Patent ID: 11891344
Assignee: CHTEM LIMITED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 12:
13. The method for graded utilization of fluorine and silicon resources in a phosphate ore of claim 1, wherein the liquid adsorption in the step (6) includes an activated carbon adsorption, a cation adsorption, and an anion adsorption, the activated carbon, a cation adsorbent, and a anion adsorbent are reused after being desorbed and regenerated when adsorption saturation; wherein
the desorption regeneration of the activated carbon is that the activated carbon is first desorbed with water, then desorbed using a sodium hydroxide solution of a mass fraction of 5% to 10%;
the desorption regeneration of the cationic adsorbent is that the cationic adsorbent is first desorbed with the water, then desorbed using a sulfuric acid solution of a mass fraction of 5% to 20%; and
the desorption regeneration of the anion adsorbent is that the anion adsorbent is first desorbed with the water, then desorbed using an ammonia of a mass fraction of 5% to 25%; wherein a desorption temperature is within a range of 60° C. to 80° C.; a desorption solution formed by the desorption of the water is returned to the step (2) to adsorb the tail gas; a the desorption solution formed by the desorption of the sodium hydroxide solution desorption and the ammonia water is configured for the fertilizer production, and the desorption solution formed by the desorption of the sulfuric acid solution is configured for the acidification of the phosphate ore.