细粒白云石疏水聚团的原位研究

采用聚焦光束反射测量仪和颗粒录影显微镜原位观测了-30μm细粒白云石在脂肪酸类药剂GJBW以及煤油诱导下的疏水聚团尺寸和形貌,考察了GJBW浓度、煤油用量、油滴粒度、pH值和搅拌速度的影响。结果表明,GJBW诱导形成了疏松的支链结构聚团,微米级油滴能显著增大聚团尺寸和强度,形成较紧密的球形结构聚团。搅拌速度较高时聚团有所破坏,但当搅拌速度降低时,聚团可以重构。原位表征能更准确地揭示细颗粒的疏水聚团过程。

In-situ Investigation of Hydrophobic Agglomeration of Fine Dolomite

The hydrophobic agglomeration of fine dolomite particles (-30 μm) induced by fatty acids agent GJBW and kerosene were investigated. The size and morphology of the aggregates were in-situ observed with focused beam reflectance measurement and real-time particle vision and measurement methods. The effects of GJBW dosage, kerosene dosage, kerosene droplet size, pulp pH value and stirring speed were studied. It is found that the induction of GJBW can result in the formation of loose branched-chain structured aggregates, and then kerosene droplets of micron-scale can greatly increase the size and strength of aggregates, which results in the aggregates being of compact and spherical shape. The aggregates will be disintegrated at an increased stirring speed, but can be reconstructed as the speed is slowing down. The in-situ characterization techniques can be utilized to precisely reveal the hydrophobic agglomeration process of fine particles.