METHOD FOR THEORETIC COMBUSTION TEMPERATURE OF RACE WAY DURING BLAST FURNACE PULVERIZED COAL INJECTION OPERATION

摘要

PURPOSE: A method for theoretic combustion temperature of race way during blast furnace pulverized coal injection operation is provided which calculates theoretic combustion temperature to calculate accurate theoretic combustion temperature, effectively analyze blast furnace operation, grasp proper degree of thermal compensation and perform stable operation. CONSTITUTION: The method comprises a step of inputting thermodynamic data; a step of inputting operation conditions including blowing amount, blowing temperature, blowing humidity, oxygen enrichment amount, pulverized coal injection quantity and constituents of pulverized coal injected together with the thermodynamic data; a step of setting up a material balance for reaction system and formation system of CO gas amount, H2 gas amount and N2 gas amount, wherein the reaction system includes oxygen enrichment ratio obtained by oxygen amount during blowing, nitrogen amount during blowing and oxygen amount by oxygen enrichment, carbon in coke to be burnt calculated by blowing air humidity and pulverized coal injection quantity, and carbon, oxygen, hydrogen and nitrogen in injected pulverized coal obtained using pulverized coal constituent analysis table; and a step of calculating enthalpy in race way.