Oxygen-enriched side-blown converter

Abstract

The utility model provides an oxygen-enriched side-blown furnace, relates to the technical field of smelting equipment, and solves the technical problems of high metal loss and low product grade caused by serious heat loss and poor precipitation effect in the prior art. The device comprises a furnace body, a built-in front bed body and a communication channel, a bed molten pool is arranged at the bottom in the furnace body, a built-in front bed molten pool is arranged in the built-in front bed body, one end of the communication channel is communicated with one side wall of the bed molten pool, and the other end of the communication channel is communicated with the side wall of the built-in front bed molten pool. The smelting furnace is used for smelting non-ferrous metals, and the side wall of the current-bed molten pool and the side wall of the built-in front-bed molten pool are respectively communicated with the communication channel, so that more heat loss and impact stirring when metal mixed liquid flows from the current-bed molten pool to the built-in front-bed molten pool are avoided; further, the amount of copper (or nickel) contained in the slag in the precipitation process is reduced, the grade of the product is improved, the metal loss is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] This utility model relates to the field of smelting equipment technology, and in particular to an oxygen-enriched side-blown furnace. Background Technology

[0002] In my country, the smelting of copper and nickel in oxygen-enriched side-blown furnaces all employs an external front bed installed after the bridge in the main side-blown furnace, as shown in the attached figure. Figure 2 As shown, during the smelting process, the molten copper or nickel matte (or nickel matte) and molten slag fall into this bed and merge. After merging, the molten copper or nickel matte flows into the external front bed via a siphon bridge. The copper matte (or nickel matte) and slag are separated by precipitation in the external front bed. The molten slag, with its low density (approximately 3-3.5), floats on the upper part of the front bed and flows out through the slag overflow port of the front bed, forming water-quenched slag. The copper matte (or nickel matte), with its high density (approximately 5.5-6.5), settles at the bottom of the front bed. When the settled copper matte (or nickel matte) layer reaches a certain size, the operator discharges the copper matte (or nickel matte) from the copper matte (or nickel matte) discharge port at the bottom of the front bed. The resulting ingot is then sent to the next process (or sold externally) for smelting crude copper (or crude nickel).

[0003] In the conventional external forebed sedimentation process, when the matte (or nickel matte) in the molten metal fuses with the molten slag and enters the forebed through a siphon bridge, there is an impact and stirring process. This process results in a high heat loss of the molten metal, thus requiring a sedimentation period to settle the matte (or nickel matte). While the matte (or nickel matte) has settled to a certain size and is being discharged, the molten metal flowing out of the side-blown furnace continues to flow into the forebed, impacting and stirring the sedimentation effect. This sedimentation process results in a slag copper (or nickel) content that is 0.1% to 0.2% higher, reducing the grade of the finished matte (or nickel matte) by 2% to 3%, thus affecting the company's economic benefits. Utility Model Content

[0004] The purpose of this invention is to provide an oxygen-enriched side-blown furnace that solves the technical problems of severe heat loss, poor precipitation effect, resulting in large metal loss and low product grade in the prior art. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The oxygen-enriched side-blown furnace provided by this utility model includes a furnace body, an internal front bed body, and a connecting channel. The furnace body has a molten pool at the bottom, and the internal front bed body has an internal front bed molten pool. One end of the connecting channel is connected to a side wall of the molten pool and the other end is connected to a side wall of the internal front bed molten pool.

[0007] Preferably, the connecting channel is arranged horizontally.

[0008] Preferably, the top of the main bed molten pool and the top of the built-in front bed molten pool are both higher than the top of the connecting channel.

[0009] Preferably, a throat liquid seal is provided between the furnace body and the built-in front bed body, and the throat liquid seal, the side wall of the furnace body, and the side wall of the built-in front bed body form the communicating channel.

[0010] Preferably, the height of the slag melt outlet of the built-in forebed molten pool is flush with the throat liquid seal.

[0011] Preferably, the depth of the molten pool in this bed ranges from 300 mm to 400 mm.

[0012] Preferably, the depth of the built-in fore-bed molten pool ranges from 700 mm to 1000 mm.

[0013] Preferably, the area ratio of the built-in forebed molten pool to the area of ​​the main molten pool is 0.8:1.

[0014] The application employs the above technical solution and has at least the following beneficial effects:

[0015] An oxygen-enriched side-blown furnace includes a furnace body, an internal forebed, and a connecting channel. A molten pool is located at the bottom of the furnace body, and an internal forebed molten pool is located within the internal forebed. One end of the connecting channel is connected to a side wall of the molten pool, and the other end is connected to the side wall of the internal forebed molten pool. This direct connection to the side wall of the forebed molten pool prevents the molten metal mixture from experiencing a level difference and subsequent impact and agitation during its entry into the forebed molten pool. It also avoids heat loss during the descent. This smooth entry of the molten metal mixture into the forebed molten pool via the connecting channel results in high-temperature static sedimentation, minimizing heat loss and impact agitation. This reduces the copper (or nickel) content in the slag during the sedimentation process, improving product grade, reducing metal loss, and increasing economic efficiency.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of the oxygen-enriched side-blown furnace provided in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of an existing oxygen-enriched side-blown furnace.

[0020] In the diagram: 1. Furnace body; 2. Internal forebed body; 3. Connecting channel; 4. Molten pool of this bed; 5. Molten pool of the internal forebed body; 6. Throat liquid seal; 7. Slag liquid outlet; 8. Siphon bridge; 9. External forebed body; 10. External forebed molten pool. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] A specific embodiment of this utility model provides an oxygen-enriched side-blown furnace, as shown in the attached figure. Figure 1 As shown, it mainly includes a furnace body 1, an internal forebed body 2, and a connecting channel 3. The furnace body 1 has a molten pool 4 at its bottom, and the internal forebed body 2 has an internal forebed molten pool 5. The internal forebed body 2 and the furnace body 1 are an integral structure, with the internal forebed body 2 located on one side of the furnace body 1. Specifically, the internal forebed body 2 and the furnace body 1 can be designed as an integral structure to achieve their integration. One end of the connecting channel 3 is connected to one side wall of the molten pool 4, and the other end is connected to the side wall of the internal forebed molten pool 5, thus allowing the liquid in the molten pool 4 to... The molten metal enters the built-in forebed molten pool 5 directly after passing through the connecting channel 3, without any liquid level difference. At this time, the flow and sedimentation of the metal mixture are carried out simultaneously, which can reduce the sedimentation time to a certain extent. This avoids the large liquid level difference in the falling of the metal mixture in the existing siphon bridge technology. This method can avoid the heat loss and impact stirring problems that occur during the high liquid level difference falling process, thereby reducing the amount of copper (or nickel) in the slag in the sedimentation process, improving the product grade, reducing metal loss, and improving economic efficiency.

[0023] It should be noted that the smelting process is uninterrupted, so the built-in fore-bed molten pool 5 will always be at a high liquid level. Even after the liquid at the bottom is released after sedimentation to a certain extent, the liquid in the built-in fore-bed molten pool 5 will still be at a high liquid level, and the liquid entering the built-in fore-bed molten pool 5 later will not have a high liquid level difference.

[0024] In a specific embodiment of this application, the connecting channel 3 is arranged horizontally, thereby ensuring that the metal mixed solution maintains a slow flow rate as it flows from the main bed molten pool 4 into the built-in forebed molten pool 5, and remains in a sedimentation state during the flow process, so that the flow and sedimentation occur simultaneously, reducing the sedimentation time.

[0025] In a specific embodiment of this application, the top of the main bed molten pool 4 and the top of the built-in front bed molten pool 5 are both higher than the top of the connecting channel 3, and the highest liquid level of the built-in front bed molten pool 5 is higher than the highest liquid level of the main bed molten pool 4, while the lowest liquid level of the built-in front bed molten pool 5 is lower than the lowest liquid level of the main bed molten pool 4.

[0026] In some embodiments, a throat liquid seal 6 is provided between the furnace body 1 and the built-in front bed 2, and the throat liquid seal 6, the side wall of the furnace body 1 and the side wall of the built-in front bed 2 form a communicating channel 3.

[0027] Specifically, the height of the slag liquid outlet 7 of the built-in forebed molten pool 5 is flush with the throat liquid seal 6.

[0028] In some embodiments, the depth of the molten pool 4 in this bed ranges from 300 mm to 400 mm. Specifically, the depth of the molten pool 4 can be 320 mm, 330 mm, 340 mm, 350 mm, 360 mm, 370 mm, 380 mm, 390 mm, etc., and its specific dimensions can be set according to actual production conditions.

[0029] In some embodiments, the depth of the built-in fore-bed molten pool 5 ranges from 700 mm to 1000 mm. Specifically, the depth of the built-in fore-bed molten pool 5 can be 700 mm, 800 mm, 900 mm, 1000 mm, etc., and its specific dimensions can be set according to actual production conditions.

[0030] In some embodiments, the area ratio of the built-in forebed molten pool 5 to the area of ​​the main molten pool 4 is 0.8:1.

[0031] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An oxygen-enriched side-blown furnace, characterized in that, It includes a furnace body, an internal forebed body, and a connecting channel. The furnace body has a molten pool at its bottom, and the internal forebed body has an internal forebed molten pool. One end of the connecting channel is connected to a side wall of the molten pool, and the other end is connected to a side wall of the internal forebed molten pool.

2. The oxygen-enriched side-blown converter according to claim 1, characterized in that The connecting channel is arranged horizontally.

3. The oxygen-enriched side-blown furnace according to claim 2, characterized in that, The top of the main bed molten pool and the top of the built-in front bed molten pool are both higher than the top of the connecting channel.

4. The oxygen-enriched side-blown furnace according to claim 3, characterized in that A throat-mouth liquid seal is provided between the furnace body and the built-in front bed body, and the throat-mouth liquid seal, the side wall of the furnace body, and the side wall of the built-in front bed body form the communicating channel.

5. The oxygen-enriched side-blown converter according to claim 4, characterized in that The height of the slag molten pool in the built-in forebed is flush with the throat liquid seal.

6. The oxygen-enriched side-blown furnace according to claim 1, characterized in that, The depth of the molten pool in this bed ranges from 300 mm to 400 mm.

7. The oxygen-enriched side-blown furnace according to claim 1, characterized in that, The depth of the built-in fore-bed molten pool ranges from 700 mm to 1000 mm.

8. The oxygen-enriched side-blown furnace according to claim 1, characterized in that, The area ratio of the built-in forebed molten pool to the area of ​​the main molten pool is 0.8:1.

Images