配煤对降低高灰熔融性煤的三元相图分析

Analysis of Coal Ash Fusion Characteristics of High Fusibility Coal Blending with Low's with Ternary Phase Diagram

采用2种低灰熔融性温度煤对一种高灰熔融性温度煤进行配煤降低煤灰熔融性温度的研究。依据相平衡理论分析了配煤降低高灰熔融性温度煤的熔融特性。研究表明:配煤可以有效的降低高灰熔融性温度煤的灰熔融性温度,其灰熔融性温度变化并不与配煤比例成线性关系,而与相应的三元相图液相线温度具有很好的相似性,三元相图同样适用于混煤灰的熔融特性研究。在相图的三元低温共晶点和二元共晶线附近灰的熔融温度随灰成分的变化比较显著,且低于周围灰成分的灰熔融性温度,相图理论可以很好的对配煤降低高灰熔融性温度煤的灰熔融性温度进行理论分析。

The coal ash fusion characteristics of high fusibility coal blending with two low fusibility coals respectively were studied and the result was analyzed by ternary phase diagram. The results indicate that the ash fusion point of high fusibility coal can be reduced effectively by coal blending. The trends of ash fusion point for two blended coals were not linear with the proportions of adding coal, but mirrored by changes in the liquidus temperature from ternary systems. The ternary systems are not only suitable for single coal but also for coal blends. The melting points of coal ashes that their components were closed to boundaries between regions or triple points were lower and changed more evident than those fare away from the boundaries between regions or triple points. Ternary systems can be well analyzed the melting behaviors of blending coal. The results of experiment were agreed with the theory analysis by using ternary phase diagrams.