What is Midrex process?

The MIDREX process produces direct reduced iron (hereinafter referred to as DRI). The process reduces iron ore using a reforming gas made from natural gas. The DRI is used mainly as the raw material for electric arc furnaces (EAFs), as a clean iron source substitute for scrap iron.

Which type of furnace is used in a Midrex process?

The MIDREX® Direct Reduction Process fueled by natural gas paired with an electric arc furnace (EAF) has the lowest CO² emissions of any commercially proven steelmaking route using virgin iron ore at 1.1 – 1.2 kg CO² / kg steel.

What is the main source of heat and reduction in Midrex process of sponge ironmaking?

Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.

What is SL RN process?

process is a widely used coal-based DRI-making process which uses a rotary kiln. The process uses lump ore, pellets, beach sand or ilmenite ore and solid carbon to produce hot or cold DRI.

What is DRI process?

The DRI production process involves the intimate mixing of prepared (sized) iron ore with a reductant, which is also generally used for heating of the ore bed to the temperature needed to achieve adequate reduction rates. The reductant can be a gas or a solid.

What is Fe m in sponge iron?

The quality of sponge iron is primarily ascertained by the percentage of metallization (removal of oxygen), which is the ratio of metallic iron to the total iron present in the product….

Elements	Sponge Iron Lumps	Sponge Iron Fines
Fe (T)	90 ± 2%	90 ± 2%
Mtz %	88± 2%	88± 2%
P	0.06%	0.06%
S	0.03%	0.04%

What is HyL process of sponge iron making?

The HyL process is a batch process in which rich, lump iron ore is reduced in a retort by hot, reformed natural gas. The gas enters the retort in a steady flow from the top of the reactor, passes through the ore bed, and then out the bottom of the vessel.

How is direct reduced iron produced?

Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal. Many ores are suitable for direct reduction.

What is SMS plant?

SMS plant, sponge iron along with pig iron and scrap in a predetermined ratio is charged in the furnace. The material gets melted at a temperature of 1500°C -1700°C. This hot metal is then tested for its chemical composition. The hot metal is then oxidised and then sent to the Continuous Billet casting plant.

What is C Fe ratio in sponge iron?

It is observed that the compressive strength is the maximum for the reduced pellets with the C/Fe2O3 molar ratio of 1.66 for all three layers and is around 3000 N/pellet.

Why is sponge iron called so?

In this natural reduction reaction, as the iron ore is heated with carbon, it results in a pop-marked surface, hence the name “sponge iron.” The commercial process is a solid solution reduction, also called direct-reduced iron (DRI).

What is HBI used for?

HBI (Hot Briquetted Iron) can be used as a scrap supplement in Electric Arc Furnaces allowing the production of most demanding steel grades. HBI is also used in Blast Furnaces to boost productivity and to reduce the coke consumption or in Blast Oxygen Furnaces as a low-residual substitute for scrap.