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Froth Flotation Services

GSL offers a comprehensive range of froth flotation services. We specialise in integrating comminution, grinding chemistry and froth flotation to optimise the whole process and/or to better replicate plant conditions.

We provide a tailored service using our experience in understanding the complexities of separation using froth flotation and can adapt our experimental procedure to fit your required outcomes. Our laboratory equipment includes Denver and Wemco top driven float cells and a Magotteaux bottom driven float cell, with cell capacities from 1 to 5 L. Following testwork, we use a range of analytical tools to characterise test products, such as XRF and Malvern Mastersizer 3000 as well as external analytical techniques such as chemical assay and SEM. In addition, measurements of air recovery and froth characteristics can further inform our interpretation of the data.

Whether sulphide or non-sulphide mineral systems, fine or coarse particle flotation, we can provide highly customised service packages. GSL offers the following range of testing:

Batch Testing

Batch tests are used for evaluating the front end performance of flotation. A number of different criteria can be investigated such as primary grind size, optimal reagent type and addition rates.

Rate Kinetic Testing

Rates kinetic testing is essential in determining the optimal float times and scaling up of the flotation cells. By splitting the flotation stages into multiple concentrates an overview of the flotation stage in terms of grade and recovery can be obtained. The tests can also be used to ensure that the reagent type and addition rate are working effectively.

Open circuit testing

Using open circuit testing, a full circuit configuration can be developed, tested and evaluated. This is used to maximise the efficiency of the cleaners and optimise any regrinds within the circuit. Regrinds can be carried out using stirred media mills such as the SMD. A full circuit test indicates the grades of re-circulating loads and elude to the possibility of slime generation.

Locked Cycle

Locked cycle testwork can be undertaken to test the stability and robustness of devised circuit configuration over a multitude of cycles. Locked Cycle tests are essential in determining the  likely plant grades/recoveries once the system has achieved steady state with regards the re-circulating loads. Following Locked Cycle testing a full metallurgical balance can be derived and plant performance projections. Analytical tools in addition to chemical assay, such as particle size analysis and optical analysis on concentrates, allow for broad range of information to be gathered.