The manganese production industry produces a large amount of sulfide purification sludge (SPS) every year, representing a hazardous solid waste but also a valuable secondary resource for Ni, Co, and Mn. In this paper, the recovery of Ni, Co, and Mn from the SPS was achieved by (i) leaching with a solution of hydrogen peroxide, (ii) selectively extracting nickel, cobalt and manganese, (iii) solvent extraction for zinc removal, and finally obtained the battery-grade Ni-Co-Mn sulfate solution. During the hydrogen peroxide solution leaching stage, the leaching efficiency of Co, Mn, and Ni reached 98.5%, 98.6%, and 95.6%, respectively. A synergistic extraction system (SES) consisting of decyl 4-picolinate and dinonylnaphthalene sulfonic acid was used to selectively extract Ni, Co, and part of Mn, and the extraction of Ni and Co was >99.8% and 95.5%, respectively. The loaded organic was subjected to four-stage countercurrent scrubbing using a 5 g/L HSO solution, resulting in nearly 100% removal of Ca and Mg. After that, 150 g/L HSO was used to strip Ni, Co, and Mn from the loaded organic to obtain a crude Ni-Co-Mn sulfate solution. Finally, D2EHPA was utilized for the extraction of impurity Zn from the stripping solution to obtain a battery-grade Ni-Co-Mn sulfate solution with <5 × 10 g/L of Zn. Compared to traditional technology, the novel process not only enables the recovery of valuable Ni, Co, and Mn in SPS but also facilitates their direct preparation into battery-grade nickel‑cobalt‑manganese sulfate solution, which has the advantages of a short process and high added value.

中文翻译：

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从含锰镍钴硫化物的锰净化污泥（SPS）中回收有价金属并制备电池级镍钴锰硫酸盐溶液


锰生产行业每年产生大量的硫化物净化污泥（SPS），是一种危险的固体废物，但也是镍、钴和锰的宝贵二次资源。在本文中，通过（i）用过氧化氢溶液浸出，（ii）选择性萃取镍、钴和锰，（iii）溶剂萃取除锌，从 SPS 中回收镍、钴和锰，最终得到电池级镍钴锰硫酸盐溶液。双氧水浸出阶段，Co、Mn、Ni的浸出率分别达到98.5%、98.6%、95.6%。采用4-吡啶甲酸癸酯和二壬基萘磺酸组成的协同萃取体系（SES）选择性萃取Ni、Co和部分Mn，Ni和Co的萃取率分别>99.8%和95.5%。使用 5 g/L HSO 溶液对负载的有机物进行四级逆流洗涤，几乎 100% 去除 Ca 和 Mg。之后，使用 150 g/L HSO 从负载的有机物中反萃取 Ni、Co 和 Mn，得到粗 Ni-Co-Mn 硫酸盐溶液。最后，利用D2EHPA从反萃液中萃取杂质Zn，得到Zn含量<5×10g/L的电池级Ni-Co-Mn硫酸盐溶液。与传统技术相比，该新工艺不仅能够回收SPS中有价值的Ni、Co和Mn，而且有利于将其直接制备成电池级硫酸镍钴锰溶液，具有流程短、成本低等优点。高附加值。