Electric arc furnace with furnace cover long in service life

Abstract

The utility model discloses an electric arc furnace with a furnace cover long in service life, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with an electric arc furnace body, the electric arc furnace body is rotatably connected with a cover body, the cover body is fixedly connected with a steel plate type water-cooled furnace cover, the steel plate type water-cooled furnace cover is provided with an electrode hole, and the steel plate type water-cooled furnace cover is fixedly connected with the bottom plate. According to the device, the central area of the furnace cover is changed into the steel plate type water-cooled furnace cover, and only the high-temperature-resistant insulating sleeve is arranged on the outer ring of the graphite electrode, so that the chrome corundum refractory material is greatly saved, the refractory material is cooled by circulating water, and the service life of the furnace cover is prolonged; the service life of the center cover is remarkably prolonged, the center cover is simpler and more convenient to replace and adjust, the downtime is shortened, the use cost of the center cover is greatly reduced, the problems that the center cover of the electric arc furnace is short in service life, high in manufacturing cost, troublesome to replace and adjust and the like are solved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric arc furnace technical field, especially relate to a electric arc furnace that furnace cover service life is long. BACKGROUND

[0002] In the steel product capacity, more than one third is obtained through melting - oxidation - reduction - refining - casting - deep processing of steel scrap, wherein the smelting equipment mostly adopts three-phase electric arc furnace, and the feeding mode of the electric arc furnace develops from the initial furnace door feeding to the furnace cover rotating feeding, conveyor preheating horizontal feeding and vertical preheating feeding. The latter two are mostly used for continuous large-scale production, and the most used for special steel and metal casting is still the furnace cover rotating feeding. The material used for the rotatable furnace cover of the electric arc furnace is originally refractory material, which is replaced by the coil type water-cooled furnace cover due to high cost, short service life, safety hazards such as collapse into high-temperature metal solution in the later period, but the central area of the furnace cover still uses refractory material, and the above problems in this area have not been solved. China has disclosed "a furnace cover of electric arc furnace", the application number of which is "CN201020161155.0", which covers the electric arc furnace through the furnace cover of the electric arc furnace, and can perform closed reaction and heating when producing high-titanium slag, which is beneficial to environmental protection and cost saving. However, it cannot make the center cover replacement and adjustment more simple and convenient, thereby cannot shorten the downtime, and it cannot greatly save the chromium corundum refractory material so that the part of the refractory material is cooled by circulating water, thereby cannot greatly reduce the use cost of the center cover. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a furnace cover service life is long electric arc furnace, the central area of the furnace cover is changed into the steel plate type water-cooled furnace cover, and the high-temperature insulation sleeve is only arranged outside the graphite electrode, which not only greatly saves the chromium corundum refractory material, but also makes the part of the refractory material be cooled by circulating water, significantly improves the service life of the center cover, makes the center cover replacement and adjustment more simple and convenient, shortens the downtime, greatly reduces the use cost of the center cover, solves the problems of low service life, high cost, and troublesome replacement and adjustment of the center cover of the electric arc furnace, and is beneficial to improving the production efficiency.

[0004] The utility model discloses still provide with above-mentioned one furnace cover service life long's electric arc furnace, include: bottom plate, the upper surface fixed connection of bottom plate has electric arc furnace body, the rotation is connected with the cover on electric arc furnace body, the fixed connection of steel sheet type water cooled furnace cover is established on the cover, the electrode hole is established on steel sheet type water cooled furnace cover, the outer surface fixed connection of electrode hole has high temperature resistant insulating sleeve, the water pipe is established on the cover, and the device changes the steel sheet type water cooled furnace cover to furnace cover center area, only configures high temperature resistant insulating sleeve at the outer ring of graphite electrode, not only the chromium corundum refractory is saved greatly, makes this part of refractory to get the circulating water cooling, the service life of center cover is improved significantly, and the center cover becomes more simple and convenient to replace and adjust, shortens the downtime, and the service cost of center cover is reduced greatly, solves electric arc furnace center cover life low, the problem such as high cost, replacement and adjustment are troublesome, is favorable for improving production efficiency.

[0005] According to the electric arc furnace with long service life of furnace cover, the cover body is a rotatable furnace cover, and the rotatable design makes the furnace cover opening and closing more convenient and flexible, facilitating the operation in the furnace.

[0006] According to the electric arc furnace with long service life of furnace cover, the high-temperature-resistant insulating sleeve is fixedly connected with the steel sheet type water cooled furnace cover, and the material of the high-temperature-resistant insulating sleeve is polyimide.

[0007] According to the electric arc furnace with long service life of furnace cover, the material of the steel sheet type water cooled furnace cover is medium-pressure boiler steel plate, and the steel sheet type water cooled furnace cover is located at the center of the cover body.

[0008] According to the electric arc furnace with long service life of furnace cover, the steel sheet type water cooled furnace cover is provided with an inlet and outlet water pipe, the inlet and outlet water pipe is fixedly connected with the cover body, the water cooling circulation system of the center cover is independently formed and integrated into the large coil type water cooled furnace cover circulation system, and the outlet water pipe of the steel sheet type water cooled cover is arranged at the highest position of the center cover during the tapping of the electric arc furnace; the inlet water pipe is arranged at the maximum diameter of the centerline cover, so that water flows tangentially into the furnace cover, and the water temperature in the furnace cover is uniform without overheating area.

[0009] According to the electric arc furnace with long service life of furnace cover, the water pipe is fixedly connected with a connecting flange at one end away from the cover body, so as to ensure the stability of the connection, and the material of the water pipe is steel, which can prolong the service life.

[0010] The utility model discloses an electric arc furnace with long service life of furnace cover, the outer surface of bottom plate is fixedly connected with the mounting seat, be provided with the mounting hole on the mounting seat, can stably install the whole device.

[0011] Beneficial effects

[0012] 1, compared with prior art, the novel electric arc furnace with long service life of furnace cover, the device changes the steel plate type water cooled furnace cover in the center area of furnace cover, and only high temperature resistant insulation sleeve is arranged at the outer circle of graphite electrode, not only the chromium corundum refractory is greatly saved, so that the part of refractory is cooled by circulating water, the service life of center cover is improved, the center cover is replaced and adjusted more simple and convenient, the downtime is shortened, the service cost of center cover is greatly reduced, the problems of low service life, high cost and troublesome replacement and adjustment of center cover of electric arc furnace are solved, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further illustrated below in combination with the drawings and examples;

[0014] Figure 1 It is the front view structural drawing of the utility model electric arc furnace with long service life of furnace cover;

[0015] Figure 2 It is the side view structural drawing of the utility model electric arc furnace with long service life of furnace cover;

[0016] Figure 3 It is the cover body connecting structure schematic view of the utility model electric arc furnace with long service life of furnace cover;

[0017] Figure 4 It is the steel plate type water cooled furnace cover connecting structure schematic view of the utility model electric arc furnace with long service life of furnace cover.

[0018] Legend:

[0019] 1, bottom plate;2, electric arc furnace body;3, cover body;4, steel plate type water cooled furnace cover;5, electrode hole;6, high temperature resistant insulation sleeve;7, water pipe. DETAILED DESCRIPTION

[0020] This part will describe the specific embodiment of the utility model in detail, and the preferred embodiment of the utility model is shown in the drawings, and the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0021] Reference Figures 1-4The utility model discloses an electric arc furnace with long service life of furnace cover, which comprises a bottom plate 1, the upper surface of the bottom plate 1 is fixedly connected with an electric arc furnace body 2, the electric arc furnace body 2 is rotatably connected with a cover body 3, the cover body 3 is a rotatable furnace cover, the cover body 3 is a coil pipe type water cooling furnace cover in particular, the cover body 3 is fixedly connected with a steel plate type water cooling furnace cover 4, the steel plate material selects medium pressure boiler steel plate, the thickness of the steel plate is determined according to the water pressure intensity of the cold zone and the diameter of the center cover, the center cover water cooling circulation system is independently formed and is incorporated into the large coil pipe type water cooling furnace cover circulation system, the water outlet pipe of the steel plate type water cooling cover is arranged at the highest position of the center cover when the electric arc furnace is tapping, and the water inlet pipe is arranged at the maximum diameter of the center cover, so that water flows tangentially into the furnace cover, the water temperature in the furnace cover is uniform and there is no overheating area, an electrode hole 5 is arranged on the steel plate type water cooling furnace cover 4, a high-temperature-resistant insulating sleeve 6 is fixedly connected to the outer surface of the electrode hole 5, and an operation gap of 30-50mm is left according to the diameter of the graphite electrode; the thickness of the refractory insulating sleeve is selected as the best value according to the highest voltage grade of the electric arc furnace transformer, and the other parts of the center area are all designed as the steel plate type water cooling furnace cover, and a water pipe 7 is arranged on the cover body 3.

[0022] The high-temperature-resistant insulating sleeve 6 is fixedly connected with the steel plate type water cooling furnace cover 4 and is used for fixing the high-temperature-resistant insulating sleeve 6, the material of the high-temperature-resistant insulating sleeve 6 is polyimide, the material of the steel plate type water cooling furnace cover 4 is medium pressure boiler steel plate, the steel plate type water cooling furnace cover 4 is located at the center of the cover body 3, water inlet and outlet pipes are arranged on the steel plate type water cooling furnace cover 4, the water outlet pipe is arranged at the highest position of the center cover when the electric arc furnace is tapping, and the water inlet pipe is arranged at the maximum diameter of the center cover, so that water flows tangentially into the furnace cover, the water temperature in the furnace cover is uniform and there is no overheating area, the water inlet and outlet pipes are fixedly connected with the cover body 3, the center cover water cooling circulation system is independently formed and is incorporated into the large coil pipe type water cooling furnace cover circulation system, one end of the water pipe 7 away from the cover body 3 is fixedly connected with a connecting flange and is used for connecting a water supply system, the material of the water pipe 7 is steel, the outer surface of the bottom plate 1 is fixedly connected with a mounting seat, mounting holes are arranged on the mounting seat and are used for mounting devices.

[0023] Working principle: in the production, the center cover of the cover body (3) is a steel plate type water cooling furnace cover (4), the steel plate type water cooling furnace cover (4) is only configured with a high-temperature-resistant insulating sleeve 6 on the electrode hole (5) that is the outer circle of the graphite electrode, the center cover water cooling circulation system is independently formed and is incorporated into the large coil pipe type water cooling furnace cover circulation system, the water outlet pipe of the steel plate type water cooling cover 6 is arranged at the highest position of the center cover when the electric arc furnace is tapping, and the water inlet pipe is arranged at the maximum diameter of the center cover, so that water flows tangentially into the furnace cover, the water temperature in the furnace cover is uniform and there is no overheating area, the cover body (3) is connected with a water circulation system through the water pipe (7).

[0024] The utility model is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. An electric arc furnace with long service life of the roof, characterized in that, Include: The upper surface of the bottom plate (1) is fixedly connected with the electric arc furnace body (2), the electric arc furnace body (2) is rotatably connected with the cover (3), the cover (3) is fixedly connected with the steel plate water cooled cover (4), the steel plate water cooled cover (4) is provided with electrode hole (5), the outer surface of the electrode hole (5) is fixedly connected with the high temperature resistant insulation sleeve (6), the cover (3) is provided with water pipe (7).

2. The electric arc furnace according to claim 1, wherein The cover (3) is a rotatable cover, and the cover (3) is a coil pipe type water cooled cover.

3. The electric arc furnace according to claim 1, wherein The high temperature resistant insulation sleeve (6) is fixedly connected with the steel plate water cooled cover (4), and the material of the high temperature resistant insulation sleeve (6) is polyimide.

4. The electric arc furnace according to claim 1, wherein The material of the steel plate water cooled cover (4) is medium pressure boiler steel plate, and the steel plate water cooled cover (4) is located at the center of the cover (3).

5. The electric arc furnace according to claim 1, wherein The steel plate water cooled cover (4) is provided with inlet and outlet water pipe, and the inlet and outlet water pipe is fixedly connected with the cover (3).

6. The electric arc furnace according to claim 1, wherein The end of the water pipe (7) away from the cover (3) is fixedly connected with the connecting flange, and the material of the water pipe (7) is steel.

7. The electric arc furnace according to claim 1, wherein The outer surface of the bottom plate (1) is fixedly connected with the mounting seat, and the mounting hole is arranged on the mounting seat.

Images