On the Semi-Pilot Plant for Fluidizing Reduction.

Study on pilot plant of fluidizing reduction-III

Abstract

A semi-pilot plant was constructed for development of fluidizing reduction of iron are (inner dia. =350mm: outer dia. =800mm: height=7m.) At first, a triple hearth type which consisted of heating, prereduction and final reduction was operated but abandoned owing to two defects.
Next, the furnace was reconstructed into a double hearth type. By this reconstruction, steady operation could be assured. By blowing 600°C hot gas, and heating the ore up to 900 °C, good reduction results could be attained. Consumption of coke oven gas was 2, 800Nm³/ton-M. Fe, nearly 1 in terms of gas excess ratio. If cracked gas is used, the consumption of coke oven gas must be 1, 000Nm³/ton-M. Fe.