Method for Comprehensive Recovery of Lithium Element in Aluminum Electrolyte by Acid Roasting and Leaching Method
A technology of acidification roasting and leaching method, applied in the direction of improving process efficiency, can solve the problems of limited resource utilization, waste electrolyte accumulation, waste, etc., and achieve the effects of reducing production cost, simple raw materials, and short time consumption
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Embodiment 1
[0039] The method for comprehensively recovering the lithium element in the aluminum electrolyte by the acidification roasting and leaching method specifically comprises the following steps:
[0040] S1. Take the aluminum electrolyte containing lithium, grind it and mix it with acid salt to obtain a mixture; the acid salt is NaHSO 4 , the amount of acid salt is: according to the molar ratio, H in the acid salt + : Li + =1:1;
[0041] S2. The mixture in step S1 is subjected to acidification roasting at 80°C, and after the acidification roasting, 1mol / L sodium hydroxide solution is introduced to recover tail gas;
[0042] S3. Add the roasted mixture in step S2 to water, adjust the pH value to 7, heat to 40°C, stir and react for 5 hours, then filter, then detect and maintain the lithium ion concentration in the filtrate, and set aside; wherein, the mass ratio of the mixture to water 1:1, add water to the filtrate to maintain the lithium ion concentration at 3g / L;
[0043] S4....
Embodiment 2
[0045] The method for comprehensively recovering the lithium element in the aluminum electrolyte by the acidification roasting and leaching method specifically comprises the following steps:
[0046] S1. Take the aluminum electrolyte containing lithium, grind it and mix it with the acid salt to obtain the mixture; the acid salt is NH 4 HSO 4 , the amount of acid salt is: according to the molar ratio, H in the acid salt + : Li + =5:1;
[0047] S2, acidifying and roasting the mixture in step S1 at 800°C;
[0048] S3. Add the roasted mixture in step S2 to water, adjust the pH value to 9, heat to 90°C, stir and react for 1 hour, then filter, then detect and maintain the lithium ion concentration in the filtrate, and set aside; wherein, the mass ratio of the mixture to water 1:10, evaporate the filtrate to maintain the lithium ion concentration at 20g / L;
[0049] S4. Add sodium carbonate to the filtrate obtained in step S3, heat to 60°C, stir and react for 4h and then filter; M...
Embodiment 3
[0051] The method for comprehensively recovering the lithium element in the aluminum electrolyte by the acidification roasting and leaching method specifically comprises the following steps:
[0052] S1. Take the aluminum electrolyte containing lithium, grind it and mix it with the acid salt to obtain the mixture; the acid salt is Na 2 HPO 4 , the amount of acid salt is: according to the molar ratio, H in the acid salt + : Li + =2:1;
[0053] S2. The mixture in step S1 is subjected to acidification roasting at 100°C, and after the acidification roasting, 1mol / L sodium hydroxide solution is introduced to recover tail gas;
[0054] S3. Add the roasted mixture in step S2 to water, adjust the pH value to 8, heat to 60°C, stir and react for 3 hours, then filter, then detect and maintain the lithium ion concentration in the filtrate, and set aside; wherein, the mass ratio of the mixture to water 1:5, the lithium ion concentration in the filtrate was maintained at 10g / L;
[0055...
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