A protection device for a crushing equipment

Abstract

The present invention relates to a protection device for a crushing equipment, which comprises a coarse crushing unit and a iron removal unit, and the coarse crushing unit is above the iron removal unit; the iron removal unit comprises a feeding box, and two groups of iron removal disc groups are symmetrically arranged on both sides of the feeding box in a mirror image manner. Each iron removal disc group is composed of a plurality of magnetic discs, and the magnetic discs can rotate at a high speed to form a centrifugal force, and the disc surfaces of the magnetic discs face the side of the material flow directly below the coarse crushing unit. The present invention integrates the iron removal equipment and the crushing equipment into a whole, without the need to separately set up the iron removal equipment, thus occupying a small space in the factory building and reducing the equipment cost and the workshop investment.

Description

Technical Field

[0001] The present invention relates to the technical field of ore crushing in concentrator plants, and particularly relates to a protection device for crushing equipment. Background Art

[0002] Currently, most non-magnetic ore species are disseminated in relatively fine grains and ultimately need to undergo grinding and separation to obtain high-quality concentrate products. The ore mined from the stope generally has a maximum particle size of 600 - 1200 mm, while the feed particle size for grinding is generally below 12 mm. This requires us to set up a crushing operation before grinding.

[0003] Generally, the mined ore needs to undergo continuous three to four stages of crushing before entering grinding to make its particle size meet the requirements for grinding. Medium crushing, fine crushing, and ultrafine crushing other than coarse crushing are restricted by the small feed particle size, and the width of their crushing chambers is also small. Such crushing chambers are easily blocked by various iron objects mixed in, resulting in damage to the crusher. Therefore, the feed for medium crushing, fine crushing, and ultrafine crushing must undergo a de-ironing operation to protect the crusher. This requires a de-ironing operation for the discharge of the coarse crusher.

[0004] The current de-ironing operation generally involves suspending an independent disk-type de-ironer or belt-type de-ironer above the feed belt of the crusher after coarse crushing. This method of using an independent de-ironing device has large equipment specifications, occupies a large space, and has high equipment purchase and workshop investment.

[0005] The most common current coarse crushing equipment includes jaw crushers, single-tooth roll crushers, and double-tooth roll crushers. The discharge of these crushers is all strip-shaped discharge vertically downward along the long strip-shaped discharge port. If de-ironing can be carried out at the discharge of the crusher and the de-ironing equipment and the crushing equipment can be integrated into a single device that occupies a small space in the workshop, this will eliminate the need for additional de-ironing equipment and reduce equipment investment and workshop investment. Summary of the Invention

[0006] The purpose of the present invention is to provide a protection device for crushing equipment, which integrates the de-ironing equipment and the crushing equipment into a single unit, eliminating the need for an independent de-ironing device, occupying a small space in the workshop, and reducing equipment costs and workshop investment.

[0007] To achieve the above purpose, the present invention is implemented by adopting the following technical solutions:

[0008] A protection device for crushing equipment includes a coarse crushing unit and a de-ironing unit. The coarse crushing unit is above the de-ironing unit. The de-ironing unit includes a feed box, and two groups of de-ironing disk groups are symmetrically arranged on both sides of the feed box in a mirror image. Each de-ironing disk group consists of several magnetic disks that can rotate at high speed to form a centrifugal force, and the disk surfaces of the magnetic disks face the side of the material flow directly below the coarse crushing unit.

[0009] Below the feeding box, there are iron impurity discharge troughs and ore discharge troughs. The iron impurity discharge troughs are arranged below the iron removal disc group, and the ore discharge trough is between two groups of iron impurity discharge troughs.

[0010] The distance from the lower vertex of the iron removal disc group to the lower iron impurity discharge trough below is 500 - 600 mm, and the diameter of the magnetic disc is 300 - 500 mm.

[0011] A discharge chute is connected between the coarse crushing unit and the iron removal unit. After the discharge chute is connected to the feeding box, a vertically connected material flow channel is formed. The iron removal disc group is on both sides of the material flow channel.

[0012] In each group of iron removal disc groups, 4 - 6 magnetic discs are arranged at equal intervals in a row in the horizontal direction.

[0013] The disc surface of the magnetic disc is an electromagnet disc surface. The magnetic field intensity at the central part of the electromagnet disc surface is greater than that at the peripheral part. The magnetic field intensity at the inner ring with a diameter of 100 mm in the middle is 50 - 100 mT. Each ring with an outer expansion of 50 mm is a magnetic field intensity unit, and the magnetic field intensity is 1 / 2 of the immediately adjacent inner ring, and the magnetic field intensity decreases by half successively towards the outer ring.

[0014] The surface of the electromagnet disc is lined with a wear-resistant rubber layer with a thickness of 10 - 20 mm.

[0015] The magnetic disc is driven by a motor to rotate at a speed of 100 - 300 revolutions per minute.

[0016] It also includes a frame. The coarse crushing unit and the iron removal unit are fixedly connected up and down as a whole through the frame.

[0017] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0018] 1) The crushing equipment protection device of the present invention arranges the coarse crushing unit and the iron removal unit vertically up and down, and connects the two units to a common frame to form an integral equipment. This arrangement does not require additional independent iron removal equipment, and the equipment structure of the present invention is compact and occupies less land, thereby reducing equipment investment and plant investment.

[0019] 2) The device of the present invention removes iron by arranging iron removal discs on both sides of the material flow. This method uses the magnetic force of the iron removal discs to first adsorb the iron impurities in the material flow on their surfaces, and then uses the centrifugal force generated by the rotation of the iron removal discs to throw the iron impurities away from each side of the iron removal disc group, and finally falls into the iron impurity discharge troughs on both sides at the lower part of the feeding box and is discharged to complete iron removal, thereby avoiding equipment damage to the subsequent crushing equipment caused by over-ironing and protecting the subsequent crushing equipment.

[0020] 3) In the device of the present invention, the disk magnetic field faces the material flow. The magnetic field at the peripheral edge of the iron removal disk is small, resulting in a relatively small magnetic field in the vertical direction of the entire iron removal disk group. In addition, the iron removal disk group is 500 - 600 mm away from the iron and impurity discharge chute below. The large clearance in the large space causes a further significant attenuation of the already weak magnetic field below the iron removal disk. Eventually, the magnetic field strength at the iron and impurity discharge area at the lower part of the feed box is not sufficient to form a re-adsorption of iron and impurities, ensuring the smooth discharge of iron and impurities. This structure realizes the continuous operation of iron removal and the discharge of iron and impurities, thus avoiding the power-off interval caused by the intermittent method of first adsorption and then power-off for impurity discharge, and the leakage of iron and impurities. It completely protects the subsequent crushing equipment from being damaged by over-ironing.

[0021] 4) The iron removal disks of the present invention are arranged at intervals in the material flow length direction. This ensures iron removal in the entire length direction of the material flow. The method of multiple iron removal disks greatly reduces the diameter of a single iron removal disk, thereby correspondingly reducing the diameter of the feed box, making the entire equipment smaller, more compact, and having lower equipment investment.

[0022] 5) In the device of the present invention, two iron removal disk groups are arranged symmetrically in mirror image on both sides in the material flow width direction. In this way of sandwich-type iron removal, a single iron removal disk group is equivalent to undertaking iron removal for 1 / 2 of the material flow width. This avoids the attenuation of the magnetic field strength in the material flow width direction during single-sided iron removal, resulting in the situation where iron and impurities at the material flow boundary cannot be adsorbed and removed. Therefore, the sandwich-type iron removal method of the present invention has thorough iron removal and effectively protects the subsequent crushing equipment.

[0023] 6) The current of the iron removal disk and the frequency conversion signal of the rotating motor of the present invention can both be adjusted, thereby adjusting the magnetic field strength of the iron removal disk and the rotation speed of the iron removal disk, that is, adjusting the magnetic force and centrifugal force of the iron removal disk, so as to optimize the composite force field to the best to achieve different iron removal working conditions and ensure the iron removal effect.

[0024] 7) The partition plate arranged at the upper end between the iron and impurity discharge chute and the ore discharge chute of the present invention prevents the escaped iron and impurities from falling into the adjacent ore discharge chute, further ensuring the iron removal effect.

[0025] 8) The surface of the iron removal disk of the present invention is lined with rubber 10 - 20 mm thick, which avoids the wear of the electromagnetic plate of the iron removal disk and prolongs the service life of the iron removal disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the schematic diagram of the system structure of the present invention.

[0027] Figure 2 is Figure 1 the partial enlarged view of...

[0028] Figure 3 is Figure 2 the view in the A - A direction of...

[0029] In the figure: 1 - frame, 2 - outer shell box, 3 - toothed roller, 4 - transmission part, 5 - base, 6 - upper platform, 7 - feed box, 8 - iron removal disc group, 9 - receiving chute, 10 - discharge chute, 11 - magnetic disc, 12 - rotating shaft, 13 - bearing seat, 14 - support beam, 15 - rotating motor, 16 - electromagnet disc surface, 17 - wear-resistant rubber layer, 18 - partition plate, 19 - iron impurity discharge chute, 20 - ore discharge chute. Specific implementation manner

[0030] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] See Figures 1 - 3 As shown, a protection device for a crushing device includes a coarse crushing unit and an iron removal unit, and the coarse crushing unit is above the iron removal unit; the iron removal unit includes a feed box 7, and two groups of iron removal disc groups 8 are arranged symmetrically on both sides of the feed box 7. The iron removal disc group 8 is composed of a number of magnetic discs 11. The magnetic discs 11 can rotate at high speed to form a centrifugal force, and the disc surface of the magnetic disc 11 faces the side of the material flow directly below the coarse crushing unit.

[0032] An iron impurity discharge chute 19 and an ore discharge chute 20 are provided below the feed box 7. The iron impurity discharge chute 19 is arranged below the iron removal disc group 8, and the ore discharge chute 20 is between the two groups of iron impurity discharge chutes 19.

[0033] The distance between the iron removal disc group 8 and the lower iron impurity discharge chute is 500 - 600 mm, and the diameter of the magnetic disc 11 is 300 - 500 mm.

[0034] A discharge chute 10 is connected between the coarse crushing unit and the iron removal unit. After the discharge chute 10 is connected to the feed box 7, an up-and-down connected material flow channel is formed, and the iron removal disc group 8 is on both sides of the material flow channel.

[0035] In each iron removal disc group 8, 4 - 6 magnetic discs 11 are arranged in a row at equal intervals in the horizontal direction.

[0036] The disc surface of the magnetic disc 11 is an electromagnet disc surface 16. The magnetic field intensity at the central part of the electromagnet disc surface 16 is greater than that at the peripheral part. The magnetic field intensity at every point in the inner ring with a diameter of 100 mm in the middle is 50 - 100 mT. Each ring with an outer expansion of 50 mm is a magnetic field intensity unit, and the magnetic field intensity is 1 / 2 of the immediately adjacent inner ring, and the magnetic field intensity gradually decreases by half for each successive outer ring.

[0037] The surface of the electromagnet disc surface 16 is lined with a wear-resistant rubber layer 17 with a thickness of 10 - 20 mm.

[0038] The magnetic disc 11 is driven by a motor to rotate, and the rotation speed is 100 - 300 revolutions per minute.

[0039] It also includes a frame 1. The coarse crushing unit and the iron removal unit are fixedly connected up and down as a whole through the frame 1.

[0040] The crushing unit adopts a traditional jaw crusher, single-tooth roll crusher or double-tooth roll crusher (hereinafter taking the double-tooth roll crusher as an example). The crushing unit mainly consists of a housing box 2, two toothed rolls 3 and a transmission part 4. The base 5 of the crushing unit is bolted to the upper platform 6 of the frame 1.

[0041] The iron removal unit consists of a feeding box 7 and two iron removal disc groups 8 arranged symmetrically on both sides below the discharge opening of the crusher.

[0042] The feeding box 7 is a box structure. The feeding box 7 is flange-connected to the discharge chute 10 through a long receiving chute 9 welded at the middle position of its top. The discharge chute 10 is flange-connected to the discharge opening of the crusher. Two sets of exactly the same iron removal disc groups 8 are arranged mirror-symmetrically along the length direction on the left and right sides in the width direction below the receiving chute 9 in the feeding box 7. The following takes the left iron removal disc group as an example for description.

[0043] The left iron removal disc group consists of 4 - 6 magnetic discs 11 arranged at equal intervals. Each magnetic disc 11 is circular, and its disc surface faces the side of the material flow directly below the receiving chute 9. The arrangement height of each disc surface and the distance from the material flow are the same.

[0044] Each magnetic disc 11 is connected to a support beam 14 welded to the end face of the feeding box 7 through a bearing seat 13 of its rotating shaft 12. The rotating motor 15 of each magnetic disc 11 is externally placed outside the end plate of the feeding box 7 and connected to the support beam.

[0045] One side of the magnetic disc 11 facing the material flow is an electromagnet disc surface 16, and the magnetic field intensity is 50 - 100 mT. The magnetic field intensity can be adjusted by the supply current. A wear-resistant rubber layer 17 with a thickness of 10 - 20 mm is lined on the surface of the electromagnet disc surface 16.

[0046] The rotating motor of the magnetic disc 11 is a variable-frequency motor, and its speed is adjustable from 100 to 300 revolutions. The rotating motor and current signal of the magnetic disc 11 are connected to the control system. [[ID=(22]]

[0047] On both sides of the lower part of the feeding box 7, side iron impurity discharge chutes 19 are respectively provided, and an ore discharge chute 20 is provided in the middle. A partition plate 18 with a height of 200 - 300 mm is arranged between the upper ends of the left and right side iron impurity discharge chutes and the ore discharge chute.

[0048] The feeding box 7 is connected to the lower platform of the support through its outer base.

Claims

1. A protection device for a crushing equipment, comprising a coarse crushing unit and a iron removal unit, wherein the coarse crushing unit is above the iron removal unit; characterized in that, The iron removal unit includes a feeding box, and two groups of iron removal disc groups are arranged symmetrically on both sides of the feeding box. The iron removal disc group is composed of a number of magnetic discs, and the magnetic discs can rotate to form a centrifugal force. The disc surface of the magnetic disc faces the side of the material flow directly below the coarse crushing unit. An iron impurity discharge chute and an ore discharge chute are provided below the feeding box. The iron impurity discharge chute is arranged below the iron removal disc group, and the ore discharge chute is between the two groups of iron impurity discharge chutes. A discharge chute is connected between the coarse crushing unit and the iron removal unit. After the discharge chute is connected to the feeding box, a vertically connected material flow channel is formed. The iron removal disc group is on both sides of the material flow channel. The disc surface of the magnetic disc is an electromagnet disc surface. The magnetic field intensity at the central part of the electromagnet disc surface is greater than that at the peripheral part. The magnetic field intensity at the inner ring with a diameter of 100 mm in the middle is 50 - 100 mT. Each ring with an outer expansion of 50 mm is a magnetic field intensity unit, and the magnetic field intensity is 1 / 2 of the immediately adjacent inner ring, and the magnetic field intensity gradually decreases by half towards the outer ring.

2. The protection device for a crushing device according to claim 1, wherein, The distance from the lower vertex of the iron removal disc group to the lower iron impurity discharge chute is 500 - 600 mm, and the diameter of the magnetic disc is 300 - 500 mm.

3. A protection device for a crushing device according to claim 1, characterized in that, In each group of the iron removal disc groups, 4 - 6 magnetic discs are arranged at equal intervals in a row in the horizontal direction.

4. A protection device for a crushing device according to claim 1, characterized in that, The surface of the electromagnet disc surface is lined with a wear-resistant rubber layer with a thickness of 10 - 20 mm.

5. The protection device for a crushing device according to claim 1, characterized in that, The magnetic disc is driven to rotate by a motor, and the rotation speed is 100 - 300 revolutions per minute.

6. The protection device for a crushing device according to claim 1, characterized in that, It also includes a frame, and the coarse crushing unit and the iron removal unit are fixedly connected up and down as a whole through the frame.

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