Replacement of metallurgical coke by pulverized coal (PC) injected in blast furnace (BF) tuyeres is a major economical challenge, due to the high price of coke and unfavorable effect of its production for the environment. But the difficulty consists in necessity of complete gasification of coal particles within raceway and compensating for the negative changes in technology. Theoretical Increase of flame temperature due to increment of oxygen concentration was compensatedby increasing natural gas (NG) and PC consumptions.Productivity in account to equal conditions with rela-36 (1996), No. 10
Mejoras tecnológicas en el proceso de inyección de carbón pulverizado en el horno alto^*^Se estudia la tecnología de operación del horno alto con inyección de carbón pulverizado (ICP) con el fin de sustituir el máximo posible de coque siderúrgico en la carga y se analizan aspectos de la combustión del carbón pulverizado (CP) y los métodos y dispositivos elaborados para intensificar su combustión en la zona de toberas del horno alto. Se ofrecen recomendaciones para optimizar la molienda del carbón, se estudia la problemática de la distribución del CP a lo largo de la periferia del horno y se describe una tecnología elaborada para compensar las perturbaciones producidas por la inyección de CP en el horno alto sobre diferentes parámetros, tales como grado de reducción directa, intercambio térmico y otras.Palabras clave: Carbón pulverizado. Inyección de carbón pulverizado. Toberas. Horno alto.
Technological improvements in the pulverized coal injection process in the blast furnace AbstractBlast furnace operation technology with pulverized coal injection (PCI) has been carried out in order to replace the máximum amount of metallurgical coke in the burden. PC burning has been studied and methods and designs for the intensification of its combustión have been developed within the raceway. Recommendations for optimizing coal grinding have been developed. Problems of PC distribution inside the circumference of the furnace were investigated. Compensating technology for changes in reduction, heat exchange and other processes under PCI have been developed.
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