Waste plastic is treated by conventional coking process,mixing into blending coal to produce metallurgical coke and high strength porous coke.When 4% waste plastic is blended,the quality of the coke which carbonized in common is same as that of the coke which carbonized by blending coal.10%~18% waste plastic is blended to produce I type porous coke with more than 70% drum strength and 50% reactivity.

 domestic tar-hydrogenation technology as well as the nature of tar self-produced by Jiu Steel Group,researches on the process routing,conditions,among other types of catalysts are studied and feasibility on the process of fuel oil made by Jiu Steel tar hydrogenation is analyzed.

To improve the yield rate of tar during coal pyrolysis,the pyrolysis process and principle of long flame coal with different grain size under different final pyrolysis temperature and heating up rate are studied by non-isothermal thermogravimetric method.The pyrolysis characteristic of long flame is analyzed at the heating rate of 20 and 100℃/min,and the pyrolysis kinetic parameters are worked out.The result shows that  when the coal particle is smaller than 2.8mm,grain size of coal has little effect to the pyrolysis process; the volatile matter yield rate in the final solid product decreases while final pyrolysis temperature increases; and the separating out rate of volatile matter increases with heating rate.At the same heating rate,the relationship between activation energy and pyrolysis temperature can be expressed by a curve which increases firstly and then decreases.The pre-exponetial factor increases with activation energy.