旋流-静态微泡浮选柱洗选金矿石的试验室研究

介绍了旋流—静态微泡浮选柱的结构和原理,并将其用于河南金渠金矿金矿石原矿和尾矿的浮选试验研究。结果表明,与常规浮选在试验条件基本相同的情况下进行对比,应用该设备可以获得较好的选矿指标,采用＂一粗一精一扫＂流程即可达到浮选目标,简化了流程,效益提高显著。     

某含碳铜钨锡多金属矿选矿试验研究

针对Cu品位0.91%、WO_3品位0.25%、Sn品位为0.21%的某含碳铜钨锡多金属矿,采用优先浮铜工艺流程,通过闭路试验获得了产率为3.22%,Cu品位为25.11%、Cu回收率为89.16%的铜精矿;浮铜尾矿采用浮选脱硫-重选-强磁分离工艺流程回收锡、钨矿物,获得了WO_3品位为46.05%、Sn含量为3.80%、WO_3回收率为42.46%的黑钨精矿和Sn品位为58.03%、WO_3含量为6.25%、Sn回收率为42.07%的非磁精矿。与现场生产指标相比,铜精矿Cu品位提高了8.11个百分点;WO_3综合回收率提高了5.49个百分点,Sn回收率提高了4.07个百分点。     

Porous silicon-based passivation and gettering in polycrystalline silicon solar cells

In this work, we report on the effect of introducing a superficial porous silicon (PS) layer on the electrical characteristics of polycrystalline silicon solar cells. The PS layer was formed using a vapour etching (VE)-based method. In addition to its known anti-reflecting action, the forming hydrogen-rich PS layer acts as a passivating agent for the surface of the cell. As a result we found an improvement of the I–V characteristics in dark conditions and AM1 illumination. We show that when the formation of a superficial PS layer is followed by a heat treatment, gettering of impurities from the polycrystalline silicon material is possible. After the removal of the PS layer and the formation of the photovoltaic (PV) structure, we observed an increase of the light-beam-induced-current (LBIC) for treatment temperatures not exceeding 900 °C. An improvement of the bulk minority carrier diffusion length and the grain boundary (GB) recombination velocity were observed as the temperature rises, although a global decrease of the LBIC current was observed for temperatures greater than 900 °C.     

青海某低品位铅锌矿床中伴生铜资源的综合回收工艺

针对青海某低品位铅锌矿床中的伴生铜资源,采用“铜铅混合浮选-铜铅分离”的工艺流程,铜铅混合浮选采用25号黑药做捕收剂,在弱碱介质下实现了铜铅矿物的高效同步富集,铜铅分离首先采用活性炭脱药,然后采用浮铜抑铅的工艺流程,选择羧甲基纤维素和水玻璃组合做铅矿物抑制剂,Z200做铜捕收剂,实现了铜铅浮选分离,最终在在原矿铜品位0.12%的情况下,获得了铜品位24.56%的铜精矿,铜总回收率达到了75.92%,实现了低品位铅锌矿床中伴生铜资源的高效利用。     

新型抑制剂在某铅锌硫混合精矿浮选分离中的应用

采用新型抑制剂X33和L3对云南某铅锌硫混合精矿进行浮选分离试验研究。结果表明该抑制剂替代传统抑制剂，能很好地分离铅锌硫混合精矿，其药剂工艺环保，用量低。含铅17.35%、锌6.76%和铁31.04%的铅锌硫混合精矿经过浮选分离后，可得到含铅64.59%、铅回收率95.49%、含银326.8 g/t、银回收率83.29%、含锌4.64%的铅精矿和含锌51.56%、锌回收率64.09%、含铅3.55%的锌精矿，以及含硫43.4%、硫回收率78.67%的硫精矿。      

大厂铜锌矿床成因初论

广西大厂锡矿黑水沟矿体赋矿层位中发现的中基性火山岩主要为玄武岩、安山岩类岩石,大都属于钙碱性-碱性系列。岩石地球化学特征表明该火山岩可能形成于裂谷环境。在大厂矿区,除了存在传统的燕山晚期花岗岩成矿作用外,至少还存在海西早期海底基性火山-沉积成矿作用和海底喷流热水-沉积成矿作用。