Refining & Grade Specs

Lithium Refining Methods and Grade Specifications

The transformation of Lithium concentrate into refined products suitable for industrial use requires specialized metallurgical and chemical processes. Lithium is refined into 5 primary commercial forms, each serving specific end-use sectors.

Refining Processes

The primary refining and processing pathways for Lithium include:

1. Acid roasting and water leaching (spodumene)
2. Solar evaporation and precipitation (brine)
3. Direct lithium extraction (various DLE technologies)
4. Conversion to lithium carbonate or hydroxide

Product Forms and Grade Specifications

Refined Lithium is available in the following commercial forms, each with specific purity requirements:

Quality Standards and Benchmarks

International standards for Lithium products are established by organizations such as ASTM International and various national standards bodies. Pricing is referenced against Fastmarkets/Benchmark Minerals/Platts assessments. These standards define minimum purity levels, acceptable impurity limits, and testing methodologies that facilitate international trade.

Refining Capacity and Geography

Global refining capacity for Lithium is concentrated in a limited number of countries. Australia controls approximately 47% of primary production and plays a significant role in downstream refining. Efforts to diversify refining capacity are a key priority for governments seeking to reduce supply chain dependencies, particularly in the lithium-ion batteries for evs sector.