By gravitational decantation and centrifugal separation treatmentm,the mass concentration of quinoline insoluble(QI) in coal tar is less than 0.

• 以煤焦油为原料；通过重力预沉降、离心分离处理；制备出优质的针状焦生产原料；煤焦油中喹啉不溶物(QI)质量分数<0。