Synthesis and application of acyl quaternary ammonium salt desilication collector
Using dodecanoyl chloride,dimethylaminopropylamine,and bromoethane as starting materials,a highly efficient acyl quaternary ammonium salt,i.e.collector XN-12 that can selectively float and remove silica under under acidic pulp conditions was synthesized.Flotation results show that in single quartz mineral flotation experiments,XN-12 has good flotation performance on quartz under conditions of mineral slurry with pH＞5;when directly subjected to single reverse flotation desilication using XN-12 for high-silica phosphate ore,under acidic mineral slurry conditions at pH = 5.6,with a dosage of 5.0 kg/t of sodium tripolyphosphate depressant and 1.2 kg/t of XN-12,the obtained phosphorus concentrate had good indicators of P2O5 grade 30.31%,recovery rate 81.60%,SiO2 grade 7.26%,and desilication rate 69.12%.
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