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efficient medium quartz flotation machine in brisbane

An iron ore mineral processing plant in Brazil treating Itabirite ore was assessed by sampling a circuit consisting of Wemco 144 mechanical cells, as part of the AMIRA P9P collaborative research project. This paper presents and discusses the results of entrainability, water recovery and quartz and hematite grades associated to hydrodynamic parameters. The results indicated strong correlation between water recovery and hematite losses which was intensified by the operating conditions of the circuit Learn More

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the entrainment effect on the performance of iron ore

A potential alternative to reduce the hematite losses through entrainment and to increase quartz removal was to modify the traditional circuit design to treat rougher and cleaner/recleaner tails in different stages. In addition, the scavenger residence time must be matched to the quartz floatability. Changes to design and operation of these circuits are needed to sustain concentrate recovery and grade as iron ores become finer

ijmmme - flotation of lithium ores to obtain high-grade

1Laboratório Nacional de Energia e Geologia Rua da Amieira, Apartado 1089, S. Mamede de Infesta, Portugal [email protected]; [email protected]; [email protected] 2Institute of Earth Sciences, Porto Pole; Department of Geosciences, Environment and Spatial Planning of the Faculty of Sciences of the University of Porto Rua do Campo Alegre, 4169-007 Porto, Portugal [email protected]; [email protected]; [email protected]

Abstract - The current lithium demand for batteries in general and namely for the electrical vehicle, awakened the attention for mineral processing of lithium ores. The largest lithium reserves are in brines from western South America and in pegmatites. Throughout Europe it is possible to identify several lithium deposits, namely in granitic pegmatites. An efficient mineral processing approach could be the key for an economically viable mining project. This work addresses a mineral processing study by froth flotation of samples collected in two European lithium ore pegmatites deposits - Länttä (Finland) and Gonçalo (Portugal) and aims at paying attention to some mineralogical features that can decrease the mineral processing efficiency and consequently the upgrading of the Li2O concentrates. In the case of Länttä, spodumene is the main lithium mineral and a grade of 5.20 % Li2O is the maximum obtained in the concentrates, whilst lepidolite is the lithium-bearing mineral in Gonçalo and that can be concentrated by froth flotation up to 4.50 % Li2O. Taking into consideration the Li2O content of both Länttä spodumene and Gonçalo lepidolite, respectively 7.0 and 5.58 % Li2O, higher concentrate grades would be expected. In both studied cases, very fine quartz and albite inclusions locked in lithium silicates were identified justifying the existence of a limitation for the processing technology. The mineral processing of the two pegmatites revealed the difficulty of producing Li2O close to the stoichiometry of the spodumene and lepidolite in either of these two ores.

ijmmme - flotation of lithium ores to obtain high-grade

© Copyright 2019 Authors This is an Open Access article published under the Creative Commons Attribution License terms. Unrestricted use, distribution, and reproduction in any medium are permitted, provided the original work is properly cited

The present tendency for the development of portable devices and the application of batteries as power sources in electric cars and tools are creating an extra demand for lithium, being one of the most important strategic raw materials for many industries [2]. Batteries are considered the most suitable option for conservation, storage, and transmission of renewable energy. The capability of storing a large amount of energy within a given volume-to-mass ratio in a short period of time is considered the most critical characteristic of any battery [3, 4] and the lithium ion batteries are considered the most promising way to capture energy [5]. Due to that fact, the application of lithium ion batteries in the rechargeable batteries technology would be essential for the industrial growth, to reduce the environmental constraints linked to the traditional energy transmission technologies, to enhance the energy security, and to improve the daily life conditions [6, 7]. Lithium also finds application in other industries, such as ceramics, glass, primary aluminium production, pharmaceutical, manufacture of lubricants and greases, synthesis of vitamin A and organic compounds, among others [8, 9, 10, 11]

In 2016, the countries with the largest lithium reserves worldwide were Chile (7.5 Mt), China (3.2 Mt), Argentina (2 Mt), Australia (1.6 Mt), Brazil (0.48 Mt), Portugal (0.06 Mt), United States (0.038 Mt) and Zimbabwe (0.023 Mt). For the same considered year, the major countries in worldwide lithium mine production were Australia (14,300 t), Chile (12,000 t), Argentina (5,700 t), China (2,000 t), Zimbabwe (900 t), Portugal (200 t) and Brazil (200 t) (data in metric tons of lithium content) [12]

ijmmme - flotation of lithium ores to obtain high-grade

The main sources for lithium are brines and magmatic rocks rich in lithium silicate minerals and/or phosphates. The most important rock deposits of lithium are granitic pegmatites and greisens. It has been estimated an average lithium content on Earth’s upper continental crust of 21 ppm [13], included in more than 20 minerals. However, just some of them occur in magmatic crystalline rocks and have commercial/industrial potential – lepidolite, spodumene, petalite, amblygonite-montebrasite and zinnwaldite [2, 14].

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Flotation is also used to remove impurities before hydrometallurgical treatment ie carbon preflotation to purify lowsulfide and refractory ores for further processing Flotation is considered to be the most costeffective method of concentrating refined gold and is often used in conjunction with flotation

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