Question

Metallurgy/Flotation question:

It is desired to float pyrite, FeS₂, from coal. Describe a method by which this could be accomplished. In this description include all solution conditions and chemical additions required for the pyrite to be stable at the air/water interface. Clearly justify why flotation is either occurring or not for each solid type present.

        If quartz, SiO₂, were present in this system would it float with the FeS₂ under the conditions you described above, why or why not?

Answer 1

There are many ways to remove Pyrire, FeS₂ ?from Coal.

These can be Chemical, Physical, Biological methods.

Different ways of removing the pyrite depends on the amount of the pyrite present in the coal and the type of coal, that is anthracite, bituminous or lignite.

Research has been performed in this regards by many people and to find the best possible method, it depends on the quality of the coal that is present. Go through various research papers that for that reference and the to find the best possible method.

For the question of SiO₂ ?getting in the floatation, it will not be present because of the difference in the density of the material that is present.

I have provided a very general explanation to the question due to the wide limitation and assumptions. Once again I would recommend that you go through various research papers that are published in order to find the best possible way to remove the pyrite from coal.