The main production processes for battery-grade lithium carbonate are as follows:

Extraction from salt lake brine is a vital route for producing battery-grade lithium carbonate. This process mainly involves evaporating and concentrating salt lake brine, adding precipitants to remove impurities, and then introducing sodium carbonate to precipitate lithium carbonate. Other technologies including solvent extraction lithium extraction and electrodialysis can effectively control impurity levels to produce high-purity battery-grade lithium carbonate.

Lithium ore constitutes another major raw material source of battery-grade lithium carbonate. Core ore extraction technologies cover the sulfuric acid process, chlorination roasting process and limestone roasting process.

Driven by the rapid growth of new energy vehicles and energy storage power stations, recycling spent lithium batteries has become an important supply channel for battery-grade lithium carbonate. Lithium carbonate can be recovered from waste batteries through crushing, separation, leaching and precipitation. This technology realizes resource recycling and mitigates environmental pollution.

Multiple production technologies are available for battery-grade lithium carbonate, each with unique characteristics and applicable scenarios. In actual manufacturing, the optimal process shall be selected based on comprehensive factors such as raw material supply, production cost and product quality requirements.