A method for leaching lithium from fly ash
A fly ash and leaching technology, which is applied in the direction of improving process efficiency, can solve immature problems, achieve the effect of avoiding pollution and improving the value of refined utilization
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Embodiment 1
[0035] Sintering process: Weigh fly ash, sodium carbonate and calcium carbonate at a mass ratio of 1:0:1, mix them evenly in a 1L corundum crucible, place them in a muffle furnace for 80 minutes at 1200°C, cool to room temperature, and grind with a ball mill to 200 mesh to obtain sintered clinker.
[0036] Leaching process: 100g of ground clinker and 2.0L of 5% sodium carbonate solution were mixed evenly, then transferred to a colloid mill, mechanically ground for 30 minutes, then transferred to an autoclave, and the temperature of autoclaving was 150°C for 60min, after the completion, the mixed liquid in the autoclave was cooled, and suction filtered to obtain lithium leaching solution.
[0037] The atomic absorption spectrometer measures the concentration of lithium ions in the leaching solution, calculates the total lithium mass according to the volume of the leaching solution, and finally concludes that the mass of lithium in the leaching solution accounts for 27.22% of th...
Embodiment 2
[0039] Sintering process: Weigh fly ash, sodium carbonate and calcium carbonate at a mass ratio of 1:0.4:1, mix them evenly in a 1L corundum crucible, place them in a muffle furnace for 80 minutes at 1100°C, cool to room temperature, and grind with a ball mill to 200 mesh to obtain sintered clinker.
[0040]Leaching process: Mix 80g of ground clinker and 2.0L of 5% sodium carbonate solution evenly, then transfer to the colloid mill, mechanically grind for 30min, then transfer to the autoclave, the temperature of autoclaving is 150°C, and the time is 60min, after the completion, the mixed liquid in the autoclave was cooled, and suction filtered to obtain lithium leaching solution.
[0041] The atomic absorption spectrometer measures the concentration of lithium ions in the leaching solution, calculates the mass of the total lithium according to the volume of the leaching solution, and finally concludes that the mass of lithium in the leaching solution accounts for 47.11% of the...
Embodiment 3
[0043] Sintering process: Weigh fly ash, sodium carbonate and calcium carbonate at a mass ratio of 1:0.8:1, mix them evenly in a 1L corundum crucible, place them in a muffle furnace for 80 minutes at 1200°C, cool to room temperature, and grind with a ball mill to 200 mesh to obtain sintered clinker.
[0044] Leaching process: 120g of ground clinker and 2.0L of 5% sodium carbonate solution were mixed evenly and then transferred to a colloid mill, mechanically ground for 30 minutes and then transferred to an autoclave. The temperature of high-pressure cooking was 150°C for 60min, after the completion, the mixed liquid in the autoclave was cooled, and suction filtered to obtain lithium leaching solution.
[0045] The atomic absorption spectrometer measures the concentration of lithium ions in the leaching solution, and calculates the total lithium mass according to the volume of the leaching solution. Finally, it is concluded that the mass of lithium in the leaching solution acco...
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