INVESTIGATION OF FUEL UTILIZATION AND THERMAL OPERATION IMPROVEMENT OF PUSHER TYPE FURNACE IN HOT ROLLING SHOP OF IRON & STEEL COMPANY
أحمد أمين بدوي
معهد التبين للدراسات المعدنية · مصر
The main purpose of the studies in the el -tab bin metallurgical institute "is to prepare the engineer for the developing of our national metallurgical industry in a. R. E " according to this aim and with respect to my speciallity as " metallurgical furnaces " the diploma project task is an investigation of fuel utilization and thermal operation improvement of pusher - type furnace in hot rolling shop of iron & steel co the existing pusher - type furnace in the I & st. Go has many problems in thermal regime and heat consumption through the furnace zones mixing of blast furnace gas as a poor kind of fuel with rich ones is one of the main problems in the hot rolling shop. Of course, the minimizing of mazut usage is the main requirement of the investigation of fuel mixing in the second chapter of this project. Mixing ratio o75 between blast furnace gas and mazut with respect to thermal effect was found the optimum to maintain the best flame characteristics with air preheating temperature - 400 c. The result of this study is to save 33.3 % of mazut consumption in the shop. In the third chapter the effect of the influence of metal surface temperature at the end of preheating zone on the thermal stresses and productivity at the furnace was discussed in detail. It was found that the optimum value of this temperature is 500 c for preheating billets with thickness up to 160 mm: and the corresponding raticm between time of preheating and total heating time, to reach this temperature in the furnace is about 0.32. In the seventh chapter the problem of the furnace recon-striation was discussed: some recommendations are given. It is suggested to change the direction of burners in the upper heating zone, because the present positions of these burners encourage air leakage through the charging causing the cooling of heating zone and a very high rate of metal oxidation. The productivity of the furnace after its reconstruction may reach 33 tons / hour : in the present case of parallel flow of combustion products and metal the productivity is only 12 - 15 t / hr I hope that this study serve to the development steps of our metallurgical industry in a . R. E
العلوم الاجتماعية › العلوم الاقتصادية › الانتاج › الصناعة · العلوم التطبيقية والتكنولوجيا › الهندسة الكيميائية › التعدين › افران الصهر