Moisture Deduction Protocols and Mechanical Splitting Variance in Heavy Scrap
Enforce mechanical split-sample oven drying under ISO 14284 to eliminate water weight overpayment and protect inventory borrowing base covenants.
Heavy Scrap
Meaning
Dense steel recycling stock that possesses a thickness of at least one-quarter of an inch and is sized to fit directly into steelmaking furnaces. This material offers high yield and predictable melting characteristics, which makes it a preferred feedstock for electric arc furnace steelmaking. Clean heavy scrap must be free of excessive rust, dirt, or non-metallic attachments to avoid contamination of the liquid metal.
Furnace Performance
High density feedstock reduces the number of bucket charges required to fill the steelmaking furnace. This operational speed maximizes melt shop throughput by shortening the tap-to-tap time of each heating cycle.
Preparation Processing
Scrap yards utilize large hydraulic shears or oxygen torches to reduce structural beams and heavy plates to standard dimensions. Sizing limits are strictly enforced because oversized metal can lodge in the furnace shell or damage the electrodes during melting. The resulting heavy scrap must undergo radiation screening before delivery to prevent hazardous source contamination.
Processors who deliver consistent dimensions command premium prices due to the reduced risk of mechanical jamming during charging.
Yield Control
Impurity levels are monitored through melt chemistry analysis rather than visual inspection alone. Early charging of low-grade material can elevate phosphorus levels, which increases the required volume of slag-forming additives. Refiners use this grade as a thermal ballast to manage temperature fluctuations in the liquid steel bath.