Method for extracting iodine from iodine-containing phosphorus ore
A technology for extracting iodine from phosphate rock, applied in the field of iodine extraction, which can solve the problems of sieve plate clogging, poor extraction effect, low start-up rate, etc., and achieve the effect of prolonging the operation cycle, reducing cleaning work, and improving the extraction rate
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[0018] Example Wengfu (Group) Co., Ltd. adopts the phosphate rock iodine extraction technology of the present invention:
[0019] (1) Add oxidant directly on the phosphoric acid transfer pipeline. The oxidant is a strong oxidant prepared with hydrogen peroxide, and the oxidant flow rate is controlled at 110L / h;
[0020] (2) The dilute phosphoric acid enters the extraction tower directly, and the flow of dilute phosphoric acid is controlled at 130m 3 / h, the temperature is controlled at 75℃~80℃;
[0021] (3) The extraction gas adopts a tangential air intake method to make the dilute acid produce a swirling flow to achieve a better extraction effect; the air intake volume is controlled at 10000~14000m 3 / h, the temperature is controlled at 55℃~60℃;
[0022] (4) The sieve plate selects a bubbling sieve plate with an opening ratio of 13.5% and an opening diameter of 22mm, which can effectively bubble, make the extraction gas and the dilute acid fully contact, and thoroughly extract the iod...
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