Fabrication of porous geopolymers from coal fly ash and spodumene flotation tailings through a novel combined saponification/hydrogen peroxide process.

The objective of this investigation is to overcome the difficulties in fabricating cost-effective, eco-friendly porous geopolymers (PGs) by integrating Coal fly ash (CFA) and spodumene flotation tailings (SFT). This synthesis utilizes a unique blend of CFA and SFT in a 6:4 mass ratio, with specific attention to optimizing the pore architecture to improve the PGs' efficacy. Key parameters included a modulus of 1.

Study on the synthesis mechanism of sodalite, gismondine, and zeolite-P1 zeolite materials from ladle furnace slag and fly ash.

In this study, geopolymers were prepared using ladle furnace slag (LFS) and fly ash (FA), and hydrothermal treatment was then used to synthesize bulk zeolite molecular sieves with gismondine, zeolite-P1, and sodalite phases. The effect of the synthesis conditions on the crystalline phases of the zeolite molecular sieves was investigated by XRD. The results showed that the best zeolite molecular sieves were prepared with an LFS: FA ratio of 4: 6, a curing temperature of 40 °C, a curing time of 12 h, a sodium silicate modulus (Ms) of 1.

Synergistic effect of hydration and carbonation of ladle furnace aslag on cementitious substances.

Ladle furnace slag (LFS) can undergo hydration and carbonation reactions as cement. This article explores the effect of LFS hydration and carbonation reactions on cementitious substances at different temperatures and different LFS particle sizes, determining the effect of these varying conditions on the microstructure and formation mechanism of cementitious substances. The results show that in the early stages, CS and CS undergo hydration to generate C-S-H gel, which then undergoes decalcification and condensation to generate CaCO and Ca-deficient C-S-H gel; the hydration reaction and carbonation reaction promote and influence each other.

[Characteristics and mechanism of sodium removal by the synergistic action of flue gas and waste solid].

The carbon dioxide (CO2) in flue gas was used to remove the sodium in the red mud (RM) , a kind of alkaline solid waste generated during alumina production. The reaction characteristics and mechanism of sodium removal by the synergistic action of CO2 and RM were studied with different medium pH, reaction time and temperature. It was demonstrated that the remove of sodium by RM was actually the result of the synergistic action of sodium-based solid waste in RM with the CO2-H2O and OH(-)-CO2 systems.