WHAT IS SPONGE IRON AND HOW IS IT MADE?

2026-01-08

Sponge iron, also called direct reduced iron (DRI), is made from directly changing iron ore (in any form whatsoever) to iron by a cutback gas or carbon, produced from natural gas or coal. It is one of the many raw materials used in sponge iron.

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Specifications

Characteristic	Requirement
% Non-Magnetic	1.0 Max.
% Metallic Fe	81 Min.
% Total Fe	91 Min.
Metallization	88 Min.
%Phosphorous	0.07 Max.
% Sulphur	0.03 Max
% Carbon	0.1 Max.
% SiO2+ Al2O3	5 Max
Size	A-grade lumps 3-20 mm (-3 mm 5% Max.)
	A-grade fines 0-6 mm (+6 mm 5% Max.)

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