A three-phase layered combined electrode ore-thermal smelting furnace and its control method

Abstract

The invention discloses a three-phase layered combined electrode submerged thermal smelting furnace and a control method thereof. The electrodes of the three-phase layered combined electrode submerged thermal smelting furnace adopt layered combined electrodes. A layered composite electrode includes a central axis electrode in the central axis part and a peripheral hollow electrode. There is a gap between the two electrodes, and the electrode ends of the two electrodes have different immersion depths. Since the layered combination electrodes limit the flow direction of the current in the furnace, compared with the traditional cylindrical electrode submerged smelting furnace, the current passing area in the three-phase layered combined electrode submerged smelting furnace is enlarged, which weakens the flow caused by the alternating current. The uneven distribution of the electromagnetic field in the furnace caused by the current skin effect not only improves the local overheating problem in the furnace, but also improves the energy utilization efficiency in the furnace, which can be widely used in the metallurgical and chemical industries.

Description

technical field [0001] The invention belongs to the field of metallurgical and chemical production, and in particular relates to a three-phase layered combined electrode submerged thermal melting furnace and a control method thereof. Background technique [0002] As an important part of industrial production, submerged thermal melting furnace is widely used in metallurgical and chemical industry. With the development of society, the energy consumption, production capacity and emission requirements of submerged thermal smelting furnaces are getting higher and higher, and new optimal design methods of submerged thermal smelting furnaces are constantly being applied to submerged thermal smelting furnaces. In the existing technology, the electrodes of the three-phase submerged thermal melting furnace are mostly cylindrical electrodes. When the electrodes are inserted into the charge for submerged arc operation, the energy of the arc at the end of the electrode and the resistance...

AI Technical Summary

Problems solved by technology

However, due to the inductive reactance effect of alternating current, there is a serious skin phenomenon when the current flows through the inside of the electrode, which causes the current to be mainly distributed on the outer surface side of the electrode, causing more current to flow out from the outer wall surface of the electrode end, which in turn causes the furnace Seriously uneven distribution of inner Joule heat

The charge in other positions in the furnace can only receive heat through heat conduction and natural convection, which seriously weakens the smelting performance of the submerged melting furnace.

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