Preparation and Key Performance Parameter Study of OCAA Biphasic Foam Dust Suppressant
The increased levels of mechanization and intelligence in mining have led to a growing prominence of dust pol-lution issues in mines.Foam dust suppression,widely adopted for its simplicity and high dust removal efficiency,is extensively applied in underground dust management.Foaming performance,stability performance,and wetting performance are key per-formance parameters that determine the effectiveness of foam dust suppressants.This study proposes and prepares a novel foam dust suppressant,OCAA,with strong comprehensive performance,and conducts research on its performance parameters and dust removal mechanism.Firstly,the foaming and stability performances of 13 typical surfactant monomers and their combina-tions were tested,and the monomer and combination with the best performance were selected.Then,three different foam stabi-lizers were chosen to improve the foam stability of the selected combination,determining the best foam stabilizer in the combi-nation and preparing a CAA solution.Subsequently,the wetting performance of the CAA solution was enhanced using a wetting agent,and by comparing the effectiveness of different wetting agents,the wetting agent component was determined as OT-45,re-sulting in the preparation of the OCAA biphasic foam dust suppressant.The study results indicate that when the ratio of AES∶modified APG∶CMMEA∶OT-45 is 5∶5∶3∶1,OCAA dust suppressant exhibits the best foaming performance,foam stability,and wetting performance.The microstructure of the OCAA dust suppressant was characterized by infrared spectroscopy.The varia-tion patterns of hydrophilic and hydrophobic functional groups on the coal surface before and after the action of the dust sup-pressant were investigated.By combining the molecular structure of the OCAA two-phase dust suppressant foam and the inter-action between coal molecules,the mutual combination mechanism of the OCAA dust suppressant and dust particles was re-vealed,thereby obtaining the reason for the increased hydrophilicity of the coal molecule surface.The study results further indi-cated that OCAA can improve the distribution of functional groups on the dust surface,increase the number of hydrophilic func-tional groups and reduce the number of hydrophobic functional groups,so as to improve the wettability.
万方数据
维普
