Abstract

In investigation of the aggregative stability of disperse systems by sediment volumetry, a violation of the structure of water in the contact area causes formation of nanobubbles, whose coalescence leads to appearance of hydrophobic attraction forces. A change in the aggregative stability of aqueous dispersions of particles can be interpreted in such a way that ingress of water molecules having a high potential of interaction with molecules of the medium in the interfacial gap between particle surfaces and outflow of water molecules exhibiting high intensity of interaction with a solid surface from the interfacial gap between particle surfaces is difficult. Excess osmotic pressure between hydrophilic surfaces leads to their hydrophilic repulsion, and excess osmotic pressure of the surrounding water (reduced osmotic pressure between surfaces) leads to hydrophobic attraction of the surfaces. To change the result of flotation, it is sufficient to bring a heat flow to a nanoscale-thick liquid layer, within which action of forces of structural origin is localized, determining the stability of wetting films. To increase the temperature in the interfacial gap between the particle and the bubble using the heat of water vapor condensation, as a gas for flotation, a mixture of air and hot water vapor is proposed. The developed flotation method has been tested in flotation of gold ores. The efficient steam flow rate determined from the results of a factorial experiment is 10.7 × 10^–3 kg/(s m²), with the xanthate flow rate being 1.74 g/t. In the rough flotation operation, the jet method of constructing a flowsheet is used, which provides for combination of the initial feed and rough concentrate. In comparison with flotation of ores according to a factory scheme, the yield of a concentrate sent to hydrometallurgical processing is smaller by 23.4 rel. %, with the achieved level of gold recovery remaining the same.

中文翻译：

---

润湿膜加热条件下浮选效率的实证

摘要

在通过沉积物体积法研究分散系统的聚集稳定性时，接触区域水结构的破坏导致纳米气泡的形成，纳米气泡的聚结导致疏水吸引力的出现。颗粒水性分散体的聚集稳定性的变化可以这样解释，即水分子进入颗粒表面之间的界面间隙与介质分子具有高相互作用潜力，水分子流出表现出高强度从颗粒表面之间的界面间隙与固体表面相互作用是困难的。亲水表面之间的过度渗透压导致它们的亲水排斥，周围水的渗透压过高（表面之间的渗透压降低）导致表面的疏水吸引力。为了改变浮选结果，将热流带到纳米级厚的液体层就足够了，在该液体层中，结构起源力的作用被局部化，从而决定了润湿膜的稳定性。为了利用水蒸气冷凝的热量提高颗粒和气泡之间的界面间隙的温度，作为浮选气体，提出了空气和热水蒸气的混合物。所开发的浮选方法已在金矿石的浮选中得到检验。根据析因实验的结果确定的有效蒸汽流量为 10.7 × 10 将热流带到纳米级厚的液体层就足够了，在该液体层中，结构起源力的作用被局部化，从而决定了润湿膜的稳定性。为了利用水蒸气冷凝的热量提高颗粒和气泡之间的界面间隙的温度，作为浮选气体，提出了空气和热水蒸气的混合物。所开发的浮选方法已在金矿石的浮选中得到检验。根据析因实验的结果确定的有效蒸汽流量为 10.7 × 10 将热流带到纳米级厚的液体层就足够了，在该液体层中，结构起源力的作用被局部化，从而决定了润湿膜的稳定性。为了利用水蒸气冷凝的热量提高颗粒和气泡之间的界面间隙的温度，作为浮选气体，提出了空气和热水蒸气的混合物。所开发的浮选方法已在金矿石的浮选中得到检验。根据析因实验的结果确定的有效蒸汽流量为 10.7 × 10 建议使用空气和热水蒸气的混合物。所开发的浮选方法已在金矿石的浮选中得到检验。根据析因实验的结果确定的有效蒸汽流量为 10.7 × 10 建议使用空气和热水蒸气的混合物。所开发的浮选方法已在金矿石的浮选中得到检验。根据析因实验的结果确定的有效蒸汽流量为 10.7 × 10^–3 kg/(sm ² )，黄药流量为1.74 g/t。在粗浮选操作中，采用射流法构建工艺流程，提供初始进料与粗精矿的结合。与根据工厂方案进行的矿石浮选相比，送往湿法冶金处理的精矿产量要小 23.4 rel。%，达到的黄金回收水平保持不变。