High temperature compressive strength of coke in the presence of different gases such as N2，CO2 and 50%N2+50%CO2 is studied under laboratory conditions to analyze the influence of temperature and  solution loss reaction to the high temperature compressive strength of coke.The result shows that with the increase of temperature，CO2 concentration and solution loss reaction extent，the high temperature compressive strength of coke decreases.The coke enduring a weak solution\|loss reaction tends to maintain the compressive strength of coke under high temperature.

This paper introduces the utilization status of low rank coal and the problems during thermal conversion,summarizes the influence of pretreatment technologies such as hydrothermal pretreatment,acid pretreatment,thermal pretreatment,solvent swelling,oxyalkylation and hydrogenation pretreatment to the structure,pyrolysis reactivity,tar quality and yield of low rank coal.It is proposed that with appropriate pretreatment technology,coal liquefaction conditions can be lowered,thermal conversion efficiency is increased,and tar quality is improved.Therefore,the goal of using low rank coal in a clean and efficient way can be achieved.

Slag,used as catalyst,is added to coking coal to prepare high reactivity coke.The influence of solution loss reaction temperature to the thermal properties of high reactivity coke and the change of coke structure after reaction are studied.The result shows that coke reactivity is improved with the addition of slag;coke reactivity increases linearly with the temperature rise of solution loss reaction,while the coke strength after reaction decreases slowly at first,then sharply;and the specific surface area of coke after reaction increases first and then decreases.

By calculating single\|pair vertical flue of 6m battery, the result is almost consistent with the design value.Accordingly,this paper has simulated six different heating modes in vertical flue as different work state and discussed the coefficient of excess air influence on nitrogen oxides generation.

Taking 5# and 6# coke oven as the research object,this paper refreshes PLC control system for existing coke ovens to realize factor K2 of automatic real\|time calculation.After using the automatic calculation method,K2 value can be calculated faster and more accurate so as to improve the production efficiency of coke oven and coke quality.

The changes of Y value,volume curve of gelatinous layer and X value of five individual coals under different bulk density are studied.The result shows that when the bulk density is increased from 0.75t/m3 to 1.2t/m3,Y value of gas coal,1/3 coking coal,fat coal and coking coal increases by 2.5mm,5.0mm,6.3mm and 5.8mm respectively,while there is no significant increase for lean coal; the volume curve of plastic layer for 1/3 coking coal changes from zigzag mountain type,which indicates that with the increase of bulk density,the plastic layer property of 1/3 coking coal is similar with that of fat coal,while the plastic layer property of gas coal,fat coal,coking coal and lean coal doesn’t change too much;X value of all the five individual coals decreases obviously with the increase of bulk density,and gas coal,1/3 coking coal fat coal and coking coal show obvious positive expansion during coking process.

With the measures like balance dust bin negative pressure,guide air flow of rotating dust discharge valve,adjustment of connection between dust bin and humidify facility etc. during dust humidifying so that dust can be evenly charged and water is properly supplied.To this end,the dust emission has been basically eliminated and the work environment has been improved.

To correctly and completely configure relay protection device of the motor in CDQ circulating fan is a critical issue of electric engineering of circulating fan.The author has considered the technical application such as sampling value differential protection algorithm and magnetron balance differential protection etc.during motor non\|work frequency operation.And more solution has been made for relay protection of the motor in CDQ circulating fan.

Regarding to the traveling system of charging car and pushing car for stamp\|charge battery No.3 and No.4 in PanSteel,the limitation of existing anticollision method and device is analyzed.An anticollision solution using FK-ULS type laser anticollision alarm is proposed,which improves the traveling safety of charging car and pushing car.

In the light of practical coal charging,coke pushing and CDQ process in coking industry,the rationality and performability of the limitation on emission required by Emission Standard of Pollutants for Coking Chemical Industry (GB 16171—2012) are analyzed;countermeasures and suggestions are also given to cope with the difficulty in execution of the standard.

By the battery production practice,the battery heat consumption has been reduced by the measures such as lower coke cake central temperature,lower free space temperature,increase charging quantity of each chamber and stable coefficient of excess air etc.And better economic results have been achieved.

Using polyethylene glycol as modifying agent,the process of reducing the content of benzo[a] pyrene in coal tar pitch under solvent condition is studied.The study shows that when the reaction solvent ratio is 2∶1 in volume between cyclohexane and toluene,the sulfuric acid and polyethylene glycol 600 used are 6.67% and 10% in weight of the coal tar pitch respectively,and the reaction takes place under the temperature of 80℃ for 5h,benzo[a] pyrene can be removed up to 85.59%.

This paper introduces the improvement details and technical features for new process of ammonia distillation by tubular furnace.After improving,the system can run steadily and continuously with 120t/h of handling waste water and 95.7mg/L of ammonia nitrogen in the waste water,lowering 37.2%.

This paper introduces three crude benzol distillation processes and makes comparison in respect of process features,media consumption and operation cost.The result shows that negative crude benzol distillation process with steam consumes less steam,separates less water for production of crude benzol,and has good economic benefit for low cost of raw material,less investment and low running cost.

De-heavy tower is operated under negative pressure,so it is very important to keep continuous and stable running of vacuum unit.This paper analyzes the factors that affects normal operation of vacuum unit.Good results were obtained after technical modification of vacuum unit.

Through phydical and chemical dynamic simulation experiment,the influence of different coagulations to the degradation property of inorganic pollution factor of wastewater was evaluated.The study indicated that M-180A/B can remove 80% of T-CN and F-.Provided constant water inflow,if the reation time extends by 1 time,the removal rate of each coagulation to T-CN and F- increases to different extent.

Coke-plant wastewater,contaminated by various pollutants,consists of complex components,and it lacks biodegradability.The discharging water after the advanced treatments of hyper-filtration and nanofiltration membrane can be used for recycled water.The factors that will influence the running of the membrane treatment system such as the inlet water quality,operation mode and membrane cleaning are summarized.

After application of coal moisture control in coking plant of TaiSteel,problems were found during consequent treatment of tar\|ammonia separation and ammnia liquor,such as block of flushing liqour nozzle,high resistance in cross\|pipe primary cooler,and decreasing of tar quality.With the addition of demulsifier,the problem in tar\|ammonia separation was solved,so the production was stablized.

Compared with rich-oil heaters,using pipe still leads to accidents every now and then,and wash oil inclines to deteriorate.As steam becomes the heat source in rich-oil heaters,the safer process enhances the quality of recycled wash oil,lowers the consumption of it,and steps up the crude benzol production significantly.

By means of precipitation-crystallization,the secondary salt in desulfurized potassium carbonate waste solution can be utilized to retrieve CuSCN and K2SO4.The optimum technological conditions are obtained through experiments.In addition,the concentration of secondary salt in waste liquid becomes much lower.

This paper elaborates the technical principal and the process control of absorption unit and desorption unit for ammonia scrubbing with ammonium phosphate solution and analyses problems such as pipe blockage,exhaust emissions during the production to optimize the operation and process and improve the efficiency of ammonia removal.

According to the standard and combining with the actual situation，this paper proposed some actions should be taken on site after discontinuing gas facilities to have a better understanding of the standard.