Calcia refractory composition for refining and desulfurization method using said composition

Abstract

Abstract PURPOSE:To improve desulfurizability and to improve the slaking resistance of a furnace wall by allowing Al to exist in a vacuum in the molten metal in a melting furnace lined with calcia refractories contg. a specific ratio of Cr2O3. CONSTITUTION:The metal or molten metal in the melting furnace or vessel lined with the calcia refractories contg. <=10wt% Cr2O3 is desulfurized while the Al is made to exist in the vacuum or non-oxidative atmosphere. The content of the Cr2O3 is preferably in a 2-8wt% range and the content of CaO in the calcia refractories is made about >=60wt%. The Al is made to exist at about 0.1-20wt% in the molten metal. The total of the contents of CaC2, Al2O3, C, etc., in the calcia refractories is made about <=15wt% and the content of Fe oxide about <=5wt%. Powerful desulfurization and deoxidation are thus executed and the slaking resistance of the furnace wall is improved.

Inventors

• 👤 Toru Degawa
• 👤 出川　通
• 👤 Akio Hashimoto
• 👤 昭夫 橋本

Bibliographic Details