Refining furnace liquid steel deoxidizing structure

Abstract

The utility model discloses a refining furnace liquid steel deoxidation structure, the utility model relates to refining furnace liquid steel deoxidation technical field, the utility model discloses a stirring drum, first connecting hole is set up in the upper pass -through of stirring drum, and the first connecting hole of lower extreme installs the first rotating shaft, the first rotating shaft top installs the stirring shaft, two groups of symmetrical stirring vane are installed on the stirring shaft, the spiral piece is installed on the stirring shaft, and the stirring drum bottom end is installed with three first support, the utility model discloses the collaborative structure of stirring and spiral piece conveying, and the defect of traditional design is effectively solved. The spiral piece on the shaft can continuously convey the liquid steel at the bottom end of the stirring drum and the deoxidizer upward while the stirring shaft rotates to drive the liquid steel stirring, breaks the deposition state of the bottom end material, makes the originally detained deoxidizer actively enter the upper liquid steel, and fully contacts with oxygen, greatly improves the reaction efficiency, avoids the waste of deoxidizer and the partial oxygen residue.

Description

Technical Field

[0001] This utility model relates to the field of steel deoxidation technology in refining furnaces, and in particular to a structure for steel deoxidation in refining furnaces. Background Technology

[0002] In the deoxidation process of molten steel in a refining furnace, to ensure the deoxidizer reacts fully with the oxygen in the molten steel, a stirring structure is needed to drive the flow of the molten steel and evenly disperse the deoxidizer. In traditional deoxidation structures, stirring often relies on a stirring shaft to rotate the blades, achieving horizontal or localized circulation of the molten steel. The deoxidizer is usually added from the surface or middle of the molten steel—some of the deoxidizer diffuses with the flow of the molten steel, but due to the density of the molten steel itself, a certain amount of deoxidizer and unreacted molten steel still deposits at the bottom of the stirring drum. Existing designs do not specifically treat the material at the bottom, relying only on the natural convection of conventional stirring to drive the material upward. The core idea is to complete deoxidation through "stirring diffusion," without combining "stirring" with "active conveying of bottom material," assuming that conventional stirring can cover the mixing needs of the entire drum of molten steel and deoxidizer.

[0003] Current deoxidation structures lack an active conveying mechanism for bottom materials. At the bottom of the mixing drum, molten steel and deoxidizer tend to deposit due to poor fluidity. These deposited deoxidizers struggle to contact oxygen in the upper molten steel, leading to incomplete reaction, wasting deoxidizer, and causing localized excessive oxygen levels in the molten steel. Furthermore, the prolonged retention of unreacted molten steel at the bottom creates compositional differences compared to the reacted steel, resulting in poor deoxidation uniformity and a higher risk of excessive oxide inclusions later. In addition, to address bottom deposition, some processes require extended mixing time or increased mixing intensity, increasing energy consumption and potentially causing the molten steel to absorb air due to excessive mixing, thus affecting deoxidation quality. These additional operational adjustments also prolong the refining cycle, making them less suitable for continuous production.

[0004] Therefore, a new deoxidation structure for molten steel in refining furnaces is proposed to solve the above problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this invention is to provide a deoxidation structure for molten steel in refining furnaces. This addresses the problem that current deoxidation structures, due to the lack of an active conveying mechanism for bottom materials, often result in sedimentation of the molten steel and deoxidizer at the bottom of the stirring drum due to poor fluidity. This sedimented deoxidizer has difficulty contacting oxygen in the upper molten steel, leading to incomplete reaction, wasting deoxidizer, and causing localized excessive oxygen levels in the molten steel. Furthermore, the prolonged retention of unreacted molten steel at the bottom creates compositional differences with the reacted steel, resulting in poor deoxidation uniformity and a higher risk of excessive oxide inclusions later. In addition, to solve the bottom sedimentation problem, some processes require extended stirring time or increased stirring intensity, which not only increases energy consumption but may also cause the molten steel to absorb air due to excessive stirring, negatively impacting deoxidation quality. Moreover, these additional operational adjustments prolong the refining cycle and result in limited adaptability to continuous production.

[0007] 2. Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] This utility model is a deoxidation structure for molten steel in a refining furnace, including a stirring cylinder. A first connecting hole is opened through the stirring cylinder, and a first rotating shaft is installed in the first connecting hole at the lower end. A stirring shaft is installed at the top of the first rotating shaft. Two sets of symmetrical stirring blades are installed on the stirring shaft, and a spiral blade is installed on the stirring shaft. Three first supports are installed at the bottom of the stirring cylinder.

[0010] Furthermore, a motor is installed at the bottom of the first rotating shaft, and a mounting base is installed on one side of the motor. Three second supports are installed at the end of the mounting base near the stirring drum. The end of any second support away from the mounting base is connected to the bottom of the stirring drum. This design allows the motor to be started, and the motor drives the stirring shaft to rotate through the first rotating shaft. When the stirring shaft rotates, it can drive the stirring blades and spiral blades to rotate.

[0011] Furthermore, a second rotating shaft is installed at the end of the stirring shaft away from the first rotating shaft, and a bearing is installed at the other end of the second rotating shaft. The second rotating shaft passes through the first connecting hole at the upper end, and the end of the bearing near the second rotating shaft is connected to the top of the stirring cylinder. This design can reduce the wear generated by the stirring shaft during rotation and increase the service life of the device.

[0012] Furthermore, two symmetrical crossbars are installed on the stirring shaft, and a vertical bar is installed at the end of any pair of symmetrical crossbars away from the stirring shaft. This design can scrape off the residual oxidant and molten steel on the inner wall of the stirring drum when it is rotated by the stirring shaft.

[0013] Furthermore, multiple steel wires are installed at the end of any of the vertical rods furthest from the stirring shaft, a design that improves the cleaning effect.

[0014] Furthermore, the upper and lower ends of any set of crossbars are in contact with the upper and lower ends of the mixing drum, the end of any vertical bar away from the mixing shaft is designed in an arc shape, and the end of any vertical bar away from the mixing shaft is in contact with the inner wall of the mixing drum.

[0015] Furthermore, a second connection hole is provided at the upper end of the mixing drum, and a feed pipe is installed in the second connection hole. A first valve is installed on the feed pipe. A third connection hole is provided at the bottom end of the mixing drum, and a discharge pipe is installed in the third connection hole. A second valve is installed on the discharge pipe. This design facilitates the feeding and unloading of the device.

[0016] 3. Beneficial effects

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] This invention effectively solves the shortcomings of traditional designs through a synergistic structure of stirring and spiral conveying. While the rotating stirring shaft agitates the molten steel, the spiral blades on the shaft continuously convey the molten steel and deoxidizer from the bottom of the mixing drum upwards, breaking the sedimentation of the material at the bottom. This allows the previously stagnant deoxidizer to actively enter the upper layer of molten steel, fully contacting oxygen and significantly improving reaction efficiency, avoiding deoxidizer waste and localized oxygen residue. Simultaneously, the upward conveying process further enhances the overall convection of the molten steel, ensuring uniform distribution of the deoxidizer throughout the drum, reducing oxide inclusions caused by uneven mixing, and improving the uniformity of deoxidation. Furthermore, this structure eliminates the need for additional conveying equipment; the integrated design of the stirring shaft and spiral blades simultaneously achieves stirring and conveying functions, simplifying the overall complexity of the deoxidation structure, reducing energy consumption, and eliminating the need for extended stirring time. This adapts to the continuous production requirements of refining furnaces, indirectly improving production efficiency.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram showing the installation configuration of this utility model;

[0022] Figure 2 This is a cross-sectional view of the stirring cylinder of this utility model;

[0023] Figure 3 For the present utility model Figure 1 Enlarged view of the structure at point A;

[0024] Figure 4 This is a structural diagram of the stirring shaft of this utility model;

[0025] Figure 5 This is a structural diagram of the horizontal and vertical bars of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 110. Stirring drum; 111. First connecting hole; 112. Second connecting hole; 113. Third connecting hole; 114. First support; 120. Feed pipe; 121. First valve; 130. Discharge pipe; 131. Second valve; 210. First rotating shaft; 211. Stirring shaft; 212. Second rotating shaft; 213. Bearing; 220. Stirring blade; 221. Spiral blade; 230. Motor; 310. Horizontal bar; 320. Vertical bar; 140. Mounting base; 141. Second support. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0032] Please see Figure 1-5As shown, this embodiment is a deoxidation structure for molten steel in a refining furnace, including a stirring drum 110. A first connecting hole 111 is provided through the stirring drum 110. A first rotating shaft 210 is installed in the lower end of the first connecting hole 111. A stirring shaft 211 is installed at the top of the first rotating shaft 210. Two sets of symmetrical stirring blades 220 are installed on the stirring shaft 211. Spiral blades 221 are also installed on the stirring shaft 211. Three first supports 114 are installed at the bottom of the stirring drum 110. A motor 230 is installed at the bottom of the first rotating shaft 210. A mounting base 140 is installed on one side of the motor 230. Three second supports 141 are installed at the end of the mounting base 140 closest to the stirring drum 110. The end of any second support 141 furthest from the mounting base 140 is connected to the bottom of the stirring drum 110. A second rotating shaft 212 is installed at the end of the stirring shaft 211 away from the first rotating shaft 210. A bearing 213 is installed at the other end of the second rotating shaft 212. The second rotating shaft 212 passes through the upper first connecting hole 111. The end of the bearing 213 near the second rotating shaft 212 is connected to the top of the stirring drum 110. A second connecting hole 112 is opened at the upper end of the stirring drum 110. A feed pipe 120 is installed in the second connecting hole 112. A first valve 121 is installed on the feed pipe 120. A third connecting hole 113 is opened at the bottom end of the stirring drum 110. A discharge pipe 130 is installed in the third connecting hole 113. A second valve 131 is installed on the discharge pipe 130.

[0033] Working principle: During operation, the first valve 121 is opened first, and then the furnace liquid and deoxidizer are fed into the mixing drum 110 through the feed pipe 120. Then, the motor 230 is started. The motor 230 drives the stirring shaft 211 to rotate through the first rotating shaft 210. When the stirring shaft 211 rotates, it drives the stirring blades 220 and the spiral blades 221 to rotate. When the stirring blades 220 rotate, they drive the furnace liquid and deoxidizer to mix, so that the oxidizer can react better with the furnace liquid. In addition, the spiral blades 221 are designed to transport the furnace liquid and deoxidizer at the bottom upwards when rotating, avoiding the furnace liquid deoxidation failure caused by deoxidizer precipitation and other phenomena.

[0034] Two symmetrical crossbars 310 are mounted on the stirring shaft 211. A vertical rod 320 is mounted on the end of each set of symmetrical crossbars 310 furthest from the stirring shaft 211. Multiple steel wires are attached to the end of each vertical rod 320 furthest from the stirring shaft 211. Both the upper and lower ends of each set of crossbars 310 are in contact with the upper and lower ends of the stirring drum 110. The end of each vertical rod 320 furthest from the stirring shaft 211 is arc-shaped and is in contact with the inner wall of the stirring drum 110.

[0035] Working principle: When the horizontal bar 310 and the vertical bar 320 are rotated by the stirring shaft 211, the horizontal bar 310 scrapes down the sediment at the upper and lower ends of the inner wall of the stirring drum 110, while the two vertical bars 320 scrape down the sediment around the inner wall of the stirring drum.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A deoxidation structure for molten steel in a refining furnace, characterized in that, include: A stirring drum (110) is provided with a first connecting hole (111) through it. A first rotating shaft (210) is installed in the first connecting hole (111) at the lower end. A stirring shaft (211) is installed at the top of the first rotating shaft (210). Two sets of symmetrical stirring blades (220) are installed on the stirring shaft (211). Spiral blades (221) are installed on the stirring shaft (211). Three first supports (114) are installed at the bottom of the stirring drum (110).

2. The deoxidation structure for molten steel in a refining furnace according to claim 1, characterized in that, A motor (230) is installed at the bottom of the first rotating shaft (210). A mounting base (140) is installed on one side of the motor (230). Three second supports (141) are installed at the end of the mounting base (140) near the stirring drum (110). The end of any second support (141) away from the mounting base (140) is connected to the bottom of the stirring drum (110).

3. The deoxidation structure for molten steel in a refining furnace according to claim 1, characterized in that, The stirring shaft (211) is equipped with a second rotating shaft (212) at one end away from the first rotating shaft (210). A bearing (213) is installed at the other end of the second rotating shaft (212). The second rotating shaft (212) passes through the first connecting hole (111) at the upper end. The bearing (213) is connected to the top of the stirring cylinder (110) at one end close to the second rotating shaft (212).

4. The deoxidation structure for molten steel in a refining furnace according to claim 1, characterized in that, Two symmetrical crossbars (310) are installed on the stirring shaft (211), and a vertical bar (320) is installed at the end of any pair of symmetrical crossbars (310) away from the stirring shaft (211).

5. The deoxidation structure for molten steel in a refining furnace according to claim 4, characterized in that, Multiple steel wires are installed at the end of any of the vertical rods (320) away from the stirring shaft (211).

6. The deoxidation structure for molten steel in a refining furnace according to claim 4, characterized in that, Both ends of any set of horizontal bars (310) are in contact with both ends of the stirring cylinder (110), and the end of any vertical bar (320) away from the stirring shaft (211) is designed in an arc shape, and the end of any vertical bar (320) away from the stirring shaft (211) is in contact with the inner wall of the stirring cylinder (110).

7. The deoxidation structure for molten steel in a refining furnace according to claim 1, characterized in that, The upper end of the mixing drum (110) is provided with a second connecting hole (112), a feed pipe (120) is installed in the second connecting hole (112), a first valve (121) is installed on the feed pipe (120), a third connecting hole (113) is provided at the bottom end of the mixing drum (110), a discharge pipe (130) is installed in the third connecting hole (113), and a second valve (131) is installed on the discharge pipe (130).

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