利用气煤和焦粉制备优质铸造焦的研究

针对中国主焦煤资源短缺而气煤储量相对丰富的资源特点，采用气煤为主焦化煤种，配用焦粉做瘦化剂，并添加一定量的沥青作粘结剂，通过系列配煤方案制备铸造型焦，获得可制备一级铸造焦的优化配煤方案为45：50：5。实验结果表明，随着气煤和沥青配入量减少，焦炭的M40提高，气孔率Ps降低，焦炭显微结构越趋向于致密化。在实验配比条件下，沥青添加量降低对于焦炭强度提高的影响较气煤显著；而气煤配比减少对于焦炭气孔率降低的影响较沥青显著。

Preparation of the foundry formed coke by gas coal and coke powder

Based on the relative abundant occupation of the gas coal in the coking coal reserves of China, the gas coal was used for the main coking component and the coke powder as the leaning agent, by the addition of pitch binder, various of coal blending schemes were investigated to obtain a first-level foundry formed coke in the optimal mass ratio of 45：50：5. The results showed that the crushing strength and the porosity of the coke were improved by the reduction of the blending proportion of the gas coal and the pitch. And the effect of the reduction addition of the pitch on the coke strength was rather significant than the gas coal, whereas it exerted less influence than the gas coal on the coke porosity.