Device and method for controlling liquid level of liquid electroslag continuous casting slag pool

Abstract

The invention discloses a device and a method for controlling the liquid level of a liquid electroslag continuous casting slag pool and belongs to the technical field of metal electroslag remelting. The device comprises an AC power supply, a heavy-current water cooled cable, a heavy-current detection element, an upper crystallizer, a lower crystallizer, an insulating layer, a supporting platform, a supporting upright post, a dummy ingot conducting bottom water tank, a stripping platform, a stripping motor and a controller. The control method for the device comprises the following steps of: 1, acquiring a current change value; 2, transmitting the current change value serving as a negative feedback signal into the controller; and 3, using the preset current as a positive signal by the controller, and instantaneously adjusting the upper and lower positions of the stripping platform through the stripping motor by using the positive signal and the negative feedback signal so as to make the current in a power supply loop equal to the set current value in the controller. The device and the method have the advantages of capacities of timely and accurately reflecting the change condition of molten steel liquid level and accurately controlling the liquid level position of the slag pool, simple and direct control process, and environmental protection and low maintenance cost of the whole device.

Description

Technical field: [0001] The invention belongs to the technical field of metal electroslag remelting, in particular to a device and method for controlling the liquid level of a liquid electroslag continuous casting slag pool. Background technique: [0002] At present, the control method of the liquid level of the liquid electroslag continuous casting slag pool is mainly to measure the molten steel or slag liquid level first, and then carry out smelting control according to the measured liquid steel or slag liquid level position. The existing liquid level position measurement The methods mainly include thermocouple method, electromagnetic method and ray method. [0003] The control device used by the thermocouple method is composed of a thermocouple and a measuring circuit. The thermocouple is placed at a fixed position. When it touches the liquid surface of the slag pool, it will detect the temperature change. From determining the position of the liquid surface, due to the co...

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Problems solved by technology

[0006] In order to overcome the shortcomings of the existing liquid electroslag continuous casting slag pool liquid level control method, the present invention provides a liquid electroslag continuous casting slag pool liquid level control device and method, which can timely and accurately control the liquid electroslag continuous casting smelting The liquid level of the slag tank changes during the process, and the whole device is environmentally friendly and the maintenance cost is very low

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