The smelting technology and flue dust treatment have an influence on the physical and chemical characteristics of flue dusts collected in copper smelting. We characterized flue dusts from a Bottom-Blowing Bath Smelting (BBS) process and from a Flash Smelting (FS) process by determining their comprehensive physical, chemical, and mineralogical characteristics. Annual flue dust generation data showed that the rate of the BBS process (2 to 3 pct) was clearly lower than that of FS process (5 to 6 pct). The results revealed that copper smelting flue dusts from the FS exhibited a larger entrainment of solids and a smaller particle size than the BBS. The crystallographic and chemical compositions of the samples indicated that the FS flue dusts have a higher degree of crystallinity than those of the BBS. Fe3O4, CuSO4 and PbSO4, Fe3O4, CuFe5O8 were the predominant crystalline phases in the FS and BBS flue dusts, respectively. In the FS and BBS flue dusts, amorphous multicomponent Cu-Zn-FeOx and Cu-Zn-S phases were formed, respectively. Mineralogical examinations and a stepwise chemical extraction confirmed that the majority of arsenic existed in amorphous form and mostly as pentavalent As5+ arsenate or As2O5 except that in BBS-ESPD.

中文翻译：

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底吹熔炼炉和闪速熔炼炉铜冶炼烟道粉尘的表征

冶炼工艺和烟尘处理对铜冶炼收集的烟尘的理化特性有影响。我们通过确定底吹熔炼 (BBS) 工艺和闪速熔炼 (FS) 工艺产生的烟道粉尘的综合物理、化学和矿物学特征来表征它们。每年的烟尘产生数据显示，BBS 工艺（2 至 3 pct）的速率明显低于 FS 工艺（5 至 6 pct）的速率。结果表明，与 BBS 相比，来自 FS 的铜冶炼烟道粉尘表现出更大的固体夹带和更小的粒径。样品的结晶和化学成分表明，FS 烟尘比 BBS 具有更高的结晶度。Fe3O4、CuSO4 和 PbSO4、Fe3O4、CuFe5O8 分别是 FS 和 BBS 烟道粉尘中的主要结晶相。在 FS 和 BBS 烟尘中，分别形成了非晶多组分 Cu-Zn-FeOx 和 Cu-Zn-S 相。矿物学检查和逐步化学提取证实，除了 BBS-ESPD 中的砷外，大部分砷以无定形形式存在，并且主要以五价 As5+ 砷酸盐或 As2O5 形式存在。