A slag barrier plate for a side-blown melting furnace with a molten bath

Abstract

A slag barrier plate for a side-blown melting furnace with a melting bath, characterized in that it comprises: a slag barrier unit (1) with a plate body (11) for holding back molten slag; a heat dissipation unit (2) comprising: a cooling water jacket (21) extending through the interior of the plate body (11) to continuously introduce cooling medium into the plate body (11) to lower its temperature; a distributor arrangement (22) arranged at the end of the cooling water jacket (21) to introduce the cooling medium into the cooling water jacket (21).

Description

Technical area

[0001] The present utility model relates to the field of non-ferrous metal smelting technology, in particular a slag barrier plate for a side-blown smelting furnace with a molten bath. Technology in the background

[0002] During the side-blown smelting process of non-ferrous metals, high-temperature slag and high-temperature metal products layer up in the side-blown furnace. Regular removal of the molten slag and metal products ensures a safe and orderly melting process. Since the metal product enters the settling zone while the slag remains in the slag layer, a slag baffle plate must be installed to prevent slag from entering the settling zone. However, current research and design of slag baffle plates primarily focuses on those used in blast furnaces or converters in the steel industry.

[0003] Chinese utility model patent CN209052720U proposes a blast furnace slag baffle plate that uses a rectangular stainless steel plate with several oval holes evenly distributed across its body. Although this slag barrier increases structural strength, the stainless steel construction cannot operate stably for extended periods in side-blown melting furnaces. Furthermore, this barrier design exhibits poor adaptability to side-blown melting furnaces, complicating its installation and use in such furnaces.

[0004] The Chinese utility model patent CN211645306U effectively improves the structural strength of the slag impact body by providing reinforcing ribs on the outer surface of its main plate. This enhances its impact resistance and heat resistance. However, this technical solution remains limited to the converter steelmaking process and cannot be applied to side-blown melting furnaces.

[0005] It is evident that the design of existing slag barrier plates proves inadequate for use in side-blown melting furnaces. Furthermore, these plates cannot dissipate heat quickly during operation. Consequently, they are exposed to physicochemical corrosion and erosion by high-temperature molten slag and are highly susceptible to deformation, resulting in a short service life. Content of the utility model

[0006] The present utility model aims to provide a slag barrier plate for a side-blown melting furnace with a molten pool, which overcomes the problems of the prior art where existing slag barrier plates used in side-blown melting furnaces suffer from structural deficiencies and an inability to dissipate heat quickly during operation. This leads to deformation under the combined effects of physicochemical corrosion and high-temperature slag erosion, resulting in a short service life.

[0007] To achieve the aforementioned objective, the present utility model offers the following technical solution: A slag barrier plate for a side-blown melting furnace with a melting bath, consisting of: Slag barrier unit comprising a plate body for blocking molten slag; Heat dissipation unit comprising a cooling water jacket extending through the interior of the plate body to allow cooling medium to circulate continuously within the plate body for cooling purposes, and a distributor arrangement positioned at the end of the cooling water jacket to introduce cooling medium into the jacket.

[0008] Furthermore, the outer surface of the plate body has an abrasion-resistant, fire-resistant layer that encases the plate body; The interface between the outside of the plate body and the erosion-resistant refractory layer has a jagged, rough surface that serves to anchor the erosion-resistant refractory layer to the plate surface.

[0009] Furthermore, the plate body includes several sets of through-holes designed to accommodate cooling water jackets. These through-holes are arranged at equal intervals in a straight line, with each cooling water jacket being firmly inserted into its corresponding through-hole, thus creating a one-to-one correspondence between them.

[0010] Furthermore, the axis of the through holes is equidistant from both ends of the plate body, thus ensuring uniform cooling across both ends.

[0011] Furthermore, the distributor assembly includes: A liquid distribution block that is rigidly connected to one end of the cooling water jacket; A medium inlet port positioned at the inlet end of the liquid distribution block; And inlet holes formed within the liquid distribution block. The number of inlet holes corresponds to the number of cooling water jackets, with the outlets of the inlet holes corresponding one-to-one to the inlets of the cooling water jackets. This arrangement directs the cooling medium within the liquid distribution block through the inlet holes into the respective cooling water jackets.

[0012] Furthermore, a slag baffle plate for a side-blown melting furnace with a melt bath comprises: a melting furnace body, wherein the central area of ​​the furnace body contains a central slag chamber settling zone for the sedimentation of molten metal and slag; and wherein short melt stirring zones are arranged on both sides of the central slag chamber settling zone within the furnace body; A feed inlet located at the top of the furnace body directly above the short melting stirring zones to introduce molten materials into these zones; A molten metal outlet, arranged on one side of the furnace body and connected to the central slag chamber settling zone near the bottom of the furnace body, for draining molten metal that has settled in the lower part of the central slag chamber settling zone; A slag outlet, located on one side of the furnace body directly above the outlet for molten metal, for draining slag that has accumulated in the upper part of the central slag chamber settling zone.

[0013] Furthermore, the plate body is positioned between the central slag chamber settling zone and the short melting stir zone and is firmly connected to the inside of the melting furnace body. It serves to prevent molten slag from the upper part of the central slag chamber settling zone from entering the short melting stir zone.

[0014] Between the lower end of the plate body and the bottom of the melting furnace body there is a gap which facilitates the transition of the mixture of molten metal and slag from the lower part of the short melting stirring zone into the central slag chamber settling zone.

[0015] The cooling water jacket extends from the inside of the furnace body to its outside and is sealed between the cooling water jacket and the furnace body to prevent molten metal solution from escaping from the inside of the furnace body.

[0016] Compared to existing technologies, the present utility model has the following advantageous effects: The continuous supply of cooling medium to the liquid distribution block via the medium inlet diverts the cooling medium through inlet openings into separate cooling water jackets. This facilitates the dissipation of high temperatures from the plate body located outside the cooling water jackets by the continuously circulating cooling medium. Consequently, the plate body is cooled quickly and efficiently during slag retention. This design enables efficient heat dissipation during the operation of the slag retention plate, thus preventing thermal deformation and extending its service life.

[0017] This utility model utilizes a serrated, rough surface on the outer surface of the plate body for slag repellency. During the slag repellency process, the highly heated, molten slag, cooled by the medium, adheres to the serrated surface, forming a resistant, erosion-resistant layer. This significantly reduces physical erosion and chemical corrosion from molten materials on the plate's exterior and further improves thermal stability and impact resistance. Description of the attached drawings Fig. Figure 1 is a schematic diagram of the overall structure of the present utility model; Fig. Figure 2 is a front view in full section of the present utility model; Fig. Figure 3 is a diagram showing the fit relationship between the plate body and the erosion-resistant refractory layer of the present utility model; Fig. 4 is a diagram illustrating a specific implementation process of the present utility model A; Fig. Figure 5 shows process diagram B of the present utility model.

[0018] Designations in the figures: 1. Slag barrier unit; 2. Heat dissipation unit; 11. Plate body; 111. Through hole; 12. Erosion-resistant refractory layer; 13. Connecting surface; 21. Cooling water jacket; 22. Distributor assembly; 221. Liquid distribution block; 222. Liquid inlet opening; 223. Media inlet opening; 3. Melting furnace body; 31. Injection opening; 32. Metal outlet; 33. Slag outlet; 34. Short melting stirring zone; 35. Central slag chamber settling zone. Detailed description

[0019] The technical solutions of the embodiments of this utility model are now clearly and completely described with reference to the accompanying drawings. It is understood that the embodiments described here represent only a subset of the embodiments of this utility model, not all of them. All other embodiments that are obtained by those skilled in the art based on the embodiments of this utility model without any inventive work fall within the scope of protection of this utility model.

[0020] With reference to the Fig. 1-3 The present utility model offers a technical solution: A slag barrier plate for a side-blown melting furnace with melting bath, comprising: A slag barrier unit 1, including a plate body 11 for preventing the molten slag from escaping; A heat dissipation unit 2 comprising: a cooling water jacket 21 extending through the interior of the plate body 11 to continuously introduce cooling medium into the plate body 11 to lower its temperature; a distributor arrangement 22 positioned at the end of the cooling water jacket 21 to introduce the cooling medium into the cooling water jacket 21.

[0021] As an improvement, as in the Fig. 2-3 shown, the outer surface of the plate body 11 is provided with an erosion-resistant refractory layer 12 that encases the plate body 11; The connecting surface 13 between the outside of the plate body 11 and the erosion-resistant refractory layer 12 is designed as a toothed rough surface, which serves to fasten the erosion-resistant refractory layer 12 to the surface of the plate body 11.

[0022] Furthermore, the interior of the plate body 11, as shown in Fig. Figure 2 shows several sets of through-holes 111 designed to receive cooling water jackets 21. These through-holes 111 are arranged at equal intervals in a straight line. The cooling water jackets 21 are firmly inserted into the through-holes 111, with each cooling water jacket 21 corresponding one-to-one to a specific through-hole 111.

[0023] Furthermore, the axis of the through-hole 111 is equidistant from both ends of the plate body 11, thus enabling uniform cooling of both ends of the plate body 11.

[0024] As in Fig. As shown in 2, the distributor arrangement 22 includes: A liquid distribution block 221, which is rigidly connected to one end of the cooling water jacket 21; A media inlet opening 223, which is positioned at the inlet end of the liquid distribution block 221; The liquid inlet openings 222 are located within the liquid distribution block 221. The number of liquid inlet openings 222 corresponds to the number of cooling water jackets 21, and the liquid outlets of the liquid inlet openings 222 correspond one-to-one to the liquid inlet openings of the cooling water jackets 21, whereby the cooling medium is directed within the liquid distribution block 221 through the liquid inlet openings 222 into the respective cooling water jackets 21.

[0025] As an improvement, a slag baffle plate for a side-blown melting furnace with a melt bath also includes a melting furnace body 3. The central area of ​​the melting furnace body 3 houses a central slag chamber settling zone 35 for metal sedimentation. Short melt stirring zones 34 are positioned on both sides of the central slag chamber settling zone 35 within the melting furnace body 3.

[0026] The injection opening 31, which is located at the upper end of the melting furnace body 3 and directly above the short melting stirring zone 34, serves to inject the mixture of metal and slag into the short melting stirring zone 34.

[0027] The metal outlet 32, which is located on one side of the melting furnace body 3 and is connected to the central slag chamber settling zone 35 near the bottom of the melting furnace body 3, serves to drain metal liquid that has settled in the lower part of the central slag chamber settling zone 35.

[0028] A slag outlet 33, located on one side of the melting furnace body 3 directly above the metal outlet 32, serves to discharge the slag that has accumulated in the upper part of the settling zone 35 of the central slag chamber.

[0029] Furthermore, the plate body 11 is positioned between the central slag chamber settling zone 35 and the short melting stirring zone 34 and is firmly connected to the inside of the melting furnace body 3. It serves to prevent molten slag from the upper part of the central slag chamber settling zone 35 from entering the short melting stirring zone 34.

[0030] Between the lower end of the plate body 11 and the bottom of the melting furnace body 3 there is a gap which facilitates the transition of the mixture of molten metal and slag from the lower part of the short melting stirring zone 34 into the central slag chamber settling zone 35.

[0031] The cooling water jacket 21 extends from the inside of the melting furnace body 3 to its outside and is sealed between the cooling water jacket 21 and the melting furnace body 3 to prevent molten metal solution from escaping from the inside of the melting furnace body 3.

[0032] It should be added that the plate body 11 in this utility model uses copper with excellent heat dissipation properties. The outer surface of the plate body 11 undergoes a sandblasting roughening treatment to increase its surface roughness, thereby improving erosion resistance and facilitating the adhesion of refractory material to the outer surface of the plate body.

[0033] It should be noted that in the concrete implementation of this utility model, as in the Fig. As shown in Figures 4-5, the molten material is introduced through the injection opening 31 into the corresponding short stirring zone 34 within the furnace body 3. The material is melted in the short stirring zone 34, where vigorous stirring creates a mixture of molten metal and slag. This mixture flows through the gap between the plate body 11 and the furnace body 3 into the central slag settling zone 35. In the central slag settling zone 35, the slag and the molten metal separate into distinct layers. The molten slag in the upper layer is retained by the plate body 11, thus preventing its re-entry into the short stirring zone 34 and ensuring slag retention. The molten metal that settles at the bottom of the central slag settling zone 35 is drawn off via the molten metal outlet 32.Simultaneously, the slag within the central slag chamber settling zone 35 is drawn off through the slag outlet 33. This process ensures a complete separation of molten metal and slag and provides excellent slag containment performance.

[0034] As in the Fig. As shown in Figures 1-2, the plate body 11 is enveloped by molten slag during the slag barrier process, leading to elevated temperatures within the assembly that are difficult to dissipate quickly. At this point, cooling medium is continuously fed into the liquid distribution block 221 via the media inlet opening 223. After entering the distribution block, the cooling medium is diverted through the liquid inlet openings 222 into various cooling water jackets 21. This allows the high temperatures in the plate body 11, located on the outside of the cooling water jacket 21, to be continuously dissipated by the flowing cooling medium. Consequently, the plate body 11 is cooled quickly and efficiently during the slag barrier process. This enables efficient heat dissipation for the slag barrier plate during use, prevents thermal deformation, and thus extends its service life.

[0035] Furthermore, the present utility model, as described in the Fig. Figures 1 to 3 show a serrated, rough surface on the outside of the plate body 11 for slag retention. During this process, the plate body 11 is cooled by the cooling medium, causing the high-temperature molten slag to adhere to its serrated, rough surface and form an erosion-resistant refractory layer 12. Under the protection of the erosion-resistant refractory layer 12, physical erosion and chemical corrosion of the outside of the plate body 11 by the molten material are significantly reduced, further improving the thermal stability and impact resistance of the plate body 11.

[0036] Furthermore, the configurations of the melting furnace body 3 and the slag barrier unit 1 are merely schematic representations. Their shapes can be modified within the scope of the skilled person's knowledge, and the relative positioning between the slag barrier unit 1 and the melting furnace body 3 can also be changed.

[0037] It should be noted that in this document, relational terms such as "first" and "second" are used solely to distinguish one entity or process from another, without necessarily requiring or implying any actual relationship or order between those entities or processes. Furthermore, the terms "comprehensive," "inclusive," or other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or device comprising a set of elements includes not only those elements but also other elements not expressly listed or elements inherent in such process, method, article, or device.

[0038] Although embodiments of the present utility model have been illustrated and described, it will be clear to the person skilled in the art that numerous variations, modifications, substitutions, and changes can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the attached claims and their equivalents. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 209052720U

[0003] CN 211645306U

[0004]

Claims

[1] A slag barrier plate for a side-blown melting furnace with a melting bath, characterized by , that it includes: a slag barrier unit (1) with a plate body (11) for holding back molten slag; a heat dissipation unit (2) comprising: a cooling water jacket (21) extending through the interior of the plate body (11) to continuously introduce cooling medium into the plate body (11) to lower its temperature; a distributor arrangement (22) arranged at the end of the cooling water jacket (21) to introduce the cooling medium into the cooling water jacket (21). [2] A slag barrier plate for a side-blown melting furnace with a melt bath according to claim 1, characterized by , that: the outer surface of the plate body (11) is provided with an erosion-resistant refractory layer (12) to encase the plate body (11); the connecting surface (13) between the outside of the plate body (11) and the erosion-resistant refractory layer (12) is designed as a toothed rough surface to fasten the erosion-resistant refractory layer (12) to the surface of the plate body (11). [3] A slag barrier plate for a side-blown melting furnace with a melt bath according to claim 1, characterized by , that: The plate body (11) has several sets of through holes (111) inside for receiving cooling water jackets (21), wherein the through holes (111) are arranged at equal intervals in a straight line; the cooling water jackets (21) are firmly inserted into the through holes (111), each cooling water jacket (21) corresponding one to one with each through hole (111). [4] A slag barrier plate for a side-blown melting furnace with a melt bath according to claim 3, characterized by , that: the axial distance of the through holes (111) to both ends of the plate body (11) is the same, thus enabling uniform cooling of both ends of the plate body (11). [5] A slag barrier plate for a side-blown melting furnace with a melt bath according to claim 4, characterized by , that: the distributor arrangement (22) comprises: a liquid distribution block (221) which is rigidly connected to one end of the cooling water jacket (21); a media inlet opening (223) which is provided at the liquid inlet end of the liquid distribution block (221); a liquid inlet opening (222) provided within the liquid distribution block (221); the number of liquid inlet openings (222) corresponds to the number of cooling water jackets (21), and the liquid outlets of the liquid inlet openings (222) correspond one-to-one to the liquid inlet openings of the cooling water jackets (21); this arrangement directs the cooling medium within the liquid distribution block (221) through the liquid inlet openings (222) into the respective cooling water jackets (21). [6] A slag barrier plate for a side-blown melting furnace with a melting bath according to claim 1, characterized by , that it further includes: a melting furnace body (3), wherein the central region of the melting furnace body (3) is provided with a central slag chamber settling zone (35) for settling molten metal and slag; short melting stirring zones (34) arranged on both sides of the central slag chamber settling zone (35) within the melting furnace body (3); an injection opening (31) located at the upper end of the melting furnace body (3) directly above the short melting stirring zones (34) to introduce melt materials into the said zones; A metal outlet (32) is located on one side of the melting furnace body (3) and is connected to the bottom of the central slag chamber settling zone (35) next to the melting furnace body (3) and serves to drain the metal liquid that has settled in the lower part of the central slag chamber settling zone (35); a slag outlet (33) located on one side of the melting furnace body (3) directly above the metal outlet (32) for the discharge of slag that has settled in the upper part of the settling zone (35) of the central slag chamber. [7] A slag barrier plate for a side-blown melting furnace with a melt bath according to claim 6, characterized by , that: the plate body (11) is positioned between the central slag chamber settling zone (35) and the short melting stir zone (34) and is firmly connected to the inside of the melting furnace body (3) to prevent molten slag from the upper part of the central slag chamber settling zone (35) from entering the short melting stir zone (34); A gap is provided between the lower end of the plate body (11) and the bottom of the melting furnace body (3) to transfer the molten metal and slag mixture from the lower part of the short melting stirring zone (34) into the central slag chamber settling zone (35); The cooling water jacket (21) extends from the interior of the melting furnace body (3) to its exterior and is sealed between the cooling water jacket (21) and the melting furnace body (3) to prevent molten metal solution from escaping from the interior of the melting furnace body (3).

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