Method of injecting synthetic resin material fuel in metallurgical furnace, synthetic resin material fuel for producing pig iron and method of producing pig iron in blast furnace using the same

摘要

PROBLEM TO BE SOLVED: To provide a method for blowing synthetic resin material fuel while keeping stable furnace condition in a metallurgical furnace. SOLUTION: The blowing method of the synthetic resin material fuel from a tuyere when a pig iron is produced in the metallurgical furnace uses the granulated synthetic resin material fuel which contains =70 mass% within 20% the average grain diameter and which is produced by solidifying after applying a melting process to the resin material. As the above synthetic resin material fuel, the granulated material containing =0.05 mass% ratio of moisture therein or the pellet satisfying the following three formulas, i.e., 1.0=X=10, 2=Y=20 and Y/X=1.5, assuming the thickness as X mm and the diameter as Y mm, may be adopted for this blowing method.