A tribosystemic approach to refractory lining destruction in blast furnaces.pdf

l l l l l WEAJI E L S E V I E R Wear 2t6 ( I,~,Js ~ zsi-,61 A tribosystemic approach to refractory lining destruction in blast furnaces Ion Crudu *, Mircea-Petre ionescu h.~ Viore! Munleanu ~, lon-FIorentin Sandu:2 Paraschiv Nedelcu ~ Ma(hine.~ Paris Department. l/nit.er~ily ,~[ Gahtt-i. Sir. U~mmraxco tire. 47. Gfdat:i 621,V). Rotttrmio SC ICPPAM. Sir. Smonl~ln no. 2. Galot=i 621X). RoBlaniu SC .ilDEy(. SIr. Sm,r lhm nr,. 2. Go la l : i 6200. RommmJ Received 2 July 1997: accepted 13 February iq~)8 Abstract The paper applies tribological principles to the study of blast furnaces lining destruction pr~:esscs. The bla.,,t furnace is presumed to be a complex tribosystem comprising specific zones: throat, upper stack, middle stack, lower stack, belly. Ix~sh. tuyeres, hearth wall. lx~ttom of the hearth. A systemic study of destruction processes permits the elal~wation of specific constructive solutions fiw blast furnace z(mes. ? 1998 Elsevier Science S.A. All rights re~rved. Keywords: Blast furnace: Triix~system: Brickwork: Wear: D~struction I. I n t r o d u c t i o n In the paper, trilx)logy principles are applied to the study of blast furnace brickwork destruction [ i - 3 I. A blast furnace is an aggregate intended for the transformation of iron ores into liquid iron. Over 500* I O ~ t liquid iron are produced yearly in hundreds of blast furnaces all over the world. In a blast furnace where the charge lowers with a velocity of I m m / s processes during a 15-year campaign granular materials able to form a cyl inder with its diameter equal to the diameter of the blast furnace throat and a length of more than 380 km if the coefficient of operation time utilization is 0.8, The rough external surface of this cylinder lowers in contact with the wall in countercurrent with the amending blast furnace gas. In the whole blast furnace inner volume therc permanently exist solid, liquid, and gaseous materials engaged in mechan- ical process