System and method for extracting lithium from salt lake brine and preparing battery-grade lithium carbonate
The invention provides a system and a method for extracting lithium from salt lake brine and preparing battery-grade lithium carbonate. The system comprises a coagulating sedimentation system, a filtering system, an adsorption and desorption system, a calcium and magnesium removal system, a boron re...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides a system and a method for extracting lithium from salt lake brine and preparing battery-grade lithium carbonate. The system comprises a coagulating sedimentation system, a filtering system, an adsorption and desorption system, a calcium and magnesium removal system, a boron removal system, a concentration system, an evaporation system and a lithium sedimentation system which are connected in sequence, the calcium and magnesium removal system comprises a first-stage reverse osmosis concentration unit, a first-stage nanofiltration calcium and magnesium removal unit, a second-stage reverse osmosis concentration unit, a multi-stage nanofiltration calcium and magnesium removal unit and a calcium and magnesium removal ion exchange unit which are connected in sequence; the boron removal system comprises a first-stage nanofiltration boron removal unit, a multi-stage nanofiltration boron removal unit and a boron removal ion exchange unit which are connected in sequence; and a precise filtering s |
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