阅读说明：本技术 底部对流传导焖渣法及焖渣设备 (Bottom convection conduction slag stewing method and slag stewing equipment ) 是由 魏述松 于 2021-06-15 设计创作，主要内容包括：本发明公开了底部对流传导焖渣法及焖渣设备,焖渣法为将钢渣直接倾倒在焖渣池内,在一定时间内即时打水,使池内钢渣全部浸泡,浸泡一定时间后加速放水,继续焖渣。本发明中,焖渣槽中设置有进水管,进水管的内壁上设有多个通孔,在注水时水流更易于从通孔中流出,进而使钢渣堆的内部充分与水以及热蒸汽接触进行水化和粒化,并在水化时与未化合的氧化钙反应来消解游离氧化钙,粒化时能使基础铁与渣多数分离；同时本设备相较于常规的设备可以使槽内水及热蒸汽持续保持一定的高温,从而加速氧化镁在高温条件下的水化反应,降低氧化镁的不安定性；并且能将一切冷却渣、脱硫渣与热渣一起热焖,焖渣周期短,钢渣粉化率高。(The invention discloses a bottom convection conduction slag stewing method and slag stewing equipment. According to the invention, the water inlet pipe is arranged in the slag stewing groove, the inner wall of the water inlet pipe is provided with a plurality of through holes, water flow can easily flow out of the through holes during water injection, so that the interior of a steel slag pile is fully contacted with water and hot steam for hydration and granulation, the steel slag pile reacts with uncombined calcium oxide during hydration to digest free calcium oxide, and most of basic iron and slag can be separated during granulation; compared with the conventional equipment, the equipment can continuously keep water and hot steam in the tank at a certain high temperature, so that the hydration reaction of the magnesium oxide under the high-temperature condition is accelerated, and the instability of the magnesium oxide is reduced; and all the cooling slag, the desulphurization slag and the hot slag can be thermally braised together, the slag stewing period is short, and the pulverization rate of the steel slag is high.)

1. The bottom convection conduction slag stewing method is characterized by comprising the following steps:

s1: conveying steel slag generated in steel making to a slag stewing pool, reserving a water pipe in the slag stewing pool, and pouring the steel slag into the slag stewing pool;

s2: injecting water from the water pipe to make water flow out from the bottom and the side of the water pipe, and making the water submerge the highest part of the steel slag pile to make the steel slag fully contact with the water and the generated hot steam, so that the steel slag is hydrated and granulated to digest calcium oxide and magnesium oxide;

s3: after the steel slag pile is soaked for 1-2 hours, a drain valve in a slag stewing pool is opened to drain water;

s4: after 4-5 hours of slag stewing, discharging pulverized steel slag in the slag stewing pool through a lifting mechanism, and scraping residual steel slag at the bottom of the slag stewing pool through a scraping mechanism.

2. The slag stewing equipment based on the bottom convection conduction slag stewing method as claimed in claim 1, which comprises a slag stewing groove (1) and a sealing cover (2), wherein a fixing rod (22) is arranged inside the slag stewing groove (1), at least one limiting sleeve (23) is arranged on the fixing rod (22), a water inlet pipe (24) is sleeved inside the limiting sleeve (23), the inner diameter of the upper end of the water inlet pipe (24) is larger than that of the lower end of the water inlet pipe, a plurality of through holes (25) which are annularly distributed along the axial direction of the water inlet pipe (24) and around the axial direction are formed in the inner wall of the water inlet pipe (24), a cavity (5) is arranged on one side of the slag stewing groove (1), a valve (4) is arranged between the cavity and the cavity (5), a material conveying pipe (6) which is arranged along the vertical direction is arranged inside the cavity (5), and a material discharging pipe (7) which is larger than the inner diameter of the material conveying pipe (6) is fixedly connected to the upper end of the material conveying pipe (6), arrange the top of material pipe (7) and be equipped with first driving piece (8), and the output of first driving piece (8) is equipped with rotation axis (9) that extend to conveying pipeline (6) bottom, be equipped with auger (10) and scroll-like row flitch (11) on rotation axis (9), row flitch (11) are located the inside of arranging material pipe (7), the inside of braising sediment groove (1) is equipped with scraper blade (16) of terminal surface under the laminating and is used for driving the drive division that scraper blade (16) removed, the bottom of braising sediment groove (1) is equipped with the drainage mechanism who is used for the drainage.

3. The slag stewing device adopting the bottom convection conduction slag stewing method as claimed in claim 2, wherein the outer diameter of the lower end of the water inlet pipe (24) is not larger than the inner diameter of the limiting sleeve (23), the outer diameter of the upper end of the water inlet pipe (24) is larger than the inner diameter of the limiting sleeve (23), and the axial direction of the through hole (25) and the radial direction of the end surface of the water inlet pipe (24) form an included angle of 30-60 degrees.

4. The slag stewing equipment adopting the bottom convection conduction slag stewing method as claimed in claim 2, wherein an obliquely arranged pipeline is communicated between the valve (4) and the conveying pipe (6), the bottom of the slag stewing groove (1) is an inclined surface with an inclination angle of 5-15 degrees, a groove (3) is arranged on the lower side of the bottom of the slag stewing groove (1), the cross section of the groove (3) is in an isosceles trapezoid shape, and the valve (4) is positioned at the lowest position of the groove (3).

5. The slag stewing apparatus for carrying out the slag stewing by using the bottom convection conduction method as claimed in claim 2, wherein the discharge plate (11) is attached to the inner lower end surface of the discharge pipe (7), and the side surface of the discharge pipe (7) is provided with a discharge opening (12).

6. The slag stewing equipment adopting the bottom convection conduction slag stewing method as claimed in claim 2, wherein the driving part is provided with two driving parts and is respectively positioned at two axial sides of the scraping plate (16), the driving part comprises a guide groove (13), a guide assembly positioned in the guide groove (13), a second driving part (17) and a transmission assembly, the guide assembly is composed of a guide rail positioned at the bottom of the guide groove (13) and a guide wheel (14), the guide wheel (14) is connected with the scraping plate (16) through a connecting rod (15), a supporting wheel (21) is arranged at the inner corner of the guide groove (13), the transmission assembly is composed of two first gears (19) and two winding rollers (18), the winding rollers (18) are fixed on the end surface of the first gears (19), a connecting rope (20) is wound on the outer side of the winding rollers (18), and the two connecting ropes (20) on the two winding rollers (18) are respectively and fixedly connected with the supporting wheel (21) in a bypassing mode Are connected at both sides of the connecting rod (15).

7. The slag stewing equipment adopting the bottom convection conduction slag stewing method as claimed in claim 2, wherein the upper end of the water inlet pipe (24) is in a horn shape, a pressure release valve (26) is embedded in the sealing cover (2), a three-way valve is arranged on the pressure release valve (26), one end of the three-way valve is used for water injection of the water inlet pipe (24), the other end of the three-way valve is connected with a pipe body inserted into the water inlet pipe (24), and a sealing sleeve (27) is sleeved on the outer side of the pipe body.

8. The slag stewing equipment adopting the bottom convection conduction slag stewing method as claimed in claim 2, wherein the drainage mechanism comprises a drainage pipe (28), a plate body and a shell (29) are arranged at the upper end of the drainage pipe (28), a plurality of rotatable movable plates (30) are arranged on the plate body, a driving motor and a gear assembly for driving the movable plates (30) to rotate are arranged inside the shell (29), the gear assembly consists of a second gear (31) and a third gear (32), and both the second gear and the third gear are bevel gears.

Technical Field

The invention relates to the technical field of slag stewing treatment, in particular to a bottom convection conduction slag stewing method and slag stewing equipment.

Background

The slag stewing treatment is also called steel slag pit stuffiness or steel slag hot stuffiness treatment, and particularly refers to a process of pouring high-temperature steel plate slag into a slag pit, spraying water, covering a slag stewing cover, and automatically cracking and pulverizing the steel slag in a closed slag pit by generating a large amount of saturated steam when the hot slag meets water. After the steel slag contacts water, impurities such as quicklime, magnesium oxide and the like in the steel slag can quickly react with the water in a high-temperature environment, so that the impurities in the steel slag can be removed through slag stewing treatment, and the purity of steel is improved.

In the conventional slag stewing treatment, water is usually sprayed on the steel slag from top to bottom, and the water cannot be fully contacted with the steel slag due to the dense stacking of the steel slag, so that the treatment is incomplete; meanwhile, the pulverized substances after the slag stewing treatment need to be dug out by using a digging machine, so that the mode has safety risk and low efficiency.

Disclosure of Invention

The invention aims to solve the problems and provides a bottom convection conduction slag stewing method and slag stewing equipment.

In order to achieve the purpose, the invention adopts the following technical scheme:

the bottom convection conduction slag stewing method comprises the following steps:

s1: conveying steel slag generated in steel making to a slag stewing pool, reserving a water pipe in the slag stewing pool, and pouring the steel slag into the slag stewing pool;

s2: injecting water from the water pipe to make water flow out from the bottom and the side of the water pipe, and making the water submerge the highest part of the steel slag pile to make the steel slag fully contact with the water and the generated hot steam, so that the steel slag is hydrated and granulated to digest calcium oxide and magnesium oxide;

s3: after the steel slag pile is soaked for 1-2 hours, a drain valve in a slag stewing pool is opened to drain water;

s4: after 4-5 hours of slag stewing, discharging pulverized steel slag in the slag stewing pool through a lifting mechanism, and scraping residual steel slag at the bottom of the slag stewing pool through a scraping mechanism.

The slag stewing equipment adopting the bottom convection conduction slag stewing method comprises a slag stewing groove and a sealing cover, wherein a fixed rod is arranged in the slag stewing groove, at least one limit sleeve is arranged on the fixed rod, a water inlet pipe is sleeved in the limit sleeve, the inner diameter of the upper end of the water inlet pipe is larger than that of the lower end of the water inlet pipe, a plurality of through holes which are distributed along the axial direction of the water inlet pipe and around the axial direction are formed in the inner wall of the water inlet pipe, a cavity is arranged on one side of the slag stewing groove, a valve is arranged between the cavity and the cavity, a conveying pipe which is arranged along the vertical direction is arranged in the cavity, the inner diameter of the upper end of the conveying pipe is fixedly connected with a material discharging pipe which is larger than the inner diameter of the conveying pipe, a first driving piece is arranged at the top of the material discharging pipe, the output end of the first driving piece is provided with a rotating shaft which extends to the bottom of the conveying pipe, a spiral conveyer and a spiral material discharging plate are arranged on the rotating shaft, and the material discharging plate is positioned in the conveying pipe, the slag stewing groove is internally provided with a scraper attached to the lower end face and a driving part for driving the scraper to move, and the bottom of the slag stewing groove is provided with a drainage mechanism for draining water

As a further description of the above technical solution:

the outer diameter of the lower end of the water inlet pipe is not larger than the inner diameter of the limiting sleeve, the outer diameter of the upper end of the water inlet pipe is larger than the inner diameter of the limiting sleeve, and an included angle of 30-60 degrees is formed between the axial direction of the through hole and the radial direction of the end face of the water inlet pipe.

As a further description of the above technical solution:

the pipeline is obliquely arranged and communicated between the valve and the conveying pipeline, the bottom of the slag stewing groove is an inclined plane with an inclination angle of 5-15 degrees, a groove is formed in the lower side of the bottom of the slag stewing groove, the cross section of the groove is in an isosceles trapezoid shape, and the valve is located at the lowest position of the groove.

As a further description of the above technical solution:

the material discharging plate is attached to the lower end face of the interior of the material discharging pipe, and the side face of the material discharging pipe is provided with a material discharging opening.

As a further description of the above technical solution:

the drive division is equipped with two to be located the axial both sides of scraper blade respectively, the drive division includes the guide way, is located guide assembly, second driving piece and the drive assembly of guide way, the guide assembly comprises guide rail and the leading wheel that is located the guide way bottom, the leading wheel passes through the connecting rod and is connected with the scraper blade, the inside corner of guide way is equipped with the supporting wheel, the drive assembly comprises two first gears and two wire winding rollers, the terminal surface at first gear is fixed to the wire winding roller to the outside winding of wire winding roller has the connection rope, two on two wire winding rollers connect the rope and walk around the both sides of supporting wheel fixed connection at the connecting rod respectively.

As a further description of the above technical solution:

the upper end of inlet tube is loudspeaker form, the inside of closing cap inlays and is equipped with the relief valve, be equipped with the three-way valve on the relief valve, the one end of three-way valve is used for the inlet tube water injection, and the other end is connected with the inside body of inserting the inlet tube, the outside cover of body is equipped with the seal cover.

As a further description of the above technical solution:

the drainage mechanism comprises a drainage pipe, a plate body and a shell are arranged at the upper end of the drainage pipe, a plurality of rotatable movable plates are arranged on the plate body, a driving motor and a gear assembly used for driving the movable plates to rotate are arranged inside the shell, the gear assembly is composed of a second gear and a third gear, and the two gears are bevel gears.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. in the invention, the slag stewing groove is internally provided with a water inlet pipe, the inside of the water inlet pipe is of a structure with a large upper part and a small lower part, and the inner wall of the water inlet pipe is provided with a plurality of through holes, so that water flows out of the through holes more easily during water injection, the inside of a steel slag pile is fully contacted with water and hot steam for hydration and granulation, and reacts with uncombined calcium oxide to generate Ca (OH) 2 to digest free calcium oxide (f-CaO) during hydration, and most of basic iron and slag can be separated during granulation; compared with the conventional equipment, the equipment can continuously keep water and hot steam in the tank at a certain high temperature, so that the hydration reaction of the magnesium oxide under the high-temperature condition is accelerated, and the instability of the magnesium oxide is reduced; and all the cooling slag, the desulphurization slag and the hot slag can be thermally braised together, the slag stewing period is short, the pulverization rate of the steel slag can reach 100 percent, the 0-20mm grade reaches about 60 percent, and the 0-15mm grade of the steel slag which is cleaned out from the groove can reach 90 percent after being aged for 16 hours.

2. According to the slag-removing device, the cavity is arranged on one side of the slag-stewing groove, the conveying pipe is arranged in the cavity, the discharging pipe is arranged on the conveying pipe, the packing auger and the discharging plate are arranged in the conveying pipe and the discharging pipe, compared with the conventional digging machine, the slag-removing device has the function of lifting the slag through the packing auger, and meanwhile, the slag in the discharging pipe is pushed out through the spiral discharging plate, so that the slag-removing safety is improved, and the slag-removing efficiency is also improved.

3. According to the slag stewing device, the guide groove and the scraper are arranged in the slag stewing groove, the driving assembly for driving the scraper to move is arranged in the guide groove, the driving assembly is provided with the second driving piece, the winding roller, the first gear and the connecting rope, and the scraper can flexibly move back and forth by dragging the connecting rope to push away residual steel slag at the bottom of the slag stewing groove.

Drawings

FIG. 1 is a schematic view of the whole structure inside the slag stewing groove in the invention;

FIG. 2 is a schematic view of the internal structure of the groove of the present invention;

FIG. 3 is a schematic view of the internal structure of the chamber of the present invention;

FIG. 4 is a schematic view of the internal structure of the guide groove of the present invention;

FIG. 5 is a schematic view of the structure of the transmission assembly of the present invention;

FIG. 6 is a schematic view of the inner structure of the water inlet pipe according to the present invention;

FIG. 7 is a schematic view of a connection structure of a water inlet pipe and a pressure release valve according to the present invention;

FIG. 8 is a schematic view showing the overall structure of a drain pipe according to the present invention;

FIG. 9 is a schematic top view of the drain pipe of the present invention;

fig. 10 is a schematic view of the internal structure of the housing of the present invention.

Illustration of the drawings:

1. a slag stewing groove; 2. sealing the cover; 3. a groove; 4. a valve; 5. a cavity; 6. a delivery pipe; 7. a discharge pipe; 8. a first driving member; 9. a rotating shaft; 10. a packing auger; 11. a discharge plate; 12. a discharge outlet; 13. a guide groove; 14. a guide wheel; 15. a connecting rod; 16. a squeegee; 17. a second driving member; 18. a winding roller; 19. a first gear; 20. connecting ropes; 21. a support wheel; 22. fixing the rod; 23. a limiting sleeve; 24. a water inlet pipe; 25. a through hole; 26. a pressure relief valve; 27. sealing sleeves; 28. a drain pipe; 29. a housing; 30. a movable plate; 31. a second gear; 32. a third gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

referring to fig. 1-10, the bottom convection slag stewing method includes the following steps:

s1: conveying steel slag generated in steel making to a slag stewing pool, reserving a water pipe in the slag stewing pool, and pouring the steel slag into the slag stewing pool;

s2: injecting water from the water pipe to make water flow out from the bottom and the side of the water pipe, and making the water submerge the highest part of the steel slag pile to make the steel slag fully contact with the water and the generated hot steam, so that the steel slag is hydrated and granulated to digest calcium oxide and magnesium oxide;

s3: after the steel slag pile is soaked for 1-2 hours, a drain valve in a slag stewing pool is opened to drain water;

s4: after 4-5 hours of slag stewing, discharging pulverized steel slag in the slag stewing pool through a lifting mechanism, and scraping residual steel slag at the bottom of the slag stewing pool through a scraping mechanism.

Compared with the conventional method of spraying water at the upper part, the steps enable water to flow out of the steel slag, enable the steel slag to be fully contacted with the water, and simultaneously generate hot steam from bottom to top, so that the high temperature can be kept for a long time, the water injection time is shortened, and the uniformity and the efficiency of the slag stewing treatment are improved.

The slag stewing equipment of the bottom convection conduction slag stewing method comprises a slag stewing groove 1 and a sealing cover 2, wherein a fixed rod 22 is arranged in the slag stewing groove 1, at least one limit sleeve 23 is arranged on the fixed rod 22, a water inlet pipe 24 is sleeved in the limit sleeve 23, the inner diameter of the upper end of the water inlet pipe 24 is larger than that of the lower end, a plurality of through holes 25 which are annularly distributed along the axial direction of the water inlet pipe 24 and around the axial direction are formed in the inner wall of the water inlet pipe 24, a cavity 5 is arranged on one side of the slag stewing groove 1, a valve 4 is arranged between the cavity 5 and the cavity 5, a conveying pipe 6 which is arranged along the vertical direction is arranged in the cavity 5, a discharging pipe 7 with the inner diameter larger than that of the conveying pipe 6 is fixedly connected to the upper end of the conveying pipe 6, a discharging plate 11 is attached to the lower end face of the inner part of the discharging pipe 7, a discharging port 12 is arranged on the side face of the discharging pipe 7, a first driving part 8 is arranged at the top of the discharging pipe 7, and a rotating shaft 9 which extends to the bottom of the conveying pipe 6 is arranged at the output end of the first driving part 8, the rotary shaft 9 is provided with a packing auger 10 and a spiral discharge plate 11, the discharge plate 11 is positioned inside the discharge pipe 7, the inside of the slag stewing groove 1 is provided with a scraping plate 16 attached to the lower end face and a driving part for driving the scraping plate 16 to move, and the bottom of the slag stewing groove 1 is provided with a drainage mechanism for draining water. The first driving piece 8 is used for driving the packing auger 10 and the discharge plate 11 to synchronously rotate, and the pulverized steel slag is lifted and discharged.

The outer diameter of the lower end of the water inlet pipe 24 is not larger than the inner diameter of the limiting sleeve 23, the outer diameter of the upper end of the water inlet pipe 24 is larger than the inner diameter of the limiting sleeve 23, and an included angle of 30-60 degrees is formed between the axial direction of the through hole 25 and the radial direction of the end face of the water inlet pipe 24. When water is injected, the through holes 25 which are obliquely arranged are easier to enable water to enter, and meanwhile, the through holes 25 can play a role in exhausting and relieving pressure when the slag is stewed.

The pipeline which is obliquely arranged is communicated between the valve 4 and the material conveying pipe 6, the bottom of the slag stewing groove 1 is an inclined plane with an inclination angle of 5-15 degrees, a groove 3 is arranged at the lower side of the bottom of the slag stewing groove 1, the cross section of the groove 3 is in an isosceles trapezoid shape, and the valve 4 is positioned at the lowest position of the groove 3. The steel slag after pulverization is convenient to fall into the bottommost part of the conveying pipe 6 through the inclined arrangement, and discharging is convenient.

The drive division is equipped with two, and be located the axial both sides of scraper blade 16 respectively, the drive division includes guide way 13, be located the guide assembly in guide way 13, second driving piece 17 and transmission assembly, the guide assembly comprises guide rail and leading wheel 14 that are located the guide way 13 bottom, leading wheel 14 passes through connecting rod 15 and is connected with scraper blade 16, the inside corner of guide way 13 is equipped with supporting wheel 21, transmission assembly comprises two first gears 19 and two wire winding rollers 18, wire winding roller 18 fixes the terminal surface at first gear 19, and the outside winding of wire winding roller 18 has connection rope 20, two connection ropes 20 on two wire winding rollers 18 are walked around supporting wheel 21 fixed connection respectively in the both sides of connecting rod 15.

The upper end of inlet tube 24 is loudspeaker form, and the inside of closing cap 2 is inlayed and is equipped with relief valve 26, is equipped with the three-way valve on the relief valve 26, and the one end of three-way valve is used for the 24 water injections of inlet tube, and the other end is connected with and inserts the inside body of inlet tube 24, and the outside cover of body is equipped with seal cover 27. The horn-shaped structure facilitates the entry of the pipe body, when the slag stewing treatment is carried out, the water inlet pipe 24 is placed on the limiting sleeve 23 firstly, after the sealing cover 2 is covered, the pipe body on the three-way valve enters the water inlet pipe 24, the sealing cover 27 expands to abut against the water inlet pipe 24 along with the rise of the internal temperature of the slag stewing groove 1, the sealing effect is achieved, the sealing cover 2 is lifted when slag is discharged, the water inlet pipe 24 can be taken out together, and the water inlet pipe 24 is taken down again to be cleaned after the temperature is reduced.

The drainage mechanism comprises a drainage pipe 28, a plate body and a shell 29 are arranged at the upper end of the drainage pipe 28, a plurality of rotatable movable plates 30 are arranged on the plate body, a driving motor and a gear assembly used for driving the movable plates 30 to rotate are arranged inside the shell 29, the gear assembly is composed of a second gear 31 and a third gear 32, and the two gears are bevel gears. The driving motor is a servo motor with a waterproof function, and the movable plate 30 is controlled by the controller to rotate conveniently, so that water is drained conveniently.

The working principle is as follows: when the device is used, firstly, steel slag is poured into the slag stewing groove 1, the uppermost layer of a steel slag pile is always lower than the lowest end of the guide groove 13, then the sealing cover 2 is lifted, a pipeline at the bottom of the pressure release valve 26 is aligned with the water inlet pipe 24, the sealing cover 2 is put down, then water is injected from the water inlet pipe 24, water flows out of the through hole 25 and the bottom of the water inlet pipe 24 along the water inlet pipe 24 until the water surface in the slag stewing groove 1 does not pass through the steel slag pile, after the steel slag is soaked for one to two hours, the second gear 31 is driven to rotate through the driving motor, the third gears 32 rotate, the movable plate 30 further rotates, the soaked water is discharged out of the slag stewing groove 1, after the water is discharged, the movable plate 30 is closed, the slag stewing is continued through steam in the slag stewing groove 1, the valve 4 is opened after four to five hours, the first driving piece 8 is started to discharge the material, and pulverized steel slag particles enter the material conveying pipe 6 after the valve 4 is opened, the rotatory auger 10 drives the slag and moves up, after the slag gets into row material pipe 7, rotatory row material board 11 promotes slag to bin outlet 12 department to push out the slag, when stewing the remaining slag in the bottom in slag groove 1, start second driving piece 17, second driving piece 17 drives winding roll 18 rotatory, through the pulling of connecting rope 20, drive scraper blade 16 and remove along the bottom in stewing slag groove 1, push remaining slag in recess 3, accomplish the operation of stewing the slag through foretell step.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.