Midrex shaft process

Shaft process is one of method to iron making process

1. MIDREX PROCESS The “Midrex Process” using The midrex Shaft Furnace to converts iron oxide in pellet or lump form into highly metallized direct reduced iron.

2. Con’t “Simple Process” Most naturally occuring iron ore exist as hematite (Fe 2 O 3 ). In this process, the chemically bonded oxygen in the iron ore is removed using a high temperature reducing gas composed of “hydrogen (H 2 ) and carbon monoxide (CO)” to produce metallic iron (Fe)

3. Feed Materials It has processed iron oxide pellets and lumps ores forms Feed materials have low grade high sulfur

4. Reducing Gas To create reducing gas from “natural gas”. The natural gas must be first be reformed into hydrogen (H 2 ) and carbon monoxide (CO) The MIDREX process typically uses natural gas as the reductant and fuel by means of the unique MIDREX REFORMER

5. Con’t MIDREX REFORMER converts recycled offgas from the midrex shaft furnace plus fresh natural gas into hydrogen (H 2 ) and carbon monoxide (CO)

6. Con’t Natural gas plus recycled top gas is heated in a refractory lined furnace and catalytically reformed The use of recycled gas and the ability to feed hot reformed gas to the shaft furnace without quenching and reheating provide for a very efficiently process

7. Con’t

8. Shaft Furnace High quality reducing gas is introduced into the burden where the metallization is highest and then passes through the burden in counter-flow to the decreasing solids (iron oxide being converted into metallic iron)

9. Metallic Iron