CN219079570U - High-efficient desulfurization rotary stirring spray gun - Google Patents

Abstract

A high-efficiency desulfurization rotary stirring spray gun comprises a connecting flange, a connecting bolt, a locating pin, a column section, a stirring section, a blowing section and a blowing pipe; the upper end face and the lower end face of the connecting flange are respectively and coaxially fixedly connected with a baffle; the upper end face of the upright post section is coaxially and fixedly connected with a baffle plate of the lower end face of the connecting flange through a connecting bolt and a locating pin; the stirring section is coaxially and fixedly connected to the lower end of the upright post section, and vertical stirring paddles are uniformly distributed on the circumference of the end face of the outer circumference; the blowing section is coaxially and fixedly connected to the lower end of the stirring section; the blowing pipe is vertically and penetratingly arranged between the connecting flange and the interior of the blowing section; the upper end and the lower end of the blowing pipe are respectively provided with a desulfurizing agent inlet and a desulfurizing agent blowing opening; and the surface of the baffle plate on the upper end surface of the connecting flange is provided with an air outlet. The utility model designs the upward inclination angle of 0 < delta less than or equal to 20 degrees on the bottom surface of the blade along the rotation direction for the first time, innovatively changes the movement track of the desulfurizing agent, and can improve the desulfurizing efficiency and the utilization rate of the desulfurizing agent, thereby improving the desulfurizing environment.

Description

High-efficient desulfurization rotary stirring spray gun

Technical Field

The utility model relates to the technical field of desulfurization in the metallurgical industry, in particular to a high-efficiency desulfurization rotary stirring spray gun.

Background

There are two main types of desulfurization methods commonly used in the metallurgical industry at present, namely a KR method and a blowing method.

The KR method is a molten iron desulfurization method adopting a mechanical stirring mode, when molten iron is desulfurized in a ladle, a desulfurizing agent is added to the surface of the ladle, and the desulfurizing agent and the molten iron are fully mixed and reacted through a stirring head; the method has the advantages that: (1) The desulfurization dynamic conditions are good, the low-cost desulfurizing agent is favorable, and the desulfurization effect is relatively good; (2) Mechanically stirring to mix desulfurizing agent and molten iron; (3) deep desulfurization can be realized; the disadvantages and shortcomings of the KR process are due to the method of desulfurizing the sulfur by adding the desulfurizing agent: (1) Because the KR desulphurizing agent is added from the surface of molten iron, the high-temperature gas on the surface of molten iron can diffuse and float part of the added desulphurizing agent at the same time of adding, so that a large amount of dust is generated in a desulphurizing workshop, the working environment is bad, and the service life of equipment is influenced; (2) In order to quickly screw the desulfurizing agent into molten iron and mix and react with molten iron in a ladle, a high-power high-speed stirring device is required to be applied, the equipment cost is high and complex, and the energy consumption is increased; (3) The KR method is used for screwing the desulfurizing agent into molten iron through mechanical stirring, the desulfurizing agent is often agglomerated, the desulfurizing agent cannot be fully mixed with the molten iron, and the dosage of the desulfurizing agent is increased.

The blowing method is to spray desulfurizing agent into molten iron with desulfurizing gun via carrier gas to stir the carrier gas and to mix the sprayed gas, desulfurizing agent and molten iron together for desulfurizing. The advantages are (1) low equipment cost; (2) The desulfurizing agent can be easily sprayed into molten iron, and the desulfurizing agent cannot be agglomerated; the disadvantage of the blowing desulfurization method is that (1) the dynamic condition of the method is poor, in order to fully mix the desulfurizing agent with the molten iron, larger air pressure and air quantity are needed, but the disadvantage is that the generated air bubbles are large, and the large air bubbles burst on the shallow surface of the molten iron to generate splashing; the desulfurizing agent in the bubbles can not be mixed and reacted with molten iron, so that waste is large; (2) the dead zone is large, and uniform desulfurization is difficult to realize; (3) Deep desulfurization cannot be realized, the desulfurization time is long, the desulfurization rate is low, and the desulfurization rate is about 1/4 of the KR method desulfurization rate.

With the high-speed development of social economy and steel industry, the requirements on steel quality are higher and more demanding, and with the gradual improvement of environmental standards and the requirements of countries on cost reduction and synergy in recent years, the requirements of countries on the environment and cost reduction and synergy of steel workshops are also higher and more demanding, so that the defects of the two desulfurization methods are obvious, and therefore, how to solve the defects and shortages of the existing desulfurization technology is urgent.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide a high-efficiency desulfurization rotary stirring spray gun which can effectively improve the desulfurization efficiency and the utilization rate of a desulfurizing agent, thereby improving the desulfurization environment and solving the problems existing in the field at the present stage.

The technical scheme adopted by the utility model is as follows:

the utility model provides a high-efficiency desulfurization rotary stirring spray gun, which comprises a connecting flange, a connecting bolt, a locating pin, a column section, a stirring section, a blowing section and a blowing pipe; the upper end face and the lower end face of the connecting flange are respectively and coaxially fixedly connected with a baffle; the upper end face of the upright post section is coaxially and fixedly connected with a baffle plate of the lower end face of the connecting flange through a connecting bolt and a locating pin; the stirring section is coaxially and fixedly connected to the lower end of the upright post section, and vertical stirring paddles are uniformly distributed on the circumference of the end face of the outer circumference; the blowing section is coaxially and fixedly connected to the lower end of the stirring section; the blowing pipe vertically penetrates through the connecting flange and the inside of the blowing section; the upper end and the lower end of the blowing pipe are respectively provided with a desulfurizing agent inlet and a desulfurizing agent blowing opening; and the surface of the baffle plate on the upper end surface of the connecting flange is provided with an air outlet.

Furthermore, the outer peripheral surface of the lower area of the upright post section and the outer peripheral surface of the stirring paddle are both provided with refractory material layers, and a plurality of V-shaped reinforcing steel bars are welded between the outer peripheral surface of the upright post section and the refractory material layers and between the outer peripheral surface of the stirring paddle and the refractory material layers.

Further, the radial projection of the stirring paddle is spiral reverse trapezoid, and the front inclination angle beta of the iron facing surface of the stirring paddle from bottom to top meets the following conditions: beta is more than or equal to 5 and less than or equal to 20 degrees, and the front inclination angle gamma of the back iron surface from bottom to top meets the following conditions: gamma is more than or equal to 0 and less than or equal to 20 degrees, and the camber angle alpha of the side surface from bottom to top meets the following conditions: alpha is more than or equal to 2 and less than or equal to 4 degrees, the upward inclination angle of the bottom surface from left to right is more than or equal to 0 and less than or equal to 20 degrees, and the included angle eta between the upper surface and the horizontal plane meets the following conditions: η is more than 0 and less than or equal to 30 degrees.

Further, a lifting lug plate is fixedly connected to one side of the connecting flange.

Further, the outer surface of the upright post section is provided with a vertical reinforcing rib plate.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a rotary stirring spray gun, which comprises a main body and stirring paddles arranged on the outer peripheral surface of the main body; the inside of the main body is penetrated with a blowing pipe, and two ends of the blowing pipe are respectively provided with a desulfurizing agent inlet and a desulfurizing agent outlet. According to the rotary stirring spray gun, the desulfurizing agent is sprayed into molten iron through the spraying pipe in the rotary spray gun, so that the advantages of mechanical stirring desulfurization and spraying desulfurization are comprehensively utilized, the desulfurization efficiency is ensured, dust generation is avoided, and the improvement of the field working environment is facilitated; the design of the stirring paddle of the rotary spray gun can enable molten iron to form vortex turbulence, effectively avoid the generation of large bubbles, and improve the dynamic performance of molten iron desulfurization and the utilization rate of desulfurizing agents. Meanwhile, due to the design of the inclination angles of the iron facing surface and the bottom surface of the stirring paddle of the rotary spray gun, molten iron in the ladle can effectively form spiral annular flow, the floating stroke and time of the desulfurizing agent are prolonged, and the dynamic performance of molten iron desulfurization and the utilization rate of the desulfurizing agent are further improved. Therefore, the high-efficiency desulfurization rotary stirring spray gun provided by the utility model can improve the desulfurization efficiency and the utilization rate of the desulfurizing agent, improve the desulfurization environment and effectively solve the problems existing in the field at the present stage.

Drawings

FIG. 1 is a schematic elevational view of the present utility model;

FIG. 2 is a cross-sectional view of A-A of FIG. 1;

FIG. 3 is a view in the F direction of FIG. 1;

fig. 4 is a cross-sectional view of B-B of fig. 1.

Wherein, the reference numerals: 1-a connecting flange; 2-lifting the lug plate; 3-connecting bolts; 4-an upper baffle; 5-a lower baffle; 6-reinforcing rib plates; 7-stirring paddles; 8-a blowing section; 9-desulfurizing agent inlet; 10-blowing pipe; 11-column sections; 12-a layer of refractory material; 13-V-shaped steel bars; 14-desulfurizing agent injection port; 15-an air outlet hole; 16-locating pins.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

In the description of the present utility model, it should be noted that the terms "upper," "lower," "top," "bottom," "one side," "another side," "left," "right," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not mean that the device or element must have a specific orientation, be configured and operate in a specific orientation.

Referring to fig. 1-4, a specific structure of an embodiment of a high-efficiency desulfurization rotary stirring spray gun is provided. The utility model divides the traditional integral spray gun into an upper part and a lower part of a flange connecting section and a stirring and blowing section. Specifically, the spray gun comprises a connecting flange 1, a connecting bolt 3, a blowing section 8, a blowing pipe 10, a column section 11, a locating pin 16 and a stirring section.

An upper baffle 4 and a lower baffle 5 are coaxially and fixedly connected with the upper end face and the lower end face of the connecting flange 1 respectively; one side of the connecting flange 1 is fixedly connected with a lifting lug plate 2; the upright post section 11 is a hollow pipe, the outer surface of the upright post section is provided with a vertical reinforcing rib plate 6, and the upper end surface of the upright post section 11 is coaxially and fixedly connected with the lower baffle plate 5 of the connecting flange 1 through the connecting bolt 3 and the positioning pin 16; the stirring section is coaxially and fixedly connected to the lower end of the upright post section 11, and vertical stirring paddles 7 are uniformly distributed on the circumference of the outer circumferential end surface of the lower part of the stirring section; the blowing section 8 is coaxially and fixedly connected to the lower end of the stirring section; the blowing pipe 10 is vertically and penetratingly arranged between the connecting flange 1 and the interior of the blowing section 8; the upper end and the lower end of the blowing pipe 10 are respectively provided with a desulfurizing agent inlet 9 and a desulfurizing agent blowing opening 14; the surface of the upper baffle plate 4 of the connecting flange 1 is provided with an air outlet hole 15.

In this embodiment, as shown in fig. 2, the refractory layer 12 is disposed on the outer peripheral surface of the lower area of the upright section 11 and the outer peripheral surface of the stirring paddle 7, and a plurality of V-shaped steel bars 13 are welded between the outer peripheral surface of the upright section 11 and the refractory layer 12 and between the outer peripheral surface of the stirring paddle 7 and the refractory layer 12.

The radial projection of the stirring paddle 7 is spiral reverse trapezoid, and the front inclination angle beta of the iron facing surface of the stirring paddle 7 from bottom to top meets the following conditions: beta is more than or equal to 5 and less than or equal to 20 degrees, and the front inclination angle gamma of the back iron surface from bottom to top meets the following conditions: gamma is more than or equal to 0 and less than or equal to 20 degrees, and the camber angle alpha of the side surface from bottom to top meets the following conditions: alpha is more than or equal to 2 and less than or equal to 4 degrees, the upward inclination angle of the bottom surface from left to right is more than 0 and less than or equal to 20 degrees, and the included angle eta between the upper surface and the horizontal plane meets the following conditions: η is more than 0 and less than or equal to 30 degrees. The initial inclination angle is designed to be more than 0 and less than or equal to 20 degrees along the rotation direction on the bottom surface of the blade, the movement track of the desulfurizing agent is innovatively changed, the horizontal and radial movement components are increased, the floating track of the desulfurizing agent is prolonged, and the reaction time of the desulfurizing agent and molten iron is improved.

The desulfurizing agent is sprayed into molten iron through the blowing pipe 10 in the rotary spray gun, so that the advantages of mechanical stirring desulfurization and blowing desulfurization are comprehensively utilized, the desulfurization efficiency is ensured, dust generation is avoided, and the improvement of the field working environment is facilitated; and the design of the stirring paddle 7 of the rotary spray gun can lead the molten iron to form vortex turbulence, effectively avoid the generation of large bubbles, and improve the dynamic performance of molten iron desulfurization and the utilization rate of desulfurizing agents. And the design of the inclination angles of the iron facing surface and the bottom surface of the stirring paddle 7 can effectively lead molten iron in the ladle to form spiral annular flow, prolong the floating stroke and time of the desulfurizing agent, and further improve the dynamic performance of molten iron desulfurization and the utilization rate of the desulfurizing agent. Therefore, the high-efficiency desulfurization rotary stirring spray gun provided by the utility model can effectively improve the desulfurization efficiency and the utilization rate of the desulfurizing agent, thereby improving the desulfurization environment.

The utility model is not particularly limited to the known technology.

The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims (5)

1. The utility model provides a rotatory stirring spray gun of high-efficient desulfurization which characterized in that: the device comprises a connecting flange, a connecting bolt, a positioning pin, a column section, a stirring section, a blowing section and a blowing pipe; the upper end face and the lower end face of the connecting flange are respectively and coaxially fixedly connected with a baffle; the upper end face of the upright post section is coaxially and fixedly connected with a baffle plate of the lower end face of the connecting flange through a connecting bolt and a locating pin; the stirring section is coaxially and fixedly connected to the lower end of the upright post section, and vertical stirring paddles are uniformly distributed on the circumference of the end face of the outer circumference; the blowing section is coaxially and fixedly connected to the lower end of the stirring section; the blowing pipe vertically penetrates through the connecting flange and the inside of the blowing section; the upper end and the lower end of the blowing pipe are respectively provided with a desulfurizing agent inlet and a desulfurizing agent blowing opening; and the surface of the baffle plate on the upper end surface of the connecting flange is provided with an air outlet.

2. The high efficiency desulfurization rotary stirring spray gun according to claim 1, wherein: the outer peripheral surface of the lower part area of the upright post section and the outer peripheral surface of the stirring paddle are both provided with refractory material layers, and a plurality of V-shaped reinforcing steel bars are welded between the outer peripheral surface of the upright post section and the refractory material layers and between the outer peripheral surface of the stirring paddle and the refractory material layers.

3. The high efficiency desulfurization rotary stirring spray gun according to claim 1, wherein: the radial projection of stirring rake is spiral form trapezoid, just the front inclination beta from bottom to top of the iron facing surface of stirring rake satisfies: beta is more than or equal to 5 and less than or equal to 20 degrees, and the front inclination angle gamma of the back iron surface from bottom to top meets the following conditions: gamma is more than or equal to 0 and less than or equal to 20 degrees, and the camber angle alpha of the side surface from bottom to top meets the following conditions: alpha is more than or equal to 2 and less than or equal to 4 degrees, the upward inclination angle of the bottom surface from left to right is more than 0 and less than or equal to 20 degrees, and the included angle eta between the upper surface and the horizontal plane meets the following conditions: η is more than 0 and less than or equal to 30 degrees.

4. The high efficiency desulfurization rotary stirring spray gun according to claim 1, wherein: one side of the connecting flange is fixedly connected with a lifting lug plate.

5. The high efficiency desulfurization rotary stirring spray gun according to claim 1, wherein: the outer surface of the upright post section is provided with a vertical reinforcing rib plate.

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