A molten iron pretreatment device

Abstract

This utility model relates to the field of iron and steel metallurgy technology, specifically disclosing a molten iron pretreatment device, including a ladle, an inclined baffle plate fixed to the bottom of the ladle's inner cavity, slag outlets and liquid outlets respectively provided on the outer walls of the ladle on both sides of the inclined baffle plate, the inclined baffle plate tilting downwards from the liquid outlet towards the slag outlet, a lifting ring fixed to the upper end of the ladle, and a feeding hopper provided at the upper end of the ladle, the upper end of the feeding hopper being inverted conical, the lower end of the feeding hopper being provided with a straight pipe, and a treatment mechanism provided inside the feeding hopper for mixing the added molten iron with additives and reaction gases as it passes through the feeding hopper. Through the setting of the treatment mechanism on the feeding hopper, when the added molten iron enters the ladle through the feeding hopper, a rotating component mixes the additives in the additive box into the molten iron, and then a reaction component mixes the reaction gases with the downward flowing molten iron, improving the mixing effect of the molten iron with the additives and reaction gases, and ensuring the pretreatment quality of the molten iron.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel metallurgy technology, and in particular to a molten iron pretreatment device. Background Technology

[0002] Hot metal pretreatment is a crucial step in steel production, occurring after blast furnace tapping and before steelmaking furnace smelting. It involves treating molten iron using physical or chemical methods to remove impurities (such as desiliconization, desulfurization, and dephosphorization, i.e., the "three removals") or recover valuable elements (such as vanadium, niobium, and tungsten). An existing hot metal pretreatment device (CN 210796520 U) uses a hopper and a straight cylinder to carry a measured amount of additives down with the molten iron during injection, achieving mixing during the descent. A partition B separates the device into two chambers. Impurities resulting from the reaction float to the top of chamber B, while the molten iron flows into chamber A through opening B, thus separating the slag from the molten iron. The hopper and straight cylinder are easily disassembled and can be moved to one side when not in use, facilitating the pouring out of the molten iron. However, in this device, the additives in the additive chamber do not contact the added molten iron evenly when entering the ladle, resulting in poor treatment efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a molten iron pretreatment device to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A molten iron pretreatment device includes a ladle, with an inclined baffle fixed at the bottom of the ladle's inner cavity. A slag outlet and a liquid outlet are respectively provided on the outer walls of the ladle on both sides of the inclined baffle. The inclined baffle slopes downwards from the liquid outlet toward the slag outlet. A lifting ring is fixed at the upper end of the ladle, and a connecting column is provided on the outer wall of the ladle below the lifting ring. The device also includes a feeding hopper located at the upper end of the ladle. The upper end of the feeding hopper is inverted conical, and a straight pipe is provided at the lower end of the feeding hopper. A treatment mechanism is provided inside the feeding hopper to treat the mixing of molten iron with additives and reaction gases as it passes through the feeding hopper. The treatment mechanism includes a rotating assembly with two horizontally arranged components. Additive boxes communicating with the rotating assembly are provided on both sides of the feeding hopper, and a gas reaction assembly for blowing gas onto the molten iron is provided below the rotating assembly.

[0006] Further configuration: The rotating assembly includes a horizontally arranged shaft inside the feeding hopper, with blades evenly distributed around the outer diameter of the shaft, and an injection hole communicating with the additive box is provided on the outer wall of the feeding hopper.

[0007] Further configuration: The rotating shaft is rotatably connected to the feeding hopper, and the blades are tangentially positioned to the feeding hopper.

[0008] Further configuration: The reaction assembly includes a first inclined plate and a second inclined plate disposed inside the straight pipe. The end of the first inclined plate is located above the highest point of the second inclined plate. A gas pipe is disposed below the first inclined plate, and a connecting pipe is connected to the gas pipe, which is connected to the reaction gas source.

[0009] Further settings: The tilt angle of the first inclined plate is greater than the tilt angle of the second inclined plate.

[0010] Further design: An air outlet groove is provided on the surface of the trachea and the second inclined plate.

[0011] Further details: A drainage hole is provided at the lower position of the sloping partition, and the drainage hole is elongated.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] By setting up the processing mechanism on the feeding hopper, when the molten iron is fed into the ladle through the feeding hopper, the rotating component mixes the additives in the additive box into the molten iron. Then, the reaction component mixes the reaction gas with the downward flowing molten iron, which improves the mixing effect of molten iron, additives and reaction gas, and ensures the pretreatment quality of molten iron. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 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.

[0015] Figure 1 This is a schematic diagram of the structure of the molten iron pretreatment device described in this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the molten iron pretreatment device described in this utility model from another perspective;

[0017] Figure 3 This is a schematic diagram of the main cross-section of the molten iron pretreatment device described in this utility model;

[0018] Figure 4 This is a half-sectional structural diagram of the molten iron pretreatment device described in this utility model;

[0019] Figure 5 yes Figure 3 A magnified structural diagram at point A;

[0020] Figure 6 This is a partially enlarged cross-sectional view of the processing mechanism of the molten iron pretreatment device described in this utility model.

[0021] The annotations in the attached figures are explained as follows:

[0022] 11. Ladle; 12. Inclined partition; 121. Leakage hole; 13. Slag outlet; 14. Liquid outlet; 15. Lifting ring; 16. Feed hopper; 161. Straight pipe; 162. Injection hole; 17. Additive box; 18. Connecting column; 21. Rotating shaft; 22. Blade; 23. First inclined plate; 24. Second inclined plate; 25. Gas pipe; 26. Connecting pipe. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-6As shown, a molten iron pretreatment device includes a ladle 11. An inclined baffle 12 is fixed to the bottom of the inner cavity of the ladle 11. A drain hole 121, elongated in shape, is provided at the lower position of the inclined baffle 12. A slag outlet 13 and a liquid outlet 14 are respectively provided on the outer walls of the ladle 11 on both sides of the inclined baffle 12. The inclined baffle 12 slopes downwards from the liquid outlet 14 towards the slag outlet 13. A lifting ring 15 is fixed to the upper end of the ladle 11, symmetrically arranged on both sides. A connecting column 18 is provided on the outer wall of the molten iron ladle 11 below the lifting ring 15. Two sets of lifting ropes are connected to the lifting ring 15 and the connecting column 18 respectively to control the receiving and pouring state of the molten iron ladle 11. It also includes a feeding hopper 16 provided at the upper end of the molten iron ladle 11. The upper end of the feeding hopper 16 is inverted cone-shaped, and a straight pipe 161 is provided at the lower end of the feeding hopper 16. A treatment mechanism is provided inside the feeding hopper 16 to treat the mixing of molten iron with additives and reaction gases when it passes through the feeding hopper 16.

[0027] In this embodiment: the processing mechanism includes a rotating component, which is horizontally arranged in two places. Additive boxes 17 connected to the rotating component are arranged on both sides of the feeding hopper 16. A gas reaction component for blowing gas onto molten iron is arranged on the lower side of the rotating component.

[0028] The rotating assembly includes a rotating shaft 21 horizontally disposed within the feeding hopper 16. Blades 22 are evenly distributed around the outer diameter of the rotating shaft 21. A feeding hole 162 communicating with an additive box 17 is provided on the outer wall of the feeding hopper 16. The rotating shaft 21 is rotatably connected to the feeding hopper 16, and the blades 22 are tangentially disposed to the feeding hopper 16. When molten iron enters the ladle 11 vertically downward through the feeding hopper 16, the blades 22 and the rotating shaft 21 are rotated in the same direction, causing the blades 22 to mix the additives in the additive box 17 into the molten iron, thereby improving the mixing effect of molten iron and additives.

[0029] The reaction assembly includes a first inclined plate 23 and a second inclined plate 24 disposed inside the straight pipe 161. The end of the first inclined plate 23 is located above the highest point of the second inclined plate 24. A gas pipe 25 is disposed below the first inclined plate 23, and a connecting pipe 26 is connected to the gas pipe 25, which is connected to a reaction gas source. The inclination angle of the first inclined plate 23 is greater than that of the second inclined plate 24. Gas outlet grooves are formed on the faces of the gas pipe 25 and the second inclined plate 24. When molten iron falls, it is guided by the first inclined plate 23 and the second inclined plate 24. As the molten iron flows downward from the second inclined plate 24, the gas in the connecting pipe 26 is ejected through the gas pipe 25 and comes into contact with the molten iron, ensuring the quality of the molten iron treatment.

[0030] The working principle and usage process of this utility model are as follows: The molten iron ladle 11 is held vertically at the tapping point of the blast furnace by two sets of suspension ropes, which are respectively suspended on the lifting ring 15 and the connecting column 18. When the molten iron enters the molten iron ladle 11 through the charging hopper 16, the blades 22 and the rotating shaft 21 rotate in the same direction during the falling process. This causes the blades 22 to mix the additives in the additive box 17 into the molten iron. Then, as the molten iron falls, it is guided by the first inclined plate 23 and the second inclined plate 24. When the molten iron flows downward from the second inclined plate 24, the gas in the connecting pipe 26 is sprayed out through the gas pipe 25 and comes into contact with the molten iron. Then, the molten iron enters the molten iron ladle 11 and is divided by the inclined partition 12. By operating the suspension ropes on the connecting column 18, the slag outlet 13 is tilted downward to pour out the slag on the molten iron. Then, the liquid outlet 14 is tilted downward to pour out the molten iron.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A molten iron pretreatment device, comprising a molten iron ladle (11), wherein an inclined partition (12) is fixed at the bottom of the inner cavity of the molten iron ladle (11), and a slag outlet (13) and a liquid outlet (14) are respectively provided on the outer walls of the molten iron ladle (11) on both sides of the inclined partition (12), the inclined partition (12) is inclined downward from the liquid outlet (14) toward the slag outlet (13), a lifting ring (15) is fixed at the upper end of the molten iron ladle (11), and a connecting column (18) is provided on the outer wall of the molten iron ladle (11) below the lifting ring (15), characterized in that: It also includes a feeding hopper (16) located at the upper end of the molten iron ladle (11). The upper end of the feeding hopper (16) is inverted cone-shaped, and a straight pipe (161) is provided at the lower end of the feeding hopper (16). A processing mechanism is provided inside the feeding hopper (16) to treat the molten iron as it passes through the feeding hopper (16) and mixes with additives and reaction gases. The processing mechanism includes a rotating component. The rotating component is horizontally arranged in two places. Additive boxes (17) connected to the rotating component are provided on both sides of the feeding hopper (16). A gas reaction component for blowing gas onto the molten iron is provided below the rotating component.

2. The molten iron pretreatment device according to claim 1, characterized in that: The rotating assembly includes a rotating shaft (21) horizontally disposed in the feeding hopper (16), blades (22) are evenly distributed on the outer diameter of the rotating shaft (21), and an injection hole (162) communicating with the additive box (17) is provided on the outer wall of the feeding hopper (16).

3. The molten iron pretreatment device according to claim 2, characterized in that: The rotating shaft (21) is rotatably connected to the feeding hopper (16), and the blade (22) is tangentially arranged to the feeding hopper (16).

4. The molten iron pretreatment device according to claim 1, characterized in that: The reaction assembly includes a first inclined plate (23) and a second inclined plate (24) disposed inside the straight pipe (161). The end of the first inclined plate (23) is located above the highest point of the second inclined plate (24). A gas pipe (25) is disposed below the first inclined plate (23). A connecting pipe (26) is connected to the gas pipe (25). The connecting pipe (26) is connected to the reaction gas source.

5. The molten iron pretreatment device according to claim 4, characterized in that: The tilt angle of the first inclined plate (23) is greater than the tilt angle of the second inclined plate (24).

6. The molten iron pretreatment device according to claim 4, characterized in that: An air outlet groove is provided on the surface of the air pipe (25) opposite to the second inclined plate (24).

7. The molten iron pretreatment device according to claim 1, characterized in that: The inclined partition (12) has a drain hole (121) at the lower position, and the drain hole (121) is elongated.

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