Equipotential control device and method for plasma heating of continuous casting tundish

Abstract

The invention relates to an equipotential control device and method for plasma heating of a continuous casting tundish and belongs to the technical field of process equipment for continuous casting ofmetal slabs. The equipotential control device for the plasma heating of the continuous casting tundish is controlled by a PLC control system, and a slag layer and molten steel are contained in the tundish. The equipotential control device comprises steel wires embedded between refractory material layers of the tundish, the steel wires are connected to a zero potential sampling point of the PLC control system, one ends of the steel wires are exposed out of the bottom of the tundish by about 3-5 mm, the other ends of the steel wires are connected with galvanized round steel and are reliably connected with a tundish shell, the galvanized round steel is connected with an insulated flexible circuit conductor, the insulated circuit conductor is connected with an electrode, the electrode is mounted on a lifting device, and the PLC control system is connected with and controls the lifting device. According to the device and the method, through the liquid level change when the molten steel israised or lowered, the PLC system can perform feedback and adjustment in time and control the raising or lowering of the electrode so as to guarantee the effective change of the arc length, and the stability of heating is ensured.

Description

technical field [0001] The invention relates to an equipotential control device and method for plasma heating of a continuous casting tundish, and belongs to the technical field of process equipment for continuous casting of metal slabs. Background technique [0002] The tundish is the key equipment on the continuous casting machine to use the liquid metal as a buffer before solidification and forming. It has the functions of connecting the supply of molten metal and improving the cleanliness of the molten metal, and plays a decisive role in the quality and production efficiency of steel products. [0003] The constant temperature pouring of molten metal in the tundish is an important goal in the continuous casting production, and it is a necessary condition to ensure the quality of the continuous casting slab and the stable and smooth production. In the existing tundish plasma heating equipment, without external supplement, it is difficult to keep the temperature of the mol...

AI Technical Summary

Problems solved by technology

With the existing tundish plasma heating equipment, without external supplement, it is difficult to keep the temperature of the molten metal in the tundish stable, and its fluctuation range reaches 40 degrees

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