A Folw-chart for Iron Making on the Basis of 100% Usage of Process Oxygen and Hot Reducing Gases Injection

Abstract

Presented new ironmaking process on the basis of 100% usage of oxygen and hot reducing gas injection into the No. 2 blast furnace (1033 m³) at RPA Toulachermet. The process involves blast furnace top gas cleaning, compressing, removal carbon dioxide through chemical absorption, preheating the gas in the hot blast stove regenerators, and blowing into the furnace through tuyeres in place of the hot blast. This use of hot reducing gas (HRG) is accompanied by oxygen injection through each tuyere. There have been 13 trials of this technique in the period 1985-90 producing 250000 t of hot metal. In one particular trial the coke rate of 367 kg/thm was achieved with 251 m³/thm of oxygen while producing 1700 thm/day of 2.2% silicon iron.