| 摘要 |
PURPOSE:To reduce abrasion owing to lime powder by compositively plating inorganic abrasion resistant fine powder together with Ni, Co, etc. on the inside circumferential surfce of the inside pipe in the concentrical double pipe tuyere wherein refining O2 gas and lime powder are flowed in the inside pipe and cooling gas is flowed between the inside and outside pipes. CONSTITUTION:The inside circumferential surface of he inside pipe of the double pipe tuyere t consisting of an inside pipe 1 having a path 4 in which refining O2 gas and lime power are flowed and a path 5 (between the inside pipe 1 and outside pipe 2) where cooling gas is flowed is compositively plated by the following, whereby a lining layer 6 is formed. Namely, inorganic abrasion resistant fine powder such as SiC fine powder is compositively plated together with one or more kinds of Ni, Co, Cr, Cu, Fe etc. According to this method, the lining layer 6 of the inside circumferential surface of the inside pipe may be made thinner in thickenss, the improvement in cooling efficiency becomes possible. |
