Effect of different reaction atmospheres on the sintering temperature of Jincheng coal ash under pressurized conditions

► The sintering temperatures decline markedly under all reaction atmospheres with the rise in pressure. ► The sintering temperatures measured under the reducing reaction atmospheres are lower than those for oxidizing atmospheres. ► The sintering temperature under the gasification atmosphere is close to those under the H2 and CO atmospheres. ► The sintering temperature under a N2 is lower than those under other oxidizing atmospheres.