Are there different grades of #2 fuel oil? 1

[BRT549]

I'm looking for info on #2 fuel oil. We use it in floatation cells to beneficiate phosphate ore. I remember a old chemist who used to work in uranium solvent (SX) extraction telling me there were many "grades" of #2 fuel oil. He mentioned a brand or grade called 'napoleum' that he said was far better for SX work than what was currently available.

I'm interested to know if there are better grades available, and what properties make them better. Also, would these properties that helped in SX applications do a better job in floation cells too?

 

[25362]

Let's start by saying that I haven't been involved with industrial flotation of minerals. As for your specific question: No.2 heating & No.2 diesel fuels are about the same with somewhat differing required specs. I pressume that the D quality is the one you are referring to, with volumetric limits on the aromatics' content. The effectiveness of the collectors depend on their adherence to the particular ore being floated, and, of course, their insolubility in water. I've heard that kerosine is sometimes used for the purpose in U extractions.

Good luck !

 

[jmw]

fuel oil density can vary significantly from one batch to another and, depending on the source, so too can viscosity. One survey of 380cst fuel oils supplied to a ship over a period of two years found the actual viscosity variation between 150 and 400cst. Fuel oils are usually residual oils blended with cutter stocks. These can be parafin based or kerosene based.
If you are experiencing variable efficiencies it may be that you need to look carefullay at the oil quality and tighten up the specification. What are acceptable variations in quality when it is supplied as a fuel oil may not be acceptable in your application.

 

[BRT549]

Thanks for the tip on viscosity.