Blowing system for blowing solid oxide and oxygen

Abstract

The utility model relates to a blowing system for blowing solid oxide and oxygen, which comprises a stock bin and a screw feeder connected with a discharge port of the stock bin, an oxygen lance comprises a lance body, the lance body comprises an outer pipe and an inner pipe positioned in the outer pipe, the inner pipe is connected with an oxygen pipe, an annular cavity is formed between the outer pipe and the inner pipe, and the outer pipe is connected with the oxygen pipe. And the conveying pipeline is also connected with an air supply pipe for supplying air to the annular cavity and driving the solid oxide to the oxygen lance. When the solid oxide conveying device is used, solid oxide in the stock bin is conveyed through the screw feeder, the conveying amount of the solid oxide is adjusted by adjusting the conveying speed of the screw feeder, then gas in the gas conveying pipe enters the conveying pipeline, the solid oxide is conveyed into the annular cavity, oxygen is conveyed into the inner pipe through the oxygen pipe, and the solid oxide is conveyed into the inner pipe through the oxygen pipe. The oxygen and the solid oxide are injected into the molten iron, and the solid oxide is quantitatively conveyed through the screw feeder, so that a complete oxygen and solid oxide feeding system is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the metallurgy field especially relates to solid oxide and oxygen delivery technical field, concretely refers to a kind of solid oxide and oxygen injection system for injection. BACKGROUND

[0002] In the metallurgical production process, it is a very necessary operation to inject solid oxide (such as iron oxide scale, dust, ore powder, magnesium powder, etc.) into the metal bath, which aims to increase the content of oxides in the slag, increase the basicity of the slag, achieve the effect of rapid slagging, dephosphorization and desiliconization, and also adjust the composition and temperature of the molten pool, promote the oxidation and removal of impurities, and thus improve the quality of molten steel.

[0003] The iron injection desulfurization nozzle anti-blocking lance disclosed in the Chinese patent application No. CN201510683282.4 only discloses the lance, and cannot guarantee the amount of solid oxide delivered, so it cannot form a complete system. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of solid oxide and oxygen injection system for injection for the deficiency of prior art, uses screw feeder to quantitatively deliver solid oxide, so as to guarantee the quantitative supply of solid oxide, so as to form a complete oxygen and solid oxide feeding system.

[0005] The utility model is realized through the following technical scheme, a kind of solid oxide and oxygen injection system for injection, including the bin of containing solid oxide, with the screw feeder of bin discharge port connection, and oxygen lance, the oxygen lance includes gun body, the gun body includes outer tube, and the inner tube in outer tube, the inner tube is connected with oxygen pipe, and ring cavity is formed between outer tube and inner tube, the screw feeder is communicated with ring cavity by conveying pipeline, the conveying pipeline is also connected with the gas pipe that sends gas to ring cavity and drives solid oxide to oxygen lance.

[0006] When using, the solid oxide in bin is delivered by screw feeder, the amount of solid oxide delivery is adjusted by adjusting the delivery speed of screw feeder, then the gas in gas pipe enters into conveying pipeline, and solid oxide is delivered to ring cavity, oxygen pipe delivers oxygen to inner tube, and oxygen and solid oxide are injected into molten iron, solid oxide is quantitatively delivered by screw feeder, so as to guarantee the quantitative supply of solid oxide, so as to form a complete oxygen and solid oxide feeding system.

[0007] As preferred, the oxygen lance further includes a lance head at the end of the gun body, the lance head is provided with an oxygen inlet hole communicated with the inner tube and a plurality of feeding holes communicated with the ring cavity, and the feeding holes are uniformly arranged in the circumferential direction.

[0008] In this preferred embodiment, oxygen is injected through the inner tube and out of the oxygen inlet hole by the nozzle design, and solid oxides are injected through the annular cavity and out of the feed hole. By designing the feed hole, the ejection area is reduced compared to the ejection area of ​​the annular cavity.

[0009] Preferably, the bend in the conveying pipeline at the turning point is a gently transitioning curve.

[0010] This preferred solution uses a gently transitioning curved design for the elbow, which increases the radius of curvature at the elbow, thereby reducing the accumulation and blockage of solid oxides at the elbow.

[0011] Preferably, a vibrator is also provided inside the conveying pipeline. This preferred embodiment uses the vibrator to periodically vibrate the conveying pipeline, thereby reducing the occurrence of solid oxide blockage within the pipeline.

[0012] Preferably, the oxygen pipe is equipped with a flow meter and a regulating valve, and the delivery pipeline is equipped with a regulating valve.

[0013] In this preferred embodiment, the flow meter and regulating valve on the oxygen pipe facilitate monitoring and regulating the oxygen intake, and the regulating valve on the delivery pipeline also facilitates regulating the amount of solid oxide used.

[0014] Preferably, the end of the gun body away from the gun head is provided with a feed connector including a large tube that is threaded to an outer tube and a small tube that is threaded to an inner tube. The other end of the small tube is inclined upward and extends to the outside of the large tube in a sealed manner. The other end of the large tube is connected to the conveying pipe, and the other end of the small tube is connected to the oxygen pipe.

[0015] This preferred solution achieves the connection between the gun body and the feed pipe and oxygen pipe by setting up a feed connector.

[0016] Preferably, the conveying pipe is connected to a discharge pipe extending radially upward, the top end of the discharge pipe is connected to the discharge port of the screw feeder, and the conveying pipe is also equipped with a blower located behind the discharge pipe and blowing gas to the oxygen lance.

[0017] In this preferred embodiment, the solid oxide from the screw feeder enters the conveying pipeline through the discharge pipe, and is then blown by a blower.

[0018] The beneficial effects of this utility model are as follows: Solid oxides in the silo are conveyed by a screw feeder. By adjusting the conveying speed of the screw feeder, the amount of solid oxides conveyed is adjusted. Then, the gas in the gas supply pipe enters the conveying pipe and conveys the solid oxides to the annular cavity. The oxygen pipe conveys oxygen to the inner pipe and sprays oxygen and solid oxides into the molten iron. The screw feeder quantitatively conveys the solid oxides, thereby ensuring a quantitative supply of solid oxides and forming a complete oxygen and solid oxide supply system. By setting the bends as gently transitioning curves, the radius of curvature at the bends is increased, thereby reducing the accumulation and blockage of solid oxides at the bends. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the spearhead.

[0021] Figure 3 This is a schematic diagram of the oxygen inlet and feed inlet.

[0022] Figure 4 This is a schematic diagram of the feed connector;

[0023] As shown in the figure:

[0024] 1. Hopper, 2. Screw feeder, 3. Drop pipe, 4. Conveying pipe, 5. Oxygen lance, 6. Nozzle, 7. Feed connector, 51. Outer pipe, 52. Inner pipe, 53. Annular cavity, 61. Oxygen inlet, 62. Feed inlet, 71. Small pipe, 72. Large pipe. Detailed Implementation

[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0026] See attached document Figures 1-4 This utility model discloses a jetting system for solid oxide and oxygen jetting, including a silo 1 for holding solid oxide, a screw feeder 2 connected to the outlet of the silo 1, and an oxygen lance 5. The screw feeder is set on an inclined plate with an inclination angle of 8-12°, that is, the screw feeder 2 is inclined from top to bottom along the solid oxide conveying direction.

[0027] The oxygen lance 5 includes a lance body and a lance head 6. The lance body includes an outer tube 51 and an inner tube 52 located inside the outer tube 51. The inner tube 52 is connected to an oxygen pipe. An annular cavity 53 is formed between the outer tube 51 and the inner tube 52. The screw feeder 2 is connected to the annular cavity 53 through a conveying pipe 4. The conveying pipe 4 is also connected to a gas supply pipe that supplies gas to the annular cavity 53 and drives solid oxides to the oxygen lance 5.

[0028] The oxygen lance 5 also includes a lance head 6 located at the end of the lance body. The lance head 6 has an oxygen inlet hole 61 that communicates with the inner tube 52 and a plurality of feed holes 62 that communicate with the annular cavity 53. The feed holes 62 are evenly arranged circumferentially. The oxygen inlet hole 61 is a flared opening, and the feed holes 62 are inclined holes that slope from the inside to the outside.

[0029] The end of the gun body away from the gun head 6 is provided with a feed connector 7. The feed connector 7 includes a large tube 72 that is threaded to the outer tube 51 and a small tube 71 that is threaded to the inner tube 52. The other end of the small tube 71 is inclined upward and extends to the outside of the large tube 72 in a sealed manner. The other end of the large tube 72 is connected to the conveying pipe 4, and the other end of the small tube 71 is connected to the oxygen pipe.

[0030] The outer tube 51, inner tube 52, large tube 72, small tube 71, and oxygen inlet 61 are arranged along the same axis, and the annular cavity 53 is provided with a support rib to support the inner tube 52.

[0031] The bend in the delivery pipeline 4 is a gently sloping curve. A vibrator is also installed inside the delivery pipeline 4. A flow meter and a regulating valve are installed on the oxygen pipe, and the regulating valve is also installed on the delivery pipeline 4.

[0032] The conveying pipe 4 is connected to a discharge pipe 3 that extends radially upward. The top end of the discharge pipe 3 is connected to the discharge port of the screw feeder 2. The conveying pipe 4 is also equipped with a blower located behind the discharge pipe 3 that blows gas to the oxygen lance 5.

[0033] In use, the solid oxides in the hopper 1 are conveyed by the screw feeder 2. The conveying speed of the screw feeder 2 is adjusted to regulate the amount of solid oxides conveyed. After the solid oxides enter the conveying pipe 4, the conveying gas enters the gas delivery pipe through the gas supply pipe and the inclined hole, and carries the solid oxides into the large pipe 72 and the annular cavity 53, and is sprayed out from the feed pipe. The oxygen pipe delivers oxygen to the inner pipe 52 and sprays oxygen and solid oxides into the molten iron. The screw feeder 2 provides a quantitative conveying of solid oxides, thereby ensuring a quantitative supply of solid oxides and forming a complete oxygen and solid oxide supply system. The bends are designed with a smooth transition curve, which increases the radius of curvature at the bends, thereby reducing the accumulation and blockage of solid oxides at the bends.

[0034] By adjusting the intake of oxygen and solid oxides, it is possible to avoid excessive oxygen blowing when the initial temperature is high, which would lead to excessively high temperature control, which is detrimental to dephosphorization of the container or molten steel. Long-term soft blowing can also cause violent reactions in the molten steel in the middle and later stages, resulting in splashing, which prolongs the smelting cycle and has a significant impact on the entire production rhythm.

[0035] Meanwhile, by setting up bends and vibrators, the accumulation of solid oxides in the conveying pipe 4 is reduced, which would cause the spraying to be interrupted and seriously affect production efficiency.

[0036] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A system for the injection of solid oxide and oxygen gas, characterized in that: The oxygen lance (5) comprises a lance body, the lance body comprises an outer tube (51) and an inner tube (52) located in the outer tube (51), the inner tube (52) is connected with an oxygen pipe, an annular cavity (53) is formed between the outer tube (51) and the inner tube (52), the screw feeder (2) is communicated with the annular cavity (53) through a conveying pipe (4), and a gas feeding pipe for feeding gas to the annular cavity (53) and driving the solid oxidant to the oxygen lance (5) is further connected on the conveying pipe (4).

2. The solid oxide and oxygen gas injection system according to claim 1, characterized by: The oxygen lance (5) further comprises a lance head (6) located at the end of the lance body, the lance head (6) is provided with an oxygen inlet hole (61) communicated with the inner tube (52) and a plurality of feeding holes (62) communicated with the annular cavity (53), and the feeding holes (62) are uniformly arranged in the circumferential direction.

3. The solid oxide and oxygen gas injection system of claim 1, wherein: The elbow of the conveying pipe (4) at the turning position is a gentle transition curve.

4. The solid oxide and oxygen gas injection system of claim 1, wherein: The conveying pipe (4) is further provided with a vibrator.

5. The solid oxide and oxygen gas injection system of claim 1, wherein: The oxygen pipe is provided with a flow meter and an adjusting valve, and the conveying pipe (4) is provided with an adjusting valve.

6. The solid oxide and oxygen gas injection system of claim 2, wherein: The end of the lance body away from the lance head (6) is provided with a feeding connector (7), the feeding connector (7) comprises a large pipe (72) threadedly connected with the outer tube (51) and a small pipe (71) threadedly connected with the inner tube (52), the other end of the small pipe (71) is inclined upward and sealingly extends to the outside of the large pipe (72), the other end of the large pipe (72) is connected with the conveying pipe (4), and the other end of the small pipe (71) is connected with the oxygen pipe.

7. The solid oxide and oxygen gas injection system of claim 1, wherein: The conveying pipe (4) is connected with a material falling pipe (3) extending upward along the radial direction thereof, the top end of the material falling pipe (3) is communicated with the discharge port of the screw feeder (2), and the conveying pipe (4) is further provided with a fan located behind the material falling pipe (3) and blowing conveying gas to the oxygen lance (5).

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