Companhia Brasileira de Alumínio (CBA) has bauxite processing plants at Poços de Caldas and Itamarati de Minas, and a new processing plant at Miraí that has been operating since June, 2008; all of them are in the State of Minas Gerais. The plants haveunits for the crushing, scrubbing and screening operations. The screened oversize is the concentrate or washed bauxite. At Itamarati de Minas, the...

This paper reports new results regarding the usefulness of colour measurements in flotation process. Colour measurements coming simultaneously from RGB-camera and a spectrophotometer (and from the same measurement point) are compared. The measured variables are used to construct a partial least squares (PLS) model and a multilinear regression (MLR) model for the prediction of the zinc content i...

A highly efficient froth flotation procedure has been developed for harvesting algae from dilute suspensions. The method does not depend upon the addition of flotants. Harvesting is carried out in a long column containing the feed solution which is aerated from below. A stable column of foam is produced and harvested from a side arm near the top of the column. The cell concentration of the harv...

In mining, froth flotation is the largest tonnage separation process used to separate valuable minerals from waste rock [...]

Now that high quality reserves are diminishing and quality specifications are becoming more strict, more processing is required to maintain quality standards. Additional environmental pressures have also reduced the attractiveness and cost effectiveness of the chemical based froth flotation process. As a result there has been a resurgence of interest in the purely physical processes of gravity ...

Antimony has a long and diverse history of applications, concerns about its future supply have emerged in recent years. Stibnite-bearing ores continue to be the main source this critical element, although sourcing from secondary resources (e.g. mine tailings) is becoming increasingly relevant yet technically challenging. In sense, froth flotation plays key role recovery stibnite both sources. v...