Refining & Grade Specs

Nickel Refining Methods and Grade Specifications

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

Refining Processes

The primary refining and processing pathways for Nickel include:

1. Rotary kiln-electric furnace (RKEF) for NPI
2. High-pressure acid leaching (HPAL) for MHP
3. Flash smelting (sulfide concentrates)
4. Sherritt-Gordon ammonia pressure leach

Product Forms and Grade Specifications

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

Quality Standards and Benchmarks

International standards for Nickel products are established by organizations such as ASTM International and various national standards bodies. Pricing is referenced against LME/Shanghai Futures Exchange 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 Nickel is concentrated in a limited number of countries. Indonesia controls approximately 55% 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 stainless steel production sector.