Tecnologia em Metalurgia, Materiais e Mineração
Tecnologia em Metalurgia, Materiais e Mineração
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Amilton Barbosa Botelho Junior, Denise Crocce Romano Espinosa, David Dreisinger, Jorge Alberto Soares Tenório

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Copper, nickel and cobalt can be found in nickel laterite ores. After leaching process of nickel ore, it is necessary a purification step to recover these metals. Chelating ion exchange resins can be applied to purify the liquor generated. The aim of this work was study two different chelating resins to recover these metals by three different synthetic solutions to simulate real conditions. Batch experiments were performed, and effect of pH was studied. First solution was prepared with all metal, and resin Lewatit TP 207 with iminodiacetate functional group was used to recover selectively copper. The second solution, without copper, was prepared and resin Lewatit TP 220 with bis-picolylamine functional group to recover nickel. Then, the last solution was prepared without copper and nickel using Lewatit TP 220 to recovery cobalt selectively. Results shows that, at pH 2.00, it is possible recover selectively copper using TP 207, nickel had higher selectively than cobalt in Solution 2 experiments and cobalt was highly recovered in Solution 3 experiments. These results are important to design industrial process to recover these metals.


Hydrometallurgy; Ion exchange; Nickel laterite.


Cobre, níquel e cobalto podem ser encontrados em minérios lateríticos de níquel. Após o processo de lixiviação do minério de níquel, é necessário uma etapa de purificação para recuperar estes metais. Resinas quelantes trocadoras de íons podem ser utilizadas para purificar o licor gerado. O objetivo deste trabalho foi estudar duas resinas quelantes diferentes para recuperar estes metais a partir de três soluções sintéticas para simular as condições reais. Ensaios em batelada foram realizados e o efeito do pH foi estudado. A primeira solução foi preparada com todos os metais, e a resina Lewatit TP 207 com grupo funcional iminodiacetato foi utilizada para recuperar o cobre seletivamente. A segunda solução, sem cobre, foi preparada e a resina Lewatit TP 220 com grupo funcional bis-picolilamina foi estudada para recuperar níquel. Então, a última solução foi preparada sem cobre e níquel utilizando Lewatit TP 220 para recuperar o cobre seletivamente. Resultados mostraram que, em pH 2,00, foi possível recuperar seletivamente cobre utilizando TP 207, níquel teve maior seletividade do que cobalto nos experimentos com a Solução 2 e cobalto teve alta recuperação em experimentos com a Solução 3. Estes resultados são importantes para projetar um processo industrial.


Hidrometalurgia; Troca iônica; Níquel laterítico.


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