Temperature affects the flotation of quartz in the calcium/sodium oleate (NaOL) system, while there is a lack of understanding of its potential mechanism. Therefore, in this work, the flotation response of quartz to temperature was investigated via micro-flotation experiments, interface property analyses, and theoretical calculations. Flotation results demonstrated that increasing temperature contributed to higher flotation recovery of quartz, which enhanced the removal of quartz from hematite. Surface tension results revealed that higher temperatures lowered the critical micelle concentration (CMC) and surface tension of the NaOL solution, and thus enhanced its surface activity. Solution chemistry calculations and X-ray photoelectron spectroscopy (XPS) measurements confirmed that the increased content of Ca(OH)⁺ achieved by increasing temperatures enhanced the adsorption amounts of calcium species (acting as activation sites) on the quartz surface. Dynamic light scattering (DLS) measurements verified that the association degree of RCOO⁻ to form (RCOO)₂²⁻ was strengthened. Furthermore, adsorption density measurements and molecular dynamics (MD) simulations confirmed that increasing the temperature facilitated NaOL adsorption toward the surface of the quartz, which was attributed to the stronger interaction between NaOL and the calcium-activated quartz surface at higher temperatures. As a result, quartz flotation was improved by increasing temperatures. Accordingly, a possible adsorption model was proposed.

温度影响石英在油酸钙/钠 (NaOL) 体系中的浮选，而对其潜在机制缺乏了解。因此，在这项工作中，通过微浮选实验、界面特性分析和理论计算研究了石英对温度的浮选响应。浮选结果表明，升高温度有助于提高石英的浮选回收率，从而提高赤铁矿中石英的去除率。表面张力结果表明，较高的温度降低了 NaOL 溶液的临界胶束浓度 (CMC) 和表面张力，从而提高了其表面活性。溶液化学计算和 X 射线光电子能谱 (XPS) 测量证实 Ca(OH) ^{+含量增加}通过提高温度来提高石英表面上钙物质（作为活化位点）的吸附量。动态光散射 (DLS) 测量证实 RCOO ^-形成 (RCOO) ₂ ^2-的缔合度得到加强。此外，吸附密度测量和分子动力学 (MD) 模拟证实，升高温度有助于 NaOL 吸附到石英表面，这归因于 NaOL 与钙活化石英表面在较高温度下的相互作用更强。结果，石英浮选通过提高温度得到改善。因此，提出了一种可能的吸附模型。