从竖罐炼锌蒸馏残渣旋涡炉处理烟化渣中浮选回收银

由于竖罐蒸馏炼锌工艺中锌精矿所含的银几乎全部进入蒸馏残渣,因此以蒸馏残渣经旋涡炉烟化处理后得到的烟化渣为原料,开展了浮选回收银的研究.浮选实验考查了浮选过程pH值、温度、捕收剂用量、起泡剂用量对粗选过程的影响.在优化的粗选工艺参数条件下进行了多级开路浮选和闭路浮选实验,最终确定采用一粗四精三扫工艺,捕收剂用量800g·t-1,起泡剂用量350g·t-1,获得银精矿品位6100g·t-1,银回收率8610%.     

磁铁矿与赤铁矿混合浮选交互影响规律

研究了浮选药剂对单矿物浮选的影响、磁铁矿对赤铁矿浮选的影响。单矿物浮选研究表明,pH〉10时,NaOH的用量的对石英矿的浮选影响大于磁铁矿、赤铁矿的浮选。随着淀粉用量的增加磁铁矿和赤铁矿的回收率逐渐增加,当淀粉用量为10mg／L时,赤铁矿的浮选几乎受到完全的抑制。CaO对磁铁矿、赤铁矿的浮选几乎没有影响,然而对石英的浮选确有很大的影响,石英的回收率随着CaO用量的增加逐渐降低。磁铁矿、赤铁矿以及石英的回收率随着捕收剂用量的增加逐渐降低。人工混合矿浮选研究表明,赤铁矿浮选品位随着磁铁矿含量的增加逐渐增加。     

锌浸出渣的还原焙烧和人工硫化矿物浮选过程中硫酸铅和硫酸锌的反应行为

To evaluate the feasibility of recovering Pb and Zn sulfides and Ag-containing minerals from Zn leaching residue by the process of reduction roasting followed by flotation, the reaction behaviors of Pb and Zn sulfates during this process were investigated. Chemical analysis showed that the transformation ratios of PbSO₄ and ZnSO₄ could reach 65.51% and 52.12%, respectively, after reduction roasting, and the introduction of a sulfidation agent could improve the transformation ratios of these sulfates. scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS) revealed that temperature obviously affects the particle size, crystal growth, and morphology of the artificial Pb and Zn sulfide minerals. Particle size analysis demonstrated that the particle size of the materials increases after roasting. Flotation tests revealed that a flotation concentrate composed of 12.01wt% Pb, 27.78wt% Zn, and 6.975 × 10?2wt% Ag with recoveries of 60.54%, 29.24%, and 57.64%, respectively, could be obtained after roasting.