浙江某复杂多金属银铅锌矿石选矿试验

浙江某银铅锌多金属矿石铅、锌、银含量分别为1.10%、3.70%、84.50g/t,铅、锌主要以硫化铅、硫化锌形式存在,具有较高的开发利用价值。为充分回收矿石中的有价元素,采用优先浮选工艺进行了选矿试验。确定的最终工艺流程为1粗3精2扫选铅、1粗2精1扫选锌、1粗1精选硫,最终获得铅品位为46.40%、铅回收率为81.02%、含银3 300.00g/t、银回收率为75.17%的铅精矿,锌品位为48.00%、锌回收率为88.17%的锌精矿,以及硫品位为36.70%、硫回收率为50.98%的硫精矿。较充分地实现了矿石中有用矿物的回收。

伏牛山高硫铜锌矿选矿工艺研究

对伏牛山高硫铜锌矿石进行工艺矿物学和选矿工艺研究,研究表明,采用优先选铜—锌硫混合浮选再分离及铜锌硫依次优先浮选工艺可较好地回收矿石中的铜锌硫,优先选铜—锌硫混合浮选再分离流程得到含铜27.17%、铜回收率86.27%的铜精矿,含锌50.53%、锌回收率88.11%的锌精矿,含硫42.34%、硫回收率78.23%的硫精矿。选矿厂按此流程改造后,可产出含锌42.19%、锌回收率59.30%的锌精矿。

云南某铜铅锌多金属矿选矿试验研究

某矿样含铜0.933%,含铅1.326%,含锌2.346%,且含有大量的黄铁矿,属较难分选的低品位多金属矿石。通过试验,推荐使用:“部分混合-优先浮选”的流程。闭路试验获得了铜精矿含铜24.15%,铜回收率80.57%;铅精矿含铅31.63%,铅回收率65.35%;锌精矿含锌40.36%,锌回收率83.52%的较好指标。

Synergistic depression mechanism of zinc sulfate and sodium dimethyl dithiocarbamate on sphalerite in Pb−Zn flotation system

The depression mechanism of zinc sulfate(ZnSO4)and sodium dimethyl dithiocarbamate(DMDC)as the combined depressant on sphalerite was investigated by micro-flotation experiments,ion complexing tests,contact angle tests and X-ray photoelectron spectroscopy(XPS)analysis.The micro-flotation tests revealed that ZnSO4+DMDC had a better selective depression effect on sphalerite than using single ZnSO4 or DMDC.Ion complexing tests confirmed that DMDC had a strong complexing capacity with lead ions or hydroxy complexes.Contact angle tests illustrated that ZnSO4+DMDC makes the sphalerite surface more hydrophilic than ZnSO4 or DMDC.XPS analysis indicated that the combined depressant could prevent collector adsorbing on the Pb-activated sphalerite surface by a competitive adsorption method,while the combined depressant and collector were co-adsorbed on galena surface.