The new national standard “Emission standard of pollutants for coking chemical industry”  regulates the requirement for control of NOx emission from chimney of coke oven battery.The technical measures on design of heating system of coke oven battery and treatment of oven flue gas after it is discharged from the battery for  control of NOx emission are expounded in this paper.The author also makes brief description of technology on denitrification of flue gas by using SCR process and suggests that in order to meet the requirement of the national standard for control of NOx emission from chimney of coke oven battery located in the “special region”, flue gas discharged from the coke oven battery should be further treated by using SCR denitrification technology with learning experience of Tokyo Gas gained from test of pilot plant and engineering.

The modification effect of gas-fat coal and fat coal was studies through common coking test mixed with these two kinds of coals and other single coals.The test result shows that the modification effect of fat coal is better than that of gas-fat coal.Based on the test,stamp charging experimentation with gas-fat coal instead of partial fat coal was carried out,which indicated that on the premise thatcaking property of blending coal is stable,as increasing amount of replacing gas-fat coal,coke strength after reaction first increased and then decreased,but the change of coke reactivity index was in the opposite way,and the coke strength in cold condition changed little.

This article analyzes the current application situation of coke oven flue gas as a heat resource of coal moisture control process（CMC） in China, focusing on its process and equipment by using of coke oven flue gas as a heat resource. Waste heat in coking plant is fully utilized.CMC has the advantages of simple process, less investment,flexible operation,lower running cost,conservation of energy and environmental protection.

Partial gas-fat coal,gas coal and 1/3 coking coal are replaced by mid-temperature respectively for cokemaking in laboratory.The result shows that the quality of coke is not largely affected if the proportion of mid-temperature is controlled within 3%,besides,mixing with low-priced anthracite with low ash and low sulfur can effectively control the cost of coal blending.

Mixing 40%~50% anthracite with blended coal,the formcoke reactivity index (CRI) is high while its strength after reaction (CSR) is low.After blending coal fines modifier (ZBS),thermal characteristics of formcoke were proved,which shows that ZBS modified anthracite.When mass fraction of ZBS reached 1‰,the mass of coke improved most,in which CRI decreased to 10.65% and CSR increased to 13.52%.

For requirement of high capacity blast furnace production, high quality of coke is required.To this end, by means of ingredient analysis,coal blending optimization,increase of local-produced prime coking coal consumption as well as development of non-coking coal resources,the coke quality can be stabilized,coal blending cost can be lowered and full utilization of the resources can be realized.

Configuration and control of bracing system for the first 6.25m stamp charging coke oven in China is introduced. After analyzing the stress and tonnage configuration of buckstay,the tonnage distribution for springs is renewedly optimized during heating-up and operating. Curvature of buckstay,clearance control between flash plate and buckstay are also elaborated.

The effect of CDQ process on qualities of stamp-charged coke and top-charged coke is analyzed by testing the coke’s M40,M10,CRI,CSR,pore structure and optical texture.The testing result shows that stamp-charging coke oven matched with CDQ process can improve the quality of coke as well as the proportion of weakly caking coal so as to save high quality coking coal.

The production equipment of 3# and 4# stamp-charging coke ovens in Panzhihua Iron & Steel Co.break down frequently,which need to shut down for maintenance.Some improvements such as the build-up welding of coal supporting plate,the modification of program for stamping-charging-pushing machine (SCP),the manufacture of movable track for coke guide,the amelioration of distortion correction for pusher ram greatly reduce equipment failure as well as miss-pushing rates caused by the failure.Stamp-charging battery; Equipment; Shut down for maintenance; Improvements

In view of the affect of using rich gas and lean gas heating to the production process, this paper proposed a solution of additional heating with twin flue for improving oven end temperature which would improve uniformity coefficient of oven end temperature, ensure uniformity of the entire oven, guarantee mature carbonization of the coke at oven end and that of the entire oven as well as prolong the service life of the battery.

According to the damage of CDQ connecting duct in China and the features of CDQ bricklaying in Phase Ⅳ of coking project for Baosteel, new technologies have been put forward, such as three-segment expansion joint, silicon nitride and silicon carbide bonded brick, precise-position at center of connecting duct as well as accurate elevation and inner diameter so that the CDQ connecting duct bricks can be laid in good quality and the service life of the CDQ chamber can be extended.

CGT with MN pipe on oven top and sealing device of oven door on pusher side are introduced.Negative pressure is produced partially inside goose pipe by high-speed injection of high pressure ammonia liquor.Raw gas produced by coal charging is sucked to collecting main for reusing under the action of the negative pressure,which controls fume emission from oven end and top and has better environment protection and economic benefits.
CGT with MN pipe; Sealing of oven door; High pressure ammonia liquor;

Combining with the current situation of domestic oil shale resources，the domestic distillation method of oil  shale processing as well as its perspective is analyzed.Proper processing technologies shall be used for various kinds of oil shale.The development of a complete set of technique and equipment for oil shale distillation is the direction of oil shale industry in China.

Solubilities of anthracene in DMF,benzene,toluene,benzene-DMF,toluene-DMF and water-DMF were determined at 303.45 to 353.55K by equilibrium method. These solubilities were correlated by empirical equation,ideal solution equation and λ-h equation,which provides important phase equilibrium data for development of refined naphthalene preparation by use of new solvent extraction crystallization process.

This article analyzes current situations of applications for coke oven gas and liquefied natural gas (LNG) respectively,and summarizes their technical features at home and abroad.A process of LNG made from coke oven gas by ACRE is introduced,indicating that the technical core is not methanation, but the process of deep purification.

The corrosion at different temperature and medium of pre-evaporator in crude benzene hydro-refining process is studied in this paper and protective measures are taken accordingly in design,such as material selection and proper operation,etc.,which could minimize the corrosion in the pre-evaporator and maximize the service life of the equipment.

The corrosion mechanism in process of coal tar refinery is studied in this paper and the corrosion is analyzed which should be paid highly attention to during production. A practical solution is therefore proposed against corrosion during the coal tar refinery in aspects of feedstock pre-treatment,process innovation and equipment upgrading,etc.

The impact of different particle sizes,speed and rotator position to the flow line of tar cutting pump and solid particle distribution are analyzed in this paper.The result of the numerical simulation shows that low flow would cause serious vortex flow and little impact to the solid-phase concentration distribution and that the bigger the particle sizes and concentration,the higher the concentration of solid-phase of the rotator working medium,and the more serious wearing and erosion to the rotator surface.It also suggests that the increased speed may improve pulverizing efficiency and may undermine the life expectancy of the equipment.

Oxygen analyzer LGA-4130 is used for on-line measurement of oxygen content in gas after electro-static tar precipitator (ETP) and for interlock shutdown of the ETP in case of reaching the HH limit of the oxygen value preset on DCS aiming at a safe and stable running of the ETP.The advantages and disadvantages of this analyzing system are studied in this paper,suggestions for improvement are also given.

High content of tar in coal water effects normal operations of ammonia distillation system and waste water treatment system.After microporous ceramic filter is introduced,some shortcomings of coal tar remover are proved through process optimization and equipment improvement to reduce the content of tar in coal water and ensure normal operation.

Corroded gas valves and pipes, affected output of ammonium sulfate as well as threatened security in operation all result in acid exist in gas after saturator, and current fluctuated in circulating pump. After removing acid from gas and stabilizing the current, the operating cycle of equipment is prolonged and the loss of spare parts is reduced.

Characters of coking wastewater and the running condition of AAOO-Fenton oxidation process in Jinan Iron and Steel Coking Plant are indicated. After handled by AAOO process, the wastewater from ammonia distillation plant is coagulating settled and is further treated by Fenton oxidation. The quality of treated water meets the second level of national wastewater discharge standard.