This paper introduces the characteristics of stamp-charging coking technology,and describes briefly the development and technical improvement of stamp-charging coking technology in China.It points out the main problems existed in the present application in China,improvement measures and development direction.It is estimated that coke production capacity will be reduced to 360 million tons by 2025 in China,by which stamp-charging coke production will be about half of the total coke production.

This paper introduces the application on advanced technology of heat conduction,such as by using heat transfer oil,heat pipe,heat pump and surface evaporation type air cooling,etc.,which can improve energy utilization efficiency,reduce total energy consumption in the coking industry.The expediting popularization of the advanced technology of heat conduction plays an effective role in the energy saving and emission reduction in the coking industry of China.

This paper analyzed the mathematical statistics attribute of the coal vitrinite reflectance index and existing vitrinite deviations for judging coal rank and disadvantage of coal kinds,showing the advantages and disadvantages of various determination methods and expression index,with description of impact on the determination result by identifying vitrinite.The system errors among different determination methods not affecting the application of reflectance distribution has also been demonstrated.

This paper analyzed the behaviors of some overseas coking coal and described coal blending experiences in actual production,which is discovered with features of lower ash,low sulfur and individual coal kind and that some coal kind can be compared to the high quality coking coal in China.Furthermore the rational utilization of overseas coking coal in blending can dramatically cut the cost of coke due to rich coking coal resources and its market sensitivity.

Coal blending process and proportioning are determined by means of an experiment on coal blending with modified pitch through 40kg test oven owing to a sound caking property and low ash of the pitch before the coke oven test is done.As a result,the modified pitch is successfully utilized for the uninterrupted production of JN60 coke oven battery.The utilization of coal blending with modified pitch is beneficial to improvement of coke quality,expansion of the range of use and reduction of coke production cost.

Problems and causes during operation of CDQ system are described in this paper for large-capacity stamp-charge battery.Solutions are also given by properly increasing the diameter of CDQ chamber and the bottom area of primary deduster,by using high-efficiency secondary deduster and by improving the abrasion-resistance of CDQ blower for stable and uninterrupted production of the CDQ system.

This paper described the classification for each individual coal and coal behavior test,as basis for commercial test of coal blending.It also provided the concept of the test as well as the method.The commercial test method of coal blending is applied as coal blending ratio reference for cutting coal blending cost,optimizing coal blending structure,improving coke quality and satisfying the demand to the maximum extent for blast furnace production.

This paper described the application of stamp-charge battery coke in 450m3 blast furnace production and analyzed the experiments in 2 650m3 blast furnace respectively with similar quality of coke produced from top-charge battery and stamp-charge battery.The result shows that the associated CDQ system for the stamp-charge battery can effectively reduce coke moisture and improve coke quality,which greatly benefits the BF production.

A ceramic welding technology is introduced in this paper for repairing the damaged carbonization wall surface,including the welding equipment,repairing compound properties,preparation,operation procedures and the hot work control etc..The case shows that the welded wall surface appears flat and smooth,with improved oven proper conditions,such as better compound  binding performance, less pushing resistance,lower pushing current and uniform distribution of graphite on oven wall.

This paper described a new type compound inorganic castable as monolith-cast oven door lining replacing the conventional bricklaying,which shows that the temperature of external surface of the oven door drops by 45~50℃,with slight temperature rise at oven end and with remarkable advantages such as increasing coke oven capacity and thermal efficiency,easy for erection and maintenance as well as improving operating condition,etc..

The paper presents the function of pusher & coke side operating benches and explains that cross-range expansion of the coke oven proper has an effect on stability of the operating benches.Comparing with three types of operating benches,selection proposal shall be provided for the operating benches of JNX70 coke oven and for other types of coke ovens for reference.

This paper described strain test on the RCC of main load bearing members of new coke oven battery for Phase IV of Angang.The test has been done at the stage of completion of battery proper structure construction, heating-up and after putting into production.The concept and its details of the structural test have also been given in this paper,which provides solid basis for an optimized structural design of the battery.

Sulfide is one of the common pollutants produced in coal chemical plants.There are several treatment methods,in which catalytic oxidation method is more often adopted for its low cost and good efficiency.However,this method has the disadvantages of slow reaction and escaping of hydrogen sulfide.First,select PT-OC01 catalyst as the best catalyst from three kinds of heterogeneous catalysts.Then conduct orthogonal experiment by taking the removing rate of sulfide and escaping rate of hydrogen sulfide as indexes to find out the best process conditions.The experiment shows that sulfur removing rate can reach 87.3%,and hydrogen sulfide escaping rate is 0.25% only.

The upgrading of waste water treatment process is described in this paper,aiming at the pretreatment system and bio-treatment system,i.e.the A-A/O process is replaced with A/O so that the waste water treatment can conform to national standard Gr.I.The advantages and disadvantages of the two processes as well as the impact factors during production are also analyzed.

The paper presents the method of power generation by coke oven gas and operational principle of gas turbine as well as its structure.Pre-posing processing system of coke oven gas and flue gas denitrification system are briefly described.It is proper way for power generation by gas turbine to make full use of coke oven gas.

This paper introduces the determination for desulfurized liquor discharge volume with SCN^- balance according to the HPF reaction mechanism and actual production,with optimized results,such as ammonium thiosulfate around 60~80g/L,ammonium thiocyanate around 120~140g/L and that the volume of the discharged desulfurized liquor can be controlled at 30~35m³/day.

The new final cooling process integrates gas cooling,naphthalene removal and reuse of condensate,so that gas can be cooled down step by step in gas purification plant.Taking the condensate from the upper stage of final cooler as the soft water used in ammonia stripping unit,coal water quantity in the coke oven gas purification plant can be reduced.Wash oil is used in the final cooler to remove naphthalene in gas.The naphthalene-containing wash oil is sent to benzol scrubbing unit for regeneration after heated and separated from water.

This paper introduces a new ammonia stripping process with heat transfer oil, a method of energy-saving,low pollution and consumption-reduction,replacing the conventional steam stripping process that gave rise to NH3 content fluctuation in the distilled water caused by tar jamming at raw tubes of reboiler,tray leakage and low efficiency, etc..Measures have been taken for stable operation of the heat transfer oil system which achieved good performance.

This paper briefly describes the process principle of HPF desulfurization,analyzes the problems in the running plant,and puts forward improving measures.It proves that the improved process is reasonable and practical.The desulfurization effect meets the specification requirement.

This paper introduces crude benzol vacuum distillation process,i.e.the feedstock directly enters the crude benzol column with high efficiency blockage-free trays,sharing one tubular furnace together with regenerator,which can be in flexible and reliable operation.Compared with direct atmospheric steam distillation,this process has advantages of energy-saving,environmental protection and stable operation.

This paper described a new pre-separation process for tar residue from ammonia liquor by combination of the tar residue pre-separator and mechanical ammonia liquor decanter,which shows  more features, such as  lower cost for the process equipment,higher separation efficiency,better operating condition and less labor intensity,as a solution to the problems of 7.63m battery at present.

Each reverse osmosis device can generate 60t/h demineralized water,but it needs to discharge 20t/h concentrated brine. In order to reduce discharge quantity of waste water,the equipment is modified,so that half of the concentrated brine can return to the feeding water of the reverse osmosis device.With this improved reverse osmosis process,the plant is running stably,the discharged water meets national standard,and 20t/h ground water can be saved.It’s an energy-saving and emission-reduction,environmental friendly and efficient process.