“…At an optimum condition of 15 % PKS charcoal exposed to 1000 • C in 60 min, 0.103 % of nickel and 3.58 % of iron were recovered from the nickel slag. In a similar study,Usman et al (2020) beneficiated iron and nickel from ferronickel slag using PKS charcoal. The study demonstrated that under optimal conditions of 15 % PKS charcoal, 60 min time duration, temperature of 1000 • C and in the presence of 10 % NaCl, a yield of 5.98 % of iron and 0.153 % of nickel was practically feasible.…”