Abstract: The mineral distribution in pulverized coal directly affects the fouling and slagging of furnace and the formation of particulate matter. In this paper,the influence of mixed pulverization of two single coals on mineral distribution in coal blends was studied. Zhundong raw coal and Jincheng raw coals were crushed to below 3 mm,respectively,mixed and ground to less than 150 μm according to the mass ratio of 70 ∶ 30,50 ∶ 50,30 ∶ 70. The float-sink method with organic solutions was used to separate the pulverized raw coals and coal blends into different density fractions. The changes in density fraction,volatile matter content,maceral composition and chemical composition of coal ash were studied. It is found that the two single coals have strong interaction during mixed pulverization. The density composition of the coal blends is obviously different from the averaged ones of the two single pulverized coals. The density fractions,<1.5 g/cm~3 and>1.7 g/cm~3,in the three blended coals decrease,while the 1.5-1.6 g/cm~3 fraction significantly increases during mixed pulverization. Both volatile matter contents and microscopic observations indicate that Jincheng coal is concentrated in the <1.5 g/cm~3 fraction of the coal blends,and Zhundong coal is mainly concentrated in the 1. 6-1. 7 g/cm~3 fraction. The chemical compositions of the blend coal ashes are more uniform in different density grades compared with the two kinds of single coals. Mechanism analysis indicates that the different grindability of the two kinds of single coal is the fundamental reason for the segregation of pulverized coal composition.