FLUX USED IN ELECTRO-SLAG REMELTING PROCESS, METHOD FOR PRODUCING SAID FLUX, AND METHOD FOR PRODUCING HIGH-PURITY STEEL

摘要

This flux is used in an electro-slag remelting process. When the water content of said flux as determined by the Karl Fischer method is denoted by W, and the change in the water content after leaving alone said flux in an environment of 30ºC and 85% RH for 14 days is denoted by ∆W, W is 0.03 mass% or less and ∆W is 0.01 mass% or less. Said flux preferably contains CaF₂ and Al₂O₃.