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Preventing acidification from mining

Often Pyrite oxidation of excavated overburden is the reason for Acid Mine Drainage (AMD). Mixing limestone reagents to the overburden is a solution to ensure that neutralising capacity is available exactly where acid is created.

Neutralac® C
direct use during the extraction process


Prevents the acidification from excavated overburden

- Neutralising capacity is available exactly where acid soil is created
- This process also prevents leaching of heavy metals

Case study: Lignite Mining in Western Germany
- Up to 140 Mm3 overburden excavated per year
- Mixing of Lhoist limestone powder onto belt conveyor provides needed neutralisation capacities
- AMD is effectively prevented

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