentrate moves longer along with the separation belt 21, all tailings are taken away at the lower end of the main roller by the action of ore pulp flow and flushing water flow, the ore concentrate moving along with the magnetic driving roller 22 is squeezed and dehydrated by the driving roller 22 and the blanking compression roller 27, and after residual slime is removed, the ore concentrate is unloaded by the next blanking compression roller 27 and falls into the ore concentrate receiving groove 26.

The ore dressing process of the magnetic-gravity combined belt concentrator is characterized in that ore pulp in a dispersion state is fed onto the ore dressing surface of the sorting belt 21, the density difference between a mineral particle group and a gangue particle group is increased by means of a magnetic field acting force, the density difference is larger than that of the ore pulp without the magnetic field acting force, so that the ore pulp layering speed is increased in the traditional gravity ore dressing process, heavy minerals in the lower layer after being layered are slow in movement speed relative to the ore dressing surface due to the existence of the magnetic field acting force, and accordingly the separation speed between the mineral particle group and the gangue particle group is increased. The magnetic-gravity combined belt sorter has higher efficiency than the traditional gravity mineral separation, and certainly, the processing capacity is also higher. Due to the layering effect, the magnetic system inclusion and mechanical inclusion which are difficult to solve in the magnetic separation process of the traditional magnetic separator are effectively overcome. Although the processing capacity is smaller than that of the existing magnetic separator, the sorting effect is better than that of the existing magnetic separator, and the effect of three-time continuous sorting of the traditional magnetic separator can be achieved by one-time sorting.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A magnetic-gravity combined belt concentrator comprises a rack (1) and a separation belt mechanism (2) installed on the rack (1), wherein the separation belt mechanism (2) comprises a separation belt (21), a driving roller (22) and a driven roller (23) which are arranged at two ends of the separation belt (21) and a plurality of compression rollers (24) arranged below the separation belt (21), and an ore feeder (3) is arranged above the separation belt (21), and the magnetic-gravity combined belt concentrator is characterized in that a tailing groove (25) and a concentrate receiving groove (26) are arranged below the separation belt (21) and incline towards one end of the separation belt (21); a spraying device (5) is arranged above the sorting belt (21) and sprays water mist to the surface of the sorting belt (21); and a magnet unit (6) is arranged below the sorting belt (21).

2. A magnetic-gravity belt concentrator as claimed in claim 1, wherein the spraying direction of the spraying apparatus (5) is perpendicular to the classifying belt (21).

3. A magnetic-gravity belt concentrator as claimed in claim 1 wherein the velocity of the classifying belt (21) is 60 to 130 mm/s.

4. A magnetic-gravity combined belt concentrator as claimed in claim 1, wherein the magnet unit (6) comprises a supporting plate (61) and a plurality of magnet blocks arranged on the supporting plate (61), the magnetic field strength of the magnet blocks is 2000-5000 gauss, the supporting plate (61) is connected with the frame by bolts (63), and the distance between the magnet unit (6) and the sorting belt (21) is adjusted by the bolts (63).

5. A magnetic-gravity combined belt concentrator as claimed in claim 4, wherein the classifying belt (21) moves from high to low in an inclined direction, and the feeder (3) has a flat ore outlet disposed upstream of the classifying belt (21).

6. A magnetic-gravity combined belt concentrator as claimed in claim 5 wherein the classifying belt (21) is inclined to one side at an angle of 1 to 9 °.

7. A magnetic-gravity belt concentrator as claimed in claim 5, wherein the upper side of the classifying belt (21) is provided with a flushing water pipe (4).

8. A magnetic-gravity belt concentrator as claimed in claim 5, wherein the magnet units (6) are progressively more distant from the classifying belt (21) and are closest at the highest end of the classifying belt (21).

9. A magnetic-gravity combined belt concentrator as claimed in claim 1, wherein the drive roll (22) is magnetic and has a magnetic field strength of 8000-10000 gauss, the drive roll (22) is arranged at the discharge end of the separation belt (21), and the concentrate receiving trough (26) is arranged below the drive roll (22).

10. A magnetic-gravity combined belt concentrator as claimed in claim 9, wherein three blanking press rollers (27) are arranged side by side behind the drive roller (22), the sorting belt (21) is passed around the three blanking press rollers (27) alternately, so that the second blanking press roller (27) is above the sorting belt (21).

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