Control system of electric drive for oxygen converter lance

One of the most important factors determining the oxygen converter production rate is its operation ratio. Operation ratio improvement of an oxygen converter is related directly with reduction of the unit out-of-service time caused by the melt slopping through the vessel mouth on the vessel shell and other production equipment. The results of experimental and theoretical studies of the oxygen converter shell vibration acceleration in the normal operating mode and in the mode prior to the melt slopping are given in the article. The authors determined the equations for the calculation of the likelihood ratio of the diagnostic properties sets belonging to the diagnostic areas of the threat of the melt slopping. The diagnostic method of the threat of the melt slopping from the oxygen converter and the function circuit of the testing system are also offered. Introduction of the computer program/application ≪MK≫ at the oxygen converters No. 1,2 of the OJSC ≪MMK≫ resulted in reduction in the number of false alarms by 7 times compared with the system ≪MONTOPNHR/Monitoring-K≫The research group offered the functional circuit and the algorithm of automatic control of electric drive for the oxygen lance preventing the melt slopping from the converter.