Method for depositing and separating tungsten and molybdenum in tungstate/molybdate mixed solution
A technology of mixed solution and tungstomolybdate, which is applied in the direction of improving process efficiency and can solve problems such as difficult direct processing
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Embodiment 1
[0019] Embodiment 1. sodium tungstate sodium molybdate mixed solution 5L, containing Mo 2g / L, WO 3 6.0 g / L, pH=12. Under the conditions of room temperature and a stirring speed of 150rpm, add the required reagent according to 2.0 times of the theoretical amount, that is, slowly add 39g of manganese sulfate (adding the manganese sulfate solution prepared as 200-300g / L), then continue to stir for 5 hours and then filter , the filtrate contains Mo 1.8g / L, WO 3 0.4g / L. Add 1.2 times NaOH to the tungsten-rich slag, that is, 12g, then add 200ml of water, keep it in an autoclave at 120°C for 2 hours and then filter, the filtrate contains WO 3 138g / L, Mo 4.6g / L. Add 38ml of 50% sulfuric acid to the manganese slag according to 1.5 times the theoretical amount, add 50ml of water, and stir at room temperature for 30 minutes.
Embodiment 2
[0020] Embodiment 2. sodium tungstate sodium molybdate mixed solution 5L, containing Mo 8g / L, WO 3 4.0 g / L, pH=8.2. Under the conditions of room temperature and a stirring speed of 150rpm, add the required reagent by 1.2 times of the theoretical amount, that is, slowly add 15.6g of manganese sulfate (addition of manganese sulfate solution prepared as 200-300g / L), and then continue to stir for 2 hours Filter, Mo 7.7g / L is contained in the filtrate, WO 3 0.36g / L. Add 1.2 times NaOH to the tungsten-rich slag, that is, 7.5g, then add 200ml of water, keep it in an autoclave at 120°C for 2 hours and then filter, the filtrate contains WO 3 89g / L, Mo 7.5g / L. Add 15.3ml of 50% sulfuric acid to the manganese slag according to 1.5 times the theoretical amount, add 50ml of water, and stir at room temperature for 30 minutes.
Embodiment 3
[0021] Embodiment 3. Ammonium tungstate ammonium molybdate mixed solution 5L, containing Mo 15g / L, WO 3 5.0 g / L, pH=7.0. Under the conditions of room temperature and a stirring speed of 150rpm, add the required reagent by 1.0 times of the theoretical amount, that is, slowly add 16.2g of manganese sulfate (addition of manganese sulfate solution prepared as 200-300g / L), and then continue to stir for 10 minutes After standing and clarifying, filter, the filtrate contains Mo 14.6g / L, WO 3 0.44g / L. Add 1.2 times NaOH to the tungsten-rich slag, that is, 9.5g, then add 200ml of water, keep it in an autoclave at 120°C for 2 hours and then filter, the filtrate contains WO 3 110g / L, Mo 9g / L. Add 15.3ml of 50% sulfuric acid to the manganese slag according to 1.5 times the theoretical amount, add 50ml of water, and stir at room temperature for 30 minutes.
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