Analysis of quartz floatability using design of experiments

Vanderson Eney de Matos,Antônio Eduardo Clark Peres,Carlos Alberto Pereira,Stephânia da Consolação Silva Nogueira

doi:10.1590/0370-44672018720080

Vanderson Eney de Matos, Antônio Eduardo Clark Peres + Show 2 more

Open Access

https://doi.org/10.1590/0370-44672018720080

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Abstract

Abstract Quartz floatability in cationic reverse flotation depends on the suitable choice of surfactant type and the conditions under which they are applied. The design of experiments (DOE) allows the evaluation of process variables, in a structured and independent way, with statistical validation and a limited number of tests. Tests of microflotation of quartz, in the size range -150 +75 µm, using factorial design of experiments, showed that etherdiamine leads to higher level of quartz floatability than ethermonoamine, favored by increase in collector concentration, at the high level of pH tested (11.0). Floatability values above 90% were achieved with the use of 3 mg/L of ether diamine for both pH levels, while with ether monoamine the target was reached only at pH 11.

Highlights

The major routes used in iron ore concentration are froth flotation and magnetic separation
The results of all tests, with respect centration, and pH are shown in Table 2, cube plot in Figure 2. to the variable collector type, amine con- and can be visualized in the vertices of the
The results shown on the Pareto plot indicate that all tested variables and their interactions are statistically significant for the response, considering a 95% confidence interval

Summary

Introduction

The major routes used in iron ore concentration are froth flotation and magnetic separation. In Brazil, the production of iron ore concentrates from itabirites started in 1972 with the use of WHIMS (wet high intensity magnetic separation). The flotation routes viable for use in iron ore concentration are direct flotation of iron oxides and reverse quartz flotation, either via the anionic route after surface activation or the cationic one (Araujo et al, 2005; Filippov et al, 2014). The reverse cationic flotation of quartz is the most widely utilized in the beneficiation of low grade iron ores, such as the Brazilian itabirites, for the production of high quality pellet feed (Araujo et al, 2005; Vieira and Peres, 2007; Filippov et al, 2014). The anionic flotation is widely applied to low grade Chinese ores

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