Method and apparatus for continuously measuring carbon, hydrogen and nitrogen concentration in molten steel and method and apparatus for rapidly measuring trace carbon in molten steel

摘要

The present invention provides a method and apparatus for continuously measuring the concentrations of carbon, hydrogen, and nitrogen in a molten steel in a single apparatus, and a principle of this concentration measurement is provided for a method for measuring only trace carbon, And an apparatus embodying these methods.;According to the present invention, a carrier gas, which is selected in accordance with an element to be measured in molten steel, is blown into molten steel and bubbled into the molten steel to circulate or pass the carrier gas containing the measurement object element recovered from the molten steel in the gas circulation circuit, The concentration of the element to be measured in the gas is equalized to the concentration of each element in the molten steel or is brought close to the equilibrium state and then the concentration of the specific element in the carrier gas is measured by the specific element concentration measuring means, The measured carrier gas is discharged out of the circulating circuit system and the carrier gas is changed again to repeat the above procedure for other elements not measured.