Effect of fluorine and chlorine on slag melting characteristics: Experimental study and simulation by neural networks

► Compounds of slag of hazardous wastes are investigated by XRF and aided by FactSage. ► Na2O decreases the fusion temperatures sharply. ► The effect of NaF on the melting characteristics is complex. ► Prediction of fusion temperatures are obtained by neural network. ► The prediction results are verified by testing.