USING NANOCELLULOSE FOR SURFACE MODIFICATION OF MAGNETITE AND SILICATE IN MINERAL SLURRIES

Reference number
Coordinator Luleå tekniska universitet - Avdelningen för mineralteknik och metallurgi
Funding from Vinnova SEK 490 000
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

The project shows that nano-entities can to a large extent modify the surface charge of magnetite and quartz. Micro-flotation shows that nano-entities can induce hydrophobicity to mineral surfaces. Mini-flotation, with mixtures of quartz and magnetite in a small mechanical cell and with added nano-entities, shows that it is possible to achieve selective flotation of quartz, but the recovery is low.

Results and expected effects

Mini-flotation, with mixtures of quartz and magnetite in a small mechanical cell and with added nano-entities, shows that it is possible to achieve selective flotation of quartz, but the recovery is low. The results show that nano-entities with surface active groups can be guided to adsorb on mineral surfaces, and induce hydrophobicity. As a result, quartz can be made to selectively float from magnetite. This may be a starting point for intelligent modification of nano-entities, and might lead to the replacement of amines in silicate flotation.

Approach and implementation

Production and modification of nano-entities has worked without any problems. The measurement of Zeta potential to study adsorption of nano particles on mineral surfaces has worked well. Micro-flotation of single minerals and mineral combinations has shown that it is possible to get some understanding whether the treatments will change the hydrophobic/hydrophilic balance on the mineral surfaces. Mini-flotation with mixtures of quartz and magnetite has given indications that there are conditions to have selective flotation quartz at larger scales.

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 2015-01300

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