METHOD FOR CONTROL OF AIR TUYERE OF BLAST FURNACE WITH THERMAL INSULATION FROM BLASTING CHANNEL Russian patent published in 2017 - IPC C21B7/16 C21B7/24 

FIELD: metallurgy.

SUBSTANCE: in method for control of heat insulation state from blasting channel of air tuyere of blast furnace, difference between consumption of incoming and outgoing flow of cooling water for tuyere is defined, average value of incoming and outgoing flows temperatures difference for certain intervals and temperature difference RMS deviation from an average value are calculated, average value of the temperature difference over the current time interval is compared with average value of temperature difference over the preceding time interval, current values of consumption difference of incoming and outgoing flow of cooling water for tuyere are compared with the overall accuracy of measurements of flowmeters, and in case of increase of average value of temperature difference over the current time interval relative to average value of temperature difference over the preceding time interval to a value larger than RMS deviation over the current time interval at difference value of the said consumption of water flows withinthe overall accuracy of measurements of flowmeters, start of heat insulation destruction is recorded, and in case if value of the said water flows difference is larger than the overall accuracy of measurements of flowmeters, tuyere heat insulation burnout is recorded.

EFFECT: invention allows to determine start of thermal insulation destruction from blasting channel of air tuyere of blast furnace.

2 cl, 1 ex