The factors that affect the different levels of coke strength of seven kinds of coke produced fromseven single coals and one kind of coke from blended coal are studied. In the microstructure features of coke, the factors that have greater affect are the average wall thickness B of coke and optical heterosexual index H1. Microstrength is affected directly by the composition of optical organization of coke pore wall; the structural strength is influenced more greatly by porosity P and B, M40 and M10 depend mainly on B and H1,  except that CSR is influenced by pore wall thickness and optical organization of pore wall, it has a close correlation with the composition of ash. The greater influences on petrology and coal quality index parameter are Rmax, S, ∑I and G.

The principle, main desulphurization process and actual application of the desulphurization by ammonia are described. Practice shows that the desulphurization by ammonia for large capacity boilers is characterized by high efficiency, less investment and less electric power consumption, and sulfuric acid or ammonium sulfate can be produced. Even if the temperature of flue gas is not reduced and it is sent directly into desulphurization tower, the higher desulphurization efficiency can be obtained. Through the comparison of many kinds of processes, a reference is provided for the selection of flue gas desulphurization technology for coal firing.

The coal blend for stamping coke oven is pre-treated in the fluidized bed equipment with coke oven flue waste gas as heat source and power source. Production application shows that the functions of coal blend moisture control and classification of fluidized bed type coal moisture control technology are obvious, after moisture control the moisture of coal blend is lowered by 2.2%, 1 474×104m3 return gas consumption is reduced, 8 750t of CO2 discharge and treatment of 20 000t of coking waste water are reduced, the production capacity of coke oven is raised by 5% and dust content in discharged waste gas is less than 50mg/m3.

 Analysis is carried out for problem of the higher temperature generated in the production space inside the top of 7.63m coke oven designed by UHDE in Germany and the method for the effective temperature reduction in the top inside the coke oven is narrated. The temperature in the top inside the coke oven is reduced from 950℃ to about 870℃ through adjustments of gas orifice plate and spray nozzle plate for regenerator, the gas consumption is reduced by over 15% in comparison with the earlier period of the commissioning and problem of graphite grown on the top inside the coke oven is solved.

The process of producing direct-reduced iron（DRI） with coke oven gas was introduced. The production of DRI with gas-based vertical furnace was characterized by large production capacity, low production cost, flexible and convenient production operation and friendly-environment, therefore HYL-ZR rectifying process was selected first. From the viewpoint of circulation economy,  to produce DRI with large volume of coke oven gas produced in iron and steel long flow production process instead of natural gas can form a new metallurgical process of iron and steel co-existed in long flow and short flow featured in our country, which was the transit selection of actual condition of iron and steel industry development in our country.       

The determination proposal and working principle for coal charge moisture for coke oven are described and the calculating model for actual coal charge moisture is given. The practical application shows that the result of coal charge moisture gained through the treatment with the model is accurate and can meet the requirement of process. The coal charge moisture control module provides reliable data for the optimized control system for coke oven heating.

The experimental research and industrial practice on deep treatment of coking effluent with microwave technology was introduced in the paper. The test showed: the comprehensive effect of treatment of start microwave flow is better than stop microwave flow, there exists non-thermal effect in deep treatment of coking effluent process of microwave technology with microwave oven, namely existence of two functions (instantaneous and continuous functionsp）,  the quality index of effluent from system is better than first class standard given in GB 8978—1996,  the quality of coking effluent after treatment meets the quality requirement of return water.  The microwave technology for treatment of waste water is the effective way of reducing fresh water consumption per ton of coke.                         

The method for the determination of trace sulfolane and thiophene in benzene by gas chromatography flame photometry is established. The chromatography conditions are optimized and the external standard method is adopted for quantitative method. The recovery rates of the method after adding titer range from 114% to 136%. Relative standard deviation is not greater than 7%. The determination of sulfolane and thiophene in benzene sample is characterized by high sensitivity, good reproducibility, high reliability and so on.

WSA wet acid making process is characterized by simple flow sheet, low operation cost, convenient operation and good environmental protection result and so on. The process has a very good adaptability for increasingly strict environmental laws and regulations. A general description is given to the process flow sheet and features of WSA acid making process of Haldor Topsoe in Denmark. Emphases are laid on the description of the relevant operation and control requirements needing attention in the production application. Meanwhile analysis and discussion are carried out in combination with the problems occurring in the commissioning and production of the acid making plant of Shao-steel Coking Plant.