Discharging system of fixed screen of rotary kiln

Abstract

The utility model relates to a discharging system of a rotary kiln fixed screen, which comprises a fixed screen, a first chute, a three-way pipe, a second chute, a bypass chute, a crusher and a belt conveyor, the first chute is arranged below the fixed screen, and the discharging end of the first chute is connected with the feeding end of the three-way pipe; one discharge end of the three-way pipe is connected with the second chute, the other discharge end of the three-way pipe is connected with the bypass chute, and gates are arranged at the two discharge ends of the three-way pipe; the crusher is arranged below the second chute, and the outlet end of the second chute corresponds to a feed port of the crusher; and the belt conveyor is arranged below the crusher and is used for conveying crushed materials. According to the discharging system, the problem that materials are wasted in an existing discharging mode can be solved, and the problems that the mode that discharged materials are pulled away and then crushed is long in operation period and high in cost can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln fixed screens, in particular to a material discharging system of a rotary kiln fixed screen. Background Art

[0002] The fixed screen is an important part of the rotary kiln in the grate-rotary kiln-ring cooler oxidation pelletizing process. The fixed screen is installed in the kiln head cover of the rotary kiln. The pellets in the rotary kiln contain large pellets and detached rings. When they pass through the fixed screen, the pellets with qualified particle size will fall from the screen gap and enter the ring cooler, while the large pieces and rings will remain on the screen and be sent to the designated location through the discharge chute. Then, the large pieces and rings will be transported to the designated plant area by car for crushing.

[0003] The existing discharge method is simple and crude, which directly sends large pieces of material to a designated location through a chute, where they are pulled away and then processed in a centralized manner. The large pieces of material contain useful pellets, which is wasteful if they are directly discharged and pulled out. The large pieces of material that have been pulled away need to be processed and crushed again before they can be used. The process is complicated and the operation cycle is long, which is not conducive to cost saving. Summary of the invention

[0004] The above technical problems have not been solved. The utility model provides a discharging system of a rotary kiln fixed screen, which can solve the problem of waste of materials in the existing discharging method, and the problem of long operation cycle and high cost of the method of pulling away the discharged materials and then crushing them.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A discharging system for a rotary kiln fixed screen comprises a fixed screen, which is installed in a kiln head cover of a rotary kiln, and also comprises a first chute, a tee, a second chute, a bypass chute, a crusher and a belt conveyor; the first chute is arranged below the fixed screen, and a discharging end of the first chute is connected to a feeding end of the tee; one discharging end of the tee is connected to the second chute, and the other discharging end is connected to the bypass chute, and gates are arranged at both discharging ends of the tee; the crusher is arranged below the second chute, and the outlet end of the second chute corresponds to the feeding port of the crusher; the belt conveyor is arranged below the crusher to transport crushed materials.

[0007] The first chute, the second chute and the bypass chute are all stepped chutes.

[0008] A stop bar is fixedly provided at the outer edge of the top surface of each step of the step chute.

[0009] The height of the stop bar is 80 to 150 mm

[0010] The crusher is a jaw crusher.

[0011] Discs are arranged on the roller shaft of the fixed screen at equal intervals, and the discs arranged on two adjacent roller shafts are arranged in an interlaced manner.

[0012] A finished product trough is arranged below the end of the belt conveyor.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1) The utility model arranges the first chute, the second chute and the crusher below the fixed screen, so that the large pellets and rings on the screen enter the crusher through the first chute and the second chute to be crushed into qualified particle sizes for use, and the crushing is carried out while discharging the materials, which shortens the operation cycle, reduces the intermediate transportation links, and saves costs.

[0015] 2) Discs are arranged at equal intervals on the roller shaft of the fixed screen of the utility model. When large pieces of pellets are screened, the rotating discs can crush the large pieces of pellets, increase the proportion of pellets with qualified particle size, and thus improve the utilization rate of materials and reduce material waste; when blockage and sticking occur, the rotating discs can play a role in clearing the blockage.

[0016] 3) In the utility model, a bypass chute is provided as a spare channel. If the crusher is in the maintenance period, the large pellets and rings on the screen are transported to the designated location through the bypass chute without affecting the operation of the entire system.

[0017] 4) A retaining bar is fixedly provided at the outer edge of each step top surface of the stepped chute of the utility model. The material falling on the step top surface forms a "buffer pad". The retaining bar increases the thickness of the "buffer pad", reduces the impact force of the material hitting the inside of the chute, and also reduces the noise during the chute transportation process, thereby extending the service life of the chute. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 The utility model is a schematic diagram of a discharging system of a rotary kiln fixed screen.

[0020] Figure 2 It is a K-direction schematic diagram of the utility model.

[0021] Figure 3 It is a schematic diagram of a fixed screen disc of the utility model.

[0022] Figure 4 It is a schematic diagram of the fixed screen bar of the utility model.

[0023] Description of reference numerals:

[0024] In the figure: 1. Rotary kiln 2. Fixed screen 3. First chute 4. Tee pipe 5. Second chute 6. Bypass chute 7. Crusher 8. Belt conveyor 9. Bar 10. Finished product trough 401. Gate 201. Roller 202. Disc 203. Fixed screen outlet DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0027] like Figures 1 to 4 As shown, the utility model provides a discharging system of a fixed screen of a rotary kiln, comprising a fixed screen 2, which is installed in the kiln head cover of a rotary kiln 1, and further comprising a first chute 3, a tee pipe 4, a second chute 5, a bypass chute 6, a crusher 7 and a belt conveyor 8. The first chute 3 is arranged below the fixed screen 2, the discharging end of the first chute 3 is connected to the feeding end of the tee pipe 4, one discharging end of the tee pipe 4 is connected to the second chute 5, and the other discharging end is connected to the bypass chute 6, and gates 401 are arranged at both discharging ends of the tee pipe 4. The crusher 7 is arranged below the second chute 5, and the outlet end of the second chute 5 corresponds to the inlet of the crusher 7, and the belt conveyor 8 is arranged below the crusher 7 to transport the crushed materials.

[0028] The first chute 3, the second chute 5 and the bypass chute 6 are all step chutes. A stop bar 9 is fixedly provided at the outer edge of each step top surface of the step chute. The height of the stop bar 9 is 100 mm. The material falling on the top surface of the step forms a "buffer pad", and the stop bar increases the thickness of the "buffer pad", reduces the impact force of the material hitting the inside of the chute, and also reduces the noise during the chute transportation process, thereby extending the service life of the chute.

[0029] Discs 202 are arranged at equal intervals on the roller shaft 201 of the fixed screen, and the discs 202 arranged on two adjacent roller shafts 201 are arranged in an interlaced manner. When large pellets are screened, the rotating discs 202 can grind the large pellets, increase the proportion of pellets with qualified particle size, and thus improve the utilization rate of the material.

[0030] The crusher 7 is a jaw crusher. The material crushed by the crusher 7 falls on the belt conveyor 8 for transportation. A finished product trough 10 is provided below the end of the belt conveyor 8 so that the material transported by the belt conveyor 8 directly falls into the finished product trough 10 for collection.

[0031] The working process of the discharging system of a rotary kiln fixed screen in the utility model:

[0032] When the discharging system works normally, the gate 401 on the discharging end of the three-way pipe 4 connected to the second chute 5 is opened, while the gate 401 on the discharging end connected to the bypass chute 6 is closed.

[0033] When the pellets pass through the fixed screen 2, the disc 202 of the fixed screen can grind the large pieces of material, so that the ones that meet the particle size requirements fall into the ring cooler through the screen gap; the ones that still do not meet the particle size requirements will accumulate at the fixed screen outlet 203, and the materials that do not meet the particle size requirements are manually sent to the first chute 3. Then the materials pass through the second chute 5 and enter the crusher 7 for crushing. The crushed materials are transported to the finished product trough 10 for collection through the belt conveyor 8 for use.

[0034] If the crusher 7 is in maintenance period, the gate 401 on the discharge end of the tee pipe 4 connected to the second chute 5 is closed, and the gate 401 on the discharge end connected to the bypass chute 6 is opened. The materials are sent to the designated location through the first chute 3 and the bypass chute 6 in sequence for subsequent centralized processing.

[0035] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. In addition, the various different embodiments of the present invention can also be arbitrarily combined, as long as they do not violate the idea of ​​the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A rotary kiln fixed screen discharging system, comprising a fixed screen, the fixed screen being installed in a rotary kiln head cover, characterized in that: It also includes a first chute, a tee, a second chute, a bypass chute, a crusher and a belt conveyor; the first chute is arranged below the fixed screen, the discharge end of the first chute is connected to the feed end of the tee; one discharge end of the tee is connected to the second chute, and the other discharge end is connected to the bypass chute, and gates are provided at both discharge ends of the tee; the crusher is arranged below the second chute, and the outlet end of the second chute corresponds to the feed port of the crusher; the belt conveyor is arranged below the crusher to transport the crushed materials.

2. A discharge system for a rotary kiln fixed screen according to claim 1, characterized in that: The first chute, the second chute and the bypass chute are all stepped chutes.

3. A discharge system for a rotary kiln fixed screen according to claim 2, characterized in that: A stop bar is fixedly provided at the outer edge of the top surface of each step of the step chute.

4. A discharge system for a rotary kiln fixed screen according to claim 3, characterized in that: The height of the stop bar is 80-150 mm.

5. The discharge system of a rotary kiln fixed screen according to claim 1, characterized in that: The crusher is a jaw crusher.

6. A discharge system for a rotary kiln fixed screen according to claim 1, characterized in that: Discs are arranged on the roller shaft of the fixed screen at equal intervals, and the discs arranged on two adjacent roller shafts are arranged in an interlaced manner.

7. The discharging system of a rotary kiln fixed screen according to claim 1, characterized in that: A finished product trough is arranged below the end of the belt conveyor.

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