CN213295397U - Titanium removing device for molten iron in blast furnace iron runner - Google Patents
Titanium removing device for molten iron in blast furnace iron runner Download PDFInfo
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- CN213295397U CN213295397U CN202020702879.5U CN202020702879U CN213295397U CN 213295397 U CN213295397 U CN 213295397U CN 202020702879 U CN202020702879 U CN 202020702879U CN 213295397 U CN213295397 U CN 213295397U
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Abstract
The utility model discloses a titanium device is taken off to blast furnace iron runner molten iron, including the iron runner and arrange the titanium device that takes off of iron runner top in, the titanium device that takes off includes the hopper, unloading pipeline and tonifying qi pipeline, install the unloading valve on the unloading pipeline, with hopper bottom slope is connected, the air inlet and the tonifying qi equipment of tonifying qi pipeline are connected, the gas outlet of tonifying qi pipeline with the middle part slope intercommunication of unloading pipeline installs the flowmeter on the tonifying qi pipeline. This blast furnace iron runner molten iron takes off titanium device for take off titanium device is difficult for suffering from the destruction, has reduced the loss rate of device, has increased the efficiency of taking off the titanium agent simultaneously, and whole operation process is very convenient, provides the possibility for continuity of operation, has increased work efficiency.
Description
Technical Field
The utility model relates to the technical field of molten iron titanium removal, in particular to a titanium removal device for molten iron in a blast furnace iron runner.
Background
In the later stage of the blast furnace production, the refractory material is affected by factors such as molten iron mechanical scouring, carburizing reaction, thermal stress, harmful element erosion and the like, and the refractory material is eroded to different degrees, so that the safety production of the blast furnace is threatened. Blast furnace hearth refractory material mainly is the carbon brick, because the carbon brick has good heat conductivity, has consequently formed certain temperature gradient in the region that the hearth edge is close to the carbon brick hot side, when the molten iron temperature is less than 1150 ℃, forms the viscous layer at the carbon brick hot side, avoids the direct and flowing molten iron contact of carbon brick, has played the effect of protection carbon brick. When the flow velocity of molten iron at the edge of the hearth is accelerated and the forced convection between the molten iron and the carbon bricks is enhanced, the temperature at the edge of the hearth rises, the viscous layer melts, the molten iron directly contacts the carbon bricks, and the carbon bricks are corroded. If the molten iron contains a certain amount of titanium, the titanium in the molten iron reacts with carbon and nitrogen to generate titanium compounds containing carbon and nitrogen, the titanium compounds are attached to the hot surface of the carbon brick to isolate the molten iron and the carbon brick, and the melting point of the titanium compounds exceeds 3000 ℃, so that the titanium compounds have a good protection effect on refractory materials. In order to form a titanium compound protective layer on the hearth, it is necessary to increase the titanium content in the molten iron, and generally, the titanium content in the molten iron during the furnace maintenance is higher than 0.12%, which affects the production of high-quality steel. In order to ensure the long service life and safe production of the blast furnace and reduce the influence on the production of high-quality steel, the development of a titanium removing technology in front of the blast furnace is necessary.
However, in the conventional molten iron titanium removing apparatus, although the apparatus has a good effect, the stirring apparatus is easily damaged, or the apparatus directly adds the titanium removing agent to the ladle, which affects the actual titanium removing effect, or the apparatus separately adds the bottom-blowing gas and the titanium removing agent to the ladle, which is easily damaged, and the bottom-blowing gas and the titanium removing agent are not sufficiently contacted with each other and cannot be continuously operated.
In view of the problems of poor effect, easy damage and no continuous operation of the existing titanium removing device, the development of the titanium removing device for the molten iron in the blast furnace iron runner, which has ideal effect, is simple and difficult to damage and can be used continuously, is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a titanium device is taken off to blast furnace iron runner molten iron solves current titanium device and takes off that the titanium effect is not good, and the device is fragile and problem that can not continuous operation.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a titanium device is taken off to blast furnace iron runner molten iron, includes the iron runner and arranges the titanium device that takes off above the iron runner in, the titanium device that takes off includes the hopper, unloading pipeline and tonifying qi pipeline, install the unloading valve on the unloading pipeline, with hopper bottom slope is connected, the air inlet and the tonifying qi equipment connection of tonifying qi pipeline, the gas outlet of tonifying qi pipeline with the middle part slope intercommunication of unloading pipeline installs the flowmeter on the tonifying qi pipeline.
Preferably, the included angle between the air supply pipeline and the blanking pipeline is 5-60 degrees.
Preferably, the blanking pipeline is a chute, the diameter of the chute is 2-10cm, the length of the chute is 0.5-2m, the included angle between a discharge hole at the bottom of the blanking pipeline and the liquid level of the horizontal molten iron in the iron runner is 30-90 degrees, and the distance between the discharge hole and the liquid level of the horizontal molten iron in the iron runner is 5-20 cm.
Preferably, the diameter of the gas supplementing pipeline is 1-3cm, the gas flow is 10-100L/min, the gas is pure nitrogen, pure oxygen or mixed gas of nitrogen and oxygen, and the flow meter arranged on the gas supplementing pipeline is a turbine flow meter.
The utility model has the advantages that:
according to the molten iron titanium removing device for the blast furnace iron runner, the titanium removing device is arranged above the iron runner, so that the titanium removing device is not easy to damage, and the loss rate of the device is reduced;
the blanking pipeline is connected with the air supply pipeline, and air blowing is carried out while blanking, so that the full combination and reaction of the titanium removing agent and molten iron are ensured, and the efficiency of the titanium removing agent is increased;
meanwhile, the titanium removing device is independent of the iron runner, so that the whole operation is very convenient, the possibility is provided for continuous operation, and the working efficiency is improved.
The titanium removing device for the molten iron in the blast furnace iron runner has a simple main structure, is easy to operate, protects the device while ensuring the effect of a titanium removing agent, reduces the cost and improves the efficiency.
Drawings
FIG. 1 is a schematic front view of the apparatus for removing titanium from molten iron in a blast furnace iron runner;
in the figure: 1 hopper, 2 blanking pipelines, 3 blanking valves, 4 air supply pipelines, 5 flow meters, 6 iron runners and 7 titanium removal devices.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Unless defined otherwise, all references to up, down, left, right, front, back, inner and outer directions herein are to be interpreted as referring to up, down, left, right, front, back, inner and outer directions in the drawings to which the invention is applied, and all references are hereby incorporated herein by reference.
The utility model provides a as shown in figure 1 a titanium device is taken off to blast furnace iron runner molten iron, including iron runner 6 and the titanium device 7 that takes off of arranging iron runner 6 top in, it includes hopper 1 to take off titanium device 7, unloading pipeline 2 and tonifying qi pipeline 4, install unloading valve 3 on the unloading pipeline 2, with the slope of 1 bottom of hopper is connected, tonifying qi pipeline 4's air inlet and tonifying qi equipment are connected, tonifying qi pipeline 4's gas outlet with the middle part slope intercommunication of unloading pipeline 2 installs flowmeter 5 on the tonifying qi pipeline 4. The titanium removing device is arranged above the iron runner, so that the titanium removing device is not in direct contact with molten iron in the iron runner, the damage of the direct contact to the titanium removing device is reduced, and the loss rate of the titanium removing device is reduced.
Specifically, the included angle between the air supply pipeline 4 and the blanking pipeline 2 is 5-60 degrees. The gas is ensured to be better contacted with the titanium removing agent, and the gas enters the iron runner to better react with molten iron.
Specifically, the blanking pipeline 2 is a chute, the diameter is 2-10cm, the length is 0.5-2m, the included angle between a discharge hole at the bottom of the blanking pipeline 2 and the liquid level of the horizontal molten iron in the iron runner 6 is 30-90 degrees, and the distance is 5-20 cm. Controlling the distance and angle from the blanking pipeline to the molten iron liquid level in the iron runner; the full reaction of the titanium removing agent and the molten iron is ensured, and the density of the titanium removing agent is often lower than that of the molten iron, so that the titanium removing agent can easily float on the surface when entering the molten iron, and the titanium removing agent is more reasonably added through a blanking pipeline arranged above an iron runner.
Specifically, the diameter of the gas supplementing pipeline 4 is 1-3cm, the gas flow is 10-100L/min, the gas is pure nitrogen, pure oxygen or mixed gas of nitrogen and oxygen, and the flow meter 5 arranged on the gas supplementing pipeline 4 is a turbine flow meter. The air supply pipeline is connected with the blanking pipeline, so that the flow velocity of the titanium removing agent in the air supply pipeline is increased, a certain impact force is ensured when the titanium removing agent enters molten iron, the stirring effect between the titanium removing agent and the molten iron is enhanced, the titanium removing reaction rate is improved, meanwhile, oxygen in mixed gas can also participate in the titanium removing reaction, and the titanium removing efficiency is improved.
Specific example 1:
the titanium removing agent used in the test is the internal return ore of a sintering machine, the granularity is about 3-5mm, and the components are shown in Table 1. The proportion of the titanium removing agent selected in the test is 0.5 percent respectively, and the gas supplementing valve is not opened in the embodiment 1.
TABLE 1 sinter return chemistry
| TFe | SiO2 | Al2O3 | CaO | MgO | |
| Return of agglomerate | 53.61 | 5.64 | 2.32 | 10.76 | 1.61 |
About 160t of the ladle for the test, 0.5% of the titanium removing agent and about 800kg of the ladle for the test were added, and the molten iron compositions before and after the test are shown in Table 2. The titanium content in the molten iron before the titanium removal test is 0.077%, after the titanium removal test is carried out by adding 0.5% of titanium removal agent, the titanium content in the molten iron is reduced to 0.0615%, the titanium content is reduced by about 20%, meanwhile, elements such as silicon, sulfur, phosphorus and the like in the molten iron are slightly reduced, the manganese content is not changed, and the temperature of the molten iron is reduced to 77 ℃.
TABLE 2 molten iron composition comparison before and after the titanium removal test with 0.5% titanium removal agent
Specific example 2:
the titanium removing agent used in the test is the internal return ore of the sintering machine, the granularity is about 3-5mm, and the components are shown in Table 3. The proportion of the titanium removing agent selected in the test is 0.75 percent respectively, and the gas supplementing valve is not opened in the embodiment 2.
TABLE 3 sinter return chemistry
| TFe | SiO2 | Al2O3 | CaO | MgO | |
| Return of agglomerate | 53.61 | 5.64 | 2.32 | 10.76 | 1.61 |
About 160t of the ladle for the test, about 1200kg of the titanium remover in a proportion of 0.75% was added, and the molten iron composition before and after the test is shown in Table 4. The titanium content in the molten iron before the titanium removal test is 0.122%, after the titanium removal test is carried out by adding 0.75% of titanium removal agent, the titanium content in the molten iron is reduced to 0.087%, which is reduced by about 29%, meanwhile, elements such as silicon, phosphorus, manganese and the like in the molten iron are reduced, the sulfur content is increased, and the temperature of the molten iron is reduced to 98 ℃.
TABLE 4 iron melt composition comparison before and after the titanium removal test with 0.75% titanium removal agent
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (4)
1. The utility model provides a titanium device is taken off to blast furnace iron runner molten iron, includes iron runner (6) and arranges titanium device (7) that takes off in iron runner (6) top in, its characterized in that:
the titanium removing device (7) comprises: the device comprises a hopper (1), a blanking pipeline (2) and an air supplementing pipeline (4);
a blanking valve (3) is arranged on the blanking pipeline (2) and is obliquely connected with the bottom of the hopper (1);
the air inlet of the air supply pipeline (4) is connected with air supply equipment, the air outlet of the air supply pipeline (4) is obliquely communicated with the middle of the blanking pipeline (2), and the air supply pipeline (4) is provided with a flow meter (5).
2. The titanium removing device for the molten iron in the blast furnace iron runner according to claim 1, characterized in that:
the included angle between the air supply pipeline (4) and the blanking pipeline (2) is 5-60 degrees.
3. The titanium removing device for the molten iron in the blast furnace iron runner according to claim 1, characterized in that:
the blanking pipeline (2) is a chute, the diameter is 2-10cm, and the length is 0.5-2 m.
4. The titanium removing device for the molten iron in the blast furnace iron runner according to claim 1, characterized in that:
the diameter of the air supply pipeline (4) is 1-3cm, the gas flow in the air supply pipeline (4) is 10-100L/min, the gas in the air supply pipeline (4) is pure nitrogen or pure oxygen or mixed gas of nitrogen and oxygen, and the flow meter (5) installed on the air supply pipeline (4) is a turbine flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020702879.5U CN213295397U (en) | 2020-04-30 | 2020-04-30 | Titanium removing device for molten iron in blast furnace iron runner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020702879.5U CN213295397U (en) | 2020-04-30 | 2020-04-30 | Titanium removing device for molten iron in blast furnace iron runner |
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| CN213295397U true CN213295397U (en) | 2021-05-28 |
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