Method for extracting soluble potassium ions by adopting hydromica barium ion exchange method

[0021] (1) Use a ball mill to pulverize the hydromica ore and pass it through a 200-mesh sieve, then carry out acid treatment, that is, soak it in hydrochloric acid with a concentration of 10wt% for 2 hours, take the sample and dry it, and use X-ray fluorescence (XRF) to analyze the obtained sample to measure the The potassium content w 0 (KO 2 ) is 3.01%;

[0022] (2) The water mica after the acid treatment is mixed with the aqueous solution of barium chloride with a concentration of 0.25mol / L. The mass volume ratio of the water mica and the aqueous solution of barium chloride is 1:20g / mL. The solution adjusts the pH value of the mixture to 2, places it in a constant temperature water bath at 30° C. and stirs it for 1 hour, collects the filtrate containing potassium ions by filtration, and measures the potassium content in the solid insoluble matter (potassium extraction residue). 1 It is 2.02%; the total depotassiation rate is 32.9%{w=(w 0 -w 1 ) / w 0}.

[0023] fig

[0025] (1) Use a ball mill to pulverize the hydromica ore and pass it through a 200-mesh sieve, then carry out acid treatment, that is, soak it in hydrochloric acid with a concentration of 10wt% for 2 hours, take the sample and dry it, and use X-ray fluorescence (XRF) to analyze the obtained sample to measure the The potassium content w 0 (KO 2 ) is 6.72%;

[0026] (2) The water mica after the acid treatment is mixed with the aqueous solution of barium chloride with a concentration of 1.00mol / L. The mass volume ratio of the water mica and the aqueous solution of barium chloride is 1:30g / mL. The solution adjusted the pH value of the mixture to 3, placed in a constant temperature water bath at 50°C and stirred for 3 hours, filtered to collect the filtrate containing potassium ions, and measured the potassium content in the solid insoluble matter w 1 It was 2.89%; the total potassium removal rate was 56.99% {w=(w0-w1) / w0}.

[0028] (1) Use a ball mill to pulverize the hydromica ore and pass it through a 200-mesh sieve, then carry out acid treatment, that is, soak it in hydrochloric acid with a concentration of 10wt% for 2 hours, take the sample and dry it, and analyze the obtained sample with X-ray fluorescence (XRF) to measure the The potassium content w 0 (KO 2 ) is 10.54%;

[0029] (2) The water mica after the acid treatment is mixed with the aqueous solution of barium chloride with a concentration of 1.75mol / L. The mass volume ratio of the water mica and the aqueous solution of barium chloride is 1:50g / mL. The solution adjusted the pH value of the mixture to 5, placed in a constant temperature water bath at 70°C and stirred for 5 hours, filtered to collect the filtrate containing potassium ions, and determined the potassium content in the solid insoluble matter w 1 It is 2.66%; the total depotassiation rate is 74.77%{w=(w 0 -w 1 ) / w 0}.

[0030] It can be seen from the above examples