The achievements in the coking industry in China with respect to scale,technology innovation,energy saving and emission control and industrial chain construction are discussed.The development trend of coking industry in the aspects of production and consumption,further treatment of gas,energy saving and environmental protection during the 13th Five-Year Plan period is analyzed.Relevant recommendations are proposed in this paper.

Vitrinite reflectance and standard deviation of 28 individual coals were tested automatically and manually. The reasons for the different results between the two testing methods were analyzed. Relevancy fitting was made for the test results, and it was found that the both values showed obvious linear relationship. The relevancy of vitrinite reflectance is higher than that of standard deviation.

Statistical method is adopted to study the relationship between the coke fine recovery rate under blast furnace trough and consumption of coke stored on the ground,coke transfer and average grain size,so as to determine the key factors influencing the average grain size of metallurgical coke. The result is taken to guide the production operation of coke oven battery and optimize the storage and transfer of coke. Coke fine recovery rate under blast furnace trough can be reduced and the average grain size of charging coke is improved.

The relationship between main indexes of coke was studied based on long time collection of coke quality inspection data.The result shows that the smaller the screened coke grain size，the higher the moisture content；sulfur content is linear with ash content；for coke with same initial grain size and conveyed via same transfer route，coke breeze content increases as M25 decreases.

To study the influence of screened grain size of coal blend on coal quality,4 sampling coals were selected at random,with each divided into 7 batches of different grain size,to analyze the ash content,volatile content,thickness of plastic layer,caking index and sulfur content.The influence of screened grain size of coal blend on coal quality was observed by comparing the results with normal analysis data.

The indexes of domestic high sulfur coking coal containing 2% sulfur were analyzed.Study on optimizing the blending of domestic high sulfur coking coal and imported low sulfur coking coal was carried out with a 40kg pilot coke oven battery, and industrial test was carried out in 6m top charging coke oven battery.The result shows that a blending ratio of 6.5%～8% can be obtained, and coal blending cost can be reduced by 5～10RMB/t after optimized blending of domestic high sulfur coking coal and imported low sulfur coking coal.

This paper introduces a special device monitoring the coal cake shrinkage during coal cake carbonization process.A new method was deduced to analyze the reason for high pushing current.By means of this new method,the heating conditions or coal blending ratio can be quantitatively analyzed,estimated and optimized.Therefore,the purpose of stabilizing production,reducing coking heat consumption and maximizing battery life can be realized.

Through analysis on coke cake center temperature,cross wall temperature coefficient,end flue temperature coefficient,bottom pressure in coking chamber and heat consumption for coking,it can be concluded that the current thermo-tech conditions of coke oven meet the requirement for maturing coke.Optimization on determination of standard temperature,adjustment of cross wall temperature,control of end flue temperature and GC main pressure has been proposed to continuously improve the heating conditions of coke oven battery.

The influence of temperature and space during coking process on tar recovery is studied.The result shows that temperature and clear space are very important to the recovery rate of tar.The hot strength of coke is in proportion to the recovery of tar to a certain extent.

Regarding to the problem of environmental pollution caused by smoke escaping during coal charging of JNDK 43-99D stamp-charging coke oven,modification was made for the existing de-dusting device.The technology of smoke guiding with U tube was adopted to control the charging emissions.

Regarding to the SOx and NOx contained in coke oven flue gas,an integrated wet desulfurization and denitration process and structure combining the processes of flue gas waste heat recovery,wet super turbulent ammonia desulfurization and forced oxidation of urea denitration is proposed.With application of this new technology,the discharged coke oven flue gas can meet the standard requirement after desulfurization and low temperature denitration,low pressure steam and ammonia sulfate are produced as by-products,escaping of ammonia can be avoided and no waste water or slag is discharged.

The reason for the low lateral temperature coefficient of coking chamber No.52 of 7.63m coke oven is analyzed.The corbel zone of coking chamber is cleaned under hot state.After cleaning，the lateral temperature coefficient is improved greatly.The coke oven battery gets back to normal production，and the problem of environmental pollution is easier to control.

Slurry based fuel oil can be obtained by adding appropriate portion of petroleum coke fines,stabilizer and viscosity reducer into the mixture of pitch and anthracene oil.The influence of adding ratio of stabilizer and viscosity reducer,and grain size and content of petroleum coke fines to the performance of slurry based fuel oil is studied.

This technology is used to homogenize the coal tar pitch from different origins in proportion.With homogeneous coal tar pitch as raw material,the needle coke production system runs smoothly,product recovery rate is high,less solvent is consumed,and the coke quality is stable.

As crude benzole recovery rate is low,the factors affecting the crude benzole recovery rate are analyzed. Improvement measures such as reducing the resistance of benzole scrubber,increasing circulating wash oil flow,reducing the absorbing temperature of benzole scrubber,increasing reflux of crude benzole still and improving the quality of circulating wash oil,have been taken to improve the crude benzol recovery rate.The average crude benzole recovery rate is improved to 0.91% from 0.8%.

This paper studies the selection and proportioning of azeotrope former for refinement of 2-methyl quinoline by azeotropic distillation. The difficulty in separating and removing 8-methyl quinoline is solved，and 2-methyl quinoline with purity of 96.3% can be obtained.

Quality requirement on raw material and production process parameters for production of medium temperature modified asphalt without intermediate phase are determined through thermal polymerization tests with different raw materials.Qualified medium temperature modified asphalt without intermediate phase can be produced by adjusting tar distillation and asphalt modification parameters.

The reason for higher H2S content in the gas after benzole scrubber than H2S content in the gas after H2S scrubber is analyzed in this paper.Corresponding measures are proposed to reduce H2S content in the gas after benzole scrubber.

This paper introduces the principle,method,process and effect of acid-making tail gas purification with use of waste NaOH liquor.SO2,SO3 and acid mist contained in acid-making tail gas can be reduced to 40mg/m3 or lower.Nitric oxides are reduced to a large extent,which is a great benefit to the environment.

The traditional way of sulfur storage has the problems of pungent smell and high risk.Improvement has been made by providing rotary type flaker to deal with the liquid sulfur.As a result,the field environment is improved,while risk and labor force are reduced remarkably.

The difference of applying hot tapping and plugging technology on gas pipeline between plateau area and plain area is analyzed from the aspect of gas gravity diffusion.The application of hot tapping and plugging technology on the emergency repair and maintenance of industrial pipeline in plateau area is introduced in this paper.