Method and system for improving yield of ammonium carnallite prepared by natural evaporation

• Main Authors: DU YONGSHENG, LIU XIN, MA YANFANG, ZHANG ZHIHONG, LI SHENGTING, HUANG SHOUYAN, FU ZHENHAI
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2024
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY

The invention provides a method and a system for improving the yield of carnallite prepared by natural evaporation. The method comprises the following steps: naturally evaporating a first evaporated solution containing MgCl2 and NH4Cl to produce carnallite, separating the residual solution from the carnallite when the concentration of NH410 in the solution is reduced to below a set concentration, then supplementing NH4 < + > into the separated residual solution to form a second evaporated solution, and naturally evaporating the second evaporated solution to obtain the carnallite. And the carnallite is continuously produced. According to the method disclosed by the invention, the rats of the milling root ions in the solution in the natural evaporation process are regulated and controlled, and multi-stage evaporation is carried out, so that the natural evaporation efficiency and the yield of the carnallite are improved, and meanwhile, high-grade carnallite ore is obtained; the natural evaporation method is high