Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 35    No. 9    September 2025

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Effect of antimony and arsenic on gold enhancement capture during iron matte smelting of refractory gold concentrate by exclusion method
Bai-qi SUN1, Wei-feng LIU1,2, Du-chao ZHANG1,2, Lin CHEN1,2, Xu-heng LIU1,2, Tian-zu YANG1

1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. National Engineering Research Center of Low-carbon Nonferrous Metallurgy, Central South University, Changsha 410083, China

Abstract:Based on the properties of antimony (Sb) and arsenic (As), a method was proposed to enhance gold recovery during iron matte smelting. The impact of Sb and As on gold enhancement capture was investigated using an exclusion method. The results demonstrated that both Sb and As significantly improved the gold recovery rate. As the Sb or As content increased, the gold recovery rate increased. The enhancement effect of Sb was better than that of As, and the optimal results were achieved through the synergistic effects of Sb and As. Under optimized conditions, the gold recovery rate reached 97.12%, whereas the gold content in the slag decreased to 1.70 g/t. Sb captured and aggregated free gold as an Au-Sb alloy, whereas As-Fe alloy also captured free gold. The growth of the gold-captured phase size enhanced the settling velocity, thereby promoting gold recovery.

 

Key words: refractory gold concentrate; Au-Sb alloy; As-Fe alloy; enhancement effect; iron matte; capture gold

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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