Numerical Analysis of the Effect of Reduction Gas Composition and Temperature on the Quality of Sponge Iron Product

Abstract

Reduction zone of iron ore reactor have been simulated. This is a part of counter current gas-solid reactor for producing sponge iron. The aim of this research is to study the effect of reduction gas composition and temperature on quality and product capacity of sponge iron products through mathematical modeling arrangement and simulation. Simultaneous mass and energy balances along the reactor lead to a set of ordinary differential equation which includes kinetic equations. Kinetic equations of reduction of hematite to iron metal, methane reforming, and water gas shift reaction are taken into account in the model. Hydrogen and carbon monoxide are used as reduction gas. The equations were solved by finite element method. Simulation result shows an increase in H 2 composition while an attenuation of CO will produce higher metallization degree. Metallization degree is also increased with an increase in gas inlet temperature. Reduction gas temperature over than 973 o C (1246 K) is not recommended because the formation of sticky iron will be initiated.

Hydrogen production from steam reforming of coke oven gas and its utility for indirect reduction of iron oxides in blast furnace

“…If COG is processed via SR, synthesis gas (or syngas) will be produced; the related reactions from SR of COG are listed in Table 2. Once CO and H 2 are generated, they both can be adopted as reducing agents for IR of iron ore. i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 7 ( 2 0 1 2 ) 1 1 7 4 8 e1 1 7 5 8 Reviewing literature indicates that IR of iron oxides has been investigated through mathematical model [30], experimental study [18,31,32] and kinetic analysis [33,34]. Table 3 gives a brief summary of related research of iron oxide reduction.…”