【摘要】 在锌焙烧烟尘热酸浸出过程中,来自于铁酸锌溶解的三价铁离子被用作焙烧烟尘中ZnS浸出的氧化剂.为了提高锌的浸出率,研究了在浸出过程中加入锌电解阳极泥对ZnS浸出的影响.考察的浸出条件包括阳极泥加入量、温度、硫酸浓度和反应时间.试验结果表明,阳极泥中的MnO2有助于焙烧烟尘中ZnS的氧化浸出.在最佳的条件下,通过加入阳极泥(锰加入量为焙烧烟尘质量的4%)可将锌的浸出率由94%提高到97%以上.更多还原

【Abstract】 In the hot-acid leaching process of roasted zinc dust,the ferric ion obtained from ZnFe₂O₄ dissolution was used as oxidant to leach ZnS contained in the roasted dust.To improve the leaching efficiency,the effect of adding anode mud obtained from zinc electrowinning on zinc leaching was investigated,of which the leaching conditions including dose of anode mud,temperature,H₂SO₄ concentration and reaction time were tested.The results indicated that MnO₂ in the anode mud is favorable to the oxidation leaching of ZnS in roasted dust.The leaching efficiency of zinc will therefore increase from 94% to 97% if the Mn dose is 4% of roasted dust in anode mud under optimum conditions.更多还原