Abstract:

b value of coals with two different blending ratio was measured by Audibert-Arnu dilatometer, the optimal blending ratio was calculated by mathematical method, and the optimal blending ratio was proved by the coking test in laboratory. The results showed that the optimal blending ratio of two kinds of coals measured with Audibert-Arnu dilatometer in combination with mathematical method was basically correct. But for some low and middle rank coals with less inert matters and higher volatile matter, when blending it existed abnormal law and phenomenon. This method could also be applicable to calculate the optimal blending proportion of three or more kinds of coals, but the tolerance might be increased.