A device for protecting rotary kiln fixed screen castable

Abstract

The utility model discloses a device for protecting rotary kiln fixed screen casting material belongs to rotary kiln fixed screen technical field, solve the fixed screen low end below casting material of steel structure long -term scouring, easy make steel structure expose in high temperature cause the problem of burning loss, specific include upper support and lower support, the upper support and lower support between the erection of several root screen body beams, and the screen body beam is located rotary kiln discharge gate below, be provided with a plurality of screen plate on the screen body beam, the passageway between two adjacent screen body beams is installed with the protection board, and the protection board is installed in the one end close to lower support, in the utility model, the protection board sets up between the screen body beam, and is located low -end's position, when the pellet that passes through high temperature calcination in the rotary kiln falls on the fixed screen, the pellet directly washes the protection board, avoids the fixed screen casting material to be washed off by the pellet and falls, protects the fixed screen of steel structure not to be burnt out even to burn through and cause the equipment accident, lets the rotary kiln stable operation.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln fixed screen technology, and in particular to a device for protecting the castable material of the rotary kiln fixed screen. Background Technology

[0002] In the pellet production process, the pellets undergo high-temperature roasting (around 1100-1200℃) in a rotary kiln. As the kiln rotates and tilts, the pellets fall onto a fixed screen, passing through the gaps in the screen beams and into a receiving hopper before being cooled on a ring cooler trolley. After three stages of cooling, the pellets are discharged through the ring cooler's discharge hopper onto a finished product conveyor belt and carried to the finished product silo. Due to the high-temperature sintering process, some sintered lumps inevitably fall onto the fixed screen and are manually removed. The fixed screen serves to prevent large sintered lumps from falling into the ring cooler, avoiding blockages and other obstructions, and is a key piece of equipment in pellet production.

[0003] During the pellet production process, the high-temperature pellets, after being roasted at high temperature in the rotary kiln, fall from the kiln head through the gaps in the screen beams. The castable material below the fixed screen at the bottom, which is used to protect the steel structure, is subjected to long-term erosion. This castable material is prone to falling off, causing the steel structure to be exposed to high temperature and erosion by the pellets, resulting in equipment accidents such as burn-through or even damage to the steel structure.

[0004] This utility model relates to a device for protecting the castable material of a rotary kiln fixed screen, preventing the castable material from being washed away by pellets and causing equipment accidents, thus ensuring the stable operation of the rotary kiln. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a device for protecting the castable refractory of a rotary kiln fixed screen, which solves the problem that the castable refractory below the lower end of the fixed screen of the steel structure is subject to long-term erosion, which easily exposes the steel structure to high temperatures and causes it to burn.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A device for protecting the castable material of a fixed screen in a rotary kiln includes an upper support and a lower support; several screen beams are erected between the upper and lower supports, and the screen beams are located below the discharge port of the rotary kiln; several screen plates are provided on the screen beams; the upper support is installed at a higher position than the lower support, and the screen beams are inclined; a protective plate is installed in the channel between two adjacent screen beams, and the protective plate is installed at one end near the lower support.

[0007] In this design, the protective plate is installed between the screen beams and at the lower end. When the pellets, after being roasted at high temperature in the rotary kiln, fall onto the fixed screen, the pellets directly wash over the protective plate, preventing the castable material of the fixed screen from being washed away and falling off. This protects the steel structure of the fixed screen from being burned or even burned through, thus preventing equipment accidents and ensuring the stable operation of the rotary kiln.

[0008] Furthermore, a beam stop is provided at the lower end of the screen beam, and an installation rod is provided between the beam stops of two adjacent screen beams; one end of the protective plate is rolled into a semi-circular curved part, which is fastened to the installation rod, and the other end of the protective plate is laid inclined between the two screen beams along the slope of the castable material.

[0009] In this solution, the shape design and installation method of the protective plate result in low manufacturing and disassembly costs. If the protective plate is damaged by the erosion of the pellet ore during long-term operation, the damaged protective plate can be directly removed and replaced with a new one, which is simple to install and has low cost.

[0010] Furthermore, the bottom of the screen plate is provided with a slot, and the spacing between the inner walls of the slot is the same as the width of the screen beam; the screen plate is secured to the top of the screen beam through the slot.

[0011] Furthermore, the screen plates are arranged sequentially along the length of the screen beam; the first screen plate near the lower end of the screen beam abuts against the beam stop.

[0012] Furthermore, a receiving groove is provided on the top of the sieve plate.

[0013] In this design, the receiving tank can first hold a portion of the pellets when they enter the fixed screen, thus preventing a large-area impact when the subsequent pellets enter the screen and acting as a buffer.

[0014] Furthermore, the radius of the semi-circular curved portion is 42mm.

[0015] Furthermore, the two ends of the mounting rod are welded to the two adjacent beam stops; the diameter of the mounting rod is 40mm.

[0016] The beneficial effects of this utility model are: This invention provides a device for protecting the castable refractory material of a rotary kiln fixed screen. A protective plate is installed between the screen beams. When the high-temperature roasted pellets fall onto the fixed screen, the pellets directly wash against the protective plate, preventing them from directly impacting the screen and thus protecting the castable refractory material from being eroded and falling off. This prevents the steel structure of the fixed screen from being burned or even burned through, which could lead to equipment accidents. The end of the protective plate is rolled into a semi-circular bend, which is simply fastened to the mounting rod during installation, simplifying installation and reducing preparation and disassembly costs. This reduces equipment failure rates, minimizes labor replacement costs and downtime, and significantly improves production efficiency. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of a device for protecting the castable material of a rotary kiln fixed screen according to the present invention; Figure 2 This is a top view schematic diagram of a device for protecting the castable material of a rotary kiln fixed screen according to the present invention; Figure 3 This is a cross-sectional structural diagram of the protective plate and mounting rod of this utility model.

[0018] Figure label: 1. Upper support; 2. Lower support; 3. Screen beam; 31. Beam stop; 32. Mounting rod; 4. Screen plate; 41. Receiving trough; 5. Protective plate; 51. Bending section; 6. Rear wall of receiving hopper; 7. Rotary kiln; Detailed Implementation The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0019] like Figure 1 and Figure 2 As shown, this embodiment provides a device for protecting the castable refractory of a rotary kiln fixed screen, solving the problem that the castable refractory below the lower end of the fixed screen of the steel structure is easily exposed to high temperatures and burned due to long-term erosion. Specifically, it includes: Upper support 1, lower support 2, screen beam 3, screen plate 4, and protective plate 5; Several screen beams 3 are installed between the upper support 1 and the lower support 2, and the screen beams 3 are located below the discharge port of the rotary kiln 7. Several screen plates 4 are installed on the screen beams 3. The upper support 1 is installed higher than the lower support 2, and the screen beams 3 are inclined. A protective plate 5 is installed in the channel between two adjacent screen beams 3. The protective plate 5 is installed at the end near the lower support 2. When the pellets that have been roasted at high temperature in the rotary kiln 7 fall onto the fixed screen, the pellets directly wash over the protective plate 5, preventing the castable material of the fixed screen from being washed away and falling off by the pellets. This protects the steel structure of the fixed screen from being burned or even burned through, which could lead to equipment accidents and ensure the stable operation of the rotary kiln 7.

[0020] like Figure 3As shown, a beam stop 31 is provided at the lower end of the screen beam 3, and an installation rod 32 is provided between the beam stops 31 of two adjacent screen beams 3; one end of the protective plate 5 is rolled into a semi-circular curved part 51, which is fastened to the installation rod 32, and the other end of the protective plate 5 is laid inclined between the two screen beams 3 along the slope of the castable material; this shape design and installation method have low preparation and disassembly costs; if the protective plate 5 is damaged by the erosion of the pellet ore during long-term operation, the damaged protective plate 5 can be directly removed and replaced with a new one, which is simple to install and has low cost.

[0021] The bottom of the sieve plate 4 is provided with a slot, and the spacing between the inner walls of the slot is the same as the width of the sieve beam 3; the sieve plate 4 is secured to the top of the sieve beam 3 through the slot.

[0022] The screen plates 4 are arranged sequentially along the length of the screen beam 3; the first screen plate 4 near the lower end of the screen beam 3 abuts against the beam stop 31.

[0023] The top of the screen plate 4 is provided with a receiving groove 41; when the pellets enter the fixed screen, the receiving groove 41 can first hold a portion of the filling pellets in it, so that when the subsequent pellets enter the fixed screen, they will avoid direct impact with the screen plate 4 over a large area, thus playing a buffering role.

[0024] As a preferred embodiment, the two ends of the mounting rod 32 are welded to the two adjacent beam stops 31; the diameter of the mounting rod 32 is 40mm.

[0025] As a preferred embodiment, the radius of the semi-circular curved portion 51 of the protective plate 5 is 42mm.

[0026] The working principle of this embodiment is as follows: During the pellet production process, the pellets are roasted at high temperature in rotary kiln 7. As the rotary kiln 7 rotates and tilts, the pellets pass through the receiving hopper and fall onto the fixed screen via the back wall 6, and then through the gaps between the screen beams 3 onto the annular cooler trolley for cooling. After roasting, the pellets fall directly onto the protective plate 5 after landing on the fixed screen. The protective plate 5 protects the castable material of the fixed screen from being washed away by the pellets, preventing the steel structure from being exposed to high temperatures, protecting it from burn-through, reducing equipment failure rate, minimizing labor replacement costs and downtime, and greatly improving production efficiency.

[0027] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A device for protecting the castable material of a rotary kiln fixed screen, characterized in that: It includes an upper support (1) and a lower support (2); several screen beams (3) are erected between the upper support (1) and the lower support (2), and the screen beams (3) are located below the discharge port of the rotary kiln (7); several screen plates (4) are provided on the screen beams (3); the installation position of the upper support (1) is higher than the installation position of the lower support (2), and the screen beams (3) are inclined; a protective plate (5) is installed in the channel between two adjacent screen beams (3), and the protective plate (5) is installed at one end near the lower support (2).

2. The device for protecting the castable material of the fixed screen in a rotary kiln according to claim 1, characterized in that: A beam stop (31) is provided at the lower end of the screen beam (3), and an installation rod (32) is provided between the beam stops (31) of two adjacent screen beams (3); one end of the protective plate (5) is rolled into a semi-circular curved part (51), the curved part (51) is fastened to the installation rod (32), and the other end of the protective plate (5) is laid inclined between the two screen beams (3) along the slope of the castable material.

3. The device for protecting the castable material of the fixed screen in a rotary kiln according to claim 2, characterized in that: The bottom of the sieve plate (4) is provided with a slot, and the spacing between the inner walls of the slot is the same as the width of the sieve beam (3); the sieve plate (4) is secured to the top of the sieve beam (3) through the slot.

4. The device for protecting the castable material of the fixed screen in a rotary kiln according to claim 3, characterized in that: The screen plates (4) are arranged sequentially along the length of the screen beam (3); the first screen plate (4) near the lower end of the screen beam (3) abuts against the beam stop (31).

5. The device for protecting the castable material of the fixed screen in a rotary kiln according to claim 3, characterized in that: The top of the sieve plate (4) is provided with a receiving groove (41).

6. The device for protecting the castable material of the fixed screen in a rotary kiln according to any one of claims 2 to 5, characterized in that: The radius of the semi-circular curved part (51) is 42 mm.

7. The device for protecting the castable material of the fixed screen in a rotary kiln according to any one of claims 2 to 5, characterized in that: The two ends of the mounting rod (32) are welded to the two adjacent beam stops (31); the diameter of the mounting rod (32) is 40mm.

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