某复杂硫化铜矿铜硫分离试验研究

某复杂硫化铜矿矿石性质复杂,铜矿物种类繁杂,矿物结构构造也复杂多样,且含铜品位较低。在工艺矿物学研究的基础上,使用适合该矿石性质、对各种铜矿物均具有较强选择性和捕收能力的高效捕收剂LP-01,采用分步优先浮选和中矿再磨再选的浮选工艺,实现了该复杂硫化铜矿铜硫的低碱高效分离,经二粗、一精、中矿再磨精选流程获得了铜品位18.43%、回收率87.54%的铜精矿,分离效果明显。

低金高硫铜矿石回收金选矿试验研究

铜硫矿中低品位伴生金由于难富集到计价品位而常被忽略回收。针对含铜1.84%、含硫11.09%、含金0.12×10-6的低金高硫铜矿石,采用P10作为选铜金捕收剂,H2SO4作为选硫活化剂,丁黄作为选硫捕收剂,在低碱条件下,闭路试验可获得含铜20.98%、铜回收率为86.23%,含金1.2×10-6、金回收率为74.80%的铜金精矿及硫品位为48.9%、硫回收率为74.47%的合格硫精矿,实现了铜、硫、金的高效综合回收。低碱度铜硫分离工艺使活化剂用量大为减少,有利于硫的综合回收,降低了选矿成本。

某高硫铜矿石的低碱铜硫分离试验研究

在对某高硫铜矿石进行工艺矿物学研究的基础上,采用铜硫混合浮选—混合粗精矿再磨—铜硫分离的流程,以DT-4号代替部分石灰为抑制剂进行铜硫分离。结果表明,在原矿含铜0.18%,硫7.43%的条件下,最终可获得含铜为23.48%、含硫为28.71%、铜回收率为86.09%的铜精矿和含硫为47.69%、含铜为0.072%、硫回收率为74.58%的硫精矿,实现了铜硫在较低碱度下的有效分离。

某复杂铜硫矿石优先浮选工艺试验研究

对某铜硫硫化矿石进行详细的工艺矿物学研究,针对该矿石特点,采用"优先选铜—活化选硫"原则流程,试验对比了以丁基黄药和酯-105为铜捕收剂的选别效果,结果表明:与前者相比,以酯-105作铜捕收剂,可减少选铜阶段的石灰用量,且在选硫阶段可用新型活化剂代替硫酸,从而实现低碱优先选铜,新型活化剂活化选硫,实验室闭路试验结果表明,该工艺可获得铜品位为18.93%,铜回收率为94.31%的铜精矿;硫品位为33.46%,硫回收率为55.39%的硫精矿.

Interaction mechanism of ferrate(Ⅵ) with arsenopyrite surface and its effect on flotation separation of chalcopyrite from arsenopyrite

Potassium ferrate(K_(2)FeO_(4)) was used as a novel environmental-friendly depressant,and its inhibition effect on flotation performance of arsenopyrite and chalcopyrite using potassium ethyl xanthate(PEX)as a collector was investigated by flotation experiments,contact angle measurements,adsorption measurements,localized electrochemical impedance spectroscopy(LEIS)measurements,and X-ray photoelectron spectroscopy(XPS)analyses.The results showed that K_(2)FeO_(4)strongly depressed arsenopyrite in a pH range of 4−11,and the flotation separation of chalcopyrite from arsenopyrite could be realized in the presence of 5×10^(−4)mol/L K_(2)FeO_(4)and 5×10^(−5)mol/L PEX at pH 8 or 10.In the presence of K_(2)FeO_(4) and PEX,the contact angle and the xanthate adsorption capacity of arsenopyrite decreased significantly.LEIS measurements showed that the addition of ferrate could significantly increase the impedance of the arsenopyrite surface.XPS analyses further confirmed that ferrate accelerated the oxidation of arsenopyrite surface.