A deoxidizing and desulfurizing device for steelmaking

Abstract

The utility model relates to the technical field of steelmaking, and the utility model provides a kind of deoxidizing and desulfurization device for steelmaking, it includes ladle and is used for containing cavity for containing molten steel;Injection subassembly is set above ladle, and injection subassembly has injection gun, and injection gun is used to spray deoxidizing and desulfurization composite powder into containing cavity;Stirring part is set in containing cavity bottom, and stirring part has gas outlet, and gas outlet is communicated with gas source, and gas is passed into containing cavity for stirring. By the above technical scheme, molten steel can be in full contact with deoxidizing and desulfurization composite powder, and the efficiency of molten steel deoxidizing and desulfurization is improved.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking technology, specifically to a deoxidation and desulfurization device for steelmaking. Background Technology

[0002] With the development of modern industry, the quality requirements for steel are becoming increasingly stringent. Ladle refining is currently the most widely used ladle refining technology and has become an indispensable process for producing high-quality steel. Existing LF refining processes generally involve first adding aluminum for strong deoxidation, then slag formation for desulfurization, adding alloys for fine-tuning the composition, and finally feeding calcium wire for inclusion modification. Argon blowing and stirring are performed throughout the refining process to facilitate the flotation and removal of inclusions. However, when deoxidizing and desulfurizing agents are added to molten steel, they usually melt and react on the surface, resulting in insufficient contact between the bottom molten steel and the agents, leading to low deoxidation and desulfurization efficiency. Therefore, there is an urgent need for a device that can effectively solve the above problems, ensuring sufficient contact between molten steel and the deoxidizing and desulfurizing reactants to improve deoxidation and desulfurization efficiency. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a deoxidation and desulfurization device for steelmaking, which solves the technical problem of insufficient contact between deoxidation and desulfurization reactants and molten steel in related technologies.

[0004] According to one aspect, at least one embodiment of the present invention provides a deoxidation and desulfurization device for steelmaking, comprising: A ladle has a cavity for holding molten steel. A blowing assembly is disposed above the ladle, the blowing assembly having a blowing gun for blowing deoxidation and desulfurization composite powder into the receiving cavity; A stirring element is disposed at the bottom of the receiving cavity. The stirring element has an air outlet that is connected to an air source to introduce gas into the receiving cavity for stirring.

[0005] For example, in at least one embodiment of this utility model, a deoxidation and desulfurization device for steelmaking is provided, wherein the injection assembly further includes: The delivery pipe is connected to the blow gun; An air supply valve is installed on the delivery pipe, and the air supply valve is used to connect the delivery pipe to the air source.

[0006] For example, in at least one embodiment of this utility model, a deoxidation and desulfurization device for steelmaking is provided, wherein the injection assembly further includes: Storage tanks; A rotary feed valve is used to connect the storage tank and the conveying pipe, and the air replenishment valve is located between the rotary feed valve and the blow gun.

[0007] For example, at least one embodiment of this utility model provides a deoxidation and desulfurization device for steelmaking, wherein the blowing gun includes: The gun body is mounted on the delivery pipe; The gun head has several parts, which are spaced apart on the gun body, and the gun head, the gun body and the delivery pipe are connected in sequence.

[0008] For example, at least one embodiment of this utility model provides a deoxidation and desulfurization device for steelmaking, wherein the outlet axis of the nozzle is parallel to the axis of the receiving cavity.

[0009] For example, at least one embodiment of this utility model provides a deoxidation and desulfurization device for steelmaking, wherein the stirring component includes: There are several breathable bricks, all of which are located at the bottom of the receiving cavity, and the air outlet is located on the breathable brick.

[0010] For example, at least one embodiment of this utility model provides a deoxidation and desulfurization device for steelmaking, wherein the permeable brick is annular, a plurality of the permeable bricks form a ring shape, the permeable brick has an air channel, the air channel is connected to the air outlet, and the air channels of the plurality of permeable bricks are connected sequentially.

[0011] For example, in at least one embodiment of this utility model, a deoxidation and desulfurization device for steelmaking is provided, wherein the stirring component further includes: A gas supply pipeline passes through the steel ladle and is connected to the gas duct; An adjusting device is installed on the gas supply pipeline. The adjusting device is capable of adjusting the amount of gas entering the gas pipeline. The adjusting device is located outside the ladle.

[0012] The beneficial effects of the embodiments of this utility model are as follows: In this invention, molten steel is placed into the receiving cavity of a ladle, and the spraying assembly is activated. The spraying assembly sprays deoxidizing and desulfurizing composite powder into the receiving cavity, achieving a certain speed so that the powder penetrates into the molten steel. Simultaneously, a gas source is connected to the agitator, and gas enters the receiving cavity from the bottom of the molten steel, causing it to tumble and achieve agitation. The gas introduced is typically argon. The agitator tumbles the molten steel, uniformly mixing the deoxidizing and desulfurizing composite powder located at the top, allowing for sufficient contact and reaction between the molten steel and the powder. Furthermore, the spraying assembly ensures the powder penetrates into the molten steel, preventing it from floating on the surface and resulting in more uniform mixing. This ensures sufficient contact between the molten steel and the deoxidizing and desulfurizing reactants, improving deoxidation and desulfurization efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a deoxidation and desulfurization device for steelmaking in one embodiment of the present invention; Figure 2 This utility model Figure 1 Enlarged structural diagram at point B; Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a top view of a deoxidation and desulfurization device for steelmaking according to this utility model; Figure 5 This is a cross-sectional view of the permeable brick in this utility model; Figure 6 This is a bottom view of a deoxidation and desulfurization device for steelmaking according to this utility model; Figure 7 This utility model Figure 6 Enlarged structural diagram at point C.

[0015] In the diagram: 1. Steel ladle; 101. Receiving cavity; 2. Spraying assembly; 201. Spraying gun; 2011. Gun body; 2012. Gun head; 202. Conveying pipe; 203. Air supply valve; 204. Storage tank; 205. Rotary feed valve; 3. Mixing component; 301. Air outlet; 302. Permeable brick; 3021. Air passage; 303. Air supply pipe; 304. Adjusting device. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0017] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-7 As shown, it illustrates a deoxidation and desulfurization device for steelmaking in one embodiment of the present invention, including a ladle 1 having a receiving cavity 101 for holding molten steel; a blowing assembly 2 disposed above the ladle 1, the blowing assembly 2 having a blowing gun 201 for blowing deoxidation and desulfurization composite powder into the receiving cavity 101; and a stirring component 3 disposed at the bottom of the receiving cavity 101, the stirring component 3 having a gas outlet 301 connected to a gas source to introduce gas into the receiving cavity 101 for stirring.

[0023] In this utility model, in order to solve the technical problem of insufficient contact between deoxidation and desulfurization reactants and molten steel in related technologies, a spraying component 2 is provided above the ladle 1. The spraying component can spray out the deoxidation and desulfurization composite powder. The sprayed deoxidation and desulfurization composite powder has a certain initial velocity and can reach the interior of the molten steel. Furthermore, a stirring component 3 is provided at the bottom of the receiving cavity 101 of the ladle 1. The stirring component 3 has an air outlet 301 that is connected to an external air source. By supplying gas into the receiving cavity 101, the molten steel is made to tumble, thereby achieving the effect of stirring.

[0024] Specifically, molten steel is placed into the receiving cavity 101 of the ladle 1, and the spraying assembly 2 is activated. The spraying assembly 2 sprays the deoxidizing and desulfurizing composite powder into the receiving cavity 101, achieving a certain speed so that the powder can be sprayed into the molten steel. The spraying assembly 2 consists of several sets. Simultaneously, the agitator 3 is connected to a gas source, and gas enters the receiving cavity 101 from the bottom of the molten steel, causing the steel to tumble and achieve agitation. The gas introduced is typically argon. The agitator 3 tumbles the molten steel, uniformly mixing the deoxidizing and desulfurizing composite powder located at the top, allowing for sufficient contact and reaction between the molten steel and the powder. Furthermore, the spraying assembly 2 ensures the deoxidizing and desulfurizing composite powder enters the interior of the molten steel, preventing it from floating on the surface and ensuring more uniform mixing by the agitator 3. This ensures sufficient contact between the molten steel and the deoxidizing and desulfurizing reactants, improving the efficiency of deoxidation and desulfurization.

[0025] like Figure 2 As shown, the blowing assembly 2 also includes a delivery pipe 202 connected to the blowing gun 201; an air supply valve 203 is installed on the delivery pipe 202 and is used to connect the delivery pipe 202 to the air source.

[0026] In this embodiment, in order to meet the requirements of spraying out the deoxidation and desulfurization composite powder, a conveying pipe 202 is provided on the spray gun 201 for conveying the deoxidation and desulfurization composite powder. A gas supply valve 203 is also provided on the conveying pipe 202. The gas supply valve 203 is connected to a gas source and delivers positive pressure gas into the conveying pipe 202 to accelerate the outward spraying of the deoxidation and desulfurization composite powder. It should be noted that the gas source connected to the gas supply valve 203 and the gas source connected to the agitator 3 are two different gas sources. The gas source of the gas supply valve 203 can be an inert gas or other gas that does not react with molten steel and affect the quality of molten steel.

[0027] like Figures 1-2 As shown, the spray assembly 2 also includes a storage tank 204; a rotary feed valve 205 is used to connect the storage tank 204 and the conveying pipe 202, and an air replenishment valve 203 is located between the rotary feed valve 205 and the spray gun 201.

[0028] In this embodiment, the storage tank 204 and the conveying pipe 202 are connected. The storage tank 204 is used to store the deoxidation and desulfurization composite powder. The rotary feed valve 205 conveys the deoxidation and desulfurization composite powder into the subsequent pipeline through its internal components. The air replenishment valve 203 is located between the rotary feed valve 205 and the blow gun 201.

[0029] Specifically, a certain amount of deoxidizing and desulfurizing composite powder is placed in storage tank 204. The rotary feed valve 205 is used to transport the deoxidizing and desulfurizing composite powder to the conveying pipe 202. At the same time, the gas supply valve 203 introduces gas at a certain pressure. Driven by the gas, the deoxidizing and desulfurizing composite powder reaches a certain speed and is sprayed from the blow gun 201 into the ladle 1 receiving cavity 101 to react with the molten steel.

[0030] like Figure 3 As shown, the spray gun 201 includes a gun body 2011, which is disposed on the delivery pipe 202; there are several gun heads 2012, which are disposed at intervals on the gun body 2011, and the gun heads 2012, gun body 2011 and delivery pipe 202 are connected in sequence; wherein, the outlet axis of the gun head 2012 is parallel to the axis of the receiving cavity 101.

[0031] In this embodiment, the spray gun 201 includes a gun body 2011 and multiple gun heads 2012. The gun body 2011 is connected to the delivery pipe 202, and the gun heads 2012 are connected to the gun body 2011. The gun heads 2012 are evenly distributed on the gun body 2011. The deoxidation and desulfurization composite powder is sprayed into the receiving cavity 101 through the gun heads 2012. The arrangement of the gun heads 2012 makes the deoxidation and desulfurization composite powder more evenly sprayed into the receiving cavity 101 of the ladle 1, increasing the contact area between the molten steel and the deoxidation and desulfurization composite powder, making the contact more sufficient, and further improving the deoxidation and desulfurization efficiency.

[0032] like Figures 4-5 As shown, the stirring component 3 includes several permeable bricks 302, all of which are disposed at the bottom of the receiving cavity 101. The air outlet 301 is located on the permeable brick 302. The permeable brick 302 is annular, and several permeable bricks 302 form a ring shape. The permeable brick 302 has an air channel 3021, which is connected to the air outlet 301. The air channels 3021 of several permeable bricks 302 are connected in sequence.

[0033] In this embodiment, in order to meet the requirement of uniform mixing, a plurality of permeable bricks 302 are provided at the bottom of the receiving cavity 101. The permeable bricks 302 have vent holes 301 that communicate with the outside of the ladle 1. The plurality of permeable bricks 302 can be arranged in a ring and coaxially arranged with the ladle 1. The ladle 1 also has interconnected air channels 3021 inside to make the gas introduced more uniform. The vent holes 301 and air channels 3021 of the permeable bricks 302 are sealed with fireproof materials to prevent the molten steel from damaging the permeable bricks 302.

[0034] like Figures 6-7 As shown, the agitator 3 also includes an air supply pipe 303 that passes through the ladle 1 and is connected to the air passage 3021; ​​the regulating device 304 is installed on the air supply pipe 303 and can regulate the amount of gas entering the air passage 3021. The regulating device 304 is located outside the ladle 1.

[0035] In this embodiment, to introduce argon gas into the ladle 1, a gas supply pipe 303 is installed at the bottom of the ladle 1. The gas supply pipe 303 penetrates the bottom wall of the ladle 1 and communicates with the permeable brick 302. Furthermore, an adjusting device 304 is installed on the gas supply pipe 303 to control the amount of argon gas introduced, preventing excessive argon gas from lowering the molten steel temperature and affecting its quality. The stirring component 3 and the spraying assembly work together to ensure that the molten steel can fully contact the deoxidation and desulfurization reactants, improving the efficiency of deoxidation and desulfurization.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A deoxidation and desulfurization device for steelmaking, characterized in that, include: The ladle (1) has a receiving cavity (101) for holding molten steel. A blowing assembly (2) is disposed above the ladle (1). The blowing assembly (2) has a blowing gun (201) for blowing deoxidation and desulfurization composite powder into the receiving cavity (101). A stirring element (3) is disposed at the bottom of the receiving cavity (101). The stirring element (3) has an air outlet (301) which is connected to an air source to introduce gas into the receiving cavity (101) for stirring.

2. The deoxidation and desulfurization device for steelmaking according to claim 1, characterized in that, The blowing assembly (2) also includes: The delivery pipe (202) is connected to the blow gun (201); An air supply valve (203) is installed on the delivery pipe (202) and is used to connect the delivery pipe (202) with the air source.

3. The deoxidation and desulfurization device for steelmaking according to claim 2, characterized in that, The blowing assembly (2) also includes: Storage tank (204); A rotary feed valve (205) is used to connect the storage tank (204) and the conveying pipe (202), and the air replenishment valve (203) is located between the rotary feed valve (205) and the blow gun (201).

4. The deoxidation and desulfurization device for steelmaking according to claim 2, characterized in that, The spray gun (201) includes: The gun body (2011) is mounted on the delivery pipe (202); There are several gun heads (2012), which are spaced apart on the gun body (2011). The gun heads (2012), the gun body (2011) and the delivery pipe (202) are connected in sequence.

5. A deoxidizing and desulfurizing device for steelmaking according to claim 4, characterized in that, The outlet axis of the gun head (2012) is parallel to the axis of the receiving cavity (101).

6. The deoxidation and desulfurization device for steelmaking according to claim 1, characterized in that, The stirring component (3) includes: There are several breathable bricks (302), all of which are disposed at the bottom of the receiving cavity (101), and the air outlet (301) is located on the breathable brick (302).

7. A deoxidizing and desulfurizing device for steelmaking according to claim 6, characterized in that, The breathable brick (302) is ring-shaped, and several breathable bricks (302) form a ring shape. The breathable brick (302) has an air channel (3021), which is connected to the air outlet (301). The air channels (3021) of several breathable bricks (302) are connected in sequence.

8. A deoxidizing and desulfurizing device for steelmaking according to claim 7, characterized in that, The stirring component (3) also includes: A gas supply pipe (303) passes through the steel ladle (1) and is connected to the gas duct (3021); An adjusting device (304) is provided on the gas supply pipe (303). The adjusting device (304) is capable of adjusting the amount of gas entering the gas passage (3021). The adjusting device (304) is located outside the ladle (1).

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