Abstract: The present situation of the coking industry in China and the requirement of blast furnace macro-scale operations technology on coke quality were introduced, the active factors and un-favorable factors confronted for the development of independent coking plant in China, the development strategy that the independent coking plant should be combined with upstream coal mine and extended with downstream iron and steel enterprises. The independent coking plant should strengthen strict management, lower the cost, save energy and reduce thedischarge, comprehensively utilize coke oven gas and enhance economic benefit.       

The requirement of gasification with gas flow bed on coal quality was introduced, the influence of coal moisture, reactivity, size and ash on gasification was described. The study showed that water in coal was the main factor to determine coal slurry property, the sticking temperature curve of ash slag had more instructive significance than ash fusion point in the operation of gasifier, to select coal which had flat ash slag viscosity variation in the operating temperature area was beneficial to the safe and stable running of gasifier.          

The laboratory crucible cokemaking test was made with 56 kinds of coals for cokemaking in WISCO, the sulfur conversion relationship between coal and coke was studied so as to lower sulfur content in coke and to rationally use coal. The results from study showed that as for single kind of coal for cokemak?鄄ing, the sulfur conversion rate (ΔS ) between coal and coke was lowered with the increase of volatile matter （Vd）, it had better correlation; the proportional factor (ΔS/K ) between sulfur in coke and sulfur in coal for coking was increased with the volatile matter （Vd）. Whether it was the single kind of coal for coke making or coal blend, their sulfur in coke was increased with the increase of sulfur in coal for cokemaking, and it had good correlation.

Through 40kg small coke oven test, the relationship between coal petrographic indexes (CBI and IS) and coke indexes M25 and CSR is studied. The test shows that the relativities between the average reflectivity R and mechanical strength M25 and CSR are obvious. The coal petrographic index can not only predict the mechanical strength and CSR of coke, but also can make it approach optimized coal blending ratio through the adjustment of CBI value. In order to reduce the using amount of major coking coal and lower the costs of coal blending and cokemaking, a new way is developed.

The main problems and causes existing in the cokemaking with stamping coke oven are analyzed, the  corresponding improvement measures and the problems which are to be solved are put forward, and the experiences on the improved operation control of the cokemaking production with stamping coke oven aresummarized. The operation result after improvement is good, the cake stamping time during normal production ranges from 7~8 minutes/cake and operation time ranges from 17~18 minutes/oven.

Against the identification issue of the correlation model between coke oven flue temperature and regenerator top temperature, a model identification method based on least square method with pre-estima?鄄tion of confidence interval was put forward. This method can effectively eliminate the effect of gas reversal on different trends of flue temperature and regenerator top temperature. By using pre-calculation of confi?鄄dence band, the issues of the correct fitting data brought by compact identification data and incorrect physics meaning can be avoided.    

Coke powder is utilized as emaciating agent and mixed in coal during coal blending for cokemaking. This not only solves the coke powder sale problem and reduces environmental pollution, but also saves large amount of lean coal to realize the secondary utilization of energy. The applications of coke powder preparation processes and technologies in production are described. The five coke powder preparation processes of dry process, wet process, lubricating grinding, vibrating rod mill and high pressure roller mill are narrated respectively and the advantages and disadvantages of the five coke powder preparation processes and equipment are analyzed and compared.

The further treatment process of waste water with nanofiltration membrane was introduced in this paper, the study of coking effluent further treatment with nanofiltration membrane showed that nanofiltration membrane is characterized by stable, safe and reliable running, high water production yield, less concentrated solution quantity, about 50% of desalinization ratio, high entrapment rate to COD, <50mg/L COD produced in coking effluent, which can meet the requirement of make-up water for circul- ating water, the reused water of coking effluent can meet the process requirement, and it is economic and feasible.  

An introduction is given to the process flow, process features and key point control of AS gas desulphurization and the existing problems and ways for improvement are pointed out. In the process, the ammonia scrubbing of gas is combined with desulphurization and ammonia is used as heat source to make desulphurized solution regenerate and increase the free ammonia content in desulphuring lean solution. AS gas desulphurization process has higher desulphurization efficiency.

High purity hydrogen can be separated from coke oven gas by pressure swing adsorption technology. The technology has become the dominant technology for the hydrogen separation from coke oven gas because of its simple process, less investment and convenient operation. The production process and working principle of hydrogen making with coke oven gas are described, the features of plant are evaluated and the problems occurring in the operation are analyzed. Meanwhile the corresponding handling measures are put forward.

One high-efficient degrading strain which took pyridine as only carbon source and nitrogen source was separated and screened from activated sludge of coking effluent of WISCO, the influence of the factors such as pyridine initial concentration, inoculum size, pH value, temperature and metal ion on strain degradation property was studied. The test results showed that this strain had stronger resistance on pyridine, which can be 1 200mg/L. The suitable condition for pyridine degradation was 30℃, pH 7.5 and inoculum size 5%, if suitable Fe2+ was added, the pyridine degradation could be promoted.           

Each content of components of three-fraction mixed oil is determined with capillary gas chromatography. The simulative distillation data of three-fraction mixed oil are obtained according to the linear relation of the chromatographic result and distillation result. The determined result has good accuracy and precision. The total time of analysis does not exceed 20 minutes. The method can substitute for distillation method for the determination of the initial boiling point, final boiling point and naphthalene content of three-fraction mixed oil.

The process flow and features of tar distillation processes in China and foreign countries are discussed. The process flow and features of the newly developed tar distillation are described. Through comparison, the superiority of the new process is showed. The tar processing capacity of one set of plant can be up to 500 000t/a, and the macro-scale operations technology, energy-saving and energy consumption reduction are realized. The new process has the value of popularization.