CN211170735U

CN211170735U - Molten iron desulphurization device

Info

Publication number: CN211170735U
Application number: CN201921891011.8U
Authority: CN
Inventors: 范冰
Original assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd
Current assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-08-04
Anticipated expiration: 2029-11-05

Abstract

The utility model provides a molten iron desulphurization device, including the desulfurization car and be located the hot metal bottle of 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 intake pipe and a plurality of horizontally L type nozzle, the (mixing) shaft has seted up the cavity along the axial, the intake pipe imbeds the cavity of (mixing) shaft, a plurality of L type nozzles are along intake pipe central symmetry arrangement in the periphery of intake pipe, and all lie in stirring vane's below, every L type nozzle includes first straight tube section and second straight tube section, the inner of the first straight tube section of every L type nozzle communicates the intake pipe, and along intake pipe radial arrangement, the outer end of second straight tube section vertical connection in first straight tube section, the utility model discloses an equipment structure is compact, improves the availability factor of desulfurizer.

Description

Molten iron desulphurization device

Technical Field

The utility model relates to a molten iron processing technology field, concretely relates to molten iron 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.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a molten iron desulphurization device, which has compact equipment structure; the use efficiency of the desulfurizer is improved, and the desulfurization efficiency is high.

The technical scheme includes that the molten iron desulphurization device comprises a desulphurization vehicle, a molten iron tank located above the desulphurization 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 be lifted and lowered 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 an air inlet pipe and a plurality of horizontal L-type nozzles, the stirring shaft is axially provided with a cavity, the air inlet pipe is embedded into the cavity of the stirring shaft, the plurality of L-type nozzles are symmetrically arranged on the periphery of the air inlet pipe along the center of the air inlet pipe and are located below the stirring blades, each L-type nozzle comprises a first straight pipe section and a second straight pipe section, the inner end of the first straight pipe section of each L-type nozzle is communicated with and is radially arranged along the air inlet pipe, and the second straight pipe section is vertically.

Further, each second straight pipe section is bent towards 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 air inlet pipe of the utility model is embedded into the cavity of the stirring shaft, and is integrally assembled, the structure is compact, and the space is saved;

b. 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;

c. 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;

d. 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 air inlet tube and L type nozzle of the present invention.

Detailed Description

Referring to fig. 1, a molten iron 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.

As shown in fig. 2, the stirring and spraying device further comprises an air inlet pipe 5 and a plurality of horizontal L-type nozzles 6, wherein the stirring shaft 3 is provided with a cavity along the axial direction, the air inlet pipe 5 is embedded into the cavity of the stirring shaft 3, and the plurality of L-type nozzles 6 are symmetrically arranged on the periphery of the air inlet pipe 5 along the center of the air inlet pipe 5 and are all located below the stirring blades 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 air inlet pipe 5 and is arranged along the radial direction of the air inlet 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 a 5 embedding (mixing) shaft 3's of intake pipe cavitys, an organic whole assemblies, compact 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, spiral rising motion is made to the desulfurizer in the molten iron, 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 desulfurizer dissolves with higher speed.

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

1. The molten iron desulphurization device comprises a desulphurization vehicle and a molten iron tank (2) positioned above the desulphurization vehicle, and is characterized by further comprising a liftable stirring and spraying device, wherein 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 lift between the molten iron at the bottom of the molten iron tank (2) and the space above the molten iron tank (2), the stirring and spraying device further comprises an air inlet pipe (5) and a plurality of horizontal L-type nozzles (6), the stirring shaft (3) is provided with a cavity along the axial direction, the air inlet pipe (5) is embedded into the cavity of the stirring shaft (3), the plurality of L-type nozzles (6) are symmetrically arranged on the periphery of the air inlet pipe (5) along the center of the air inlet pipe (5) and are 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 first straight pipe section (601) of each L-type nozzle (6) is communicated with the inner end of the second straight pipe section (601) in the radial direction, and is arranged along the inner end of the straight pipe section.

2. The molten iron desulphurization device according to claim 1, wherein the second straight pipe section (602) of each L-shaped nozzle (6) is bent in the same rotation direction.

3. The molten iron desulphurization 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).

4. The molten iron desulfurization apparatus according to claim 3, 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).

5. The molten iron 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.