阅读说明：本技术 一种高效铁水脱硫装置 (High-efficient molten iron desulphurization unit ) 是由 范冰 于 2019-11-18 设计创作，主要内容包括：本发明提出一种高效铁水脱硫装置,包括可升降的搅拌喷射单元和脱硫剂吹送单元；脱硫剂吹送单元包括脱硫剂储罐、脱硫剂吹送管和脱硫剂喷嘴；脱硫剂喷嘴朝向转炉出炉倾倒至铁水罐的铁水流吹送脱硫剂；搅拌喷射单元包括竖直的搅拌轴和位于搅拌轴下端的搅拌叶片；搅拌叶片可在铁水罐底部铁水中与铁水罐上方空间之间升降；搅拌轴的中部开设有沿轴向延伸的进气孔；搅拌叶片沿径向开设有喷气孔；喷气孔与进气孔连通；进气孔的进气端并联连接有第一进气管和第二进气管；第一进气管连通脱硫剂吹送管；第二进气管连通惰性气体管道。本发明将脱硫剂与铁水充分混合,提高脱硫剂的使用效率,脱硫效率高；同时能有效防止脱硫渣残留。(The invention provides a high-efficiency molten iron desulphurization device, which comprises a liftable stirring and spraying unit and a desulfurizer blowing unit, wherein the stirring and spraying unit is arranged on the stirring and spraying unit; the desulfurizer blowing unit comprises a desulfurizer storage tank, a desulfurizer blowing pipe and a desulfurizer nozzle; the desulfurizer nozzle blows desulfurizer towards the molten iron flow discharged from the converter and poured into the molten iron tank; the stirring and spraying unit comprises a vertical stirring shaft and a stirring blade positioned at the lower end of the stirring shaft; the stirring blade can be lifted between the molten iron at the bottom of the molten iron tank and the space above the molten iron tank; the middle part of the stirring shaft is provided with an air inlet hole extending along the axial direction; the stirring blade is provided with air injection holes along the radial direction; the air injection hole is communicated with the air inlet hole; the air inlet end of the air inlet is connected with a first air inlet pipe and a second air inlet pipe in parallel; the first air inlet pipe is communicated with a desulfurizer blowing pipe; the second air inlet pipe is communicated with an inert gas pipeline. The invention fully mixes the desulfurizer with the molten iron, improves the use efficiency of the desulfurizer, and has high desulfurization efficiency; and simultaneously, the residue of the desulphurization slag can be effectively prevented.)

1. A high-efficiency molten iron desulphurization device comprises a converter (1) and a molten iron tank (2); the converter (1) is positioned above the hot metal ladle (2) and is used for pouring molten iron out of the converter to the hot metal ladle (2); the method is characterized in that: the desulfurizer blowing device also comprises a liftable stirring and spraying unit and a desulfurizer blowing unit; the desulfurizer blowing unit (3) comprises a desulfurizer storage tank (301), a desulfurizer blowing pipe (302) and a desulfurizer nozzle (303); the desulfurizer in the desulfurizer storage tank (301) is blown to a desulfurizer nozzle (303) along a desulfurizer blowing pipe (302), and the desulfurizer nozzle (303) blows the desulfurizer towards the molten iron flow discharged from the converter (1) and poured into the molten iron tank (2); a first isolating valve (304) is arranged in front of the desulfurizer nozzle (303);

the stirring and spraying unit (4) comprises a vertical stirring shaft (401) and a stirring blade (402) positioned at the lower end of the stirring shaft (401); the stirring blade (402) can be lifted between the molten iron at the bottom of the molten iron tank (2) and the space above the molten iron tank (2); the middle part of the stirring shaft (401) is provided with an air inlet hole (403) extending along the axial direction; the stirring blade (402) is provided with air injection holes (404) along the radial direction; the air injection hole (404) is communicated with the air inlet hole (403); the air inlet end of the air inlet hole (403) is connected with a first air inlet pipe (405) and a second air inlet pipe (406) in parallel; the first air inlet pipe (405) is communicated with a desulfurizer blowing pipe (302) and is provided with a second isolating valve (407); the second air inlet pipe (406) is used for introducing inert gas and is provided with a third isolating valve (408).

2. The efficient molten iron desulfurization apparatus according to claim 1, characterized in that: the blowing angle of the desulfurizer nozzle (303) is adjustable.

3. The efficient molten iron desulfurization apparatus according to claim 2, characterized in that: each stirring blade is provided with a plurality of air injection holes (404), and the plurality of air injection holes (404) are arranged along the vertical direction.

4. The efficient molten iron desulfurization apparatus according to claim 3, characterized in that: the device also comprises a plurality of vertical flow blocking rods (201); the flow blocking rods (201) are located in the hot metal ladle (2) and close to the inner wall of the hot metal ladle (2), and the flow blocking rods (201) are symmetrically arranged along the center of the hot metal ladle (2).

5. The efficient molten iron desulfurization apparatus according to claim 1, characterized in that: the device also comprises a desulfurization vehicle; the desulfurization vehicle comprises a bottom platform (501) and a tiltable hot metal tank mounting seat (502); a fixed support (503) and a hydraulic cylinder (504) are arranged at the upper end of the bottom platform (501); the lower end of the hydraulic cylinder (504) is connected to the bottom platform (501) through a first hinge shaft; one end of the hot metal ladle mounting seat (502) is connected above the fixed support (503) through a second hinged shaft; the other end of the hot metal ladle mounting seat (502) is connected to the upper end of the hydraulic cylinder (504) through a third articulated shaft; the first hinge shaft, the second hinge shaft and the third hinge shaft are parallel and are all horizontally arranged.

Technical Field

The invention relates to the technical field of molten iron treatment, in particular to a high-efficiency molten iron desulphurization device.

Background

Before molten iron enters a steel making furnace for smelting, a molten iron desulphurization procedure is required, the coke ratio of continuous steel casting and iron making is reduced, the productivity is improved, the lime consumption and the slag amount of steel making are reduced, and the production cost is reduced.

Disclosure of Invention

In order to solve the problems, the invention provides a high-efficiency molten iron desulphurization device, which can fully mix a desulfurizer with molten iron, improve the use efficiency of the desulfurizer and have high desulphurization efficiency; and simultaneously, the residue of the desulphurization slag can be effectively prevented.

The technical scheme is as follows: the invention provides a high-efficiency molten iron desulphurization device, which comprises a converter and a molten iron tank; the converter is positioned above the molten iron tank and used for pouring molten iron discharged from the converter to the molten iron tank; the desulfurizer blowing device also comprises a liftable stirring and spraying unit and a desulfurizer blowing unit; the desulfurizer blowing unit comprises a desulfurizer storage tank, a desulfurizer blowing pipe and a desulfurizer nozzle; blowing the desulfurizer in the desulfurizer storage tank to a desulfurizer nozzle along a desulfurizer blowing pipe, wherein the desulfurizer nozzle blows the desulfurizer towards the molten iron flow discharged from the converter and poured into the hot metal ladle; a first isolating valve is arranged in front of the desulfurizer nozzle;

the stirring and spraying unit comprises a vertical stirring shaft and a stirring blade positioned at the lower end of the stirring shaft; the stirring blade can be lifted between the molten iron at the bottom of the molten iron tank and the space above the molten iron tank; the middle part of the stirring shaft is provided with an air inlet hole extending along the axial direction; the stirring blades are provided with air injection holes along the radial direction; the air injection hole is communicated with the air inlet hole; the air inlet end of the air inlet is connected with a first air inlet pipe and a second air inlet pipe in parallel; the first air inlet pipe is communicated with a desulfurizer blowing pipe and is provided with a second isolating valve; the second intake pipe communicates the inert gas pipeline, and is provided with a third block valve.

Further, the blowing angle of the desulfurizer nozzle is adjustable.

Furthermore, each stirring blade is provided with a plurality of air injection holes which are arranged along the vertical direction.

Further, the device also comprises a plurality of vertical flow blocking rods; the flow blocking rods are located in the molten iron tank and close to the inner wall of the molten iron tank, and the flow blocking rods are symmetrically arranged along the center of the molten iron tank.

Further, the device also comprises a desulfurization vehicle; the desulfurization vehicle comprises a bottom platform and a tiltable hot metal tank mounting seat; a fixed support and a hydraulic cylinder are arranged at the upper end of the bottom platform; the lower end of the hydraulic cylinder is connected to the bottom platform through a first articulated shaft; one end of the hot metal ladle mounting seat is connected above the fixed support through a second articulated shaft; the other end of the hot metal ladle mounting seat is connected to the upper end of the hydraulic cylinder through a third hinge shaft; the first hinge shaft, the second hinge shaft and the third hinge shaft are parallel and are all horizontally arranged.

Has the advantages that: according to the invention, the desulfurizer is blown to the molten iron flow from the desulfurizer nozzle, the blown desulfurizer is involved into the descending molten iron flow, and the blown desulfurizer and the descending molten iron flow are both in a moving state and are fully mixed, so that the desulfurization efficiency is improved; when inert gas is blown into molten iron, the desulfurized slag suspended in the molten iron and the desulfurized slag attached to the inner wall of the molten iron can be forced to float to the surface of the molten iron in the floating process of the inert gas, and the floated desulfurized slag is discharged to prevent the desulfurized slag from remaining.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

Referring to fig. 1, a high-efficiency molten iron desulfurization apparatus includes a converter 1 and a molten iron tank 2; the converter 1 is positioned above the molten iron tank 2 and used for pouring molten iron discharged from the converter into the molten iron tank 2.

The invention also comprises a stirring and spraying unit and a desulfurizer blowing unit which can be lifted. The desulfurizer blowing unit 3 comprises a desulfurizer storage tank 301, a desulfurizer blowing pipe 302 and a desulfurizer nozzle 303; the desulfurizing agent in the desulfurizing agent storage tank 301 is blown along a desulfurizing agent blowing pipe 302 to a desulfurizing agent nozzle 303, and the desulfurizing agent nozzle 303 blows the desulfurizing agent toward the molten iron flow discharged from the converter 1 and poured into the molten iron tank 2. The blowing angle of the desulfurizer nozzle 303 is adjustable, and the desulfurizer nozzle is blown by matching with the descending track of molten iron flow. By blowing the desulfurizing agent from the desulfurizing agent nozzle 303 to the molten iron flow, the blown desulfurizing agent is entrained into the falling molten iron flow, and both the blown desulfurizing agent and the falling molten iron flow are in a moving state, so that the desulfurizing agent and the falling molten iron flow are fully mixed, and the desulfurizing efficiency is improved.

The stirring and spraying unit 4 comprises a vertical stirring shaft 401 and a stirring blade 402 positioned at the lower end of the stirring shaft 401; the stirring blade 402 can be lifted between the molten iron at the bottom of the molten iron tank 2 and the space above the molten iron tank 2; an air inlet 403 extending along the axial direction is formed in the middle of the stirring shaft 401; the stirring blade 402 is provided with air injection holes 404 along the radial direction; the air ejection holes 404 communicate with the air intake holes 403. The gas injection holes 404 blow inert gas into the molten iron along with the rotation of the stirring shaft 401, and in the floating process of the inert gas, the desulfurized slag suspended in the molten iron and the desulfurized slag attached to the inner wall of the molten iron tank 2 are forced to float to the surface of the molten iron, and the floated desulfurized slag is discharged. Preferably, each stirring blade is provided with a plurality of gas injection holes 404, and the plurality of gas injection holes 404 are arranged in a vertical direction, so that inert gas can be blown into the molten iron in a wider range.

A first block valve 304 is arranged in front of the desulfurizer nozzle 303. The air inlet end of the air inlet hole 403 is connected with a first air inlet pipe 405 and a second air inlet pipe 406 in parallel; the first air inlet pipe 405 is communicated with the desulfurizer blowing pipe 302 and is provided with a second isolating valve 407; the second inlet pipe 406 is used for introducing inert gas, and is provided with a third block valve 408.

When the device is normally used, the first isolating valve 304 is opened, the second isolating valve 407 is closed, and the desulfurizer is blown to the molten iron flow discharged from the converter 1 and poured into the molten iron tank 2; at the same time, the third block valve 408 is opened to inject the inert gas into the molten iron. After the converter 1 discharges and pours the molten iron to the molten iron tank 2, closing the first isolating valve 304; if the amount of the desulfurizing agent is not sufficient, the third block valve 408 is closed, the second block valve 407 is opened, and the desulfurizing agent is supplied through the gas injection holes 404.

In the molten iron desulphurization stirring process, a vortex region is formed at the center of the stirring shaft 401, the molten iron flow exchange rate is low, and meanwhile, a desulphurization machine is accumulated near the stirring shaft and cannot flow to play a desulphurization role because the vortex region has certain negative pressure. The invention therefore also comprises a plurality of vertical bars 201; the flow blocking rods 201 are located in the molten iron tank 2 and close to the inner wall of the molten iron tank 2, and are symmetrically arranged along the center of the molten iron tank 2. The flow blocking rod 201 disturbs the molten iron flow, inhibits the formation of a vortex region, accelerates the molten iron flow exchange in the central region, prevents the desulfurizing agent from accumulating near the stirring shaft 401, and improves the utilization rate of the desulfurizing agent.

The invention also comprises a desulfurization vehicle. The desulfurization vehicle comprises a bottom platform 501 and a tiltable hot metal tank mounting seat 502; the upper end of the bottom platform 501 is provided with a fixed support 103 and a hydraulic cylinder 504; the lower end of the hydraulic cylinder 104 is connected to the bottom platform 501 through a first hinge shaft; one end of the hot metal ladle mounting seat 502 is connected above the fixed support 503 through a second hinge shaft; the other end of the hot metal ladle mounting seat 502 is connected to the upper end of the hydraulic cylinder 504 through a third hinge shaft; the first hinge shaft, the second hinge shaft and the third hinge shaft are parallel and are all horizontally arranged.

After the desulfurization is finished, the hot metal ladle 2 needs to be tipped over and slag-off. When the hot metal ladle is tipped, the hydraulic cylinder 504 extends, the hot metal ladle mounting seat 502 rotates along the second hinge shaft to tip, and the extension stroke of the hydraulic cylinder 504 can be adjusted according to the requirement of the tipping angle; on reset, the hydraulic cylinder 504 is retracted. The desulfurization vehicle can realize the tipping of the hot metal ladle, and has the advantages of stable structure, simple and convenient operation and high reliability.