Tundish preheating automatic control method based on continuous temperature measurement

Abstract

The invention relates to a tundish preheating automatic control method based on continuous temperature measurement. The method is mainly characterized in that an online temperature measurement thermocouple is pre-buried in a tundish through a three-dimensional positioning method, and preheating temperature of the tundish is detected in real time; four preheating intervals including small fire, medium fire, big fire and heat preservation are divided according to target preheating temperature (1100 DEG C to 1300 DEG C) of the tundish and preheating time requirement of the tundish; and the temperature rise speed of a tundish refractory is controlled, target interval temperature is set for the corresponding preheating intervals to achieve normal preheating temperature rise, the air excess coefficient range of the air-fuel ratio is set to control the combustion flame length and the baking effect, and then control according to the target temperature is realized. According to the method, the defect that the baking effect is judged according to manual experience is avoided, meanwhile, due to real-time feedback control in the preheating process, the baking efficiency is guaranteed, in addition, the hidden danger including over-baking and fire deficiency of the baking refractory is avoided, therefore, the baking energy consumption is saved to a certain degree, and the energy-saving effect is remarkable.

Description

technical field [0001] The invention relates to a control method, in particular to an automatic control method for tundish preheating based on continuous temperature measurement, and belongs to the technical field of iron and steel metallurgy tundish preheating. Background technique [0002] In the current continuous casting process of the iron and steel industry, online rapid replacement of tundishes is a very mature and widely used technology. The quick-change tundish can ensure the continuous production of the continuous casting process, and is the most basic technical guarantee for the stable and high production of the continuous casting process. Quickly replace the tundish, that is to quickly drive away the tundish that has reached the end of its service life through the tundish car, and at the same time transport the spare tundish that has been preheated to meet the requirements to the production position (casting position) by the tundish car, and continue to play the ...

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Problems solved by technology

The only mentioned application number is CN201610510491, the dynamic control device and control method of continuous casting submerged nozzle preheating, and the preheating process of the tundish is still controlled according to the preheating gas flow rate for a certain period of time, but how to accurately and effectively use the current Some continuous temperature measurement processes realize automatic control of tundish preheating and quickly and effectively meet the process requirements of tundish baking. At present, there is no new process development and announcement

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