Screening system for protecting high-pressure roller mill

Abstract

The utility model relates to a screening system for protecting a high-pressure roller mill. The screening system comprises a feeding sealing-tape machine, a first roller type screening machine, a plow discharger, an iron removal chute, an impurity chute and a metal detector, the feeding sealing-tape machine and the first roller type screening machine are both arranged above a buffer ore groove of the high-pressure roller mill, one end of the first roller type screening machine is located below the discharging end of the feeding sealing-tape machine, and the other end of the first roller type screening machine is connected with the sundry chute. The plow discharger is arranged above the feeding sealing-tape machine, and the iron removal chute is arranged below the feeding sealing-tape machine; the metal detector is arranged on the feeding adhesive tape machine; the screening system can solve the problem of high iron removal cost of the iron remover.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure roller mills, in particular to a screening system for protecting high-pressure roller mills. Background Art

[0002] The raw material of iron ore for producing pellets is often that the particle size and specific surface area do not meet the requirements of pelletizing. Therefore, it is necessary to add a roller pressing process to the production line to reduce the particle size of the iron ore and increase the specific surface area of ​​the iron ore. The high pressure roller mill is an important equipment in the roller pressing process. Its working principle is to push two large metal rollers with several special material studs on the surface through a hydraulic mechanism, so that the two metal rollers can adjust the gap between the two rollers according to the amount of material to be processed.

[0003] The impurities in the iron ore concentrate have a very destructive effect on these special material nails. If the number of these nails damaged increases to a certain proportion, they must be replaced. These nails are made of special materials and are expensive, so it is necessary to take effective measures to prevent the high pressure roller mill nails from being damaged.

[0004] Iron concentrate is usually mixed with some large pieces of materials, and other metal debris is often mixed in during transportation and storage. When these debris enter the high pressure roller mill, it is easy to damage the column nails.

[0005] If these impurities in the iron ore concentrate can be effectively screened out before entering the high pressure grinding roller, damage to the high pressure grinding roller can be avoided and its life can be extended.

[0006] The Chinese utility model patent with the authorization announcement number CN202028455U discloses "a debris removal device for a high-pressure roller mill". The patent removes large pieces of debris or metals from the debris by adding an iron remover and a roller screening machine. However, the iron remover itself is expensive, difficult to install, and requires constant maintenance, resulting in high costs. Summary of the invention

[0007] The utility model provides a screening system for protecting a high-pressure roller mill. The screening system can solve the problem of high iron removal cost of the above-mentioned iron remover.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A screening system for protecting a high-pressure roller mill, comprising a feeding belt conveyor, a first roller screening machine, a plow discharger, an iron removal chute, a debris chute, and a metal detector;

[0010] The feeding belt conveyor and the first roller screening machine are both arranged above the buffer ore bin of the high-pressure roller mill. One end of the first roller screening machine is located below the discharging end of the feeding belt conveyor, and the other end is connected to the sundry chute. The plough-type discharger is arranged above the feeding belt conveyor, and the iron removal chute is arranged below the feeding belt conveyor. The metal detector is arranged on the feeding belt conveyor.

[0011] The iron removal chute includes a first chute inclinedly arranged below the feeding belt conveyor, a second roller screening machine arranged at the upper part of the first chute, and a second chute arranged below the second roller screening machine. The discharging end of the first chute is connected to the sundry collection box. A return belt conveyor is arranged below the discharging end of the second chute, and the discharging end of the return belt conveyor is located above the first roller screening machine.

[0012] The sundry chute includes a third chute inclinedly arranged at one end of the first roller screening machine, a third roller screening machine arranged at the upper part of the third chute, and a fourth chute arranged below the third roller screening machine. The discharging end of the third chute is connected to the sundry collection box. A finished product belt conveyor is arranged below the discharging end of the fourth chute, and the discharging end of the finished product belt conveyor is located above the buffer ore bin.

[0013] The first roller screening machine, the second roller screening machine, and the third roller screening machine are all roller screening machines driven independently by a single roller.

[0014] Disks are equally spaced on the roller shafts of the first roller screening machine, the second roller screening machine, and the third roller screening machine, and the disks arranged on adjacent two roller shafts are arranged in an interlaced manner.

[0015] A screening system for protecting a high-pressure roller mill further includes a controller. The metal detector is electrically connected to the controller, and the controller is electrically connected to the plough-type discharger.

[0016] The controller is a PLC controller.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1) When the iron concentrate on the feeding belt conveyor contains metal sundries, after being detected by the metal detector, the iron concentrate containing metal sundries is discharged into the iron removal chute through the plough-type discharger. The second roller screening machine in the iron removal chute screens the metal and large sundries to achieve the purpose of removing metal sundries. The present utility model uses a plough-type discharger and an iron removal chute to replace the iron remover, which can reduce the equipment cost and maintenance cost.

[0019] 2) In the present utility model, a return belt conveyor is arranged below the discharging end of the second chute in the iron removal chute, and the discharging end of the return belt conveyor is located above the first roller screening machine, so that the iron concentrate after removing metal sundries can be screened again to screen out the missed sundries again.

[0020] 3) When the iron concentrate on the feeding belt conveyor does not contain metallic sundries, the iron concentrate directly falls onto the first roll screen for screening. Then, the materials on the screen can be screened again through the third roll screen in the sundries chute, avoiding the direct waste of qualified iron concentrate on the screen of the first roll screen and improving the utilization rate of materials.

[0021] 4) Discs are arranged at equal intervals on the roll shafts of the roll screens of the present utility model. When blockage and sticking occur, the rotating discs can play a role in unblocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0023] Figure 1 is a schematic structural diagram of a screening system for protecting a high-pressure roll mill of the present utility model.

[0024] Figure 2 is a schematic diagram of the discs of the first roll screen of the present utility model.

[0025] DESCRIPTION OF THE REFERENCE NUMERALS:

[0026] In the figure: 1. Feeding belt conveyor; 2. First roll screen; 3. Plough-type discharger; 4. Iron removal chute; 5. Sundries chute; 6. Disc; 7. Buffer ore bin; 8. Sundries collection box; 41. First chute; 42. Second roll screen; 43. Second chute; 44. Returning material belt conveyor; 51. Third chute; 52. Third roll screen; 53. Fourth chute; 54. Finished product belt conveyor DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] The following further describes the detailed embodiments of the present utility model with reference to the drawings:

[0029] Embodiment 1

[0030] As Figure 1 , Figure 2 shown, a screening system for protecting a high-pressure roll mill of the present utility model includes a feeding belt conveyor 1, a first roll screen 2, a plough-type discharger 3, an iron removal chute 4, a sundries chute 5, and a metal detector.

[0031] The feeding belt conveyor 1 and the first roller screen 2 are both arranged above the buffer ore bin 7 of the high-pressure roller mill, and one end of the first roller screen 2 is located below the discharging end of the feeding belt conveyor 1, and the other end is connected to the sundry chute 5. The plough-type discharger 3 is arranged above the feeding belt conveyor 1, and the iron removal chute 4 is arranged below the feeding belt conveyor 1. The metal detector is arranged on the feeding belt conveyor 1.

[0032] The iron removal chute 4 includes a first chute 41 inclined and arranged below the feeding belt conveyor, a second roller screen 42 arranged on the upper part of the first chute, and a second chute 43 arranged below the second roller screen. The discharging end of the first chute 41 is connected to the sundry collection box 8, and a return belt conveyor 44 is arranged below the discharging end of the second chute 43, and the discharging end of the return belt conveyor 44 is located above the first roller screen 2.

[0033] The sundry chute 5 includes a third chute 51 inclined and arranged at one end of the first roller screen, a third roller screen 52 arranged on the upper part of the third chute, and a fourth chute 53 arranged below the third roller screen. The discharging end of the third chute 51 is connected to the sundry collection box 8, and a finished product belt conveyor 54 is arranged below the discharging end of the fourth chute 53, and the discharging end of the finished product belt conveyor 54 is located above the buffer ore bin 7.

[0034] The first roller screen 2, the second roller screen 42 and the third roller screen 52 are all roller screens driven independently by a single roller. Discs 6 are equidistantly arranged on the roller shafts of the first roller screen 2, the second roller screen 42 and the third roller screen 52, and the discs 6 arranged on adjacent two roller shafts are arranged in an interlaced manner.

[0035] The working process of a screening system for protecting a high-pressure roller mill provided by the present utility model is as follows:

[0036] When the iron concentrate on the feeding belt conveyor 1 contains metal sundries, after being detected by the metal detector, the iron concentrate containing metal sundries is unloaded into the iron removal chute 4 through the plough-type discharger 3, and the metal and large sundries are screened by the second roller screen 42 in the iron removal chute to achieve the purpose of removing metal sundries; the metal and large sundries on the screen of the second roller screen 42 fall into the sundry collection box 8 through the first chute 41, and the iron concentrate under the screen of the second roller screen 42 passes through the second chute 43 and the return belt conveyor 44 in the iron removal chute and is sent to the first roller screen 2 for screening again to screen out the missed sundries again; the sundries on the screen of the first roller screen 2 can be screened for the third time through the third roller screen 52 in the sundry chute, and then the sundries on the screen of the third roller screen 52 fall into the sundry collection box 8 through the third chute 51, and the iron concentrate under the screen passes through the fourth chute 53 and the finished product belt conveyor 54 and enters the buffer ore bin 7.

[0037] When the iron concentrate on the feeding belt conveyor 1 does not contain metallic impurities, the iron concentrate directly falls onto the first roller screen 2 for screening. Then, the materials on the screen can be screened again by the third roller screen 52 in the impurity chute. Then, the impurities on the screen of the third roller screen 52 fall into the impurity collection box 8 through the third chute 51, and the screened iron concentrate enters the buffer ore bin 7 through the fourth chute 53 and the finished product belt conveyor 54.

[0038] Embodiment 2

[0039] On the basis of the above embodiment, a PLC controller is added, and the metal detector is electrically connected to the controller. The PLC controller is electrically connected to the plough-type tripper.

[0040] When the metal detector detects that the iron concentrate on the feeding belt conveyor contains metallic impurities, the plough-type tripper 3 is controlled to start working through the PLC controller, which can improve the working efficiency.

[0041] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention. In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods. In addition, any combination can be made between different embodiments of the present invention as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A screening system for protecting a high-pressure roller mill, characterized in that It includes a feeding belt conveyor, a first roller screen, a plough-type discharger, an iron removal chute, a sundry chute, and a metal detector; Both the feeding belt conveyor and the first roller screen are arranged above the buffer ore bin of the high-pressure roller mill. One end of the first roller screen is located below the discharging end of the feeding belt conveyor, and the other end is connected to the sundry chute. The plough-type discharger is arranged above the feeding belt conveyor, and the iron removal chute is arranged below the feeding belt conveyor. The metal detector is arranged on the feeding belt conveyor; The iron removal chute includes a first chute inclined and arranged below the feeding belt conveyor, a second roller screen arranged at the upper part of the first chute, and a second chute arranged below the second roller screen. The discharging end of the first chute is connected to a sundry collection box, and a return belt conveyor is arranged below the discharging end of the second chute. The discharging end of the return belt conveyor is located above the first roller screen.

2. The screening system for protecting a high-pressure roller mill according to claim 1, characterized in that The sundry chute includes a third chute inclined and arranged at one end of the first roller screen, a third roller screen arranged at the upper part of the third chute, and a fourth chute arranged below the third roller screen. The discharging end of the third chute is connected to the sundry collection box, and a finished product belt conveyor is arranged below the discharging end of the fourth chute. The discharging end of the finished product belt conveyor is located above the buffer ore bin.

3. The screening system for protecting a high-pressure roller mill according to claim 2, characterized in that, The first roller screen, the second roller screen, and the third roller screen are all roller screens independently driven by a single roller.

4. A screening system for protecting a high-pressure roller mill according to claim 2, characterized in that Disks are evenly spaced on the roller shafts of the first roller screen, the second roller screen, and the third roller screen, and the disks arranged on adjacent two roller shafts are arranged in an interlaced manner.

5. A screening system for protecting a high-pressure roller mill according to claim 1, characterized in that, It further includes a controller; the metal detector is electrically connected to the controller; the controller is electrically connected to the plough-type discharger.

6. A screening system for protecting a high-pressure roller mill according to claim 5, wherein, The controller is a PLC controller.

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