Cov txheej txheem npaj ntawm nickel particles muaj xws li:
Electrolysis txoj kev: enriched sulfide ore yog roasted rau hauv oxide, txo kom crude nickel nrog carbon, thiab ces electrolyzed kom tau ntshiab metallic npib tsib xee.
Txoj kev Carbonylation: sulfide nickel ore reacts nrog carbon monoxide los tsim tetracarbonyl nickel, uas yog rhuab thiab decomposed kom tau high-purity metallic npib tsib xee.
Txoj kev txo qis dej: nickel tau los ntawm kev txo cov nickel oxide nrog hydrogen.
Ore calcination method: tom qab cov ore yog calcined rau hauv oxide, nws raug txo nrog dej, roj los yog carbon kom tau nickel.