To investigate the factors affecting the wettability of copper mine blasting dust, the primary blasting dust was collected from an open-pit copper mine and separated into hydrophilic blasting dust (HLBD) and hydrophobic blasting dust (HBBD) using water flotation method. The physicochemical properties of HLBD and HBBD were measured and compared with each other. The properties included particle size distributions (PSDs), micromorphologies, pore structures, mineral components and surface organic carbon functional groups. The results show that particle size and pore structure of the blasting dust are the main factors affecting its wettability. Specifically, particle size of HBBD is smaller than that of HLBD, and their respiratory dust (less than 10 µm) accounts for 61.74 vol% and 53.00 vol%, respectively. The pore structure of HBBD is more developed, and the total pore volume of HBBD is 1.66 times larger than that of HLBD. The identical mineral compositions were detected in HLBD and HBBD by X-rays diffraction (XRD); however, the surface organic hydrophobic component of HBBD is slightly larger than that of HLBD, this may be the reason for the poor wettability of HBBD. This study is significant to understand the effects of physicochemical properties of copper mine blasting dust on its wettability.

为了研究影响铜矿爆破粉尘润湿性的因素，从露天铜矿收集一次爆破粉尘，并采用水浮法将其分为亲水性爆破粉尘（HLBD）和疏水性爆破粉尘（HBBD）。测量并比较了HLBD和HBBD的理化性质。这些性质包括粒径分布（PSD），微观形貌，孔结构，矿物成分和表面有机碳官能团。结果表明，喷砂粉尘的粒径和孔结构是影响其润湿性的主要因素。具体地说，HBBD的粒径小于HLBD，其呼吸粉尘（小于10 µm）分别占61.74％（体积）和53.00％（体积）。HBBD的孔结构更发达，HBBD的总孔容是HLBD的1.66倍。通过X射线衍射（XRD）在HLBD和HBBD中检测到相同的矿物成分；但是，HBBD的表面有机疏水性成分比HLBD的略大，这可能是HBBD润湿性差的原因。这项研究对于了解铜矿爆破粉尘的物理化学性质对其润湿性的影响具有重要意义。