Humic acid (HA), as an environmentally friendly depressant, absorbed significant attention for possible cleaner production within mineral separation by selective separation, especially for reverse flotation of iron oxides. However, a few systematic studies were addressed its effect on the iron ore reverse cationic flotation in the presence of complex silicates and its adsorption mechanism on the surface of these minerals. This work is going to fill this gap by exploring the depression mechanisms of HA through the reverse cationic flotation (separation of hematite from complex silicates; augite and hornblende). Wettability analyses, micro and batch flotation scale tests were employed for such a purpose. Adsorption test, turbidity measurement, zeta potential measurement, and Fourier Transform Infrared (FTIR) analyses were conducted to understand HA adsorption's mechanism on these minerals' surface. Results relieved that at the low concentration of HA (20 mg/L), adsorption on the examined minerals' surface occurred. Based on the micro-flotation test results, HA's depression impact has the following order: hematite ≫ augite > hornblende. The surface analysis results suggested that HA can interact with the Fe ions on the hematite surface by chemical and hydrogen bonding. The same mechanism was observed for HA adsorption on the considered silicates; however, the adsorption rate was lower, while lower polyvalent cations are available on these silicates' surface.

腐殖酸（HA）作为一种环保型抑制剂，在通过选择性分离进行矿物分离中可能进行更清洁生产方面引起了极大的关注，特别是对于氧化铁的逆浮选。然而，一些系统的研究解决了其在复杂硅酸盐存在下对铁矿石反阳离子浮选的影响及其在这些矿物表面的吸附机理。这项工作将通过反向阳离子浮选（将赤铁矿与复杂的硅酸盐；闪铁矿和角闪石分离）探索HA的降低机理来填补这一空白。为此目的进行了润湿性分析，微量和批量浮选试验。吸附测试，浊度测量，ζ电势测量，进行了傅里叶变换红外（FTIR）分析，以了解HA在这些矿物表面上的吸附机理。结果缓解了，在低浓度的HA（20 mg / L）下，被检矿物表面发生了吸附。根据微浮选测试结果，医管局对抑郁症的影响具有以下顺序：赤铁矿≫闪铁矿>角闪石。表面分析结果表明，HA可以通过化学键和氢键与赤铁矿表面的Fe离子相互作用。对于所考虑的硅酸盐，HA的吸附机理相同。但是，吸附速率较低，而这些硅酸盐的表面上有较低的多价阳离子。在被检查的矿物表面发生吸附。根据微浮选测试结果，医管局对抑郁症的影响具有以下顺序：赤铁矿≫闪铁矿>角闪石。表面分析结果表明，HA可以通过化学键和氢键与赤铁矿表面的Fe离子相互作用。对于所考虑的硅酸盐，HA的吸附机理相同。但是，吸附速率较低，而这些硅酸盐的表面上有较低的多价阳离子。在被检查的矿物表面发生吸附。根据微浮选测试结果，医管局对抑郁症的影响具有以下顺序：赤铁矿≫闪铁矿>角闪石。表面分析结果表明，HA可以通过化学键和氢键与赤铁矿表面的Fe离子相互作用。对于所考虑的硅酸盐，HA的吸附机理相同。但是，吸附速率较低，而这些硅酸盐的表面上有较低的多价阳离子。对于所考虑的硅酸盐，HA的吸附机理相同。但是，吸附速率较低，而这些硅酸盐的表面上有较低的多价阳离子。对于所考虑的硅酸盐，HA的吸附机理相同。但是，吸附速率较低，而这些硅酸盐的表面上有较低的多价阳离子。