Selective Flotation of Elemental Sulfur from Pressure Acid Leaching Residue of Zinc Sulfide

Minerals

Bangsheng Zhang¹  Fang Wang¹  Fan Zhang¹  Guiqing Liu²  Kaixi Jiang²  Tao Jiang³  Zhonglin Dong³  Bin Xu³ 

[1] Jiangsu BGRIMM Metal Recycling Science & Technology Co. Ltd, Xuzhou 221000, China;School of Metallurgy, Northeastern University, Shenyang 110000, China;School of Minerals Processing and Bioengineering, Central South University, Changsha 410000, China;

关键词: high-sulfur zinc residue;    elemental sulfur;    process mineralogy;    selective flotation;    cycle use of return water;   

DOI  :  10.3390/min11010089

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown