Effect Of Flux On Fluidity Of Slag And Reactivity Of Coal Gasification

Two fluxes, ADC and ADM were added to the two diferent types of coal samples, Huaibei coalⅠand Huaibei coalⅡwith diferent percentage respectively. Effect of flux on the ash fusion temperatrue(AFT) and fluidity of slag were studied. The impact of mineral composition on the AFT and fluidity of slag is studied by XRD. The reactivity of coals with the addition of two fluxes were also analyzed in reducing atmosphere by quartz balance. The results were shown as follows:1. The AFT of two coal samples could be decreased remarkably to 1380℃by adding 6% of ADC or ADM . The impact of ADM on the AFT and fluidity of slag of Huaibei coalⅠand Huaibei coalⅡis better than that of ADC.2. A new method and device for testing slag fluidity is set up, which can directly describe the slag fluidity through the whole temperature range. The results show that the the fluidity of slag of the two coal samples could be improved with the addtion of fluxes ADC and ADM.3. In reducing conditions, the mineral transformation of two coal ash samples with the additon of ADC and ADM were studied by XRD at high temperature. The anorthite and albite were formed by adding ADC and ADM and the contents of the anorthite and albite increased with the temperature increase, which reacts with other minerals to form low melting eutectic.4.The fluxes and their impact on reactivity of the two coal samples in coal gasification condition was studied. The reactivity of coal samples with addition of ADC and ADM were carried out by Quartz balance. ADM showed better catalytic activity than that of ADC under the reducing conditions.The gasification reactivity of Huaibei coalⅠand Huaibei coalⅡwas improved by adding of ADM and ADC.5. In order to further study the reactivity of coal during coal gasification, a bench l scale coal gasification devices was designed based on the calculation of materail and energy balance.