CN116004950A - Refining smelting process for steel - Google Patents

Abstract

The present invention relates to the technical field of iron and steel smelting, and in particular to a steel refining and smelting process. The iron and steel refining and smelting process is based on an iron and steel smelting device. The iron and steel smelting device includes a base, and two groups of Symmetrically arranged support frames, the upper sides of the support frames that are close to each other are rotatably connected with mounting frames, and a smelting furnace for smelting treatment is provided in the mounting frame; a liquid guide for lifting molten iron is provided in the smelting furnace Assemblies and sieve buckets for slag removal and ash removal, and the lower part of the side of the smelting furnace is also equipped with a molten iron chute for discharging. The invention can conveniently ensure the effective dispersion of additives, and can also provide convenience for the actual process of removing ash and slag, and can ensure the effective dispersion of additives from both internal and external aspects, thereby improving the actual smelting efficiency.

Description

A process for steel refining and smelting

technical field

The invention relates to the technical field of iron and steel smelting, in particular to a process for iron and steel refining and smelting.

Background technique

Iron and steel smelting is the general term for steel and iron metallurgical processes. Industrially produced iron is divided into pig iron (more than 2% carbon content) and steel (less than 2% carbon content) according to the carbon content.

Most modern ironmaking uses blast furnace ironmaking, and some use direct reduction ironmaking method and electric furnace ironmaking method. Steelmaking mainly uses pig iron smelted in blast furnaces, sponge iron smelted by direct reduction ironmaking, and scrap steel as raw materials, which are smelted into steel by different methods. The basic production process is to smelt iron ore into pig iron in an iron-smelting furnace, then use pig iron as raw material to smelt steel by different methods, and then cast it into ingots or continuous casting slabs.

In the process of iron and steel smelting, there will be some slag in the iron ore raw materials, which need to be precipitated by adding nodules during the smelting process and separated to ensure the quality of the smelted steel. However, in the process of iron and steel smelting, most of the additives are added from the surface of molten iron, which is not easy to disperse in the high-temperature molten iron with high density, so that the actual treatment effect cannot achieve the expected purpose and affect the actual smelting effect. For this reason we propose a kind of process for iron and steel refining smelting.

Contents of the invention

The purpose of the present invention is to solve the shortcomings in the prior art, and propose a steel refining and smelting process.

In order to achieve the above object, the present invention adopts the following technical solutions:

A steel refining and smelting process, the iron and steel refining and smelting process is based on an iron and steel smelting device, the iron and steel smelting device includes a base, and two sets of symmetrically arranged support frames are fixedly installed on the top of the base, and the support frame The upper parts of the sides that are close to each other are rotatably connected with mounting frames, and a smelting furnace for smelting treatment is arranged in the mounting frames;

The inside of the smelting furnace is equipped with a liquid guide assembly for lifting molten iron and a sieve bucket for slag removal and ash cleaning, and the lower part of the side of the smelting furnace is also equipped with a molten iron chute for discharging;

The iron and steel refining and smelting process comprises the following steps:

Step S1, leading the raw materials into the smelting furnace, and performing melting treatment to make them appear in a liquid state;

Step S2, sending the slag removal agent to the bottom of the molten iron through the liquid guiding component, and effectively dispersing it in the molten iron under the cooperation of the liquid guiding component;

Step S3, by reversely braking the liquid guide assembly, the molten iron is lifted, and finally guided to the sieve bucket for sieving treatment, effectively achieving the effect of dust removal and slag removal;

Step S4, guide the refining agent and other additives into the molten iron after slag removal through the liquid guide assembly again, improve the quality of the molten iron, and finally make the treated molten iron flow from the molten iron chute by deflecting the overall device It is guided out to complete the smelting process.

As a preferred technical solution of the present application, the smelting furnace includes a furnace body, and the outer side of the furnace body is rotatably provided with two sets of sleeve rings fixedly connected with the installation frame, so as to ensure that the furnace body is hoisted. The free rotation of lubrication is realized during the process, which provides an effective guarantee for internal mixing.

As a preferred technical solution of this application, the outer middle part of the furnace body is provided with an engaging gear ring, and one side of one set of mounting brackets is installed with a motor II, and the output shaft of the motor II is vertically downward and simultaneously The shaft is connected with a meshing gear that meshes with the meshing gear ring, so as to realize the overall rotation of the furnace body and realize the above-mentioned effective mixing process.

As a preferred technical solution of the present application, the liquid guiding assembly includes a liquid guiding tube fixedly installed inside the furnace body, and the center of the liquid guiding tube is provided with a rotating shaft that extends to the outside of the top of the furnace body. Shaft, the part of the rotating shaft located inside the catheter is provided with a conveying auger for conduction, which facilitates the addition of slag remover and refiner, and can also effectively realize the lifting of molten iron.

As a preferred technical solution of the present application, the bottom end of the rotating shaft penetrates and extends to the lower part of the catheter, and several groups of toggle plates distributed in circular arrays are fixedly installed, and the toggle plates are uniformly arranged There are several groups of through holes, and then rotate with the rotating shaft, so that the molten iron inside moves accordingly, speeding up the stirring process and improving the smelting effect.

As a preferred technical solution of the present application, the upper part of the side of the catheter tube is connected with a lifting liquid pipe for leading out the lifted molten iron, and the side of the furnace body facing the lifting liquid pipe is provided with a There is a through hole, the furnace body is pierced with a sieve bucket for slag removal and filtration, and the outside of the furnace body is installed at the through hole with an electric slide table for dragging the sieve bucket to move, thereby lifting the dust removal While achieving the slag removal effect, it is convenient to realize the removal of the fished ash.

As a preferred technical solution of the present application, the top of the furnace body is provided with a motor I, and the output shaft of the motor I and the top of the rotating shaft are coaxially equipped with a pulley, and the outer sleeve of the pulley is provided with the same Set the transmission belt, and then effectively realize the function of lifting the molten iron and adding chemicals of the liquid guide component.

As a preferred technical solution of the present application, the top of the furnace body is provided with a feeding pipe obliquely penetrating into the inside of the furnace body, and the bottom end of the feeding pipe points to the top of the liquid guiding assembly, effectively Realize the addition of slag remover and refiner.

As a preferred technical solution of the present application, a control valve is provided on one side of the molten iron chute, and a sieve plate is installed at the port of the molten iron chute, which further improves the quality of the exported molten iron and ensures The quality of the smelted steel.

The beneficial effects of the present invention are:

1. Through the setting of the liquid guide component, the present invention can effectively guide additives such as slag remover and refiner into the molten iron during iron and steel smelting, and effectively disperse them, so as to better improve the quality of molten iron for smelting , it can also lift the molten iron after adding the slag remover, and finally lift it to the top for filtering and ash removal, reduce the work intensity of ash removal, and provide convenience for actual work;

2. Through the setting of the motor II, the meshing gear and the meshing gear ring, the smelting furnace can be effectively rotated as a whole, and it is convenient for additives to be added to the interior to cooperate with the internal liquid guide assembly to further improve the mixing effect, accelerate the actual smelting process, and improve Smelting efficiency ensures that the process has the effect of saving time and labor.

Description of drawings

Fig. 1 is the structural representation of the iron and steel refining and smelting device that the present invention proposes;

Fig. 2 is the structural representation of the smelting furnace that the present invention proposes;

Fig. 3 is the sectional structure schematic diagram of the smelting furnace that the present invention proposes;

Fig. 4 is a schematic cross-sectional structure diagram of the liquid guide assembly proposed by the present invention;

Fig. 5 is a structural schematic diagram of the screen bucket proposed by the present invention.

In the figure: 1. base; 2. support frame; 3. installation frame; 4. motor II; 5. meshing gear; 6. smelting furnace; 61. furnace body; 62. molten iron chute; 64. Engaging gear ring; 65. Sieve bucket; 66. Electric sliding table; 67. Motor I; 68. Rotation shaft; 69. Feeding tube; 610. Liquid guiding component; 6101. Liquid guiding tube; Tube; 6103, conveying auger; 6104, toggle plate.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Referring to Fig. 1-Fig. 3, a steel refining and smelting process is based on an iron and steel smelting device. The iron and steel smelting device includes a base 1, and two sets of symmetrically arranged support frames 2 are fixedly installed on the top of the base 1. The upper parts of the sides of the support frames 2 that are close to each other are rotatably connected to the mounting frame 3, and the mounting frame 3 is provided with a smelting furnace 6 for smelting treatment;

The smelting furnace 6 is equipped with a liquid guide assembly 610 for lifting molten iron and a sieve bucket 65 for slag removal and ash cleaning. The lower part of the side of the smelting furnace 6 is also equipped with a molten iron chute 62 for discharging. One side of the 62 is provided with a control valve, and a sieve plate is installed at the port of the molten iron chute 62, which further improves the quality of the exported molten iron and ensures the quality of the smelted steel.

The top of the furnace body 61 is provided with a feed pipe 69 that extends obliquely into the interior of the furnace body 61, and the bottom end of the feed pipe 69 points to the top of the liquid guide assembly 610, effectively realizing the addition of slag remover and refiner;

The smelting furnace 6 includes a furnace body 61, and the outer rotating sleeve of the furnace body 61 is provided with two sets of sleeve rings 63 fixedly connected with the installation frame 3, so as to ensure that the furnace body 61 realizes the free rotation of lubrication during the hoisting process, and provides internal The mixture of provides effective guarantee.

The outer middle part of the furnace body 61 is provided with an engaging gear ring 64, and one side of one set of mounting frames 3 is equipped with a motor II4, and the output shaft of the motor II4 is vertically downward and coaxially connected with an engaging gear ring 64. The gear 5 further realizes the overall rotation of the furnace body 61 to realize the above-mentioned effective mixing process.

Referring to Fig. 4, the liquid guiding assembly 610 includes a liquid guiding tube 6101 fixedly installed inside the furnace body 61. The center of the liquid guiding tube 6101 is provided with a rotating shaft 68 extending to the outside of the top of the furnace body 61, and the rotating shaft 68 is positioned at the liquid guiding position. Part of the inner side of the pipe 6101 is provided with a conveying auger 6103 for conduction, which facilitates the addition of slag remover and refiner, and can also effectively realize the lifting of molten iron.

The bottom end of the rotating shaft 68 runs through and extends to the lower part of the catheter 6101, and is fixedly installed with several groups of toggle plates 6104 distributed in an annular array. The rotation makes the molten iron inside move accordingly, speeding up the stirring process and improving the smelting effect.

Referring to Fig. 3-Fig. 5, the upper part of the side of the catheter 6101 is communicated with a lifting liquid pipe 6102, which is used to lead out the lifted molten iron, and the side of the furnace body 61 facing the lifting liquid pipe 6102 is provided with a through hole , the furnace body 61 is pierced with a sieve bucket 65 for slag removal and filtration at the through hole, and an electric slide table 66 for dragging the sieve bucket 65 to move is installed on the outside of the furnace body 61 at the through hole, thereby lifting the ash removal and slag removal While achieving the effect, it is convenient to realize the taking out of the fished ash.

The top of the furnace body 61 is provided with a motor I67, and the output shaft of the motor I67 and the top of the rotating shaft 68 are coaxially equipped with a pulley, and the outer side of the pulley is provided with the same set of transmission belts, thereby effectively realizing the lifting of the liquid guide assembly 610. Liquid and additive functions.

The iron and steel refining and smelting process includes the following steps:

Step S1, leading the raw material into the interior of the smelting furnace 6, and performing melting treatment to make it appear in a liquid state;

Step S2, send the slag removal agent to the bottom of the molten iron through the liquid guide assembly 610, and effectively disperse it in the molten iron under the cooperation of the liquid guide assembly 610;

Step S3, by reversely braking the liquid guide assembly 610, the molten iron is lifted, and finally guided to the sieve bucket 65 for sieving treatment, effectively achieving the effect of dust removal and slag removal;

Step S4, guide the refining agent and other additives into the molten iron after deslagging through the liquid guide assembly 610 again, improve the quality of the molten iron, and finally make the treated molten iron slip from the molten iron by deflecting the overall device Road 62 is guided out to complete the smelting process.

Finally, it should be noted that in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal" etc. is based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the foregoing embodiments The recorded technical solutions are modified, or some of the technical features are equivalently replaced. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. The steel refining smelting process is characterized by taking a steel smelting device as a basis, wherein the steel smelting device comprises a base (1), two groups of symmetrically arranged supporting frames (2) are fixedly arranged at the top end of the base (1), mounting frames (3) are rotatably connected to the upper parts of the mutually adjacent side surfaces of the supporting frames (2), and a smelting furnace (6) for smelting is arranged in the mounting frames (3);

a liquid guide component (610) for lifting molten iron and a sieve bucket (65) for slag-fishing and ash-cleaning treatment are arranged in the smelting furnace (6), and a molten iron chute (62) for discharging is also arranged at the lower part of the side surface of the smelting furnace (6);

the steel refining smelting process comprises the following steps:

step S1, guiding raw materials into a smelting furnace (6) for melting treatment to enable the raw materials to be in a liquid state;

s2, conveying the slag removing agent to the bottom of the molten iron through a liquid guide assembly (610), and effectively dispersing the slag removing agent in the molten iron under the cooperation of the liquid guide assembly (610);

s3, lifting molten iron by a reverse brake liquid guide assembly (610), and finally guiding the molten iron to a sieve bucket (65) for sieving treatment, so that the effects of ash removal and slag removal are effectively achieved;

and S4, introducing other additives such as a refiner and the like into the deslagged molten iron through the liquid guide assembly (610), improving the quality of the molten iron, and finally guiding the treated molten iron out of the molten iron chute (62) through deflecting the integral device to finish the smelting process.

2. The smelting process for refining steel according to claim 1, wherein the smelting furnace (6) comprises a furnace body (61), and two sets of sleeved rings (63) fixedly connected with the mounting frame (3) are rotatably sleeved on the outer side of the furnace body (61).

3. A refining process for steel according to claim 2, characterized in that the middle of the outside of the furnace body (61) is provided with a meshing toothed ring (64), and that one side of one set of mounting frames (3) is provided with a motor ii (4), and that the output shaft of the motor ii (4) is vertically downward and coaxially connected with a meshing gear (5) meshing with the meshing toothed ring (64).

4. The refining smelting process for steel according to claim 2, wherein the liquid guiding assembly (610) comprises a liquid guiding tube (6101) fixedly installed inside the furnace body (61), a rotating shaft (68) penetrating and extending to the outer side of the top of the furnace body (61) is arranged at the center of the liquid guiding tube (6101), and a conveying auger (6103) for conducting is arranged at the outer side of the part of the rotating shaft (68) located at the inner side of the liquid guiding tube (6101).

5. The refining smelting process for steel according to claim 4, wherein the bottom end of the rotating shaft (68) extends to the lower part of the liquid guiding tube (6101) in a penetrating way, a plurality of groups of stirring plates (6104) distributed in a ring-shaped array are fixedly arranged, and a plurality of groups of through holes are uniformly formed in the stirring plates (6104).

6. The refining smelting process for steel according to claim 4, wherein a lifting liquid outlet pipe (6102) is communicated with the upper portion of the side surface of the liquid guide pipe (6101) and used for guiding out lifted molten iron, a through hole is formed in the side surface of a furnace body (61) opposite to the lifting liquid outlet pipe (6102), a sieve bucket (65) is arranged on the furnace body (61) in a penetrating mode, and a useful electric sliding table (66) is arranged on the outer side of the furnace body (61) in the penetrating mode.

7. The refining smelting process for steel according to claim 4, wherein the top of the furnace body (61) is provided with a motor I (67), the output shaft of the motor I (67) and the top end of the rotating shaft (68) are coaxially provided with belt pulleys, and the outer sides of the belt pulleys are sleeved with the same group of transmission belts.

8. A refining process for steel according to claim 2, characterized in that the top end of the furnace body (61) is provided with a feed pipe (69) extending obliquely through the interior of the furnace body (61), the bottom end of the feed pipe (69) being directed towards the top end of the tapping component (610).

9. The refining and smelting process for steel according to claim 1, wherein a control valve is arranged on one side of the molten iron chute (62), and a screen plate is installed at a port of the molten iron chute (62).

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