Flotation separation method for industrial by-products sodium chloride and sodium sulfate

• Main Authors: LIANG GAOJIE, XIE QIAOLING, WANG DANDAN
• Format: Patent
• Language: Chinese; English
• Published: 12.03.2021
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY

The invention relates to a flotation separation method for industrial by-products sodium chloride and sodium sulfate. The method comprises the following steps: (1) preparing of saturated salt water: dissolving excessive sodium chloride and sodium sulfate in water to prepare saturated salt water; (2) ball milling: carrying out ball milling on the mixed salt of sodium chloride and sodium sulfate andsaturated salt water according to a set ratio, so that monomer dissociation of the mixed salt mixed with each other is realized; (3) aging: after ball milling, putting the mixed salt into saturated salt water, adding a set amount of additive, and then carrying out aging treatment under the action of stirring, so that small particles disappear, large particles grow up, and the mixed salt is further dissociated; (4) flotation: adjusting the concentration of sodium chloride and sodium sulfate mixed salt slurry, placing the slurry in a flotation machine, adjusting pH, then adding an inhibitor, and adding a collecting age