Discharging mechanism of electric arc furnace

Abstract

The utility model relates to the technical field of metallurgy, and discloses an electric arc furnace discharging mechanism which comprises a material guiding part arranged at the bottom of an electric arc furnace body, a flow adjusting part is arranged at the bottom of the material guiding part in a communicating mode, and a discharging furnace mouth is arranged at the bottom of the flow adjusting part in a communicating mode. Wherein two split type adjusting blocks are movably arranged in the flow adjusting part, and in the initial state, the two adjusting blocks are tightly attached to block a communicating opening between the material guiding part and the flow adjusting part; during discharging, the linear driving mechanism controls the two adjusting blocks to be far away from each other, and materials fall down along a gap between the two adjusting blocks and enter the discharging furnace mouth. According to the utility model, layered discharge can be realized, the purity of clinker is improved, the dissipation of harmful gas is reduced, and the discharge flow is flexibly controlled, so that the smelting efficiency and the product quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical technical field especially relates to a material discharging mechanism of arc furnace. BACKGROUND

[0002] In the field of metallurgy and material processing, arc furnace is a commonly used smelting equipment, widely used in the melting and refining process of metal and its alloy. The traditional arc furnace usually sets the discharge nozzle at the side or upper part of the furnace body, and realizes the discharge by tilting the furnace body or opening the nozzle. However, this design has the following significant problems in practical application:

[0003] Firstly, raw materials and clinkers are mixed and discharged, because in the smelting process, the materials in the furnace often show a layered state, the upper layer may exist uncompletely melted raw materials, and the lower layer is completely melted clinker. The traditional side or upper discharge mode is difficult to realize layered discharge, resulting in the discharge of raw materials and clinker together, reducing the purity of clinker and affecting the quality of final product.

[0004] Secondly, harmful gas and dust are dispersed: because the discharge port is located at the side or upper part of the furnace body, the high-temperature melt in the furnace contacts with air in a large area during discharge, which easily produces a large amount of harmful gas (such as CO, SO2, etc.) and dust, not only polluting the environment, but also increasing the difficulty and cost of waste gas treatment.

[0005] In addition, the existing arc furnace discharge mechanism mostly adopts simple gate plate or tilting design, which is difficult to realize the adjustment of flow, especially in the process of needing to control the discharge speed or segmented discharge, the operation flexibility is insufficient. Therefore, an arc furnace discharge mechanism capable of realizing layered discharge, reducing harmful gas dispersion, and flexibly controlling the discharge flow, so as to improve the smelting efficiency and product quality is urgently needed. SUMMARY

[0006] The utility model aims at providing a kind of material discharging mechanism of arc furnace, can realize layered discharge, improve the purity of clinker, reduce harmful gas dispersion, and flexibly control discharge flow, so as to improve the smelting efficiency and product quality.

[0007] The utility model adopts the following technical solutions:

[0008] A kind of material discharging mechanism of arc furnace, including the guide material part being set in the bottom of arc furnace furnace body, the guide material part bottom is directly set with flow regulating part, and the flow regulating part bottom is directly set with discharge nozzle;Wherein the flow regulating part interior movably is provided with two split type regulating blocks, in initial state, two the regulating block is tightly attached and blocks the through opening between the guide material part and the flow regulating part;When discharging, by linear drive mechanism control two the regulating block is far away from each other, material falls along the gap between two the regulating block, and enters the discharge nozzle.

[0009] Preferably, two said adjusting blocks are each provided with a slope on the side in contact with each other from the bottom.

[0010] Preferably, the bottom of said material guiding part extends into said flow adjusting part, and said adjusting blocks are provided with accommodating grooves on the top; when two said adjusting blocks are in close contact, said material guiding part is tightly enclosed in said accommodating grooves.

[0011] Preferably, there is a gap between the bottom of said accommodating grooves and the top end of said slope, forming a sealed buffer zone.

[0012] Preferably, the side in contact with each other of two said adjusting blocks is tightly connected from top to bottom by complementary concave-convex structures.

[0013] Preferably, said flow adjusting part is provided with a sliding rail, and the bottom of said adjusting blocks is provided with a sliding sleeve in sliding connection with said sliding rail.

[0014] Preferably, the size of said discharge nozzle and the size of the through port of said flow adjusting part are not less than the size formed when two said adjusting blocks are separated to the limit state.

[0015] Preferably, the size of said discharge nozzle and the size of the through port of said flow adjusting part are greater than the size formed when two said adjusting blocks are separated to the limit state.

[0016] Preferably, the size of said discharge nozzle and the size of the through port of said flow adjusting part are greater than the size of said material guiding part and the size of the through port of said flow adjusting part.

[0017] Preferably, said material guiding part and said discharge nozzle are coaxially arranged at the upper and lower ends of said flow adjusting part.

[0018] Compared with the prior art, the utility model has the advantages that: the utility model discloses a discharge mechanism arranged at the bottom of the electric arc furnace body, which can realize furnace bottom discharge, avoid the phenomenon that the upper layer raw material is discharged together with the clinker, and improve the purity of the clinker; in addition, the furnace bottom discharge also reduces the escape of dust and harmful gas, improves the working environment; at the same time, the furnace bottom discharge reduces the risk of high-temperature clinker splashing, improves the safety, reduces the mechanical impact and thermal shock on the furnace lining, prolongs the service life of the refractory material in the furnace body, and through the arrangement of two movable adjusting blocks in the flow adjusting part, the discharge flow of the clinker can be adjusted by controlling the moving distance of the adjusting blocks, and the flexibility of the clinker discharge is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the front view of the embodiment of the application;

[0020] Figure 2 It is the sectional view of the flow adjusting part of the embodiment of the application;

[0021] Figure 3 Structure diagram of the adjusting block of the embodiment of the present application;

[0022] Figure 4 Flow regulating part cross-sectional view of the adjusting block of the second state of the embodiment of the present application. DETAILED DESCRIPTION

[0023] The utility model will be made a clear and complete explanation of the present application combined with the drawings and embodiments:

[0024] As Figures 1 to 4 shown, the utility model discloses a material discharging mechanism of electric arc furnace, including the guide material portion 2 of setting in the electric arc furnace furnace body 1 bottom, the electric arc furnace furnace body 1 sets up on the support frame 3, and the guide material portion 2 bottom is directly set up with the flow regulating part 4, and the flow regulating part 4 is arranged perpendicularly with the guide material portion 2, and the flow regulating part 4 bottom is directly set up with the material discharging nozzle 5, and the guide material portion 2 and the material discharging nozzle 5 are coaxially arranged in the upper and lower ends of the flow regulating part 4;Wherein the flow regulating part 4 inside movably sets up two split type adjusting blocks 6, in the initial state, two adjusting blocks 6 tightly adhere to the guide material portion 2 and the flow regulating part 4 between the through hole plugging, avoid the material falling;When discharging, the two adjusting blocks 6 controlled by the linear drive mechanism are away from each other, and the material falls along the gap between the two adjusting blocks 6 and enters the material discharging nozzle 5 to complete the discharge;Through the discharge of the electric arc furnace furnace bottom, on the one hand, it can avoid the raw material from being discharged together with the clinker, improve the purity of the clinker, reduce the dust and harmful gas emission, and improve the working environment, and at the same time, the discharge of the furnace bottom reduces the risk of high-temperature clinker spatter, improves the safety, and reduces the mechanical impact and thermal shock on the furnace lining, prolongs the service life of the refractory material;And the discharge of the furnace bottom can also quickly complete the discharge blowing time of the clinker, improve the production efficiency. On the other hand, the discharge of the furnace bottom, in cooperation with the setting of the flow regulating part 4 and the adjusting block 6, facilitates the adjustment of the clinker discharge flow, and improves the flexibility of the clinker discharge.

[0025] In the embodiment, the linear drive mechanism for driving the movement of the two adjusting blocks 6 can adopt a hydraulic cylinder or a pneumatic cylinder or an electric push rod;Preferably, a hydraulic cylinder 7 is used, to avoid the influence of high temperature on the hydraulic cylinder 7, a high-temperature-resistant material can be coated on the outside of the hydraulic cylinder 7, and a high-temperature-resistant connecting part is arranged at the telescopic end of the hydraulic cylinder 7, which is connected with the adjusting block 6 by extending into the flow regulating part 4. The connecting part can be made of ceramic composite material (such as SiC) or superalloy (such as TZM molybdenum alloy, tungsten-molybdenum alloy) to ensure that it is not affected by temperature. In addition, in the present example, the guide material portion 2 and the flow regulating part 4 are both provided with refractory material;The two adjusting blocks 6 are also made of refractory material, and the specific material is matched and selected by the person skilled in the art according to the different temperature resistance.

[0026] Further, the two adjusting blocks 6 are each inclinedly provided with a slope surface 8 from the bottom to the side where they contact each other. The slope surface 8 can form a gradually increasing discharging space under the two adjusting blocks 6 when the two adjusting blocks 6 are separated, thereby reducing the probability of the clinker falling in contact with the adjusting blocks 6, reducing the erosion of the adjusting blocks 6, prolonging the service life of the adjusting blocks 6, and increasing the gradually increasing discharging space by opening a conical cavity upward at the bottom of the two adjusting blocks 6. In addition, the bottom of the guide part 2 extends into the flow adjusting part 4, and the top of the adjusting block 6 is provided with a containing groove 9. When the two adjusting blocks 6 are in close contact, the guide part 2 is tightly enclosed in the containing groove 9 to form a seal for the guide part 2. As shown in Figure 4 the drawing, the guide part 2 extends upward from the discharge nozzle 5 into the flow adjusting part 4, and the bottom of the two adjusting blocks 6 is also provided with a containing groove. When the two adjusting blocks 6 are in close contact, the containing groove is enclosed outside the discharge nozzle 5. At this time, the upper and lower ends of the guide part 2 can be slightly spaced from the upper and lower ends of the flow adjusting part 4 to reduce the wear between the adjusting blocks 6 and the flow adjusting part 4 when the adjusting blocks 6 move.

[0027] In the containing groove 9, there is a gap between the bottom of the containing groove 9 and the top end of the slope surface 8 of the adjusting block 6, i.e., a certain distance between them, so as to form a sealing buffer zone, ensure that the two adjusting blocks 6 have sufficient sealing thickness when they are in contact, and ensure the sealing effect. In addition, the side where the two adjusting blocks 6 contact each other is tightly connected from top to bottom by complementary concave-convex structures, i.e., one adjusting block 6 is convexly provided, and the corresponding side of the other adjusting block 6 is concavely provided. By providing a plurality of concave-convex structures, the contact area of the two adjusting blocks 6 can be increased to ensure the sealing effect, the connecting gap between the two adjusting blocks 6 is changed into a curved shape, the leakage of the molten metal can be effectively reduced, and the sealing effect can be improved. Please refer to Figure 3 the curved line body part in the front view.

[0028] Further, the flow adjusting part 4 is provided with a sliding rail 10, and the bottom of the adjusting block 6 is provided with a sliding sleeve 11 in sliding connection with the sliding rail 10. The sliding rail 10 can be provided at the bottom end or the top end of the flow adjusting part 4. The sliding of the sliding sleeve 11 on the sliding rail 10 can provide guiding support for the movement of the adjusting block 6, and ensure the stable movement of the adjusting block 6. The sliding sleeve 11 and the sliding rail 10 are made of high-temperature-resistant materials, and the materials can be selected as described above when the connecting part is made.

[0029] Further, the size of the outlet nozzle 5 and the size of the through opening of the flow regulating part 4 in the embodiment are not less than the size of the top formed when the two regulating blocks 6 are separated to the limit state, and preferably the size of the through opening is greater than the size of the top formed when the two regulating blocks 6 are separated to the limit state, so as to ensure effective receiving of the falling clinker and prevent the clinker from falling outside when the clinker is discharged. In addition, the size of the outlet nozzle 5 and the size of the through opening of the flow regulating part 4 are greater than the size of the through opening of the flow regulating part 4 and the size of the through opening of the material guiding part 2, so as to ensure smooth entry of the clinker into the outlet nozzle 5 and discharge of the clinker by the outlet nozzle 5.

[0030] When the material guiding part 2 is used, the two regulating blocks 6 are tightly abutted during normal operation, and the outlet of the material guiding part 2 is tightly enclosed in the accommodating groove 9 formed on the top of the two regulating blocks 6 to seal the outlet. When discharging is needed, the two regulating blocks 6 are controlled to move away from each other, and at this time the clinker will flow down along the gap between the two regulating blocks 6 and enter the outlet nozzle 5 below, and then be discharged by the outlet nozzle 5. By controlling the distance between the two regulating blocks 6, the falling flow of the clinker can be controlled, so as to meet different discharge requirements and enhance the practicability of the utility model.

[0031] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A discharge mechanism for an electric arc furnace, characterized in that: The device includes a material guide section located at the bottom of the electric arc furnace body. A flow regulating section is connected to the bottom of the material guide section, and a discharge nozzle is connected to the bottom of the flow regulating section. The flow regulating section contains two separate regulating blocks. In the initial state, the two regulating blocks are tightly fitted together to block the opening between the material guide section and the flow regulating section. During discharge, a linear drive mechanism controls the two regulating blocks to move away from each other, and the material falls along the gap between the two regulating blocks and enters the discharge nozzle.

2. The electric arc furnace discharge mechanism according to claim 1, characterized in that: Both of the aforementioned adjusting blocks are inclined from the bottom toward the side where they come into contact with each other, with a slope.

3. The electric arc furnace discharge mechanism according to claim 2, characterized in that: The bottom of the material guiding section extends into the flow regulating section, and the top of the regulating block is provided with a receiving groove; when the two regulating blocks are in close contact, the material guiding section is tightly surrounded in the receiving groove.

4. The electric arc furnace discharge mechanism according to claim 3, characterized in that: There is a gap between the bottom of the receiving groove and the top of the slope, forming a sealed buffer zone.

5. The electric arc furnace discharge mechanism according to claim 4, characterized in that: The two adjustment blocks are tightly connected from top to bottom by a complementary concave-convex structure on their contact surfaces.

6. The electric arc furnace discharge mechanism according to claim 3, characterized in that: The flow regulating part is provided with a slide rail, and the bottom of the regulating block is provided with a sliding sleeve that is slidably connected to the slide rail.

7. The electric arc furnace discharge mechanism according to claim 1, characterized in that: The size of the discharge nozzle and the flow regulating part's guide port is not less than the size formed when the two regulating blocks are separated to their limit state.

8. The electric arc furnace discharge mechanism according to claim 7, characterized in that: The size of the discharge nozzle and the flow regulating part's guide port is greater than the size formed when the two regulating blocks are separated to their limit state.

9. The electric arc furnace discharge mechanism according to claim 8, characterized in that: The size of the discharge nozzle and the flow regulating part's guide port is larger than the size of the material guiding part and the flow regulating part's guide port.

10. The electric arc furnace discharge mechanism according to claim 1, characterized in that: The material guiding section and the discharge nozzle are coaxially arranged at the upper and lower ends of the flow regulating section.

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