REMOVAL OF IMPURITIES IN CRUDE COPPER BY Na2CO3 FLUX.

Takashi Nakamura, Fumio Noguchi, Yasuaki Ueda, Takeshi Kusakabe

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1 Citation (Scopus)

Abstract

Removal of impurities, V-groupe elements (As, Sb, Bi), oxygen and sulfur in crude copper during Na//2CO//3-treatment has been investigated in order to propose the new process of copper refining. The test were carried out by molten copper (15g) and the various compositions of Na//2CO//3-SiO//2 flux (5g) in an alumina crucible at 1150-1250 degree C in air and Ar. V-groupe elements, especially As, Sb, were rapidly removed from crude copper melts by Na//2CO//3-treatment. For example, the arsenic level in the copper dropped sharply from 1750 ppm to 150 ppm after 30 min. . The elimination of V-groupe elements increases with increasing the basicity of flux and lowering the temperature of treatment. On the other hand, the atmosphere of treatment seems to have little influence on the elimination of impurities in these tests.

Original languageEnglish
Pages (from-to)675-680
Number of pages6
JournalNihon Kogyokaishi
Volume100
Issue number1158
DOIs
Publication statusPublished - 1984 Jan 1

ASJC Scopus subject areas

  • Engineering(all)

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