ScreenFloat Screening av Flotationsreagens - Mineralers Interaktioner: en Ytkemisk Approach

Reference number
Coordinator RISE RESEARCH INSTITUTES OF SWEDEN AB - SP Kemi, material och ytor, Stockholm
Funding from Vinnova SEK 500 000
Project duration September 2015 - February 2016
Status Completed
Venture The strategic innovation programme for mining and metal recovery – STRIM
Call STRIM-Call spring 2015

Purpose and goal

There are several industrial relevant advantages with a fast screening method compared to the normal procedure used for testing of new ideas, i.e. batch-wise laboratory flotation tests. The main objective of this project was to provide a cost and time effective approach for testing of new reagents and new conditions in mineral flotation processes. The approach focused on evaluating a fast screening method to identify potential flotation reagents for a few specific minerals, combined with surface chemical characterization for increased understanding.

Expected results and effects

In this project, a screening method for in-situ studies of interactions between minerals and reagents was evaluated. For the minerals and process conditions chosen in the project the results show that ions are dissolved from the mineral surfaces, complicating the evaluation of data. Therefore, for the minerals and process conditions used the method did not work as planned, as a straightforward screening method. The surface chemistry characterization method on the other hand provided very interesting information of adsorption of different flotation reagents on mineral surfaces.

Planned approach and implementation

The project included six technical work packages. The aim of WP1 was to perform a literature study and select materials. In WP2-5 tests using QCM method were followed by surface chemical characterization of flat mineral surfaces. Focus in the different cases was to study adsorption on mineral surfaces and follow the effect of changes in pH and water quality, and the use of different collectors and depressants. Since more tests than planned were needed for QCM method, WP5 with adsorption on mineral particles could not be included. In WP6 the result were compared to known flotation response.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 25 November 2019

Reference number 2015-01388

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