Separated rotary electric arc furnace

Abstract

The utility model relates to a separated rotary electric arc furnace which comprises an upper furnace body and a lower furnace body, and the lower furnace body is connected with a tilting mechanism. The lower furnace body is provided with an annular shoulder and comprises a first lower furnace section located above the annular shoulder and a second lower furnace section located below the annular shoulder, the upper furnace body covers the first lower furnace section, and the bottom end of the upper furnace body is placed on the annular shoulder. And an annular gap for preventing the upper furnace body from interfering with the first lower furnace section when the lower furnace body tilts is formed between the inner wall of the upper furnace body and the outer wall of the first lower furnace section. According to the utility model, when the furnace body tilts, only the lower furnace body needs to be independently tilted, a tilting platform is not designed, and a plurality of devices do not need to be subjected to tilting operation design, so that the tapping and sand filling operations are simple and reliable, and the tilting load and energy consumption are greatly reduced; based on the structural design, the electric arc furnace is simpler and more reasonable in overall structure, dynamic and static separation is achieved, the equipment cost investment is remarkably reduced, and the production safety coefficient is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric furnace steelmaking, and particularly relates to a separated rotary electric arc furnace. BACKGROUND

[0002] At present, the electric arc furnace equipment form tends to be mature and fixed, and is basically evolved from top charging electric furnace, shaft furnace and horizontal charging electric furnace and the like. Most of the electric furnaces need to tilt front and back due to no slag tapping and sand filling operation, the furnace cover is directly placed on the three-dimensional body, which inevitably causes the furnace cover to also need to tilt front and back with the furnace body, but since the electrode is inserted into the furnace from the electrode hole in the center of the furnace cover, the electrode also must tilt (if the electrode is lifted above the furnace cover, the electrode lifting stroke is too high, and the heat radiation of the electrode greatly shortens the service life of the furnace top equipment), finally, the conductive cross arm and the electrode lifting device must tilt with the furnace body, which leads to the fact that the whole huge electric arc furnace main body equipment needs to follow, and the equipment must be very safe and reliable, otherwise, once a fault occurs, there will be great risk. The bearing of all the above-mentioned equipment is borne by the tilting platform, which requires the tilting platform to have sufficient strength and rigidity, and also must ensure the machining precision to install other equipment, and the equipment cost is very high. SUMMARY

[0003] The utility model relates to a separated rotary electric arc furnace, and can at least solve part of defects of the prior art.

[0004] The utility model relates to a separated rotary electric arc furnace, and can at least solve part of defects of the prior art.

[0005] The lower furnace body is provided with an annular shoulder portion and comprises a first lower furnace section above the annular shoulder portion and a second lower furnace section below the annular shoulder portion, the upper furnace body covers the first lower furnace section and rests on the annular shoulder portion at the bottom end, and an annular gap is formed between the inner wall of the upper furnace body and the outer wall of the first lower furnace section to prevent the upper furnace body from interfering with the first lower furnace section when the lower furnace body tilts.

[0006] As one of the embodiments, the bottom end of the upper furnace body is formed with an annular skirt plate gradually expanding from top to bottom, and the annular skirt plate rests on the annular shoulder portion.

[0007] As one of the embodiments, the upper furnace body comprises an upper furnace section and a furnace cover, and the furnace cover is detachably arranged on the top of the upper furnace section.

[0008] As one of the embodiments, the furnace cover is provided with a lifting structure.

[0009] As one of the embodiments, the furnace cover comprises a first water cooling frame and a plurality of water cooling plates detachably mounted on the first water cooling frame.

[0010] As one of the embodiments, the upper furnace section comprises a second water-cooled frame and a plurality of water-cooled furnace walls detachably mounted on the second water-cooled frame.

[0011] As one of the embodiments, the second lower furnace section comprises a concentric zone coaxial with the first lower furnace section and an eccentric zone located on the side of the concentric zone away from the tilting mechanism, and a tapping hole is arranged in the eccentric zone.

[0012] As one of the embodiments, the annular shoulder comprises an eccentric zone cover closing the top opening of the eccentric zone and an ear seat arranged on the furnace wall of the concentric zone.

[0013] As one of the embodiments, a sand filling hole is arranged on the eccentric zone cover.

[0014] As one of the embodiments, the inner wall of the second lower furnace section is provided with a refractory layer.

[0015] The utility model has at least the following beneficial effects:

[0016] In the utility model,

[0017] In the utility model, the furnace body is designed as a split structure combined by the upper furnace body and the lower furnace body, and through the structural cooperation of the upper furnace body and the lower furnace body, only the lower furnace body needs to be independently tilted when the furnace body is tilted, and the tilting platform design and many devices do not need to be tilted again, which avoids the large-scale movement caused by the tilting of other devices, makes the tapping and sand filling operation simple and reliable, greatly reduces the tilting load and energy consumption, and based on the structural design of the application, the overall structure of the electric arc furnace is more simple and reasonable, the dynamic and static separation is realized, the equipment cost investment is significantly reduced, and the production safety factor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0019] Figure 1 The structure schematic diagram of the separated rotary electric arc furnace provided by the embodiments of the utility model is shown in the figure.

[0020] Figure 2 The side view of the separated rotary electric arc furnace provided by the embodiments of the utility model is shown in the figure.

[0021] Figure 3 The tilting schematic diagram of the separated rotary electric arc furnace provided by the embodiments of the utility model is shown in the figure. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] For example, Figures 1-3 The utility model embodiment provides a kind of separated rotary electric arc furnace, including upper furnace body 11 and lower furnace body 12, and the lower furnace body 12 is connected with tilting mechanism;

[0024] The lower furnace body 12 is equipped with annular shoulder 123 and includes the first lower furnace section 121 above annular shoulder 123 and the second lower furnace section 122 below annular shoulder 123, and the upper furnace body 11 covers the first lower furnace section 121, and its bottom end rests on the annular shoulder 123, and the annular gap between the inner wall of the upper furnace body 11 and the outer wall of the first lower furnace section 121 prevents the upper furnace body 11 from interfering with the first lower furnace section 121 when the lower furnace body 12 tilts.

[0025] In one embodiment, for example, Figures 1-3 The upper furnace body 11 includes upper furnace section 111 and furnace cover 112, and the furnace cover 112 is detachably arranged on the top of the upper furnace section 111. Preferably, the furnace cover 112 and the upper furnace section 111 are detachably connected, including but not limited to flange connection and other ways, and the furnace cover 112 and the upper furnace section 111 can be hoisted together. Correspondingly, the furnace cover 112 is equipped with lifting structure 1121.

[0026] The cross section of the upper furnace body 11 is generally circular, and the above-mentioned furnace cover 112 is correspondingly a circular furnace cover 112, and the upper furnace section 111 is correspondingly a cylindrical furnace body with upper and lower openings.

[0027] Preferably, the upper furnace body 11 adopts water cooling structure to ensure its service life. The furnace cover 112 includes a first water cooling frame and a plurality of water cooling plates detachably mounted on the first water cooling frame, and the water cooling plates and the first water cooling frame can be fixed by bolts or other ways. The water cooling plates are detachably mounted on the first water cooling frame, which facilitates replacement in case of water leakage. The upper furnace section 111 includes a second water cooling frame and a plurality of water cooling walls detachably mounted on the second water cooling frame. The water cooling walls and the second water cooling frame can be fixed by bolts or other ways. The water cooling walls are detachably mounted on the second water cooling frame, which facilitates replacement in case of water leakage.

[0028] For example,Figures 1-3 The electrodes pass through the furnace cover 112 from top to bottom into the furnace body for smelting. Preferably, a central small furnace cover 1122 is arranged on the furnace cover 112, and electrode holes (generally three) are arranged on the central small furnace cover 1122 for the electrodes to pass through. The central small furnace cover 1122 is generally built by refractory materials.

[0029] The first lower furnace section 121 is open at the top, and the electrodes can pass through the first lower furnace section 121 into the second lower furnace section 122, and the electric furnace flue gas can pass through the first lower furnace section 121 into the upper furnace body 11. The flue gas outlet can be arranged on the upper furnace section 111 / furnace cover 112.

[0030] The first lower furnace section 121 is preferably coaxial with the upper furnace body 11. When the cross section of the upper furnace body 11 is circular, the cross section of the first lower furnace section 121 is also circular correspondingly.

[0031] In one embodiment, as shown in Figure 1 and Figure 3 The second lower furnace section 122 includes a concentric zone and an eccentric zone. The concentric zone is coaxial with the first lower furnace section 121, and the eccentric zone is located on the side of the concentric zone away from the tilting mechanism, and the tapping hole 124 is arranged in the eccentric zone. The tapping hole 124 is preferably located at the eccentric zone furnace bottom.

[0032] Further preferably, as shown in Figure 1 and Figure 3 The annular shoulder 123 includes an eccentric zone cover 1231 closing the top opening of the eccentric zone and an ear seat 1232 arranged on the wall of the concentric zone. In this way, the annular shoulder 123 is used not only to support the upper furnace body 11 but also to close the eccentric zone, simplifying the structure of the electric arc furnace and ensuring the normal application of the electric arc furnace.

[0033] Optionally, a sand filling hole is arranged on the eccentric zone cover 1231 for plugging the tapping hole 124 from the inside of the furnace body after tapping is completed.

[0034] In this embodiment, the second lower furnace section 122 is the main smelting place, and therefore, the inner wall of the second lower furnace section 122 is provided with a refractory material layer to protect the second lower furnace section 122. The first lower furnace section 121 can adopt a water-cooled structure or be provided with a refractory material on the inner wall thereof; and the eccentric zone cover 1231 can adopt a water-cooled structure or be provided with a refractory material on the inner wall thereof.

[0035] Optionally, the ear seat 1232 can be supported by corbels.

[0036] In one embodiment, as shown in Figures 1-3The bottom end of the upper furnace body 11 is formed with an annular skirt 1111 which is gradually widened from top to bottom, and the annular skirt 1111 is rested on the annular shoulder 123, and the bottom end of the upper furnace body 11 is designed as the skirt 1111, which can facilitate the tilting operation of the lower furnace body 12 and reduce the interference between the upper furnace body 11 and the lower furnace body 12.

[0037] As Figure 1 and Figure 3 An annular gap is designed between the inner wall of the upper furnace body 11 and the outer wall of the first lower furnace section 121, and the width of the annular gap satisfies that the upper furnace body 11 and the first lower furnace section 121 will not interfere with each other when the lower furnace body 12 is tilted, so that the smooth independent tilting of the lower furnace body 12 can be ensured.

[0038] In one embodiment, as Figures 1-3 The lower furnace body 12 is rotatably installed on the workshop foundation, and preferably the second lower furnace section 122 is rotatably installed on the workshop foundation; preferably, a rotary shaft 32 is arranged on the second lower furnace section 122, a support seat 35 is arranged on the workshop foundation, and the rotary shaft 32 is rotatably installed on the support seat 35, including but not limited to arranging a rotary sleeve 33 which is rotationally matched with the rotary shaft 32 on the support seat 35; the rotary sleeve 33 can be fixed by a gland 34 to prevent the lower furnace body 12 from moving axially along the rotary shaft 32 during tilting. The tilting mechanism includes but is not limited to using a tilting cylinder 31, the cylinder body of which is hinged on the workshop foundation, and the output end of which is hinged with the second lower furnace section 122.

[0039] When the smelting is completed and the tapping is needed, the ladle car carries the ladle to below the tapping hole 124 of the electric arc furnace, the electrode is lifted to the tapping position, and the upper furnace body 11 is lifted to a certain height, and the lifting stroke is preferably ensured that the upper furnace section 111 and the first lower furnace section 121 are not separated. Then the tilting cylinder 31 is actuated to tilt the lower furnace body 12 to the tapping side, at this time only the lower furnace body 12 is tilted, and the upper furnace body 11, the electrode and other electric furnace equipment do not need to be tilted. Since the upper furnace section 111 and the first lower furnace section 121 are not completely separated, there is a certain sealing effect, and there is less smoke during tapping, and in addition, the dust removal fan is always working to exhaust air, so smoke will not overflow from between the upper furnace section 111 and the first lower furnace section 121. After the tapping is completed, the lower furnace body 12 is quickly tilted back to the slag tapping side for sand filling operation, and the ladle car is driven out for refining, the upper furnace body 11 is lowered and seated on the annular shoulder 123, and then the electrode is lowered to re-melt the material.

[0040] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A separate rotating electric arc furnace, characterized in that, The upper furnace body and the lower furnace body are connected with a tilting mechanism; The lower furnace body is provided with an annular shoulder and comprises a first lower furnace section above the annular shoulder and a second lower furnace section below the annular shoulder, the upper furnace body covers the first lower furnace section and rests on the annular shoulder, and an annular gap is formed between the inner wall of the upper furnace body and the outer wall of the first lower furnace section to prevent the upper furnace body from interfering with the first lower furnace section when the lower furnace body tilts.

2. The split-arc furnace of claim 1, wherein: The bottom end of the upper furnace body is formed with an annular skirt that gradually expands from top to bottom and rests on the annular shoulder.

3. The split-arc furnace of claim 1, wherein: The upper furnace body comprises an upper furnace section and a furnace cover that is detachably arranged on the top of the upper furnace section.

4. The split-arc furnace of claim 3, wherein: The furnace cover is provided with a lifting structure.

5. The split-arc furnace of claim 3, wherein: The furnace cover comprises a first water-cooled frame and a plurality of water-cooled plates detachably mounted on the first water-cooled frame.

6. The split-arc furnace of claim 3, wherein: The upper furnace section comprises a second water-cooled frame and a plurality of water-cooled walls detachably mounted on the second water-cooled frame.

7. The split-arc furnace of claim 1, wherein: The second lower furnace section comprises a concentric zone and an eccentric zone, the concentric zone is coaxial with the first lower furnace section, and the eccentric zone is located on the side of the concentric zone away from the tilting mechanism and is provided with a tapping hole.

8. The split-arc furnace of claim 7, wherein: The annular shoulder comprises an eccentric zone cover that closes the top opening of the eccentric zone and an ear seat arranged on the wall of the concentric zone.

9. The split-arc furnace of claim 8, wherein: The eccentric zone cover is provided with a sand filling opening.

10. The split-arc furnace of claim 1, wherein: The inner wall of the second lower furnace section is provided with a refractory layer.

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