Comprehensive recovery method for extracting ferrovanadium from stone coal acid immersion liquid
A recovery method, stone coal acid technology, applied in the direction of improving process efficiency, etc., can solve the problems of difficult liquid-solid separation, long process flow, difficult extraction and phase separation, etc., to reduce environmental pollution, avoid ammonia nitrogen wastewater, and facilitate liquid-solid separation effect
Examples
Embodiment 1
[0030] with V 2 o 5Add 3000ml of stone coal acid leaching solution containing 3.83g / L vanadium, add ammonia water to adjust the pH value to 3.0 to remove aluminum by crystalline ammonium aluminum sulfate alum, and oxidize ferrous iron, ferric vanadium and tetravalent vanadium according to the oxidation of ferrous iron in the solution Add sodium chlorate to 1.5 times the stoichiometric amount of pentavalent vanadium, add jarosite as a seed crystal and stir at 85°C for 1 hour to precipitate a mixture of vanadium-containing jarosite and jarosite, a mixture of vanadium-containing jarosite and jarosite According to the solid-liquid ratio of 1:3g / ml, add NaOH to control the pH value of 13, 80°C, stir and leach for 1.5 hours and filter, the filter residue is calcined at 350°C for 2 hours to obtain iron red with a purity of 99.5%, and the filtrate is 85°C Add sulfuric acid to adjust the pH value 1.5 Precipitate vanadium, filter and wash to obtain red vanadium filter cake, red cake is...
Embodiment 2
[0032] with V 2 o 5 1000ml of stone coal acid leaching solution containing vanadium 9.31g / L, according to NH 4 Al(SO 4 ) 2 12H 2 1.5 times of the stoichiometric number of O crystal precipitation is added in the leaching solution (NH 4 ) SO 4 , to remove aluminum by crystallization, and add CaCO to the liquid after crystallization 3 Neutralize until the pH value is filtered to 2.0, and the filtrate is oxidized to ferric iron by ferrous iron and oxidized by trivalent vanadium and tetravalent vanadium to 1.5 times of the stoichiometric number of pentavalent vanadium. The mixture of vanadium jarosite and jarosite is used as the crystal seed and stirred and leached at 60°C for 2.0 hours, and the mixture of vanadium-containing jarosite and jarosite is precipitated, and the mixture of vanadium-containing jarosite and jarosite is at a solid-to-liquid ratio of 1:4.5g / ml, adding the mixed solution of sodium hydroxide and sodium carbonate obtained in Example 1, stirring and leach...
Embodiment 3
[0034] with V 2 o 5 Measure the stone coal pickling solution 500ml that contains vanadium 20.15g / L, add the ammonium sulfate regeneration solution that embodiment 2 obtains, crystallize out aluminum ammonium sulfate alum NH 4 Al(SO 4 ) 2 12H 2 O crystals were filtered, and CaCO was added to the solution after crystallization 3 Neutralize until the pH value is filtered to 1.8, and the filtrate is oxidized to ferric iron and trivalent vanadium and tetravalent vanadium to 1.5 times the stoichiometric number of pentavalent vanadium by ferrous iron and adds sodium persulfate, adding the obtained in Example 1 The mixture of vanadium-containing jarosite and jarosite is used as the crystal seed and stirred and leached at 95°C for 1 hour, and the mixture of vanadium-containing jarosite and jarosite is precipitated, and the precipitation mixture is at a solid-to-liquid ratio of 1:2.5g / ml, and potassium hydroxide is added Control the pH value at 12.5, 55°C, stir and leach for 3 hour...
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Description
Claims
Application Information
- IPC
- C22B34/22; C22B3/44
- CPC
- Y02P10/20
- Inventors
- 王å¦æ–‡; 王明玉