Molten iron liquid level detection method and device for converter molten iron desulphurization

Abstract

The invention discloses a molten iron liquid level detection method and device for converter molten iron desulphurization. According to the molten iron liquid level detection method, a programmable logic controller reads driving current from a frequency converter of a lifting motor which drives a stirring head and sets the size of the driving current utilized by the frequency converter as an initial current value when the stirring head is located above the molten iron liquid level; the stirring head is driven by the lifting motor to move towards the molten iron liquid level from the position above the molten iron liquid level; the programmable logic controller collects the real-time driving current of the frequency converter, calculates the specific value of the initial current value to the real-time driving current and compares the specific value with a preset value; if the specific value is smaller than the preset value, the programmable logic controller collects electric signals of an encoder arranged on the lifting motor of the stirring head to obtain a height value of the stirring head and adds the height value with a compensation value corresponding to the preset value so as to obtain a height value of the molten iron liquid level.

Description

technical field [0001] The invention relates to the field of desulfurization of molten iron in converter metallurgy, in particular to a method and device for detecting the liquid level of molten iron in converter metallurgy. Background technique [0002] The desulfurization process of mechanical stirring method is to lower the cross-shaped stirring head to a certain depth in the molten iron in the molten iron tank, and fully contact and react the desulfurizing agent and molten iron through rotation and agitation to achieve the purpose of desulfurization. During the desulfurization process of molten iron in converter metallurgy, the "one-key desulfurization" method automatically collects the data of molten iron weight, temperature, sulfur content, and silicon content, and calculates the amount of desulfurization agent added. A series of actions such as opening the dust removal valve, lowering the stirring head, preparing materials, detecting the liquid level of molten iron, i...

AI Technical Summary

Problems solved by technology

This method of detecting the liquid level of molten iron is time-consuming and laborious. The rise and fall of the stirring head wastes a lot of production time, and the use of visual judgment will inevitably lead to errors, and it is impossible to accurately know the real level of molten iron.

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