Skim Iron Slag

Steel & iron slag Skim Iron Slag

Skim Iron Slag

Processed Skim Iron Slag (EWC 19.12.02, B10 10) obtained during the de-sulphurisation process of pig iron.

We are proposing about 1,000 – 1,200 MT monthly, of iron slag derived from the skimming process of pig iron, occurred in the de-sulphurisation ladle. This material is an iron by-product that is encapsulated in varying levels of contaminants (S,Mg,Si). In order to enhance its usability, the material is processed and screened through various steps of dry screening, crushing and megnetic separations aimed at selecting the iron fractions from the slag.

Once this process is completed, we can obtain two different qualities: 

1.     >85% Fe Average – 600mm Max Fraction

2.     >78% Fe Average – 20-300mm Fraction

 

The level of Fe% in the stockpile has been estimated by water displacement test. 

Physical properties

At a visual inspection, it is formed by metallic lumps of various sizes

Chemical properties

It is a steel slag with high content of carbon that can be up to 4.0% as highlighted by the chemical analysis below:

Element

C

Si

Mn

Cr

Ni

Cu

Ti

Al

S

P

Sample 1

4.0

0.62

0.25

0.01

0.01

0.03

0.03

<0.01

0.11

0.08

Sample 2

4.1

0.54

0.25

<0.01

0.01

0.03

0.02

<0.01

0.04

0.09

 Tab.1. Average chemical composition. Please note that these data are believed to be accurate and representative of an average composition.

The metal analysis is expected to be consistent, however there is inconsistency in the level of slag attached across the varying size of metallic lumps. In some samples, there may be a lump of metal with low levels of slag, whereas in others it can be more a web of metal and slag within it.

Conversion of steel slag in valuable products

According to the contamination grade our iron skim can be primary recycled in metallurgical plants (R4).
The fines obtained can be utilized after soil improvement agents and aggregates.

 

 

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