By products

ArcelorMittal REACH OR has submitted, by November 30th 2010, a registration dossier to the European Chemical Agency (ECHA), on behalf of ArcelorMittal Zenica, for the following substances:

 

Substances on their own Registration number
Slags, ferrous metal, blast furnace (65996-69-2 / 266-002-0) 01-2119487456-25-****
Tar, coal, high temperature (65996-89-6 / 266-024-0) 01-2119511615-46-****
Ammonium sulphate (7783-20-2 / 231-894-1) 01-2119455044-46-****

Granulated blast furnace slag is obtained by rapid cooling of melted slag with suitable composition. Because it is acquired by melting iron ore in our blast furnace, it contains minimum two-thirds of massive slag and has hydraulic properties when properly activated.

The aggregate content of calcium oxide (CaO), magnesium oxide (MgO) and silica (SiO2) in the granulated blast furnace slag must contain at least two-thirds of the mass. The remainder contains aluminium oxide (Al2O3) along with small amounts of other compounds. The ratio of the mass (CaO+MgO)/(SiO2) must be greater than 1.0.

Crude coal tar is a by product of the coking process defined as a source of a great number of chemical compounds, including creosote, carbon pitch and chemical oils. The coking process represents heating of coal in coke ovens to drive volatile matter from it. Coal tar is extracted from the stream of gases evolved during the coking process. The by product can be used in several industrial branches such as:
– aluminium & steel industries; construction
– plastic & paint industries
– wood treating & carbon black industries

The coke oven by product ammonium sulfate is produced by reacting the ammonia recovered from coke oven offgas with sulfuric acid. Ammonium sulphate is an inorganic salt with a number of commercial uses. The primary use of ammonium sulfate is as a fertilizer for alkaline soils. In the soil the ammonium ion is released and forms a small amount of acid, lowering the pH balance of the soil, while contributing essential nitrogen for plant growth.