High-efficiency desulfurization rotary stirring spray gun

Abstract

The present application relates to a kind of high-efficiency desulfurization rotary stirring spray gun, including connecting flange, connecting bolt, positioning pin, column section, stirring section, spray section and spray pipe;The upper and lower end faces of the connecting flange are coaxially fixedly connected with baffle respectively;The upper end surface of the column section is coaxially fixedly connected with the baffle of the lower end surface of the connecting flange by connecting bolt and positioning pin;The stirring section is coaxially fixedly connected at the lower end of the column section, and the outer circumferential end surface is circumferentially distributed with vertical stirring paddle;The spray section is coaxially fixedly connected at the lower end of the stirring section;The spray pipe is vertically arranged between the inside of the connecting flange and the spray section;The upper and lower ends of the spray pipe are desulfurizer inlet and desulfurizer spray port respectively;The surface of the baffle of the upper end surface of the connecting flange is provided with air outlet hole.The present application first designs the uplink angle of the blade bottom surface along the rotation direction as 0 < δ ≤ 20 °, innovatively changes the movement track of desulfurizer, can improve the efficiency of desulfurization and the utilization rate of desulfurizer, to improve the desulfurization environment.

Description

Technical Field

[0001] This invention relates to the field of desulfurization technology in the metallurgical industry, and in particular to a high-efficiency desulfurization rotary stirring spray gun. Background Technology

[0002] Currently, there are two main desulfurization methods commonly used in the metallurgical industry: the KR method and the injection method.

[0003] The KR method is a desulfurization method for molten iron using mechanical stirring. When desulfurizing molten iron in a ladle, a desulfurizing agent is added to the surface of the ladle, and the agent is thoroughly mixed and reacted with the molten iron using a stirring head. The advantages of this method are: (1) good desulfurization kinetics, which facilitates the use of inexpensive desulfurizing agents and results in better desulfurization; (2) mechanical stirring forces the desulfurizing agent to mix evenly with the molten iron; and (3) deep desulfurization can be achieved. However, due to the method of adding the desulfurizing agent in the KR method, the disadvantages and deficiencies of this method are: (1) because the desulfurizing agent in KR desulfurization is added from the ladle... (1) When the desulfurizer is added to the surface of the water, the high temperature gas on the surface of the molten iron will cause some of the added desulfurizer to diffuse and float to the surface, resulting in a large amount of dust in the desulfurization workshop, a harsh working environment and affecting the life of the equipment; (2) In order to quickly spin the desulfurizer into the molten iron and mix and react with the molten iron in the ladle, a high-power high-speed stirring device must be used, which is expensive and complex and increases energy consumption; (3) The KR method spins the desulfurizer into the molten iron by mechanical stirring. The desulfurizer often clumps together, which means that the desulfurizer cannot be fully mixed with the molten iron and increases the amount of desulfurizer used.

[0004] The injection method uses a desulfurization gun to inject desulfurizing agent into the molten iron through a carrier gas. The carrier gas also acts as a stirrer, and the injection gas, desulfurizing agent, and molten iron are mixed together to achieve desulfurization. The advantages are (1) low equipment cost; (2) the desulfurizing agent can be easily injected into the molten iron without clumping. The disadvantages of the injection method are (1) poor kinetic conditions. In order to fully mix the desulfurizing agent with the molten iron, a large gas pressure and gas volume are required. However, this also results in large bubbles that burst on the shallow surface of the molten iron, causing splashing. Furthermore, the desulfurizing agent in the bubbles fails to mix and react with the molten iron, resulting in significant waste. (2) large blind zone, making it difficult to achieve uniform desulfurization. (3) deep desulfurization cannot be achieved, the desulfurization time is long, and the desulfurization rate is low, about 1 / 4 of the KR method desulfurization rate.

[0005] With the rapid development of the social economy and the steel industry, the requirements for steel quality are becoming increasingly higher and more stringent. In recent years, with the gradual improvement of environmental standards and the country's requirements for cost reduction and efficiency improvement, the country's requirements for the environment and cost reduction and efficiency improvement of steel workshops have become increasingly stringent, which has made the shortcomings of the two desulfurization methods more prominent. Therefore, it has become an urgent task to solve the shortcomings and deficiencies of existing desulfurization technologies. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to provide a high-efficiency desulfurization rotary stirring spray gun, which can effectively improve the desulfurization efficiency and the utilization rate of the desulfurizing agent, thereby improving the desulfurization environment and solving the current problems in this field.

[0007] The technical solution adopted in this invention is as follows:

[0008] The present invention proposes a high-efficiency desulfurization rotary agitator spray gun, comprising a connecting flange, connecting bolts, positioning pins, a column section, an agitator section, a spraying section, and a spray pipe; the upper and lower end faces of the connecting flange are respectively coaxially fixed with baffles; the upper end face of the column section is coaxially fixed with the baffle on the lower end face of the connecting flange through connecting bolts and positioning pins; the agitator section is coaxially fixed to the lower end of the column section, and vertical agitators are evenly distributed around the outer circumference of the column section; the spraying section is coaxially fixed to the lower end of the agitator section; the spray pipe is vertically penetrating between the connecting flange and the spraying section; the upper and lower ends of the spray pipe are respectively the desulfurizing agent inlet and the desulfurizing agent spray port; the surface of the baffle on the upper end face of the connecting flange is provided with air outlets.

[0009] Furthermore, a refractory material layer is provided on the outer periphery of the lower region of the column section and the outer periphery of the stirring paddle, and multiple V-shaped steel bars are welded between the outer periphery of the column section and the refractory material layer, and between the outer periphery of the stirring paddle and the refractory material layer.

[0010] Furthermore, the radial projection of the stirring paddle is a spiral inverted trapezoid, and the forward tilt angle β of the iron-facing surface of the stirring paddle from bottom to top satisfies: 5≤β≤20°, the forward tilt angle γ of the back iron-facing surface from bottom to top satisfies: 0≤γ≤20°, the outward tilt angle α of the side surface from bottom to top satisfies: 2≤α≤4°, the upward tilt angle of the bottom surface from left to right is 0<δ≤20°, and the angle η between the upper surface and the horizontal plane satisfies: 0<η≤30°.

[0011] Furthermore, a lifting lug is fixedly connected to one side of the connecting flange.

[0012] Furthermore, the outer surface of the column section is provided with vertical reinforcing ribs.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The rotary stirring spray gun proposed in this invention includes a main body and a stirring paddle disposed on the outer circumference of the main body. A spray pipe runs through the interior of the main body, with a desulfurizing agent inlet and outlet at each end. This rotary stirring spray gun injects desulfurizing agent into the molten iron through the spray pipe inside the gun, comprehensively utilizing the advantages of mechanical stirring desulfurization and spray desulfurization. This ensures desulfurization efficiency, avoids dust generation, and improves the working environment. Furthermore, the design of the stirring paddle in this rotary spray gun enables the molten iron to form a vortex-like turbulent flow, effectively preventing the formation of large bubbles and improving the kinetic performance of molten iron desulfurization and the utilization rate of the desulfurizing agent. Simultaneously, the design of the angle of the stirring paddle's facing and bottom surfaces effectively creates a spiral-shaped annular flow of molten iron in the ladle, extending the travel distance and time for the desulfurizing agent to rise, further improving the kinetic performance of molten iron desulfurization and the utilization rate of the desulfurizing agent. Therefore, the high-efficiency desulfurization rotary stirring spray gun proposed in this invention can improve the desulfurization efficiency and the utilization rate of the desulfurizing agent, improve the desulfurization environment, and effectively solve the problems existing in this field at present. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present invention;

[0016] Figure 2 for Figure 1 Sectional view of AA;

[0017] Figure 3 for Figure 1 View from the center F direction;

[0018] Figure 4 for Figure 1 A cross-sectional view of BB.

[0019] The attached diagrams are labeled as follows: 1-Connecting flange; 2-Lifting lug; 3-Connecting bolt; 4-Upper baffle; 5-Lower baffle; 6-Reinforcing rib; 7-Agitator; 8-Purge section; 9-Desulfurizing agent inlet; 10-Purge pipe; 11-Column section; 12-Refractory material layer; 13-V-shaped steel bar; 14-Desulfurizing agent injection port; 15-Air outlet; 16-Positioning pin. Detailed Implementation

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

[0021] It should be noted that in the description of this invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not mean that the device or element must have a specific orientation, or be constructed and operated in a specific orientation.

[0022] See appendix Figure 1-4 This invention provides a specific structure of an embodiment of a high-efficiency desulfurization rotary agitator spray gun proposed in this invention. This invention divides a traditional one-piece spray gun into two parts: a flange connection section and an upper and lower agitator spray section. Specifically, the spray gun includes a connecting flange 1, connecting bolts 3, a spray section 8, a spray pipe 10, a column section 11, a positioning pin 16, and an agitator section.

[0023] The upper and lower end faces of the connecting flange 1 are coaxially fixed with an upper baffle 4 and a lower baffle 5, respectively; a lifting lug 2 is fixedly connected to one side of the connecting flange 1; the column section 11 is a hollow tube, and a vertical reinforcing rib 6 is provided on its outer surface. The upper end face of the column section 11 is coaxially fixed with the lower baffle 5 of the connecting flange 1 through connecting bolts 3 and positioning pins 16; the stirring section is coaxially fixed to the lower end of the column section 11, and vertical stirring paddles 7 are evenly distributed on the circumference of the lower outer circumference end face of the stirring section; the blowing section 8 is coaxially fixed to the lower end of the stirring section; the blowing pipe 10 is vertically inserted between the connecting flange 1 and the blowing section 8; the upper and lower ends of the blowing pipe 10 are respectively the desulfurizing agent inlet 9 and the desulfurizing agent blowing port 14; an air outlet 15 is provided on the surface of the upper baffle 4 of the connecting flange 1.

[0024] Among them, such as Figure 2 As shown, in this embodiment, the outer periphery of the lower region of the column section 11 and the outer periphery of the stirring paddle 7 are both provided with a refractory material layer 12, and multiple V-shaped steel bars 13 are welded between the outer periphery of the column section 11 and the refractory material layer 12, and between the outer periphery of the stirring paddle 7 and the refractory material layer 12.

[0025] The radial projection of the agitator 7 is a spiral inverted trapezoid. The forward tilt angle β of the agitator 7 facing the iron from bottom to top satisfies: 5 ≤ β ≤ 20°; the forward tilt angle γ of the back iron from bottom to top satisfies: 0 ≤ γ ≤ 20°; the outward tilt angle α of the side from bottom to top satisfies: 2 ≤ α ≤ 4°; the upward tilt angle of the bottom surface from left to right is 0 ≤ δ ≤ 20°; and the angle η between the upper surface and the horizontal plane satisfies: 0 < η ≤ 30°. This innovative design, with an upward tilt angle of 0 < δ ≤ 20° on the bottom surface of the agitator along the rotation direction, novelly alters the trajectory of the desulfurizing agent, increases the horizontal and radial motion components, prolongs the upward trajectory of the desulfurizing agent, and improves the reaction time between the desulfurizing agent and molten iron.

[0026] The desulfurizing agent is injected into the molten iron through the injection pipe 10 inside the rotary spray gun, comprehensively utilizing the advantages of mechanical stirring desulfurization and injection desulfurization. This ensures desulfurization efficiency, avoids dust generation, and improves the on-site working environment. Furthermore, the design of the rotary spray gun's agitator 7 creates a vortex-like turbulent flow in the molten iron, effectively preventing the formation of large bubbles and improving the kinetic performance of molten iron desulfurization and the utilization rate of the desulfurizing agent. The design of the agitator 7's facing and bottom inclination angles effectively creates a spiral-shaped annular flow of molten iron in the ladle, extending the desulfurizing agent's rising journey and time, further improving the kinetic performance of molten iron desulfurization and the utilization rate of the desulfurizing agent. Therefore, the high-efficiency desulfurization rotary stirring spray gun proposed in this invention can effectively improve desulfurization efficiency and desulfurizing agent utilization, thereby improving the desulfurization environment.

[0027] Matters not covered in this invention are common knowledge.

[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-efficiency desulfurization rotary agitator spray gun, characterized in that: The system includes a connecting flange, connecting bolts, locating pins, a column section, a mixing section, a spraying section, and a spraying pipe. The upper and lower end faces of the connecting flange are coaxially fixed with baffles. The upper end face of the column section is coaxially fixed to the lower end face baffle of the connecting flange via connecting bolts and locating pins. The mixing section is coaxially fixed to the lower end of the column section, and vertical mixing blades are evenly distributed around its outer circumference. The spraying section is coaxially fixed to the lower end of the mixing section. The spraying pipe is vertically inserted between the connecting flange and the spraying section. The upper and lower ends of the spraying pipe are the desulfurizing agent inlet and the desulfurizing agent spray outlet, respectively. The upper end face baffle of the connecting flange has an air outlet. The radial projection of the agitator is a spiral inverted trapezoid, and the forward tilt angle β of the agitator's iron-facing surface from bottom to top satisfies: 5≤β≤20°, the forward tilt angle γ of the back iron-facing surface from bottom to top satisfies: 0≤γ≤20°, the outward tilt angle α of the side surface from bottom to top satisfies: 2≤α≤4°, the upward tilt angle of the bottom surface from left to right is 0<δ≤20°, and the angle η between the upper surface and the horizontal plane satisfies: 0<η≤30°.

2. The high-efficiency desulfurization rotary agitator spray gun according to claim 1, characterized in that: The outer periphery of the lower part of the column section and the outer periphery of the stirring paddle are both provided with a refractory material layer, and multiple V-shaped steel bars are welded between the outer periphery of the column section and the refractory material layer, and between the outer periphery of the stirring paddle and the refractory material layer.

3. The high-efficiency desulfurization rotary stirring spray gun according to claim 1, characterized in that: A lifting lug is fixed to one side of the connecting flange.

4. The high-efficiency desulfurization rotary agitator spray gun according to claim 1, characterized in that: The outer surface of the column section is provided with vertical reinforcing ribs.

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