The relation between the coal blending for the cokemaking with stamping coke oven and coke quality and relevancy between stamping strength and coal blending are described. It is pointed that the base of coke quality is the quality of coal blending, no fundamental change occurs because of coal preparation, cokemaking process and so on; the cokemaking with stamping coke oven can use more gas coking coal that has low deterioration degree and high volatile matter, to produce a certain quality coke, for the coal blending for cokemaking with stamping coke oven, the proportion of caking coal can be increased in coal blending so as to improve coke quality, but the cokemaking with stamping coke oven with about same coal blending for top charge coke oven will lose its superiority and cause problem. The issues of height and width ratio, heating mode and coal charging de-dusting etc. need to be further explored in the production practice.

Experiment and study are carried out with SH-A strengthened denitrogenation and carbon removal process for the wastewater from the coal based needle coke production. The operation conditions and treatment result at various sections are discussed in detail. After treatment with the process, the various indexes of the wastewater can meet the national grade I comprehensive effluent discharge standard (GB 8978—1996）, the removal rate of NH3-N is up to the range from 96.3% to 100% and removal rate of COD up to the range from 92.4% to 94.2%.

The existing process and technology need higher requirement of synthetic gas raw material, which causes the slightly higher cost for the downstream products. The utilization technology for low cost synthetic gas, especially for nitrogen containing synthetic gas is studied. The new technologies for dimethyl enther making with synthetic gas, F-T synthesis, low temperature liquid phase methanol synthesis etc. are described. The problems existing in the utilization of low cost synthetic gas, such as nitrogen containing synthetic gas are pointed out and its application foreground is prospected.

Through the measurement of optical organization and thermal property of coke, the relationship between the optical organization feature and quality of coke after the addition of lean coal and meagre and lean coal is discussed. After the addition of lean coal and meagre and lean coal, the optical organization takes the fine grain inlay and medium grain inlay as the main, silk like carbon and fragment are relative more. The optical organization structure unit of medium size coke is more favorable to improve the strength of coke. Through regression analysis the coke quality prediction model is established and the coke reactivity index and post reaction strength can be obtained directly through the measurement of coke optical organization content.

The difference between microphotometer and quasi-microphotometer was introduced. The visual diaphragm system is the important component of microphotometer, it provides the necessary condition of light beam injected vertically and horizontally, its locked measurement limit area enables the reflectance light of vitrinite to be measured not influenced by interference of reflectance of vitrinite. The trueness and accuracy of the vitrinite reflectivity were ensured. Quasi-microphotometer is lack of microphotometer sight diaphragm system, which can’t provide light beam vertically and horizontally injected, it has no the function to lock vitrinite to be measured and Kerogen is not interfered by the surrounding splitter line, the reflectivity  to be measured has no objective reality.       

The new automatic control system for coal blending is described. Electronic scale is used to replace nucleon scale. In the process arrangement, weighing belt conveyor is eliminated. Coal blending is done through weighing result difference so as to reduce the intermediate link and can meet the technical requirement of coal blending. The system is operated smoothly, the qualified rate of coal blending is high and economic benefit is good.

The abnormal variation condition of process parameters such as coke discharge temperature, pre-chamber level and power generating capacity were introduced after dismantlement of the bell type distributor for 150t/h CDQ charging device at Jinan Iron & Steel Company. In combination with the production actual condition, the process parameters, mainly including the central and peripheral air distribution proportion, air-coke ratio and pre-chamber level, were rationally adjusted after dismantlement of distributor. 

The analysis of force suffered on 7m coke oven door proper was made by means of ANSYS finite element analysis software, which was beneficial to the improvement of oven door structure, material and manufacturing, especially for improvement of structural design at stress concentrated area, it has very high actual applicable value for lowering the damage probability of oven door. The result from analysis can provide scientific reference data and theoretical basis for oven door design and manufacturing.  

To identify the relationship model between coke oven flue temperature and regenerator temperature, the pre-treatment should be made on the identified data. Against the periodic influence on top of regenerator due to gas reversal, the treatment mode of regenerator top temperature compensation based on center-point method was given, the pretreatment necessity on temperature model identified data was analyzed. The center-point compensation method was used to compensate and treat local data, the expected effect was achieved.   

The different crude benzol hydro-refining and extractive distillation processes were compared, the factors of product quality, variety, recovery yield, energy consumption and investment were analyzed. In combination with the actual situation, the features of different crude benzol hydro-refining and extractive distillation processes were introduced. When constructing crude benzol hydro-refining system, many factors should be comprehensively considered, therefore low temperature hydro-refining process should be selected  firstly.                         

The problems existing in the wastewater system for biological dephenolization system are described. Through the modification of process, the volume of flotation anaerobic water absorption well is expanded and the problem of the high index of discharged water is solved. The excess sludge disposal process is explored by creating new process and good result is obtained in application.

The further treatment technology for coking wastewater and its application conditions at present in our country are described. According to the actual conditions of recycling coking wastewater, the problems existing in recycling coking wastewater are analyzed and the major problems are secondary pollution and equipment corrosion, and the pertinent improvement suggestions are made.

For the CDQ demineralized water system for No.3 and No.4 coke ovens of Jiu-steel, reverse osmosis system and mixing bed system are taken as the key equipment,  the fully automatic filter and ultrafiltration system are used as pre-treatment unit; the water making mode of macromolecule separation film and mixing bed is adopted and the produced demineralized water is high in quality; the pressure before the film is kept at low level ranging from 0.02~0.06MPa and ultrafiltration incoming water flow rate can be stabilized at about 70t/h. The problems occurring in the actual application of the demineralized water system and various kinds of improving measures taken are described.