Global aluminum industry generates millions of tons of hazardous waste annually—spent potlining (SPL), carbon cathodes, carbon-fluorine anodes, and secondary aluminum dross. Most ends up in landfills, wasting valuable fluoride, aluminum, carbon, and chlorides while posing serious environmental risks. BGRIMM's complete technology suite transforms these four waste streams into high-value materials through targeted high-temperature phase reconstruction.

Four waste types, four dedicated solutions

1. Silicon-aluminum based SPL – Directed high-temperature phase modulation completely decomposes toxic cyanides (meeting strictest regulatory standards) while recovering fluorides at >80% efficiency. Zero new waste discharge. Silicon-aluminum components converted into high-value building materials.

2. Carbon-based spent cathodes – Oxygen-isolated ultra-high temperature smelting breaks the tight carbon-fluoride intergrowth, enabling separate recovery of both carbon materials and fluoride salts for reuse.

3. Carbon-fluorine anode scrap – Controlled fluidized-bed combustion captures fluorine efficiently, enabling closed-loop fluoride salt recovery that can be returned directly to electrolytic cells—reducing consumption of strategic fluorspar reserves.

4. Aluminum-based secondary dross – Two-stage high-temperature phase reconstruction achieves >95% aluminum utilization, 95% chloride recovery, and 80% fluoride recovery. End product: high-value aluminum-magnesium based new materials.

Key performance summary

SPL → Cyanide fully decomposed; fluoride recovery ≥80%; zero discharge

Carbon-fluorine anode → Closed-loop fluoride recovery meeting plant reuse standards

Secondary dross → Al, Cl, F simultaneously recovered; direct conversion to industrial feedstock

Industrial deployment

Multiple projects are operating stably at leading global aluminum producers, with all environmental indicators consistently meeting regulatory requirements. The technology delivers both significant emission reduction benefits and attractive economic returns from resource recovery—turning yesterday's liability into today's asset.