This paper introduces the features of 7m top-charging coke oven battery and the technology of combination combustion waste gas circulating and multistage heating combustion，batter proper structure，coke oven machinery，process equipment，intellectual control technology and environment protection.7m top-charging coke oven battery has the advantage of advanced process equipment and high level environment protection.Coke produced by 7m top-charging coke oven battery can meet the requirement of large scale blast furnace.

This paper introduces NOx discharging conditions and NOx formation mechanism，makes a conclusion for the study development of low NOx combustion technologies such as waste gas circulation combustion，air classification combustion，fuel classification combustion，high temperature air combustion，bias combustion，low NOx combustor and catalytical combustion.It points out that future study will focus on low NOx combustion of COG.It is very hopeful to realize high efficiency and low pollution combustion of COG by combining low NOx combustion technology and traditional combustion mode of coke oven battery and boiler.

This paper describes the research and application in coal blend technology for need of large capacity blast furnace.The coke quality can be assured by various kinds of solutions，such as further classifying coal kinds，rationally evaluating coking coal behaviors，optimizing coal blending and logically arranging storage，etc.to be used for large-capacity blast furnace production.

Maceral and microlithotype of seven coking coal samples，and the microstructure of their corresponding coke are analyzed.It is found that well distributed mineral is good to coke forming，while lump or large particles of mineral have bad effect to coke forming.Coking coal with high ash content and fat coal，if with high proportion of carbominerite and low minerite，have good coking property，and can be used as blends for coke production.Comparatively，the proportion of carbominerite in gas coal and lean coal has little effect on their coking property.

This paper introduces an innovation for increasing the heating level of coke oven battery from 1 210mm to 1 650mm as a solution to the problems due to the excessively high temperature of the free space of 7.63m battery.The temperature of innovated free space can be stabilized below 850℃ so that the coal categories for large-capacity battery cokemaking can be diversified，by-products production and quality can be improved and the operation of methanol-making from COG remains stable.

This paper introduces current tar adding process and existing problems.New tar adding process with the advantage of simple process，less land occupation，convenient maintenance，and less investment has been developed and used for over 3 years.Totally 8 760t tar has been added.The economic benefit of this process equals to 12 264 000 Yuan if converted to coking coal.

Based on the quality characteristic of Indonesia coal，the oxidizing deterioration rule in different environments is studied.A reasonable service life of Indonesia coal is concluded.Anti-deterioration measures are provided and applied in practical operation.This is a profitable research and practice for expanding coking resources.

The CDQ boiler feed water treatment processes in China at present are described in this paper according to quality required for feed water into CDQ boiler and demineralization of mixed bed and EDI are particularly compared in terms of advantage and disadvantage，which can be used by endusers for reference and decision-making.

Coke oven machinery positioning and interlock is an important technology for safe operation of coke pushing as described in this paper that the interlock and automatic traveling of coke oven machines can be controlled by using the technologies of coding cable positioning and spread spectrum communication.The full automation of the coke oven machinery can also be available by adopting the existing automatic control unit.

Proximate analysis，vitrinite reflectance analysis and coking analysis of meager lean coal，and its coal blending coking experiment and application on 20kg coke oven battery show that qualified coke can be produced with appropriate blending ratio of meager lean coal.

The inner wall of the ring duct broke and collapsed in the CDQ of Xuan steel coking plant.Analysis shows that the main reasons for the collapsing of inner wall are that the brick itself has defect，strength of fire resistant mortar decreases，and temperature and pressure in the duct are not stable for a long term.To prevent overall collapsing of the inner wall，the broken places have been repaired in time.At serious crowning places concrete supports were cast.On the whole，the CDQ is in good running state after repairing.

This paper studies the process conditions for preparing briquetted active carbon by non-caking coal and gas coal，and discusses the absorption property of active carbon.Experimental result shows the optimum process conditions are: coking temperature 550℃，constant temperature time for coking 30min，activating temperature 900℃，activating time 4h.The iodine adsorptive value of briquetted active carbon is up to 1 041mg/g，and methylene blue adsorptive value up to 190mg/g.These two values meet the requirement of industrial production.

This paper introduces the places which are vulnerable to form coke during gas phase crude benzol hydrogenation under low temperature.Coke jam condition can be evaluated from process parameters.This paper also analyzes the reason for coke forming，and provides treatment measures.The progress of coking can be greatly moderated by adding pretreatment device and polymerization inhibitor and strengthen production management.

Four factors affecting the sedimentation performance of coal pitch are respectively analyzed in this paper with coal pitch as feedstock and with aromatics and aliphatic hydrocarbon as extractant by process of solvent extraction-standing sedimentation so that the sedimentation behavior of coal pitch can be evaluated quickly and accurately.The result shows the appropriate working conditions as aromatic lipid ratio 1∶0.6，solvent to feed ratio 1∶1，treatment temperature 130℃ and sedimentation time 4 hours，which is characterized with convenience，being quick，rationality and low investment.

Compared the simulating result with product index，it is verified that the process of crude benzole negative pressure distillation by tube furnace is feasible.This essay studies the aspects of heating schedule，energy structure and environment effect.The result shows that crude benzole negative pressure distillation process is easy to operate，optimizes energy structure，and reduces discharging of waste water.

This paper represents the newly introduced WSA acid-making process which is characterized by simple process flow,being environment friendly,low operation cost and satisfied economic benefit,etc.,mainly with descriptions of the process philosophy,process flow and advantages & disadvantages.Innovation has been done for the defected process and the innovated WSA installation can be proven in long-term and stable operation.

This paper analyzes the factors affecting the quality of modified pitch by adopting several improvements and optimized processes with aims at an upgraded modified pitch quality, increased production and an prolonged service life of the equipment.

The methanol is an important organic industrial chemicals, which can be synthesized from H2, CH4 and CO rich in the COG and LDG as described in this paper. This utilization will benefit the environment and energy saving.

As advanced raw water pretreatment technology,the high efficiency coagulating sedimentation water purification technology has the advantages of less investment,high efficiency,and low operation cost.Taking the raw water treatment system in Shanxi Huangling Coal & Coal Chemicals Co.Ltd.as an example,this paper systematically introduces the working principle and process of this technology,analyzes the running condition and economic benefit by comparing this technology with traditional process,settling pond process and foreign high efficiency process.

Granular packing and structured packing are introduced in this paper and technical data of the gas-liquid redistributor is analyzed，such as design requirement，spray density，calculation，structure，etc.The overflow type redistributors are turned out to be more adaptable，esp.for high flow rate operation.

The paper describes the collection of off-gas pollutants by ECS system from gas purification plant to gas scrubbing system for absorption treatment, including the innovation of reliability of the ECS system. It also introduces the process flow regulating principle and control philosophy of the ECS which comes up with a solution to the pollutant in gas purification process so that energy-saving and emission-reduction can remarkably be achieved.