Considering the serious impact of fluorine-containing wastewater on the environment, "fluorine-free acid floating washing method" appeared in the 1970s. For example, in the separation of feldspar and quartz, sulfuric acid or hydrochloric acid (PH=2) slurry is adopted, and advanced aliphatic amine salt and petroleum sodium sulfonate mixed collector flotation is successful. PTMS WET High Intensity Magnetic Separator can remove iron (FE2O3) inside.
In recent years, PTMS WET High Intensity Magnetic Separator quartz feldspar flotation separation new process, flotation separation new process from anion and anion mixed collector, the method is in natural neutral medium, using quartz, feldspar structure composition difference, The separation of feldspar can be realized by the flotation of feldspar with reasonable proportion of cationic and anion collector.
Mica and quartz have similar isoelectric points, so it is difficult to separate them. Good results can be obtained by using anionic collector under acidic condition or anionic and cationic collector under alkaline condition. In general, after scrubbing, desiming, PTMS WET High Intensity Magnetic Separator separation and flotation, the purity of quartz can reach 99.3%-99.9%, basically meeting the needs of industrial sand.
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