Process for extracting lithium salt from montebrasite
A technology for extracting lithium and lithium aluminum, applied in the direction of lithium carbonate;/acid carbonate, etc., which can solve the problems of insufficient reaction, high risk factor, and high requirements for machinery and equipment
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Embodiment 1
[0036] This embodiment provides the first process for extracting lithium salt from phosphopersite, and the specific steps are as follows:
[0037] Step 1. Mix 100.0 g of finely ground phosphoperthite powder and 60.0 g of potassium sulfate and calcinate at 700° C. for 90 minutes to obtain clinker;
[0038] Step 2, dissolving and leaching the clinker with water according to a liquid-solid ratio of 2:1, and suction filtering to obtain a lithium-containing salt leaching solution;
[0039] Step 3, first adjust the pH of the lithium-containing salt leachate to 5 with 10% sodium hydroxide solution, then adjust the pH to 12 to remove impurities, then evaporate and concentrate to obtain a lithium sulfate concentrated solution, and then add 102 g of 30% sodium carbonate solution The reaction was carried out under stirring to obtain crude lithium carbonate, which was washed twice with water, dried at 150° C., and cooled to room temperature to obtain lithium carbonate.
[0040] The produ...
Embodiment 2
[0042] This embodiment provides the second process for extracting lithium salt from phosphopersite, the specific steps are as follows:
[0043] Step 1. Mix 100.0 g of finely ground phosphopersite powder and 60.0 g of potassium sulfate and calcinate at 700° C. for 150 minutes to obtain clinker;
[0044] Step 2, dissolving and leaching the clinker with water according to a liquid-solid ratio of 2:1, and suction filtering to obtain a lithium-containing salt leaching solution;
[0045] Step 3, first adjust the pH of the lithium-containing salt leachate to 5 with 10% sodium hydroxide solution, then adjust the pH to 12 to remove impurities, then evaporate and concentrate to obtain a lithium sulfate concentrated solution, and then add 102 g of 30% sodium carbonate solution The reaction was carried out under stirring to obtain crude lithium carbonate, which was washed twice with water, dried at 150° C., and cooled to room temperature to obtain lithium carbonate.
[0046] The producti...
Embodiment 3
[0048] This embodiment provides the third process for extracting lithium salt from phosphopersite, the specific steps are as follows:
[0049] Step 1. Mix 100.0 g of finely ground phosphoperthite powder and 60.0 g of potassium sulfate and calcinate at 750° C. for 90 minutes to obtain clinker;
[0050] Step 2, dissolving and leaching the clinker with water according to a liquid-solid ratio of 2:1, and suction filtering to obtain a lithium-containing salt leaching solution;
[0051] Step 3, first adjust the pH of the lithium-containing salt leachate to 5 with 10% sodium hydroxide solution, then adjust the pH to 12 to remove impurities, then evaporate and concentrate to obtain a lithium sulfate concentrated solution, and then add 102 g of 30% sodium carbonate solution The reaction was carried out under stirring to obtain crude lithium carbonate, which was washed twice with water, dried at 150° C., and cooled to room temperature to obtain lithium carbonate.
[0052] The productiv...
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