Double-electrode DC arc furnace arc ignition device and method thereof

A technology of DC electric arc furnace and arc striking device, which is applied in the direction of electric heating device, electrical components, heating through discharge, etc. It can solve problems such as unstable arc striking, generation of graphite electrode fragments, blocking slag discharge port, etc., and achieves strong operability , High success rate of arc striking, characterization method and clear effect of data

CN110167226APending Publication Date: 2019-08-23JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-08-23

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Abstract

The invention discloses a double-electrode DC arc furnace arc ignition device and method thereof. The device includes a melting furnace, a DC power source, an anode electrode, a cathode electrode, ananode voltage measuring unit, a cathode voltage measuring unit, an arc ignition metal plate, a metal ground electrode and a thermocouple, wherein one end of an anode resistor is connected with a positive pole of the DC power source, one end of a cathode resistor is connected with a negative pole of the DC power source, the other end of the anode resistor and the other end of the cathode resistor are grounded, both ends of the anode voltage measuring unit are respectively connected with both ends of the anode resistor, both ends of the cathode voltage measuring unit are respectively connected with both ends of the cathode resistor, the arc ignition metal plate is horizontally disposed on an upper side of a solidified slag layer, the metal ground electrode penetrates into the melting furnacefrom a lower end of the melting furnace, an upper end of the metal ground electrode is in contact with a solidified metal layer, a lower end of the metal ground electrode is grounded, and the thermocouple is placed inside the metal ground electrode. The device is advantaged in that the device has strong operability and high success rate of arc ignition and can be easily transformed into an automatic control program to realize automatic arc ignition.
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Description

technical field

[0001] The invention relates to an electric arc furnace arc striking device and its method, in particular to a double-electrode DC electric arc furnace arc striking device and its method. Background technique

[0002] DC plasma arc melting technology is currently the more commonly used fly ash / inorganic waste melting furnace method. The fly ash / inorganic waste is melted by the thermal energy generated by the DC arc. Double-electrode DC arc technology, such as CN201710305547.6, uses double electrodes as cathode and anode, which eliminates the need for conductive furnace bottom electrodes, simplifies the design of the furnace bottom structure, and has good process controllability. The bottom of the double-electrode electric arc furnace is equipped with a metal layer grounding device to detect the voltage on the cathode side and the anode side, and to perform arc ignition steps, such as image 3 shown. Here, we define the arc ignition stage from the start of t...

Examples

Embodiment Construction

[0035] The present invention will be described in further detail below through examples, and the following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0036] like figure 1 As shown, a double-electrode DC electric arc furnace arc striking device of the present invention includes a melting furnace 1, a DC power supply 2, an anode electrode 3, a cathode electrode 4, an anode voltage measurement unit 5, a cathode voltage measurement unit 6, and an arc ignition metal plate 7. The metal ground electrode 8 and the thermocouple 9, the anode electrode 3 is connected to the positive pole of the DC power supply 2, the cathode electrode 4 is connected to the negative pole of the DC power supply 2, the anode electrode 3 and the cathode electrode 4 are slidingly arranged on the upper end of the melting furnace 1, and the anode resistance 10 is at one end Connect to the positive pole of the DC power supply 2, one e...