杂质锌对顶吹炉铜熔炼系统的影响

鉴于杂质锌对顶吹炉生产中产品质量和生产率的不利影响，系统研究了入炉精矿中锌含量对铜熔炼顶吹炉系统冰铜、炉渣、烟尘的影响。结果表明，随着入炉精矿中锌的平均品位由0.88%上升至3.59%:冰铜中锌含量由0.68%上升至2.16%,不利于后续降低吹炼渣及精炼渣中铜含量；电炉渣中的锌含量由2.02%上升至5.80%,将导致更多的含锌铁尖晶石固相在高温下析出，使炉渣熔化温度出现升高趋势；上升烟道烟尘中锌含量增至3.34%,含锌物相增加将引入高熔点、高黏度锌铁尖晶石，诱发半熔融状或致密坚硬的结瘤物产生，难以破碎清除；电收尘系统烟尘率由0.96%提升至6.88%,烟尘中锌含量由4.25%增至8.44%,增加电收尘系统负担，降低除尘效率。

Influence of Impurity Zinc on Copper Smelting System in Top Blowing Furnace

In view of the adverse effects of zinc on product quality and productivity in top blown furnace, the effects of zinc content in concentrate on matte, slag and dust in copper top blown furnace system were systematically studied. The results show that the average grade of Zn in the furnace concentrate increases from 0.88% to 3.59%, the Zn content in matte increases from 0.68% to 2.16%, which is not conducive to the subsequent reduction of the Cu content in the blowing slag and refining slag. The increase of Zn content in electric furnace slag from 2.02% to 5.80% will lead to the precipitation of more Zn-containing Fe spinel solid phases at high temperatures, which will result in an increase tendency for the slag melting temperature. The Zn content in the uprising flue dust increases to 3.34%, and the increase of Zn-containing phase will lead to the introduction of Zn-Fe spinel with high melting point and high viscosity, which induces the formation of semi-molten or dense and hard nodules that are difficult to broken and removed. The dust efficiency of the electric dust collection system increases from 0.96% to 6.88%, and the Zn content in the dust increases from 4.25% to 8.44%, which will increase the burden of the electric dust collection system and reduce the dust removal efficiency.