Abstract:

In order to further improve the synergistic ability between magnetization and surfactant in improving the water wettability, the synergistic mechanism between magnetization and surfactant was studied and analyzed based on the experiments of the infrared spectrum, surface tension, contact angle, dust settling time and dust removal efficiency. The field application of 48712 fully mechanized mining face in Ximing Mine verified the synergistic dust removal performance between them. Results showed that the magnetization changed the solution properties by breaking hydrogen bonds between water molecules, making large molecular cluster structures be changed into small molecular groups, which improved the dust removal performance of the solution. Surfactant utilized its own hydrophilic and lipophilic groups to form an isolation layer on the solution surface, significantly reducing the surface tension. Additionally, by changing the adsorption mode of the surfactant on the solution surface under the effect of magnetization, the wettability of the surfactant solution could be further enhanced and the surfactant usage was reduced. The critical micelle concentration of the compound surfactant C decreased by 25% compared with the original solution under magnetization. In field application, the synergistic effect between magnetization and surfactant is obviously better than that of the single surfactant solution.

Key words: magnetization, surfactant, synergistic effect, water wettability, coal dust