Abstract:

 Based on comprehensive analysis of the modal composition of a pseudoleucite syenite ore collected from the Zijin Hill of Lin County, Shanxi Province, we carried out a thermodynamic analysis of pseudoleucite syenite sintering process with sodium carbonate as the additive. It indicates that when the pseudoleucite syenite was sintered at 760880 ℃ for 1015 h, with the sodium carbonate as the additive, the decomposition rate of minerals in the pseudoleucite syenite could reach 971％. The thermodynamic calculation shows that it needs to consume 065 t of Na2CO3 in treating pseudoleucite syenite ore per ton, and about 95％ Na2CO3 could be recycled. This process consumed (229248)×10-6 kJ of heat energy, corresponding to 1909720682 kg of standard coal and the thermal efficiency was 40％; the CO2 emission is 077081 t. Compared with the Russian limestonesintering technique, the consumption of natural mineral resources and energy, and greenhouse gas emissions in sodasintering technique could be reduced by 65％, 63％ and 65％, respectively. Therefore, the procedure suggested in this paper has broad prospects in industrial applications for its economic benefits and environmentalfriendliness.

Key words:

Key words: insoluble potassium ore; sintering reaction; thermodynamics; sodasintering technique; limestonesintering technique