Effects of Fluxes on Fusibility Temperature of Briquette Ash
CUI Guo-xing NIU Yu LIN Ming-sui
Department of Chemical and Biological Engineering, Sanming University Department of Chemistry and Biology Engineering, Sanming College Department of Chemical and Biological Engineering, Sanming University
Abstract：The additive of Fe2O3, MgO, CaO or solid water glass was blended with briquette ash at different proportions, respectively, as flux. The briquette ash fusibility temperature was studied under the condition of weak reduction atmosphere to lower its melting temperature. The results show that its fusibility temperature can be lowered by blending with alkaline oxides efficiently due to the fact that mineral matters react with alkaline oxides and produce low melting eutectic matters. The decrease of ash fusibility temperatures by adding the same amount (11%, w) of flux follows the sequence of MgO, CaO, solid water glass and Fe2O3, and the flow temperature is lowered by 22.0, 58.8, 81.2 and 91.9℃ respectively. Ternary phase diagram and XRD analysis were used to examine the effects of each flux on briquette ash fusibility temperature, verify the existence of mineral crystals, which is well coincided with the experiment results. The suitable adding quantity of CaO, solid water glass and Fe2O3 flux is 11%, 9% and 9% respectively, and CaO and solid water glass with both adhesive and accelerating gasification properties are found to be better fluxes of briquette ash.