Synthesis of ferronickel slag-based geopolymers

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Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate (2012, background): “The RKEF process is considered to be energy intensive for producing ferronickel from laterite ores as it involves several hightemperature steps, such as calcination and pre-reduction at 850– 1000 C in a rotary kiln, followed by smelting at 1500–1600 C in an electric furnace for separating ferronicke”
Expansion due to alkali-silica reaction of ferronickel slag fine aggregate in OPC and blended cement mortars (2016, background): “Safe disposal of the slag is considered as a major issue for the 36 ferronickel plants worldwide [2].”
Value added utilization of by-product electric furnace ferronickel slag as construction materials: A review (2018, background): “Due to the presence of a significant amount of amorphous silica, finely ground FNS has shown reactivity when used with Portland cement or with an alkali in geopolymers (Maragkos et al., 2009).”
Thermal insulating foamy geopolymers from perlite (2010, background): “…amorphous silicate and aluminosilicate raw materials (Panias et al., 2007; Maragos et al., 2008; Dimas et al., 2009; Xu and van Deventer, 2000; Palomo et al., 1999) to useful products with high added value (Panias et al., 2007; Maragos et al., 2008; Dimas et al., 2009; Palomo et al., 1999;…”