The study and development process of the needle coke produced from coal in China are described. The basic theory, industrial test and production conditions of the needle coke produced from coal in our country are discussed. A stress is placed on the introduction to the raw material pretreatment, green coke preparation by delayed coking and production process for the needle coke produced from coal by rotary kiln calcination. The quality of the needle coke produced from coal and its applications in our country at present are evaluated objectively.

Long flame coal with the grain size of less than 0.2mm, coke fine and coal tar were mixed together according to a certain proportion to prepare the binder for briquetted coal to produce metallurgical coke. 10% of No.1 coal slurry binder and 8% of No. 3 coal slurry binder were blended respectively to briquetted coal production, by which briquetted coal with higher cold strength can be obtained, the compressive strength was greater than 100N/off, the falling strength was greater than 90%, which can meet the strength requirement of briquetted coal for coke-making in the course of production, transport and charging.

Against heat transfer issue of CDQ system, one-dimensional heat transfer mode in CDQ chamber and math model of circulation gas combustion at the outlet of CDQ chamber were set up, and the discrete and simulation calculation was made on them. The result showed that the math model set up was correct, it can be used as system simulation optimum operation and control basis. By means of the calculated result of the model, the responding relationship among the system circulating air volume, air volume introduced and steam generation volume of boiler were found, which was used to conduct off-line guidance for optimum operation of CDQ system.        

The small scale test, medium scale test and industrial experiment on the improvement of coke hot property result are done by adding passivating agent based on SiO2. The study result shows that coke quenching with direct spraying of 5‰ water solution of the passivating agent based on SiO2 has a good improvement function of CSR and has very small influence on the coke cold strength M40. The addition of the powder of passivating agent based on SiO2 into coal blend reduces the coke hot property greatly and plays a negative role. The addition of the water solution of the passivating agent after normal coke quenching has almost no improvement result.

Aiming at the many problems occurred during the production test run of PROven system, the Coking Plant of Masteel has done a series of optimizations of its design parameters during its actual application so as to make PROven system functions more perfect. The optimized PROven system has not only solved the gas escaping problem on site, but also shortened the automatic interlocking time of charging car and PROven system. This can avoid the misoperation of operator and increase the safety and reliability of production operation.

The pre-sulfuration of catalyst can improve the activity and stability of catalyst and prolong the service life of catalyst. The reaction principle of pre-sulfuration of catalyst for hydrorefining, the sulfuration technology used at present in industry and factors that affect sulfuration are described. The sulfuration methods for different kinds of catalysts are compared and the matters needing attention during operation are put forward.

Trace moisture was existed in pure benzene products produced from Benzol-refining unit of Litol process of Shanghai Baosteel Chemical Co., Ltd, which can influence the product quality. The dehydration experiment was conducted with ND adsorbent, the study of static isothermal adsorption, adsorptive kinetics of adsorbent, and dynamic adsorption of fixed bed on trace moisture was made. Experiment showed that the dehydration effect of ND adsorbent was better, the experimental result can offer a basis for commercial design.