STP831: Characterization of High-Purity Cathodes for Plant Control and Marketing Purposes

    Hunter, TC
    Technical Services Manager and Chief Chemist, Copper Refineries Pty. Ltd., Townsville, Queensland

    Mitchell, RJ
    Technical Services Manager and Chief Chemist, Copper Refineries Pty. Ltd., Townsville, Queensland

    Pages: 30    Published: Jan 1984


    Abstract

    The distribution of some key impurities in high-purity copper cathode was found to be significantly biased towards edges of the cathodes. It is therefore necessary that the laboratory sampling technique applied to primary sampled cathodes proportionately contain edge materials. Even with high-purity cathode lots, variation within and between cathodes in the lot is large; thus sampling accuracy requires that both primary sampling frequency and the laboratory sampled portion of whole cathodes be relatively high compared with most other metallic materials. There appears to be no low-frequency simple sampling procedure that is a reliable in-plant indicator of general quality.

    Keywords:

    copper cathodes, sampling reliability, impurity distribution, high purity


    Paper ID: STP32537S

    Committee/Subcommittee: B02.09

    DOI: 10.1520/STP32537S


    CrossRef ASTM International is a member of CrossRef.