Furnace bottom structure of smelting furnace and smelting furnace

Abstract

According to the furnace bottom structure of the smelting furnace, a heat preservation layer is arranged on the top face of a furnace body steel shell, and a working layer is arranged on the top face of the heat preservation layer; the working layer is composed of furnace bottom prefabricated parts and anti-seepage castable, and the space between the adjacent furnace bottom prefabricated parts is filled with the anti-seepage castable. A plurality of furnace bottom prefabricated parts with the centers located on the same straight line form a prefabricated part set, the multiple prefabricated part sets are arranged in parallel, a same-set gap is reserved between every two adjacent furnace bottom prefabricated parts in the same set, and the same-set gap in any prefabricated part set and the same-set gap in the adjacent prefabricated part set are distributed in a staggered mode. A circle of contraction guide groove is formed in the peripheral side of the furnace bottom prefabricated part in the horizontal direction. The mode that the working layer is formed by laying the furnace bottom prefabricated part and the anti-seepage castable is adopted, tedious steps and long working hours of cast-in-place forming of the furnace bottom are avoided, and the sealing performance and the anti-seepage performance of the furnace bottom structure can be guaranteed; and the same group of gaps in the adjacent prefabricated part groups are distributed in a staggered manner, so that the mutual influence of the adjacent furnace bottom prefabricated parts is reduced.

Description

Technical Field

[0001] The utility model relates to the field of smelting furnace forming, in particular to a furnace bottom structure of a smelting furnace and the smelting furnace. Background Art

[0002] The melting furnace is a new type of high-efficiency and energy-saving furnace developed according to the aluminum smelting process. It can well meet the requirements of the aluminum smelting process: strict requirements on alloy composition, discontinuous production, large single furnace capacity, etc., and achieves the effects of reducing consumption, reducing burnout, improving product quality, reducing labor intensity, improving working conditions and improving production efficiency. It is suitable for intermittent operation and smelting with a large amount of alloy and return materials.

[0003] The furnace bottom of existing smelting furnaces is cast by pouring, which requires on-site steps such as cutting wood blocks, setting up formwork, pouring material into the mold, waiting for the castable to solidify, removing the wooden mold, and pouring anti-seepage material into the gaps. These steps are tedious and time-consuming. Furthermore, due to differences in pouring methods between workers and construction environments, the furnace bottom may have structural unevenness at different locations, which can lead to instability in the furnace bottom and even the entire furnace. Utility Model Content

[0004] In response to the problems raised in the background technology, the purpose of this utility model is to propose a furnace bottom structure for a smelting furnace, which solves the problem that the existing smelting furnace bottom casting and molding requires on-site mold support, pouring and waiting for molding, and demolding, which is time-consuming, has low precision and unstable structure.

[0005] The utility model also provides a smelting furnace, which comprises the above-mentioned smelting furnace bottom.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A furnace bottom structure of a smelting furnace comprises a working layer, a thermal insulation layer and a furnace body steel shell, wherein the thermal insulation layer is arranged on the top surface of the furnace body steel shell, and the working layer is arranged on the top surface of the thermal insulation layer;

[0008] The working layer is composed of furnace bottom prefabricated parts and anti-seepage castables, a plurality of the furnace bottom prefabricated parts are laid on the top surface of the insulation layer at intervals, and the anti-seepage castables are filled between adjacent furnace bottom prefabricated parts;

[0009] A plurality of furnace bottom prefabricated parts whose centers are located in the same straight line constitute a group of prefabricated parts. Several groups of prefabricated parts are arranged in parallel with each other. A same-group gap is left between two adjacent furnace bottom prefabricated parts in the same group. The same-group gaps in any prefabricated part group are staggered with the same-group gaps in the adjacent prefabricated part group.

[0010] A circle of shrinkage guide grooves is provided on the outer peripheral side of the furnace bottom prefabricated component in the horizontal direction.

[0011] Preferably, the distance between the gaps in the same group is a spacing distance D, the relative distance between the gaps in the same group of adjacent preform groups is a staggered distance S, and the ratio of the spacing distance D to the staggered distance S is in the range of 1 / 2-1.

[0012] Preferably, an impermeable material casting interval is formed between adjacent furnace bottom prefabricated parts, between adjacent prefabricated part groups, and between the furnace bottom prefabricated parts and the side walls around the smelting furnace, and the impermeable castable is arranged in the impermeable material casting interval.

[0013] Preferably, the furnace bottom prefabricated member is a rectangular structure, comprising a working surface, a supporting surface, two end surfaces and two side surfaces, wherein the working surface is located at the top of the furnace bottom prefabricated member, the supporting surface is located at the bottom of the furnace bottom prefabricated member, the two end surfaces are parallel to each other, and the two end surfaces are respectively located at the front and rear ends of the furnace bottom prefabricated member, and the two side surfaces are parallel to each other, and the two side surfaces are respectively located at the left and right sides of the furnace bottom prefabricated member;

[0014] The contraction guide groove is arranged at the middle of the end surface and the side surface.

[0015] Preferably, the vertical cross-section of the contraction guide groove is trapezoidal, the top wall of the contraction guide groove is inclined from top to bottom and from outside to inside, the bottom wall of the contraction guide groove is inclined from top to bottom and from inside to outside, the upper and lower ends of the groove side walls of the contraction guide groove are respectively connected to the groove top wall and the groove bottom wall, and the groove side walls are respectively perpendicular to the working surface and the support surface.

[0016] Preferably, the ratio h of the slot opening height h of the contraction guide slot to the spacing distance D is: D=1 / 3-1 / 2.

[0017] Preferably, the angle α between the top wall of the groove and the horizontal line is 10°-45°;

[0018] The angle β between the bottom wall of the groove and the horizontal line is 10°-20°.

[0019] Preferably, the height H of the furnace bottom prefabricated part is 200 mm-300 mm, the length and width of the furnace bottom prefabricated part are 400 mm-900 mm, and the distance D between the pouring intervals of the anti-seepage material is 150 mm-250 mm.

[0020] Preferably, the thermal insulation layer consists of thermal insulation cotton boards and thermal insulation bricks.

[0021] A smelting furnace, comprising the above-mentioned smelting furnace bottom structure;

[0022] The side wall of the furnace bottom structure is closely connected to the side wall of the smelting furnace.

[0023] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0024] By using prefabricated furnace bottom parts and laying out impermeable castables to form the working layer, the tedious steps and long labor hours of on-site casting of the furnace bottom are avoided, while ensuring the sealing and impermeability of the furnace bottom structure. Shrinkage guide grooves on the periphery of the prefabricated furnace bottom parts effectively address thermal expansion and contraction, reducing stress generated by temperature fluctuations in the prefabricated furnace bottom parts and thus improving the stability of the furnace bottom structure. The interaction of these structural features solves the existing problems of uneven furnace bottom structures and poor overall stability caused by differences in on-site laying processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of one embodiment of the bottom structure of a smelting furnace;

[0026] Figure 2 It is a structural schematic diagram of one embodiment of the bottom structure of a smelting furnace;

[0027] Figure 3 1 is a structural diagram of an embodiment of a furnace bottom prefabricated component;

[0028] Figure 4 is a side view of an embodiment of a furnace bottom preform;

[0029] Figure 5 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0030] Among them: working layer 1, furnace bottom prefabricated part 10, prefabricated part group 01, gap 011 in the same group, working surface 11, supporting surface 12, end surface 13, side surface 14, shrinkage guide groove 100, groove top wall 101, groove bottom wall 102, groove side wall 103, insulation layer 2, furnace body steel shell 3, anti-seepage castable 4 and anti-seepage material casting spacer 40. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features being referred to. Thus, a feature identified as "first," "second," and "third" may explicitly or implicitly include one or more of the features.

[0034] It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0035] The following is combined with Figures 1 to 5 The technical solution of the utility model is further illustrated through specific implementation methods.

[0036] refer to Figures 1 to 4 As shown, this solution provides a furnace bottom structure of a smelting furnace, comprising a working layer 1, a thermal insulation layer 2 and a furnace steel shell 3, wherein the thermal insulation layer 2 is provided on the top surface of the furnace steel shell 3, and the working layer 1 is provided on the top surface of the thermal insulation layer 2;

[0037] The working layer 1 is composed of furnace bottom prefabricated parts 10 and anti-seepage castables 4. Several furnace bottom prefabricated parts 10 are laid on the top surface of the insulation layer 2 at intervals, and the anti-seepage castables 4 are filled between adjacent furnace bottom prefabricated parts 10.

[0038] A plurality of furnace bottom prefabricated parts 10 whose centers are located in the same straight line constitute a prefabricated part group 01. Several groups of the prefabricated part groups 01 are arranged parallel to each other. A same-group gap 011 is left between two adjacent furnace bottom prefabricated parts 10 in the same group. The same-group gap 011 in any prefabricated part group 01 is staggered with the same-group gap 011 in the adjacent prefabricated part group 01.

[0039] A circle of shrinkage guide grooves 100 is provided on the outer circumference of the furnace bottom preform 10 along the horizontal direction.

[0040] By using furnace bottom prefabricated parts 10 and impermeable castable material 4 to form the working layer 1, the tedious steps and long labor hours of on-site casting of the furnace bottom are avoided, while ensuring the sealing and impermeability of the furnace bottom structure. The shrinkage guide grooves 100 on the outer periphery of the furnace bottom prefabricated parts can effectively cope with thermal expansion and contraction, reducing the stress generated by temperature changes in the furnace bottom prefabricated parts 10, thereby improving the stability of the furnace bottom structure. The staggered arrangement of the same-group gaps 011 within adjacent prefabricated parts groups reduces the mutual influence of thermal expansion and contraction between adjacent prefabricated parts groups 01, thereby improving the stability of the working layer. The interaction of these structural features solves the problem of uneven furnace bottom structure and poor overall stability caused by differences in on-site laying processes in the prior art.

[0041] Specifically, the furnace body steel shell 3 serves as the bottom layer of the smelting furnace bottom structure, and the insulation layer 2 is provided on the top surface (equivalent to the inner side) of the furnace body steel shell 3. A number of furnace bottom prefabricated parts 10 are laid on the top surface of the insulation layer 2, and an anti-seepage castable 4 is filled between the furnace bottom prefabricated parts 10 to form a working layer 1, so that the working layer 1 is flat as a whole and has a stable structure. The furnace body steel shell 3 can ensure the mechanical strength of the insulation layer 2 and provide basic hardness for the smelting furnace bottom structure. The insulation layer 2 can provide a key barrier between the high-temperature environment inside the smelting furnace and the external environment; the outer side (bottom) of the insulation layer 2 is set close to the furnace body steel shell 3, and the inner side of the insulation layer 2 is directly connected to the working layer 1 or indirectly connected through other connecting structures or castables. In a high-temperature environment, if there are no effective insulation measures, the external structure of the smelting furnace (such as the furnace steel shell 3) may be deformed or damaged due to long-term high-temperature baking, and even affect the safety of the overall structure; the insulation layer 2 not only reduces the loss of heat, but also reduces the temperature of the environment around the smelting furnace, providing a more comfortable working environment for operators and reducing safety hazards and health risks caused by high temperatures. The presence of the insulation layer 2 slows down the direct impact of high temperature on the external structure and extends the service life of the smelting furnace. The furnace bottom prefabricated parts 10 have been laid along the extension direction of the insulation layer 2 to form the prototype of the working layer 1. After the furnace bottom prefabricated parts 10 are laid, the anti-seepage castable 4 is filled into the gaps between the furnace bottom prefabricated parts 10 to form a tight connection between the anti-seepage castable 4 and the furnace bottom prefabricated parts 10 to form the working layer 1, so that the overall structure of the working layer 1 is completed and the structure is stable. The furnace bottom preform 10 is provided with a circle of inwardly recessed contraction grooves 100 along its outer perimeter. These grooves provide a buffer space when the furnace bottom preform 10 expands due to heat, reducing pressure and thermal stress within the preform 10. Furthermore, the staggered arrangement of gaps 011 within adjacent preform groups reduces the mutual impact between adjacent preforms 10, preventing cracking or deformation due to thermal expansion, thereby improving the overall stability and service life of the furnace bottom structure. Furthermore, the design of the contraction grooves 100 reduces the possibility of aluminum leakage from the furnace bottom. If the furnace bottom preform 10 were not provided with contraction grooves 100 and instead had edges perpendicular to the working layer surface, the molten aluminum would flow directly along the vertical plane of the edges to the insulation layer 2 at the bottom of the furnace bottom preform 10, potentially eroding the furnace steel shell 3 and damaging the furnace bottom structure. However, the provision of contraction grooves 100 extends the flow path of the molten aluminum, allowing the molten aluminum to gradually solidify during this flow, thus preventing aluminum leakage from the bottom of the furnace bottom structure.

[0042] It is worth noting that the above-mentioned furnace bottom prefabricated parts 10 are made from steel molds. After the furnace bottom prefabricated parts 10 are prepared, they can be brought to the construction site for assembly and installation of the furnace bottom of the smelting furnace. Alternatively, the steel molds can be brought to the construction site and, as needed, the molds can be laid before casting and molding. The first method specifically involves transporting the solidified furnace bottom prefabricated parts 10 to the construction site, arranging and placing the furnace bottom prefabricated parts 10 on the insulation layer 2 according to the design drawings, and then filling the gaps between adjacent furnace bottom prefabricated parts 10 with anti-seepage castables 4 to level the working layer 1. The furnace bottom structure is then installed after the anti-seepage castables 4 solidify. The second method involves placing the steel mold according to the design drawings on the insulation layer 2, pouring the material into the mold, and then removing and recycling the mold after the material solidifies. Similarly, after removing the mold, the gaps between adjacent furnace bottom prefabricated parts 10 are filled with anti-seepage castable 4 until the working layer 1 is flush. The furnace bottom structure is then installed after the anti-seepage castable 4 solidifies. Both methods are more efficient than the complex and time-consuming on-site steps of supporting the mold in sections, pouring the material, waiting for solidification, and then removing the mold. While the latter method also requires the on-site casting of the furnace bottom prefabricated components after placing a steel mold, it eliminates the need for on-site wood cutting and mold assembly, improving efficiency and addressing the large errors between different castings. Furthermore, the furnace bottom prefabricated components 10, cast on-site using the steel mold, are directly connected and fixed to the insulation layer 2 on their bottom surface, further ensuring the stability of the working layer 1. This guaranteed quality and uniform and stable structure of the working layer 1 improve thermal efficiency during aluminum smelting, reducing heat loss and thereby increasing smelting efficiency. Furthermore, the stable furnace bottom structure helps maintain uniform temperature distribution within the furnace, improving product quality.

[0043] Furthermore, the distance between the gaps 011 in the same group is a spacing distance D, the relative distance between the gaps 011 in the same group of adjacent preform groups 01 is a staggered distance S, and the ratio of the spacing distance D to the staggered distance S is in the range of 1 / 2-1.

[0044] By setting the staggered distance S of the same-group gaps 011 of the two groups of prefabricated component groups 01 to be greater than or equal to the spacing distance D of the same-group gaps, it is ensured that there are criss-cross gaps between different furnace bottom prefabricated components 10, thereby reducing the mutual influence of thermal expansion and contraction between adjacent prefabricated component groups 01 and improving the stability of the working layer.

[0045] Furthermore, an impermeable material casting gap 40 is formed between adjacent furnace bottom prefabricated parts 10 , between adjacent prefabricated part groups 01 , and between the furnace bottom prefabricated parts 10 and the side walls around the smelting furnace, and the impermeable castable material 4 is arranged in the impermeable material casting gap 40 .

[0046] By forming impermeable castable spaces 40 between adjacent furnace bottom prefabricated members 10, between adjacent prefabricated member groups 01, and between the furnace bottom prefabricated members 10 and the sidewalls of the smelting furnace, and filling these spaces with impermeable castable material 4, molten metal or other substances can be further prevented from leaking to the bottom of the working layer 1. This design not only improves the sealing performance of the furnace bottom but also enhances the stability and durability of its overall structure. The impermeable castable material 4 not only prevents penetration but also withstands high temperatures and chemical corrosion, thereby extending the service life of the furnace bottom.

[0047] Furthermore, the furnace bottom preform 10 is a rectangular structure, comprising a working surface 11, a supporting surface 12, two end surfaces 13, and two side surfaces 14. The working surface 11 is located at the top of the furnace bottom preform 10, the supporting surface 12 is located at the bottom of the furnace bottom preform 10, the two end surfaces 13 are parallel to each other, and the two end surfaces 13 are respectively located at the front and rear ends of the furnace bottom preform 10, and the two side surfaces 14 are parallel to each other, and the two side surfaces 14 are respectively located on the left and right sides of the furnace bottom preform 10.

[0048] The shrinkage guide groove 100 is provided at the middle portion of the end surface 13 and the side surface 14 .

[0049] The furnace floor prefabricated member 10 adopts a rectangular structure, ensuring its geometric stability and installation precision. It features a working surface 11 at the top, a supporting surface 12 at the bottom, parallel end surfaces 13 at the front and rear ends, and parallel side surfaces 14 on the left and right sides. This ensures the basic shape and dimensions of the furnace floor prefabricated member 10, facilitating installation to form the working layer 1. The parallelism of the working surface 11 and supporting surfaces 12 ensures the stability of the furnace floor prefabricated member 10 during installation. Contraction guides 100 are located midway between the end surfaces 13 and side surfaces 14. This design effectively relieves stress during thermal expansion, preventing deformation or cracking. Specifically, the front view, rear view, left view and right view of the furnace bottom prefabricated part 10 are designed in the shape of an "I", which increases the bending strength and rigidity of the furnace bottom prefabricated part 10, making it more adaptable to working requirements in a high-temperature environment. At the same time, the furnace bottom prefabricated part 10 has good support and stability in all directions, further improving the service life and reliability of the furnace bottom prefabricated part 10.

[0050] Furthermore, the vertical cross-section of the contraction guide groove 100 is trapezoidal, the groove top wall 101 of the contraction guide groove 100 is inclined from top to bottom and from outside to inside, the groove bottom wall 102 of the contraction guide groove 100 is inclined from top to bottom and from inside to outside, the upper and lower ends of the groove side wall 103 of the contraction guide groove 100 are respectively connected to the groove top wall 101 and the groove bottom wall 102, and the groove side wall 103 is respectively perpendicular to the working surface 11 and the support surface 12.

[0051] The vertical cross-section of the shrinkage guide groove 100 is designed to be trapezoidal, with the groove top wall 101 tilted from top to bottom and from outside to inside, while the groove bottom wall 102 tilted from top to bottom and from inside to outside. This allows the furnace bottom prefabricated part 10 to generate an inward extrusion force when subjected to vertical pressure, thereby enhancing the structural strength of the furnace bottom prefabricated part 10; at the same time, it can effectively disperse and relieve thermal stress, preventing the furnace bottom prefabricated part from cracking or deforming due to thermal expansion and contraction in a high-temperature environment.

[0052] The inclined top and bottom walls 101, 102 of the trough effectively disperse and alleviate thermal stress, preventing cracks or deformation in the furnace bottom preform 10 due to thermal expansion and contraction in high-temperature environments. The perpendicular orientation of the trough sidewalls 103 relative to the working surface 11 and support surface 12 ensures that stress is evenly distributed within the contraction guide trough 100 when subjected to force, further enhancing the stability and durability of the furnace bottom preform 10. The combined effects of these technical features address the problem of structural damage to the furnace bottom preform caused by thermal stress during use, significantly improving its service life and stability.

[0053] In addition, the curved paths of the top wall 101, the side walls 103 and the bottom wall 102 of the contraction guide groove 100 further increase the flow path of the leaking molten aluminum, providing a longer time for the molten aluminum to solidify, and preventing the molten aluminum from flowing vertically from the working surface 11 through the end surface 13 or the side surface 14 to the supporting surface, causing the risk of molten aluminum leakage.

[0054] Furthermore, the ratio h of the slot opening height h of the shrinkage guide slot 100 to the spacing distance D is: D=1 / 3-1 / 2.

[0055] By designing a reasonable ratio of the slot opening height h to the spacing distance D of the shrinkage guide groove 100, which is equivalent to limiting the structure of the anti-seepage castable 4, the working layer 1 composed of the furnace bottom prefabricated part 10 and the anti-seepage castable 4 can be improved in terms of its ability to resist thermal stress and mechanical stress in a high temperature environment, thereby reducing structural damage caused by thermal expansion and contraction.

[0056] Furthermore, the angle α between the groove top wall 101 and the horizontal line is 10°-45°;

[0057] The angle β between the bottom wall 102 and the horizontal line is 10°-20°.

[0058] By designing the angle α between the trough top wall 101 and the horizontal line to be between 10° and 45°, the stress concentration caused by thermal expansion and contraction of the furnace bottom preform 10 during use can be effectively dispersed and alleviated. This allows the trough top wall 101 to better adapt to deformation during thermal expansion and contraction, thereby reducing stress concentration, preventing cracking or damage to the furnace bottom preform, and improving its service life and stability. Furthermore, the inclination angle of the trough top wall 101 can influence the flow path and flow rate of leaking molten aluminum, thereby solidifying the molten aluminum during its flow and resolving the problem of molten aluminum leakage from the smelting furnace bottom.

[0059] By designing the angle β between the bottom wall 102 and the horizontal line to be between 10° and 20°, the stress concentration caused by thermal expansion and contraction of the furnace bottom preform 10 during use can be effectively dispersed and alleviated. This allows the bottom wall 102 to better adapt to deformation during thermal expansion and contraction, thereby reducing stress concentration, preventing cracking or damage to the furnace bottom preform, and improving its service life and stability. Furthermore, the bottom wall 102, located at the bottom of the trough, has a relatively gentle inclination angle, which can slow the flow rate of the molten aluminum, allowing the molten aluminum to be stored as much as possible within the contraction guide groove 100 rather than flowing to the bottom. This provides more time for the molten aluminum to solidify and solves the problem of molten aluminum leakage from the smelting furnace bottom.

[0060] Furthermore, the height H of the furnace bottom prefabricated part 10 is 200 mm to 300 mm, the length and width of the furnace bottom prefabricated part 10 are 400 mm to 900 mm, and the distance D of the anti-seepage material pouring interval 40 is 150 mm to 250 mm.

[0061] The specific design ranges for the height H, length, and width of the furnace bottom prefabricated member 10 ensure sufficient strength and stability during high-temperature smelting. The 40-degree interval D between the impermeable material pours enhances the bottom's impermeability, preventing leakage of molten material during smelting. These specific dimensions ensure the furnace bottom maintains structural integrity in high-temperature environments, extending its service life and improving smelting efficiency.

[0062] Furthermore, the thermal insulation layer 2 is composed of thermal insulation cotton boards and thermal insulation bricks.

[0063] The insulation bricks are resistant to high temperatures; the insulation cotton board is mainly a high-efficiency insulation material with the characteristics of light weight, oxidation resistance, low thermal conductivity, good softness, corrosion resistance, small heat capacity and sound insulation, and is very suitable as an insulation layer 2.

[0064] A smelting furnace, comprising the above-mentioned smelting furnace bottom structure;

[0065] The side wall of the furnace bottom structure is closely connected to the side wall of the smelting furnace.

[0066] The bottom of the smelting furnace adopts a multi-layer structure, including a working layer 1, an insulation layer 2 and a furnace body steel 3. This structure can effectively insulate and reduce heat loss. The working layer 1 is composed of a number of furnace bottom prefabricated parts 10 and an anti-seepage castable 4, which can prevent molten metal from penetrating and protect the furnace bottom. The outer peripheral side of the furnace bottom prefabricated part 10 is provided with a shrinkage guide groove 100, which can absorb and relieve thermal stress at high temperatures and prevent the furnace bottom prefabricated part 10 from cracking. Specifically, when the furnace bottom structure is laid in the smelting furnace, during the pouring and molding process of the anti-seepage castable 4, the gaps arranged vertically and horizontally by the anti-seepage castable 4 flow and fill, and the solidified anti-seepage castable 4 is tightly connected to the side wall of the smelting furnace. The furnace bottom of the smelting furnace of the utility model can maintain good stability and durability during the high-temperature smelting process, extend the service life, and reduce maintenance costs.

[0067] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A furnace bottom structure of a smelting furnace, characterized in that: It comprises a working layer, a heat-insulating layer and a furnace body steel shell, wherein the heat-insulating layer is arranged on the top surface of the furnace body steel shell, and the working layer is arranged on the top surface of the heat-insulating layer; The working layer is composed of furnace bottom prefabricated parts and anti-seepage castables, a plurality of the furnace bottom prefabricated parts are laid on the top surface of the insulation layer at intervals, and the anti-seepage castables are filled between adjacent furnace bottom prefabricated parts; A plurality of furnace bottom prefabricated parts whose centers are located in the same straight line constitute a group of prefabricated parts. Several groups of prefabricated parts are arranged in parallel with each other. A same-group gap is left between two adjacent furnace bottom prefabricated parts in the same group. The same-group gaps in any prefabricated part group are staggered with the same-group gaps in the adjacent prefabricated part group. A circle of shrinkage guide grooves is provided on the outer peripheral side of the furnace bottom prefabricated component in the horizontal direction.

2. The bottom structure of a smelting furnace according to claim 1, characterized in that: The distance between the gaps in the same group is a spacing distance D, the relative distance between the gaps in the same group of adjacent preform groups is a staggered distance S, and the ratio of the spacing distance D to the staggered distance S is in the range of 1 / 2-1.

3. The bottom structure of a smelting furnace according to claim 2, characterized in that: An impermeable material casting interval is formed between adjacent furnace bottom prefabricated parts, between adjacent prefabricated part groups, and between the furnace bottom prefabricated parts and the side walls around the smelting furnace. The impermeable castable is arranged in the impermeable material casting interval.

4. The bottom structure of a smelting furnace according to claim 3, characterized in that: The furnace bottom prefabricated member is a rectangular structure, comprising a working surface, a supporting surface, two end surfaces, and two side surfaces. The working surface is located at the top of the furnace bottom prefabricated member, the supporting surface is located at the bottom of the furnace bottom prefabricated member, the two end surfaces are parallel to each other, and the two end surfaces are respectively located at the front and rear ends of the furnace bottom prefabricated member. The two side surfaces are parallel to each other, and the two side surfaces are respectively located at the left and right sides of the furnace bottom prefabricated member. The contraction guide groove is arranged at the middle of the end surface and the side surface.

5. The bottom structure of a smelting furnace according to claim 4, characterized in that: The vertical cross-section of the contraction guide groove is trapezoidal, the top wall of the contraction guide groove is inclined from top to bottom and from outside to inside, the bottom wall of the contraction guide groove is inclined from top to bottom and from inside to outside, the upper and lower ends of the groove side walls of the contraction guide groove are respectively connected to the groove top wall and the groove bottom wall, and the groove side walls are respectively perpendicular to the working surface and the supporting surface.

6. The bottom structure of a smelting furnace according to claim 5, characterized in that: The ratio h of the slot opening height h of the contraction guide slot to the spacing distance D is: D=1 / 3-1 / 2.

7. The bottom structure of a smelting furnace according to claim 6, characterized in that: The angle α between the top wall of the groove and the horizontal line is 10°-45°; The angle β between the bottom wall of the groove and the horizontal line is 10°-20°.

8. The bottom structure of a smelting furnace according to claim 7, characterized in that: The height H of the furnace bottom prefabricated part is 200mm-300mm, the length and width of the furnace bottom prefabricated part are 400mm-900mm, and the distance D between the pouring intervals of the anti-seepage material is 150mm-250mm.

9. A furnace bottom structure of a smelting furnace according to any one of claims 1 to 8, characterized in that: The heat-insulating layer consists of a heat-insulating cotton board and a heat-insulating brick body.

10. A smelting furnace, characterized in that: A furnace bottom structure comprising a smelting furnace according to any one of claims 1 to 9; The side wall of the furnace bottom structure is closely connected to the side wall of the smelting furnace.

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