全泥氰化尾矿压滤洗涤脱氰研究

Pressure Filtration and Cake Washing for Cyanide Removal from All-slime Cyanidation Tailing

氰化提金工艺产出大量的氰化尾矿,在最终处置前需对其进行脱氰处理。针对全泥氰化工艺产出的尾矿浆,开展了压滤洗涤工艺研究,考察了洗涤比对氰渣滤饼置换洗涤效果的影响。实验室小型试验研究结果表明,洗涤比小于2~3时,洗涤效率随洗涤比大致呈线性增长趋势,当洗涤比超过3后,继续增大洗涤比对洗涤效果改善非常有限。工业规模试验结果也验证了对氰渣滤饼进行置换洗涤时存在适宜的洗涤比范围。

Large quantities of cyanide-containing tailings produced in cyanidation processes need to be de-cyanided prior to final disposal.Effects of washing ratio on efficiency of replacement washing of cyanide tailing pressure-filtering cake produced by all-slime cyanidation process were investigated.The results of small-scale laboratory tests show that washing efficiency rises approximately linearly with washing ratio within 2—3.Rising washing ratio beyond three results very limited impact on washing performance.Industrialscale tests confirm that there is a suitable range for selecting of washing ratio to compromise cyanide washing efficiency and facility utilization.