A closed rotary ferroalloy ore furnace

Abstract

The invention discloses a closed rotary ferroalloy ore furnace, comprising a fixed furnace cover, a furnace body, a rotary power mechanism, and a material surface loosening mechanism; a sealing structure is provided between the fixed furnace cover and the furnace body; the furnace body is mounted on the rotary power mechanism, and the rotary power mechanism drives the furnace body to rotate relative to the fixed furnace cover, and the sealing structure maintains a sealed connection between the fixed furnace cover and the furnace body, and ensures normal rotation between the two; the material surface loosening mechanism is mounted on an electric furnace mounting platform, and extends from the fixed furnace cover into the furnace body, thereby stirring the material surface in the furnace body, and the material surface loosening mechanism extends through the fixed furnace cover for a sealed connection. The invention enables the electric furnace to be completely closed for production, reduces the operation of staff, improves the efficiency of processing and production, improves the working environment of workers, and improves production safety.

Description

Technical Field

[0001] The invention relates to the technical field of smelting electric furnaces, and in particular to a closed rotary ferroalloy ore-fired furnace. Background Art

[0002] All electric furnaces that can be sealed based on production characteristics and technical feasibility have been sealed. However, there are still a few products in my country, such as ferroalloys (ferrosilicon, industrial silicon, high-silicon ferrosilicon), which have not been sealed in electric furnaces due to process and technical reasons. It is obvious that unsealed furnaces cause environmental pollution and waste a lot of valuable resources, which is detrimental to both society and enterprises.

[0003] Usually the production process of an electric furnace is: the required raw materials are processed according to the specified particle size, component content, moisture content and other requirements, weighed and mixed according to the specified ingredient ratio, and then sent to the silo on the roof of the electric furnace through a conveyor. The charge is transported to the furnace through the material pipe under the silo, and the charge is reduced in the furnace to produce the required products.

[0004] The production process of a closed electric furnace mainly adds a closed smoke hood to the furnace body. Its function is to prevent the oxygen-containing atmosphere outside the furnace from mixing with the CO gas produced by the reaction inside the furnace. During production, the air pressure inside the closed smoke hood of the electric furnace must be greater than the air pressure outside the furnace, which is a slightly positive pressure state. The charge is input into the furnace through multiple material pipes through the furnace cover. The material pipes must be sealed and insulated when passing through the furnace cover. The gas analysis instrument can clearly know the gas pressure, gas component concentration and content in the furnace. After the electric furnace is closed, there is no operator on the electric furnace platform, and all operations are completed through the automatic operating system to achieve a safe and economical operation mode.

[0005] Ferroalloy smelting electric furnaces are subject to high temperature in the process of smelting and reduction. If the charge is not mixed evenly or the charge is not breathable, the charge surface will be hardened. The consequence is that the electrode is not easy to insert, the electrode is not deep enough, the fire is seriously stepped on, a large amount of reaction gas SiO forming silicon alloy escapes, and the environment is seriously polluted, resulting in a decrease in output, low element content, and increased power consumption. At present, all domestic ferroalloy smelting electric furnaces are semi-closed. In the operation of electric furnaces, there must be a process: that is, the work of manually picking the loose charge surface. Although it can be done by human-operated machinery, the work of picking the loose charge surface under the harsh conditions of the furnace surface is too high, which poses a safety hazard to the workers who pick the furnace. Therefore, the closed production of electric furnaces is particularly important for ferroalloy (ferrosilicon, industrial silicon, silicon calcium) smelting electric furnaces, but solving the problem of hardening of the furnace charge surface in closed production has become a difficult problem. Summary of the invention

[0006] The purpose of the present invention is to solve the problems raised in the above background technology and provide a closed rotary ferroalloy ore furnace.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: a closed rotary ferroalloy ore furnace, comprising a fixed furnace cover and a furnace body, wherein the fixed furnace cover is respectively provided with a chimney connection hole, a plurality of electrode tube mounting holes, and a plurality of feed holes; and also comprising a rotary power mechanism and a material surface loosening mechanism;

[0008] The fixed furnace cover is suspended by a furnace cover hanging ring device and installed at the furnace mouth of the furnace body, and a sealing structure is provided between the fixed furnace cover and the furnace body; the furnace body is installed on a rotating power mechanism, and the rotating power mechanism drives the furnace body to rotate relative to the fixed furnace cover, and the sealing structure maintains a sealed connection between the fixed furnace cover and the furnace body, and ensures normal rotation between the two;

[0009] The material surface loosening mechanism is installed on the electric furnace installation platform and extends from the fixed furnace cover into the furnace body, so as to stir the material surface in the furnace body. The material surface loosening mechanism extends through the fixed furnace cover for sealing connection.

[0010] In the above-mentioned closed rotating ferroalloy ore furnace, the rotating power mechanism includes a base, a furnace body rotating load-bearing plate, and a furnace body rotating reducer. The base is provided with a rotating central axis for installing the furnace body rotating load-bearing plate. The furnace body is installed on the furnace body rotating load-bearing plate. The furnace body rotating reducer is installed on the base and can drive the furnace body rotating load-bearing plate to rotate.

[0011] In the above-mentioned closed rotating ferroalloy ore furnace, the sealing structure includes a sealing connection plate, a sealing gasket, and a furnace body sealing groove arranged on the end of the furnace body. The furnace body sealing groove is filled with sealing filling sand. The sealing connection plate is sealed and fixedly connected with the fixed furnace cover through the sealing gasket, and is provided with an annular sealing ring extending into the sealing filling sand.

[0012] In the above-mentioned closed rotating ferroalloy ore furnace, the material surface loosening mechanism includes a loosening reducer and a water-cooled rotating rod. One end of the water-cooled rotating rod is rotatably connected to the loosening reducer, and the other end passes through the fixed furnace cover and is provided with a plurality of loosening teeth. The water-cooled rotating rod is sealed and rotatably connected to the fixed furnace cover.

[0013] In the above-mentioned closed rotating ferroalloy ore-fired furnace, the furnace body rotating load-bearing plate includes a rotating load-bearing frame and a transmission connecting plate. The center of the rotating load-bearing frame is connected to the rotating center axis through a bearing assembly, and the outer circumferential edge is fixedly connected to the transmission connecting plate. The bottom end of the furnace body is fixed to the transmission connecting plate. A gear transmission assembly is provided on the circumference of the transmission connecting plate. The furnace body rotating reducer on the base is meshed and transmitted with the gear transmission assembly on the transmission connecting plate through the motor gear.

[0014] In the above-mentioned closed rotating ferroalloy ore furnace, a plurality of supporting rotating wheels are arranged between the bottom of the rotating load-bearing plate of the furnace body and the base, the supporting rotating wheels are fixedly connected to the transmission connecting plate, and the base is provided with a circular track for directional rotation of the plurality of supporting rotating wheels.

[0015] In the above-mentioned closed rotating ferroalloy ore furnace, a rotating positioning frame is provided between the plurality of supporting rotating wheels and the rotating central shaft, and the rotating positioning frame is connected to the rotating central shaft through a bearing assembly.

[0016] In the above-mentioned closed rotary ferroalloy ore-fired furnace, a plurality of maintenance hydraulic jacks are provided on the base, and the maintenance hydraulic jacks can be correspondingly supported on the bottom end of the furnace body.

[0017] In the above-mentioned closed rotating ferroalloy ore furnace, a smoke recovery connection hole is also provided on the fixed furnace cover. The fixed furnace cover includes a plurality of furnace cover plates and furnace cover side plates. Flange plates are used for sealing connection between two adjacent furnace cover plates, between two furnace cover side plates, and between the furnace cover plates and the furnace cover side plates.

[0018] In the above-mentioned closed rotary ferroalloy ore furnace, three material surface loosening mechanisms are provided, and two adjacent material surface loosening mechanisms are arranged with the center of the fixed furnace cover at an angle of 120 degrees.

[0019] The present invention has the following beneficial effects:

[0020] In the present invention, the furnace body and the fixed furnace cover are connected by a rotating power mechanism to enable the furnace body to rotate relative to the fixed furnace cover. At the same time, the sealing structure between the furnace body and the fixed furnace cover forms a rotating sealed connection between the two, and the sealing structure is simple and reliable. During the processing and production process, the material surface loosening mechanism will cooperate with the rotating material surface of the rotating falling body to loosen, so that the electric furnace can be completely produced in a closed manner, reducing the operation of staff, improving the efficiency of processing and production, improving the working environment of workers, and improving production safety.

[0021] The present invention enables the electric furnace to carry out completely closed production, and connects with an external CO recovery device through a smoke recovery connection hole on a fixed furnace cover, so as to prevent the CO generated in the smelting process of the electric furnace from being burned in the furnace and becoming CO2 emissions. The conversion to a rotary closed ferroalloy furnace greatly reduces the CO2 emission index and solves the environmental protection problem at the same time. The purity of the CO gas generated in the smelting process reaches more than 70%, and the calorific value is 2400-2600 kcal; the closed production method can recover CO for comprehensive utilization, such as power generation, ethanol, methanol and other chemical products.

[0022] The present invention has a plurality of maintenance hydraulic jacks arranged on the base, which are specially used for lifting the furnace body to solve the problem that it is difficult to repair once the rotating mechanism fails; and the fixed furnace cover is composed of a plurality of furnace cover plates and furnace cover side plates which are sealed and connected. When lifting and repairing, the furnace cover side plates can be directly and quickly disassembled, and the furnace body can be lifted up through the oil cylinder by a plurality of maintenance hydraulic jacks to form a maintenance space, so that the rotating device at the bottom of the furnace body can be repaired, thereby improving the maintenance speed and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a stereogram of the present invention;

[0024] Figure 2 is an exploded view of the present invention;

[0025] Figure 3 is a cross-sectional view of the present invention;

[0026] Figure 4 yes Figure 3 A magnified view of part A in FIG.

[0027] Figure 5 It is a stereoscopic diagram of the rotary power mechanism in the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described in conjunction with the accompanying drawings.

[0029] See also Figures 1 to 5 The present invention provides a closed rotary ferroalloy ore furnace, comprising a fixed furnace cover 1, a furnace body 2, a rotary power mechanism 3, and a material surface loosening mechanism 4; the fixed furnace cover 1 is respectively provided with a chimney connecting hole 5, a plurality of electrode tube mounting holes 6, and a plurality of feed holes 7, the exhaust chimney is connected and installed through the chimney connecting hole 5, the electrode tube is installed and connected through the electrode tube mounting hole 6, and the feed tube is installed and connected through the feed hole 7. The installation of the exhaust chimney, the electrode tube, and the feed tube belongs to the technology well known to those skilled in the art, and will not be illustrated here in conjunction with the drawings.

[0030] The fixed furnace cover 1 is suspended by a furnace cover hanging ring device 8 and installed at the furnace mouth of the furnace body 2. The fixed furnace cover 1 is fixedly located on the electric furnace building and is insulated. At the same time, a sealing structure 9 is provided between the fixed furnace cover 1 and the furnace body 2; the sealing structure 9 includes a sealing connection plate 10, a sealing gasket 11, and a furnace body sealing groove 12 provided on the end of the furnace body 2, and a sealing filling sand 13 is installed in the furnace body sealing groove 12. The sealing connection plate 10 forms a sealed fixed connection with the fixed furnace cover 1 through the sealing gasket 11, and is provided with an annular sealing ring 14 extending into the sealing filling sand 13; this sealing method is simple, reliable and safe, and at the same time, a relatively rotatable connection is formed between the fixed furnace cover 1 and the furnace body 2 under the premise of sealing.

[0031] The furnace body 2 is installed on the rotating power mechanism 3, and the rotating power mechanism 3 includes a base 15, a furnace body rotating load-bearing plate 16, and a furnace body rotating reducer 17. The base 15 is provided with a rotating central axis 18 for installing the furnace body rotating load-bearing plate 16. The furnace body 2 is installed on the furnace body rotating load-bearing plate 16. The furnace body rotating reducer 17 is installed on the base 15 and can drive the furnace body rotating load-bearing plate 16 to rotate; the furnace body rotating reducer 17 can rotate and drive the furnace body rotating load-bearing plate 16, thereby driving the furnace body 2 to rotate relative to the fixed furnace cover 1, and the sealing structure 9 maintains a rotating sealed connection between the fixed furnace cover 1 and the furnace body 2.

[0032] The material surface loosening mechanism 4 includes a loosening reducer 19 and a water-cooling rotating rod 20. The material surface loosening mechanism 4 is installed on the platform of the electric furnace building. One end of the water-cooling rotating rod 20 is rotatably connected to the loosening reducer 19, and the other end passes through the fixed furnace cover 1 and is provided with a plurality of loosening teeth 21. The water-cooling rotating rod 20 is sealed and rotatably connected to the fixed furnace cover 1; wherein the end of the water-cooling rotating rod 20 rotatably connected to the loosening reducer 19 is provided with an inlet and return water rotating joint, and an inlet and return water cooling water channel is provided inside the water-cooling rotating rod 20, so as to ensure that the water-cooling rotating rod 20 can withstand the high temperature in the furnace when it is extended into the furnace body 2 and ensure its normal The use of the water inlet and return rotating joint and the water inlet and return structure are technical means well known to those skilled in the art and will not be described in detail. When the material surface needs to be loosened, the water-cooled rotating rod 20 rotates and the multiple loosening teeth 21 on its end cut into the material layer, thereby cooperating with the rotation of the furnace body 2 to loosen the material surface. When the material surface does not need to be loosened, the water-cooled rotating rod 20 rotates to make the loosening teeth 21 turn upward and stop working, reducing losses. A device for measuring the looseness of the material surface is installed on the fixed furnace cover 1. According to the signal of the looseness of the material surface, the number of revolutions of the furnace body 2 is adjusted as appropriate, and the material surface is loosened using the material surface loosening mechanism 4, thereby achieving more intelligent control and operation.

[0033] Furthermore, the furnace body rotating load-bearing plate 16 includes a rotating load-bearing frame 16-1 and a transmission connecting plate 16-2. The center of the rotating load-bearing frame 16-1 is connected to the rotating center axis 18 through a bearing assembly, and the outer circumferential edge is fixedly connected to the transmission connecting plate 16-2. The bottom end of the furnace body 2 is fixed to the transmission connecting plate 16-2. The circumference of the transmission connecting plate 16-2 is provided with a gear transmission assembly 16-3. The furnace body rotating reducer 17 on the base 15 is meshed and transmitted with the gear transmission assembly 16-3 on the transmission connecting plate 16-2 through a motor gear; wherein the operation of the furnace body rotating reducer 17 is synchronized through the control center.

[0034] Furthermore, a plurality of supporting rotating wheels 22 are provided between the bottom of the furnace body rotating load-bearing plate 16 and the base 15, and the supporting rotating wheels 22 are fixedly connected to the transmission connecting plate 16-2. The base 15 is provided with a circular track 15-1 for directional rotation of the plurality of supporting rotating wheels 22; the plurality of supporting rotating wheels 22 rotate along the circular track 15-1 as the furnace body rotating load-bearing plate 16 drives the furnace body 2 to rotate, so as to better cooperate with the furnace body rotating load-bearing plate 16 to provide rotational support for the furnace body 2.

[0035] Furthermore, a rotation positioning frame 23 is provided between the plurality of supporting rotating wheels 22 and the rotating central shaft 18 , and the rotating positioning frame 23 is connected to the rotating central shaft 18 via a bearing assembly; thereby, the stability of the supporting rotating wheels 22 in supporting rotation can be better improved.

[0036] Furthermore, the base 15 is provided with a plurality of maintenance hydraulic jacks 24, which can be correspondingly supported on the bottom end of the furnace body 2; a plurality of maintenance hydraulic jacks 24 are connected to an external hydraulic oil system and are used exclusively for lifting the furnace body, so that repairs can be carried out more conveniently once a failure of the rotating mechanism occurs; in order to facilitate the lifting problem during repair, the fixed furnace cover 1 is composed of a plurality of furnace cover plates 1-1 and furnace cover side plates 1-2, and there is a gap between two adjacent furnace cover plates 1-1 and between two furnace cover side plates 1-2. The flange plate 1-3 is used to seal the furnace cover 1-1 and the furnace cover side plate 1-2. When lifting and repairing, the furnace cover side plate 1-2 can be directly and quickly disassembled. At the same time, the rotating central axis 18 and the base 15 are also connected in a split manner. The load-bearing plate 16 can be raised and lowered synchronously with the rotation of the furnace body. When maintenance is required, the furnace body 2 can be lifted to one meter through multiple maintenance hydraulic jacks 24 to form a one-meter maintenance space, so that the rotating and load-bearing devices at the bottom of the furnace body can be repaired, thereby improving the maintenance speed and efficiency.

[0037] Furthermore, the fixed furnace cover 1 is also provided with a flue gas recovery connection hole 25, which is connected to an external CO recovery device through the flue gas recovery connection hole 25 on the fixed furnace cover 1 to prevent the CO generated by the electric furnace during the smelting process from burning in the furnace and becoming CO2 emissions. The change to a rotary closed ferroalloy furnace greatly reduces the CO2 emission index and solves the environmental protection problem at the same time. The purity of the CO gas generated during the smelting process reaches more than 70%, and the calorific value is 2400-2600 kcal; the closed production method can recover CO for comprehensive utilization, such as power generation, ethanol, methanol and other chemical products.

[0038] As a preferred embodiment of the present invention, three material surface loosening mechanisms 4 are provided, and two adjacent material surface loosening mechanisms 4 are arranged at an angle of 120 degrees with the center of the fixed furnace cover 1. The material surface loosening mechanisms 4 are evenly arranged around the circumference of the fixed furnace cover 1, which can better cooperate to loosen the material surface in the furnace body.

[0039] A closed rotating ferroalloy ore furnace provided in an embodiment of the present invention is introduced in detail above. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solution disclosed by the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A closed rotary ferroalloy ore furnace, comprising a fixed furnace cover and a furnace body, wherein the fixed furnace cover is provided with a chimney connection hole, a plurality of electrode tube mounting holes, and a plurality of feed holes; characterized in that: It also includes rotating power mechanism and material surface loosening mechanism; The fixed furnace cover is suspended by a furnace cover hanging ring device and installed at the furnace mouth of the furnace body, and a sealing structure is provided between the fixed furnace cover and the furnace body; the furnace body is installed on a rotating power mechanism, and the rotating power mechanism drives the furnace body to rotate relative to the fixed furnace cover, and the sealing structure maintains a sealed connection between the fixed furnace cover and the furnace body, and ensures normal rotation between the two; The material surface loosening mechanism is installed on the electric furnace installation platform and extends from the fixed furnace cover into the furnace body, so as to stir the material surface in the furnace body. The material surface loosening mechanism extends through the fixed furnace cover for sealing connection; The rotating power mechanism includes a base, a furnace body rotating load-bearing plate, and a furnace body rotating reducer. The base is provided with a rotating central axis for mounting the furnace body rotating load-bearing plate. The furnace body is mounted on the furnace body rotating load-bearing plate. The furnace body rotating reducer is mounted on the base and can drive the furnace body rotating load-bearing plate to rotate. The material surface loosening mechanism comprises a loosening reducer and a water cooling rotating rod, one end of the water cooling rotating rod is rotatably connected to the loosening reducer, and the other end passes through the fixed furnace cover and is provided with a plurality of loosening teeth, and the water cooling rotating rod is sealed and rotatably connected to the fixed furnace cover; The furnace body rotating load-bearing plate includes a rotating load-bearing frame and a transmission connection plate. The center of the rotating load-bearing frame is connected to the rotating central axis through a bearing assembly, and the outer circumferential edge is fixedly connected to the transmission connection plate. The bottom end of the furnace body is fixed to the transmission connection plate. The circumference of the transmission connection plate is provided with a gear transmission assembly. The furnace body rotating reducer on the base is meshed and driven through the motor gear and the gear transmission assembly on the transmission connection plate. A plurality of maintenance hydraulic jacks are arranged on the base, and the maintenance hydraulic jacks can be correspondingly supported on the bottom end of the furnace body.

2. A closed rotary ferroalloy ore furnace according to claim 1, characterized in that: The sealing structure includes a sealing connection plate, a sealing gasket, and a furnace body sealing groove arranged on the end of the furnace body. The furnace body sealing groove is filled with sealing sand. The sealing connection plate is sealed and fixedly connected to the fixed furnace cover through the sealing gasket, and is provided with an annular sealing ring extending into the sealing sand.

3. The closed rotary ferroalloy ore furnace according to claim 1, characterized in that: A plurality of supporting rotating wheels are arranged between the bottom of the furnace body rotating load-bearing plate and the base, the supporting rotating wheels are fixedly connected to the transmission connecting plate, and a circular track for directional rotation of the plurality of supporting rotating wheels is arranged on the base.

4. The closed rotary ferroalloy ore furnace according to claim 3, characterized in that: A rotating positioning frame is provided between the plurality of supporting rotating wheels and the rotating central axis, and the rotating positioning frame is connected to the rotating central axis through a bearing assembly.

5. A closed rotary ferroalloy ore furnace according to claim 1 or 2, characterized in that: The fixed furnace cover is also provided with a smoke recovery connection hole. The fixed furnace cover includes a plurality of furnace cover plates and furnace cover side plates. Flange plates are used to seal and connect two adjacent furnace cover plates, two furnace cover side plates, and between the furnace cover plates and the furnace cover side plates.

6. The closed rotary ferroalloy submerged arc furnace according to claim 1, characterized in that: The material surface loosening mechanisms are provided in three numbers, and two adjacent material surface loosening mechanisms are arranged with the center of the fixed furnace cover at an angle of 120 degrees.

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