Novel copper-steel composite pressure ring for submerged arc furnace

Abstract

A novel copper-steel composite pressure ring for a submerged arc furnace comprises a plurality of pressure ring units, the pressure ring units are sequentially connected end to end to form an annular structure, each pressure ring unit comprises a pressure ring unit body, a cooling water channel is arranged in each pressure ring unit body, and a water inlet and a water outlet are formed in the two ends of each cooling water channel respectively. The pressure ring unit is characterized in that the pressure ring unit body comprises an outer copper plate and a copper bottom boss, the copper bottom boss is arranged on the inner side of the lower end of the outer copper plate, and the outer copper plate and the copper bottom boss are made of copper into a whole; an inner side steel plate is compounded on the inner side surface of the outer side copper plate and is tightly combined with the outer side copper plate; and a bottom steel plate is compounded on the upper surface of the copper bottom boss and is tightly combined with the copper bottom boss. The novel copper-steel composite pressure ring for the submerged arc furnace not only has strong cooling performance, but also has higher overall mechanical strength and strong deformation resistance, and is beneficial to prolonging the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ore furnace, concretely relates to a novel copper steel composite pressure ring for ore furnace. BACKGROUND

[0002] The pressure ring is an important special water cooling element of the ore furnace, and is usually composed of a plurality of (for example, 6-12) pressure ring units to form an annular pressure ring, which is an annular cooling device for protecting the electrode holding system. The pressure ring is located outside the copper tile, and the bellows expansion joint installed on the inner side of the pressure ring can apply a jacking force to push the copper tile to tightly hold the electrode, so that the copper tile and the electrode are in good contact, thereby making the current uniformly pass through the electrode into the furnace through the copper tile, and ensuring that the ore furnace can work stably and continuously.

[0003] The working environment of the pressure ring is very harsh, and the high-temperature harmful flue gas generated during smelting produces a high thermal load on the cooling equipment deep into the furnace, especially the pressure ring at the bottom of the ore furnace, which is closer to the charge surface and has a higher environmental temperature. The pressure ring not only has to withstand high temperature and heat radiation in the furnace, but also has to withstand the heat generated by its own conduction, so the pressure ring itself requires strong cooling capacity; at the same time, the pressure ring is subjected to the counter-jacking force of the bellows expansion joint, which is prone to deformation and damage, so the pressure ring requires high anti-deformation capacity.

[0004] The existing copper pressure ring, such as the prior patent "copper pressure ring for ore furnace" of the applicant with the authorization announcement number CN208523018U, uses copper or copper alloy with good heat conductivity as the material of the copper pressure ring unit body, and sets a cooling water channel inside, which can meet the requirement of cooling capacity, however, the copper or copper alloy material of the copper pressure ring unit body has low overall mechanical strength and poor anti-deformation capacity. SUMMARY

[0005] The utility model solves the technical problem of providing a novel copper steel composite pressure ring for ore furnace, which has strong cooling performance, high overall mechanical strength, and strong anti-deformation capacity, and is beneficial to prolong the service life. The technical scheme adopted is as follows:

[0006] The utility model provides a novel copper-steel composite pressure ring for an electric arc furnace, comprising a plurality of pressure ring units connected end to end to form a ring structure, each pressure ring unit comprising a pressure ring unit body provided with a cooling water channel, and an inlet and an outlet at opposite ends of the cooling water channel, characterized in that the pressure ring unit body comprises an outer copper plate and a copper bottom boss, the copper bottom boss is arranged on the inner side of the lower end of the outer copper plate, and the outer copper plate and the copper bottom boss are made of copper in one piece; an inner steel plate is arranged on the inner side of the outer copper plate and tightly combined with the outer copper plate; a bottom steel plate is arranged on the upper surface of the copper bottom boss and tightly combined with the copper bottom boss.

[0007] In the novel copper-steel composite pressure ring for an electric arc furnace, the outer side and the bottom of the pressure ring unit are in a high-temperature environment and have a poor working environment, so the outer copper plate and the copper bottom boss are arranged at these positions, the excellent heat conduction of copper is used to quickly transfer heat to the cooling water flowing in the cooling water channel, and the cooling water is used to remove the heat, so that the pressure ring has strong cooling performance; in addition, the inner steel plate and the bottom steel plate are arranged on the inner side and the upper surface of the bottom of the pressure ring unit respectively, the excellent mechanical strength of steel is used to make the pressure ring unit have high overall mechanical strength and enhance the deformation resistance. Therefore, the novel copper-steel composite pressure ring for an electric arc furnace has strong cooling performance and high overall mechanical strength and strong deformation resistance, so as to prolong the service life. Compared with the existing copper pressure ring, the utility model can improve the overall mechanical strength and the deformation resistance, reduce the consumption of copper, and effectively reduce the material cost.

[0008] In the preferred embodiment, the inner steel plate and the bottom steel plate are made of steel in one piece, and the lower edge of the inner steel plate is integrally connected to the outer edge of the bottom steel plate.

[0009] The inner steel plate and the outer copper plate can be combined by welding, mechanical connection or metallurgical bonding.

[0010] The bottom steel plate and the copper bottom boss can be combined by welding, mechanical connection or metallurgical bonding.

[0011] In the preferred embodiment, the inner side of the outer copper plate is provided with an inner steel plate accommodating groove capable of accommodating the inner steel plate, and the inner steel plate is arranged in the inner steel plate accommodating groove. More preferably, the edge of the inner steel plate is welded to the groove wall of the inner steel plate accommodating groove.

[0012] In the preferred embodiment, the upper surface of the copper bottom boss is provided with a bottom steel plate accommodating groove capable of accommodating the bottom steel plate, and the bottom steel plate is arranged in the bottom steel plate accommodating groove. More preferably, the edge of the bottom steel plate is welded to the groove wall of the bottom steel plate accommodating groove.

[0013] In a preferred embodiment, the cooling water channel is arranged in the outer copper plate and the inner copper bottom boss.

[0014] In another preferred embodiment, the cooling water channel is arranged in the copper-steel joint of the pressure ring unit body; the copper-steel joint includes the joint of the inner steel plate and the outer copper plate, and the joint of the bottom steel plate and the copper bottom boss. Arranging the cooling water channel in the copper-steel joint of the pressure ring unit body can further thin the copper material and increase the steel material, thereby further reducing the amount of copper material used and reducing the material cost. The cooling water channel is arranged in the copper-steel joint, which can be processed in two ways: one is to drill holes after the copper plate and the steel plate are combined; the other is to process part of the water channel on the copper plate and the steel plate respectively (part of the water channel is a groove processed on the corresponding surface of the copper plate and the steel plate), and then combine them in position.

[0015] The cross-sectional shape of the cooling water channel can be a single circular hole, a double circular hole, or a composite hole type composed of multiple intersecting circular holes. Compared with a single circular hole, a double circular hole or a composite hole type has a larger heat exchange area and a better cooling effect on the basis of ensuring the same cross-sectional area.

[0016] In a preferred embodiment, the cooling water channel is connected by multiple water channel segments, and the water channel segments are formed in the pressure ring unit body by drilling. Generally, the pressure ring unit body is arc-shaped, and the transverse water channel segments are also arc-shaped; the transverse linear water channel segments can be formed on the copper plate (i.e., the outer copper plate and the copper bottom boss) or the copper-steel composite plate by drilling, and then the linear water channel segments are formed into arc-shaped transverse water channel segments when the copper plate or the copper-steel composite plate is bent into an arc shape.

[0017] The copper material used to make the outer copper plate and the copper bottom boss can be pure copper or a copper alloy, wherein the pure copper is preferably oxygen-free copper, and the copper alloy can be chromium-zirconium copper alloy or chromium-copper alloy. In a preferred embodiment, the outer copper plate and the copper bottom boss are made of forged copper plate or rolled copper plate. The forged copper plate or the rolled copper plate is machined to have the outer copper plate, the copper bottom boss, the inner steel plate container groove, and the bottom steel plate container groove.

[0018] The steel material used to make the inner steel plate and the bottom steel plate can be carbon steel, alloy steel, or stainless steel.

[0019] One or more cooling water channels can be arranged in one pressure ring unit body, and each cooling water channel has a water inlet and a water outlet. The cooling water channels are independent of each other and are respectively supplied with cooling water to cool the pressure ring unit body. A water inlet pipe can be installed at the water inlet, and a water outlet pipe can be installed at the water outlet.

[0020] In a preferred embodiment, the water inlet and the water outlet are opened on the inner side surface of the inner steel plate.

[0021] In the preferred scheme, the new copper-steel composite pressure ring for the electric arc furnace comprises 6-12 pressure ring units, and each pressure ring unit has the same specification.

[0022] In the new copper-steel composite pressure ring for the electric arc furnace, the outer copper plate and the copper bottom boss have excellent heat conduction performance, can rapidly transfer heat to the cooling water in the cooling water channel, and take away the heat by the cooling water, have strong cooling performance, and realize rapid cooling of each pressure ring unit; on this basis, the inner steel plate and the bottom steel plate have excellent mechanical strength, can improve the mechanical strength of the pressure ring unit and the entire pressure ring, and enhance the deformation resistance of the pressure ring. Therefore, the copper-steel composite pressure ring can maximize the advantages of copper and steel, meet the strong cooling performance, improve the overall mechanical strength of the product, enhance the deformation resistance, and is beneficial to prolong the service life. In addition, the copper consumption of the pressure ring unit body can be reduced, and the material cost can be effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view (perspective view) of the pressure ring unit in the preferred embodiment 1 of the utility model;

[0024] Figure 2 is Figure 1 a top view of the pressure ring unit;

[0025] Figure 3 is Figure 2 a A-A sectional view of the pressure ring unit;

[0026] Figure 4 is a structural schematic view (perspective view) of the pressure ring unit in the preferred embodiment 2 of the utility model;

[0027] Figure 5 is Figure 4 a top view of the pressure ring unit;

[0028] Figure 6 is Figure 5 a B-B sectional view of the pressure ring unit;

[0029] Figure 7 is a structural schematic view (perspective view) of the pressure ring unit in the preferred embodiment 3 of the utility model;

[0030] Figure 8 is Figure 7 a top view of the pressure ring unit;

[0031] Figure 9 is Figure 8 a C-C sectional view of the pressure ring unit. DETAILED DESCRIPTION

[0032] Embodiment 1, as Figures 1-3As shown, the new copper-steel composite pressure ring for the electric arc furnace includes a plurality of (e.g., 6, 8, 10, or 12, etc.) pressure ring units 1, which are sequentially connected end to end to form a ring structure. The pressure ring unit 1 includes a pressure ring unit body 11, which is provided with a cooling water passage 12, and the cooling water passage 12 is respectively provided with an inlet 13 and an outlet 14 at both ends. The pressure ring unit body 11 includes an outer copper plate 111 and a copper bottom boss 112, and the copper bottom boss 112 is arranged on the inner side of the lower end of the outer copper plate 111. The outer copper plate 111 and the copper bottom boss 112 are made of copper material in one piece. The inner side of the outer copper plate 111 is compounded with an inner steel plate 113, and the inner steel plate 113 is tightly combined with the outer copper plate 111. The upper surface of the copper bottom boss 112 is compounded with a bottom steel plate 114, and the bottom steel plate 114 is tightly combined with the copper bottom boss 112.

[0033] In this embodiment, the inner steel plate 113 and the bottom steel plate 114 are made of steel material in one piece, and the lower edge of the inner steel plate 113 is integrally connected with the outer edge of the bottom steel plate 114.

[0034] The composite mode between the inner steel plate 113 and the outer copper plate 111 can adopt various modes such as welding, mechanical coupling, or metallurgical combination. The composite mode between the bottom steel plate 114 and the copper bottom boss 112 can adopt various modes such as welding, mechanical coupling, or metallurgical combination.

[0035] In this embodiment, the cooling water passage 12 is arranged inside the outer copper plate 111 and the copper bottom boss 112. The inlet 13 and the outlet 14 are opened on the inner side surface of the inner steel plate 113.

[0036] In this embodiment, the cooling water passage 12 is connected by a plurality of water channel segments, and the water channel segments are formed in the outer copper plate 111 and the copper bottom boss 112 by drilling. The cross-sectional shape of the cooling water passage 12 can be a single circular hole, a double circular hole, or a composite hole type composed of a plurality of intersecting circular holes.

[0037] The pressure ring unit body 11 is arc-shaped, and the transverse water channel segments are also arc-shaped. The straight-line transverse water channel segments can be formed on the copper plate (i.e., the outer copper plate 111 and the copper bottom boss 112) by drilling first, and then the straight-line transverse water channel segments are formed into arc-shaped transverse water channel segments when the copper plate is bent into an arc shape.

[0038] The outer copper plate 111 and the copper bottom boss 112 are made of forged copper plate or rolled copper plate. The outer copper plate and the copper bottom boss are machined by machining the shape, and the water channel segments are formed by drilling, and then bent into an arc shape.

[0039] The steel used to make the inner steel plate 113 and the bottom steel plate 114 is stainless steel (carbon steel or alloy steel may also be used).

[0040] Cooling water is supplied from the inlet 13 to the cooling water channel 12. The cooling water carries away the heat of the pressure ring unit body 11, cools the pressure ring unit body 11, and then flows out from the outlet 14.

[0041] Example 2, as Figures 4-6 As shown, the difference between this embodiment and embodiment 1 is that the cooling water channel 12 is provided in the copper-steel joint 15 of the pressure ring unit body 11; the copper-steel joint 15 includes a joint 151 between the inner steel plate 113 and the outer copper plate 111, and a joint 152 between the bottom steel plate 114 and the copper bottom boss 112.

[0042] The cooling water channel 12 is located at the copper-steel joint 15. There are two processing methods: one is to drill holes after the copper plate and steel plate are joined; the other is to process some water channels on the copper plate and steel plate respectively (some water channels are grooves processed on the corresponding surfaces of the copper plate and steel plate), and then align and join them.

[0043] The remaining structure of this embodiment is the same as that in Embodiment 1.

[0044] Example 3, as Figures 7-9 As shown, the difference between this embodiment and embodiment 1 is that: the inner side of the outer copper plate 111 is provided with an inner steel plate receiving groove 16 that can accommodate the inner steel plate 113, the inner steel plate 113 is located in the inner steel plate receiving groove 16, and the edge of the inner steel plate 113 is welded to the groove wall 161 of the inner steel plate receiving groove 16; the upper surface of the copper bottom boss 112 is provided with a bottom steel plate receiving groove 17 that can accommodate the bottom steel plate, the bottom steel plate 114 is located in the bottom steel plate receiving groove 17, and the edge of the bottom steel plate 114 is welded to the groove wall 171 of the bottom steel plate receiving groove 17.

[0045] The remaining structure of this embodiment is the same as that in Embodiment 1.

Claims

1. A novel copper-steel composite pressure ring for a submerged arc furnace, comprising a plurality of pressure ring units connected end to end in sequence to form a ring structure, wherein each pressure ring unit comprises a pressure ring unit body, and a cooling water channel is arranged in the pressure ring unit body, and a water inlet and a water outlet are arranged at both ends of the cooling water channel, characterized in that: The pressure ring unit body comprises an outer copper plate and a copper bottom boss, the copper bottom boss is arranged at the inner side of the lower end of the outer copper plate, the outer copper plate and the copper bottom boss are made of copper material in one piece; the inner side of the outer copper plate is compounded with an inner steel plate, the inner steel plate is tightly combined with the outer copper plate; the upper surface of the copper bottom boss is compounded with a bottom steel plate, the bottom steel plate is tightly combined with the copper bottom boss. ​ 2. The novel copper-steel composite pressure ring for the submerged arc furnace according to claim 1, characterized in that: The inner steel plate and the bottom steel plate are made of steel material in one piece, the lower edge of the inner steel plate is integrally connected with the outer edge of the bottom steel plate.

3. The novel copper-steel composite pressure ring for the electric arc furnace according to claim 1 or 2, characterized in that: The inner side of the outer copper plate is provided with an inner steel plate accommodating groove capable of accommodating the inner steel plate, and the inner steel plate is arranged in the inner steel plate accommodating groove.

4. The novel copper-steel composite pressure ring for the electric arc furnace according to claim 1 or 2, characterized in that: The upper surface of the copper bottom boss is provided with a bottom steel plate accommodating groove capable of accommodating the bottom steel plate, and the bottom steel plate is arranged in the bottom steel plate accommodating groove.

5. The novel copper-steel composite pressure ring for the electric arc furnace according to claim 1 or 2, characterized in that: The cooling water channel is arranged inside the outer copper plate and the copper bottom boss.

6. The novel copper-steel composite pressure ring for the electric arc furnace according to claim 1 or 2, characterized in that: The cooling water channel is arranged at the copper-steel combined part of the pressure ring unit body; the copper-steel combined part comprises the combined part of the inner steel plate and the outer copper plate, and the combined part of the bottom steel plate and the copper bottom boss.

7. The novel copper-steel composite pressure ring for the submerged arc furnace according to claim 1 or 2, characterized in that: The outer copper plate and the copper bottom boss are made of forged copper plate or rolled copper plate.

8. The novel copper-steel composite pressure ring for the electric arc furnace according to claim 1 or 2, characterized in that: The steel material used for making the inner steel plate and the bottom steel plate is carbon steel, alloy steel or stainless steel.

9. The novel copper-steel composite pressure ring for the submerged arc furnace according to claim 1 or 2, characterized in that: The water inlet and the water outlet are opened on the inner side of the inner steel plate.

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