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通过偏光显微镜观察了石油系油浆 (LH)与煤系闪蒸油 (SN)焦化后所得焦块的光学结构。结果表明 ,在较宽条件下两种原料单独焦化均得不到取向度高的流线型结构。将两种原料以一定比例混合后先热解再焦化所得焦块的光学结构明显好于二者混合后直接焦化所得焦块的光学结构 ,其中LH和SN以 3∶2的重量比混合后在4 4 0℃、1MPa下热解 3.5h然后再在 5 30℃、1MPa下焦化 8h所得焦块为具有较高取向度的流线型结构 ,适合于作为针状焦的起始原料
The optical structure of the coke obtained from the coking of petroleum-based slurry (LH) and coal-based flash oil (SN) was observed by polarized light microscope. The results show that under a wide range of conditions, the coking of the two raw materials alone can not obtain a streamlined structure with high degree of orientation. After the two raw materials are mixed in a certain proportion, the optical structure of the coke pieces pyrolyzed and then coked is obviously better than the optical structure of the coke pieces obtained after the two materials are directly coked, wherein LH and SN are mixed in a weight ratio of 3: 2 Pyrolysis at 40 ℃ and 1MPa for 3.5h and then coking at 5 ℃ at 30 ℃ and 1MPa for 8h. The coke block was a streamlined structure with higher degree of orientation and was suitable as a starting material for needle coke