An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate. The process mineralogy analysis showed that the sulfur content reached 46.21%, and 81.97% of the sulfur existed as elemental sulfur which was the major mineral in the residue and primarily existed as pellet aggregate and biconical euhedral crystal. An elemental sulfur concentrate product with 99.9% of recovery and 83.46% of purity was obtained using the flotation process of one-time blank rougher, two-time agent-added roughers, and two-time cleaners with Z-200 as collector and Na₂S + ZnSO₄ + Na₂SO₃ as depressant. The flotation experiment using return water indicated that the cycle use of return water had no adverse effect on the flotation performance of elemental sulfur. The process mineralogy analysis manifested that main minerals in the residue directionally went into the flotation products. Most of elemental sulfur entered the concentrate while other minerals almost completely went into the tailing. Main valuable elements lead, zinc, and silver entered the tailing with sulfides and could be recovered by lead smelting. The proposed process can realize the comprehensive recovery of valuable components in the high-sulfur residue and thus it has wide industrial application prospect.

中文翻译：

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从硫化锌的加压酸浸残渣中选择性浮选元素硫

开发了一种有效的浮选工艺，以从硫化锌精矿的高硫压力酸浸残渣中选择性回收元素硫。过程矿物学分析表明，硫含量达到46.21％，其中硫的81.97％以元素硫的形式存在，是残余物中的主要矿物质，主要以粒料和双锥面体的形式存在。使用Z-200作为捕收剂和Na ₂的一次空白粗选器，两次添加试剂的粗选器和两次清洁剂的浮选工艺获得了具有99.9％的回收率和纯度83.46％的纯度的元素硫精矿产品。S + ZnSO ₄ + Na ₂ SO ₃作为抑郁症。使用回水的浮选实验表明，循环使用回水对元素硫的浮选性能没有不利影响。过程矿物学分析表明，残渣中的主要矿物质定向进入浮选产物。大部分元素硫进入精矿，而其他矿物质几乎完全进入尾矿。主要的有价值元素铅，锌和银与硫化物一起进入尾矿，可通过铅熔炼加以回收。该方法可实现高硫渣中有价值成分的综合回收，具有广阔的工业应用前景。