CN211170749U - Molten iron blowing desulfurization device - Google Patents
Molten iron blowing desulfurization device Download PDFInfo
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- CN211170749U CN211170749U CN201922062724.XU CN201922062724U CN211170749U CN 211170749 U CN211170749 U CN 211170749U CN 201922062724 U CN201922062724 U CN 201922062724U CN 211170749 U CN211170749 U CN 211170749U
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Abstract
The utility model provides a molten iron blowing desulphurization device, including desulfurization car and the hot metal bottle that is located desulfurization car top, still include liftable stirring injection apparatus, stirring injection apparatus is located the hot metal bottle directly over, including vertical (mixing) shaft and the stirring vane who is located the (mixing) shaft lower extreme, stirring vane can go up and down between the hot metal bottle bottom molten iron and the hot metal bottle space above, stirring injection apparatus still includes inlet pipe and a plurality of horizontally L type nozzle, the (mixing) shaft has seted up gas storage bin and branch gas storehouse along the axial, be equipped with the intake pipe on the gas storage bin, be equipped with the pipe in the branch gas storehouse, the last port and the gas storage bin intercommunication of pipe, the lower port and the branch gas storehouse intercommunication of pipe, be equipped with a plurality of fumaroles on the lateral wall of the branch gas storehouse that is located the hot metal bottle, the inlet pipe passes the gas storage bin, a plurality of L type nozzles along inlet pipe central symmetry arrangement in the periphery of inlet pipe, and all be located stirring vane's below.
Description
Technical Field
The utility model relates to a molten iron processing technology field, concretely relates to molten iron jetting desulphurization unit.
Background
The molten iron desulphurization equipment comprises KR mechanical stirring equipment and blowing desulphurization equipment.
KR mechanical stirring is to pour refractory material and the cross stirring head that toasts, immerses certain degree of depth in the ladle molten bath, borrows the swirl that its rotation produced, and the desulfurizer through weighing is added to the molten iron surface by the dispenser to be drawn into in the molten iron by the swirl and make calcium oxide base desulfurization powder fully contact the reaction with the molten iron, reach the desulfurization purpose. The method has the advantages of superior dynamic conditions, being beneficial to adopting a cheap desulfurizer such as CaO, having more stable desulfurization effect, high efficiency (desulfurization is less than or equal to 0.005 percent), low consumption of the desulfurizer and being suitable for steel mills with high requirements and large proportion of low-sulfur steel varieties; the disadvantages are that the equipment is complex, the one-time investment is large, and the temperature drop of the desulfurized molten iron is large.
The blowing desulfurization is to utilize N2The gas is used as a carrier, the granular magnesium desulfurizer is sprayed into the molten iron by a spray gun, and the carrier gas simultaneously plays a role in stirring the molten iron, so that the sprayed gas, the desulfurizer and the molten iron are fully mixed for desulfurization. Its advantages are low cost, flexible operation, short blowing time and low temp. drop of molten iron. Compared with KR mechanical stirring, the method has less one-time investment and is suitable for low-cost technical transformation of small and medium-sized enterprises; the disadvantage of the blowing method is that the kinetic conditions are poor.
In the prior art, KR mechanical stirring desulfurization and blowing desulfurization are combined for use, so that the molten iron desulfurization effect can be improved to a certain degree, but the respective advantages are not fully exerted, and the high-efficiency complementation of KR mechanical stirring desulfurization and blowing desulfurization cannot be formed. And KR mechanical stirring sweetener's structure and jetting sweetener's structure stack cause the structure of molten iron desulphurization unit complicated, and the space is narrow and small, and the operation is inconvenient, and the maintenance is difficult. In addition, the existing desulfurization equipment generally has the defects of weak stirring force, single stirring direction, insufficient stirring, partial desulfurizing agent which is not involved in desulfurization and floats up to slag, and partial desulfurizing product which floats up insufficiently still in molten iron, so that the desulfurization effect is poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a molten iron blowing and desulfurizing device which has compact equipment structure; the stirring force is strong, the service efficiency of the desulfurizer is improved, and the desulfurization efficiency is high.
The technical scheme includes that the molten iron blowing desulfurization device comprises a desulfurization vehicle, a molten iron tank located above the desulfurization vehicle and a liftable stirring and spraying device, wherein the stirring and spraying device is located right above the molten iron tank and comprises a vertical stirring shaft and stirring blades located at the lower end of the stirring shaft, the stirring blades can lift between the molten iron at the bottom of the molten iron tank and a space above the molten iron tank, the stirring and spraying device further comprises a feeding pipe and a plurality of horizontal L-type nozzles, the stirring shaft is axially provided with a gas storage bin and a gas distribution bin, the gas storage bin is provided with a gas inlet pipe, a guide pipe is arranged in the gas distribution bin, an upper port of the guide pipe is communicated with the gas storage bin, a lower port of the guide pipe is communicated with the gas distribution bin, a plurality of gas injection holes are formed in the side wall of the gas distribution bin located in the molten iron tank, the feeding pipe penetrates through the gas storage bin, and the plurality of L-type nozzles are symmetrically arranged on the periphery of the feeding pipe along the center of.
Further, each L-type nozzle comprises a first straight pipe section and a second straight pipe section, wherein the inner end of the first straight pipe section of each L-type nozzle is communicated with the feeding pipe and is arranged along the radial direction of the feeding pipe, and the second straight pipe section is vertically connected to the outer end of the first straight pipe section.
Further, the second straight pipe section of each L-type nozzle is bent in the same rotating direction.
Further, the bending direction of the second straight pipe section of each L type nozzle is the same as the rotating direction of the stirring shaft.
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 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; first articulated shaft, second articulated shaft and first articulated shaft are parallel and equal horizontal arrangement.
Has the advantages that: a. the feeding pipe of the utility model passes through the gas storage bin of the stirring shaft, and is integrally assembled, the structure is compact, and the space is saved;
b. the inert gas is sprayed out of the gas injection holes through the gas storage bin and the gas distribution bin, 360-degree all-dimensional stirring is realized, the stirring force is improved, and in the floating process of the inert gas, the desulphurization slag suspended in the molten iron and the desulphurization slag attached to the inner wall of the molten iron tank are forced to float to the surface of the molten iron, so that the floated desulphurization slag is discharged, and the desulphurization slag is prevented from remaining;
c. the injection direction of the L type nozzle is the same as the rotation direction of the stirring shaft, and stirring blades stir along the initial rotation direction of the stirring blade in the rising process of the desulfurizer, so that a desulfurization machine and molten iron are mixed more uniformly, and the dissolution of the desulfurizer is accelerated;
d. the flow blocking rod disturbs the flow of the molten iron, inhibits the formation of a vortex region, accelerates the flow exchange of the molten iron in a central region, prevents a desulfurizing agent from accumulating near the stirring shaft, and improves the utilization rate of the desulfurizing agent;
e. the hot metal bottle of desulfurization car realizes tipping through the pneumatic cylinder, and stable in structure, easy and simple to handle, the reliability is high.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the feed tube and L-type nozzle of the present invention.
Detailed Description
Referring to fig. 1, a molten iron blowing desulfurization apparatus includes a desulfurization truck and a molten iron tank 2 located above the desulfurization truck; also comprises a stirring and spraying device which can be lifted. The stirring and spraying device is positioned right above the molten iron tank 2 and comprises a vertical stirring shaft 3 and a stirring blade 4 positioned at the lower end of the stirring shaft 3; the stirring blade 4 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 stirring shaft 3 is provided with a gas storage bin 8 and a gas distribution bin 9 along the axial direction. An air inlet pipe 10 is arranged on the air storage bin 8, and inert gas is introduced into the air inlet pipe 10; a guide pipe 11 is arranged in the gas distribution bin 9, the upper port of the guide pipe 11 is communicated with the gas storage bin 8, and the lower port of the guide pipe 11 is communicated with the gas distribution bin 3; and a plurality of gas injection holes 12 are arranged on the side wall of the gas distribution bin 8 positioned in the molten iron tank 2. The inert gas enters the gas storage bin 8 through the gas inlet pipe 10, enters the gas distribution bin 9 through the guide pipe 11, and is sprayed out of the gas spraying holes 12.
The utility model discloses an increase a route that lets in inert gas in to hot metal bottle 2, realized 360 degrees all-round stirring, can improve the stirring power, inert gas come-up in-process, make the desulfurization sediment of suspension in the molten iron and adhere to the desulfurization sediment on 2 inner walls of hot metal bottle force to float to the molten iron surface, and the desulfurization sediment that will float up is discharged, prevents that the desulfurization sediment from remaining.
As shown in fig. 2, the stirring and spraying device further comprises a feeding pipe 5 and a plurality of horizontal L-type nozzles 6, wherein the feeding pipe 5 penetrates through the gas storage bin 8, and the plurality of L-type nozzles 6 are symmetrically arranged on the periphery of the feeding pipe 5 along the center of the feeding pipe 5 and are all positioned below the stirring blade 4.
Each L-type nozzle 6 comprises a first straight pipe section 601 and a second straight pipe section 602, the inner end of the first straight pipe section 601 of each L-type nozzle 6 is communicated with the feeding pipe 5 and is arranged along the radial direction of the feeding pipe 5, the second straight pipe section 602 is vertically connected to the outer end of the first straight pipe section 601, and the bending direction of the second straight pipe section 602 of each L-type nozzle 6 is the same as the rotating direction of the stirring shaft 3.
The utility model discloses an inlet pipe 5 imbeds (mixing) shaft 3's cavity, an organic whole assembly, moreover, the steam generator is compact in structure, save space, it is rotatory that (mixing) shaft 3 is followed to a plurality of L type nozzles 6, spray the desulfurizer along rotatory tangential direction, simultaneously because of the come-up of desulfurizer, the spiral shell screwing in carries out the ascending motion in the molten iron to the desulfurizer, the removal length of desulfurizer in the molten iron has been increased, the contact time of desulfurizer with the molten iron has been prolonged, L type nozzle 6's spray direction is the same with (mixing) shaft 3 direction of rotation, the desulfurizer rises the in-process, stirring vane 4 stirs along its initial direction of rotation, make desulfurization machine and molten iron mix more evenly.
The utility model discloses an among the molten iron desulfurization stirring process, the center department at (mixing) shaft place can form the vortex region, and molten iron flow exchange rate is low, simultaneously because the vortex region has certain negative pressure for L type nozzle 6 sprays the desulfurization machine and gather near the (mixing) shaft, can not flow and exert the desulfurization effect, consequently the utility model discloses still include a plurality of vertical fender flow pole 7, fender flow pole 7 is located molten iron jar 2 and is close to 2 inner walls of molten iron jar, and keeps off the central symmetrical arrangement of flow pole along molten iron jar 2, fender flow pole 7 produces the disturbance to the molten iron flow, has restrained the formation in vortex region for the regional molten iron flow exchange in center prevents that the desulfurizer from gathering near the (mixing) shaft, improves the utilization ratio of desulfurizer.
The desulfurization vehicle comprises a bottom platform 101 and a tiltable hot metal ladle mounting seat 102; the upper end of the bottom platform 101 is provided with a fixed support 103 and a hydraulic cylinder 104; the lower end of the hydraulic cylinder 104 is connected to the bottom platform 101 through a first articulated shaft; one end of the hot metal ladle mounting seat 102 is connected above the fixed support 103 through a second hinge shaft; the other end of the hot metal ladle mounting seat 102 is connected to the upper end of the hydraulic cylinder 104 through a third hinge shaft; first articulated shaft, second articulated shaft and first articulated shaft are parallel and equal horizontal arrangement.
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 104 extends, the hot metal ladle mounting seat 102 rotates along the second hinge shaft to tip, and the extension stroke of the hydraulic cylinder 104 can be adjusted according to the requirement of the tipping angle; on reset, the hydraulic cylinder 104 is retracted. The utility model discloses a desulfurization car can realize that the hot metal bottle tumbles, stable in structure, and is easy and simple to handle, and the reliability is high.
Claims (6)
1. A molten iron injection desulfurization device comprises a desulfurization vehicle and a molten iron tank (2) located above the desulfurization vehicle, and is characterized by further comprising a liftable stirring and spraying device, wherein the stirring and spraying device is located right above the molten iron tank (2) and comprises a vertical stirring shaft (3) and a stirring blade (4) located at the lower end of the stirring shaft (3), the stirring blade (4) can lift between molten iron at the bottom of the molten iron tank (2) and a space above the molten iron tank (2), the stirring and spraying device further comprises a feeding pipe (5) and a plurality of horizontal L type nozzles (6), the stirring shaft (3) is axially provided with a gas storage bin (8) and a gas distribution bin (9), the gas storage bin (8) is provided with a gas inlet pipe (10), a guide pipe (11) is arranged in the gas distribution bin (9), an upper end opening of the guide pipe (11) is communicated with the gas storage bin (8), a lower end opening of the guide pipe (11) is communicated with the gas distribution bin (9), a plurality of gas injection holes (12) are formed in the side wall of the gas distribution bin (9) located in the molten iron tank (2), and the plurality of gas injection holes (355) are symmetrically arranged below the feeding pipe (84).
2. The molten iron blowing desulfurization device according to claim 1, characterized in that each L-type nozzle (6) comprises a first straight pipe section (601) and a second straight pipe section (602), the inner end of the first straight pipe section (601) of each L-type nozzle (6) is communicated with the feeding pipe (5) and is arranged along the radial direction of the feeding pipe (5), and the second straight pipe section (602) is vertically connected with the outer end of the first straight pipe section (601).
3. The molten iron blowing desulfurization apparatus according to claim 2, wherein the second straight pipe section (602) of each L-type nozzle (6) is bent in the same rotational direction.
4. The molten iron blowing desulfurization device according to claim 2, wherein the second straight pipe section (602) of each L-shaped nozzle (6) is bent in the same direction as the rotation direction of the stirring shaft (3).
5. The molten iron blowing desulfurization apparatus according to claim 4, characterized in that: the device also comprises a plurality of vertical flow blocking rods (7); the flow blocking rods (7) are positioned in the hot metal ladle (2) and close to the inner wall of the hot metal ladle (2), and are symmetrically arranged along the center of the hot metal ladle (2).
6. The molten iron blowing desulfurization apparatus according to claim 1, characterized in that: the desulfurization vehicle comprises a bottom platform (101) and a tiltable hot metal ladle mounting seat (102); a fixed support (103) and a hydraulic cylinder (104) are arranged at the upper end of the bottom platform (101); the lower end of the hydraulic cylinder (104) is connected to the bottom platform (101) through a first articulated shaft; one end of the hot metal ladle mounting seat (102) is connected above the fixed support (103) through a second hinge shaft; the other end of the hot metal ladle mounting seat (102) is connected to the upper end of the hydraulic cylinder (104) through a third hinge shaft; first articulated shaft, second articulated shaft and first articulated shaft are parallel and equal horizontal arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062724.XU CN211170749U (en) | 2019-11-26 | 2019-11-26 | Molten iron blowing desulfurization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062724.XU CN211170749U (en) | 2019-11-26 | 2019-11-26 | Molten iron blowing desulfurization device |
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| CN211170749U true CN211170749U (en) | 2020-08-04 |
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| CN201922062724.XU Active CN211170749U (en) | 2019-11-26 | 2019-11-26 | Molten iron blowing desulfurization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110791615A (en) * | 2019-11-26 | 2020-02-14 | 张家港宏昌钢板有限公司 | Molten iron blowing desulfurization device |
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2019
- 2019-11-26 CN CN201922062724.XU patent/CN211170749U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110791615A (en) * | 2019-11-26 | 2020-02-14 | 张家港宏昌钢板有限公司 | Molten iron blowing desulfurization device |
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