Claim · draft · confidence 0.5

Generated from the Hyphae knowledge graph.

Statement: Raw bloom slag fraction (30–50% by mass) as a generalizable figure across furnace types

Needs verification (non-blocking)

Crew (1991) and others document high variability; no single published measurement spans all furnace traditions. Aligned with Bloomery Iron Smelting node CLM-08 (non-blocking). The claim is already qualified as an indicative range.

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