关键词: 气体扩散度, 泡沫浮选, 流体动力学, 气泡尺寸, 气泡表面积通量

Abstract: In order to define and measure the flotation hydrodynamics key parameters precisely such as gas volume flow (Qg),superficial air flow rate ( Jg ),bubble size ( D32 ) and its distribution,bubble surface area flux ( Sb ) and gas holdup (εg),Chinalco Research Institute of Science and Technology (CRIST) develops the new generation of flotation hydrodynamic sensors system. The results showed the sensor system may model and analyze the collected data through multi-dimensional measurement of flotation equipment and the core parameters of flotation circuit,forms an optimization scheme and generates automatic operation instructions to promote the selection. The optimization and improvement of mining technology and economic indicators effectively fills the technical gap in the research and development of such equipment in the domestic mining field, creating favorable conditions for the realization of mineral processing industry 4. 0. The results of industrial application showed that the sensor system has the ability to accurately evaluate the operation efficiency of large flotation equipment,and can achieve the optimal solution of economic indicators such as metal recovery rate and concentrate grade in mine flotation process.

Key words: gas dispersion,frother flotation,hydrodynamics,bubble size,bubble surface area flux