从某金精矿中回收金银铜铅锌的试验研究

山西某复杂多金属硫化矿石采用混合浮选获得的金精矿含Au34.22g/t、Ag904.4g/t、Pb8.78%、Cu1.32%、Zn3.35%,混合精矿直接外销,但其铜、铅、锌基本不予计价,造成了有价金属的流失。采用浮选精矿氰化浸金—氰化渣铅、铜、锌依次优先浮选流程,获得金总回收率96.60%、银95.51%、铅85.39%、铜72.37%、锌83.51%,实现了高效综合回收该矿石中的有价元素,经济效益和社会效益显著。     

甘肃某银多金属矿浮选工艺研究

通过对甘肃省某复杂难处理银多金属氧化矿的选矿试验研究,确定了适宜该矿的选矿工艺流程为优先浮选。该矿采用D-421捕收剂、Z-205高效复合起泡剂优先浮选金银精矿;而后采用硫化钠、D-421和Z-205浮选得到铅精矿。本次试验大幅度提高了金、银回收率。生产实践结果表明工艺条件合理,指标稳定可靠。     

Controlled synthesis of Mn3O4/Co9S8–Ni3S2 on nickel foam as efficient electrocatalyst for oxygen evolution reaction

Advances in electrochemical interfaces have greatly facilitated the development of new energy systems that can replace traditional fossil fuels. Oxygen evolution reaction (OER) is the core reaction in the new energy conversion system to produce hydrogen. Here, nanorods structure of Mn₃O₄/Co₉S₈–Ni₃S₂/NF-4 was designed and assembled. The Mn₃O₄ has served as an appropriate matrix to build a composite structure with Co₉S₈–Ni₃S₂ to enhance the stability of catalyst. And the introduction of Mn regulated the electronic structure of Ni and Co, which increased the OER activity of matericals. Further characterization and electrochemical testing have suggested that between polymetallic can effectively optimize conductivity and enhance reaction kinetics. Mn₃O₄/Co₉S₈–Ni₃S₂/NF-4 can achieve overpotential of 188 mV at the current density of 10 mA cm^?2 in alkaline solution, with small Tafel slope of 43.2 mV dec^?1 and satisfactory stability of 30 h at 10 mA cm^?2. This work may show a feasible reference in the design of high-efficient OER catalysts.     

某复杂铜铅锌多金属硫化矿选矿试验研究

某复杂铜铅锌多金属硫化矿,以黄铜矿、方铅矿和铁闪锌矿为主要的铜矿物、铅矿物和锌矿物。为有效回收其中的铜、铅、锌金属及伴生的金、银,开展了矿石工艺矿物学研究和选矿试验研究。结果表明,采用“铜铅混浮再分离-锌浮选”的工艺流程,可获得铜品位为19.05%、铜回收率为74.99%的铜精矿；铅品位为69.03%、铅回收率为75.03%的铅精矿；锌品位为47.87%、锌回收率为72.94%的锌精矿。以及金、银总回收率分别为75.45%和76.86%的工艺指标。     

某铜铅浮选尾矿中锌及伴生组分的综合回收试验研究北大核心

针对某铜铅浮选尾矿含有金银锌硫等有价组分,可综合回收利用。但由于矿石中锌含量较低,主要以铁闪锌矿形式存在,同时硫含量较高,因此难以获得品质较好的锌精矿,导致产品销售价格较低,选矿经济效益得不到有效发挥。为增加企业经济效益,对该尾矿进行了选矿试验,旨在对矿石中的低品位锌进行有效回收,同时回收矿石中的伴生组分金银,为选厂进行生产改造提供技术依据。铜铅尾矿锌品位为0.39%,金银含量分别为0.77、10.15 g/t,试验采用锌硫混选—锌硫分离工艺,通过添加含锌矿物的新型环保活化剂X-46和硫铁矿的选择性抑制剂BK526,在最佳的工艺条件下,闭路试验获得了锌精矿锌品位为46.27%、锌作业回收率为80.35%,含金8.24 g/t、含银103 g/t;硫精矿硫品位为46.54%、硫作业回收率为87.63%,含金3.00 g/t、含银29.80 g/t的理想指标。伴生组分金银在锌、硫精矿中得到了有效富集。