New utilizations of natural CuFeS2 as the raw material of Cu smelting for recovering Hg0 from Cu smelting flue gas
New utilizations of natural CuFeS2 as the raw material of Cu smelting for recovering Hg0 from Cu smelting flue gas
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天然CuFeS2作为铜冶炼原料从铜冶炼烟气中回收Hg0的新用途
DOI:
10.1016/j.fuel.2022.126997
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发表时间:
2022-12
期刊:
影响因子:
7.4
通讯作者:
Yang Shijian
中科院分区:
文献类型:
--
作者:
Ding Zhen;Yang Chen;Zhang Huan;Mei Jian;Wang Jian;Yang Shijian
Limits on Hg0emissions from Cu smelting flue gas (Cu-SFG) are stipulated severely by the Minamata Convention. In this work, acid-treated CuFeS2, derived from the simple acid treatment of natural CuFeS2as the raw material of Cu smelting, was developed as a reusable sorbent to recover Hg0in the Cu-SFG. Hg0capture by natural CuFeS2was closely related to the amounts of adsorption sites and active S22−. After acid treatment, not only the surface of natural CuFeS2became porous and roughened, but also some impurities in it were removed; hence, more adsorption sites for Hg0adsorption and more active S22−for oxidizing Hg0adsorbed were formed on acid-treated CuFeS2, causing its superior performance in capturing Hg0. Moreover, after acid treatment and Hg0capture, the property of natural CuFeS2for Cu smelting barely varied, implying that the spent acid-treated CuFeS2may be reused. Furthermore, most Hg0in the Cu-SFG can be recovered as liquid Hg using the condensers in Cu smelters. Therefore, Hg0recovery using acid-treated CuFeS2was an economically viable and eco-friendly method to control Hg0emissions from the Cu-SFG, double as a viable way to develop the new utilization of natural CuFeS2as the raw material of Cu smelting.
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