Based on the working principles of particle bed comminution, particles produced by high-pressure grinding rolls (HPGR) have surface properties different from particles produced by other grinding patterns, which exert great influence on mineral flotation. Flotation performances of calcite particles under different grinding patterns involving the use of HPGR, a jaw crusher, a dry ball mill, a wet ball mill, and a wet rod mill were studied using single mineral flotation tests. The surface properties of the particles under different grinding patterns were characterized to determine the flotation performance variation in terms of specific surface area, particle size distribution, AFM, XPS, and zeta potential. The results show that particles ground by HPGR exhibited improved flotation performance within the lower range of grinding fineness in both NaOL and dodecyl amine flotation systems compared to the particles prepared using other grinding patterns. Specific surface area, particle size distribution, surface roughness, Fe(Ⅲ) contamination, binding energy, and zeta potential are greatly influenced by grinding patterns, which is the main cause of the flotation performance variation.%基于料层粉碎工作方式,高压辊磨制备的矿物颗粒具有区别于其他磨矿方式制备颗粒的表面特性,对矿物浮选会产生较大的影响.本文研究了高压辊磨、颚式破碎、干式球磨、湿式球磨及湿式棒磨下方解石纯矿物颗粒的浮选行为,并通过比表面积、粒径分布、原子力学显微镜、表面电子能谱及动电位等手段表征了不同磨矿方式制备颗粒的表面特性以揭示其浮选机理.结果表明:当磨矿细度较低时,相比于其他磨矿方式高压辊磨制备的方解石颗粒在油酸钠和十二胺体系均能够获得更好的浮选指标;由磨矿方式导致的矿物颗粒比表面积、粒度分布、表面粗糙度、Fe3+沾染物、键合能及Zeta电位差异是其浮选行为差异化的主要原因.
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