What quality control measures are implemented in tin ingot production?
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Raw Material Control: Use high-purity electrolytic tin (Sn ≥ 99.95%) or refined tin concentrates, with impurity checks (e.g., As, Sb). - •
Melting Process: - •
Oxidation-reduction control (prevents Sn loss). - •
Vacuum or inert gas protection (reduces gas inclusions).
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Casting Standards: - •
Mold temperature control (minimizes shrinkage defects). - •
Optimized cooling rate (enhances uniform crystallization).
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Final Inspection: Batch sampling for chemical composition, dimensions, and appearance; quality certificates (CoC) retained.