PyroGenesis Confirms Third-Party SEM Analysis Supports Pilot-Scale Fumed Silica Morphology Consistent with Commercial-Grade Fumed Silica

MONTREAL, July 28, 2025 (GLOBE NEWSWIRE) -- PyroGenesis Inc. (“PyroGenesis”) (http://pyrogenesis.com) (TSX: PYR) (OTCQX: PYRGF) (FRA: 8PY1), a high-tech company that designs, develops, manufactures and commercializes all-electric plasma processes and sustainable solutions to support heavy industry in their energy transition, emission reduction, commodity security, and waste remediation efforts, announces today that further to its news release dated July 8, 2025, and further to a recent press release from the Company’s client HPQ Silicon Inc. (“HPQ”), PyroGenesis confirms that third-party Scanning Electron Microscopy (SEM) analysis of Phase 1 Test #5 material from the Fumed Silica Reactor (FSR) further validates recently announced key technical metrics for fumed silica samples generated by the pilot scale plant.

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