LANCE EQUIPMENT, REFINING FURNACE USING THE SAME, AND LANCE POSITIONING METHOD

摘要

PROBLEM TO BE SOLVED: To provide: lance equipment capable of positioning a lance for blowing reactant gas to an adequate position independently of the absolute position of the surface of the molten metal in a refining furnace; a refining furnace using the lance equipment; and a lance positioning method.SOLUTION: Lance equipment 20 for blowing reactant gas onto molten metal in a refining furnace includes: a lance 21 configured to blow the reactant gas; a driving mechanism 24 configured to move the lance 21 toward and away from a surface of the molten metal; and a detector 22 configured to detect a parameter indicating a reaction state, in which the reactant gas and the molten metal react with each other in a striking region where the reactant gas blown from the lance 21 toward the surface of the molten metal strikes on the surface of the molten metal. The lance 21 is configured so as to be positioned to an adequate position on the basis of a value of the parameter indicating the reaction state.