Gun head of RH top lance, RH refining furnace top lance and RH refining furnace

Abstract

The invention relates to the technical field of metallurgy, in particular to an RH top lance head, an RH refining furnace top lance and an RH refining furnace. The invention provides an RH top lance head which comprises a lance head body, the lance head body is provided with an input end, a first output part and a second output part, the input end is used for inputting reaction gas to the first output part and the second output part, the first output part is arranged on one face of the lance head body, and the second output part is arranged on the other face of the lance head body. The second output portion is provided on a surface adjacent to the first output portion. According to the technical scheme, the baking efficiency of the vacuum chamber and multiple choices of oxygen blowing modes are improved, the oxygen utilization rate is higher, and the production efficiency and the temperature stability of the vacuum chamber are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of metallurgical technology, and in particular to a lance head of an RH top lance, an RH refining furnace top lance and an RH refining furnace. Background Art

[0002] RH refining method, namely, molten steel vacuum circulation degassing method, is characterized in that two circulation pipes communicating with the lower part of the vacuum chamber are arranged. During degassing treatment, the circulation pipes are inserted into the molten steel, and the pressure difference established after the vacuum chamber is evacuated causes the molten steel to enter the vacuum degassing chamber from the circulation pipes. At the same time, driving gas is blown into one of the two circulation pipes (the ascending pipe), and the bubble pump principle is used to draw the molten steel through the degassing chamber and the descending pipe to generate a circulation motion, and the gas is removed in the vacuum chamber.

[0003] The RH refining method is the preferred refining method for efficient production of high-end varieties. The RH method has the functions of cyclic mixing, vacuum degassing and decarburization. However, the molten steel will splash during the treatment process, causing cold steel and residue to be stained on the side walls of the vacuum chamber. During the smelting process of molten steel, some cold steel and residue will enter the molten steel, increasing the oxidation of the steel, reducing the absorption rate of aluminum, and causing a certain impact on the quality of the molten steel.

[0004] At present, the RH top gun, on the one hand, uses the top gun to blow oxygen and ignite the coal-oxygen mixture in the gap between RH smelting molten steel to perform mixed baking mode to perform cold steel and baking insulation operations. On the other hand, the top gun is used to blow oxygen to the molten steel to increase the temperature or deep decarburize it to achieve metallurgical effects. During the RH furnace smelting process, the oxygen absorption rate is low, which affects the RH heating efficiency and decarburization rate during the smelting gap. During the smelting gap, the coal-oxygen reaction baking flame range is small, the vacuum chamber temperature rises slowly, and the baking efficiency is slow, which affects the smelting efficiency of the molten steel. Summary of the invention

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] To this end, in the first aspect of the present disclosure, a gun head of a RH top gun is provided, comprising a gun head body, the gun head body having an input end, a first output part and a second output part, the input end being used to input reaction gas to the first output part and the second output part, wherein the first output part is arranged on one side of the gun head body, and the second output part is arranged on a side adjacent to the first output part.

[0007] In a feasible embodiment, the first output part includes a gas reaction part, a first input passage and a second input passage, the gas reaction part is connected to the first output part, and the first input passage and the second input passage are connected to the gas reaction part.

[0008] In a feasible embodiment, it further comprises a plurality of connecting passages, wherein the connecting passages have an input port and an output port, wherein the input port is connected to the second input passage, and the output port is connected to the gas reaction part;

[0009] The second output part includes a third input passage and a fourth input passage, one end of the third input passage passes through the second input passage, and the other end opposite thereto is communicated with the second output part;

[0010] The fourth input passage is in communication with the second output portion.

[0011] In a feasible implementation manner, a guide portion is circumferentially provided at the gas reaction portion, the guide portion is disposed in the second input passage, and the input port is disposed at one end of the guide portion facing the flow direction of the reaction gas.

[0012] In a feasible implementation manner, the connection between the first input passage and the gas reaction part is configured with a neck.

[0013] In a feasible implementation manner, the second output portion includes a third input passage and a fourth input passage, and the third input passage and the fourth input passage are respectively connected to the second output portion.

[0014] In a feasible embodiment, the second output portion has a plurality of first output passages and a plurality of second output passages, the plurality of first output passages are connected to the third input passage, and the plurality of second output passages are connected to the fourth input passage.

[0015] In a feasible implementation manner, a circulating cooling portion is further provided inside the gun head body, and the cooling circulating portion is provided along the extension direction of the gun head body, and the cooling circulating portion is used to reduce the temperature of the outer wall of the gun head body.

[0016] In a second aspect of the present disclosure, a RH refining furnace top lance is provided, comprising the lance head of the above-mentioned RH top lance.

[0017] In a third aspect of the present disclosure, an RH refining furnace is provided, comprising the above-mentioned RH refining furnace top lance.

[0018] The above description is only an overview of the technical solution provided by the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented according to the contents of the specification. In order to make the above and other features and effects of the present disclosure more obvious and easy to understand, the implementation methods of the present disclosure are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0022] Figure 1 It is a structural schematic diagram of the connection passage and the third input passage of the present disclosure being connected to the second input passage;

[0023] Figure 2 It is a schematic diagram of the structure in which the second input passage and the third input passage of the upper seat of the present disclosure are independently arranged;

[0024] Figure 3 This is a schematic diagram of the arrangement position structure of the first output unit and the second output unit disclosed in the present invention.

[0025] in, Figures 1 to 3 The correspondence between the figure numbers and the component names is: 1-gun head body; 11-input end; 12-first output part; 121-gas reaction part; 122-first input passage; 123-second input passage; 13-second output part; 131-third input passage; 132-fourth input passage; 133-first output passage; 134-second output passage; 14-connecting passage; 15-guide part; 2-circulating cooling part. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0028] At present, RH refining method is the preferred refining method for efficient production of high-end varieties. RH method has the functions of circulating mixing, vacuum degassing and decarburization, but the molten steel will splash during the treatment process, resulting in cold steel and residue on the side wall of the vacuum chamber. Some cold steel and residue will enter the molten steel during the smelting process, increasing the oxidizability of the steel, reducing the absorption rate of aluminum, and causing a certain impact on the quality of the molten steel. On the one hand, the RH top gun uses the top gun to blow oxygen and ignite the coal-oxygen mixture in the gap between RH smelting molten steel to perform mixed baking mode to perform cold steel and baking insulation operations. On the other hand, the top gun is used to blow oxygen to heat up the molten steel or deep decarburize to achieve metallurgical effects. During the RH furnace smelting process, the oxygen absorption rate is low when the top gun is used to blow oxygen to heat up the molten steel or deep decarburize it, which affects the RH heating efficiency and decarburization rate; during the smelting gap, the coal-oxygen reaction baking flame range is small, the vacuum chamber temperature rises slowly, and the baking efficiency is slow, which affects the smelting efficiency of molten steel.

[0029] Based on this, an embodiment of the present disclosure provides a gun head of a RH top gun. The present disclosure changes the technical problem that the existing top gun only performs baking within a vertical range through the main gas pipeline and the oxygen pipeline, and the baking area is small, by setting a second output part. In addition, multiple oxygen blowing operation modes are carried out in parallel, which increases the mixed reaction area of ​​the baking gas and oxygen, and the oxygen blowing cross-section, thereby increasing the baking range and the oxygen blowing reaction range, and realizing baking and cooling steel operations on more planes in the vacuum chamber.

[0030] This invention improves the baking efficiency of the vacuum chamber and the multiple choices of oxygen blowing methods, has a higher oxygen utilization rate, and improves production efficiency and temperature stability of the vacuum chamber.

[0031] The gun head of the RH top gun is described in detail below through a specific embodiment:

[0032] Reference Figures 1 to 3 As shown, in the first aspect of the present disclosure, a gun head of a RH top gun is provided, comprising a gun head body 1, the gun head body 1 having an input end 11, a first output portion 12 and a second output portion 13, the input end 11 being used to input reaction gas to the first output portion 12 and the second output portion 13, wherein the first output portion 12 is arranged on one side of the gun head body 1, and the second output portion 13 is arranged on a surface adjacent to the first output portion 12.

[0033] The gun head body 1 of the present disclosure can be set as a cylinder or a rectangular body. The present disclosure is specifically set as a cylindrical gun head, wherein the input end 11 is an end for connecting the reaction gas and the top gun, and its specific connection method is a common technology in the field and will not be repeated herein. Exemplarily, the first output portion 12 is arranged on one end face of the gun head body 1, specifically the end opposite to the input end 11, and it is output vertically toward the bottom of the vacuum chamber, and a certain output angle can also be set according to actual conditions. The second output portion 13 is arranged on the surface adjacent to the first output portion 12 to increase the range of the coal oxygen reaction baking flame, improve the temperature rise efficiency and baking efficiency of the vacuum chamber. Specifically, in the case where the first output portion 12 is arranged on one end face of the gun head body 1, the second output portion 13 is arranged on the side wall of the gun head body 1, for example, uniformly distributed along the circumference of the gun head body 1, and can also be arranged at any position of the side wall of the gun head body 1 as needed. The present disclosure specifically distributes the output port of the second output portion 13 uniformly along the circumference of the gun head body 1 to facilitate the uniformity of heating and baking. It should be noted that the reaction gas described in the present disclosure can be one or more of the various reaction gases available in the art, such as oxygen, fuel gas, or a mixture of oxygen and smoke. In specific implementation, oxygen and fuel gas can be discharged from the output ports of the first output portion 12 and the second output portion 13 through separate pipelines, or can be mixed in the first output portion 12 and the second output portion 13 and then discharged.

[0034] In some embodiments, the first output unit 12 includes a gas reaction unit 121 , a first input passage 122 , and a second input passage 123 . The gas reaction unit 121 is connected to the first output unit 12 , and the first input passage 122 and the second input passage 123 are connected to the gas reaction unit 121 .

[0035] In this embodiment, the first output part 12 includes a gas reaction part 121, a first input passage 122 and a second input passage 123. The first input passage 122 and the second input passage 123 respectively input different reaction gases to mix in the gas reaction part 121. In the present disclosure, oxygen is input into the first input passage 122 and fuel gas is input into the second input passage 123. Figure 1 As shown, the first input passage 122 is arranged along the extension direction of the gun head body 1, and the central axis of the first input passage 122 overlaps with the central axis of the gun head body 1, that is, it is arranged in the center position of the gun head body 1 to facilitate the layout of other pipelines and the stability of the input gas pressure.

[0036] In some embodiments, it also includes multiple connecting passages 14, the connecting passages 14 have an input port and an output port, the input port is connected to the second input passage 123, and the output port is connected to the gas reaction part 121; the second output part 13 includes a third input passage 131 and a fourth input passage 132, one end of the third input passage 131 passes through the second input passage 123, and the other end opposite to it is connected to the second output part 13; the fourth input passage 132 is connected to the second output part 13.

[0037] In this embodiment, the connecting passage 14 has an input port and an output port. The connecting passage 14 is used to allow the first output portion 12 and the second output portion 13 to share a second input passage 123, so as to reduce the internal layout space occupied by the gun head body 1. When the second input passage 123 inputs the reaction gas, the reaction gas can enter the first output portion 12 and the second output portion 13 through the connecting passage 14 and the third input passage 131 respectively. Specifically, under specific working conditions, the first input passage 122 continuously inputs the reaction gas to the gas reaction portion 121, such as Figure 1 As shown, the diameter of the first input passage 122 is larger than that of the second input passage 123, and the pressure of the input gas can drive the reaction gas input through the connecting passage 14 to flow toward the outlet side of the first output part 12, so as to prevent the internal gas in the gas reaction part 121 from flowing back to the second input passage 123. Furthermore, the connecting passage 14 can be configured to slope from one side of the second input passage 123 toward the outlet side of the first output part 12, so as to better prevent the mixed reaction gas from flowing back.

[0038] In some embodiments, a guide portion 15 is circumferentially disposed on the gas reaction portion 121 . The guide portion 15 is disposed in the second input passage 123 , and an input port is disposed at one end of the guide portion 15 facing the flow direction of the reaction gas.

[0039] In this embodiment, the first input passage 122 is the main passage, and the second input passage 123 is the gap between the outer wall of the first input passage 122 and the inner wall of the gun head body 1. At the same time, the connecting passage 14 and the third input passage 131 are also connected to the second input passage 123. At this time, the problem of the flow direction of the reaction gas is involved. Because the gas reaction part 121 mixes the reaction gas inside the gun head body 1, and is also the main baking range, the present invention discloses a guide part 15 on the circumference of the gas reaction part 121, and the input port is set on one end face of the guide part 15 facing the flow direction of the reaction gas, so as to increase the amount of reaction gas entering the gas reaction part 121 through the connecting passage 14.

[0040] In some embodiments, the connection between the first input passage 122 and the gas reaction part 121 is configured to be constricted.

[0041] In this embodiment, in order to better prevent the connection passage 14 from backflowing the reaction gas, the connection between the first input passage 122 and the gas reaction unit 121 of the present invention is necked to increase the flow rate of the reaction gas input from the first input passage 122 to the gas reaction unit 121.

[0042] In some embodiments, the second output portion 13 includes a third input passage 131 and a fourth input passage 132 , and the third input passage 131 and the fourth input passage 132 are respectively communicated with the second output portion 13 .

[0043] In this embodiment, the second output part 13 includes a third input passage 131 and a fourth input passage 132, and the third input passage 131 and the fourth input passage 132 are respectively connected to the second output part 13. The third input passage 131 and the fourth input passage 132 of the present disclosure are independent input reaction gas passages to achieve the adjustment of various applicable states. For example, when the first output part 13 is not needed, the reaction gas can be directly input to the third input passage 131 and the fourth input passage 132 together or to one of them to perform baking or oxygen blowing at the corresponding position of the second output part 13.

[0044] In some embodiments, the second output portion 13 has a plurality of first output passages 133 and a plurality of second output passages 134 , the plurality of first output passages 133 are in communication with the third input passage 131 , and the plurality of second output passages 134 are in communication with the fourth input passage 132 .

[0045] In this embodiment, the second output portion 13 has a plurality of first output passages 133 and a plurality of second output passages 134, so as to finely control the baking or oxygen blowing area. Among them, the plurality of first output passages 133 can be connected to the third input passage 131 separately or together. For example, the third input passage 131 is a plurality of independent flow channels, and the inlet is connected to the third input passage 131. Under the premise of fine operation, the plurality of third input passages 131 can be respectively provided with stop valves, and the output reaction gas is controlled by controlling the switch of the stop valve to achieve a fine operation range. It is also possible that the plurality of first output passages 133 are connected to the third input passage 131 together, and when the third input passage 131 inputs the reaction gas, the plurality of first output passages 133 simultaneously input the reaction gas. The plurality of second output passages 134 and the fourth input passage 132 are arranged as described above, and will not be repeated here.

[0046] In some embodiments, a circulating cooling portion 2 is further disposed inside the gun head body 1 . The cooling circulating portion 2 is disposed along the extension direction of the gun head body 1 . The cooling circulating portion 2 is used to reduce the temperature of the outer wall of the gun head body 1 .

[0047] In this embodiment, the cooling circulation unit 2 can be configured as a heat exchange tube, a heat dissipation tube group, etc.

[0048] In a specific embodiment of the present disclosure, the operation method of oxygen blowing and baking cold steel mode is as follows:

[0049] When oxygen blowing operation is required during the smelting of molten steel or when blowing oxygen to cool steel, click the smelting oxygen blowing mode, and control the main oxygen pipeline valve to open according to the PLC program, so that oxygen passes through the main oxygen pipeline and is then sprayed out from the first output part 12 and the second output part 13 on the gun head body 1 to realize the corresponding function.

[0050] When the smelting space is in the spare gap, it is necessary to bake the cold steel to increase the temperature of the vacuum chamber:

[0051] According to the actual situation on site, if only the vacuum chamber side wall is seriously sticky, it is necessary to remove the sticky slag on the vacuum chamber side wall and increase the temperature of the vacuum chamber side wall to reduce the sticky slag on the side wall when processing molten steel. Click the side wall baking mode, and control the third input passage 131 and the fourth input passage 132 of the second output part 13 according to the PLC program, that is, the oxygen pipeline and the gas pipeline are opened, and the gas and oxygen are mixed and burned, which has the effect of cooling the steel on the vacuum chamber side wall and increasing the vacuum chamber baking to increase the side wall temperature and reduce the sticky slag.

[0052] According to the actual situation on site, when the cold steel in the lower tank of the vacuum chamber is seriously sticky with slag and needs to be removed through the baking mode, click the main baking and melting cold steel mode, and the PLC program controls the opening of the first input passage 122 and the second input passage 123 corresponding to the first output part 12, that is, the main oxygen pipeline and the main gas pipeline valve, so that oxygen and gas are mixed and burned in the gas reaction part 121 to bake the cold steel in the bottom tank of the vacuum chamber, thereby achieving the effect of melting cold steel.

[0053] According to the actual situation on site, if the vacuum chamber as a whole has serious slag sticking and cold steel, the staff on duty clicks on the full baking and cold steel mode, and the PLC program controls to open all internal passages of the first output part 12 and the second output part 13 to input the reaction gas, so that oxygen and fuel gas are mixed and burned through the main and side sides to bake the cold steel in all directions of the vacuum chamber and remove the sticky slag.

[0054] Through operation control, multifunctional baking efficiency is achieved, and targeted baking and cold steel slag removal operations are carried out, which improves the baking efficiency of the vacuum chamber and the various options for oxygen blowing methods, with higher oxygen utilization, improved production efficiency and vacuum chamber temperature stability. The gas in the gas pipeline is mixed evenly and burned fully through a specific set ratio with oxygen.

[0055] In a second aspect of the present disclosure, a RH refining furnace top lance is provided, comprising the lance head of the above-mentioned RH top lance.

[0056] In a third aspect of the present disclosure, an RH refining furnace is provided, comprising the above-mentioned RH refining furnace top lance.

[0057] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0058] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0059] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A RH top gun head, characterized in that: The invention comprises a gun head body, wherein the gun head body has an input end, a first output part and a second output part, wherein the input end is used to input reaction gas to the first output part and the second output part, wherein: The first output portion is arranged on one surface of the gun head body, and the second output portion is arranged on a surface adjacent to the first output portion.

2. The RH top gun head according to claim 1, characterized in that: The first output portion includes a gas reaction portion, a first input passage, and a second input passage. The gas reaction portion is connected to the first output portion, and the first input passage and the second input passage are connected to the gas reaction portion.

3. The RH top gun head according to claim 2, characterized in that: Also includes a plurality of connecting passages, the connecting passages having an input port and an output port, the input port is connected to the second input passage, and the output port is connected to the gas reaction part; The second output part includes a third input passage and a fourth input passage, one end of the third input passage passes through the second input passage, and the other end opposite thereto is communicated with the second output part; The fourth input passage is in communication with the second output portion.

4. The RH top gun head according to claim 3, characterized in that: A guide portion is provided in the circumferential direction of the gas reaction portion. The guide portion is provided in the second input passage. The input port is provided at one end of the guide portion facing the flow direction of the reaction gas.

5. The lance head of the RH top lance according to any one of claims 1 to 4, characterized in that: The connection between the first input passage and the gas reaction part is configured with a neck.

6. The RH top gun head according to claim 1, characterized in that: The second output portion includes a third input passage and a fourth input passage, and the third input passage and the fourth input passage are respectively communicated with the second output portion.

7. The RH top gun head according to claim 3 or 6, characterized in that: The second output portion has a plurality of first output passages and a plurality of second output passages. The plurality of first output passages are communicated with the third input passage, and the plurality of second output passages are communicated with the fourth input passage.

8. The RH top gun head according to claim 1, characterized in that: A circulating cooling part is also arranged inside the gun head body. The cooling circulating part is arranged along the extension direction of the gun head body and is used to reduce the temperature of the outer wall of the gun head body.

9. A RH refining furnace top gun, characterized in that: A gun head comprising the RH top gun according to any one of claims 1 to 8.

10. An RH refining furnace, characterized in that: Includes the RH refining furnace top gun as described in claim 9.

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