FURNACE CONTROL FOR MANUFACTURING STEEL USING SLAG HEIGHT MEASUREMENT AND OFF-GAS ANALYSIS SYSTEMS

摘要

Embodiments of the invention comprise measuring the slag height level using a slag height level measurement system, as well as analyzing the off-gas components in a furnace using an off-gas analysis system in order to more efficiently control the furnace during a steelmaking process. The slag height level measurement system and the off-gas analysis system may be utilized to determine when the scrap steel has melted, when the slag height level has decreased, and if the slag height level has decreased due to deficient carbon and/or oxygen, or excess carbon and/or oxygen in the furnace.

主权项

1. A method of manufacturing steel, comprising:
monitoring a slag height level in the EAF using a slag height measurement system; monitoring a carbon indicator level exiting the furnace in real-time or near-real time using an off-gas analysis system; determining to increase carbon or oxygen injected into the EAF when the slag height level is below a slag height threshold level and the carbon indicator level is below a carbon indicator threshold level to return the carbon indicator level to above the carbon indicator threshold level, and to return the slag height level to above the slag height threshold level; and determining to decrease the carbon or the oxygen injected into the EAF when the slag height level is below the slag height threshold level and the carbon indicator level is above the carbon indicator threshold level to maintain the carbon indicator level above the carbon indicator threshold level, and to return the slag height level to above the slag height threshold level.