Horizontal electric heating reduction furnace

Abstract

The utility model provides a horizontal electric heating reduction furnace, including reduction furnace main part, furnace lid subassembly, electric heating subassembly and magnesium crystallization subassembly, reduction chamber is formed in the reduction furnace main part, reduction furnace main part is provided with the deslagging channel that communicates with reduction chamber, furnace lid subassembly is connected on the reduction furnace main part, the electric heating subassembly is connected with the magnesium crystallization subassembly, and the magnesium crystallization subassembly is connected with the electric heating subassembly. The furnace cover assembly is provided with a feeding channel communicating with the reduction cavity. The electric heating assembly is used for heating materials located in the reduction chamber and generating magnesium steam, and the magnesium crystallization assembly is communicated with the reduction chamber through a magnesium steam guide pipe so as to crystallize the magnesium steam from the reduction chamber. The heating time can be shortened to 2-4 hours, compared with an existing external heating mode, a larger material reaction space can be achieved, reduction is more thorough, the output rate is higher, an electric (clean energy) heating mode is adopted, pollution is effectively reduced, and stability and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction furnaces, in particular to a horizontal electric heating reduction furnace. Background Art

[0002] Magnesium reduction furnaces are the core equipment in magnesium production. Externally heated horizontal reduction tank reduction furnaces are commonly used both domestically and internationally. Typical types include single-chamber, single-sided, single-row tank reduction furnaces, dual-chamber, double-sided, double-row tank reduction furnaces, and single-chamber, double-sided, double-row tank reduction furnaces. For example, the single-chamber, single-sided, single-row tank reduction furnace is similar to gas-fired and heavy oil-fired reduction furnaces, with reduction tanks arranged in a single row on one side. The combustion chamber is located at the rear, and the furnace houses 14 to 16 reduction tanks, with a fire hole located between each tank. This furnace type, with its single row of tanks and single-sided arrangement, is very convenient to operate and facilitates mechanization in the workshop layout. However, its output and thermal efficiency are low.

[0003] The horizontal reduction furnace of the existing technology adopts external heating. The flame is reflected from the combustion chamber through the fire baffle to the furnace top. The flame is drawn downward by the chimney, heating the reduction tank. The flame is then discharged through the fire hole and the branch flue to the main flue. As a result, the heat conduction efficiency is low and the heating time is long, usually taking 10-12 hours. The traditional magnesium reduction furnace uses semi-coke raw gas as fuel, which has low combustion efficiency, unstable combustion and serious pollution.

[0004] In view of this, it is necessary to propose a horizontal electric heating reduction furnace to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of the utility model is to provide a horizontal electric heating reduction furnace to solve the technical problems of low heat conduction efficiency, long heating time and serious pollution in the existing metal magnesium reduction furnace.

[0006] To achieve the above-mentioned purpose, the utility model provides a horizontal electric heating reduction furnace, comprising a reduction furnace body, a furnace cover assembly, an electric heating assembly and a magnesium crystallization assembly, wherein:

[0007] The reduction furnace body is formed with a reduction chamber, and the reduction furnace body is provided with a slag discharge channel connected to the reduction chamber. The furnace cover assembly is connected to the reduction furnace body, and the furnace cover assembly is provided with a feed channel connected to the reduction chamber; the electric heating assembly is used to heat the material located in the reduction chamber and generate magnesium vapor, and the magnesium crystallization assembly is connected to the reduction chamber through a magnesium vapor conduit to crystallize the magnesium vapor from the reduction chamber.

[0008] Preferably, the furnace cover assembly includes a top plate, a cover plate and a first connecting flange, the interior of the top plate is filled with refractory insulation cotton, the top plate is provided with the feed channel, the top of the reduction furnace body is provided with a second connecting flange corresponding to the first connecting flange, the top plate is connected to the reduction furnace body through the first connecting flange and the second connecting flange, and the cover plate can be opened and closed and is connected to the top of the top plate and is provided directly above the feed channel.

[0009] Preferably, a lifting lug is further provided on the top of the cover plate.

[0010] Preferably, the magnesium crystallization component includes a crystallization tank, a crystallization attachment and an end cover, wherein a cooling space is formed inside the crystallization tank, and the crystallization tank includes a connecting end and a cantilevered end arranged relatively along its own extension direction, the connecting end is fixedly connected to the side wall of the reduction furnace body, the cantilevered end is provided with an outlet connected to the cooling space, the end cover can be connected to the cantilevered end in an openable and closable manner and is arranged corresponding to the outlet, the cooling space is connected to the reduction chamber through the magnesium vapor conduit; the crystallization attachment is arranged in the cooling space for attachment of the crystallized magnesium.

[0011] Preferably, the crystallization tank includes an inner tube, an outer tube, and a first end plate and a second end plate relatively connected to the two ends of the outer tube, the first end plate and the second end plate are welded to the outer peripheral wall of the inner tube, the outer tube, the first end plate and the second end plate together form a circulating water cooling space, the outer tube is provided with a water inlet pipe connected to the circulating water cooling space, the inner cavity of the inner tube is the cooling space, and the crystallization attachment is arranged in the inner tube.

[0012] Preferably, it also includes a vacuum tube connected to the cooling space.

[0013] Preferably, a handle is provided on the outer wall of the end cover.

[0014] Preferably, the bottom surface of the reduction chamber is wavy.

[0015] Preferably, the furnace wall of the reduction furnace body includes, from the inside to the outside, a refractory brick layer, an insulation brick layer, an insulation board layer and a steel plate layer.

[0016] Preferably, a base is provided at the bottom of the reduction furnace body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model provides a horizontal electric heating reduction furnace, comprising a reduction furnace body, a furnace cover assembly, an electric heating assembly and a magnesium crystallization assembly, wherein the reduction furnace body is formed with a reduction chamber, the reduction furnace body is provided with a slag discharge channel connected to the reduction chamber, the furnace cover assembly is connected to the reduction furnace body, and the furnace cover assembly is provided with a feed channel connected to the reduction chamber; the electric heating assembly is used to heat the material located in the reduction chamber and generate magnesium vapor, and the magnesium crystallization assembly is connected to the reduction chamber through a magnesium vapor conduit to crystallize the magnesium vapor from the reduction chamber.

[0019] This application uses an electric heating component to efficiently heat the material, quickly bringing it to the temperature required for the reduction reaction, thereby accelerating the reduction reaction and shortening the heating time to 2-4 hours. Because the material and the electric heating component are both contained within the reduction chamber, compared to existing external heating methods, there is a larger reaction space for the material, resulting in a more thorough reduction and higher yield. The use of electric (clean energy) heating effectively reduces pollution and is stable and rapid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a front view schematic diagram of the overall structure of one embodiment of the present utility model;

[0022] Figure 2 It is a side view of the overall structure in one embodiment of the present invention;

[0023] Figure 3 This is a front structural schematic diagram of a reduction furnace body in one embodiment of the present utility model;

[0024] Figure 4 This is a structural diagram of a furnace cover assembly in one embodiment of the present invention;

[0025] Figure 5 This is a front structural schematic diagram of a magnesium crystal assembly in one embodiment of the present invention;

[0026] Figure 6 It is a schematic side structural diagram of a magnesium crystal assembly in one embodiment of the present invention.

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0028] Description of Figure Numbers:

[0029] 10. Reduction furnace body; 110. Reduction chamber; 120. Slag discharge channel; 130. Magnesium vapor conduit; 140. Second connecting flange; 151. Refractory brick layer; 152. Insulation brick layer; 153. Insulation board layer; 154. Steel plate layer; 160. Base; 20. Furnace cover assembly; 210. Feed channel; 220. Top plate; 221. Refractory insulation cotton; 230. Cover plate; 240. Lifting lug plate; 250. First connecting flange; 30, electric heating component; 40, magnesium crystallization component; 410, crystallization tank; 411, cooling space; 412, inner tube; 413, outer tube; 4131, first end plate; 4132, second end plate; 4133, circulating water cooling space; 420, connecting end; 430, cantilevered end; 440, crystallization attachment; 450, end cover; 460, vacuum tube; 470, handle; 480, water inlet pipe. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as described in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] Please see the attached Figures 1 to 6 In one embodiment, the present invention provides a horizontal electric heating reduction furnace, comprising a reduction furnace body 10, a furnace cover assembly 20, an electric heating assembly 30 and a magnesium crystallization assembly 40, wherein the reduction furnace body 10 is formed with a reduction chamber 110, and the reduction furnace body 10 is provided with a slag discharge channel 120 connected to the reduction chamber 110, the furnace cover assembly 20 is connected to the reduction furnace body 10, and the furnace cover assembly 20 is provided with a feed channel 210 connected to the reduction chamber 110; the electric heating assembly 30 is used to heat the material located in the reduction chamber 110 and generate magnesium vapor, and the magnesium crystallization assembly 40 is connected to the reduction chamber 110 through a magnesium vapor conduit 130 to crystallize the magnesium vapor from the reduction chamber 110.

[0035] Specifically, the reduction chamber 110 is where the material is heated and subjected to a reduction reaction. The material is preferably a mixture of magnesium oxide and an aluminum-containing reducing agent and pressed into pellets, wherein the mass ratio of magnesium oxide to the aluminum-containing reducing agent is 2.9-3.1:1; the reduction furnace body 10 is provided with a slag discharge channel 120 connected to the reduction chamber 110 for discharging waste or residue after the reaction; the furnace cover assembly 20 is provided with a feed channel 210 connected to the reduction chamber 110 for adding reaction materials into the reduction chamber 110; the electric heating assembly 30 is the heating system of the equipment, which is used to heat the material located in the reduction chamber 110. The electric heating assembly 30 can adopt existing mature equipment as long as it can effectively heat the material; during the heating process, the material will undergo a reduction reaction to generate magnesium vapor; the magnesium crystallization assembly 40 is used to crystallize the magnesium vapor, and the magnesium vapor conduit 130 connects the reduction chamber 110 and the magnesium crystallization assembly 40 so that the magnesium vapor can be transported from the reduction chamber 110 to the magnesium crystallization assembly 40 for crystallization.

[0036] In another preferred embodiment, a spiral slag scraper (not shown) can be provided at a position corresponding to the slag discharge channel 120, thereby achieving mechanized slag scraping and improving production efficiency.

[0037] The present application scheme is to efficiently heat the material through the electric heating component 30 so that it quickly reaches the temperature required for the reduction reaction, thereby accelerating the reduction reaction, and the heating time can be shortened to 2-4 hours. Since the material and the electric heating component 30 are both in the reduction chamber 110, compared with the existing external heating method, there can be a larger material reaction space, the reduction is more thorough, the output rate is higher, and the electric (clean energy) heating method is adopted to effectively reduce pollution, stably and quickly. In a preferred embodiment, the design of the present application makes it possible to add materials, discharge waste materials and crystallize magnesium vapor through certain automated equipment. For example, automatic slag removal can be achieved, thereby improving production efficiency and ease of operation (the external heating method of the prior art basically adopts manual loading and slag removal).

[0038] As a preferred embodiment, the furnace cover assembly 20 includes a top plate 220, a cover plate 230 and a first connecting flange 250. The interior of the top plate 220 is filled with refractory insulation cotton 221. The top plate 220 is provided with the feed channel 210. The top of the reduction furnace body 10 is provided with a second connecting flange 140 corresponding to the first connecting flange 250. The top plate 220 is connected to the reduction furnace body 10 through the first connecting flange 250 and the second connecting flange 140. The cover plate 230 can be opened and closed and is connected to the top of the top plate 220 and is provided directly above the feed channel 210.

[0039] Specifically, the interior of the top plate 220 is filled with refractory insulation cotton 221 to improve the thermal insulation performance of the furnace cover and reduce heat loss. The top plate 220 is provided with a feed channel 210 for adding reaction materials to the reduction chamber 110 in the reduction furnace body 10. The top of the reduction furnace body 10 is provided with a second connecting flange 140 corresponding to the first connecting flange 250. Through the connection of the first connecting flange 250 and the second connecting flange 140, the top plate 220 and the reduction furnace body 10 can be connected, ensuring the sealing and stability between the furnace cover assembly 20 and the reduction furnace body 10. The cover plate 230 is connected to the top of the top plate 220 in an openable and closable manner and is located directly above the feed channel 210. When it is necessary to add materials, the cover plate 230 can be opened and added to the reduction chamber 110 through the feed channel 210. During the heating and reduction reaction process, the cover plate 230 is in a closed state to ensure the sealing and safety of the furnace.

[0040] Furthermore, a lifting lug 240 is provided on the top of the cover plate 230. The design of the lifting lug 240 enables the cover plate 230 to be conveniently lifted and carried by lifting equipment.

[0041] As a preferred embodiment, the magnesium crystallization component 40 includes a crystallization tank 410, a crystallization attachment body 440 and an end cover 450, wherein a cooling space 411 is formed inside the crystallization tank 410, and the crystallization tank 410 includes a connecting end 420 and a cantilevered end 430 arranged relatively along its own extension direction, the connecting end 420 is fixedly connected (preferably welded) to the side wall of the reduction furnace body 10, the cantilevered end 430 is provided with an outlet connected to the cooling space 411, the end cover 450 can be connected to the cantilevered end 430 in an openable and closable manner and is arranged corresponding to the outlet, the cooling space 411 is connected to the reduction chamber 110 through the magnesium vapor conduit 130; the crystallization attachment body 440 is arranged in the cooling space 411 for attachment of crystallized magnesium, that is, magnesium is attached to the wall of the crystallization attachment body 440.

[0042] Specifically, in the reduction chamber 110 of the reduction furnace body 10, the material is heated by the electric heating component 30 to generate magnesium vapor, and the magnesium vapor is transported to the cooling space 411 of the magnesium crystallization component 40 through the magnesium vapor conduit 130. A crystallization attachment 440 is provided in the cooling space 411. After the magnesium vapor enters the cooling space 411, it will gradually cool and crystallize on the crystallization attachment 440. When the magnesium vapor forms enough magnesium crystals on the wall of the crystallization attachment 440, the crystallization attachment 440 can be removed by opening the end cover 450 on the cantilever end 430 to collect these crystals. The design and arrangement of the crystallization attachment 440 optimize the crystallization process of the magnesium vapor and improve the crystallization efficiency and purity of the magnesium.

[0043] Preferably, the crystal attachment body 440 is in the shape of a cone, and the magnesium crystals can be attached to the wall surface of the cone, thereby facilitating the collection of the magnesium crystals.

[0044] As a preferred embodiment, the crystallization tank 410 includes an inner tube 412, an outer tube 413, and a first end plate 4131 and a second end plate 4132 relatively connected to the two ends of the outer tube 413, the first end plate 4131 and the second end plate 4132 are welded to the outer peripheral wall of the inner tube 412, the outer tube 413, the first end plate 4131 and the second end plate 4132 are jointly enclosed to form a circulating water cooling space 4133, the outer tube 413 is provided with a water inlet pipe 480 connected to the circulating water cooling space 4133, the inner cavity of the inner tube 412 is the cooling space 411, and the crystal attachment 440 is arranged in the inner tube 412.

[0045] Specifically, such as Figure 5 As shown, the crystallization tank 410 consists of an inner tube 412 and an outer tube 413, and a first end plate 4131 and a second end plate 4132 are welded at both ends of the outer tube 413, which together form a circulating water cooling space 4133. Circulating cooling water is introduced into this space, and the heat on the outer wall of the inner tube 412 (i.e., the cooling space 411) is taken away by the circulation of the water flow, thereby achieving a cooling effect. The magnesium vapor gradually crystallizes due to the decrease in temperature, thereby accelerating the crystallization of the magnesium vapor and improving production efficiency.

[0046] As a preferred embodiment, a vacuum tube 460 is further included, communicating with the cooling space 411. The design of the vacuum tube 460 further controls the pressure and atmosphere within the cooling space 411. Adjusting the pressure within the vacuum tube 460 influences the crystallization rate and crystal morphology of the magnesium vapor, thereby optimizing the crystallization effect. Furthermore, evacuating the vacuum tube 460 can also lower the reduction temperature within the reduction chamber 110.

[0047] Furthermore, a handle 470 is provided on the outer wall of the end cover 450. The provision of the handle 470 facilitates opening and closing the end cover 450.

[0048] Furthermore, the bottom surface of the reduction chamber 110 is wavy. This wavy bottom design can increase the flow path of materials within the reduction chamber 110, thereby enhancing the mixing effect of the materials. The wavy bottom design can also change the distribution of heat within the reduction chamber 110, avoiding localized overheating or uneven cooling. Compared to a flat bottom surface, the wavy bottom surface can better disperse the pressure of the materials on the bottom surface, reducing equipment damage caused by long-term use. Preferably, the bottom surface of the reduction chamber 110 is made of a wear-resistant material.

[0049] Furthermore, the furnace wall of the reduction furnace body 10 includes, from the inside out, a refractory brick layer 151, an insulating brick layer 152, an insulating plate layer 153, and a steel plate layer 154. The innermost refractory brick layer 151 can withstand the high temperature environment within the reduction furnace, ensuring that the furnace wall will not melt or deform at high temperatures. The refractory brick layer 151 is generally made of highly refractory materials, such as high-alumina bricks and clay refractory bricks, and has excellent high-temperature resistance. The insulating brick layer 152 and the insulating plate layer 153 are located outside the refractory brick layer 151 and provide excellent thermal insulation. These insulating layers can effectively reduce heat loss within the furnace and improve the thermal efficiency of the reduction furnace.

[0050] Furthermore, a base 160 is provided at the bottom of the reduction furnace body 10. The base 160 provides a stable support for the reduction furnace body 10, thereby enhancing the stability of the entire device.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A horizontal electric heating reduction furnace, characterized in that: It includes a reduction furnace body, a furnace cover assembly, an electric heating assembly and a magnesium crystallization assembly, wherein: The reduction furnace body is formed with a reduction chamber, and the reduction furnace body is provided with a slag discharge channel connected to the reduction chamber. The furnace cover assembly is connected to the reduction furnace body, and the furnace cover assembly is provided with a feed channel connected to the reduction chamber; the electric heating assembly is used to heat the material located in the reduction chamber and generate magnesium vapor, and the magnesium crystallization assembly is connected to the reduction chamber through a magnesium vapor conduit to crystallize the magnesium vapor from the reduction chamber.

2. The horizontal electric heating reduction furnace according to claim 1, characterized in that: The furnace cover assembly includes a top plate, a cover plate and a first connecting flange. The interior of the top plate is filled with refractory insulation cotton. The top plate is provided with the feed channel. The top of the reduction furnace body is provided with a second connecting flange corresponding to the first connecting flange. The top plate is connected to the reduction furnace body through the first connecting flange and the second connecting flange. The cover plate can be opened and closed and is connected to the top of the top plate and is provided directly above the feed channel.

3. The horizontal electric heating reduction furnace according to claim 2, characterized in that: A lifting lug is also provided on the top of the cover plate.

4. The horizontal electric heating reduction furnace according to claim 1, characterized in that: The magnesium crystallization component includes a crystallization tank, a crystallization attachment and an end cover, wherein a cooling space is formed inside the crystallization tank, and the crystallization tank includes a connecting end and a cantilevered end arranged relatively along its own extension direction, the connecting end is fixedly connected to the side wall of the reduction furnace body, the cantilevered end is provided with an outlet connected to the cooling space, the end cover can be connected to the cantilevered end in an openable and closable manner and is arranged corresponding to the outlet, the cooling space is connected to the reduction chamber through the magnesium vapor conduit; the crystallization attachment is arranged in the cooling space for attachment of the crystallized magnesium.

5. The horizontal electric heating reduction furnace according to claim 4, characterized in that: The crystallization tank includes an inner tube, an outer tube, and a first end plate and a second end plate relatively connected to the two ends of the outer tube. The first end plate and the second end plate are welded to the outer peripheral wall of the inner tube. The outer tube, the first end plate and the second end plate are jointly surrounded to form a circulating water cooling space. The outer tube is provided with a water inlet pipe connected to the circulating water cooling space. The inner cavity of the inner tube is the cooling space, and the crystal attachment is arranged in the inner tube.

6. The horizontal electric heating reduction furnace according to claim 5, characterized in that: It also includes a vacuum tube connected to the cooling space.

7. The horizontal electric heating reduction furnace according to claim 4, characterized in that: The outer wall of the end cover is provided with a handle.

8. The horizontal electric heating reduction furnace according to any one of claims 1 to 7, characterized in that: The bottom surface of the reduction chamber is wavy.

9. The horizontal electric heating reduction furnace according to any one of claims 1 to 7, characterized in that: The furnace wall of the reduction furnace body includes, from the inside to the outside, a refractory brick layer, a thermal insulation brick layer, a thermal insulation plate layer and a steel plate layer.

10. The horizontal electric heating reduction furnace according to any one of claims 1 to 7, characterized in that: A base is provided at the bottom of the reduction furnace body.

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