Industrial silicon production device of direct-current submerged arc furnace

Abstract

The utility model relates to the technical field of smelting equipment, in particular to a direct current submerged arc furnace industrial silicon production device which comprises a furnace body. The rotating equipment is arranged at the bottom of the furnace body to drive the furnace body to rotate; the positive electrode and the negative electrode are respectively arranged in the furnace body; and the power supply equipment is electrically connected with the electrodes. Direct-current power supply of the submerged arc furnace is achieved through the rectifier transformer and the rectifier cabinet, compared with alternating-current power supply, direct-current power supply has the advantages of being small in inductive reactance loss, high in power factor, free of skin effect, stable in direct-current arc, low in energy consumption and the like, the electrodes do not affect one another, the insertion depths of the electrodes are kept consistent, and the heating efficiency is improved. In addition, the furnace body is arranged to be of a rotatable structure, and the efficiency and the product quality in the industrial silicon smelting process are jointly improved through the stability of direct-current power supply and uniform heat distribution and material transmission brought by rotation of the furnace body.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting equipment, in particular to a direct current ore-fired furnace industrial silicon production device. Background Art

[0002] At present, most of the domestic industrial silicon ore-fired furnaces with a capacity of 33000KVA and above use AC power supply. AC power supply means that three single-phase electric furnace transformers are compensated by low-voltage capacitors to improve the power factor, and then the electric energy is transmitted to three electrodes through the short-circuit system. The three electrodes then transmit the electric energy to the furnace chamber of the ore-fired furnace, thereby heating the charge in the furnace chamber to produce physical and chemical reactions and produce industrial silicon.

[0003] Although AC power supply has advantages in terms of technology maturity and cost control, it has low power factor, large skin effect, unstable arc and high energy consumption, which leads to relatively low production efficiency and poor product quality of industrial silicon. In addition, the three electrodes in the furnace will affect each other, and it is difficult to keep the insertion depth of the three electrodes consistent, which leads to uneven temperature distribution in the furnace, reduced heating efficiency and low energy utilization efficiency. Utility Model Content

[0004] The utility model aims to provide a direct current ore-arc furnace industrial silicon production device to solve the problems raised in the above background technology.

[0005] The technical solution adopted by the utility model is:

[0006] A DC ore-fired furnace industrial silicon production device, comprising:

[0007] Furnace body;

[0008] A rotating device, arranged at the bottom of the furnace body, to drive the furnace body to rotate;

[0009] Electrodes, divided into positive electrodes and negative electrodes, are respectively arranged in the furnace body;

[0010] A power supply device is electrically connected to the electrodes.

[0011] Preferably, the power supply equipment includes a rectifier transformer, a rectifier cabinet, a conductive copper bus and a short circuit network;

[0012] in,

[0013] The primary side of the rectifier transformer inputs alternating current, the secondary side of the rectifier transformer is electrically connected to the rectifier cabinet through the conductive copper busbar, the rectifier cabinet is connected to positive and negative pole interfaces, and the positive and negative pole interfaces of the rectifier cabinet are electrically connected to the positive electrode and negative electrode of the electrode respectively through the short circuit network.

[0014] Preferably, one rectifier transformer is equipped with one set of rectifier cabinet.

[0015] Preferably, each ore-fired furnace is equipped with at least one set of power supply equipment. When equipped with two or more sets of power supply equipment, the corresponding positive electrodes and negative electrodes are alternately arranged in the furnace body.

[0016] Preferably, the rotating device comprises:

[0017] A rotating track, on which a rotating mechanism is arranged;

[0018] A rotating tray, arranged on the rotating mechanism;

[0019] A rotation drive system, drivingly connected to the rotation mechanism;

[0020] A central column is arranged on the central axis of the rotating track and the rotating mechanism.

[0021] Preferably, the furnace body comprises a furnace shell and a furnace lining;

[0022] The furnace lining is located inside the furnace shell, and the furnace shell is seated on a part of the rotating device.

[0023] Preferably, at least two furnace outlets are formed through the side wall of the furnace body.

[0024] Preferably, it further comprises a concrete foundation, and a part of the rotating equipment is arranged on the concrete foundation.

[0025] Preferably, the concrete foundation is divided into a lower circle layer and an upper circle layer from bottom to top, and a part of the rotating equipment is arranged on the upper circle layer.

[0026] Preferably, the upper circle layers are, from the inside to the outside, an inner circle layer, a middle circle layer and an outer circle layer, the central column is arranged on the inner circle layer, and the rotating track is arranged on the middle circle layer.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] In the utility model, the DC power supply of the ore-fired furnace is realized through a rectifier transformer and a rectifier cabinet. Compared with AC power supply, DC power supply has the advantages of small inductive reactance loss, high power factor, no skin effect, less electrode consumption, stable DC arc and low energy consumption. In the utility model, the electrodes do not affect each other, and the insertion depth of the electrodes is kept consistent, which improves the heating efficiency and reduces energy loss. Furthermore, in the utility model, the furnace body is set as a rotatable structure, and the stability of DC power supply and the uniform heat distribution and material transfer brought by the rotation of the furnace body jointly improve the efficiency and product quality of the industrial silicon smelting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the furnace body, rotating equipment and concrete foundation structure of this application;

[0031] Figure 2 This is a schematic diagram of the power supply equipment and electrode structure of this application.

[0032] Reference numerals:

[0033] 11. Lower circle layer; 12. Upper circle layer; 121. Inner circle layer; 122. Middle circle layer; 123. Outer circle layer; 13. Center support;

[0034] 21. Rotating track; 22. Rotating mechanism; 23. Rotating drive system; 24. Rotating tray; 25. Center column;

[0035] 3. Furnace body; 31. Furnace shell; 32. Furnace lining; 33. Furnace outlet;

[0036] 41. Rectifier transformer; 42. Rectifier cabinet; 43. Conductive copper busbar; 44. Short network;

[0037] 5. Electrode. DETAILED DESCRIPTION

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0041] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0042] like Figure 1-Figure 2 As shown, an embodiment of the utility model provides a DC ore-fired furnace industrial silicon production device, including: a concrete foundation, a rotating device, a furnace body 3, a power supply device and an electrode 5 and other parts.

[0043] Among them, the concrete foundation serves as a supporting component, and a rotating device is arranged on the top thereof, and a furnace body 3 is arranged on the rotating device. The furnace body 3 is used to accommodate the charge, and an electrode 5 is arranged in the furnace of the furnace body 3. The power supply device is electrically connected to the electrode 5, and the power supply device provides power to the electrode 5. When in use, the power supply device first transmits direct current to the electrode 5, and the electrode 5 uses a direct current arc to heat the charge, and then the furnace body 3 is driven by the rotating device to rotate. The stability of the DC power supply and the uniform heat distribution and material transfer brought about by the rotation of the furnace body 3 jointly improve the efficiency and product quality of the industrial silicon smelting process.

[0044] Specifically, the concrete foundation is cylindrical, and is divided into a lower circle layer 11 and an upper circle layer 12 from bottom to top. The upper circle layer 12 is divided into three layers from inside to outside, namely an inner circle layer 121, a middle circle layer 122 and an outer circle layer 123, wherein the heights of the inner circle layer 121, the middle circle layer 122 and the outer circle layer 123 increase successively, and the thicknesses decrease successively. A central support 13 is arranged on the central axis of the inner circle layer 121, and the sum of the heights of the central support 13 and the inner circle layer 121 is substantially consistent with the height of the middle circle layer 122.

[0045] The rotating device includes: a rotating track 21, a rotating mechanism 22, a rotating drive system 23, a rotating tray 24 and a central column 25. The rotating track 21 is arranged on the top of the circumference of the middle ring layer 122, and a rotating mechanism 22 is arranged on the rotating track 21. The rotating mechanism 22 can rotate along the path defined by the rotating track 21. A rotating tray 24 is arranged on the rotating mechanism 22. The rotating mechanism 22 drives the rotating tray 24 to rotate along the path defined by the rotating track 21, and the rotating tray 24 supports the furnace body 3. The rotating drive system 23 drives the rotating mechanism 22 to rotate. In order to prevent the rotating mechanism 22 and the rotating tray 24 from deviating during the rotation process, a central column 25 is arranged on the central axis of the rotating track 21 and the rotating mechanism 22. The central column 25 is fixedly connected to the central bracket 13, and the central column 25 is deeply inserted into the rotating mechanism 22, and its top does not contact the bottom of the rotating tray 24.

[0046] The furnace body 3 includes: a furnace shell 31 and a furnace lining 32. The furnace shell 31 is seated on the rotating tray 24, and the furnace lining 32 is built in the furnace shell 31. The furnace chamber formed after the furnace lining 32 is built is the place where the charge in the ore arc furnace reacts. A furnace outlet 33 is opened through the side wall of the furnace body 3. In this embodiment, preferably, there are five furnace outlets 33, which are respectively opened on the side wall of the furnace body 3. The product or slag after the reaction in the furnace chamber is discharged through the furnace outlet 33. There is a furnace eye in the furnace outlet 33. During normal smelting, the furnace eye is blocked with mud balls, and the furnace eye is drilled with a drill rod of an eye-opening machine when the furnace is discharged.

[0047] During specific operation, the rotary drive system 23 is started, and the rotary drive system 23 drives the rotary mechanism 22 to rotate along the path of the rotary track 21, and the rotary mechanism 22 drives the rotary tray 24, and the rotary tray 24 drives the furnace body 3 to rotate along the path of the rotary track 21. The rotating furnace body 3 can ensure that the charge is heated evenly, avoiding the "hot spot" and "cold spot" phenomenon in the traditional static furnace, thereby improving the heat treatment quality of the charge in the furnace.

[0048] The power supply equipment includes a rectifier transformer 41, a rectifier cabinet 42, a conductive copper busbar 43 and a short circuit network 44. The primary side of the rectifier transformer 41 inputs alternating current, which is adjusted to the voltage required for smelting by the rectifier transformer 41. The secondary side of the rectifier transformer 41 is electrically connected to the rectifier cabinet 42 through the conductive copper busbar 43. The rectifier cabinet 42 rectifies the alternating current into direct current. The rectifier cabinet 42 outputs two sets of positive and negative interfaces, which are connected through the short circuit network 44. One rectifier transformer 41 is equipped with a set of rectifier cabinets 42. The two sets of positive and negative interfaces output by the rectifier cabinets 42 are connected through the short circuit network 44 to form a set of power supply equipment, and each set of power supply equipment is independently powered.

[0049] The electrode 5 includes a positive electrode and a negative electrode. The positive electrode is electrically connected to the positive electrode interface of the rectifier cabinet 42 through a short net 44, and the negative electrode is electrically connected to the negative electrode interface of the rectifier cabinet 42 through a short net 44. The ends of the positive electrode and the negative electrode are placed in the furnace of the submerged arc furnace to transmit direct current power to the furnace of the submerged arc furnace, heat the furnace charge in the furnace to produce a physical and chemical reaction, and produce industrial silicon.

[0050] Each submerged arc furnace may be equipped with one or more sets of power supply equipment. When equipped with two or more sets of power supply equipment, the positive electrode and the negative electrode electrodes 5 are arranged alternately in the furnace. Figure 2 As shown, the power supply equipment consists of two sets that independently supply power to the electrodes.

[0051] In this embodiment, the alternating current is first adjusted to the voltage required for smelting through the rectifier transformer 41, and then the alternating current is rectified into direct current through the rectifier cabinet 42. The direct current is connected to the positive and negative electrodes 5 through the short network 44. The ends of the positive and negative electrodes are placed in the furnace of the ore-smelting furnace for submerged arc smelting. The charge is heated by the direct current arc to produce a physical and chemical reaction, and industrial silicon is produced. Qualified industrial silicon or slag flows out through the furnace outlet 33. Finally, the furnace body 3 is rotated by a rotating device. The rotating furnace body 3 can ensure that the charge is heated evenly, avoiding the "hot spots" and "cold spots" in traditional static furnaces, and improving the heat treatment quality of the charge in the furnace. The stability of the direct current power supply and the uniform heat distribution and material transfer brought about by the rotation of the furnace body 3 jointly improve the efficiency and product quality of the industrial silicon smelting process.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A DC ore-fired furnace industrial silicon production device, characterized in that: include: Furnace body; A rotating device, arranged at the bottom of the furnace body, to drive the furnace body to rotate; Electrodes, divided into positive electrodes and negative electrodes, are respectively arranged in the furnace body; A power supply device is electrically connected to the electrodes.

2. The DC ore-fired furnace industrial silicon production device according to claim 1, characterized in that: The power supply equipment includes a rectifier transformer, a rectifier cabinet, a conductive copper bus and a short circuit network; in, The primary side of the rectifier transformer inputs alternating current, the secondary side of the rectifier transformer is electrically connected to the rectifier cabinet through the conductive copper busbar, the rectifier cabinet is connected to positive and negative pole interfaces, and the positive and negative pole interfaces of the rectifier cabinet are electrically connected to the positive electrode and negative electrode of the electrode respectively through the short circuit network.

3. The DC ore-fired furnace industrial silicon production device according to claim 2, characterized in that: One rectifier transformer is equipped with one set of rectifier cabinet.

4. The DC ore-fired furnace industrial silicon production device according to claim 1, characterized in that: Each ore-fired furnace is equipped with at least one set of power supply equipment. When equipped with two or more sets of power supply equipment, the corresponding positive electrodes and negative electrodes are arranged alternately in the furnace body.

5. The DC ore-fired furnace industrial silicon production device according to claim 1, characterized in that: The rotating device comprises: A rotating track, on which a rotating mechanism is arranged; A rotating tray, arranged on the rotating mechanism; A rotation drive system, drivingly connected to the rotation mechanism; A central column is arranged on the central axis of the rotating track and the rotating mechanism.

6. The DC ore-fired furnace industrial silicon production device according to claim 1, characterized in that: The furnace body comprises a furnace shell and a furnace lining; The furnace lining is located inside the furnace shell, and the furnace shell is seated on a part of the rotating device.

7. The DC ore-fired furnace industrial silicon production device according to claim 1, characterized in that: At least two furnace outlets are formed through the side wall of the furnace body.

8. The DC ore-fired furnace industrial silicon production device according to claim 5, characterized in that: Also included is a concrete foundation on which a portion of the rotating device is disposed.

9. The DC ore-fired furnace industrial silicon production device according to claim 8, characterized in that: The concrete foundation is divided into a lower circle layer and an upper circle layer from bottom to top, and a part of the rotating device is arranged on the upper circle layer.

10. The DC ore-fired furnace industrial silicon production device according to claim 9, characterized in that: The upper ring layer is composed of an inner ring layer, a middle ring layer and an outer ring layer from the inside to the outside, the central column is arranged on the inner ring layer, and the rotating track is arranged on the middle ring layer.

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