Mining Water Treatment

Acid mine drainage is formed when sulfide minerals — particularly pyrite (FeS₂) — are exposed to oxygen and water, producing sulfuric acid and mobilizing heavy metals including iron, manganese, aluminum, copper, zinc, and arsenic. AMD can have pH values as low as 2.0 and dissolved metal concentrations orders of magnitude above discharge limits.

Treatment typically involves lime or caustic neutralization, followed by coagulation, flocculation, clarification, and sludge management. Milton Roy metering pumps deliver precise, consistent dosing of lime slurry, caustic soda, ferric chloride, and polymer flocculants — even under the highly variable flow conditions and aggressive chemical environments typical of AMD treatment.

Mineral processing operations — including flotation, leaching, and solvent extraction — require precisely conditioned process water. pH control, collector and depressant dosing, and frother injection all demand accurate, repeatable chemical metering. Milton Roy pumps provide the ±1% dosing accuracy that mineral processing engineers require to optimize recovery rates and minimize reagent costs.

Modern mining operations are under increasing pressure to reduce freshwater consumption by recycling tailings supernatant and process water. Effective recycling requires treatment to remove residual reagents, suspended solids, and dissolved metals that would otherwise interfere with downstream processing or violate discharge standards.

Gold and silver extraction operations that use cyanide leaching must destroy residual cyanide in tailings water before discharge or recycling. Common detoxification methods include the INCO (SO₂/air) process, hydrogen peroxide oxidation, and alkaline chlorination — all requiring precise chemical dosing. Milton Roy metering pumps ensure accurate oxidant delivery for complete cyanide destruction while minimizing chemical waste.

Mine dewatering operations generate large volumes of water that must be treated before discharge. Treatment typically includes pH adjustment, metals precipitation, coagulation-flocculation, and disinfection. Milton Roy provides complete dosing solutions for every stage of dewatering water treatment.

The rapidly growing lithium mining sector relies on direct lithium extraction technologies that require precise chemical dosing for brine pre-treatment, pH adjustment, and impurity removal. Milton Roy's high-pressure metering pumps and engineered dosing packages support the demanding requirements of DLE operations — including handling corrosive brines, high-viscosity reagents, and extreme temperature conditions.