The partial roasting of high-arsenic copper concentrates at 973 K/998 K (700 °C/725 °C) under controlled atmosphere can remove > 95 pct of the arsenic contained in the concentrates, leaving a calcine with 52 to 68 wt pct bornite, 10 to 13 wt pct chalcopyrite and 2 to 5 wt pct magnetite, with 8 to 24 wt pct remnant chalcocite. The mineralogic composition of the calcine obtained is consistent with the calculated mineralogic composition based on the chemical analysis of the calcine and the gaseous phase in equilibrium with the calcine. The formation of the new solid phases present in the calcine (bornite and chalcopyrite) should take place in the emulsion phase of the fluidized bed, while the oxidation of part of the gaseous sulfur generated by thermal decomposition of the sulfides present in the concentrate could occur in the evolving cloud and wake surrounding the air bubbles in the emulsion phase of the fluidized bed.

中文翻译：

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高砷铜精矿的部分焙烧

在受控气氛下在 973 K/998 K (700 °C/725 °C) 下部分焙烧高砷铜精矿可以去除 > 95% 的精矿中的砷，留下 52 至 68 重量% 斑铜矿的煅烧, 10 至 13 重量％黄铜矿和 2 至 5 重量％磁铁矿，以及 8 至 24 重量％的残余辉铜矿。获得的煅烧物的矿物组成与基于煅烧物和与煅烧物平衡的气相的化学分析计算的矿物组成一致。煅烧物中存在的新固相（斑铜矿和黄铜矿）的形成应发生在流化床的乳液相中，