Copper telluride slag from copper smelting process is an important source of tellurium (Te). In this work, an efficient and economical hydrometallurgical process for extracting Te from copper telluride slag was proposed. First, H₂SO₄ and NaClO₃ were demonstrated to be effective for separating Te and Cu, and the leaching efficiency of Cu(II) reached 99.44 pct, while that of Te(IV) was only 3.00 pct. Tellurium oxide in the oxidative acid leaching residue was dissolved in NaOH solution, and Na₂S was added as precipitant to purify alkali leaching solution. Valuable metals (Bi, Se, Pb, Sb, Ag, Au) were enriched in alkaline leaching residue. Furthermore, the separation of Te and Se was realized by adding H₂O₂ in alkali leaching solution, the precipitation efficiency of Te(VI) was up to 99.43 pct. Finally, Te(VI) was reduced by Na₂S-Na₂SO₃, and the reduction efficiency was 99.85 pct under optimized conditions. The results show that 96.18 pct of Te can be extracted as elemental Te powder with a purity of 99.98 pct, indicating that the process achieves an efficient extraction efficiency of Te from copper telluride slag.

铜冶炼过程产生的碲化铜渣是碲（Te）的重要来源。在这项工作中，提出了一种从碲化铜渣中提取 Te 的高效经济的湿法冶金工艺。首先，H ₂ SO ₄和NaClO ₃被证明对Te和Cu的分离有效，Cu(II)的浸出率达到99.44%，而Te(IV)的浸出率仅为3.00%。将氧化酸浸渣中的氧化碲溶解在NaOH溶液中，加入Na ₂ S作为沉淀剂，对碱浸液进行净化。碱浸渣中富含贵金属（Bi、Se、Pb、Sb、Ag、Au）。_{此外，通过添加 H 2} O实现了 Te 和 Se 的分离₂在碱浸出溶液中，Te(VI) 的沉淀效率高达 99.43 pct。_{最后用Na 2} S-Na ₂ SO ₃对Te(VI)进行还原，在优化条件下还原效率为99.85%。结果表明，96.18%的碲可以作为元素碲粉提取，纯度为99.98%，表明该工艺实现了从碲化铜渣中高效提取碲的效率。