Method for extracting cesium and rubidium from lepidolite
A technology of lepidolite and lepidolite powder, applied in the direction of improving process efficiency and so on
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Embodiment 1
[0077] The method for extracting cesium and rubidium from lepidolite is as follows:
[0078] 5000g of lepidolite ore was ground into lepidolite powder, wherein -200 mesh lepidolite powder accounted for 80wt% of all lepidolite powder.
[0079] Mix the lepidolite powder with 90% concentrated sulfuric acid, the mass ratio of the concentrated sulfuric acid to the lepidolite powder is 0.85, and then roast at 270° C. to obtain the lepidolite clinker.
[0080] The lepidolite clinker was stirred and leached with 20L of water at 80°C, followed by solid-liquid separation and the leaching solution was retained to obtain a rubidium and cesium enrichment solution. In the enrichment solution of rubidium and cesium, K 2 O, Rb 2 O and Cs 2 The leaching rate of O reaches 96%, 95% and 95% successively.
[0081] Lower the temperature of the enriched solution obtained from rubidium and cesium to 30°C for cold crystallization, then separate the solid from the liquid and retain the solid to obt...
Embodiment 2
[0089] The method for extracting cesium and rubidium from lepidolite is as follows:
[0090] 1000g of lepidolite ore was ground into lepidolite powder, wherein -200 mesh lepidolite powder accounted for 70wt% of all lepidolite powder.
[0091] Mix lepidolite powder with 70% concentrated sulfuric acid, the mass ratio of concentrated sulfuric acid to lepidolite powder is 1.7, then roast at 120°C to obtain lepidolite clinker.
[0092] The lepidolite clinker was stirred and leached with 5L of water at 95°C, followed by solid-liquid separation and the leaching solution was retained to obtain a rubidium and cesium enrichment solution. In the enrichment solution of rubidium and cesium, K 2 O, Rb 2 O and Cs 2 The leaching rate of O reaches 96%, 95% and 95% successively.
[0093] Lower the temperature of the enriched solution obtained from rubidium and cesium to 50°C for cold crystallization, then separate the solid from the liquid and retain the solid to obtain the mixed alum and c...
Embodiment 3
[0101] The method for extracting cesium and rubidium from lepidolite is as follows:
[0102] 50000g of lepidolite ore was ground into lepidolite powder, wherein -200 mesh lepidolite powder accounted for 60wt% of all lepidolite powder.
[0103] Mix lepidolite powder with 85% concentrated sulfuric acid, the mass ratio of concentrated sulfuric acid to lepidolite powder is 1.36, and then roast at 200°C to obtain lepidolite clinker.
[0104] The lepidolite clinker was stirred and leached with 200L of water at 85°C, followed by solid-liquid separation and the leaching solution was retained to obtain a rubidium and cesium enrichment solution. In the enrichment solution of rubidium and cesium, K 2 O, Rb 2 O and Cs 2 The leaching rate of O reaches 96%, 95% and 95% successively.
[0105] Lower the temperature of the enriched solution obtained from rubidium and cesium to 35°C for cold crystallization, then separate the solid from the liquid and retain the solid to obtain the mixed al...
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