Short network system of submerged arc furnace and submerged arc furnace electrode access structure

Abstract

The utility model provides a short network system of a submerged arc furnace and an electrode access structure of the submerged arc furnace, and aims to solve the technical problem of high heat power consumption in the alternating current transportation process of the conventional submerged arc furnace. The short network system comprises a plurality of conductive tubes which are arranged in an array mode, a cavity penetrates through each conductive tube in the axial direction of the conductive tube, and a first silver-containing plating layer, a conductor layer and a second silver-containing plating layer are arranged in each conductive tube from outside to inside. The utility model further comprises a submerged arc furnace electrode access structure using the short network system, every two of the multiple conductive pipes form a conductive pipe set, and the head end of a first pipe of the conductive pipe set is installed on the transformer; the tail end of the second pipe is installed on the transformer and communicated with the head end of the first pipe. The copper tile is mounted on the electrode; the head end of the second pipe and the tail end of the first pipe are communicated and installed on the copper tile. Cooling water sequentially flows through the first pipe and the second pipe to form backflow. The resistance of the conductive tube is reduced through the plating layer, the conductivity of the short network system is improved, the short network system is connected to the electrode of the submerged arc furnace, and the thermal power consumption of the submerged arc furnace is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of short net of submerged arc furnace, in particular to a short net system of submerged arc furnace and an electrode access structure of submerged arc furnace. BACKGROUND

[0002] The smelting production of industrial silicon needs to be carried out in a submerged arc furnace with strong current. Usually, the current is generated by a transformer. In order to ensure the safety of smelting operation, the transformer is not placed near the submerged arc furnace. Therefore, the current generated by the transformer needs to be transmitted to the electrode of the submerged arc furnace through a short net system composed of multiple conductive copper pipes to maintain the high-temperature smelting of the submerged arc furnace.

[0003] Since the current transmitted by the short net is large, when a 33000kVA industrial silicon submerged arc furnace is used, the current of the connected short net can be as high as tens of thousands of amperes. According to Joule's law P=I 2 R, we can find that the heat dissipation generated by the circuit carried by the short net system is quite large. Considering the skin effect of alternating current used in the submerged arc furnace and combining the calculation and analysis of the skin effect current distribution density function, when the alternating current generated by the transformer is continuously transmitted to the submerged arc furnace, the heat dissipation is mainly concentrated in the conductive copper pipe. Although the conductive copper pipe currently used in the short net has reduced the heat dissipation generated in the process of transmitting current, the electric energy loss is still amazing in the face of tens of thousands of amperes of smelting current. CONTENT OF THE INVENTION

[0004] In order to solve the above problems, the present application provides a short net system of submerged arc furnace, which comprises:

[0005] A plurality of arrayed conductive pipes connected to the electric furnace for transmitting current; each conductive pipe has a cavity along its axial direction, and from outside to inside, it comprises a first silver-containing plating layer, a conductor layer and a second silver-containing plating layer.

[0006] Further, the conductive pipe of the short net system of the submerged arc furnace further comprises a flow guide layer for guiding the flow of cooling water in the cavity, and the flow guide layer is arranged in the second silver-containing plating layer.

[0007] Further, the flow guide layer is arranged on the inner wall of the second silver-containing plating layer, and the inner wall of the flow guide layer is provided with a flow guide groove penetrating the flow guide layer along the axial direction of the flow guide layer.

[0008] Further, the flow guide grooves are uniformly and spacedly arranged on the flow guide layer along the circumferential direction of the flow guide layer.

[0009] The application further provides a structure for connecting an electrode of an electric arc furnace, which comprises a transformer, an electrode, and a short net system of the electric arc furnace as described above, wherein the short net system of the electric arc furnace has a plurality of groups of conductive pipes, each group of conductive pipes comprises a first pipe, a second pipe and a copper tile, the first pipe has a first end installed on the transformer,

[0010] the second pipe has a second end installed on the transformer and communicating with the first end of the first pipe,

[0011] the copper tile is installed on the electrode, the second end of the second pipe communicates with the second end of the first pipe and is installed on the copper tile,

[0012] wherein cooling water flows through the first pipe and the second pipe in sequence to form a circulation for cooling the group of conductive pipes.

[0013] Further, the first pipe is provided with a water inlet and a water outlet at a position of the pipe wall close to the first end in sequence and in a spaced manner, the water inlet is arranged closer to the transformer than the water outlet; the cooling water is input from the water inlet of the first pipe and flows through the first pipe, the transformer, the second pipe and the copper tile in sequence and then returns to the water outlet of the first pipe for output.

[0014] Further, the first pipe and the second pipe are respectively installed by a plurality of bent pipes through hangers.

[0015] Further, the first pipe is provided with a first connecting position between two adjacent bent pipes, which is matched with a second connecting position between two adjacent bent pipes of the second pipe, so that each first connecting position is aligned with each second connecting position, and each first connecting position and the corresponding second connecting position are assembled at the corresponding same hanger.

[0016] Further, a plurality of copper tiles are installed on the outer wall of the electrode in a spaced manner along the circumference of the electrode through a mounting frame.

[0017] Further, the first end of the second pipe and the second end of the first pipe communicate in the copper tile.

[0018] Compared with the prior art, the structure for connecting an electrode of an electric arc furnace has the following beneficial effects:

[0019] The conductive copper pipe is plated to reduce the resistance of the conductive pipe itself; and the flow guide layer guides the cooling water to realize uniform heat exchange of the conductive pipe, reduce the influence of temperature on the resistance of the conductive pipe, and improve the conductivity of the short net system. The short net system is connected to the electrode of the electric arc furnace, effectively reduces the heat consumption in the current transmission process of the electric arc furnace, and also effectively reduces the use amount of the cooling water, improves the efficiency of the water cooling system, and reduces the power consumption of the water cooling system, so as to achieve the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 FIG. 1 is a cross-sectional view of a conductive pipe of a short net system of an electric arc furnace according to Embodiment 1 of the present application;

[0022] Figure 2 FIG. 2 is an array diagram of multiple conductive pipes of a short net system of an electric arc furnace according to Embodiment 1 of the present application;

[0023] Figure 3 FIG. 3 is a schematic diagram of an electrode access structure of an electric arc furnace according to Embodiment 2 of the present application;

[0024] Figure 4 FIG. 4 is a cross-sectional view of a bent pipe section with a water inlet of an electrode access structure of an electric arc furnace according to Embodiment 2 of the present application;

[0025] Figure 5 FIG. 5 is an assembly diagram of a first pipe and a second pipe in a copper tile of an electrode access structure of an electric arc furnace according to Embodiment 2 of the present application.

[0026] REFERENCE NUMERALS:

[0027] 1, conductive pipe; 10, first silver plating layer; 11, conductor layer; 11a, first pipe; 11b, second pipe; 110, water inlet; 111, water outlet; 112, cavity; 113, first pipe end; 114, second pipe head; 115, first connection; 116, second connection; 12, flow guide layer; 120, flow guide groove; 13, second silver plating layer; 14, U-shaped pipe;

[0028] 2, transformer;

[0029] 32, copper tile; 321, mounting bracket; 33, hanger;

[0030] 4, electrode. DETAILED DESCRIPTION

[0031] Hereinafter, only certain exemplary embodiments will be described simply. As can be recognized by those skilled in the art, the described embodiments can be modified in various different manners without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be essentially exemplary rather than limiting.

[0032] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "inner", "outer", "axial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of a specific example are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0036] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0037] Embodiment 1

[0038] The utility model embodiments provide a short net system of ore heating furnace, please refer to Figures 1-2 The short net system of ore heating furnace includes a plurality of array arrangement and is connected to the conductive pipe 1 of ore heating furnace, for the transmission of current to ore heating furnace. Every conductive pipe 1 is equipped with the cavity 112 that penetrates in it, and the cavity 112 is used for the flow of cooling water. The pipe wall of conductive pipe is from outside to inside first silver plating 10, conductor layer 11, second silver plating 13 and flow guide layer 12, preferably, the conductor layer 12 is copper conductor, and first silver plating 10, second silver plating 13 can be silver cyanide plating layer. Flow guide layer 12, for the flow guide of cooling water, is matched and arranged in the cavity 112 by penetrating the conductive pipe, and the inner wall of flow guide layer 12 is provided with flow guide groove 120 that penetrates flow guide layer 12 along its axial direction. The flow guide groove 120 can be evenly spaced and arranged in the flow guide layer 12 along the circumference of the flow guide layer. Preferably, the outer wall of flow guide layer 121 is provided with the inner wall of second silver plating 13.

[0039] The conductive pipe 1 plating layer reduces the resistance of the conductive pipe 1 itself, and the flow guide layer 12 realizes the uniform heat exchange of the conductive pipe 1 by guiding the cooling water, reduces the influence of temperature on the resistance of the conductive pipe, and is beneficial to improve the conductivity of the short net system.

[0040] Embodiment 2

[0041] The utility model embodiments further provide a kind of ore heating furnace electrode access structure, please refer to Figures 3-5 The ore heating furnace electrode access structure includes transformer 2, electrode 4 and uses the short net system involved in above-mentioned embodiment 1. Electrode 4 is installed in ore heating furnace, and short net system is connected between transformer 2 and electrode 4.

[0042] The short net system has a plurality of conductive pipes 1, and each two conductive pipes form a conductive pipe group. The plurality of conductive pipe groups are arrayed between the transformer 2 and the electrode 4. Preferably, the short net system has 10 conductive pipe groups. Each conductive pipe group includes a first pipe 11a, a second pipe 11b, and a copper tile 32. The first pipe first end and the second pipe end are respectively installed on the transformer 2, and the first pipe first end is communicated with the second pipe end. The first pipe end 113 is communicated with the second pipe first end 114 through the copper tile 32. Specifically, the first pipe end 113 and the second pipe first end 114 are respectively connected to the two ends of the U-shaped pipe 14 to realize the communication between the first pipe 11a and the second pipe 11b. The copper tile 32 is installed on the electrode 4. The plurality of conductive pipe groups have a plurality of copper tiles 32. The copper tiles 32 are installed on the outer wall of the electrode 4 along the circumference of the electrode 4 through the mounting bracket 321.

[0043] The first pipe 11a is provided with a water inlet 110 and a water outlet 111 at the pipe wall near the first end of the first pipe 11a in sequence and at intervals. The water inlet 110 is arranged closer to the transformer 2 than the water outlet 111, so that the cooling water entering the cavity 112 of the conductive pipe through the water inlet 110 can flow through the transformer 2, the second pipe 11b and the copper tile 32 in sequence and then flow back to the first pipe 11a, and finally flow out of the first pipe 11a through the water outlet 111. The first pipe 11a and the second pipe 11b are respectively installed by a plurality of bent pipes through the hangers 33. Preferably, the second connection 116 between two adjacent bent pipes of the second pipe 11b is matched with the first connection 115 between two adjacent bent pipes of the first pipe, so that each first connection 115 can be aligned with each second connection 116, so that each first connection 115 and its corresponding second connection 116 can be assembled at the corresponding same hanger 33.

[0044] The short net system in the above embodiment is connected to the electrode of the ore smelting furnace, which effectively reduces the heat consumption in the current transmission process of the ore smelting furnace, and also effectively reduces the use amount of cooling water, improves the efficiency of the water cooling system, reduces the power consumption of the water cooling system, and thus achieves the purpose of energy saving and consumption reduction.

Claims

1. A short network system for a submerged arc furnace, characterized in that: include: A plurality of conductive tubes arranged in an array and connected to the electric heating furnace are used for transmitting current; each conductive tube has a cavity running through it along its axial direction, which comprises a first silver-containing coating, a conductor layer and a second silver-containing coating from the outside to the inside.

2. The short-circuit system of the submerged arc furnace according to claim 1, characterized in that: The conductive tube of the short-grid system of the submerged arc furnace further includes a guide layer for guiding the cooling water in the cavity, and the guide layer is arranged in the second silver-containing plating layer.

3. The short-grid system of the submerged arc furnace according to claim 2, characterized in that: The outer wall of the guide layer is arranged to fit the inner wall of the second silver-containing plated layer, and the inner wall of the guide layer is provided with a guide groove penetrating the guide layer along the axial direction of the guide layer.

4. The short-grid system of the submerged arc furnace according to claim 3, characterized in that: The guide grooves are evenly spaced and arranged on the guide layer along the circumference of the guide layer.

5. A submerged arc furnace electrode access structure, characterized in that: include: A transformer, an electrode, and a short-circuit system for a submerged arc furnace according to any one of claims 1 to 4, wherein the short-circuit system for the submerged arc furnace comprises a plurality of conductive tubes, two of each forming a conductive tube group, an array of the plurality of conductive tube groups being arranged between the transformer and the electrode, each conductive tube group comprising a first tube, a second tube, and a copper tile; The first tube, the first end of which is mounted on the transformer, The second tube has a terminal end mounted on the transformer and communicated with a first end of the first tube; The copper shoe is mounted on the electrode; the head end of the second tube is connected to the tail end of the first tube and both are mounted on the copper shoe; The cooling water flows through the first tube and the second tube in sequence to form a reflux, which is used for cooling the conductive tube group.

6. The electrode access structure of a submerged arc furnace according to claim 5, characterized in that: The first tube is provided with a water inlet and a water outlet at intervals in sequence on the tube wall near its head end. The water inlet is arranged on the tube wall of the first tube closer to the transformer than the water outlet. The cooling water is input through the water inlet of the first tube, and flows through the first tube, the transformer, the second tube, and the copper tile in sequence, and then flows back to the water outlet of the first tube for output.

7. The electrode access structure of a submerged arc furnace according to claim 5, characterized in that: The first tube and the second tube are respectively formed by installing a plurality of bent tubes through hangers.

8. The electrode access structure of a submerged arc furnace according to claim 7, characterized in that: The first connection of the two adjacent bent tubes of the first tube is matched with the second connection of the two adjacent bent tubes of the second tube, so that each first connection can be aligned with each second connection, so that each first connection and its corresponding second connection can be assembled at the same corresponding hanger.

9. The electrode access structure of a submerged arc furnace according to claim 5, characterized in that: A plurality of copper bushes are installed on the outer wall of the electrode at intervals along the circumference of the electrode through a mounting frame.

10. The electrode access structure of a submerged arc furnace according to claim 5, characterized in that: The first end of the second tube and the tail end of the first tube are connected in the copper shoe.

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