Preparation method of spherical ammonium manganese vanadate particles
A manganese ammonium vanadate and particle technology is applied in the field of preparation of spherical manganese ammonium vanadate particles, which can solve the problems of high risk, complicated process, low yield and the like, so as to reduce production cost, shorten technological process and achieve high yield Effect
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[0013] Specifically, the invention provides a method for preparing spherical ammonium manganese vanadate particles. The method comprises the following steps: taking a calcified roasted vanadium leach solution with a vanadium concentration of 15-20 g / L, adjusting the pH value of the calcified roasted vanadium leach solution to 1.8-2.2 with a dilute hydrochloric acid solution with a volume fraction of 50%, adding ammonium chloride, adding The ammonium coefficient is calculated according to 2.3 to 2.8. Stir with a magnetic stirrer for 15 minutes at a speed of 300 rpm. Dry with a spray dryer. After the injection starts, continue to stir the feed liquid with a magnetic stirrer at a speed of 300 rpm. The spray dryer is fed with a peristaltic pump, the feed rate is 400mL / min, the inlet temperature is 200°C-220°C, and the outlet temperature is 55°C-75°C to obtain spherical ammonium manganese vanadate particles.
[0014] In order to facilitate the formation of ammonium manganese vanada...
Embodiment 1
[0019] Take 200mL of calcified and roasted vanadium leaching solution, containing 15g / L vanadium, 8g / L manganese, 10g / L calcium, 6g / L iron, 0.2g / L phosphorus, and 0.5g / L silicon, and add dilute hydrochloric acid solution with a volume fraction of 50% Adjust the pH to 1.8, then add 12.3g of ammonium chloride, the amount of ammonium added is calculated based on the ammonium addition coefficient of 2.3, stir with a magnetic stirrer for 15 minutes, the speed is 300 rpm, and continue to stir with a magnetic stirrer after the injection starts Feed liquid, the rotation speed is 300 rpm, the spray dryer is fed with a peristaltic pump, the feed speed is 400mL / min, the inlet temperature is 200°C, the outlet temperature is 55°C, the feed liquid is sprayed to obtain spherical ammonium manganese vanadate particles. The particle size is 2-8μm.
Embodiment 2
[0021] Take 200mL of calcified and roasted vanadium leaching solution, containing 18g / L of vanadium, 9g / L of manganese, 11g / L of calcium, 7g / L of iron, 0.3g / L of phosphorus, and 1g / L of silicon, and add dilute hydrochloric acid solution with a volume fraction of 50% to adjust When the pH reaches 2.2, add 12.3g of ammonium chloride. The amount of ammonium added is calculated based on the ammonium addition coefficient of 2.3. Stir with a magnetic stirrer for 15 minutes at a speed of 300 rpm. After the injection starts, continue to stir the material with a magnetic stirrer. liquid, the rotation speed is 300 rpm, the spray dryer is fed with a peristaltic pump, the feed rate is 400mL / min, the inlet temperature is 220°C, the outlet temperature is 75°C, spray the feed liquid, and obtain spherical ammonium manganese vanadate particles . The particle size is 3-9 μm.
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