Dust hood for casting smelting furnace and smelting furnace

Abstract

The dust hood comprises a cover body and a heat insulation assembly, a suction cavity and a suction opening are formed in the cover body, the suction opening is formed in the suction cavity and used for being connected with a suction fan, and the heat insulation assembly comprises a fireproof plate, a fireproof ring and a first connecting piece. The fireproof plate is connected to the inner top wall of the cover body, the fireproof ring is arranged on the periphery of the lower end of the fireproof plate in an adjacent mode, one end of the first connecting piece is connected to the fireproof ring, and the other end of the first connecting piece is detachably connected to the fireproof plate. Therefore, when low-temperature air enters the dust removal cover, heat of the smelting furnace does not make contact with the low-temperature air, the heat of the smelting furnace is prevented from being sucked away, heat loss is greatly reduced, and the smelting cost is reduced; meanwhile, when low-temperature air sucked into the dust removal cover flows on the outer side face of the fire blocking ring, a certain cooling effect can be achieved on the fire blocking ring, and therefore the service life of the fire blocking ring can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of smelting furnace technology, and in particular to dust hoods for casting smelting furnaces. Background Technology

[0002] A medium-frequency induction furnace is a power supply device that converts 50Hz AC power into medium-frequency (300Hz to 1000Hz) power. It rectifies three-phase AC power into DC power, then converts the DC power into adjustable medium-frequency current, supplying it to the capacitor and induction coil. This generates high-density magnetic lines of force in the induction coil, cutting the metal material held within and inducing significant eddy currents within the metal. Because medium-frequency induction heating operates on the principle of electromagnetic induction, the heat is generated within the workpiece itself. Operators can begin continuous smelting operations within ten minutes of using the furnace. Furthermore, this heating method offers rapid temperature rise, resulting in minimal oxidation. The oxidation loss of pig iron heated by medium-frequency induction is only 0.5%, compared to 2% in gas furnaces and 3% in coal-fired furnaces. Therefore, using medium-frequency heating can save at least 20-50 kg of steel raw materials per ton of pig iron compared to coal-fired furnaces, gaining widespread market acceptance.

[0003] The flue gas from the medium-frequency electric furnace in the smelting workshop mainly consists of FeO, Fe2O3, SiO2, MnO, and blackish-brown fumes produced by the combustion of dust and grease. The dust particle size ranges from approximately 0.01 to 80 μm, falling into the category of ultrafine dust. Most of this dust can enter the lungs through the respiratory tract, causing damage to lung function. Therefore, an effective flue gas ash removal system is essential to ensure a safe operating environment. In practice, suction ports are typically installed on the furnace's dust hood, and external fans are used to extract the flue gas, preventing its dispersion. However, this also results in a significant amount of heat being wasted, increasing the actual electricity consumption per ton of molten iron smelted by 30% compared to the original design standard, thus greatly increasing smelting costs. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a dust hood for a casting and smelting furnace.

[0005] A dust hood for a casting and smelting furnace according to an embodiment of the present invention includes: A cover body, wherein the cover body is provided with a suction chamber and a suction port, the suction port being located on the suction chamber for connecting a suction fan; A heat insulation component, comprising a fire baffle plate, a fire baffle ring, and a first connector, wherein the fire baffle plate is connected to the inner top wall of the cover, the fire baffle ring is disposed adjacent to the lower periphery of the fire baffle plate, one end of the first connector is connected to the fire baffle ring, and the other end is detachably connected to the fire baffle plate; When the dust removal hood is installed on the furnace body of the smelting furnace, the lower end of the fire baffle ring abuts against the upper end face of the furnace body, and the lower end of the cover is positioned at the upper end face of the perimeter of the furnace opening of the smelting furnace.

[0006] According to some embodiments of the present invention, the first connecting member includes: a limiting member and a connecting plate, the upper end of the connecting plate being connected to the limiting member, the lower end of the connecting plate being connected to the fire baffle ring, and the limiting member being clamped onto the fire baffle plate.

[0007] According to some embodiments of the present invention, the limiting member includes a first component, a second component, and a first fastener, one end of the first component is connected to one end of the second component via the first fastener, and the other end of the first component is hingedly connected to the other end of the second component; or The limiting component includes a first component, a second component, a first fastener, and a second fastener. One end of the first component is connected to one end of the second component via the first fastener, and the other end of the first component is connected to the other end of the second component via the second fastener.

[0008] According to some embodiments of the present invention, the first fastener is a connecting piece; and / or the second fastener is a connecting piece.

[0009] According to some embodiments of the present invention, the connecting plate is detachably connected to the fire baffle ring.

[0010] According to some embodiments of the present invention, the connecting plate is provided with a limiting part, the fire baffle ring is provided with a limiting pin, and the limiting pin is engaged with the limiting part for limiting.

[0011] According to some embodiments of the present invention, the limiting portion includes a longitudinal sliding hole and a transverse sliding hole, one end of the longitudinal sliding hole is connected to the transverse sliding hole at an angle, and the other end extends to the lower end of the connecting plate to form an opening for the limiting pin to slide in.

[0012] According to some embodiments of the present invention, the connecting plate is welded to the fire baffle ring.

[0013] According to some embodiments of the present invention, the fire shield ring includes a third component and a fourth component, the third component being connected to the first component and the fourth component being connected to the second component.

[0014] According to some embodiments of the present invention, a second connector is provided on the side wall of the fire baffle, the second connector being bolted to the inner side wall of the cover, and the first connector being connected to the second connector; or The fire baffle is provided with a second connector and a third connector on its side wall. The second connector is bolted to the inner side wall of the cover, and the first connector is connected to the third connector.

[0015] According to some embodiments of the present invention, the fire baffle ring includes a frame and a refractory material layer, wherein the refractory material layer is disposed on the inner side of the frame.

[0016] According to some embodiments of the present invention, the inner side of the fire shield ring is provided with a first reflective layer, and / or the inner side of the fire shield plate is provided with a second reflective layer.

[0017] According to some embodiments of the present invention, the fire baffle ring is provided with a notch, the notch corresponding to the pouring port of the smelting furnace.

[0018] According to some embodiments of the present invention, the fire baffle ring is provided with a plurality of smoke holes.

[0019] According to another embodiment of the present invention, a smelting furnace, the smelting furnace being a medium-frequency induction smelting furnace, includes: a furnace body and a dust removal hood, wherein the dust removal hood is the dust removal hood of the casting smelting furnace as described in any one of claims 1 to 14.

[0020] Beneficial effects

[0021] This invention utilizes a fire baffle and a fire baffle plate to form a bottom-opening cover structure. When the lower end of the fire baffle ring abuts against the upper surface of the furnace body, and the lower end of the cover is positioned at the upper edge of the furnace opening, a gap is left between the cover and the plane of the furnace opening. The suction at the suction port allows low-temperature air near the furnace to enter the dust collector hood through the gap between the cover and the furnace body, and then flow along the space outside the fire baffle ring towards the suction port. Meanwhile, the flue gas inside the furnace can leave the furnace through the partial gap between the fire baffle ring and the furnace body, and flows towards the suction port along with the low-temperature air. This prevents the low-temperature air from absorbing a large amount of heat from the furnace, thus significantly reducing heat loss and smelting costs. Simultaneously, the low-temperature air drawn into the dust collector hood and flowing along the outer surface of the fire baffle ring also helps to cool it, thereby extending its service life. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an overall schematic diagram of the smelting furnace according to the first embodiment of the present invention; Figure 2 This is a side view of the smelting furnace according to the first embodiment of the present invention; Figure 3This is a three-dimensional schematic diagram of a dust removal hood according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the heat insulation component according to the first embodiment of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the first connector according to the first embodiment of the present invention; Figure 6 This is a schematic diagram of the split structure of the limiting member and the fire baffle ring according to the first embodiment of the present invention; Figure 7 This is a three-dimensional schematic diagram of the fire shield ring according to the second embodiment of the present invention; Figure 8 This is a three-dimensional schematic diagram of a heat insulation component according to a third embodiment of the present invention.

[0023] Figure label: 100. Smelting furnace; 10. Dust collector hood; 20. Furnace body; 1. Cover; 11. Suction chamber; 12. Suction port; 2. Heat insulation component; 3. Fire baffle; 4. Fire baffle ring; 41. Limiting pin; 42. Third component; 43. Fourth component; 44. Frame; 45. Refractory material layer; 46. Notch; 5. First connector; 51. Limiting component; 511. First component; 512. Second component; 513. First fastener; 514. Second fastener; 52. Connecting plate; 521. Limiting part; 5211. Longitudinal sliding hole; 5212. Transverse sliding hole; 5213. Opening; 6. Second connector; 7. Third connector; 8. Pouring gate. Detailed Implementation

[0024] The technical solutions of the embodiments disclosed in this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions of the embodiments are merely illustrative and exemplary, and are not intended to limit the scope of this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort should fall within the scope of protection of this disclosure. Furthermore, techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification.

[0025] Combination Figures 1 to 8 As shown, a dust removal hood 10 for a casting and smelting furnace 100 according to an embodiment of the present invention includes: a cover body 1 and a heat insulation component 2, wherein the cover body 1 is provided with a suction chamber 11 and a suction port 12, the suction port 12 is provided on the suction chamber 11 and is used to connect a suction fan, the heat insulation component 2 includes a fire baffle plate 3, the fire baffle plate 3 is connected to the inner top wall of the cover body 1, wherein the fire baffle ring 4 is cylindrical or frustum-shaped with a smaller top and a larger bottom.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, the periphery of the cover 1 is bent downward to form a flange, thereby forming a semi-closed suction cavity 11 structure with a bottom opening 5213. The heat insulation components 2 are located in the suction cavity 11 and are connected to the center of the top wall of the cover 1. The height of the baffle plate 3 is less than the height of the cover 1. The baffle plate 3 is usually made of a flat or concave plate, thereby reducing the amount of heat radiation from the smelting furnace 100 to the outside and reducing the adverse effect of the heat radiated from the smelting furnace 100 on the cover 1.

[0027] To allow the dust collector hood 10 to flip, a rotating arm system is typically installed on one side of the furnace body 20 of the smelting furnace 100. The dust collector hood 10 is connected to the suspended arm of the rotating arm. The rotation of the rotating arm drives the dust collector hood 10 to open and close. When the dust collector hood 10 is placed above the furnace opening of the smelting furnace 100 under the action of the rotating arm, a certain height gap is left between the cover 1 and the furnace opening. This gap is usually between 5cm and 10cm high. This allows for the simultaneous extraction of flue gas from the smelting furnace 100 and the extraction of cold air from outside the smelting furnace 100, mixing the cold air with the hot flue gas to reduce the temperature of the hot flue gas in the extraction pipe. This prevents the heat from accumulating in the flue gas pipe and causing adverse effects. However, because the gap between the cover 1 and the furnace opening is relatively close to the furnace opening, a large amount of cold air passing through the gap quickly will be directly affected by the furnace opening temperature of the smelting furnace 100, inevitably carrying away a large amount of heat from the furnace opening and causing significant heat loss from the smelting furnace 100.

[0028] Therefore, this application adds a fire baffle ring 4 and a first connecting member 5 to the structure of the fire baffle plate 3. The fire baffle ring 4 is detachably connected to the fire baffle plate 3 through the first connecting member 5. The upper end of the dust removal hood 10 abuts against the periphery of the fire baffle plate 3, and the lower end of the dust removal hood 10 extends beyond the lower end of the flange of the cover 1. In this way, the fire baffle and the fire baffle plate 3 can form a cover structure with a bottom opening 5213. When the lower end of the fire baffle ring 4 abuts against the upper end surface of the furnace body 20, the lower end of the cover 1 is spaced at the upper end surface of the periphery of the furnace opening of the smelting furnace 100, so that there is a gap between the cover 1 and the plane where the furnace opening is located.

[0029] The suction at the suction port 12 allows low-temperature air near the smelting furnace 100 to enter the dust collector 10 through the gap between the cover 1 and the furnace body 20, and flow towards the suction port 12 along the space outside the baffle ring 4. Meanwhile, the flue gas inside the smelting furnace 100 can leave the smelting furnace 100 through a partial gap between the baffle ring 4 and the furnace body 20 (at the pouring port 8 of the smelting furnace 100) and flow towards the suction port 12 along with the low-temperature air. In this way, when the low-temperature air enters the dust collector 10, the heat of the smelting furnace 100 cannot come into large-area contact with the low-temperature air, thus preventing the heat of the smelting furnace 100 from being absorbed, thereby greatly reducing heat loss and reducing smelting costs. At the same time, when the low-temperature air drawn into the dust collector 10 flows on the outer side of the baffle ring 4, it can also play a certain role in cooling the baffle ring 4, which is beneficial to extending the service life of the baffle ring 4.

[0030] It is important to note here that, as Figure 2 As shown, since the furnace body 20 of the smelting furnace 100 has a pouring port 8 on one side and the pouring port 8 is inclined upward, part of the pouring port 8 structure will protrude from the end plane where the furnace opening is located. As a result, when the bottom of the baffle ring 4 abuts against the end face where the furnace opening is located, the structure of the pouring port 8 will interfere with the baffle ring 4, which can easily cause the gap between the baffle ring 4 and the upper end face of the furnace body 20 to be too large. Therefore, in order not to affect the sealing of other positions, a notch 46 can be set at the position of the baffle ring 4 near the pouring port. This not only provides a smoother passage for the flue gas of the smelting furnace 100, but also avoids the heat of the smelting furnace 100 from coming into contact with the low temperature air over a large area, thereby reducing heat loss and reducing smelting costs.

[0031] As an alternative to the above embodiment, some flue gas holes can be distributed on the side wall of the fire baffle ring 4. This allows the bottom shape of the fire baffle ring 4 to be shaped along the surface of the furnace body 20 of the smelting furnace 100, especially at the pouring port 8 of the smelting furnace 100. This ensures that the bottom surface of the fire baffle ring 4 can be relatively tightly pressed against the surface of the furnace body 20. This ensures that the flue gas of the smelting furnace 100 can flow out through the flue gas holes and mix with the low-temperature air, while also preventing the heat of the smelting furnace 100 from coming into large-area contact with the low-temperature air, thereby reducing heat loss and smelting costs.

[0032] In some embodiments of the present invention, such as Figure 4 and Figure 6As shown, the fire baffle ring 4 is detachably connected to the fire baffle plate 3, which facilitates the individual replacement of the fire baffle ring 4, thereby reducing maintenance costs. At the same time, when facing the existing dust hood 10 of the smelting furnace 100 on the market, the fire baffle ring 4 can be directly added to the structure of the original fire baffle plate 3, thereby achieving the effect of isolating the low-temperature air from the large-area contact between the high-temperature air of the smelting furnace 100, which greatly reduces the cost of modification and realizes a low-cost upgrade and transformation of the existing dust hood 10 of the smelting furnace 100.

[0033] Specifically, as one of the solutions for the detachable connection of the fire shield ring 4, such as Figure 8 As shown, the fire baffle 3 has a second connector 6 on its side wall. The second connector 6 is a lug structure with a threaded hole. At the same time, the inner top wall of the cover 1 also has a threaded hole. Thus, the second connector 6 is detachably connected to the inner side wall of the cover 1 by bolts. Therefore, in this embodiment, the first connector 5 can adopt a lug structure with a threaded hole, so that the first connector 5 is connected to the second connector 6. That is, the structure of the first connector 5 and the second connector 6 are coaxially fixed by the bolts of the fire baffle 3, thereby efficiently placing the fire baffle ring 4 below the fire baffle 3.

[0034] Similarly, a third connector 7 can be provided on the fire baffle 3. The third connector 7 is also provided as a lug structure with a threaded hole. The third connector 7 is provided between the adjacent second connector 6. In this way, the first connector 5 and the third connector 7 can be connected together by bolts.

[0035] Furthermore, as an alternative to the detachable connection of the aforementioned fire baffle ring 4, the first connecting member 5 includes a limiting member 51 and a connecting plate 52. The upper end of the connecting plate 52 is integrally connected to the limiting member 51, and the lower end of the connecting plate 52 is connected to the fire baffle ring 4. During assembly, the limiting member 51 is clamped onto the periphery of the limiting plate. Thus, this limiting structure can not only stably support the fire baffle ring 4, but also avoid altering the original fire baffle plate 3 structure, achieving a non-destructive addition of the fire baffle ring 4 structure. This is more conducive to non-destructive upgrades and modifications to the existing dust collector hood 10 of the smelting furnace 100.

[0036] Specifically, such as Figure 7 As shown, the limiting member 51 includes a first component 511, a second component 512, and a first fastener 513 (not shown in the figure). One end of the first component 511 is connected to one end of the second component 512 through the first fastener 513, and the other end of the first component 511 is hinged to the other end of the second component 512. In this way, the first component 511 and the second component 512 form a ring assembly with a single-sided opening 5213 through the hinge structure. The first fastener 513 is a connecting piece.

[0037] During assembly, the connecting piece is placed above the interface between the first component 511 and the second component 512, and then one end of the connecting piece is fixed to the first component 511 and the other end of the connecting piece is fixed to the second component 512 by screws.

[0038] Therefore, the limiting component 51 can be quickly and easily mounted onto the fire baffle plate 3 through the split-type combination structure, thereby improving the modification efficiency of the dust collector hood 10.

[0039] Similarly, as one of the alternative solutions to the aforementioned limiting member 51 structure, such as Figure 6 As shown, based on the above scheme, a second fastener 514 can also be provided. That is, the limiting member 51 includes a first component 511, a second component 512, a first fastener 513, and a second fastener 514. In this case, one end of the first component 511 is connected to one end of the second component 512 through the first fastener 513, and the other end of the first component 511 is connected to the other end of the second component 512 through the second fastener 514. The first fastener 513 is a connecting piece, and the second fastener 514 is a connecting piece.

[0040] During assembly, the connecting piece is placed above the interface of the first component 511 and the second component 512 respectively. Then, one end of the connecting piece is fixed to the first component 511 and the other end of the connecting piece is fixed to the second component 512 by screws. Thus, the limiting part 51 can be quickly and precisely assembled onto the fire baffle 3 through the split combination structure, thereby improving the modification efficiency of the dust cover 10.

[0041] In some embodiments of the present invention, such as Figure 7 As shown, the connecting plate 52 is welded to the fire baffle ring 4, thus forming an integral structure of the fire baffle ring 4 and the first connecting piece 5. During assembly, the first connecting piece 5 can be assembled onto the fire baffle plate 3 first, and then the fire baffle ring 4 can be welded onto the connecting plate 52.

[0042] Preferably, to avoid on-site welding operations, the fire baffle ring 4 can be formed into a split structure, such as... Figure 6 As shown, specifically, the fire shield ring 4 includes a third component 42 and a fourth component 43. At this time, the limiting component 51 includes a first component 511 and a second component 512. The third component 42 is connected to the first component 511, and the fourth component 43 is connected to the second component 512. In this way, a part of the fire shield ring 4 is welded to the first connecting component 5 to form a pre-assembly unit. During assembly, the two pre-assembly units are directly connected to the fire shield plate 3 through the first fastener 513, thereby effectively improving the operational efficiency of assembling the fire shield ring 4.

[0043] Furthermore, as one of the alternative solutions for the connection method between the connecting plate 52 and the fire baffle ring 4, such as Figure 4 and Figure 6 As shown, in this embodiment, the connecting plate 52 and the fire baffle ring 4 can be detachably connected. Specifically, the bottom of the connecting plate 52 is provided with a number of screw holes, and the fire baffle ring 4 is also provided with corresponding screw holes. During assembly, screws or bolts can be passed through the screw holes of the connecting plate 52 and the fire baffle ring 4 in sequence to connect the connecting plate 52 and the fire baffle ring 4 together.

[0044] Specifically, after the first connecting piece 5 is assembled onto the fire baffle plate 3, the fire baffle ring 4 is then connected to the first connecting piece 5. This step-by-step assembly structure eliminates the need for the fire baffle ring 4 to be assembled onto the fire baffle plate 3 together with the first connecting piece 5. This reduces the weight required for each assembly step, thereby improving operational efficiency. Furthermore, this detachable structure allows for replacement of only the fire baffle ring 4 if it is damaged, reducing replacement and repair costs and operational difficulty, and also improving repair and replacement efficiency.

[0045] Preferably, based on the above embodiments, such as Figure 4 As shown, the connecting plate 52 is provided with a limiting part 521, and the fire baffle ring 4 is provided with a limiting pin 41. During assembly, the limiting pin 41 of the fire baffle ring 4 can be used to limit the engagement with the limiting part 521 first, and then the fire baffle ring 4 and the connecting plate 52 can be connected by screws. In this way, the limiting structure can quickly limit one side of the fire baffle ring 4 to be positioned on the connecting plate 52, thereby reducing the difficulty of subsequent screw hole alignment operations, which is conducive to improving the accuracy of connection and improving assembly efficiency.

[0046] Specifically, such as Figure 5 As shown, the limiting part 521 includes a longitudinal sliding hole 5211 and a transverse sliding hole 5212. One end of the longitudinal sliding hole 5211 is connected to the transverse sliding hole 5212 at a right angle, and the other end extends to the lower end of the connecting plate 52, forming an opening 5213. In use, the limiting pin 41 slides into the longitudinal sliding hole 5211 through the opening 5213, then moves upward along the longitudinal sliding hole 5211 and turns into the transverse sliding hole 5212, thereby limiting the limiting pin 41. Thus, this sliding limiting structure can achieve the limiting function more efficiently and quickly, which is beneficial to improving assembly efficiency. At the same time, this limiting structure is not only suitable for the integrated fire baffle ring 4 structure, but also for the split fire baffle ring 4 structure, making it more versatile.

[0047] In some embodiments of the present invention, such as Figure 3As shown, the fire baffle 4 includes a frame 44 and a refractory material layer 45. Specifically, the frame 44 is generally annular, and the refractory material layer 45 is disposed on the inner side of the frame 44. Preferably, the cross-sectional structure of the frame 44 is U-shaped, and the refractory material is filled in the U-shaped cavity formed by the frame 44. This helps to improve the stability of the refractory material layer 45, prevent it from falling off, and thus improve the service life of the fire baffle 4.

[0048] In some embodiments of the present invention, since the fire baffle ring 4 is very close to the entrance of the smelting furnace 100, it is easily affected by the high temperature of the smelting furnace 100. Therefore, a first reflective layer is provided on the inner side of the fire baffle ring 4. The first reflective layer can reflect some of the heat radiated outward from the smelting furnace 100, thereby reducing the heat loss of the smelting furnace 100. At the same time, it is also beneficial to reduce the adverse effects of high temperature on the fire baffle ring 4 and improve the service life of the fire baffle ring 4.

[0049] Similarly, a second reflective layer is provided on the inner side of the fire baffle 3. This second reflective layer can reflect some of the heat radiated outward from the smelting furnace 100, thereby reducing the adverse effects of high temperature on the fire baffle 3.

[0050] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "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 the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0052] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dust hood for a casting and smelting furnace, characterized in that, include: A cover body, wherein the cover body is provided with a suction chamber and a suction port, the suction port being located on the suction chamber for connecting a suction fan; A heat insulation component, comprising a fire baffle plate, a fire baffle ring, and a first connector, wherein the fire baffle plate is connected to the inner top wall of the cover, the fire baffle ring is disposed adjacent to the lower periphery of the fire baffle plate, one end of the first connector is connected to the fire baffle ring, and the other end is detachably connected to the fire baffle plate; When the dust cover is installed on the furnace body of the smelting furnace, the lower end of the fire baffle ring abuts against the upper end face of the furnace body, and the lower end of the cover is positioned above the furnace opening end face of the smelting furnace.

2. The dust collector hood for a casting and smelting furnace according to claim 1, characterized in that, The first connecting member includes a limiting member and a connecting plate. The upper end of the connecting plate is connected to the limiting member, and the lower end of the connecting plate is connected to the fire baffle ring. The limiting member is clamped to the fire baffle plate.

3. The dust removal hood for a casting and smelting furnace according to claim 2, characterized in that, The limiting member includes a first component, a second component, and a first fastener. One end of the first component is connected to one end of the second component through the first fastener, and the other end of the first component is hinged to the other end of the second component. or The limiting component includes a first component, a second component, a first fastener, and a second fastener. One end of the first component is connected to one end of the second component via the first fastener, and the other end of the first component is connected to the other end of the second component via the second fastener.

4. The dust collector hood for a casting and smelting furnace according to claim 3, characterized in that, The first fastener is a connecting piece, and / or the second fastener is a connecting piece.

5. A dust collector hood for a casting and smelting furnace according to any one of claims 2 to 4, characterized in that, The connecting plate is detachably connected to the fire baffle ring.

6. The dust collector hood for a casting and smelting furnace according to claim 5, characterized in that, The connecting plate is provided with a limiting part, and the fire baffle ring is provided with a limiting pin. The limiting pin and the limiting part are engaged in a limiting cooperation.

7. The dust collector hood for a casting and smelting furnace according to claim 6, characterized in that, The limiting part includes a longitudinal sliding hole and a transverse sliding hole. One end of the longitudinal sliding hole is connected to the transverse sliding hole at an angle, and the other end extends to the lower end of the connecting plate to form an opening for the limiting pin to slide in.

8. A dust hood for a casting and smelting furnace according to any one of claims 2 to 4, characterized in that, The connecting plate is welded to the fire baffle ring.

9. A dust collector hood for a casting and smelting furnace according to claim 8, characterized in that, The fire shield ring includes a third component and a fourth component, wherein the third component is connected to the first component and the fourth component is connected to the second component.

10. A dust collector hood for a casting and smelting furnace according to claim 1, characterized in that, The fire baffle plate has a second connector on its side wall, which is bolted to the inner side wall of the cover. The first connector is connected to the second connector. The fire baffle is provided with a second connector and a third connector on its side wall. The second connector is bolted to the inner side wall of the cover, and the first connector is connected to the third connector.

11. A dust hood for a casting and smelting furnace according to claim 8 or 9, characterized in that, The fire baffle ring includes a frame and a refractory material layer, wherein the refractory material layer is disposed on the inner side of the frame.

12. A dust hood for a casting and smelting furnace according to claim 10 or 11, characterized in that, The inner side of the fire shield ring is provided with a first reflective layer, and / or the inner side of the fire shield plate is provided with a second reflective layer.

13. The dust hood for a casting and smelting furnace according to claim 12, characterized in that, The fire baffle ring has a notch, which corresponds to the pouring port of the smelting furnace.

14. The dust hood for a casting and smelting furnace according to claim 12, characterized in that, The fire baffle ring is provided with several smoke holes.

15. A melting furnace, wherein the melting furnace is a medium-frequency induction melting furnace, characterized in that, include: The furnace body and the dust hood, wherein the dust hood is the dust hood of the casting and smelting furnace as described in any one of claims 1 to 14.

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