Effective recovery of chalcopyrite at low temperatures using modified ester collector

The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments.

锡铁山深部铅锌矿石高效分选与综合回收新工艺

锡铁山铅锌矿10中段以下矿石中矿物种类多样，可综合回收的元素为铅、锌、硫以及伴生金、银，为高效综合回收有价金属资源，对该矿石进行了选矿新工艺试验研究。在“优先浮铅-锌硫混浮-锌硫分离”的流程结构以及磨矿细度-74μm占60％的条件下，铅浮选回路选择自然pH介质，添加XKY-01作锌硫抑制剂，采用金银高效辅助捕收剂LP-12配合25#黑药共同作为铅矿物捕收剂，强化对金银矿物的捕收；对浮铅尾矿，调节矿浆pH至9．5左右，以（XKH-01＋CuSO4）为锌硫混浮活化剂，丁基黄药为捕收剂；对锌硫混合粗精矿，通过石灰调控浮选矿浆电位至锌硫分离电位区间，使两者有效分离。闭路试验可获得含铅72．73％、含金3．06g·t-1、含银994g·t-1，铅回收率93．40％、金回收率31．21％、银回收率82．68％的铅精矿；含锌49．17％，锌回收率93．23％的锌精矿；含硫49．98％，硫回收率75．36％的硫精矿。相比现场生产工艺，在深部矿石铅、金、银品位下降的情况下，新工艺有效地稳定且提高了主金属铅、锌的选别指标，并改善了贵金属金银的回收效果。