Variable polarity power supply device for four-electrode direct-current submerged arc furnace

Abstract

The utility model discloses a polarity-variable power supply device for a four-electrode direct-current submerged arc furnace, which relates to the technical field of submerged arc furnace power supply and comprises an electrode I, an electrode II, an electrode III and an electrode IV, the working polarity between the first electrode and the second electrode is adjusted through a polarity adjustable device, the working polarity between the third electrode and the fourth electrode is adjusted through a polarity adjustable device, and a first rectifying device and a second rectifying device are arranged on the two sides of an electrode set formed by the first electrode, the second electrode, the third electrode and the fourth electrode respectively. And water coolers are arranged on the first rectifying device and the second rectifying device. The first rectifying device and the second rectifying device are matched with each other, the polarity adjustable device is utilized, the anode effect in the production process of the direct-current electric furnace is obviously improved, electrode roasting is facilitated, production is guaranteed, the furnace does not need to be shut down during polarity switching, the switching time is short, and the polarity adjustable device is matched with the water cooler, so that the working temperature is low, the loss is small, and more energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ore heating furnace power supply, especially four electrode direct current ore heating furnace variable polarity power supply device. BACKGROUND

[0002] Ore heating furnace is also called arc furnace or resistance furnace, and is mainly used for reducing smelting ore, carbonaceous reducing agent and solvent and other raw materials. The ore heating furnace is provided with carbonaceous or magnesia refractory material as the furnace lining, uses self-grown electrode, and the electrode is inserted into the furnace charge for arc buried operation. The energy of the electric arc and the current passing through the furnace charge are used to smelt metal. The energy is generated due to the resistance of the furnace charge. The furnace is continuously operated in an intermittent mode.

[0003] The existing direct current ore heating furnace usually adopts a group of direct current power sources to arrange cathode electrodes on the top of the furnace and anode electrodes on the bottom of the furnace. Alternatively, double upper electrodes are arranged on the top of the furnace. Alternatively, a plurality of groups of direct current power sources are used. The upper and lower electrode layout of the direct current power supply has the advantages of simple structure, energy saving and heat concentration. However, the anode effect in the production process of the direct current furnace cannot be avoided, which causes damage to the bottom of the furnace and the bottom electrode. In addition, the furnace needs to be stopped for treatment during polarity switching. The efficiency of polarity switching is low, which affects the production efficiency and causes large loss. UTILITY MODEL CONTENT

[0004] The utility model aims at providing four electrode direct current ore heating furnace variable polarity power supply device to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: four electrode direct current ore heating furnace variable polarity power supply device, comprising:

[0006] Electrode one, electrode two, electrode three and electrode four, the electrode one, electrode two, electrode three and electrode four are arranged in a rectangular structure.

[0007] The working polarity of the electrode one and the electrode two is adjusted by the polarity adjustable device, and the working polarity of the electrode three and the electrode four is adjusted by the polarity adjustable device. The electrode one, the electrode two, the electrode three and the electrode four form two sides of the electrode group, and the first rectifier device and the second rectifier device are arranged on the two sides. The first rectifier device and the second rectifier device are provided with a water cooler.

[0008] Preferably, the first rectifier device and the second rectifier device are connected with a rectifier transformer, and the first rectifier device and the second rectifier device are connected with the same rectifier controller.

[0009] Preferably, the polarity of the electrode one and the electrode three is opposite, and the electrode one and the electrode three are connected through a load.

[0010] Preferably, the polarity of the electrode two and the electrode four is opposite, and the electrode two and the electrode four are connected through a load.

[0011] Preferably, the first rectifying device comprises:

[0012] The first element group one and the first element group two are installed on the same side of the electrode one and the electrode two in parallel.

[0013] Preferably, the second rectifying device comprises:

[0014] The second element group one and the second element group two are installed on the same side of the electrode three and the electrode four in parallel.

[0015] Preferably, the rectifying controller comprises:

[0016] The redundant digital trigger device is used for the control trigger of the first rectifying device and the second rectifying device.

[0017] The pulse control instrument is used for the control of the electromagnetic signal of the first rectifying device and the second rectifying device.

[0018] The direct current detector is used for the current detection of the first rectifying device and the second rectifying device.

[0019] The technical effects and advantages of the utility model are as follows:

[0020] (1) the utility model discloses a first rectifying device and the setting mode of second rectifying device cooperation, utilize polarity adjustable device, the obvious improvement direct current electric furnace production process in anode effect, be convenient for electrode baking, guarantee production.

[0021] (2) the utility model discloses a first rectifying device and the setting mode of second rectifying device cooperation, adopt high -power rectifying element and constitute according to inverse output principle, simple structure, small, save investment, polarity switches, need not stop furnace, and switching time is short, and cooperate water cooler, make its working temperature low, and the loss is small, and more energy -saving.

[0022] (3) the utility model discloses a redundant digital trigger device, and the reliability is high, and the precision is high, and rectifying pulse control adopts optical fiber transmission, and the anti -interference ability is strong, and the reliability is high, and current detection adopts hall element, and the precision is high, and the detection speed is fast, and the stability is good.

[0023] (4) the utility model discloses a PLC element gathers various operating states, protection signal to complete various measurement and control functions, and rectifying element adopts centralized arrangement, and rectifying circuit arrangement is reasonable, reduces working loss. DRAWINGS

[0024] Figure 1 It is overall structure schematic view of power supply device of the utility model.

[0025] Figure 2 It is structure schematic view of first rectifier device of the utility model.

[0026] Figure 3 It is structure schematic view of second rectifier device of the utility model.

[0027] Figure 4 It is control distribution principle view of power supply device of the utility model.

[0028] In the drawing: 1, electrode one;2, electrode two;3, electrode three;4, electrode four;5, first rectifier device;501, first component group one;502, first component group two;6, second rectifier device;601, second component group one;602, second component group two;7, water cooler;8, rectifier transformer;9, rectifier controller. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0030] The utility model provides four electrode direct current electric arc furnace variable polarity power supply device as Figures 1-4 As shown in the drawing, it comprises:

[0031] Electrode one 1, electrode two 2, electrode three 3 and electrode four 4, electrode one 1, electrode two 2, electrode three 3 and electrode four 4 are arranged in rectangular structure distribution, the polarity between electrode one 1 and electrode three 3 is opposite, and electrode one 1 and electrode three 3 are connected through load, the polarity between electrode two 2 and electrode four 4 is opposite, and electrode two 2 and electrode four 4 are connected through load, the working polarity adjustment between electrode one 1 and electrode two 2 is carried out through polarity adjustable device, the working polarity adjustment between electrode three 3 and electrode four 4 is carried out through polarity adjustable device, through the four electrode settings of electrode one 1, electrode two 2, electrode three 3 and electrode four 4, it is convenient for the multi-electrode direct current power supply processing of electric arc furnace, improves the stability of electric arc furnace power supply, and when polarity switches, it is not necessary to stop furnace, the switching time is short, and the working efficiency of electric arc furnace is high.

[0032] Furthermore, a first rectifier 5 and a second rectifier 6 are respectively provided on both sides of the electrode group formed by electrodes 1, 2, 3, and 4. The first rectifier 5 includes a first element group 501 and a first element group 502, which are connected in parallel on the same side of electrodes 1 and 2. The second rectifier 6 includes a second element group 601 and a second element group 602, which are connected in parallel on electrodes 3 and 4. On the same side, the first component group 501, the first component group 502, the second component group 601, and the second component group 602 all use high-power rectifier components and are composed according to the reversible output principle. The reversible output principle means that for any given output, a system can uniquely determine a corresponding input. Such a system has a bidirectional correspondence, that is, the input can uniquely determine the output, and the output can also be uniquely restored to the input in some way. Compared with the traditional reversible device composed of mechanical switches, it has the functions of simple structure, small size, and investment saving.

[0033] Furthermore, both the first rectifier 5 and the second rectifier 6 are equipped with water coolers 7. These water coolers 7 cool the first rectifier 5 and the second rectifier 6, resulting in lower operating temperatures, lower losses, and higher energy efficiency. Both the first rectifier 5 and the second rectifier 6 are connected to rectifier transformers 8 and are connected to the same rectifier controller 9. The rectifier controller 9 includes a redundant digital trigger device, a pulse controller, and a DC current detector. The redundant digital trigger device is used for controlling and triggering the first rectifier 5 and the second rectifier 6. This redundant digital trigger device, such as an IGBT trigger device, ensures reliable operation during power system faults, protecting the power equipment and system. It offers high reliability and high accuracy. The pulse controller controls the electromagnetic signals of the first rectifier 5 and the second rectifier 6. The pulse controller uses fiber optic transmission, providing strong anti-interference capabilities and high reliability. The DC current detector detects the current in the first rectifier 5 and the second rectifier 6. The DC current detector uses Hall elements, offering high accuracy, fast detection speed, and good stability.

[0034] The first component group 501, the second component group 502, the first component group 601, and the second component group 602 on the first rectifier 5 and the second rectifier 6 use PLC components to collect various operating statuses and protection signals, and complete various measurement and control functions. Furthermore, the first rectifier 5 and the second rectifier 6 are arranged in a centralized manner, with a reasonable arrangement of rectifier circuits, which reduces working losses and improves production efficiency.

[0035] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A four-electrode direct current submerged arc furnace variable polarity power supply device, comprising: electrode one (1), electrode two (2), electrode three (3) and electrode four (4), the electrode one (1), electrode two (2), electrode three (3) and electrode four (4) are arranged in a rectangular structure; characterized in that: the electrode one (1) and the electrode two (2) are adjusted by the polarity adjustable device, the electrode three (3) and the electrode four (4) are adjusted by the polarity adjustable device, the electrode one (1), the electrode two (2), the electrode three (3) and the electrode four (4) form the two sides of the electrode group, respectively provided with first rectifier device (5) and second rectifier device (6), the first rectifier device (5) and the second rectifier device (6) are provided with water cooler (7).

2. The four electrode DC arc furnace variable polarity power supply of claim 1, wherein, The first rectifier device (5) and the second rectifier device (6) are connected with rectifier transformer (8), the first rectifier device (5) and the second rectifier device (6) are connected with the same rectifier controller (9).

3. The four electrode DC arc furnace variable polarity power supply of claim 1, wherein, The polarity of the electrode one (1) and the electrode three (3) is opposite, and the electrode one (1) and the electrode three (3) are connected through the load.

4. The four electrode DC arc furnace variable polarity power supply of claim 1, wherein, The polarity of the electrode two (2) and the electrode four (4) is opposite, and the electrode two (2) and the electrode four (4) are connected through the load.

5. The four electrode DC arc furnace variable polarity power supply of claim 1, wherein, The first rectifier device (5) comprises: first element group one (501) and first element group two (502), the first element group one (501) and the first element group two (502) are installed on the same side of the electrode one (1) and the electrode two (2).

6. The four electrode DC arc furnace variable polarity power supply of claim 1, wherein, The second rectifier device (6) comprises: second element group one (601) and second element group two (602), the second element group one (601) and the second element group two (602) are installed on the same side of the electrode three (3) and the electrode four (4).

7. The four electrode DC arc furnace variable polarity power supply of claim 2, wherein, The rectifier controller (9) comprises: redundant digital trigger device, the redundant digital trigger device is used for the control trigger of the first rectifier device (5) and the second rectifier device (6); pulse control instrument, the pulse control instrument is used for the control of electromagnetic signal of the first rectifier device (5) and the second rectifier device (6); direct current detector, the direct current detector is used for current detection of the first rectifier device (5) and the second rectifier device (6).

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