The paper introduces the existing technology of flue gas desulfurization and denitrification for industrial application.Combined with the research on parameters and components of the flue in the coke oven,the paper offers the technology routes of coke oven flue gas desulfurization and medium\|low temperature denitrification,and presents the contents and results of pilot scale test on the flue gas desulfurization and denitrification,furthermore,the solution to the flue gas purification of coke oven is finally put forward.

The traditional coal blending coking theory could not adapt modern coal source conditions as it is established based on single type of coal.It is necessary to determine the caking and coking properties of coking coal according to Chinese classification principles of coal and reflectance distribution diagram of commercial coal,which could also identify the degree of mixed coal,correctly evaluate the property of mixed coal and its role in coking coal blending,and make appropriate coal blending scheme through coking in small coke ovens.The test shows that reasonable use of mixed coal in coal blending could reduce negative factors of mixed coal in coal blending so that coke of high quality could be produced which could meet the requirement of blast furnace production.

This paper comprehensively analyzes A type coking coal with methods of coal petrography reflectance detection,Gieseler fluidity measurement,coking test with single coal and coal blending coking test etc. The test shows that The G value,Y value and industrial analysis index of A type coal are similar with and even better than other coking coal of the same kind,but its micromaceral is abnormal,and the ratio between reactive and inert components is as high as 19.2,maximum fluidity is only 32ddpm,and the thermal intensity of the produced coke from the single coal is as low as 5.26%.

This paper introduces the new technology of the blast furnace blowing of biomass,blue-coke,and coke oven gas etc.Which can substitute the function of pulverized coal to some extent.Such technology remits the shortage of coal resources and reduces the discharge of fuel gas and trash as well as finds an efficient way of their resources utilization.

This paper mainly elaborates the application of coal petrographic analysis in identification of coal types and evaluation of mixed coal，guidance of coal blending，prediction of coke quality，guidance in reasonable sub-heap of coal sent to the plant and determination of optical texture of coke.The study shows that the vitrinite reflectance distribution diagram of coal petrographic analysis has obvious effects in identification of quality of coal sent to the plant and evaluation of mixed coal，which could optimize the coal blending scheme，stabilize coke quality and guide reasonable sub-heap of coal types.

On the basis of searching，organizing and summarizing the patents on coking coalpretreatment of Nippon Steel，essential content of those patents are analyzed，providing certain reference for the study of coking coal pretreatment technology in China.
Nippon Steel; Coking Coal; Pretreatment; Patent analysis

This paper analyzes the reasons for gain and loss of coal yard with systematic analysis on aspects including data collection,measuring scales,moisture,natural losses and statistics management details etc. to seek the reasons for deficient and excessive stock of coal yard,and proposes the effective measures and scientific adjustment methods for solving the problem.

This paper introduces several waste heat recovery methods in SITD coal moisture control system to reduce steam consumption in the system.The technologies of recovery of condensate flash steam in the system，power generation with hot water waste heat and utilization of coke oven flue gas waste heat adopted in the system can increase safety of the system and effectively reduce steam consumption.

Each pile of coal on coal storage yard is located by GPS positioning system, and the operation of each stacker reclaimer for each pile is accurately arranged through signal transmission.Such way can efficiently decrease the phenomena like piling the coal wrongly, or taking the coal in mistake, which is favorable to the management of coal yard and the cost decrease of blending coal.

This paper introduces the amendment status of standard GB/T 15591—2013 judging method for mixed coal type of commercial coal and the precautions for application of the standard,and it also discusses the determination method of vitrinite reflectance of commercial coal.
Commercial coal; Mixed coal type; Vitrinite reflectance

Regarding to the pushing current fluctuation along with the change of coal blending ratio,influence of coal blending structure to pushing current of stamp-charging coke oven is studied.Under the present heating system,to ensure stable pushing current,the blending coal should be controlled as follows:volatile matter ≤26.1,caking index ≥66.9,and shrinkage of coal cake ≥7mm.

This paper introduces a method for overall repair of the bottom bricks of coking chamber,and proposes a control plan for temperature management during repairing.Practical production shows that the repaired coking chamber has similar indexes with other coking chambers,and from which coke can be pushed out easily.Therefore,the risk of high temperature radiation to human body is reduced and the service life of coke oven is prolonged.

Based on actual production condition of coke oven,a series of measures were taken to deal with the problems of COG pipeline,resistance of coke oven gas main pipe,flow meter measurement and other factors affecting coking heat consumption.As a result,coke oven gas consumption was effectively controlled and reduced remarkably.

This paper analyzes the reason of burnt loss rate of the coke with dry quenching.The burnt loss rate decreases from 1.2% to 0.9% through controlling related factors of burnt loss rate.Calculated as per 1 million ton of coke production,1 000 ton of coke can be reduced each year,and more than 1million economic benefits would be created,as well as the service life and interval time of annual overhaul for the CDQ chamber would be extended.

This paper studies the reason for high coking heat consumption of stamp-charging coke oven. The influence of moisture content,coke oven top space temperature,and waste gas temperature was studied.Under the precondition of ensuring coke quality,measures such as adopting suitable coke cake center temperature and suitable excess air coefficient,enhancing the management of coke oven proper temperature,and strictly controlling the operation of coke oven were taken to reduce the coking heat consumption. The effect turned out to be remarkable.

This paper introduces two routes to produce liquefied natural gas from coke oven gas: cryogenic liquefaction route and methanation route.Comparison of these two routes shows that the better investment mode for now is to firstly establish a plant with cryogenic liquefaction route for the purpose,and then reconstruct a methanation plant on basis of the established cryogenic liquefaction plant when the catalytic synthesis reaction of methanation route proves to be mature and reliable.

This paper deeply studies ultra-large type atmospheric and vacuum tar distillation technology,and proposes innovations on vacuum pump and feeding location of 1# column.The atmospheric and vacuum tar distillation process at capacity of 5×105t/a in WISCO has advantages of large capacity,advanced technology,being energy saving and environment friendly and high recovery rate of product.

Blended with asphalt，heavy residual oil，instead of a portion of anthracene oil，can be made up qualified fuel oil.Such method not only expands the market of asphalt，but also reduces the cost of fuel oil preparation.The research process is divided two parts: laboratory scale，through which optimum ratio can be got;and pilot production，through which all targets of the pilot production meet the requirements.

This paper explains the energy saving principles and advantages of electric fan of large scale cooling tower,and introduces the design procedure,modification project,data calculation and analysis,and energy saving calculation as well as static payback time of mixed flow water turbine special for cooling tower instead of motor. After modification,energy-saving purpose is achieved.

This paper introduces the application of China-made PVDF composite membrane and new type external submerged membrane module in advanced treatment of coke plant wastewater.PVDF has avoided the problems of wire break and exceeding amount of suspended solid in discharged water on condition of ensuring the flux.The new type membrane module has advantages of less space occupation and higher automation level,and the discharged water could be directly reused or used as feed water for reverse osmosis membrane.

According to theoretical analysis and practical experience, when determining the amount of coke oven gas for handling in the design,major influence factors which need be taken into account are provided.Amount of coke oven gas shall be determined on the premise that the targets of gas purification are ensured, the economy and stability of the purification apparatus operation should be taken overall consideration.

This paper introduces heat pump distillation technology for coal water, which uses absorption heat pump to recover the waste heat of ammonia vapor at top of ammonia stripper with circulating hot water as the carrier,and the circulating hot water heats the waste water from bottom of ammonia stripper through reboiler; the generated low\|pressure saturated steam returns to bottom of ammonia stripper to supply heat,which has reduced the energy consumption of ammonia stripping.

This paper introduces the problems, reasons and improvement measures of AAO process.The biochemical system could avoid impact using emergency regulating pond to homogenize the raw water; dose floating packings to the aerobic pond to prevent swelling of sludge; dose flocculant to the oil removal pond for effective removal of total cyanide.