Engineering and Technology Journal,
2007, Volume 25, Issue 0, Pages 143-158
AbstractThis research include extraction of nickel metal from residual of fired heavy oil
in electric power station, the residual were pretreatment by grinding and sieving,
the nickel concentrated by particle size.
Magnetic separation was also performed in order to get rid of iron that was in
heavy oil residual in the form of magnetite, and the results show the ability of
separating 86% of iron.
Vanadium was recovered from the residual by alkaline leaching method using
sodium hydroxide solution and this step resulted in the leaching 98.63% of
vanadium, also increasing nickel concentration to 16.27%.
Subsequently extraction of nickel from the residual was studied using the
hydrometallurgy method. The leaching of nickel from the residues was carried
out using sulfuric acid and the result obtained show the possibility of obtaining
the highest leaching ratio at acid concentration 3 molarity, temperature 100oC,
time of leaching 90 minutes and solid /liquid ratio 5 gm/l.
In order to recover H2SO4 from the pregnant liquid, ion exchange process was
employed using strong anion exchanger and the concentration of nickel increases
in the liquid resulting from ion exchange process by evaporation.
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