Cerro Matoso Sa

Renato Antonio Loaiza Aguilar

Houyuan Liu

Ruben Rangel De Hoyos

Omar Yesid Caceres Hernandez

Carolina Isabel Meneses Rodriguez

Carolina Isabel Meneses Rodríguez

Illich Alvarez Mercado

Carolina Isabel Meneses RODRÍGUEZ

A process for the removal of ferric iron as hematite from a nickel solution containing ferric and ferrous ions including the steps of: raising the temperature of the nickel solution to between 90&#xb0; C. and the boiling point of the solution at atmospheric pressure; raising the pH of the nickel solution to be between 2 and 3; and adding a hematite seed to facilitate hematite precipitation, wherein ferric ions are precipitated as hematite in a predominantly crystalline form.

Removal of ferric iron as hematite at atmospheric pressure

A process for the production of a high grade nickel product including the steps of: a) providing at least one heap of a nickeliferous lateritic ore and leaching that heap with a suitable lixiviant, preferably sulfuric acid solution, to produce a nickel rich pregnant leach solution (PLS); b) subjecting the PLS to an impurity removal step to precipitate ferric iron, and preferably partially precipitate aluminum and chromium as hydroxides; and c) recovering a high grade nickel product from the PLS preferably by either nickel ion exchange, solvent extraction, electrowinning, conventional multi-stage neutralization, pyrohydrolysis or sulfidation.

Production of high grade nickel product

Growing community of inventors

Cordobo, Colombia

Renato Antonio Loaiza Aguilar