Concentration of manganese tailings via reverse flotation in an acid médium
AUTOR(ES)
Souza, Helder Silva, Braga, Andre Soares, Oliveira, Arildo Henrique de, Filho, Laurindo de Salles Leal
FONTE
Rem: Rev. Esc. Minas
DATA DE PUBLICAÇÃO
2016-03
RESUMO
Abstract Beneficiation of manganese ores has been conducted around the world by circuits composed basically of crushing, screening and spiral classifier. Therefore, solely the coarse size fractions (and commonly the richest) are actually recovered: "lump" (-75+9mm) and "sinter feed" (-9+0.15mm). In the industrial plant which processes the ore from the Azul Mine-PA, the overflow of the spiral classifier (- 0.15mm) is disposed of in a tailings dam because it bears a low Mn content (<10%) and high kaolinite content (70%). This paper reports the findings of a process development conducted on laboratory scale with the aim of concentrating Mn-bearing minerals from the tailings of the Azul Mine-PA (7% of Mn and 70% of kaolinite). The process is composed of desliming (-10µm), followed by reverse cationic flotation of kaolinite (rougher, scavenger) at pH~5. Results indicate that the reverse cationic flotation in the acid medium, when utilizing amide amine as collector and in the presence of a silicate activator and a dispersing agent could be a possible route for the concentration of tailings that had previously been deslimed at 10µm. The results yielded a mass recovery of 18%, a metallurgical recovery of 50% and a 32% Mn concentrate which may be mixed with current high grade products, increasing the overall recovery of the plant.
Documentos Relacionados
- Concentration of bauxite via reverse froth flotation.
- Influence of Mn2+ ion in reverse cationic flotation of iron ore
- Polyacrylamides in reverse cationic iron ore flotation: bench scale study
- Thallium Associated with Manganese Ore Tailings in a Deactivated Mine in the Western Region of Bahia, Brazil
- RELATION OF FOLIC ACID CONCENTRATION OF MEDIUM TO RIBOFLAVIN METABOLISM OF STREPTOCOCCUS FAECALIS1