CN217026040U

CN217026040U - Microwave shaft furnace discharging device for treating iron-containing carbon-containing pellets

Info

Publication number: CN217026040U
Application number: CN202220703131.6U
Authority: CN
Inventors: 周云花; 李方; 但家云; 吴云; 邹凡球; 文小平; 喻松涛; 熊果
Original assignee: Hunan Valin Xiangtan Iron and Steel Co Ltd
Current assignee: Hunan Valin Xiangtan Iron and Steel Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-22
Anticipated expiration: 2032-03-29

Abstract

The utility model discloses a microwave shaft furnace discharging device for treating iron-containing and carbon-containing pellets, which comprises a discharging section, a buffer bin and a rack. The discharging device is arranged at the bottom of the microwave vertical furnace, a plurality of scrapers are equidistantly distributed on a chain row of the discharging device, and hard alloy is surfacing welded on the scrapers. The buffer cone has a cone angle of 50⁰~70⁰The regular rectangular pyramid hollow structure is uniformly provided with 4 supporting tubes at the periphery, and the angle between the supporting tubes and the conical surface is 150⁰~180⁰And (4) degree. The supporting tube, the buffering cone and the inner cavity of the buffering bin are welded into a firm whole. The utility model has the beneficial effects that:compact structure, easy manufacture, simple and convenient maintenance, stable and smooth discharging and improved production efficiency. The device is safe and stable after actual long-term operation on site, has obvious effect and is suitable for popularization and application.

Description

Microwave shaft furnace discharging device for treating iron-containing and carbon-containing pellets

Technical Field

The utility model belongs to the technical field of metallurgy, and relates to a microwave shaft furnace discharging device for treating iron-containing and carbon-containing pellets.

Background

The iron-containing and carbon-containing pellet is an iron-containing and carbon-containing pellet prepared by fully mixing iron-containing powder such as iron ore powder, laterite-nickel ore, vanadium-titanium magnetite, sulfuric acid slag, metallurgical dust, dedusting ash, steelmaking sludge and the like, adding solid reducing agents such as coal powder, coke powder and the like and a proper amount of binder and then carrying out pelletizing or ball-pressing. The iron-containing carbon-containing pellets are dried and then added into a furnace, and iron powder is reduced by carbon at the temperature of about 1150 ℃ in the furnace chamber to generate metallized pellets.

The discharging device of the reduction roasting microwave vertical furnace is usually a spiral discharging machine, and the reduced material is discharged out of the furnace. The spiral discharging machine can be sealed, but cannot be used for processing iron-containing pellets, because the iron-containing carbon-containing pellets become metallized pellets after roasting, the strength is increased, and particularly when the pellets are cooled at a low temperature, the strength of the pellets is further increased because the pellets are cooled nearly to be finished, the spiral shaft is often clamped, a motor is burnt out, and even the spiral shaft is broken, so that the smooth production is seriously influenced. In addition, the pellets are also frequently bridged at the bottom of the microwave vertical furnace, so that the discharging is not smooth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and the defects of the prior art and provide a stable and reliable discharging device of a microwave shaft furnace for processing iron-containing and carbon-containing pellets in long-term operation.

The technical scheme of the utility model is as follows:

the utility model provides a handle microwave shaft furnace discharging device of iron-containing carbonaceous pellet which characterized in that: the device comprises a discharge section, a buffer bin, a rack and a circulating motion unit, wherein the discharge section is a relatively closed space formed by a discharge section cavity, an ash collecting hopper, a turning plate discharging mechanism, a rotary discharging mechanism and a top cover; the circulating motion unit comprises a driven roller, a chain row and a driving roller; a top cover is arranged at the top of the cavity of the discharging section, the top cover of the cavity of the discharging section is designed into an interlayer, the interlayer space of the top cover is communicated with the water nozzle, a supporting plate is arranged below the chain row and in a position right opposite to the buffer cone, and the supporting plate is contacted with the bottom surface of the chain row; a plurality of scraping plates are equidistantly distributed on the chain row, and hard alloy is surfacing welded on the scraping plates; an adjusting plate is arranged on the discharging section.

The buffer bin comprises a buffer cone, a buffer bin inner cavity, a buffer bin water jacket and a supporting tube, wherein the supporting tube, the buffer cone and the buffer bin inner cavity are welded into a whole, and the buffer cone has a cone angle of 50-70 DEG⁰The regular rectangular pyramid hollow structure is uniformly provided with 4 supporting tubes at the periphery, and the angle between the supporting tubes and the conical surface is 150⁰~180⁰。

The surge bin water jacket is welded with a water nozzle.

The utility model has the advantages of compact structure, easy manufacture, simple and convenient maintenance, stable and smooth discharging and improved production efficiency. The device is safe and stable after actual long-term operation on site, has obvious effect and is suitable for popularization and application.

Drawings

FIG. 1 is a front view of the discharge apparatus of the present invention.

Fig. 2 is a front view of the buffer bin of the discharging device.

In the figure: 1. a discharging section; 2. a buffer bin; 3. a buffer cone; 4. an inner cavity of the buffer bin; 5. a surge bin water jacket; 6. supporting a tube; 7. a water nozzle; 8. a discharge section cavity; 9. a driven roller; 10. a dust collecting hopper; 11. a flap unloading mechanism; 12. a frame; 13. a chain row; 14. a squeegee; 15. a pallet; 16. an adjusting plate; 17. a rotary unloading mechanism; 18. a drive roll; 19. and a top cover.

Detailed Description

The utility model is further illustrated with reference to the accompanying drawings and the specific embodiments.

Referring to fig. 1 and 2: a microwave shaft furnace discharging device for processing pellets containing iron and carbon comprises a discharging section 1, a buffer bin 2, a frame 12 and a moving unit.

The discharging section 1 is composed of a discharging section cavity 8, an ash collecting hopper 10, a turning plate discharging mechanism 11, a rotary discharging mechanism 17 and a top cover 19 to form a relatively closed space, and external air is effectively prevented from entering the discharging section cavity 8, so that the high-temperature metallized pellets are prevented from being oxidized in the atmosphere. Go out the material section cavity 8 and form by the welding of heat-resistant steel sheet, the top is equipped with top cap 19, and top cap 19 is quick-release structure, need not use tools and can open fast, conveniently observes and overhauls. The top cover 19 is also provided with an interlayer, and the water nozzle 7 is welded and communicated with the interlayer. The cooling water enters and exits the interlayer through the water nozzle 7 and continuously flows in a circulating way, and the heat transferred to the top cover 19 is taken away, so that the pellets on the chain row 13 are further cooled to be below 100 ℃. A support plate 15 is arranged below the chain row 13 at a position opposite to the buffer cone 3, and the support plate 15 is contacted with the bottom surface of the chain row 13, so that the chain row 13 is always kept in a horizontal state in the section. A plurality of scrapers 14 are equidistantly distributed on the chain row 13, and hard alloy is deposited on the scrapers 14. The discharging section 1 is also provided with an adjusting plate 16, when the adjusting plate 16 ascends, the opening is enlarged, and the discharging amount is increased; on the contrary, when the adjusting plate descends, the opening is reduced, and the discharge amount is reduced.

The buffer bin 2 is composed of a buffer cone 3, a buffer bin inner cavity 4, a buffer bin water jacket 5 and a supporting tube 6. The buffer cone 3 has a cone angle of 60 degrees⁰The regular rectangular pyramid hollow structure is uniformly provided with 4 supporting tubes 6 at the periphery, and the angle between the supporting tubes 6 and the conical surface is 150⁰And (4) degree. The supporting tube 6, the buffering cone 3 and the buffering bin inner cavity 4 are welded into a firm whole. The buffer cone 3 is used for bearing the pressure of the pellets on the bottom layer of the microwave shaft furnace, preventing the pellets from directly pressing on the chain row and preventing the pellets from being bridged. The water nozzle 6 is welded on the water jacket 5 of the surge bin, cooling water enters and exits the water jacket through the water nozzle 7 and continuously flows in a circulating way, and heat transferred to the inner cavity 4 of the surge bin is taken away, so that the metallized pellets in the surge bin 2 are cooled to 200 DEG CThe following.

The discharging section 1 is fixed on the frame 12 by bolts. The upper flange and the lower flange of the buffer bin 2 are respectively connected with a discharge port flange of the microwave vertical furnace and a feed port flange of the discharge section 1 by bolts.

The discharge section cavity 8 is fixed on the frame 12, and the circular motion unit is fixed in the discharge section cavity 8. The cyclic motion unit comprises a driven roller 9, a chain row 13 and a drive roller 18. A number of flights 14 are equidistantly distributed in the chain row 13. The power mechanism is arranged outside the discharge section cavity 8 and is connected with the driving roller 18 through a coupler so as to drive the chain row 13 to do clockwise circulating motion.

The working process of the utility model is as follows: the power mechanism drives the driving roller 18 to rotate at a constant speed according to a preset speed, so as to drive the chain row 13 to do clockwise circulating motion. The well baked metallized pellets at the bottom of the microwave shaft furnace are continuously taken away by a plurality of equidistant scrapers 14 on the chain row 13, and the pellets at the upper part of the microwave shaft furnace continuously slide downwards under the action of gravity. Meanwhile, the rotary discharging mechanism 17 rotates clockwise to discharge the pellets continuously. The dust scattered from the chain row 13 falls on the bottom surface of the cavity 8 of the discharging section and is reversely brought to the dust collecting hopper 10 through the scraper 14, when the dust in the hopper reaches a certain amount, the turning plate discharging mechanism 11 is automatically opened to discharge the dust, and the turning plate discharging mechanism 11 is automatically reset after the dust is emptied.

Claims

1. The utility model provides a handle microwave shaft furnace discharging device of iron content carbonaceous pellet which characterized in that: the device comprises a discharging section, a buffer bin, a rack and a circulating motion unit, wherein the discharging section is a relatively closed space formed by a discharging section cavity, an ash collecting hopper, a turning plate discharging mechanism, a rotary discharging mechanism and a top cover; the circulating motion unit comprises a driven roller, a chain row and a driving roller; a top cover is arranged at the top of the cavity of the discharging section, the top cover of the cavity of the discharging section is designed into an interlayer, the interlayer space of the top cover is communicated with the water nozzle, a supporting plate is arranged below the chain row and in a position right opposite to the buffer cone, and the supporting plate is contacted with the bottom surface of the chain row; a plurality of scraping plates are equidistantly distributed on the chain row, and hard alloy is surfacing welded on the scraping plates; an adjusting plate is arranged on the discharging section.

2. The microwave shaft furnace discharging device for processing the iron-containing and carbon-containing pellets as claimed in claim 1, wherein: the buffer bin comprises a buffer cone, a buffer bin inner cavity, a buffer bin water jacket and a supporting tube, wherein the supporting tube, the buffer cone and the buffer bin inner cavity are welded into a whole, and the buffer cone has a cone angle of 50 degrees⁰~70⁰The regular rectangular pyramid hollow structure is uniformly provided with 4 supporting tubes at the periphery, and the angle between the supporting tubes and the conical surface is 150⁰~180⁰And (4) degree.

3. The discharge device of the microwave shaft furnace for processing the pellets containing iron and carbon according to the claim 2, is characterized in that: a water nozzle is welded on the water jacket of the buffer bin.